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Han M, Hwang S, Agusbudiman A, Lee JM, Lee KB, Kim BC, Heo DH, Kim TH. Digital coincidence counting with 4πβ(PPC)-γ for the standardization of 60Co. Appl Radiat Isot 2024; 205:111173. [PMID: 38211394 DOI: 10.1016/j.apradiso.2024.111173] [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: 09/30/2023] [Revised: 12/22/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024]
Abstract
A 4πβ(PPC)-γ coincidence system has been made at KRISS based on a digital DAQ. 60Co sources were measured to verify the system. The maximum detection efficiency for beta particles was estimated to be 96.7 %. Massic activities for sample sources had 0.005 % of the sample variability error, which was well within the expanded standard uncertainty of 0.54 % (k = 2).
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Affiliation(s)
- Minji Han
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - Sanghoon Hwang
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea.
| | - Agung Agusbudiman
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - J M Lee
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - K B Lee
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - B C Kim
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea
| | - D H Heo
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea
| | - T H Kim
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea
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2
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Hsu FM, Huang TC, Guo JC, Hsu CH, Lee JM, Huang PM, Chang YL, Cheng JCH. A Prospective Study of Bevacizumab and Neoadjuvant Concurrent Chemoradiation in Locally Advanced Esophageal Squamous Cell Carcinoma: Paradoxical Increase in Circulating Vascular Endothelial Growth Factor-A and Effect on Outcome. Int J Radiat Oncol Biol Phys 2023; 117:e302-e303. [PMID: 37785104 DOI: 10.1016/j.ijrobp.2023.06.2320] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) In the prior prospective biomarker study, high serum vascular endothelial growth factor-A (VEGF-A) was associated with a poor prognosis. We conducted a prospective phase II trial of adding Bevacizumab, an anti-VEGF-A monoclonal antibody, to neoadjuvant concurrent chemoradiation (neoCCRT) for patients with locally advanced esophageal squamous cell carcinoma (LA-ESCC). This prospective biomarker study aims to evaluate the expressions of angiogenesis-associated circulating biomarkers before and after neoCCRT and compare clinical outcomes for patients receiving platinum/5-fluorouracil (PF) with or without Bevacizumab. MATERIALS/METHODS Patients with biopsy-proven resectable non-T4 LA-ESCC were enrolled for the prospective phase II trial investigating PF-neoCCRT plus Bevacizumab (BPF group). A parallel patient cohort enrolled in a prospective biomarker study receiving PF-neoCCRT was included in the present analysis as the control group (PF group). Radiotherapy was delivered with 40 Gy in 20 fractions. All patients had restaging workups after enoCCRT and underwent radical esophagectomy if the disease remained resectable. Serums were collected before and after neoCCRT. The serum concentrations of angiogenesis-associated biomarkers were determined by the multiplex enzyme-linked immunosorbent assay. Survival analyses were performed by the Kaplan-Meier method. The t-test and log-rank test were used to compare differences in biomarker expression and survival between groups. RESULTS From 2016 to 2019, 43 patients (BPF/PF group: 21/22) were enrolled in the study. Twenty patients in each group had serum samples available for biomarker analysis. 15 out of 21 patients in the BPF group and 20 out of 22 patients in the PF group underwent radical esophagectomy. Six patients in the BPF group and nine patients in the PF group achieved pathological complete responses. The median overall survival for the BPF and PF group was 20.8 months and not-reached, respectively (hazard ratio = 1.33, long rank p = 0.58). In the BPF group, the serum VEGF-A level was significantly increased from an average value of 446 pg/mL to 723 pg/mL after neoCCRT (p = 0.037), while its level was decreased from 815 ng/mL to 380 pg/mL in the PF group (p = 0.104). In addition, the expression value of circulating Angiopoietin-1 was not changed in the BPF group (before neoCCRT, mean value = 828 pg/mL; after neoCCRT, mean value 762 pg/mL, p = 0.67). In contrast, serum Angiopoietin-1 level was reduced from an average value of 659 pg/mL before neoCCRT to 271 pg/mL after neoCCRT (p = 0.002) in the PF group. CONCLUSION The addition of Bevacizumab to PF-neoCCRT did not improve pathological or survival outcomes in patients with resectable LA-ESCC. Adding a single dose of Bevacizumab paradoxically increases circulating VEGF-A while maintaining the Angiopoietin-1 serum level after neoCCRT. Further investigation by using additional VEGF-A inhibition may be required to achieve sustained angiogenesis blocked for tumor control.
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Affiliation(s)
- F M Hsu
- Department of Radiation Oncology, National Taiwan University Cancer Center, Taipei, Taiwan; Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - T C Huang
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
| | - J C Guo
- Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
| | - C H Hsu
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
| | - J M Lee
- Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - P M Huang
- Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Y L Chang
- Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - J C H Cheng
- Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan; Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
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3
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Lee JM, Huang X, Goh GL, Tran T, Yeong WY. Understanding droplet jetting on varying substrate for biological applications. Int J Bioprint 2023; 9:758. [PMID: 37457927 PMCID: PMC10339429 DOI: 10.18063/ijb.758] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 01/04/2023] [Indexed: 07/18/2023] Open
Abstract
In the inkjet printing process, the droplet experience two phases, namely the jetting and the impacting phases. In this review article, we aim to understand the physics of a jetted ink, which begins during the droplet formation process. Following which, we highlight the different impacts during which the droplet lands on varying substrates such as solid, liquid, and less commonly known viscoelastic material. Next, the article states important process-specific considerations in determining the success of inkjet bioprinted constructs. Techniques to reduce cell deformation throughout the inkjet printing process are highlighted. Modifying postimpact events, such as spreading, evaporation, and absorption, improves cell viability of printed droplet. Last, applications that leverage on the advantage of pixelation in inkjet printing technology have been shown for drug screening and cell-material interaction studies. It is noteworthy that inkjet bioprinting technology has been integrated with other processing technologies to improve the structural integrity and biofunctionality of bioprinted construct.
