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Wu Y, Rytkin E, Bimrose M, Li S, Choi YS, Lee G, Wang Y, Tang L, Madrid M, Wickerson G, Chang JK, Gu J, Zhang Y, Liu J, Tawfick S, Huang Y, King WP, Efimov IR, Rogers JA. A Sewing Approach to the Fabrication of Eco/bioresorbable Electronics. Small 2023; 19:e2305017. [PMID: 37528504 DOI: 10.1002/smll.202305017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/15/2023] [Indexed: 08/03/2023]
Abstract
Eco/bioresorbable electronics represent an emerging class of technology defined by an ability to dissolve or otherwise harmlessly disappear in environmental or biological surroundings after a period of stable operation. The resulting devices provide unique capabilities as temporary biomedical implants, environmental sensors, and related systems. Recent publications report schemes to overcome challenges in fabrication that follow from the low thermostability and/or high chemical reactivity of the eco/bioresorbable constituent materials. Here, this work reports the use of high-speed sewing machines, as the basis for a high-throughput manufacturing technique that addresses many requirements for these applications, without the need for high temperatures or reactive solvents. Results demonstrate that a range of eco/bioresorbable metal wires and polymer threads can be embroidered into complex, user-defined conductive patterns on eco/bioresorbable substrates. Functional electronic components, such as stretchable interconnects and antennas are possible, along with fully integrated systems. Examples of the latter include wirelessly powered light-emitting diodes, radiofrequency identification tags, and temporary cardiac pacemakers. These advances add to a growing range of options in high-throughput, automated fabrication of eco/bioresorbable electronics.
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Affiliation(s)
- Yunyun Wu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Eric Rytkin
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Miles Bimrose
- Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Shupeng Li
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yeon Sik Choi
- Department of Materials Science and Engineering, Yonsei University, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Geumbee Lee
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Yue Wang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Lichao Tang
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Micah Madrid
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Grace Wickerson
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jan-Kai Chang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
- Wearifi Inc, Evanston, IL, 60208, USA
| | - Jianyu Gu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Yamin Zhang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Jiaqi Liu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Sameh Tawfick
- Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yonggang Huang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - William P King
- Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Igor R Efimov
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - John A Rogers
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
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Lee S, Choi YS, Do SH, Lee W, Lee CH, Lee M, Vojta M, Wang CN, Luetkens H, Guguchia Z, Choi KY. Kondo screening in a Majorana metal. Nat Commun 2023; 14:7405. [PMID: 37974022 PMCID: PMC10654600 DOI: 10.1038/s41467-023-43185-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 11/02/2023] [Indexed: 11/19/2023] Open
Abstract
Kondo impurities provide a nontrivial probe to unravel the character of the excitations of a quantum spin liquid. In the S = 1/2 Kitaev model on the honeycomb lattice, Kondo impurities embedded in the spin-liquid host can be screened by itinerant Majorana fermions via gauge-flux binding. Here, we report experimental signatures of metallic-like Kondo screening at intermediate temperatures in the Kitaev honeycomb material α-RuCl3 with dilute Cr3+ (S = 3/2) impurities. The static magnetic susceptibility, the muon Knight shift, and the muon spin-relaxation rate all feature logarithmic divergences, a hallmark of a metallic Kondo effect. Concurrently, the linear coefficient of the magnetic specific heat is large in the same temperature regime, indicating the presence of a host Majorana metal. This observation opens new avenues for exploring uncharted Kondo physics in insulating quantum magnets.
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Affiliation(s)
- S Lee
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang, 37673, Republic of Korea
| | - Y S Choi
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - S-H Do
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
| | - W Lee
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang, 37673, Republic of Korea
- Rare Isotope Science Project, Institute for Basic Science, Daejeon, 34000, Republic of Korea
| | - C H Lee
- Department of Physics, Chung-Ang University, 84 Heukseok-ro, Seoul, 06974, Republic of Korea
| | - M Lee
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA
| | - M Vojta
- Institut für Theoretische Physik, Technische Universität Dresden, 01062, Dresden, Germany
| | - C N Wang
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, Villigen PSI, 5232, Switzerland
| | - H Luetkens
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, Villigen PSI, 5232, Switzerland
| | - Z Guguchia
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, Villigen PSI, 5232, Switzerland
| | - K-Y Choi
- Department of Physics, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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Song J, Park J, Lee J, Lee YJ, Cho W, Min C, Kim MS, Rahmati M, Choi YS, Yon DK, Yeo SG. National prevalence and determinants of COVID-19 vaccine hesitancy during the initial phase pandemic. Eur Rev Med Pharmacol Sci 2023; 27:8280-8290. [PMID: 37750655 DOI: 10.26355/eurrev_202309_33588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
OBJECTIVE Although previous studies have explored the causes of COVID-19 vaccine hesitancy during the pandemic, there is a lack of generality and reproducibility in these studies. Therefore, we aimed to comprehensively identify the determinants of COVID-19 vaccine hesitancy through a representative nationwide cross-sectional study conducted in South Korea. SUBJECTS AND METHODS We used a nationwide, representative, and large-scale dataset from the 2021 Community Health Survey. By analyzing 193,495 participants, we investigated the nationwide incidence of COVID-19 vaccine hesitancy and the various causes thereof. RESULTS The national prevalence of COVID-19 vaccine hesitancy was 5.7% (95% CI, 5.5-5.8). COVID-19 vaccine hesitancy was associated with an increased incidence of the following factors: (1) demographic factors including early-middle adulthood [vs. late; odds ratio (OR), 1.51; 95% CI, 1.38-1.65] and male sex (vs. female sex; OR, 1.08; 95% CI, 1.01-1.14); (2) physically healthy subjects; (3) lower socio-economic status (vs. high household income; OR, 1.28; 95% CI, 1.19-1.38); (4) having mental illness (vs. normal mental status; OR, 1.25; 95% CI, 1.13-1.38); and (5) unhealthy habits such as current smoking (vs. non-smoking; OR, 1.22; 95% CI, 1.13-1.31); and insufficient physical activity (vs. sufficient; OR, 1.08; 95% CI, 1.01-1.17). Common reasons for vaccine hesitancy were concerns about side effects (41.34%), health problems (24.60%), and inability to select the type of vaccine (14.13%). CONCLUSIONS This representative large-scale nationwide study conducted in South Korea investigated the nationwide prevalence and determinants of vaccine hesitancy. Our results provide useful public health information, especially on novel aspects of vaccination strategies, for policymakers to improve the acceptance of COVID-19 vaccines.
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Affiliation(s)
- J Song
- Center for Digital Health, Medical Science Research Institute, Kyung Hee University College of Medicine, Seoul, South Korea.
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Clifton DR, Nelson DA, Choi YS, Edgeworth DB, Nelson KJ, Shell D, Deuster PA. Risk factors for musculoskeletal-related occupational disability among US Army soldiers. BMJ Mil Health 2023; 169:327-334. [PMID: 34373349 DOI: 10.1136/bmjmilitary-2021-001900] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/25/2021] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Minimising temporary and permanent disability associated with musculoskeletal conditions (MSK-D) is critical to the mission of the US Army. Prior research has identified potentially actionable risk factors for overall military disability and its MSK-D subset, including elevated body mass index, tobacco use and physical fitness. However, prior work does not appear to have addressed the impact of these factors on MSK-D when controlling for a full range of factors that may affect health behaviours, including aptitude scores that may serve as a proxy for health literacy. Identifying risk factors for MSK-D when providing control for all such factors may inform efforts to improve military readiness. METHODS We studied 494 757 enlisted Army soldiers from 2014 to 2017 using a combined medical and administrative database. Leveraging data from the Army's digital 'eProfile' system of duty restriction records, we defined MSK-D as the first restriction associated with musculoskeletal conditions and resulting in the inability to deploy or train. We used multivariable Cox proportional hazards regression to assess the associations between incident MSK-D and selected risk factors including aptitude scores, physical fitness test scores, body mass index and tobacco use. RESULTS Among the subjects, 281 278 (45.14%) experienced MSK-D. In the MSK-D hazards model, the highest effect size was for failing the physical fitness test (adjusted HR=1.63, 95% CI 1.58 to 1.67, p<0.001) compared with scoring ≥290 points. CONCLUSIONS The analysis revealed the strongest associations between physical fitness and MSK-D. Additional efforts are warranted to determine potential mechanisms for the observed associations between selected factors and MSK-D.
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Affiliation(s)
- Daniel R Clifton
- Department of Military and Emergency Medicine, Consortium for Health and Military Performance, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA
- Womack Army Medical Center, Fort Bragg, North Carolina, USA
| | - D A Nelson
- Department of Military and Emergency Medicine, Consortium for Health and Military Performance, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA
- Womack Army Medical Center, Fort Bragg, North Carolina, USA
| | - Y S Choi
- Womack Army Medical Center, Fort Bragg, North Carolina, USA
| | - D B Edgeworth
- Department of Military and Emergency Medicine, Consortium for Health and Military Performance, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA
- Womack Army Medical Center, Fort Bragg, North Carolina, USA
| | - K J Nelson
- Womack Army Medical Center, Fort Bragg, North Carolina, USA
| | - D Shell
- Health Services Policy and Oversight, Office of the Assistant Secretary of Defense for Health Affairs, Falls Church, Virginia, USA
| | - P A Deuster
- Department of Military and Emergency Medicine, Consortium for Health and Military Performance, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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Kim HG, Kim DS, Choi YS, Lee ES, Yoo HJ, Kim DY. High-intensity focused ultrasound therapy versus Coblation for treatment of inferior turbinate hypertrophy: Clinical trial. Clin Exp Otorhinolaryngol 2023; 16:141-147. [PMID: 36791808 DOI: 10.21053/ceo.2022.01312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 02/12/2023] [Indexed: 02/14/2023] Open
Abstract
Objectives To compare the efficacy and safety of high-intensity focused ultrasound (HIFU) therapy with coblation for the treatment of inferior turbinate hypertrophy (ITH). Methods In this randomized controlled clinical trial, a total of 20 patients underwent inferior turbinate surgery, which consisted of either HIFU or coblation therapy. Efficacy, safety and tolerability were evaluated by subjective symptom scores, acoustic rhinometry, and nasal endoscopy. Results The modified nasal obstruction symptom evaluation (NOSE) score and nasal obstruction visual analog scale (NO-VAS) were significantly decreased in both groups 12 weeks postoperatively. Differences between the evaluation scores of the two patient groups were not significant. On nasal endoscopy, the HIFU patients showed improvements in mucosal swelling sooner than the patients undergoing coblation therapy. Nasal crusting was significantly increased in the patients undergoing coblation over the patients undergoing HIFU therapy, until postoperative week 4. Mucosal preservation was superior in the HIFU patients. Although HIFU was less painful than coblation therapy during the procedure, the difference was not significant (4.9 vs 6.3, p=0.143). The difference between global satisfaction in the two groups was not significant, although satisfaction was slightly greater for the HIFU than the coblation patients (4.6 vs 4.1, p=0.393). Conclusion HIFU provided results similar to those of coblation therapy for patients with nasal obstruction due to ITH, but HIFU therapy caused less discomfort during the procedure. HIFU therapy appears to be a good noninvasive alternative to the current surgical modalities for ITH.
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Affiliation(s)
- Hyung Gu Kim
- Department of Otolaryngology-Head & Neck Surgery, Hanyang University Guri Hospital, Guri, Korea
| | | | - Yeon Sik Choi
- Korea Electronics Technology Institute, Seongnam, Korea
| | | | - Hye-Jin Yoo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Dong-Young Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
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Ban CY, Shin H, Eum S, Yon H, Lee SW, Choi YS, Shin YH, Shin JU, Koyanagi A, Jacob L, Smith L, Min C, Yeniova AÖ, Kim SY, Lee J, Yeo SG, Kwon R, Koo MJ, Fond G, Boyer L, Acharya KP, Kim S, Woo HG, Park S, Shin JI, Rhee SY, Yon DK. 17-year trends of body mass index, overweight, and obesity among adolescents from 2005 to 2021, including the COVID-19 pandemic: a Korean national representative study. Eur Rev Med Pharmacol Sci 2023; 27:1565-1575. [PMID: 36876712 DOI: 10.26355/eurrev_202302_31399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
OBJECTIVE There is a lack of pediatric studies that have analyzed trends in mean body mass index (BMI) and the prevalence of obesity and overweight over a period that includes the mid-stage of the COVID-19 pandemic. Thus, we aimed to investigate trends in BMI, overweight, and obesity among Korean adolescents from 2005 to 2021, including the COVID-19 pandemic. SUBJECTS AND METHODS We used data from the Korea Youth Risk Behavior Web-based Survey (KYRBS), which is nationally representative of South Korea. The study included middle- and high-school students between the ages of 12 and 18. We examined trends in mean BMI and prevalence of obesity and/or overweight during the COVID-19 pandemic and compared these to those of pre-pandemic trends in each subgroup by gender, grade, and residential region. RESULTS Data from 1,111,300 adolescents (mean age: 15.04 years) were analyzed. The estimated weighted mean BMI was 20.48 kg/m2 (95% CI, 20.46-20.51) between 2005 and 2007, and this was 21.61 kg/m2 (95% CI, 21.54-21.68) in 2021. The prevalence of overweight and obesity was 13.1% (95% CI, 12.9-13.3%) between 2005 and 2007 and 23.4% (95% CI, 22.8-24.0%) in 2021. The mean BMI and prevalence of obesity and overweight have gradually increased over the past 17 years; however, the extent of change in mean BMI and in the prevalence of obesity and overweight during the pandemic was distinctly less than before. The 17-year trends in the mean BMI, obesity, and overweight exhibited a considerable rise from 2005 to 2021; however, the slope during the COVID-19 pandemic (2020-2021) was significantly less prominent than in the pre-pandemic (2005-2019). CONCLUSIONS These findings enable us to comprehend long-term trends in the mean BMI of Korean adolescents and further emphasize the need for practical prevention measures against youth obesity and overweight.
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Affiliation(s)
- C Y Ban
- Department of Medicine, Kyung Hee University College of Medicine, Seoul, South Korea.
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Yoon HJ, Lee G, Kim JT, Yoo JY, Luan H, Cheng S, Kang S, Huynh HLT, Kim H, Park J, Kim J, Kwak SS, Ryu H, Kim J, Choi YS, Ahn HY, Choi J, Oh S, Jung YH, Park M, Bai W, Huang Y, Chamorro LP, Park Y, Rogers JA. Biodegradable, three-dimensional colorimetric fliers for environmental monitoring. Sci Adv 2022; 8:eade3201. [PMID: 36563148 PMCID: PMC9788784 DOI: 10.1126/sciadv.ade3201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Recently reported winged microelectronic systems offer passive flight mechanisms as a dispersal strategy for purposes in environmental monitoring, population surveillance, pathogen tracking, and other applications. Initial studies indicate potential for technologies of this type, but advances in structural and responsive materials and in aerodynamically optimized geometries are necessary to improve the functionality and expand the modes of operation. Here, we introduce environmentally degradable materials as the basis of 3D fliers that allow remote, colorimetric assessments of multiple environmental parameters-pH, heavy metal concentrations, and ultraviolet exposure, along with humidity levels and temperature. Experimental and theoretical investigations of the aerodynamics of these systems reveal design considerations that include not only the geometries of the structures but also their mass distributions across a range of bioinspired designs. Preliminary field studies that rely on drones for deployment and for remote colorimetric analysis by machine learning interpretation of digital images illustrate scenarios for practical use.