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Affiliation(s)
- Jia Min Lee
- HP-NTU Digital Manufacturing Corp Lab, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Xi Huang
- HP-NTU Digital Manufacturing Corp Lab, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Guo Liang Goh
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Tuan Tran
- HP-NTU Digital Manufacturing Corp Lab, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Wai Yee Yeong
- HP-NTU Digital Manufacturing Corp Lab, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
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4
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Brier LM, Chen S, Sherafati A, Bice AR, Lee JM, Culver JP. Transient disruption of functional connectivity and depression of neural fluctuations in a mouse model of acute septic encephalopathy. Cereb Cortex 2023; 33:3548-3561. [PMID: 35972424 PMCID: PMC10068285 DOI: 10.1093/cercor/bhac291] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 11/13/2022] Open
Abstract
Septic encephalopathy leads to major and costly burdens for a large percentage of admitted hospital patients. Elderly patients are at an increased risk, especially those with dementia. Current treatments are aimed at sedation to combat mental status changes and are not aimed at the underlying cause of encephalopathy. Indeed, the underlying pathology linking together peripheral infection and altered neural function has not been established, largely because good, acutely accessible readouts of encephalopathy in animal models do not exist. Behavioral testing in animals lasts multiple days, outlasting the time frame of acute encephalopathy. Here, we propose optical fluorescent imaging of neural functional connectivity (FC) as a readout of encephalopathy in a mouse model of acute sepsis. Imaging and basic behavioral assessment were performed at baseline, Hr8, Hr24, and Hr72 following injection of either lipopolysaccharide or phosphate buffered saline. Neural FC strength decreased at Hr8 and returned to baseline by Hr72 in motor, somatosensory, parietal, and visual cortical regions. Additionally, neural fluctuations transiently declined at Hr8 and returned to baseline by Hr72. Both FC strength and fluctuation tone correlated with neuroscore indicating this imaging methodology is a sensitive and acute readout of encephalopathy.
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Affiliation(s)
- L M Brier
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - S Chen
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - A Sherafati
- Department of Physics, Washington University School of Arts and Science, St. Louis, MO 63110, USA
| | - A R Bice
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - J M Lee
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - J P Culver
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
- Department of Physics, Washington University School of Arts and Science, St. Louis, MO 63110, USA
- Department of Biomedical Engineering, Washington University School of Engineering, St. Louis, MO 63110, USA
- Department of Electrical and Systems Engineering, Washington University School of Engineering, St. Louis, MO 63110, USA
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5
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Lee JM, Lee YS, Lee YJ, Lee JH, Han TY, Choi JE. Generalized painful papulovesicular eruption following the COVID-19 BNT162b2 mRNA vaccine. J Eur Acad Dermatol Venereol 2023. [PMID: 36914917 DOI: 10.1111/jdv.19043] [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] [Received: 01/24/2023] [Accepted: 03/07/2023] [Indexed: 03/16/2023]
Affiliation(s)
- J M Lee
- Department of Dermatology, Nowon Eulji Medical Center, Eulji University, Seoul, South Korea
| | - Y S Lee
- Department of Dermatology, Nowon Eulji Medical Center, Eulji University, Seoul, South Korea
| | - Y J Lee
- Department of Dermatology, Nowon Eulji Medical Center, Eulji University, Seoul, South Korea
| | - J H Lee
- Department of Dermatology, Nowon Eulji Medical Center, Eulji University, Seoul, South Korea
| | - T Y Han
- Department of Dermatology, Nowon Eulji Medical Center, Eulji University, Seoul, South Korea
| | - J E Choi
- Department of Dermatology, Nowon Eulji Medical Center, Eulji University, Seoul, South Korea
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Goh GD, Lee JM, Goh GL, Huang X, Lee S, Yeong WY. Machine Learning for Bioelectronics on Wearable and Implantable Devices: Challenges and Potential. Tissue Eng Part A 2023; 29:20-46. [PMID: 36047505 DOI: 10.1089/ten.tea.2022.0119] [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] [Indexed: 01/20/2023] Open
Abstract
Bioelectronics presents a promising future in the field of embedded and implantable electronics, providing a range of functional applications, from personal health monitoring to bioactuators. However, due to the intrinsic difficulties present in producing and optimizing bioelectronics, recent research has focused on utilizing machine learning (ML) to reliably mitigate such issues and aid in process development. This review focuses on the recent developments of integrating ML into bioelectronics, aiding in a multitude of areas, such as material development, fabrication process optimization, and system integration. First, discussing how ML has aided in the material development by identifying complex relationships between process input parameters and desired outputs, such as product design. Second, examine the advancements in ML to accurately optimize fabrication precision and stability for various 3D printing technologies. Third, provide an overview of how ML can greatly assist in the analysis of complex, nonlinear relationships in data obtained from bioelectronics. Lastly, a summary of the challenges present with utilizing ML with bioelectronics and any other developments in this field. Such advancements in the field of bioelectronics and ML could hopefully build a strong foundation for this research field, promoting smart optimization together with effective use of ML to further enhance the effectiveness of such applications. Impact statement The article serves to give insight about the use of the machine learning (ML) techniques in the field of bioelectronics, since bioelectronics and ML are two distinct fields. This article allows bioelectronics researcher to get to know the latest advancement in the ML field. On the other hand, the article provides an insight to the ML researchers about how ML techniques can be useful in bioelectronics applications.