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Affiliation(s)
- Hong-Joon Yoon
- Department of Electronic Engineering, Gachon University, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Geumbee Lee
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Jin-Tae Kim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Jae-Young Yoo
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Haiwen Luan
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Shyuan Cheng
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL 61801, USA
| | - Soohyeon Kang
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL 61801, USA
| | - Huong Le Thien Huynh
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Hyeonsu Kim
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL 61801, USA
| | - Jaehong Park
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL 61801, USA
| | - Joohee Kim
- Center for Bionics of Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Sung Soo Kwak
- Center for Bionics of Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Hanjun Ryu
- Department of Advanced Materials Engineering, Chung-Ang University, 4726 Seodong-daero, Daedeok-myeon, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - Jihye Kim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Yeon Sik Choi
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Hak-Young Ahn
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Junhwan Choi
- Department of Chemical Engineering, Dankook University, Yongin 16890, Republic of Korea
| | - Seyong Oh
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Yei Hwan Jung
- Department of Electronic Engineering, Hanyang University, Seoul, Republic of Korea
| | - Minsu Park
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Wubin Bai
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Yonggang Huang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Leonardo P. Chamorro
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL 61801, USA
| | - Yoonseok Park
- Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin 17104, Republic of Korea
| | - John A. Rogers
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Neurological Surgery, Northwestern University, Evanston, IL 60208, USA
- Feinberg School of Medicine, Northwestern University, Evanston, IL 60208, USA
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Lee G, Ray E, Yoon HJ, Genovese S, Choi YS, Lee MK, Şahin S, Yan Y, Ahn HY, Bandodkar AJ, Kim J, Park M, Ryu H, Kwak SS, Jung YH, Odabas A, Khandpur U, Ray WZ, MacEwan MR, Rogers JA. A bioresorbable peripheral nerve stimulator for electronic pain block. Sci Adv 2022; 8:eabp9169. [PMID: 36197971 PMCID: PMC9534494 DOI: 10.1126/sciadv.abp9169] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 08/18/2022] [Indexed: 05/31/2023]
Abstract
Local electrical stimulation of peripheral nerves can block the propagation of action potentials, as an attractive alternative to pharmacological agents for the treatment of acute pain. Traditional hardware for such purposes, however, involves interfaces that can damage nerve tissue and, when used for temporary pain relief, that impose costs and risks due to requirements for surgical extraction after a period of need. Here, we introduce a bioresorbable nerve stimulator that enables electrical nerve block and associated pain mitigation without these drawbacks. This platform combines a collection of bioresorbable materials in architectures that support stable blocking with minimal adverse mechanical, electrical, or biochemical effects. Optimized designs ensure that the device disappears harmlessly in the body after a desired period of use. Studies in live animal models illustrate capabilities for complete nerve block and other key features of the technology. In certain clinically relevant scenarios, such approaches may reduce or eliminate the need for use of highly addictive drugs such as opioids.
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Affiliation(s)
- Geumbee Lee
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Emily Ray
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Hong-Joon Yoon
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Sabrina Genovese
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Yeon Sik Choi
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Min-Kyu Lee
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Samet Şahin
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Bioengineering, Bilecik Şeyh Edebali University, 11230 Bilecik, Merkez/Bilecik, Turkey
| | - Ying Yan
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Hak-Young Ahn
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Amay J. Bandodkar
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27606, USA
- Center for Advanced Self-Powered Systems of Integrated Sensors and Technologies (ASSIST), North Carolina State University, Raleigh, NC 27606, USA
| | - Joohee Kim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Minsu Park
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Hanjun Ryu
- Department of Advanced Materials Engineering, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Sung Soo Kwak
- Center for Bionics, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Yei Hwan Jung
- Department of Electronic Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Arman Odabas
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
- Department of Internal Medicine, Stanford University Medical Center, Stanford, CA 94305, USA
| | - Umang Khandpur
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Wilson Z. Ray
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Matthew R. MacEwan
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Neurological Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - John A. Rogers
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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9
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Girka OI, Lee KI, Choi YS, Jang SO. Ion beam figuring with focused anode layer thruster. Rev Sci Instrum 2022; 93:063304. [PMID: 35778031 DOI: 10.1063/5.0071800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
This work presents the peculiarities of cone ion beam formation with a focused thruster with anode layer (TAL) and its application to silicon carbide (SiC) ion beam figuring. Modeling results of Lorentz E × B force distribution in the discharge gap are presented. 3D particle tracing for keV Ar ions is carried out for the first time in the beam drift region of TAL with magnetic lens. Extracted ion beam full width at half maxima is about 2 mm in the focal plane, where the SiC etching rate reaches 0.5 µm/min. The SiC sputter yields are measured as a function of the Ar ion impact energy and beam incidence angle. The maximum sputter yield of 2.8 atom/ion is observed at 45° of the beam-sample angle for the Si targets. Furthermore, the maximum sputter yield value of 1.7 atom/ion is measured at 30° of the beam-sample angle for the SiC targets. The novelty of present research is in the application of focused TAL keV Ar ion beam to the SiC ion beam figuring.
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Affiliation(s)
- O I Girka
- Institute of Plasma Technologies, Korea Institute of Fusion Energy, 37 Dongjangsan-ro, 54004 Gunsan-si, Jeollabuk-do, Republic of Korea
| | - K I Lee
- Institute of Plasma Technologies, Korea Institute of Fusion Energy, 37 Dongjangsan-ro, 54004 Gunsan-si, Jeollabuk-do, Republic of Korea
| | - Y S Choi
- Institute of Plasma Technologies, Korea Institute of Fusion Energy, 37 Dongjangsan-ro, 54004 Gunsan-si, Jeollabuk-do, Republic of Korea
| | - S O Jang
- Institute of Plasma Technologies, Korea Institute of Fusion Energy, 37 Dongjangsan-ro, 54004 Gunsan-si, Jeollabuk-do, Republic of Korea
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10
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Choi YS, Jeong H, Yin RT, Avila R, Pfenniger A, Yoo J, Lee JY, Tzavelis A, Lee YJ, Chen SW, Knight HS, Kim S, Ahn HY, Wickerson G, Vázquez-Guardado A, Higbee-Dempsey E, Russo BA, Napolitano MA, Holleran TJ, Razzak LA, Miniovich AN, Lee G, Geist B, Kim B, Han S, Brennan JA, Aras K, Kwak SS, Kim J, Waters EA, Yang X, Burrell A, Chun KS, Liu C, Wu C, Rwei AY, Spann AN, Banks A, Johnson D, Zhang ZJ, Haney CR, Jin SH, Sahakian AV, Huang Y, Trachiotis GD, Knight BP, Arora RK, Efimov IR, Rogers JA. A transient, closed-loop network of wireless, body-integrated devices for autonomous electrotherapy. Science 2022; 376:1006-1012. [PMID: 35617386 PMCID: PMC9282941 DOI: 10.1126/science.abm1703] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Temporary postoperative cardiac pacing requires devices with percutaneous leads and external wired power and control systems. This hardware introduces risks for infection, limitations on patient mobility, and requirements for surgical extraction procedures. Bioresorbable pacemakers mitigate some of these disadvantages, but they demand pairing with external, wired systems and secondary mechanisms for control. We present a transient closed-loop system that combines a time-synchronized, wireless network of skin-integrated devices with an advanced bioresorbable pacemaker to control cardiac rhythms, track cardiopulmonary status, provide multihaptic feedback, and enable transient operation with minimal patient burden. The result provides a range of autonomous, rate-adaptive cardiac pacing capabilities, as demonstrated in rat, canine, and human heart studies. This work establishes an engineering framework for closed-loop temporary electrotherapy using wirelessly linked, body-integrated bioelectronic devices.
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Affiliation(s)
- Yeon Sik Choi
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Precision Biology Research Center, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hyoyoung Jeong
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Rose T. Yin
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Anna Pfenniger
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL 60611, USA
| | - Jaeyoung Yoo
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Jong Yoon Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Sibel Health, Niles, IL, 60714, USA
| | - Andreas Tzavelis
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Medical Scientist Training Program, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Young Joong Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Sheena W. Chen
- Department of General Surgery, The George Washington University, Washington, DC 20052, USA
- Department of Cardiothoracic Surgery, Veteran Affairs Medical Center, Washington, DC 20422, USA
| | - Helen S. Knight
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Seungyeob Kim
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Electronic Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon, 406-772, Republic of Korea
| | - Hak-Young Ahn
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Precision Biology Research Center, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Grace Wickerson
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Abraham Vázquez-Guardado
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | | | - Bender A. Russo
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Michael A. Napolitano
- Department of General Surgery, The George Washington University, Washington, DC 20052, USA
- Department of Cardiothoracic Surgery, Veteran Affairs Medical Center, Washington, DC 20422, USA
| | - Timothy J. Holleran
- Department of General Surgery, The George Washington University, Washington, DC 20052, USA
- Department of Cardiothoracic Surgery, Veteran Affairs Medical Center, Washington, DC 20422, USA
| | - Leen Abdul Razzak
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Alana N. Miniovich
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Geumbee Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Beth Geist
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL 60611, USA
| | | | - Shuling Han
- Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Jaclyn A. Brennan
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Kedar Aras
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Sung Soo Kwak
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Current Address: Center for Bionics of Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Korea
| | - Joohee Kim
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Emily Alexandria Waters
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL 60208, USA
| | - Xiangxing Yang
- Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Tx, 78712, USA
| | - Amy Burrell
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL 60611, USA
| | - Keum San Chun
- Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Tx, 78712, USA
| | - Claire Liu
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - Changsheng Wu
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Alina Y. Rwei
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Alisha N. Spann
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL 60208, USA
| | - Anthony Banks
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - David Johnson
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL 60611, USA
| | - Zheng Jenny Zhang
- Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Chad R. Haney
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL 60208, USA
| | - Sung Hun Jin
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Electronic Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon, 406-772, Republic of Korea
| | - Alan Varteres Sahakian
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Gregory D. Trachiotis
- Department of Cardiothoracic Surgery, Veteran Affairs Medical Center, Washington, DC 20422, USA
| | - Bradley P. Knight
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL 60611, USA
| | - Rishi K. Arora
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL 60611, USA
| | - Igor R. Efimov
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA
| | - John A. Rogers
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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11
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Oh YS, Kim JH, Xie Z, Cho S, Han H, Jeon SW, Park M, Namkoong M, Avila R, Song Z, Lee SU, Ko K, Lee J, Lee JS, Min WG, Lee BJ, Choi M, Chung HU, Kim J, Han M, Koo J, Choi YS, Kwak SS, Kim SB, Kim J, Choi J, Kang CM, Kim JU, Kwon K, Won SM, Baek JM, Lee Y, Kim SY, Lu W, Vazquez-Guardado A, Jeong H, Ryu H, Lee G, Kim K, Kim S, Kim MS, Choi J, Choi DY, Yang Q, Zhao H, Bai W, Jang H, Yu Y, Lim J, Guo X, Kim BH, Jeon S, Davies C, Banks A, Sung HJ, Huang Y, Park I, Rogers JA. Author Correction: Battery-free, wireless soft sensors for continuous multi-site measurements of pressure and temperature from patients at risk for pressure injuries. Nat Commun 2021; 12:6827. [PMID: 34795252 PMCID: PMC8602244 DOI: 10.1038/s41467-021-26984-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Yong Suk Oh
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.,Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Jae-Hwan Kim
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.,Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA.,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, People's Republic of China.,Ningbo Institute of Dalian University of Technology, Ningbo, People's Republic of China
| | - Seokjoo Cho
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Hyeonseok Han
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sung Woo Jeon
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Minsu Park
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Myeong Namkoong
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Zhen Song
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, People's Republic of China.,Ningbo Institute of Dalian University of Technology, Ningbo, People's Republic of China
| | - Sung-Uk Lee
- Advanced 3D Printing Technology Development Division, Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
| | | | | | - Je-Sang Lee
- Department of Rehabilitation Medicine, Gimhae Hansol Rehabilitation & Convalescent Hospital, Gimhae, Republic of Korea
| | - Weon Gi Min
- Department of Planning and Development, Gimhae Hansol Rehabilitation & Convalescent Hospital, Gimhae, Republic of Korea
| | - Byeong-Ju Lee
- Department of Rehabilitation Medicine, Pusan national university hospital, Busan, Republic of Korea
| | - Myungwoo Choi
- Department of Materials Science and Engineering, KAIST Institute for The Nanocentury (KINC), Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | | | - Jongwon Kim
- Sibel Health Inc, Niles, IL, USA.,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.,Department of Mechanical Engineering, Kyung Hee University, Yongin, Republic of Korea
| | - Mengdi Han
- Department of Biomedical Engineering, College of Future Technology, Peking University, Beijing, People's Republic of China
| | - Jahyun Koo
- School of Biomedical Engineering, Korea University, Seoul, Republic of Korea.,Interdisciplinary Program in Precision Public Health, Korea University, Seoul, Republic of Korea
| | - Yeon Sik Choi
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Sung Soo Kwak
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Sung Bong Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA.,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Jeonghyun Kim
- Department of Electronic Convergence Engineering, Kwangwoon University, Seoul, Republic of Korea
| | - Jungil Choi
- School of Mechanical Engineering, Kookmin University, Seoul, Republic of Korea
| | - Chang-Mo Kang
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA
| | - Jong Uk Kim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,School of Chemical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Kyeongha Kwon
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sang Min Won
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Janice Mihyun Baek
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Yujin Lee
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - So Young Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Wei Lu
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
| | - Abraham Vazquez-Guardado
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Hyoyoung Jeong
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Hanjun Ryu
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
| | - Geumbee Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Kyuyoung Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Seunghwan Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Min Seong Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Jungrak Choi
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Dong Yun Choi
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology (KITECH), Yeongcheon, Republic of Korea
| | - Quansan Yang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Hangbo Zhao
- Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Wubin Bai
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Hokyung Jang
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | | | - Jaeman Lim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Xu Guo
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, People's Republic of China.,Ningbo Institute of Dalian University of Technology, Ningbo, People's Republic of China
| | - Bong Hoon Kim
- Department of Organic Materials and Fiber Engineering, Soongsil University, Seoul, Republic of Korea
| | - Seokwoo Jeon
- Department of Materials Science and Engineering, KAIST Institute for The Nanocentury (KINC), Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Charles Davies
- Carle Neuroscience Institute, Carle, Physician Group, Urbana, IL, USA
| | - Anthony Banks
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Hyung Jin Sung
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA. .,Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA. .,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA. .,Departments of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.
| | - Inkyu Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
| | - John A Rogers
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA. .,Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA. .,Department of Materials Science and Engineering, KAIST Institute for The Nanocentury (KINC), Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea. .,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA. .,Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA. .,Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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12
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Yang Q, Wei T, Yin RT, Wu M, Xu Y, Koo J, Choi YS, Xie Z, Chen SW, Kandela I, Yao S, Deng Y, Avila R, Liu TL, Bai W, Yang Y, Han M, Zhang Q, Haney CR, Benjamin Lee K, Aras K, Wang T, Seo MH, Luan H, Lee SM, Brikha A, Ghoreishi-Haack N, Tran L, Stepien I, Aird F, Waters EA, Yu X, Banks A, Trachiotis GD, Torkelson JM, Huang Y, Kozorovitskiy Y, Efimov IR, Rogers JA. Photocurable bioresorbable adhesives as functional interfaces between flexible bioelectronic devices and soft biological tissues. Nat Mater 2021; 20:1559-1570. [PMID: 34326506 PMCID: PMC8551016 DOI: 10.1038/s41563-021-01051-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 06/11/2021] [Indexed: 05/07/2023]
Abstract
Flexible electronic/optoelectronic systems that can intimately integrate onto the surfaces of vital organ systems have the potential to offer revolutionary diagnostic and therapeutic capabilities relevant to a wide spectrum of diseases and disorders. The critical interfaces between such technologies and living tissues must provide soft mechanical coupling and efficient optical/electrical/chemical exchange. Here, we introduce a functional adhesive bioelectronic-tissue interface material, in the forms of mechanically compliant, electrically conductive, and optically transparent encapsulating coatings, interfacial layers or supporting matrices. These materials strongly bond both to the surfaces of the devices and to those of different internal organs, with stable adhesion for several days to months, in chemistries that can be tailored to bioresorb at controlled rates. Experimental demonstrations in live animal models include device applications that range from battery-free optoelectronic systems for deep-brain optogenetics and subdermal phototherapy to wireless millimetre-scale pacemakers and flexible multielectrode epicardial arrays. These advances have immediate applicability across nearly all types of bioelectronic/optoelectronic system currently used in animal model studies, and they also have the potential for future treatment of life-threatening diseases and disorders in humans.