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Affiliation(s)
- Guo Dong Goh
- Singapore Center for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University Singapore, Singapore, Singapore
| | - Jia Min Lee
- NTU-HP Joint Lab and Nanyang Technological University Singapore, Singapore, Singapore
| | - Guo Liang Goh
- Schaeffler Hub for Advanced Research (SHARE@NTU), Nanyang Technological University Singapore, Singapore, Singapore
| | - Xi Huang
- NTU-HP Joint Lab and Nanyang Technological University Singapore, Singapore, Singapore
| | - Samuel Lee
- Schaeffler Hub for Advanced Research (SHARE@NTU), Nanyang Technological University Singapore, Singapore, Singapore
| | - Wai Yee Yeong
- Singapore Center for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University Singapore, Singapore, Singapore.,Schaeffler Hub for Advanced Research (SHARE@NTU), Nanyang Technological University Singapore, Singapore, Singapore
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7
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Vink CEM, Hoef TP, Lee JM, Boerhout CKM, Koo BK, Escaned J, Piek JJ, Kakuta T, Appelman Y, De Waard G. Sex-differences in prevalence and outcomes of the different endotypes of chronic coronary syndrome – analysis from the multi-center international ILIAS Registry. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1152] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Guideline-directed management of chronic coronary syndrome (CCS) remains focused on obstructive causes of angina, and is based on established therapies derived from studies predominantly including men. This occurs despite documented higher mortality from cardiovascular causes in women compared to men, which is hypothesized to be related to a higher prevalence of coronary microvascular dysfunction (CMD) in women. However, data on the relationship between sex, the different endotypes of CCS, and related sex-specific clinical outcomes are limited.
Purpose
This study aimed to investigate the relationship between sex and the different endotypes of CCS, as well as sex-specific clinical outcomes of CCS endotypes.
Method
In patients with stable angina undergoing coronary angiography, the following invasive coronary hemodynamics were characterized: fractional flow reserve (FFR; <0.80 considered abnormal), coronary flow reserve (CFR; <2.0 considered abnormal) and microcirculatory resistance (MR) (hyperemic microvascular resistance; >2.5mmHg/cm/sec or index of microvascular resistance >25 considered abnormal). Patients were stratified into three groups: 1) hemodynamically significant obstructive coronary artery disease (oCAD) (FFR abnormal or a severe coronary stenosis requiring revascularization), 2) no-obstructive coronary artery disease but with CMD (FFR normal, but abnormal CFR and/or MR), or 3) no-obstructive coronary artery disease and no CMD (FFR normal, and normal CFR and MR). We assessed the prevalence of the CCS endotypes across sex, and sex-specific cardiovascular outcomes over a follow-up of 7 years defined as the composite endpoint of death or acute myocardial infarction.
Results
Amongst a total of 1987 included patients, 1435 (72.2%) were men and 552 (27.8%) were women. oCAD occurred in 904 (45.5%) patients, which was significantly more prevalent in men (48.9% (701/1435) of men vs. 36.8% (203/552) of women, p<0.001). In contrast, CMD was significantly more prevalent in women (19.6% (281/1435) of men vs. 24.1% (133/552) of women, p=0.031). Across the population, either oCAD or CMD occurred in 68.4% of men versus 60.9% of women (p=0.002). There were no sex-specific differences in cardiovascular outcomes across CCS entities (Figure 1).
Conclusion
In patients evaluated for CCS who underwent clinically indicated coronary angiography and physiological assessment, men were more likely to have oCAD and women were more likely to be classified as CMD. There were no sex-related differences in the prognosis associated with the individual CCS endotypes. Therefore, pathophysiological changes in the coronary circulation potentially underlying angina pectoris are similarly prevalent in men and women, but the high incidence of CMD in women makes women prone to underdiagnosis if no additional physiological measurements are assessed.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- C E M Vink
- Amsterdam University Medical Center, Cardiology , Amsterdam , The Netherlands
| | - T P Hoef
- Amsterdam University Medical Center, Cardiology , Amsterdam , The Netherlands
| | - J M Lee
- Samsung Medical Center, Division of Cardiology, Department of Medicine, Heart Vascular Stroke Institute , Seoul , Korea (Republic of)
| | - C K M Boerhout
- Amsterdam University Medical Center, Cardiology , Amsterdam , The Netherlands
| | - B K Koo
- University of Ulsan, Cardiology , Ulsan , Korea (Republic of)
| | - J Escaned
- Hospital Clinico San Carlos , Madrid , Spain
| | - J J Piek
- Amsterdam University Medical Center, Cardiology , Amsterdam , The Netherlands
| | - T Kakuta
- Tsuchiura Kyodo General Hospital, Cardiology , Tsuchiura , Japan
| | - Y Appelman
- Amsterdam University Medical Center, Cardiology , Amsterdam , The Netherlands
| | - G De Waard
- Amsterdam University Medical Center, Cardiology , Amsterdam , The Netherlands
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8
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Travieso A, Mejia-Renteria H, Jeronimo-Baza A, Hyun Jung J, Doh JH, Nam CW, Shin ES, Hoshino M, Sugiyama T, Kanaji Y, Gonzalo N, Lee JM, Kakuta T, Koo BK, Escaned J. Hyperaemic and non-hyperaemic pressure indices of coronary stenosis severity in patients with chronic kidney disease. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1124] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Evidence regarding the use of pressure indices for the assessment of coronary stenoses in patients with chronic kidney disease (CKD) is scarce.
Methods
We assessed the relation between eGFR, FFR and resting Pd/Pa in 1147 consecutive patients (1316 vessels) included in the International Collaboration of Comprehensive Physiologic Assessment Study. We also compared FFR and Pd/Pa against a standardized cut-off of coronary flow reserve (CFR<2.0). Finally, we examined the occurrence of vessel-oriented composite outcome (VOCO: cardiac death, vessel-specific revascularization, vessel-specific myocardial infarction) across negative/positive results of both FFR and CFR in patients with and without CKD.
Results
FFR increases as renal function worsens (beta −10.5, 95% CI −20.0 to −11.03, p=0.030), a relation that was not seen with resting Pd/Pa (beta −6.14, 95% CI −19.9 to 6.78, p=0.351). Both indices had similar diagnostic accuracies for the detection of a CFR<2.0 in the presence of CKD (AUC 0.629 for FFR vs 0.663 for resting Pd/Pa, p=0.192). However, CKD patients showed a higher proportion of vessels with negative FFR but low CFR (24.5% vs 13.4%, p=0.015).
CFR decreased linearly with deteriorating eGFR, and this was mainly driven by higher resting coronary flow in CKD patients (p=0.026), while hyperaemic coronary flow remained similar (p=0.403). IMR did not change significantly with eGFR (beta −0.02, 95% −0.09 to 0.05, p=0.557).