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Affiliation(s)
- Quansan Yang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Tong Wei
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
| | - Rose T Yin
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Mingzheng Wu
- Department of Neurobiology, Northwestern University, Evanston, IL, USA
| | - Yameng Xu
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Jahyun Koo
- School of Biomedical Engineering, Korea University, Seoul, Republic of Korea
| | - Yeon Sik Choi
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, China
- Department of Engineering Mechanics, Dalian University of Technology, Dalian, China
- Ningbo Institute of Dalian University of Technology, Ningbo, China
| | - Sheena W Chen
- Department of Surgery, The George Washington University, Washington, DC, USA
| | - Irawati Kandela
- Developmental Therapeutics Core, Northwestern University, Evanston, IL, USA
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
| | - Shenglian Yao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China
| | - Yujun Deng
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, China
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Tzu-Li Liu
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Wubin Bai
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Yiyuan Yang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Mengdi Han
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Qihui Zhang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Chad R Haney
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - K Benjamin Lee
- Department of Surgery, The George Washington University, Washington, DC, USA
| | - Kedar Aras
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Tong Wang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
| | - Min-Ho Seo
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- School of Biomedical Convergence Engineering, College of Information & Biomedical Engineering, Pusan National University, Pusan, Republic of Korea
| | - Haiwen Luan
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Seung Min Lee
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Anlil Brikha
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, USA
| | | | - Lori Tran
- Developmental Therapeutics Core, Northwestern University, Evanston, IL, USA
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
| | - Iwona Stepien
- Developmental Therapeutics Core, Northwestern University, Evanston, IL, USA
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
| | - Fraser Aird
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
| | - Emily A Waters
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Xinge Yu
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China
| | - Anthony Banks
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Gregory D Trachiotis
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
- DC Veterans Affairs Medical Center, The George Washington University, Washington, DC, USA
| | - John M Torkelson
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- Departments of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA
| | - Yevgenia Kozorovitskiy
- Department of Neurobiology, Northwestern University, Evanston, IL, USA.
- Chemistry Life Processes Institute, Northwestern University, Evanston, IL, USA.
| | - Igor R Efimov
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA.
| | - John A Rogers
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA.
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA.
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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13
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Wang H, D'Andrea D, Choi YS, Bouricha Y, Wickerson G, Ahn HY, Guo H, Huang Y, Sandhu MS, Jordan SW, Rogers JA, Franz CK. Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing. J Vis Exp 2021. [PMID: 34747395 DOI: 10.3791/63085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Peripheral nerve interfaces are frequently used in experimental neuroscience and regenerative medicine for a wide variety of applications. Such interfaces can be sensors, actuators, or both. Traditional methods of peripheral nerve interfacing must either tether to an external system or rely on battery power that limits the time frame for operation. With recent developments of wireless, battery-free, and fully implantable peripheral nerve interfaces, a new class of devices can offer capabilities that match or exceed those of their wired or battery-powered precursors. This paper describes methods to (i) surgically implant and (ii) wirelessly power and control this system in adult rats. The sciatic and phrenic nerve models were selected as examples to highlight the versatility of this approach. The paper shows how the peripheral nerve interface can evoke compound muscle action potentials (CMAPs), deliver a therapeutic electrical stimulation protocol, and incorporate a conduit for the repair of peripheral nerve injury. Such devices offer expanded treatment options for single-dose or repeated dose therapeutic stimulation and can be adapted to a variety of nerve locations.
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Affiliation(s)
- Hongkai Wang
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine; Northwestern University Interdepartmental Neuroscience Program
| | - Dom D'Andrea
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine
| | - Yeon Sik Choi
- Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University; Department of Materials Science and Engineering, Northwestern University
| | - Yasmine Bouricha
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine
| | - Grace Wickerson
- Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University; Department of Materials Science and Engineering, Northwestern University
| | - Hak-Young Ahn
- Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University
| | - Hexia Guo
- Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University; Department of Materials Science and Engineering, Northwestern University
| | - Yonggang Huang
- Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University; Department of Materials Science and Engineering, Northwestern University; Department of Civil and Environmental Engineering, Northwestern University; Department of Mechanical Engineering, Northwestern University
| | - Milap S Sandhu
- Arms and Hands Lab, Shirley Ryan AbilityLab, Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine
| | - Sumanas W Jordan
- Division of Plastic and Reconstructive Surgery, Biologics, Shirley Ryan AbilityLab, Northwestern University
| | - John A Rogers
- Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University; Department of Materials Science and Engineering, Northwestern University; Department of Mechanical Engineering, Northwestern University; Department of Biomedical Engineering, Northwestern University; Department of Neurological Surgery, Northwestern University; Department of Chemistry, Northwestern University; Department of Electrical and Computer Engineering, Northwestern University
| | - Colin K Franz
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine; Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University; The Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine;
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14
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Choi YS, Yin RT, Pfenniger A, Koo J, Avila R, Benjamin Lee K, Chen SW, Lee G, Li G, Qiao Y, Murillo-Berlioz A, Kiss A, Han S, Lee SM, Li C, Xie Z, Chen YY, Burrell A, Geist B, Jeong H, Kim J, Yoon HJ, Banks A, Kang SK, Zhang ZJ, Haney CR, Sahakian AV, Johnson D, Efimova T, Huang Y, Trachiotis GD, Knight BP, Arora RK, Efimov IR, Rogers JA. Fully implantable and bioresorbable cardiac pacemakers without leads or batteries. Nat Biotechnol 2021; 39:1228-1238. [PMID: 34183859 PMCID: PMC9270064 DOI: 10.1038/s41587-021-00948-x] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 05/06/2021] [Indexed: 12/22/2022]
Abstract
Temporary cardiac pacemakers used in periods of need during surgical recovery involve percutaneous leads and externalized hardware that carry risks of infection, constrain patient mobility and may damage the heart during lead removal. Here we report a leadless, battery-free, fully implantable cardiac pacemaker for postoperative control of cardiac rate and rhythm that undergoes complete dissolution and clearance by natural biological processes after a defined operating timeframe. We show that these devices provide effective pacing of hearts of various sizes in mouse, rat, rabbit, canine and human cardiac models, with tailored geometries and operation timescales, powered by wireless energy transfer. This approach overcomes key disadvantages of traditional temporary pacing devices and may serve as the basis for the next generation of postoperative temporary pacing technology.
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Affiliation(s)
- Yeon Sik Choi
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Rose T Yin
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Anna Pfenniger
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL, USA
| | - Jahyun Koo
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - K Benjamin Lee
- Department of Surgery, The George Washington University, Washington, DC, USA
| | - Sheena W Chen
- Department of Surgery, The George Washington University, Washington, DC, USA
| | - Geumbee Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Gang Li
- Center for Cardiovascular Research, Washington University School of Medicine, St. Louis, MO, USA
| | - Yun Qiao
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | | | - Alexi Kiss
- Department of Anatomy and Cell Biology, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
- The George Washington Cancer Center, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Shuling Han
- Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Seung Min Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
| | - Chenhang Li
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian, China
| | - Yu-Yu Chen
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Amy Burrell
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL, USA
| | - Beth Geist
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL, USA
| | - Hyoyoung Jeong
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
| | - Joohee Kim
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
| | - Hong-Joon Yoon
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Anthony Banks
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA
| | - Seung-Kyun Kang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Zheng Jenny Zhang
- Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Chad R Haney
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, USA
| | - Alan Varteres Sahakian
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA
| | - David Johnson
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL, USA
| | - Tatiana Efimova
- Department of Anatomy and Cell Biology, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
- The George Washington Cancer Center, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA
| | - Gregory D Trachiotis
- Department of Cardiothoracic Surgery, Veteran Affairs Medical Center, Washington, DC, USA
| | - Bradley P Knight
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL, USA
| | - Rishi K Arora
- Feinberg School of Medicine, Cardiology, Northwestern University, Chicago, IL, USA.
| | - Igor R Efimov
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA.
| | - John A Rogers
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, USA.
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA.
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA.
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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15
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Kim YD, Choi YS, Na HG, Song SY, Bae CH. [MUC4 Silencing Inhibits TGF-β1-induced Epithelial-mesenchymal Transition VIA the ERK1/2 Pathway in Human Airway Epithelial NCI-H292 Cells]. Mol Biol (Mosk) 2021; 55:617-625. [PMID: 34432779 DOI: 10.31857/s0026898421040078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/19/2020] [Indexed: 11/24/2022]
Abstract
MUC4 is a predominant membrane-tethered mucin lubricating and protecting the epithelial surface and playing various biological roles in the renewal and differentiation of epithelial cells, cell signaling, cell adhesion, and carcinogenesis. Interestingly, recent studies have demonstrated that MUC4 expression regulates the epithelial-mesenchymal transition (EMT) of cancer cells in ovarian, pancreatic, and lung cancer. However, the effects of MUC4 expression on EMT in human airway epithelial cells are not yet well known. Here, we describe the effects of transforming growth factor beta 1 (TGF-β1)-induced MUC4 expression on EMT and evaluate its downstream signaling pathway in human airway epithelial cells. In human airway epithelial NCI-H292 cells, exposure to TGF-β1 induced expression of MUC4, CDH2, VIM and SNAI1 genes and encoded by them proteins, MUC4, N-cadherin, vimentin and Snail, and reduced the level of CDH1 and its product, E-cadherin. In MUC4-knockdown cells, TGF-β1-induced expression levels of MUC4, CDH2, VIM and SNAI1 and corresponding proteins were suppressed, but CDH1 and E-cadherin levels were not. In addition, TGF-β1-induced phosphorylation of extracellular signal regulated kinase 1/2 (ERK1/2) was suppressed, but that of Smad2/3, Akt, and p38 was not. The results of this study suggest that MUC4 silencing inhibits TGF-β1 -induced EMT via the ERK1/2 pathway, and a possible role of MUC4 in the induction of EMT in human airway epithelial cells.
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Affiliation(s)
- Y-D Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, 42415 Republic of Korea.,Regional Center for Respiratory Diseases, Yeungnam University Medical Center, Daegu, 42415 Republic of Korea
| | - Y S Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, 42415 Republic of Korea
| | - H G Na
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, 42415 Republic of Korea
| | - S-Y Song
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, 42415 Republic of Korea
| | - C H Bae
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, 42415 Republic of Korea.,
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16
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Oh YS, Kim JH, Xie Z, Cho S, Han H, Jeon SW, Park M, Namkoong M, Avila R, Song Z, Lee SU, Ko K, Lee J, Lee JS, Min WG, Lee BJ, Choi M, Chung HU, Kim J, Han M, Koo J, Choi YS, Kwak SS, Kim SB, Kim J, Choi J, Kang CM, Kim JU, Kwon K, Won SM, Baek JM, Lee Y, Kim SY, Lu W, Vazquez-Guardado A, Jeong H, Ryu H, Lee G, Kim K, Kim S, Kim MS, Choi J, Choi DY, Yang Q, Zhao H, Bai W, Jang H, Yu Y, Lim J, Guo X, Kim BH, Jeon S, Davies C, Banks A, Sung HJ, Huang Y, Park I, Rogers JA. Battery-free, wireless soft sensors for continuous multi-site measurements of pressure and temperature from patients at risk for pressure injuries. Nat Commun 2021; 12:5008. [PMID: 34429436 PMCID: PMC8385057 DOI: 10.1038/s41467-021-25324-w] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 07/27/2021] [Indexed: 02/03/2023] Open
Abstract
Capabilities for continuous monitoring of pressures and temperatures at critical skin interfaces can help to guide care strategies that minimize the potential for pressure injuries in hospitalized patients or in individuals confined to the bed. This paper introduces a soft, skin-mountable class of sensor system for this purpose. The design includes a pressure-responsive element based on membrane deflection and a battery-free, wireless mode of operation capable of multi-site measurements at strategic locations across the body. Such devices yield continuous, simultaneous readings of pressure and temperature in a sequential readout scheme from a pair of primary antennas mounted under the bedding and connected to a wireless reader and a multiplexer located at the bedside. Experimental evaluation of the sensor and the complete system includes benchtop measurements and numerical simulations of the key features. Clinical trials involving two hemiplegic patients and a tetraplegic patient demonstrate the feasibility, functionality and long-term stability of this technology in operating hospital settings.