The incidence of VOCO was higher in patients with CKD and FFR>0.80 when compared to non-CKD patients and FFR>0.80 (12.7% vs 6.90%, p=0.062). Prognosis was worse for those with CKD, negative FFR and CFR<2.0 (20.59% vs. 8.44% in non-CKD, p=0.038).
Conclusions
The assessment of a given coronary stenosis in patients with CKD with either FFR or resting Pd/Pa is equivalent when compared to underlying coronary flow. In CKD, impaired CFR is caused by a state of increased resting flow. The assessment of CFR on top of standard pressure wire examination significantly improves prognostic stratification in CKD patients.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- A Travieso
- San Carlos Clinical Hospital , Madrid , Spain
| | | | | | - J Hyun Jung
- Sejong General Hospital , Bucheon , Korea (Republic of)
| | - J H Doh
- Ilsan Paik Hospital , Ilsan , Korea (Republic of)
| | - C W Nam
- Dongsan Medical Center. Keimyung University , Daegu , Korea (Republic of)
| | - E S Shin
- Ulsan University Hospital , Ulsan , Korea (Republic of)
| | - M Hoshino
- Tsuchiura Kyodo General Hospital , Ibaraki , Japan
| | - T Sugiyama
- Tsuchiura Kyodo General Hospital , Ibaraki , Japan
| | - Y Kanaji
- Tsuchiura Kyodo General Hospital , Ibaraki , Japan
| | - N Gonzalo
- San Carlos Clinical Hospital , Madrid , Spain
| | - J M Lee
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - T Kakuta
- Tsuchiura Kyodo General Hospital , Ibaraki , Japan
| | - B K Koo
- Seoul National University Hospital , Seoul , Korea (Republic of)
| | - J Escaned
- Seoul National University Hospital , Seoul , Korea (Republic of)
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9
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Kwon W, Yang JH, Lee SH, Choi KH, Park TK, Lee JM, Song YB, Hahn JY, Choi SH, Ahn CM, Ko YG, Yu CW, Jang WJ, Kim HJ, Kwon SU. Impact of obesity paradox between genders on in-hospital mortality in cardiogenic shock: a retrospective cohort study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1497] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
In a few studies, obesity was associated with better outcomes in patients with cardiogenic shock (CS). Although this phenomenon, the “obesity paradox”, reportedly manifests differently based on sex in other disease entities, it has not yet been investigated in CS patients.
Methods and results
1,227 patients with CS from The REtrospective and prospective observational Study to investigate Clinical oUtcomes and Efficacy of left ventricular assist device for Korean patients with cardiogenic shock (RESCUE) registry in Korea were analyzed. The study population was classified into obese and non-obese groups according to Asian-Pacific criteria (BMI >25.0 kg/m2 for obese). Clinical impact of obesity on in-hospital mortality according to sex was analyzed using logistic regression analysis and restricted cubic spline curves. In-hospital mortality rate was significantly lower in obese men than non-obese men (34.2% vs. 24.1%, p=0.004) while the difference was not significant in women (37.3% vs. 35.8%, p=0.884). As a continuous variable, higher BMI showed a protective effect in men conversely, BMI was not associated with clinical outcomes in women. Comparing to normal-weight patients, obesity was associated with a decreased risk of in-hospital death in men (multivariable-adjusted OR 0.63, CI 0.43–0.92, p=0.016), not in women (multivariable-adjusted OR 0.94, 95% CI 0.55–1.61, p=0.828). Interaction P value for the association between BMI and sex was 0.023.
Conclusions
Obesity paradox exists and apparently occurs in men among CS patients. The differential effect of BMI on in-hospital mortality was observed according to sex.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- W Kwon
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - J H Yang
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - S H Lee
- Chonnam National University Hospital , Gwangju , Korea (Republic of)
| | - K H Choi
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - T K Park
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - J M Lee
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - Y B Song
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - J Y Hahn
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - S H Choi
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - C M Ahn
- Yonsei Cardiovascular Center , Seoul , Korea (Republic of)
| | - Y G Ko
- Yonsei Cardiovascular Center , Seoul , Korea (Republic of)
| | - C W Yu
- Korea University Anam Hospital , Seoul , Korea (Republic of)
| | - W J Jang
- Ewha Womans University Seoul Hospital , Seoul , Korea (Republic of)
| | - H J Kim
- Konkuk University Hospital , Seoul , Korea (Republic of)
| | - S U Kwon
- Inje University Sanggye Paik Hospital , Seoul , Korea (Republic of)
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10
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Kwon O, Myong JP, Lee Y, Choi YJ, Yi JE, Seo SM, Jang SW, Kim PJ, Lee JM. Sodium-glucose co-transporter-2 inhibitors after acute myocardial infarction in type 2 diabetes patients: a population-based investigation from South Korea. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1221] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Whether the early use of sodium-glucose co-transporter-2 (SGLT2) inhibitors has cardioprotective effects following acute myocardial infarction (AMI) is unknown.
Purpose
We aimed to evaluate the association between the early initiation of SGLT2 inhibitors and cardiac event rates in diabetes patients with AMI undergoing percutaneous coronary intervention (PCI).
Methods
Based on the National Health Insurance claims data in South Korea, patients aged 18 years or older who had undergone PCI for the diagnosis of AMI between 2014 and 2018 were analyzed. Patients treated with SGLT2 inhibitors or other glucose-lowering drugs were matched based on a propensity score. The primary endpoint was a composite of all-cause mortality and hospitalizations for heart failure (HF). Major adverse cardiac events (MACE; a composite of all-cause death, non-fatal MI, and ischemic stroke) were compared as the secondary endpoint.