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Affiliation(s)
- Yong Suk Oh
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Jae-Hwan Kim
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, People's Republic of China
- Ningbo Institute of Dalian University of Technology, Ningbo, People's Republic of China
| | - Seokjoo Cho
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Hyeonseok Han
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sung Woo Jeon
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Minsu Park
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Myeong Namkoong
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Zhen Song
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, People's Republic of China
- Ningbo Institute of Dalian University of Technology, Ningbo, People's Republic of China
| | - Sung-Uk Lee
- Advanced 3D Printing Technology Development Division, Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
| | | | | | - Je-Sang Lee
- Department of Rehabilitation Medicine, Gimhae Hansol Rehabilitation & Convalescent Hospital, Gimhae, Republic of Korea
| | - Weon Gi Min
- Department of Planning and Development, Gimhae Hansol Rehabilitation & Convalescent Hospital, Gimhae, Republic of Korea
| | - Byeong-Ju Lee
- Department of Rehabilitation Medicine, Pusan national university hospital, Busan, Republic of Korea
| | - Myungwoo Choi
- Department of Materials Science and Engineering, KAIST Institute for The Nanocentury (KINC), Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | | | - Jongwon Kim
- Sibel Health Inc, Niles, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
- Department of Mechanical Engineering, Kyung Hee University, Yongin, Republic of Korea
| | - Mengdi Han
- Department of Biomedical Engineering, College of Future Technology, Peking University, Beijing, People's Republic of China
| | - Jahyun Koo
- School of Biomedical Engineering, Korea University, Seoul, Republic of Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, Republic of Korea
| | - Yeon Sik Choi
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Sung Soo Kwak
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Sung Bong Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Jeonghyun Kim
- Department of Electronic Convergence Engineering, Kwangwoon University, Seoul, Republic of Korea
| | - Jungil Choi
- School of Mechanical Engineering, Kookmin University, Seoul, Republic of Korea
| | - Chang-Mo Kang
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA
| | - Jong Uk Kim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Kyeongha Kwon
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sang Min Won
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Janice Mihyun Baek
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Yujin Lee
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - So Young Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Wei Lu
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
| | - Abraham Vazquez-Guardado
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Hyoyoung Jeong
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Hanjun Ryu
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
| | - Geumbee Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Kyuyoung Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Seunghwan Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Min Seong Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Jungrak Choi
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Dong Yun Choi
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology (KITECH), Yeongcheon, Republic of Korea
| | - Quansan Yang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Hangbo Zhao
- Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Wubin Bai
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Hokyung Jang
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | | | - Jaeman Lim
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Xu Guo
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, People's Republic of China
- Ningbo Institute of Dalian University of Technology, Ningbo, People's Republic of China
| | - Bong Hoon Kim
- Department of Organic Materials and Fiber Engineering, Soongsil University, Seoul, Republic of Korea
| | - Seokwoo Jeon
- Department of Materials Science and Engineering, KAIST Institute for The Nanocentury (KINC), Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Charles Davies
- Carle Neuroscience Institute, Carle, Physician Group, Urbana, IL, USA
| | - Anthony Banks
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Hyung Jin Sung
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA.
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
- Departments of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.
| | - Inkyu Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
| | - John A Rogers
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA.
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.
- Department of Materials Science and Engineering, KAIST Institute for The Nanocentury (KINC), Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA.
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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17
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Guo H, D'Andrea D, Zhao J, Xu Y, Qiao Z, Janes LE, Murthy NK, Li R, Xie Z, Song Z, Meda R, Koo J, Bai W, Choi YS, Jordan SW, Huang Y, Franz CK, Rogers JA. Advanced Materials in Wireless, Implantable Electrical Stimulators That Offer Rapid Rates of Bioresorption for Peripheral Axon Regeneration. Adv Funct Mater 2021; 31:2102724. [PMID: 36189172 PMCID: PMC9521812 DOI: 10.1002/adfm.202102724] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 06/01/2023]
Abstract
Injured peripheral nerves typically exhibit unsatisfactory and incomplete functional outcomes, and there are no clinically approved therapies for improving regeneration. Post-operative electrical stimulation (ES) increases axon regrowth, but practical challenges from the cost of extended operating room time to the risks and pitfalls associated with transcutaneous wire placement have prevented broad clinical adoption. This study presents a possible solution in the form of advanced bioresorbable materials for thin, flexible, wireless implant that provides precisely controlled ES of the injured nerve for a brief time in the immediate post-operative period. Afterward, rapid, complete and safe modes of bioresorption naturally and quickly eliminate all of the constituent materials in their entirety, without the need for surgical extraction. The unusually high rate of bioresorption follows from the use of a unique, bilayer enclosure that combines two distinct formulations of a biocompatible form of polyanhydride as an encapsulating structure, to accelerate the resorption of active components and confine fragments until complete resorption. Results from mouse models of tibial nerve transection with re-anastomosis indicate that this system offers levels of performance and efficacy that match those of conventional wired stimulators, but without the need to extend the operative period or to extract the device hardware.
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Affiliation(s)
- Hexia Guo
- Department of Materials Science and Engineering, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Dom D'Andrea
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Chicago, IL 60611, USA
| | - Jie Zhao
- Department of Materials Science and Engineering, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science, Fudan University, Shanghai, 200433, China
| | - Yue Xu
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Zheng Qiao
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Lindsay E Janes
- Department of Physical Medicine and Rehabilitation, Neurological Surgery, Division of Plastic and Reconstructive Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Nikhil K Murthy
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Department of Neurological Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Rui Li
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian 116024, China
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian 116024, China
| | - Zhen Song
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian 116024, China
| | - Rohan Meda
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Chicago, IL 60611, USA
| | - Jahyun Koo
- Department of Materials Science and Engineering, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- School of Biomedical Engineering, Interdisciplinary Program in precision Public Health, Korea University, Seoul 02841, Republic of Korea
| | - Wubin Bai
- Department of Materials Science and Engineering, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Yeon Sik Choi
- Department of Materials Science and Engineering, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Sumanas W Jordan
- Biologics, Shirley Ryan AbilityLab, Division of Plastic and Reconstructive Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Yonggang Huang
- Department of Civil and Environmental Engineering, Mechanical Engineering, Materials Science and Engineering, Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Colin K Franz
- Laboratory of Regenerative Rehabilitation, Shirley Ryan AbilityLab, Department of Physical Medicine and Rehabilitation, The Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - John A Rogers
- Department of Materials Science and Engineering, Biomedical Engineering, Neurological Surgery, Chemistry, Mechanical Engineering, Electrical and Computer Engineering, Center for Bio-integrated Electronics, Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
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18
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Ahn D, Lee GJ, Choi YS, Park JW, Kim JK, Kim EJ, Lee YH. Timing and clinical outcomes of tracheostomy in patients with COVID-19. Br J Surg 2021; 108:e27-e28. [PMID: 33640938 PMCID: PMC7799185 DOI: 10.1093/bjs/znaa064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 10/05/2020] [Indexed: 01/06/2023]
Abstract
In this retrospective multicentre cohort study that included 27 COVID-19 patients who underwent tracheostomy, the mean time between intubation and tracheostomy was 15.8 days and the negative conversion time of COVID-19 was 43.1 days. Eleven patients (40.7%) died of COVID-19 and the use of percutaneous dilatation tracheostomy was significantly associated with in-hospital death. Timely tracheostomy could be performed in COVID-19 patients, regardless of duration of intubation or positivity of COVID-19 test, with an open surgical tracheostomy as a preferable technique.
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Affiliation(s)
- D Ahn
- Department of Otolaryngology-Head and Neck Surgery, Kyungpook National University, Daegu, Korea
| | - G J Lee
- Department of Otolaryngology-Head and Neck Surgery, Kyungpook National University, Daegu, Korea
| | - Y S Choi
- Department of Otolaryngology-Head and Neck Surgery, Yeungnam University, Daegu, Korea
| | - J W Park
- Department of Otolaryngology-Head and Neck Surgery, Keimyung University, Daegu, Korea
| | - J K Kim
- Department of Otolaryngology-Head and Neck Surgery, Catholic University of Daegu, Daegu, Korea
| | - E J Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Catholic University of Daegu, Daegu, Korea
| | - Y H Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Kyungpook National University, Daegu, Korea
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19
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Choi YS, Hsueh YY, Koo J, Yang Q, Avila R, Hu B, Xie Z, Lee G, Ning Z, Liu C, Xu Y, Lee YJ, Zhao W, Fang J, Deng Y, Lee SM, Vázquez-Guardado A, Stepien I, Yan Y, Song JW, Haney C, Oh YS, Liu W, Yoon HJ, Banks A, MacEwan MR, Ameer GA, Ray WZ, Huang Y, Xie T, Franz CK, Li S, Rogers JA. Stretchable, dynamic covalent polymers for soft, long-lived bioresorbable electronic stimulators designed to facilitate neuromuscular regeneration. Nat Commun 2020; 11:5990. [PMID: 33239608 PMCID: PMC7688647 DOI: 10.1038/s41467-020-19660-6] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/19/2020] [Indexed: 11/28/2022] Open
Abstract
Bioresorbable electronic stimulators are of rapidly growing interest as unusual therapeutic platforms, i.e., bioelectronic medicines, for treating disease states, accelerating wound healing processes and eliminating infections. Here, we present advanced materials that support operation in these systems over clinically relevant timeframes, ultimately bioresorbing harmlessly to benign products without residues, to eliminate the need for surgical extraction. Our findings overcome key challenges of bioresorbable electronic devices by realizing lifetimes that match clinical needs. The devices exploit a bioresorbable dynamic covalent polymer that facilitates tight bonding to itself and other surfaces, as a soft, elastic substrate and encapsulation coating for wireless electronic components. We describe the underlying features and chemical design considerations for this polymer, and the biocompatibility of its constituent materials. In devices with optimized, wireless designs, these polymers enable stable, long-lived operation as distal stimulators in a rat model of peripheral nerve injuries, thereby demonstrating the potential of programmable long-term electrical stimulation for maintaining muscle receptivity and enhancing functional recovery.
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Affiliation(s)
- Yeon Sik Choi
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yuan-Yu Hsueh
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 70456, Taiwan
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, 70456, Taiwan
| | - Jahyun Koo
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - Quansan Yang
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Raudel Avila
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Buwei Hu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian, University of Technology, 116024, Dalian, China
- Department of Engineering Mechanics, Dalian University of Technology, 116024, Dalian, China
- International Research Center for Computational Mechanics, Dalian University of Technology, 116024, Dalian, China
| | - Geumbee Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
| | - Zheng Ning
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Claire Liu
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yameng Xu
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Young Joong Lee
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
| | - Weikang Zhao
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jun Fang
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Yujun Deng
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, China
| | - Seung Min Lee
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
| | - Abraham Vázquez-Guardado
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Iwona Stepien
- Center for Developmental Therapeutics, Chemistry Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
| | - Ying Yan
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Joseph W Song
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Chad Haney
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, 60208, USA
| | - Yong Suk Oh
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
| | - Wentai Liu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Hong-Joon Yoon
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Anthony Banks
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA
| | - Matthew R MacEwan
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Guillermo A Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Wilson Z Ray
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Colin K Franz
- Regenerative Neurorehabilitation Laboratory, Biologics, Shirley Ryan AbilityLab, Chicago, IL, 60611, USA
- Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Song Li
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
| | - John A Rogers
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA.
- Querrey Simpson Institute for Biotechnology, Northwestern University, Evanston, IL, 60208, USA.
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA.
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20
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Kim YD, Choi YS, Na HG, Song SY, Bae CH. Ginsenoside Rb1 attenuates LPS-induced MUC5AC expression via the TLR4-mediated ERK1/2 and NF-κB pathway in human airway epithelial NCI-H292 cells. J BIOL REG HOMEOS AG 2020; 34:613-618. [PMID: 32512990 DOI: 10.23812/19-420-l-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Y D Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea.,Regional Center for Respiratory Diseases, Yeungnam University Medical Center, Daegu, Republic of Korea
| | - Y S Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - H G Na
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - S Y Song
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - C H Bae
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
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21
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Koo J, Kim SB, Choi YS, Xie Z, Bandodkar AJ, Khalifeh J, Yan Y, Kim H, Pezhouh MK, Doty K, Lee G, Chen YY, Lee SM, D’Andrea D, Jung K, Lee K, Li K, Jo S, Wang H, Kim JH, Kim J, Choi SG, Jang WJ, Oh YS, Park I, Kwak SS, Park JH, Hong D, Feng X, Lee CH, Banks A, Leal C, Lee HM, Huang Y, Franz CK, Ray WZ, MacEwan M, Kang SK, Rogers JA. Wirelessly controlled, bioresorbable drug delivery device with active valves that exploit electrochemically triggered crevice corrosion. Sci Adv 2020; 6:eabb1093. [PMID: 32923633 PMCID: PMC7455185 DOI: 10.1126/sciadv.abb1093] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 07/17/2020] [Indexed: 05/18/2023]
Abstract
Implantable drug release platforms that offer wirelessly programmable control over pharmacokinetics have potential in advanced treatment protocols for hormone imbalances, malignant cancers, diabetic conditions, and others. We present a system with this type of functionality in which the constituent materials undergo complete bioresorption to eliminate device load from the patient after completing the final stage of the release process. Here, bioresorbable polyanhydride reservoirs store drugs in defined reservoirs without leakage until wirelessly triggered valve structures open to allow release. These valves operate through an electrochemical mechanism of geometrically accelerated corrosion induced by passage of electrical current from a wireless, bioresorbable power-harvesting unit. Evaluations in cell cultures demonstrate the efficacy of this technology for the treatment of cancerous tissues by release of the drug doxorubicin. Complete in vivo studies of platforms with multiple, independently controlled release events in live-animal models illustrate capabilities for control of blood glucose levels by timed delivery of insulin.
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Affiliation(s)
- Jahyun Koo
- School of Biomedical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sung Bong Kim
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yeon Sik Choi
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Zhaoqian Xie
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian 116024, China
| | - Amay J. Bandodkar
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Jawad Khalifeh
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Ying Yan
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hojun Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | | | - Karen Doty
- Department of Comparative Biosciences Histology Service Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Geumbee Lee
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Yu-Yu Chen
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Seung Min Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Dominic D’Andrea
- Regenerative Neurorehabilitation Laboratory, Shirley Ryan Ability Lab, Chicago, IL 60611, USA
| | - Kimin Jung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science Technology, Daejeon 34141, Republic of Korea
| | - KunHyuck Lee
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Kan Li
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Seongbin Jo
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Heling Wang
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Jae-Hwan Kim
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jeonghyun Kim
- Department of Electronics Convergence Engineering, Kwangwoon University, Nowon-gu, Seoul 01897, Republic of Korea
| | - Sung-Geun Choi
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Woo Jin Jang
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yong Suk Oh
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Inkyu Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sung Soo Kwak
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Ji-Hyeon Park
- Korea Institute of Ceramic Engineering and Technology, 15-5, Chungmugong-dong, Jinju-si, Gyeongsangnam-do 52851, Republic of Korea
| | - Doosun Hong
- Department of Materials Science and Engineering, Korea Advanced Institute of Science Technology, Daejeon 34141, Republic of Korea
| | - Xue Feng
- AML, Department of Engineering Mechanics, Center for Mechanics and Materials, Tsinghua University, Beijing 100084, China
| | - Chi-Hwan Lee
- Weldon School of Biomedical Engineering and School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Anthony Banks
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Cecilia Leal
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Hyuck Mo Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science Technology, Daejeon 34141, Republic of Korea
| | - Yonggang Huang
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Colin K. Franz
- Regenerative Neurorehabilitation Laboratory, Shirley Ryan Ability Lab, Chicago, IL 60611, USA
- Departments of Physical Medicine and Rehabilitation, and Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Wilson Z. Ray
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
- Department of Biomedical Engineering, Washington University, St. Louis, MO 63110, USA
| | - Matthew MacEwan
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
- Department of Biomedical Engineering, Washington University, St. Louis, MO 63110, USA
- Corresponding author. (J.A.R.); (S.-K.K.); (M.M.)
| | - Seung-Kyun Kang
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
- Corresponding author. (J.A.R.); (S.-K.K.); (M.M.)
| | - John A. Rogers
- Department of Materials Science Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Feinberg School of Medicine, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA
- Corresponding author. (J.A.R.); (S.-K.K.); (M.M.)
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22
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Kwak S, Choi YS, Na HG, Bae CH, Song SY, Kim YD. Fipronil upregulates inflammatory cytokines and MUC5AC expression in human nasal epithelial cells. Rhinology 2020; 58:66-73. [PMID: 31680128 DOI: 10.4193/rhin19.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Airway inflammation and excessive mucin production are pathophysiological characteristics of airway diseases. Fipronil, a pesticide, is being extensively used in agriculture and veterinary medicine worldwide. However, this compound impairs immune function in non-target organisms. The present study aimed to evaluate the effect of fipronil on pro-inflammatory cytokine and mucus production and signalling pathways in human primary nasal METHODOLOGY: The effect of fipronil on pro-inflammatory cytokine and MUC5AC expression and the signalling pathway of fipronil were investigated using real-time PCR, enzyme immunoassays, immunofluorescence, and immunoblot analysis with specific inhibitors and small interfering RNA. RESULTS Fipronil treatment increased pro-inflammatory cytokine interleukin (IL)-1beta, IL-6, IL-8, and MUC5AC expression in human primary nasal epithelial cells. It also induced phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2) mitogenactivated protein kinase (MAPK), p38 MAPK, and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB). MAPK and NF-kB inhibitor treatment significantly inhibited increases in IL-1beta, IL-6, IL-8, and MUC5AC expression. Ex vivo data confirmed that fipronil-induced MUC5AC expression occurs through ERK1/2, p38, and NF-kB signalling pathways in nasal inferior turbinate tissue. CONCLUSIONS Fipronil induced pro-inflammatory cytokine IL-1beta, IL-6, IL-8, and MUC5AC expression via ERK1/2 MAPK, p38 MAPK, and NF-kB in human primary nasal epithelial cells.
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Affiliation(s)
- S Kwak
- Department of Medical Science, College of Medicine, Graduate School of Yeungnam University, Daegu, Republic of Korea; Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Y S Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - H G Na
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - C H Bae
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - S-Y Song
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Y-D Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea; Regional Center for Respiratory Diseases, Yeungnam University Medical Center, Daegu, Republic of Korea
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Choi YS, Kim SK, Smith M, Williams F, Vickers ME, Elliott JA, Kar-Narayan S. Unprecedented dipole alignment in α-phase nylon-11 nanowires for high-performance energy-harvesting applications. Sci Adv 2020; 6:eaay5065. [PMID: 32577503 PMCID: PMC7286685 DOI: 10.1126/sciadv.aay5065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
Dipole alignment in ferroelectric polymers is routinely exploited for applications in charge-based applications. Here, we present the first experimental realization of ideally ordered dipole alignment in α-phase nylon-11 nanowires. This is an unprecedented discovery as dipole alignment is typically only ever achieved in ferroelectric polymers using an applied electric field, whereas here, we achieve dipole alignment in as-fabricated nanowires of 'non-ferroelectric' α-phase nylon-11, an overlooked polymorph of nylon proposed 30 years ago but never practically realized. We show that the strong hydrogen bonding in α-phase nylon-11 serves to enhance the molecular ordering, resulting in exceptional intensity and thermal stability of surface potential. This discovery has profound implications for the field of triboelectric energy harvesting, as the presence of an enhanced surface potential leads to higher mechanical energy harvesting performance. Our approach therefore paves the way towards achieving robust, high-performance mechanical energy harvesters based on this unusual ordered phase of nylon-11.
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Do SH, Lee CH, Kihara T, Choi YS, Yoon S, Kim K, Cheong H, Chen WT, Chou F, Nojiri H, Choi KY. Randomly Hopping Majorana Fermions in the Diluted Kitaev System α-Ru_{0.8}Ir_{0.2}Cl_{3}. Phys Rev Lett 2020; 124:047204. [PMID: 32058744 DOI: 10.1103/physrevlett.124.047204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/09/2019] [Indexed: 06/10/2023]
Abstract
dc and ac magnetic susceptibility, magnetization, specific heat, and Raman scattering measurements are combined to probe low-lying spin excitations in α-Ru_{1-x}Ir_{x}Cl_{3} (x≈0.2), which realizes a disordered spin liquid. At intermediate energies (ℏω>3 meV), Raman spectroscopy evidences linearly ω-dependent Majorana-like excitations, obeying Fermi statistics. This points to robustness of a Kitaev paramagnetic state under spin vacancies. At low energies below 3 meV, we observe power-law dependences and quantum-critical-like scalings of the thermodynamic quantities, implying the presence of a weakly divergent low-energy density of states. This scaling phenomenology is interpreted in terms of the random hoppings of Majorana fermions. Our results demonstrate an emergent hierarchy of spin excitations in a diluted Kitaev honeycomb system subject to spin vacancies and bond randomness.
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Affiliation(s)
- Seung-Hwan Do
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - C H Lee
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - T Kihara
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
| | - Y S Choi
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Sungwon Yoon
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Kangwon Kim
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
| | - Hyeonsik Cheong
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
| | - Wei-Tin Chen
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Fangcheng Chou
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Taiwan Consortium of Emergent Crystalline Materials, Ministry of Science and Technology, Taipei 10622, Taiwan
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
| | - Kwang-Yong Choi
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
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Kim DH, Kim JH, Oh YW, Seo BH, Suh HS, Choi YS. Scleredema adultorum of Buschke treated by extracorporeal shock wave therapy. J Eur Acad Dermatol Venereol 2019; 34:e133-e135. [PMID: 31733081 DOI: 10.1111/jdv.16086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D H Kim
- Department of Dermatology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - J H Kim
- Department of Dermatology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Y W Oh
- Department of Dermatology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - B H Seo
- Department of Dermatology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - H S Suh
- Department of Dermatology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Y S Choi
- Department of Dermatology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
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26
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Choi YS, Lee CH, Lee S, Yoon S, Lee WJ, Park J, Ali A, Singh Y, Orain JC, Kim G, Rhyee JS, Chen WT, Chou F, Choi KY. Exotic Low-Energy Excitations Emergent in the Random Kitaev Magnet Cu_{2}IrO_{3}. Phys Rev Lett 2019; 122:167202. [PMID: 31075021 DOI: 10.1103/physrevlett.122.167202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/17/2019] [Indexed: 06/09/2023]
Abstract
We report on magnetization M(H), dc and ac magnetic susceptibility χ(T), specific heat C_{m}(T) and muon spin relaxation (μSR) measurements of the Kitaev honeycomb iridate Cu_{2}IrO_{3} with quenched disorder. In spite of the chemical disorders, we find no indication of spin glass down to 260 mK from the C_{m}(T) and μSR data. Furthermore, a persistent spin dynamics observed by the zero-field muon spin relaxation evidences an absence of static magnetism. The remarkable observation is a scaling relation of χ[H,T] and M[H,T] in H/T with the scaling exponent α=0.26-0.28, expected from bond randomness. However, C_{m}[H,T]/T disobeys the predicted universal scaling law, pointing towards the presence of additional low-lying excitations on the background of bond-disordered spin liquid. Our results signify a many-faceted impact of quenched disorder in a Kitaev spin system due to its peculiar bond character.
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Affiliation(s)
- Y S Choi
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - C H Lee
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - S Lee
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Sungwon Yoon
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - W-J Lee
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - J Park
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Anzar Ali
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, S. A. S. Nagar, Manauli 140306, India
| | - Yogesh Singh
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, S. A. S. Nagar, Manauli 140306, India
| | - Jean-Christophe Orain
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Gareoung Kim
- Department of Applied Physics, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Jong-Soo Rhyee
- Department of Applied Physics, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Wei-Tin Chen
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Fangcheng Chou
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Taiwan Consortium of Emergent Crystalline Materials, Ministry of Science and Technology, Taipei 10622, Taiwan
| | - Kwang-Yong Choi
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
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Abstract
Background Among active-duty military personnel, lower limb musculoskeletal injuries and related conditions (injuries) frequently arise as unintended consequences of physical training. These injuries are particularly common among women. The practical impact of such injuries on temporary military occupational disability has not been estimated with precision on a large scale. Aims To determine the proportion of service time compromised by limited duty days attributable to lower limb injuries, characterize the time affected by these limitations in terms of specific lower limb region and compare the limited duty time between male and female soldiers. Methods Administrative data and individual limited duty assignments (profiles) were obtained for active-duty US Army personnel who served in 2014. Lower limb injury-related profiles were used to calculate the percent of person-time requiring duty limitations by gender and body region. Results The study group was 568 753 soldiers of whom 14% were women. Nearly 13% of service days for active-duty US Army soldiers required limited duty for lower limb injuries during 2014. Knee injuries were responsible for 45% of those days. Within integrated military occupations, female soldiers experienced 27-57% more time on limited duty for lower limb injuries compared with men. Conclusions The substantial amount of limited duty for lower limb musculoskeletal injuries among soldiers highlights the need for improvement in training-related injury screening, prevention and timely treatment with particular attention to knee injuries. The excessive impact of lower limb injuries on female soldiers' occupational functions should be a surveillance priority in the current environment of expanding gender-integrated training.
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Affiliation(s)
- K K Holsteen
- Department of Health Research and Policy, Stanford University School of Medicine, USA
| | - Y S Choi
- Departments of Medicine and Pediatrics, Womack Army Medical Center, USA
| | - S A Bedno
- Department of Preventive Medicine, Womack Army Medical Center, USA
| | - D A Nelson
- Department of Medicine, Division of Primary Care and Population Health, Stanford University School of Medicine, Medical School Office Building (MSOB), USA
| | - L M Kurina
- Department of Medicine, Division of Primary Care and Population Health, Stanford University School of Medicine, Medical School Office Building (MSOB), USA
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Kim MJ, Shin JY, Oh JA, Jeong KE, Choi YS, Park Q, Song MS, Lee DH. Identification of transfusion-transmitted hepatitis A through postdonation information in Korea: results of an HAV lookback (2007-2012). Vox Sang 2018; 113:547-554. [PMID: 30003551 DOI: 10.1111/vox.12672] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 05/03/2018] [Accepted: 05/10/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES Despite safety measures to minimize the risk of transfusion-transmitted infections, a residual risk remains. To trace and review some such cases, we ask donors to notify the blood centre if they are diagnosed with an infection after they donate blood. MATERIALS AND METHODS We analysed all data on postdonation cases of hepatitis A reported between 2007 and 2012. Archived specimens from these donors were tested for hepatitis A virus (HAV) using anti-HAV IgM/IgG and HAV-PCR as markers. If any of the test results were positive, we reviewed the medical records of the recipients and, if necessary, tested them for hepatitis A. RESULTS Fifteen blood donors notified the blood centres of having been diagnosed with hepatitis A after donation. All archived samples except for one were HAV-PCR-positive and anti-HAV IgM/IgG-negative. Of the donated components, four RBCs and 14 FFPs had not been transfused to patients and were recalled. Among 26 recipients of the implicated components, fourteen were still alive when they were notified. Two patients showed clinical symptoms of hepatitis A and had positive results with anti-HAV IgM. CONCLUSION Transfusion-transmitted hepatitis A is rare but exists. To reduce the risk, donors should be told to notify the blood centre if they are diagnosed with blood-borne diseases after they donate blood. Physicians should consider the possibility of transfusion-transmitted hepatitis A if a transfused patient has hepatitis A but no history of travel or route of faecal-oral infection.
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Affiliation(s)
- M J Kim
- Department of Laboratory Medicine, Myongji Hospital, Goyang, Korea
| | - J Y Shin
- Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Osong, Korea
| | - J A Oh
- Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Osong, Korea
| | - K E Jeong
- Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Osong, Korea
| | - Y S Choi
- Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Osong, Korea
| | - Q Park
- Armed Forces Medical Research Institute, Daejeon, Korea
| | - M S Song
- Department of Nursing, Konyang University College of Nursing, Daejeon, Korea
| | - D H Lee
- Division of Infectious Disease Surveillance, Korea Centers for Disease Control and Prevention, Osong, Korea
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Choi YS, Kim SK, Williams F, Calahorra Y, Elliott JA, Kar-Narayan S. The effect of crystal structure on the electromechanical properties of piezoelectric Nylon-11 nanowires. Chem Commun (Camb) 2018; 54:6863-6866. [PMID: 29855641 PMCID: PMC6009497 DOI: 10.1039/c8cc02530d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 05/02/2018] [Indexed: 11/25/2022]
Abstract
Crystal structure is crucial in determining the properties of piezoelectric polymers, particularly at the nanoscale where precise control of the crystalline phase is possible. Here, we investigate the electromechanical properties of three distinct crystalline phases of Nylon-11 nanowires using advanced scanning probe microscopy techniques. Stiff α-phase nanowires exhibited a low piezoelectric response, while relatively soft δ'-phase nanowires displayed an enhanced piezoelectric response.
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Affiliation(s)
- Yeon Sik Choi
- Department of Materials Science and Metallurgy
, University of Cambridge
,
27 Charles Babbage Road
, Cambridge CB3 0FS
, UK
.
| | - Sung Kyun Kim
- Department of Materials Science and Metallurgy
, University of Cambridge
,
27 Charles Babbage Road
, Cambridge CB3 0FS
, UK
.
| | - Findlay Williams
- Department of Materials Science and Metallurgy
, University of Cambridge
,
27 Charles Babbage Road
, Cambridge CB3 0FS
, UK
.
| | - Yonatan Calahorra
- Department of Materials Science and Metallurgy
, University of Cambridge
,
27 Charles Babbage Road
, Cambridge CB3 0FS
, UK
.
| | - James A. Elliott
- Department of Materials Science and Metallurgy
, University of Cambridge
,
27 Charles Babbage Road
, Cambridge CB3 0FS
, UK
.
| | - Sohini Kar-Narayan
- Department of Materials Science and Metallurgy
, University of Cambridge
,
27 Charles Babbage Road
, Cambridge CB3 0FS
, UK
.