Results
After 1:2 propensity score matching, a total of 26,814 patients were assigned to the SGLT2 inhibitors group (938 patients) and the no use of SGLT2 inhibitors group (1,876 patients), respectively. During a median follow-up of 2.1 years, compared to no use of SGLT2 inhibitors, the early use of SGLT2 inhibitors was associated with lower risks of both the primary endpoint (9.8% vs. 13.9%, adjusted hazard ratio [HR] = 0.68, 95% confidence interval [CI]: 0.54 to 0.87, p=0.002) and secondary endpoint (9.1% vs. 11.6%, adjusted HR = 0.77, 95% CI: 0.60 to 0.99, p=0.04) (Figure 1). All-cause mortality and hospitalizations for HF were significantly lower in the early use of SLGT2 inhibitors group (adjusted HR = 0.55; 95% CI: 0.37 to 0.80; p=0.002; and HR = 0.74; 95% CI: 0.56 to 0.98; p=0.03, respectively). The incidence of non-fatal MI and ischemic stroke were not statistically different (Figure 2).
Conclusions
The early use of SGLT2 inhibitors in diabetes patients treated with PCI for AMI was associated with a significantly lower risk of cardiovascular events including all-cause mortality, hospitalizations for HF, and MACE. Our results suggest that the use of SGLT2 inhibitors could expand to the acute phase of AMI survivors with diabetes to reduce mortality and the subsequent development of congestive HF and ischemic events.
Funding Acknowledgement
Type of funding sources: Private hospital(s). Main funding source(s): This work was partly supported by the Research Institute of Medical Science, The Catholic University of Korea, Eunpyeong St. Mary's Hospital, Seoul, Republic of Korea.
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Affiliation(s)
- O Kwon
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - J P Myong
- The Catholic University of Korea Seoul St. Mary's Hospital, Department of Occupational & Environmental Medicine , Seoul , Korea (Republic of)
| | - Y Lee
- The Catholic University of Korea Seoul St. Mary's Hospital, Department of Urology , Seoul , Korea (Republic of)
| | - Y J Choi
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - J E Yi
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S M Seo
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S W Jang
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - P J Kim
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - J M Lee
- Eunpyeoung St. Mary's Hospital, Division of Endocrinology, Department of Internal Medicine , Seoul , Korea (Republic of)
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11
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Lee JM, Park CH, Yoo JI, Kim JT, Cha Y. Atypical periprosthetic femoral fracture with stem breakage: a case report. Osteoporos Int 2022; 33:2043-2047. [PMID: 35688896 DOI: 10.1007/s00198-022-06463-2] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 06/01/2022] [Indexed: 11/27/2022]
Abstract
Although the American Society for Bone and Mineral Research definition of atypical femoral fracture excludes periprosthetic fractures, fractures around the prosthesis with clinical features of atypical femoral fractures have been reported in the literature. All fractures reported thus far have been distal to the prosthetic segment; however, we encountered a case of a stress fracture in the middle of the femoral component segment. An 86-year-old woman with a history of bisphosphonate osteoporosis treatment and revisional total hip arthroplasty visited our outpatient clinic complaining of pain in the left thigh and groin. We diagnosed an incomplete atypical femoral fracture around the hip prosthesis; medical treatment was implemented. Two months later, the patient visited the emergency department with a complete subtrochanteric fracture with stem breakage. Without revision of the broken stem, two plates were applied after reduction. In this case, we recognized the possibility of a stress fracture but overlooked the possibility of stem breakage in an atypical femoral fracture. Even if it is not evident on the radiograph before complete fracture, clinicians should be alert to the signs of stress fracture in the middle of the femoral component segment, as they may be clues to atypical periprosthetic femoral fracture with stem failure. Isolated medical treatment plans are not recommended for incomplete subtrochanteric atypical periprosthetic femoral fracture. Instead, concomitant prophylactic plate fixation is recommended.
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Affiliation(s)
- J M Lee
- Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou Medical Center, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, South Korea
| | - C H Park
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Daegu, South Korea
| | - J-I Yoo
- Department of Orthopedics, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, South Korea
| | - J-T Kim
- Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou Medical Center, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, South Korea.
| | - Y Cha
- Department of Orthopedic Surgery, Daejeon Eulji Medical Center, Eulji University School of Medicine, 95 Dunsan-Seoro, Seo-gu, Daejeon, 302-799, South Korea.
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12
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Ma JP, Robbins CB, Lee JM, Soundararajan S, Stinnett SS, Agrawal R, Plassman BL, Lad EM, Whitson H, Grewal DS, Fekrat S. Longitudinal analysis of the retina and choroid in cognitively normal individuals at higher genetic risk for Alzheimer disease. Ophthalmol Retina 2022; 6:607-619. [PMID: 35283324 DOI: 10.1016/j.oret.2022.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/18/2022] [Accepted: 03/03/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE To assess baseline differences and longitudinal rate of change in retinal and choroidal imaging parameters between APOE ε4 carriers and non-carriers with normal cognition. DESIGN Prospective study. SUBJECTS 413 eyes of 218 individuals with normal cognition aged ≥55 years with known APOE status (98 ε4 carriers, 120 non-carriers). Exclusion criteria included diabetes mellitus, uncontrolled hypertension, glaucoma, and vitreoretinal or neurodegenerative disease. METHODS Optical coherence tomography (OCT) and OCT angiography (OCTA) was performed at baseline and at 2 years [Zeiss Cirrus HD-OCT 5000 with AngioPlex (Zeiss Meditec, Dublin, CA)]. Groups were compared using sex- and age-adjusted generalized estimating equations. MAIN OUTCOME MEASURES OCT: retinal nerve fiber layer thickness, macular ganglion cell-inner plexiform layer thickness, central subfield thickness (CST), choroidal vascularity index. OCTA: foveal avascular zone area, perfusion density (PD), vessel density, peripapillary capillary perfusion density and capillary flux index (CFI). Rate of change per year was calculated. RESULTS At baseline, ε4 carriers demonstrated decreased CST (p=0.018), PD in the 6mm Early Treatment Diabetic Retinopathy Study (ETDRS) circle (p=0.049), and temporal CFI (p=0.047). Seventy-one ε4 carriers and 78 non-carriers returned at 2 years; at follow-up, the 6mm ETDRS circle (p=0.05) and outer ring (p=0.049) showed decreased PD in ε4 carriers, with no differences in rates of change between groups (all p>0.05). CONCLUSIONS There were measured differences in CST, PD, and peripapillary CFI between APOE ε4 carriers and non-carriers with normal cognition. Larger and longer-term studies may further elucidate the potential prognostic value of these findings.