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Park YW, Han K, Ahn SS, Choi YS, Chang JH, Kim SH, Kang SG, Kim EH, Lee SK. Whole-Tumor Histogram and Texture Analyses of DTI for Evaluation of IDH1-Mutation and 1p/19q-Codeletion Status in World Health Organization Grade II Gliomas. AJNR Am J Neuroradiol 2018. [PMID: 29519794 DOI: 10.3174/ajnr.a5569] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND PURPOSE Prediction of the isocitrate dehydrogenase 1 (IDH1)-mutation and 1p/19q-codeletion status of World Health Organization grade ll gliomas preoperatively may assist in predicting prognosis and planning treatment strategies. Our aim was to characterize the histogram and texture analyses of apparent diffusion coefficient and fractional anisotropy maps to determine IDH1-mutation and 1p/19q-codeletion status in World Health Organization grade II gliomas. MATERIALS AND METHODS Ninety-three patients with World Health Organization grade II gliomas with known IDH1-mutation and 1p/19q-codeletion status (18 IDH1 wild-type, 45 IDH1 mutant and no 1p/19q codeletion, 30 IDH1-mutant and 1p/19q codeleted tumors) underwent DTI. ROIs were drawn on every section of the T2-weighted images and transferred to the ADC and the fractional anisotropy maps to derive volume-based data of the entire tumor. Histogram and texture analyses were correlated with the IDH1-mutation and 1p/19q-codeletion status. The predictive powers of imaging features for IDH1 wild-type tumors and 1p/19q-codeletion status in IDH1-mutant subgroups were evaluated using the least absolute shrinkage and selection operator. RESULTS Various histogram and texture parameters differed significantly according to IDH1-mutation and 1p/19q-codeletion status. The skewness and energy of ADC, 10th and 25th percentiles, and correlation of fractional anisotropy were independent predictors of an IDH1 wild-type in the least absolute shrinkage and selection operator. The area under the receiver operating curve for the prediction model was 0.853. The skewness and cluster shade of ADC, energy, and correlation of fractional anisotropy were independent predictors of a 1p/19q codeletion in IDH1-mutant tumors in the least absolute shrinkage and selection operator. The area under the receiver operating curve was 0.807. CONCLUSIONS Whole-tumor histogram and texture features of the ADC and fractional anisotropy maps are useful for predicting the IDH1-mutation and 1p/19q-codeletion status in World Health Organization grade II gliomas.
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Affiliation(s)
- Y W Park
- From the Department of Radiology (Y.W.P.), Ewha Womans University College of Medicine, Seoul, Korea.,Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.S.A., Y.S.C., S.-K.L.)
| | - K Han
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.S.A., Y.S.C., S.-K.L.)
| | - S S Ahn
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.S.A., Y.S.C., S.-K.L.)
| | - Y S Choi
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.S.A., Y.S.C., S.-K.L.)
| | - J H Chang
- Neurosurgery (J.H.C., S.-G.K., E.H.K.)
| | - S H Kim
- Pathology (S.H.K.), Yonsei University College of Medicine, Seoul, Korea
| | - S-G Kang
- Neurosurgery (J.H.C., S.-G.K., E.H.K.)
| | - E H Kim
- Neurosurgery (J.H.C., S.-G.K., E.H.K.)
| | - S-K Lee
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.S.A., Y.S.C., S.-K.L.)
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Park YW, Han K, Ahn SS, Bae S, Choi YS, Chang JH, Kim SH, Kang SG, Lee SK. Prediction of IDH1-Mutation and 1p/19q-Codeletion Status Using Preoperative MR Imaging Phenotypes in Lower Grade Gliomas. AJNR Am J Neuroradiol 2018; 39:37-42. [PMID: 29122763 DOI: 10.3174/ajnr.a5421] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 08/14/2017] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND PURPOSE WHO grade II gliomas are divided into three classes: isocitrate dehydrogenase (IDH)-wildtype, IDH-mutant and no 1p/19q codeletion, and IDH-mutant and 1p/19q-codeleted. Different molecular subtypes have been reported to have prognostic differences and different chemosensitivity. Our aim was to evaluate the predictive value of imaging phenotypes assessed with the Visually AcceSAble Rembrandt Images lexicon for molecular classification of lower grade gliomas. MATERIALS AND METHODS MR imaging scans of 175 patients with lower grade gliomas with known IDH1 mutation and 1p/19q-codeletion status were included (78 grade II and 97 grade III) in the discovery set. MR imaging features were reviewed by using Visually AcceSAble Rembrandt Images (VASARI); their associations with molecular markers were assessed. The predictive power of imaging features for IDH1-wild type tumors was evaluated using the Least Absolute Shrinkage and Selection Operator. We tested the model in a validation set (40 subjects). RESULTS Various imaging features were significantly different according to IDH1 mutation. Nonlobar location, larger proportion of enhancing tumors, multifocal/multicentric distribution, and poor definition of nonenhancing margins were independent predictors of an IDH1 wild type according to the Least Absolute Shrinkage and Selection Operator. The areas under the curve for the prediction model were 0.859 and 0.778 in the discovery and validation sets, respectively. The IDH1-mutant, 1p/19q-codeleted group frequently had mixed/restricted diffusion characteristics and showed more pial invasion compared with the IDH1-mutant, no codeletion group. CONCLUSIONS Preoperative MR imaging phenotypes are different according to the molecular markers of lower grade gliomas, and they may be helpful in predicting the IDH1-mutation status.
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Affiliation(s)
- Y W Park
- From the Department of Radiology (Y.W.P.), Ewha Womans University College of Medicine, Seoul, Korea
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.-K.L., S.B., Y.S.C., S.S.A.)
| | - K Han
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.-K.L., S.B., Y.S.C., S.S.A.)
| | - S S Ahn
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.-K.L., S.B., Y.S.C., S.S.A.)
| | - S Bae
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.-K.L., S.B., Y.S.C., S.S.A.)
| | - Y S Choi
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.-K.L., S.B., Y.S.C., S.S.A.)
| | | | - S H Kim
- Pathology (S.H.K.), Yonsei University College of Medicine, Seoul, Korea
| | | | - S-K Lee
- Departments of Radiology and Research Institute of Radiological Science (Y.W.P., K.H., S.-K.L., S.B., Y.S.C., S.S.A.)
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Hong TH, Cho JH, Shin SM, Kim HK, Choi YS, Zo JI, Shim YM, Kim J. F-063EXTENDED SLEEVE LOBECTOMY FOR CENTRALLY LOCATED NON-SMALL CELL LUNG CANCER: A 20-YEAR SINGLE CENTRE EXPERIENCE. Interact Cardiovasc Thorac Surg 2017. [DOI: 10.1093/icvts/ivx280.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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33
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Shin S, Choi YS, Cho JH, Kim HK, Kim J, Zo JI, Shim YM. F-072PROGNOSTIC IMPACT OF PATHOLOGIC MICROSCOPIC LYMPHOVASCULAR INVASION IN COMPLETELY RESECTED EARLY STAGE NON-SMALL CELL LUNG CANCER: IMPLICATION TO THE T DESCRIPTOR. Interact Cardiovasc Thorac Surg 2017. [DOI: 10.1093/icvts/ivx280.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Pyeon HI, Bak J, Seok JI, Choi YS. Therapeutic application of wet-ground bee pollen in benign prostatic hyperplasia. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- HI Pyeon
- Catholic University Of Daegu, Gyeongsangbukdo, Korea, Republic of (South)
| | - J Bak
- Catholic University Of Daegu, Gyeongsangbukdo, Korea, Republic of (South)
| | - JI Seok
- Catholic University Of Daegu, Gyeongsangbukdo, Korea, Republic of (South)
| | - YS Choi
- Catholic University Of Daegu, Gyeongsangbukdo, Korea, Republic of (South)
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35
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Kim SH, Shin SM, Choi YS, Ko CC, Kim SS, Park SB, Son WS, Kim YI. Morphometric analysis of the maxillary root apex positions according to crowding severity. Orthod Craniofac Res 2017; 20:202-208. [PMID: 28857415 DOI: 10.1111/ocr.12198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To determine differences in arch forms derived from the root apices locations between individuals with <2 mm maxillary crowding and controls. SETTING AND SAMPLE POPULATION The Department of Orthodontics, Pusan National University. Cone-beam computed tomography (CBCT) images of 102 patients in the control group and 95 patients in the crowding group. MATERIALS AND METHODS X, Y and Z coordinates of the tip of the crowns and the apex of the root of the maxillary teeth (except second molars) were determined on the CBCT images. The acquired three-dimensional (3D) coordinates were converted into two-dimensional (2D) coordinates via projection on the palatal plane, and the Procrustes analysis was employed to process the converted 2D coordinates. The mean shape of the arch form derived from the location of the tip of the crowns and the apex of the root was compared between groups using the statistical shape analysis. RESULTS There was a statistically significant difference (P = .046) between the groups for the mean shape of the root apex arch form, but the difference was small and clinically irrelevant as it is minor compared to the degree of crowding. CONCLUSIONS Maxillary arch from at the level of the maxillary apices only shows minor differences between crowded and non-crowded dentitions.
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Affiliation(s)
- S H Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea
| | - S M Shin
- Department of Statistics, College of Natural Science, Pusan National University, Busan, South Korea
| | - Y S Choi
- Department of Statistics, College of Natural Science, Pusan National University, Busan, South Korea
| | - C C Ko
- Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - S S Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea
| | - S B Park
- Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea
| | - W S Son
- Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea
| | - Y-I Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea.,Institute of Translational Dental Sciences, Pusan National University, Yangsan, South Korea
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Choi YS, Ahn SS, Lee HJ, Chang JH, Kang SG, Kim EH, Kim SH, Lee SK. The Initial Area Under the Curve Derived from Dynamic Contrast-Enhanced MRI Improves Prognosis Prediction in Glioblastoma with Unmethylated MGMT Promoter. AJNR Am J Neuroradiol 2017. [PMID: 28642265 DOI: 10.3174/ajnr.a5265] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND PURPOSE Although perfusion and permeability MR parameters have known to have prognostic value, they have reproducibility issues. Our aim was to evaluate whether the initial area under the time-to-signal intensity curve (IAUC) derived from dynamic contrast-enhanced MR imaging can improve prognosis prediction in patients with glioblastoma with known MGMT status. MATERIALS AND METHODS We retrospectively examined 88 patients with glioblastoma who underwent preoperative dynamic contrast-enhanced MR imaging. The means of IAUC values at 30 and 60 seconds (IAUC30mean and IAUC60mean) were extracted from enhancing tumors. The prognostic values of IAUC parameters for overall survival and progression-free survival were assessed with log-rank tests, according to the MGMT status. Multivariate overall survival and progression-free survival models before and after adding the IAUC parameters as covariates were explored by net reclassification improvement after receiver operating characteristic analysis for 1.5-year overall survival and 1-year progression-free survival and by random survival forest. RESULTS High IAUC parameters were associated with worse overall survival and progression-free survival in the unmethylated MGMT group, but not in the methylated group. In the unmethylated MGMT group, 1.5-year overall survival and 1-year progression-free survival prediction improved significantly after adding IAUC parameters (overall survival area under the receiver operating characteristic curve, 0.86; progression-free survival area under the receiver operating characteristic curve, 0.74-0.76) to the model with other prognostic factors (overall survival area under the receiver operating characteristic curve, 0.81; progression-free survival area under the receiver operating characteristic curve, 0.69; P < .05 for all) except in the case of IAUC60mean for 1-year progression-free survival prediction (P = .059). Random survival forest models indicated that the IAUC parameters were the second or most important predictors in the unmethylated MGMT group, except in the case of the IAUC60mean for progression-free survival. CONCLUSIONS IAUC can be a useful prognostic imaging biomarker in patients with glioblastoma with known MGMT status, improving prediction of glioblastoma prognosis with the unmethylated MGMT promoter status.
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Affiliation(s)
- Y S Choi
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., H.-J.L., S.-K.L.)
| | - S S Ahn
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., H.-J.L., S.-K.L.)
| | - H-J Lee
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., H.-J.L., S.-K.L.)
| | - J H Chang
- Neurosurgery (J.H.C., S.-G.K., E.H.K.), Yonsei University College of Medicine, Seoul, Korea
| | - S-G Kang
- Neurosurgery (J.H.C., S.-G.K., E.H.K.), Yonsei University College of Medicine, Seoul, Korea
| | - E H Kim
- Neurosurgery (J.H.C., S.-G.K., E.H.K.), Yonsei University College of Medicine, Seoul, Korea
| | - S H Kim
- Departments of Pathology (S.H.K.)
| | - S-K Lee
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., H.-J.L., S.-K.L.)
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Choi YS, Lee EJ, Cho Y. The effect of Korean-group cognitive behavioural therapy among patients with panic disorder in clinic settings. J Psychiatr Ment Health Nurs 2017; 24:28-40. [PMID: 27774709 DOI: 10.1111/jpm.12337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/18/2016] [Indexed: 11/29/2022]
Abstract
UNLABELLED WHAT IS KNOWN ON THE SUBJECT?: Panic disorder patients display various panic-related physical symptoms and catastrophic misinterpretation of bodily sensations, which lower their quality of life by interfering with daily activities. Cognitive behavioural therapy (CBT) is a useful strategy for panic disorder patients to manage symptoms associated with inaccurate cognitive interpretation of situations resulting from the patient's cognitive vulnerability. In South Korea, however, despite the increasing prevalence of panic disorder, CBT is not a common element of nursing care plans for panic disorder patients. Moreover, few Korean researchers have attempted to assess the effects of CBT on such patients. WHAT THIS PAPER ADD TO EXISTING KNOWLEDGE?: In a strategy combining CBT and routine treatments, patients with panic disorder can experience greater positive effects in the acute treatment phase than those they experience when receiving only routine treatment. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: Mental health professionals, especially psychiatric nurses in local clinics who operate most special mental health programmes for panic disorder patients, should apply a panic disorder management programme that integrates CBT and routine treatments. The integrated approach is more effective for reducing the number of panic attacks and cognitive misinterpretation in patients than providing routine treatment alone. For patients with panic disorder, the objective of CBT is to understand the relationship between psychological panic disorder sensations, emotions, thoughts and behaviours. Therefore, nurses can help patients address and improve biological, social and psychological aspects of physical health problems as well as help them improve their coping skills in general. ABSTRACT Introduction In panic disorder, sensitivity to bodily sensations increases due to the patient's cognitive vulnerability. Cognitive behavioural therapy (CBT) can help to decrease sensitivity to bodily sensations by correcting these cognitive distortions by controlling negative thoughts and panic attacks. Aims This study verified whether group CBT is more effective than treatment as usual (TAU) in South Korean patients with panic disorder. Methods The study participants consisted of 76 panic disorder patients. Patients in the therapy condition attended sessions once a week for a total of 12 sessions in addition to drug treatment. Results In the therapy condition, there were significant decreases in panic-related bodily sensations and ranking and belief scores for catastrophic misinterpretation of external events. Discussion Group CBT, in comparison to TAU, decreases panic and agoraphobia symptom severity in South Korean patients with panic disorder. Our study provides evidence for the effectiveness of a panic disorder management programme that integrates group CBT and traditional pharmacotherapeutic treatment for patients with panic disorder. Implications for Practice The cognitive behavioural approach is needed to reduce panic and agoraphobia symptoms for hospitalized patients with panic disorder more than activity therapies, medications and supportive counselling by doctors and nurses.
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Affiliation(s)
- Y S Choi
- Department of Nursing, Andong Science College, Andong, South Korea
| | - E J Lee
- College of Nursing, Keimyung University, Deagu, South Korea
| | - Y Cho
- Department of Psychology, Hallym University, Chuncheon, South Korea
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Kim MK, Chon SJ, Noe EB, Roh YH, Yun BH, Cho S, Choi YS, Lee BS, Seo SK. Associations of dietary calcium intake with metabolic syndrome and bone mineral density among the Korean population: KNHANES 2008-2011. Osteoporos Int 2017; 28:299-308. [PMID: 27503170 DOI: 10.1007/s00198-016-3717-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
Abstract
UNLABELLED Excessive amount of calcium intake increased risk for metabolic syndrome in men. However, modest amount decreased the risk of metabolic syndrome and osteoporosis in postmenopausal women. Modest amount of calcium also increased bone mineral density (BMD) in both men and postmenopausal women. INTRODUCTION The present study aimed to evaluate the associations of dietary calcium intake with metabolic syndrome and bone mineral density (BMD) in Korean men and women, especially postmenopausal women. METHODS The study was performed using data from the Korean National Health and Nutrition Examination Survey (2008-2011) and included 14,705 participants (5953 men, 4258 premenopausal women, and 4494 postmenopausal women). Clinical and other objective characteristics, presence of metabolic syndrome, and the BMD of the femur neck and lumbar spine were evaluated according to dietary calcium intake. RESULTS There was a higher tendency for metabolic syndrome in men with a dietary calcium intake of >1200 mg/day than with ≤400 mg of calcium intake; >400 and ≤800 mg of calcium intake was helpful for postmenopausal women to decrease risk for metabolic syndrome. Overall, the group with calcium intake >400 and ≤800 mg daily had significantly increased BMD in both femoral neck and lumbar spine from both men and postmenopausal women. From both femoral neck and lumbar spine, the prevalence of osteoporosis in postmenopausal women significantly decreased in the group whose calcium intake was >400 and ≤800 mg daily. CONCLUSION Excessive dietary calcium may increase the prevalence of metabolic syndrome in men. For postmenopausal women, calcium intake does not increase the risk of metabolic syndrome, but modest amount decreases the risk. It may increase the BMD in men and postmenopausal women, and also reduce the prevalence of both osteoporosis and metabolic syndrome in postmenopausal women.
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Affiliation(s)
- M K Kim
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S J Chon
- Department of Obstetrics and Gynecology, Gil Hospital, Gachon University College of Medicine, Incheon, Republic of Korea
| | - E B Noe
- Seoul Rachel Fertility Center, Seoul, Republic of Korea
| | - Y H Roh
- Biostatistics Collaboration Unit, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - B H Yun
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S Cho
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y S Choi
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - B S Lee
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S K Seo
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Seo MH, Won EJ, Hong YJ, Chun S, Kwon JR, Choi YS, Kim JN, Lee SA, Lim AH, Kim SH, Park KU, Cho D. An effective diagnostic strategy for accurate detection of RhD variants including Asian DEL type in apparently RhD-negative blood donors in Korea. Vox Sang 2016; 111:425-430. [PMID: 27864976 DOI: 10.1111/vox.12450] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 08/16/2016] [Accepted: 08/17/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND OBJECTIVES The purpose of this study was to provide an effective RHD genotyping strategy for the East Asian blood donors. MATERIAL AND METHODS RhD phenotyping, weak D testing and RhCE phenotyping were performed on 110 samples from members of the RhD-negative club, private organization composed of RhD-negative blood donors, in the GwangJu-Chonnam region of Korea. The RHD promoter, intron 4, and exons 7 and 10 were analysed by real-time PCR. Two nucleotide changes (c.1227 G>A, and c.1222 T>C) in exon 9 were analysed by sequencing. RESULTS Of 110 RhD-negative club members, 79 (71·8%) showed complete deletion of the RHD gene, 10 (9·1%) showed results consistent with RHD-CE-D hybrid, and 21 (19·1%) showed amplification of RHD promoter, intron 4, and exons 7 and 10. Of the latter group, 16 (14·5%) were in the DEL blood group including c.1227 G>A (N = 14) and c.1222 T>C (N = 2), 2 (1·8%) were weak D, 1(0·9%) was partial D, and 2 (1·8%) were undetermined. The RhD-negative phenotype samples consisted of 58 C-E-c+e+, 19 C-E+c+e+, 3 C-E+c+e-, 21 C+E-c+e-, 6 C+E-c+e+ and 3 C+E-c-e + . Notably, all 58 samples with the C-E-c+e+ phenotype were revealed to have complete deletion of the RHD gene. The C-E-c+e+ phenotype showed 100% positive predictive value for detecting D-negative cases. CONCLUSIONS RHD genotyping is not required in half of D-negative cases. We suggest here an effective RHD genotyping strategy for accurate detection of RhD variants in apparently RhD-negative blood donors in East Asia.
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Affiliation(s)
- M H Seo
- Department of Biomedical Sciences, Chonnam National University, Gwangju, Korea
| | - E J Won
- Department of Laboratory Medicine, Chonnam National University Hospital, Gwangju, Korea
| | - Y J Hong
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - S Chun
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunwan University School of Medicine, Seoul, Korea
| | - J R Kwon
- The Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Cheongwon, Korea
| | - Y S Choi
- The Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Cheongwon, Korea
| | - J N Kim
- The Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Cheongwon, Korea
| | - S A Lee
- Blood Transfusion Research Institute, Korean Red Cross, Wonju, Korea
| | - A H Lim
- Blood Transfusion Research Institute, Korean Red Cross, Wonju, Korea
| | - S H Kim
- Department of Laboratory Medicine, Chonnam National University Hwasun Hospital, Chonnam National University School of Medicine, Gwangju, Korea
| | - K U Park
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - D Cho
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunwan University School of Medicine, Seoul, Korea.,Stem Cell & Regenerative Medicine Institute, Samsung Medical Center, Seoul, Korea
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Yun BH, Chon SJ, Choi YS, Cho S, Lee BS, Seo SK. The effect of prolonged breast-feeding on the development of postmenopausal osteoporosis in population with insufficient calcium intake and vitamin D level. Osteoporos Int 2016; 27:2745-2753. [PMID: 27048389 DOI: 10.1007/s00198-016-3585-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/27/2016] [Indexed: 01/21/2023]
Abstract
UNLABELLED Breast-feeding affects bone metabolism and calcium homeostasis, and prolonged breast-feeding may influence the development of postmenopausal osteoporosis, particularly in highly susceptible populations. The study determined that breast-feeding may be a risk factor for postmenopausal osteoporosis, especially in people with low calcium intakes and vitamin D deficiencies. INTRODUCTION The purpose of this study was to determine whether breast-feeding is a risk factor in the development of postmenopausal osteoporosis, especially in highly susceptible population. METHODS The study was performed using data from the 2010 to 2011 Korea National Health and Nutrition Examination Survey, and it included 1231 postmenopausal women who were aged between 45 and 70 years. Osteoporosis was defined using the World Health Organization's T-score criteria, namely, a T-score of ≤-2.5 at the femoral neck or the lumbar spine. The patients' ages, body mass indexes, daily calcium intakes, serum vitamin D levels, exercise levels, smoking histories, and reproductive factors relating to menarche, menopause, delivery, breast-feeding, hormone treatment, and oral contraceptive use were evaluated. Comparisons between the osteoporosis and non-osteoporosis groups were undertaken using Student's t test and the chi-square test, and logistic regression models were built. RESULTS A significant increase in the risk of osteoporosis was apparent in postmenopausal women with prolonged breast-feeding histories (≥24 months) (model 1: odds ratio [OR] = 2.489; 95 % confidence interval [CI] = 1.111 to 5.578, p = 0.027; model 2: OR = 2.503; 95 % CI = 1.118 to 5.602, p = 0.026; model 3: OR = 2.825; 95 % CI = 1.056 to 7.56, p = 0.039), particularly in those with inadequate serum vitamin D levels and calcium intakes (<800 mg/day). CONCLUSIONS Breast-feeding seems to increase the risk of postmenopausal osteoporosis; however, its impact may not be definitive in women with sufficient vitamin D levels and calcium intakes. Therefore, sufficient calcium intakes and adequate vitamin D levels may be important to prevent osteoporosis in postmenopausal women that is derived from breast-feeding.
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Affiliation(s)
- B H Yun
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - S J Chon
- Department of Obstetrics and Gynecology, Gil Hospital, Graduate School of Medicine, Gachon University of Medicine and Science, Incheon, South Korea
| | - Y S Choi
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - S Cho
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, South Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - B S Lee
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - S K Seo
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, South Korea.
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Abstract
Electromechanical coupling in electroactive polymers (EAPs) has been widely applied for actuation and is also being increasingly investigated for sensing chemical and mechanical stimuli. EAPs are a unique class of materials, with low-moduli high-strain capabilities and the ability to conform to surfaces of different shapes. These features make them attractive for applications such as wearable sensors and interfacing with soft tissues. Here, we review the major types of EAPs and their sensing mechanisms. These are divided into two classes depending on the main type of charge carrier: ionic EAPs (such as conducting polymers and ionic polymer–metal composites) and electronic EAPs (such as dielectric elastomers, liquid-crystal polymers and piezoelectric polymers). This review is intended to serve as an introduction to the mechanisms of these materials and as a first step in material selection for both researchers and designers of flexible/bendable devices, biocompatible sensors or even robotic tactile sensing units.
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Affiliation(s)
- Tiesheng Wang
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK; EPSRC Centre for Doctoral Training in Sensor Technologies and Applications, University of Cambridge, Cambridge CB2 3RA, UK
| | - Meisam Farajollahi
- Advanced Materials and Process Engineering Laboratory , University of British Columbia , Vancouver, British Columbia , Canada V6T 1Z4
| | - Yeon Sik Choi
- Department of Materials Science and Metallurgy , University of Cambridge , Cambridge CB3 0FS , UK
| | - I-Ting Lin
- Department of Materials Science and Metallurgy , University of Cambridge , Cambridge CB3 0FS , UK
| | - Jean E Marshall
- Department of Materials Science and Metallurgy , University of Cambridge , Cambridge CB3 0FS , UK
| | - Noel M Thompson
- Department of Materials Science and Metallurgy , University of Cambridge , Cambridge CB3 0FS , UK
| | - Sohini Kar-Narayan
- Department of Materials Science and Metallurgy , University of Cambridge , Cambridge CB3 0FS , UK
| | - John D W Madden
- Advanced Materials and Process Engineering Laboratory , University of British Columbia , Vancouver, British Columbia , Canada V6T 1Z4
| | - Stoyan K Smoukov
- Department of Materials Science and Metallurgy , University of Cambridge , Cambridge CB3 0FS , UK
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Rim TH, Choi YS, Kim SS, Kang MJ, Oh J, Park S, Byeon SH. Retinal vessel structure measurement using spectral-domain optical coherence tomography. Eye (Lond) 2015; 30:111-9. [PMID: 26493040 DOI: 10.1038/eye.2015.205] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 08/16/2015] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To assess the reliability and validity of spectral-domain optical coherence tomography (SD-OCT) measurements of retinal vessel lumen diameters and wall thicknesses. METHODS SD-OCT was used to characterize the circular region around the optic disc of 40 eyes (20 subjects). The inner and outer sides (vitreal and choroidal sides) of the vessel wall and the luminal diameter were measured using intensity graphs. RESULTS Mean arterial and venous luminal diameters were 95.1±16.1 and 132.6±17.8 μm, respectively. The wall thicknesses of inner and outer sides of the artery were 23.9±4.9 and 21.2±3.5 μm, respectively. The wall thicknesses of the inner and outer sides of the vein were 20.7±4.2 and 16.3±4.3 μm, respectively. There were significant differences between the inner and outer wall thicknesses in both the artery and vein (P<0.01). Intra- and interobserver intraclass correlation coefficients (ICCs) for lumen measurements were >0.95, and for wall thicknesses were >0.85, except for the outer wall thickness measurements. The mean value of outer and inner wall thicknesses showed good reproducibility, with ICCs of >0.85. CONCLUSION Intensity graph-assisted measurements using SD-OCT provided more objective information in finding boundaries of vessels. Luminal diameters and wall thicknesses obtained with OCT showed good overall reproducibility, with inner wall thicknesses being thicker, and with better reproducibility compared with outer wall thicknesses, where ICC values were the lowest among the inner wall thicknesses, mean thicknesses of inner and outer walls, and luminal diameters. When using SD-OCT measurements, caution is therefore advised when using only the outer wall as representative of the wall thicknesses.
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Affiliation(s)
- T H Rim
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Y S Choi
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - S S Kim
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
| | - M-J Kang
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
| | - J Oh
- Department of Cardiology, Severance Cardiovascular Hospital, Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - S Park
- Department of Cardiology, Severance Cardiovascular Hospital, Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - S H Byeon
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
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Suh SW, Choi YS, Lee SE, Kang H. Internal herniation due to an omphalomesenteric duct cyst in a 69-year-old man. Z Gastroenterol 2015; 53:1084-6. [PMID: 26367024 DOI: 10.1055/s-0035-1553340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Previous abdominal surgery is the most common cause of mechanical small bowel obstruction. However, in patients with no history of abdominal surgery, the diagnosis and treatment of mechanical small bowel obstruction is difficult. A persistent omphalomesenteric duct remnant is a rare finding that typically presents in the pediatric population and is extremely rare in patients aged > 60 years. In the present report, we describe the case of an omphalomesenteric duct cyst causing small bowel obstruction in a 69-year-old man with no history of a surgical procedure.
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Affiliation(s)
- S W Suh
- Department of Surgery, Chung Ang University Hospital, Seoul, Korea, Republic of
| | - Y S Choi
- Department of Surgery, Chung Ang University Hospital, Seoul, Korea, Republic of
| | - S E Lee
- Department of Surgery, Chung Ang University Hospital, Seoul, Korea, Republic of
| | - H Kang
- Anesthesiology and Pain Medicine, Chung-Ang University Hospital, Seoul, Korea (the Republic of)
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Choi YS, Kim DW, Lee SK, Chang JH, Kang SG, Kim EH, Kim SH, Rim TH, Ahn SS. The Added Prognostic Value of Preoperative Dynamic Contrast-Enhanced MRI Histogram Analysis in Patients with Glioblastoma: Analysis of Overall and Progression-Free Survival. AJNR Am J Neuroradiol 2015; 36:2235-41. [PMID: 26338911 DOI: 10.3174/ajnr.a4449] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 04/20/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND PURPOSE The prognostic value of dynamic contrast-enhanced MR imaging in patients with glioblastoma is controversial. We investigated the added prognostic value of dynamic contrast-enhanced MR imaging to clinical parameters and molecular biomarkers in patients with glioblastoma by using histogram analysis. MATERIALS AND METHODS This retrospective study consisted of 61 patients who underwent preoperative dynamic contrast-enhanced MR imaging for glioblastoma. The histogram parameters of dynamic contrast-enhanced MR imaging, including volume transfer constant, extravascular extracellular volume fraction, and plasma volume fraction, were calculated from entire enhancing tumors. Univariate analyses for overall survival and progression-free survival were performed with preoperative clinical and dynamic contrast-enhanced MR imaging parameters and postoperative molecular biomarkers. Multivariate Cox regression was performed to build pre- and postoperative models for overall survival and progression-free survival. The performance of models was assessed by calculating the Harrell concordance index. RESULTS In univariate analysis, patients with higher volume transfer constant and extravascular extracellular volume fraction values showed worse overall survival and progression-free survival, whereas plasma volume fraction showed no significant correlation. In multivariate analyses for overall survival, the fifth percentile value of volume transfer constant and kurtosis of extravascular extracellular volume fraction were independently prognostic in the preoperative model, and kurtosis of volume transfer constant and extravascular extracellular volume fraction were independently prognostic in the postoperative model. For progression-free survival, independent prognostic factors were minimum and fifth percentile values of volume transfer constant and kurtosis of extravascular extracellular volume fraction in the preoperative model and kurtosis of extravascular extracellular volume fraction in the postoperative model. The performance of preoperative models for progression-free survival was significantly improved when minimum or fifth percentile values of volume transfer constant and kurtosis of extravascular extracellular volume fraction were added. CONCLUSIONS Higher volume transfer constant and extravascular extracellular volume fraction values are associated with worse prognosis, and dynamic contrast-enhanced MR imaging may have added prognostic value in combination with preoperative clinical parameters, especially in predicting progression-free survival.