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Affiliation(s)
- Justin P Ma
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Cason B Robbins
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Jia Min Lee
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore
| | - Srinath Soundararajan
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Sandra S Stinnett
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Rupesh Agrawal
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Singapore Eye Research Institute, Singapore; Duke NUS Medical School, Singapore
| | - Brenda L Plassman
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Departments of Psychiatry and Neurology, Duke University School of Medicine, Durham, NC, USA
| | - Eleonora M Lad
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Heather Whitson
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Dilraj S Grewal
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Sharon Fekrat
- iMIND Research Group, Duke University School of Medicine, Durham, NC, USA; Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA.
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13
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Mirzania D, Thompson AC, Robbins CB, Soundararajan S, Lee JM, Agrawal R, Liu AJ, Johnson KG, Grewal DS, Fekrat S. Retinal and Choroidal Changes in Men Compared with Women with Alzheimer’s Disease. Ophthalmology Science 2022; 2:100098. [PMID: 36246183 PMCID: PMC9559893 DOI: 10.1016/j.xops.2021.100098] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 12/01/2022]
Abstract
Purpose To evaluate differences in the retinal microvasculature and structure and choroidal structure among men and women with Alzheimer’s disease (AD) compared with age-matched cognitively normal male and female controls. Design Case-control study of participants ≥ 50 years of age. Participants A total of 202 eyes of 139 subjects (101 cases and 101 controls). Methods All participants and controls underwent OCT and OCT angiography (OCTA), and parameters of subjects with AD were compared with those of cognitively normal controls. Main Outcome Measures The foveal avascular zone (FAZ) area, vessel density (VD), and perfusion density (PD) in the superficial capillary plexus within the 3- and 6-mm circle and ring using Early Treatment Diabetic Retinopathy Study (ETDRS) grid overlay on OCTA; central subfield thickness (CST), retinal nerve fiber layer (RNFL) thickness, ganglion cell-inner plexiform layer (GCIPL) thickness, and choroidal vascularity index (CVI) on OCT. Results No significant sex differences in VD or PD were found in the AD or control cohorts; however, there were greater differences in VD and PD among AD female participants than AD male participants compared with their respective controls. The CST and FAZ area were not different between male and female AD participants. Among controls, men had a thicker CST (P < 0.001) and smaller FAZ area (P = 0.003) compared with women. The RNFL thickness, GCIPL thickness, and CVI were similar among male and female AD participants and controls. Conclusions There may be a loss of the physiologic sex-related differences in retinal structure and microvasculature in those with AD compared with controls. Further studies are needed to elucidate the pathophysiological basis for these findings.
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Affiliation(s)
- Delaram Mirzania
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Ophthalmology, Durham, North Carolina
| | - Atalie C. Thompson
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Ophthalmology, Durham, North Carolina
| | - Cason B. Robbins
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Ophthalmology, Durham, North Carolina
| | - Srinath Soundararajan
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Ophthalmology, Durham, North Carolina
| | - Jia Min Lee
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore
| | - Rupesh Agrawal
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore
| | - Andy J. Liu
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Neurology, Durham, North Carolina
| | - Kim G. Johnson
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Neurology, Durham, North Carolina
| | - Dilraj S. Grewal
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Ophthalmology, Durham, North Carolina
| | - Sharon Fekrat
- iMIND Research Group, Duke University School of Medicine, Durham, North Carolina
- Duke Department of Ophthalmology, Durham, North Carolina
- Correspondence: Sharon Fekrat, MD, Duke University Department of Ophthalmology, 2351 Erwin Road, Box 3802, Durham, NC 27710. .
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14
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Low R, Lee JM, Lai SS, Rousselot A, Agarwal M, Agrawal R. Eye Care During the COVID-19 Pandemic: A Report on Patients' Perceptions and Experiences, an Asian Perspective. Ophthalmol Ther 2022; 11:403-419. [PMID: 34936062 PMCID: PMC8692826 DOI: 10.1007/s40123-021-00444-0] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/01/2021] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION To elucidate the perceptions on eye care of patients affected by the disruption of outpatient and surgical ophthalmological services during the COVID-19 pandemic. METHODS A cross-sectional questionnaire-based survey was conducted during the reopening of outpatient services at two tertiary eye care centres in Singapore and North India. Consecutive patients were recruited from general and specialist eye clinics in June 2020. RESULTS A total of 326 patients were recruited, 200 patients from Singapore and 126 patients from New Delhi, India. The most common eye conditions were diabetic retinopathy and uveitis or ocular inflammatory conditions in the Indian centre, whereas the most common in the Singaporean centre were cataract in the pre- or postoperative stage and glaucoma. For patients from the Indian centre, 61.9% felt that COVID-19 had negatively impacted their eye disease, 58.7% were more distressed by their eye disease, 70.8% could not access appropriate eye care, 66.6% were afraid of contracting COVID-19 in the clinic, and 61.9% were accepting of teleconsultations. For patients from the Singaporean centre, 13.5% felt that COVID-19 had negatively impacted their eye disease, 19.5% were more distressed by their eye disease, 21.5% could not access appropriate eye care, 35% were afraid of contracting COVID-19 in the clinic, and only 31% were accepting of teleconsultations. CONCLUSION Patients from India appear to have been more negatively affected by the pandemic compared to patients from Singapore. This study highlights patients' perceptions of the impact of COVID-19 on eye care, perceived risks, ease of access to care and attitudes towards eye care during the pandemic. Patients' perceptions are integral in developing strategies for the best care possible. There were heterogeneous responses amongst our patients; hence, there may be a role for more individualized healthcare strategies in the future.
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Affiliation(s)
- Rebecca Low
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, 308433, Singapore
| | - Jia Min Lee
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, 308433, Singapore
| | - Ser Sei Lai
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, 308433, Singapore
| | - Andrés Rousselot
- Consultorios Oftalmologicos Benisek Ascarza, Buenos Aires, Argentina
| | | | - Rupesh Agrawal
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, 308433, Singapore.