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Affiliation(s)
- Y S Choi
- From the Departments of Radiology and Research Institute of Radiological Science (Y.S.C., S.-K.L., S.S.A.)
| | - D W Kim
- Department of Policy Research Affairs (D.W.K.), National Health Insurance Service Ilsan Hospital, Goyang, Gyeonggi-do, Korea
| | - S-K Lee
- From the Departments of Radiology and Research Institute of Radiological Science (Y.S.C., S.-K.L., S.S.A.)
| | - J H Chang
- Neurosurgery (J.H.C., S.-G.K., E.H.K.)
| | - S-G Kang
- Neurosurgery (J.H.C., S.-G.K., E.H.K.)
| | - E H Kim
- Neurosurgery (J.H.C., S.-G.K., E.H.K.)
| | | | - T H Rim
- Ophthalmology (T.H.R.), Yonsei University College of Medicine, Seoul, Korea
| | - S S Ahn
- From the Departments of Radiology and Research Institute of Radiological Science (Y.S.C., S.-K.L., S.S.A.)
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Choi YS, Rim TH, Ahn SS, Lee SK. Discrimination of Tumorous Intracerebral Hemorrhage from Benign Causes Using CT Densitometry. AJNR Am J Neuroradiol 2015; 36:886-92. [PMID: 25634719 DOI: 10.3174/ajnr.a4233] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 11/09/2014] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Differentiation of tumorous intracerebral hemorrhage from benign etiology is critical in initial treatment plan and prognosis. Our aim was to investigate the diagnostic value of CT densitometry to discriminate tumorous and nontumorous causes of acute intracerebral hemorrhage. MATERIALS AND METHODS This retrospective study included 110 patients with acute intracerebral hemorrhage classified into 5 groups: primary intracerebral hemorrhage without (group 1) or with antithrombotics (group 2) and secondary intracerebral hemorrhage with vascular malformation (group 3), brain metastases (group 4), or primary brain tumors (group 5). The 5 groups were dichotomized into tumorous (groups 4 and 5) and nontumorous intracerebral hemorrhage (groups 1-3). Histogram parameters of hematoma attenuation on nonenhanced CT were compared among the groups and between tumorous and nontumorous intracerebral hemorrhages. With receiver operating characteristic analysis, optimal cutoffs and area under the curve were calculated for discriminating tumorous and nontumorous intracerebral hemorrhages. RESULTS Histogram analysis of acute intracerebral hemorrhage attenuation showed that group 1 had higher mean, 5th, 25th, 50th, and 75th percentile values than groups 4 and 5 and higher minimum and 5th percentile values than group 2. Group 3 had higher 5th percentile values than groups 4 and 5. After dichotomization, all histogram parameters except maximum and kurtosis were different between tumorous and nontumorous intracerebral hemorrhages, with tumors having lower cumulative histogram parameters and positive skewness. In receiver operating characteristic analysis, 5th and 25th percentile values showed the highest diagnostic performance for discriminating tumorous and nontumorous intracerebral hemorrhages, with 0.81 area under the curve, cutoffs of 34 HU and 44 HU, sensitivities of 65.6% and 70.0%, and specificities of 85.0% and 80.0%, respectively. CONCLUSIONS CT densitometry of intracerebral hemorrhage on nonenhanced CT might be useful for discriminating tumorous and nontumorous causes of acute intracerebral hemorrhage.
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Affiliation(s)
- Y S Choi
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., S.-K.L.)
| | - T H Rim
- Department of Ophthalmology, Institute of Vision Research (T.H.R.), College of Medicine, Yonsei University, Seoul, Korea
| | - S S Ahn
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., S.-K.L.)
| | - S-K Lee
- From the Department of Radiology and Research Institute of Radiological Science (Y.S.C., S.S.A., S.-K.L.)
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Kim JM, Jo YY, Na SW, Kim SI, Choi YS, Kim NO, Park JE, Koh SO. The predictors for continuous renal replacement therapy in liver transplant recipients. Transplant Proc 2015; 46:184-91. [PMID: 24507049 DOI: 10.1016/j.transproceed.2013.07.075] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 07/13/2013] [Accepted: 07/30/2013] [Indexed: 12/23/2022]
Abstract
BACKGROUND Acute renal failure (ARF) after liver transplantation requiring continuous renal replacement therapy (CRRT) adversely affects patient survival. We suggested that postoperative renal failure can be predicted if a clinically simple nomogram can be developed, thus selecting potential risk factors for preventive strategy. METHODS We retrospectively reviewed the medical records of 153 liver transplant recipients from January 2008 to December 2011 at Severance Hospital, Yonsei University Health System, in Seoul, Korea. There were 42 patients treated with CRRT (20 and 22 patients received transplants from living and deceased donors, respectively) and 115 were not. Univariate and stepwise logistic multivariate analyses were performed. A clinical nomogram to predict postoperative CRRT application was constructed and validated internally. RESULTS Hepatic encephalopathy (HEP; odds ratio OR, 5.47), deceased donor liver donations (OR, 3.47), Model for End-Stage Liver Disease (MELD) score (OR, 1.09), intraoperative blood loss (L; OR, 1.16), and tumor (hepatocellular carcinoma) as the indication for liver transplantation (OR, 0.11) were identified as independent predictive factors for postoperative CRRT on multivariate analysis. A clinical prediction model constructed for calculating the probability of CRRT post-transplantation was 1.7000 × HEP + [-4.5427 + 1.2440 × (deceased donor) + 0.0830 × (MELD score) + 0.000149 × the amount of intraoperative bleeding (L) - 2.1785 × tumor]. The validation set discriminated well with an area under the curve (AUC) of 0.90 (95% confidence interval, 0.85-0.95). The predicted and the actual probabilities were calibrated with the clinical nomogram. CONCLUSIONS We developed a predictive model of postoperative CRRT in liver transplantation patients. Perioperative strategies to modify these factors are needed.
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Affiliation(s)
- J M Kim
- Department of Anesthesiology and Pain Medicine, and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Y Y Jo
- Department of Anesthesia and Pain Medicine, Gachon University Gil Hospital, Incheon, Korea
| | - S W Na
- Department of Anesthesiology and Pain Medicine, and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - S I Kim
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Y S Choi
- Department of Anesthesiology and Pain Medicine, and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - N O Kim
- Department of Anesthesiology and Pain Medicine, and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - J E Park
- Department of Anesthesiology and Pain Medicine, and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - S O Koh
- Department of Anesthesiology and Pain Medicine, and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
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Cha HJ, Lee DB, Jung HN, Choi YS, Suh HS. Investigation of Werner protein as an early DNA damage response in actinic keratosis, Bowen disease and squamous cell carcinoma. Clin Exp Dermatol 2014; 40:564-9. [PMID: 25545408 DOI: 10.1111/ced.12548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Werner protein (WRN) has DNA helicase activity and participates in recombination, replication and repair of DNA. Loss-of-function mutations in WRN gives rise to genetic instability and diseases such as premature ageing and cancer. Upregulation of WRN promotes proliferation and survival of cancer cells. AIM To evaluate the expression pattern of WRN in closely related skin cancers and their correlation with age, sex and UV exposure. METHODS Immunohistochemistry was used to investigate expression of WRN in formalin-fixed, paraffin wax-embedded tissue specimens of 9 squamous cell carcinoma (SCC), 15 actinic keratosis (AK), 11 Bowen disease (BD) and 11 normal-appearing peripheral tissue samples, obtained from patients during surgical resections. RESULTS WRN expression was significantly increased in BD, AK and SCC compared with normal controls, with the mean WRN staining score being highest in BD, followed by AK and SCC. However, age, sex and sun exposure were not associated with WRN expression. CONCLUSIONS To our knowledge, this is the first report to date investigating the expression of WRN in skin cancers. The overtly high expression of WRN in premalignant lesions and in in situ cancer, with relatively low WRN expression in SCC, may indicate that WRN contributes as a checkpoint for early DNA damage response in skin tumorigenesis.
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Affiliation(s)
- H J Cha
- Department of Pathology, Ulsan University Hospital, Ulsan, Korea
| | - D B Lee
- Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea
| | - H N Jung
- Department of Dermatology, Ulsan University Hospital, Ulsan, Korea
| | - Y S Choi
- Department of Dermatology, Ulsan University Hospital, Ulsan, Korea
| | - H S Suh
- Department of Dermatology, Ulsan University Hospital, Ulsan, Korea
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Yun BH, Chon SJ, Lee YJ, Han EJ, Cho S, Choi YS, Lee BS, Seo SK. Association of metabolic syndrome with coronary atherosclerosis in non-diabetic postmenopausal women. Climacteric 2014; 18:284-9. [PMID: 25233795 DOI: 10.3109/13697137.2014.960384] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE We investigated the possible association of metabolic syndrome with arterial stiffness and coronary atherosclerosis in non-diabetic, postmenopausal women. METHODS A total of 293 non-diabetic, postmenopausal women who visited the health promotion center for a routine health check-up were included in a cross-sectional study. Arterial stiffness was measured by brachial-ankle pulse wave velocity, and coronary atherosclerosis was detected using 64-row multi-detector computed tomography. RESULTS Women with coronary atherosclerosis had a significantly higher proportion of metabolic syndrome than those without coronary atherosclerosis. The brachial-ankle pulse wave velocity was significantly higher in women who had metabolic syndrome compared to those who had no metabolic syndrome (1567.71 ± 211.81 vs. 1336.75 ± 159.62 cm/s, p < 0.001). In addition, the brachial-ankle pulse wave velocity was shown to increase with increasing number of metabolic syndrome components (p for trend < 0.001). Metabolic syndrome was associated with increased risk of coronary atherosclerosis (adjusted odds ratio 2.38; 95% confidence interval 1.01-5.06), after adjusting for confounding factors. CONCLUSIONS Metabolic syndrome increases the risk of coronary atherosclerosis in postmenopausal women. Increased arterial stiffness may partly explain an increased risk of coronary atherosclerosis in postmenopausal women with metabolic syndrome.
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Affiliation(s)
- B H Yun
- * Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine , Seoul , Korea
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Kwon TR, Yoo KH, Oh CT, Shin DH, Choi EJ, Jung SJ, Hong H, Choi YS, Kim BJ. Improved methods for selective cryolipolysis results in subcutaneous fat layer reduction in a porcine model. Skin Res Technol 2014; 21:192-200. [PMID: 25220194 DOI: 10.1111/srt.12176] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2014] [Indexed: 12/28/2022]
Abstract
BACKGROUND/AIMS Cryolipolysis is a noninvasive method for the selective reduction of localized fat tissues. It has demonstrated efficacy in both clinical and preclinical trials; however, despite its popularity, its mechanisms of action and evaluation methods are not yet fully defined. The purpose of this study was to improved methods for cryolipolysis using a porcine model. METHODS The abdomens of female PWG micro-pigs were treated with a cooling device (CRYOLIPO II(™)), and we examined the treatment effects using photography, three-dimensional photography, ultrasound, gross, and microscopic pathology, and serum lipid level analyses in order to determine the mechanism of action, efficacy, and safety of CRYOLIPO II(™). RESULTS CRYOLIPO II(™) successfully reduced abdominal fat in our porcine model. Gross and microscopic histological results confirmed the noninvasive cold-induced selective subcutaneous fat destruction, and showed increases in pre-adipocyte differentiation and in the activation of lipid catabolism. In particular, we found that CRYOLIPO II(™) may increase PPARδ (delta) levels in adipose tissue at 30-60 days post-treatment. CONCLUSION Fat reduction by cryolipolysis was successfully achieved in our porcine model. Thus, our findings indicate that CRYOLIPO II(™) may be a promising fat reduction device for body contouring and fat reduction in humans, and that cryolipolysis exerts its effects, at least partly, by targeting the PPARδ signaling pathway. These results show that both investigative and diagnostic potentials capacity.
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Affiliation(s)
- T-R Kwon
- Department of Medicine, Graduate School, Chung-Ang University, Seoul, Korea; Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
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Kim SY, Huh KH, Lee JR, Kim SH, Jeong SH, Choi YS. Comparison of the effects of normal saline versus Plasmalyte on acid-base balance during living donor kidney transplantation using the Stewart and base excess methods. Transplant Proc 2014; 45:2191-6. [PMID: 23953528 DOI: 10.1016/j.transproceed.2013.02.124] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 02/16/2013] [Indexed: 12/20/2022]
Abstract
BACKGROUND Ischemia-reperfusion injury is an inevitable consequence of kidney transplantation, leading to metabolic acidosis. This study compared the effects of normal saline (NS) and Plasmalyte on acid-base balance and electrolytes during living donor kidney transplantation using the Stewart and base excess (BE) methods. METHODS Patients were randomized to an NS group (n = 30) or a Plasmalyte group (n = 30). Arterial blood samples were collected for acid-base analysis after induction of anesthesia (T0), prior to clamping the iliac vein (T1), 10 minutes after reperfusion of the donated kidney (T2), and at the end of surgery (T3). In addition serum creatinine and 24-hour urine output were recorded on postoperative days 1,2, and 7. Over the first postoperative 7 days we recorded episodes of graft failure requiring dialysis. RESULTS Compared with the Plasmalyte group, the NS group showed significantly lower values of pH, BE, and effective strong ion differences during the postreperfusion period (T2 and T3). Chloride-related values (chloride [Cl(-)], free-water corrected Cl(-), BEcl) were significantly higher at T1, T2, and T3, indicating hyperchloremic rather than dilutional metabolic acidosis. Early postoperative graft functions in terms of serum creatinine, urine output, and graft failure requiring dialysis were not significantly different between the groups. CONCLUSIONS Both NS and Plamalyte can be used safely during uncomplicated living donor kidney transplantation. However, Plasmalyte more stably maintains acid-base and electrolyte balance compared with NS especially during the postreperfusion period.
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Affiliation(s)
- S Y Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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