- Singapore Eye Research Institute, Singapore, Singapore.
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.
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15
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Lee JM, Hwang SH, Lee KB, Byun JI, Hwang HY. Standardization of 129I using the movable 4πβ(LS)-X(NaI(Tl)) system. Appl Radiat Isot 2021; 179:110022. [PMID: 34781075 DOI: 10.1016/j.apradiso.2021.110022] [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: 06/06/2021] [Revised: 10/13/2021] [Accepted: 11/05/2021] [Indexed: 11/28/2022]
Abstract
The 129I standardization, using the movable 4πβ(LS)-X(NaI(Tl)) coincidence system, was performed for two 129I radioactive sources - one was dissolved in 0.1M NaOH solution and the other in 0.1M HNO3 solution. The system incorporates three movable PM tubes for a β-counter placed on a plane and a X-ray detector that can be moved up to the bottom of the vial. The β-efficiency depending on the amount of radioactive solution was investigated with 14 liquid scintillation samples prepared by gravimetrically dispensing 4.4-145 mg of 129I radioactive solution. The β-efficiencies above 90% were observed at less than 56 mg, but it was at most 70% at 145 mg. This occurred regardless of the activity of the sample or the type of chemical solution used to dissolve 129I source. The activity concentration of each 129I source was determined by efficiency-extrapolation method for samples with an activity range of 0.28-4.5 kBq. The β-efficiency points were derived over 10 intervals by moving 3-PM tubes in fine steps of about 1 mm from the sample. The highest value for β-efficiency was 95%. The combined uncertainty were 0.25% and 0.26%, respectively. The stated precision obtained using the system is better than that previously reported in the literature obtained by the triple to double coincidence ratio (TDCR) or the CIEMAT/NIST efficiency tracing method.
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Affiliation(s)
- J M Lee
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - S H Hwang
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - K B Lee
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - J I Byun
- Korea Institute of Nuclear Safety, Gwahak-ro, Yuseong-gu, Daejeon, 62, South Korea
| | - H Y Hwang
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea.
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16
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Soetedjo AAP, Lee JM, Lau HH, Goh GL, An J, Koh Y, Yeong WY, Teo AKK. Tissue engineering and 3D printing of bioartificial pancreas for regenerative medicine in diabetes. Trends Endocrinol Metab 2021; 32:609-622. [PMID: 34154916 DOI: 10.1016/j.tem.2021.05.007] [Citation(s) in RCA: 3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 05/17/2021] [Accepted: 05/24/2021] [Indexed: 02/08/2023]
Abstract
Diabetes is a severe chronic disease worldwide. In various types of diabetes, the pancreatic beta cells fail to secrete sufficient insulin, at some point, to regulate blood glucose levels. Therefore, the replacement of dysfunctional pancreas, islets of Langerhans, or even the insulin-secreting beta cells facilitates physiological regulation of blood glucose levels. However, the current lack of sufficient donor human islets for cell replacement therapy precludes a routine and absolute cure for most of the existing diabetes cases globally. It is envisioned that tissue engineering of a bioartificial pancreas will revolutionize regenerative medicine and the treatment of diabetes. In this review, we discuss the anatomy and physiology of the pancreas, and identify the clinical considerations for engineering a bioartificial pancreas. Subsequently, we dissect the bioengineering problem based on the design of the device, the biomaterial used, and the cells involved. Last but not least, we highlight current tissue engineering challenges and explore potential directions for future work.
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Affiliation(s)
- Andreas Alvin Purnomo Soetedjo
- Stem Cells and Diabetes Laboratory, Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore; Integrative Sciences and Engineering Programme, NUS Graduate School, National University of Singapore, Singapore
| | - Jia Min Lee
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
| | - Hwee Hui Lau
- Stem Cells and Diabetes Laboratory, Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore
| | - Guo Liang Goh
- Singapore Centre for 3D Printing (SC3DP), School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
| | - Jia An
- Singapore Centre for 3D Printing (SC3DP), School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
| | - Yexin Koh
- Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, Singapore
| | - Wai Yee Yeong
- Singapore Centre for 3D Printing (SC3DP), School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
| | - Adrian Kee Keong Teo
- Stem Cells and Diabetes Laboratory, Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore; Department of Biochemistry and Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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17
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Tsauo J, Noh SY, Shin JH, Gwon DI, Han K, Lee JM, Jeon UB, Kim YH. Retrograde transvenous obliteration for the prevention of variceal rebleeding in patients with hepatocellular carcinoma: a multicentre retrospective study. Clin Radiol 2021; 76:681-687. [PMID: 34140137 DOI: 10.1016/j.crad.2021.05.011] [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] [Received: 12/23/2020] [Accepted: 05/14/2021] [Indexed: 12/14/2022]
Abstract
AIM To evaluate the effectiveness and safety of retrograde transvenous obliteration (RTO) for the prevention of variceal rebleeding variceal rebleeding in patients with hepatocellular carcinoma (HCC). MATERIALS AND METHODS This multicentre retrospective study enrolled 79 patients with HCC who underwent RTO for the prevention of variceal rebleeding. Successful occlusion of the gastrorenal shunt and obliteration of the gastric varices were achieved in 74 patients, with a technical success rate of 93.7%. Of the remaining 74 patients (mean age, 64.9±10.3 years; 56 men), 66 (90.4%) had gastroesophageal varices and seven (9.6%) had isolated gastric varices. Thirty-two patients (43.8%) underwent balloon-occluded RTO, 40 patients (54.8%) underwent plug-assisted RTO, and one patient (1.4%) underwent coil-assisted RTO. No patients had major procedural complications. RESULTS Rebleeding occurred in seven patients (9.6%) during the follow-up period. The 6-week and 1-year actuarial probabilities of patients remaining free of rebleeding were 90.8±3.6% and 88.6±4.1%, respectively. The median survival was 12.6 (95% confidence interval [CI] 8-17.3) months. The 6-week, 1-year, and 3-year actuarial probabilities of survival were 83.2±4.4%, 51.1±6.6%, and 32.7±7%, respectively. New or worsening ascites and oesophageal varices occurred in 12 (16.4%) and 13 patients (17.8%), respectively, during the follow-up period. Overt hepatic encephalopathy occurred in one patient (1.4%) during the follow-up period. The Child-Pugh score remained comparable to that at baseline at 1 and 3 months. CONCLUSION RTO was effective and safe in preventing variceal rebleeding in patients with HCC.
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Affiliation(s)
- J Tsauo
- Department of Interventional Therapy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - S Y Noh
- Department of Radiology, Kyung Hee University Seoul Hospital, Seoul, South Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
| | - D I Gwon
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - K Han
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - J M Lee
- Department of Radiology, Soonchunhyang University Hospital, Bucheon, South Korea
| | - U B Jeon
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Y H Kim
- Department of Radiology, Daegu Catholic University Medical Center, Daegu, South Korea
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18
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Lee JM, Agung A, Hwang SH, Lee KB, Hwang HY. Development of a movable 4πβ(LS)-γ coincidence counting system for activity standardization of β-γ emitters. Appl Radiat Isot 2021; 174:109743. [PMID: 33915348 DOI: 10.1016/j.apradiso.2021.109743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 06/08/2020] [Revised: 12/23/2020] [Accepted: 04/20/2021] [Indexed: 11/30/2022]
Abstract
A new movable 3PM-γ coincidence system, based on 4πβ(LS)-γ coincidence counting, for activity measurement of β-γ emitters has been designed at the Korea Research Institute of Standards and Science (KRISS). The system incorporates 3 PM tubes on the plane and two detectors placed above and below the center of the plane. The 3 PM tubes for β-counters in the plane are movable up to 100 mm from a liquid scintillation vial, thus enabling the variation of β-detection efficiencies by a geometrical technique. A NaI(Tl) γ-counter was set above for the present work. The β-event is determined by counting the logical sum of three double coincidences. All the necessary electronics, i.e., logical sum, adjusting the duration of dead-time of each counting channel and coincidence resolving times, and analyzing coincidence relation, were specially designed to be fabricated in an integrated circuit. Details of the detectors, the electronics, the overall movable 3PM-γ coincidence system are presented, as well as the results of investigations to assess its operating characteristics. Validation measurements have been performed with 60Co and 57Co sources. The highest β-detection efficiency achieved with 60Co and 57Co was 97% and 95%, respectively. The activity concentration determined with a new system agreed with calibrated values within the uncertainty range. Further results from validation measurements and the corresponding uncertainty budgets are presented.
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Affiliation(s)
- J M Lee
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - A Agung
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - S H Hwang
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - K B Lee
- Korea Research Institute of Standards and Science, Gajeong-ro, Yuseong-gu, Daejeon, 267, South Korea
| | - H Y Hwang
- Mokwon University, Doanbuk-ro, Seo-gu, Daejeon, 88, South Korea.
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19
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Betzler BK, Ding J, Wei X, Lee JM, Grewal DS, Fekrat S, Sadda SR, Zarbin MA, Agarwal A, Gupta V, Schmetterer L, Agrawal R. Choroidal vascularity index: a step towards software as a medical device. Br J Ophthalmol 2021; 106:149-155. [PMID: 33514528 DOI: 10.1136/bjophthalmol-2021-318782] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 01/07/2021] [Accepted: 01/09/2021] [Indexed: 11/04/2022]
Abstract
The choroidal vascularity index (CVI) is a relatively new parameter, calculated off optical coherence tomography (OCT) images, for the quantitative evaluation of choroid vascularity. It is defined as the ratio of vascular area to the total choroidal area, presented as a percentage. The choroid is an important vascular bed, often implicated in ocular and systemic conditions. Since the introduction of CVI, multiple studies have evaluated its efficacy as a tool for disease prognostication and monitoring progression, with promising results. The CVI was born out of the need for more robust and accurate evaluations of choroidal vasculature, as prior parameters such as choroidal thickness and choroidal vessel diameter had their limitations. In this review, we summarise current literature on the CVI, explain how the CVI is derived and explore its potential integration into future research and translation into clinical care. This includes the application of CVI in various disease states, and ongoing attempts to produce an automated algorithm which can calculate CVI from OCT images.
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Affiliation(s)
| | - Jianbin Ding
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Xin Wei
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore
| | - Jia Min Lee
- National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore
| | - Dilraj S Grewal
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Sharon Fekrat
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Srinivas R Sadda
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Marco A Zarbin
- Rutgers-New Jersey Medical School, Rutgers University, Newark, New Jersey, USA
| | - Aniruddha Agarwal
- Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Vishali Gupta
- Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Leopold Schmetterer
- Singapore Eye Research Institute, Singapore National Eye Center, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore.,SERI-NTU Advanced Ocular Engineering (STANCE), Singapore
| | - Rupesh Agrawal
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore .,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore.,Singapore Eye Research Institute, Singapore National Eye Center, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore
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20
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Oh JY, Song CY, Ko YJ, Lee JM, Kang WN, Yang DS, Kang B. Strong correlation between flux pinning and epitaxial strain in the GdBa 2Cu 3O 7-x /La 0.7Sr 0.3MnO 3 nanocrystalline heterostructure. RSC Adv 2020; 10:39102-39108. [PMID: 35518394 PMCID: PMC9057360 DOI: 10.1039/d0ra06431a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/19/2020] [Indexed: 11/24/2022] Open
Abstract
The effect of magnetic flux pinning is investigated in GdBa2Cu3O7 (GdBCO) thin films with two different types of ferromagnetic La0.7Sr0.3MnO3 (LSMO) buffers (nanoparticles and a layer) deposited on an STO substrate. Magnetization analyses reveal the presence of multiple flux pinning mechanisms responsible for the improvement in the critical current density of GdBCO films. While core pinning becomes a dominant pinning mechanism in GdBCO films with LSMO nanoparticles, a hybrid effect of magnetic-volume and core-point pinning is observed in GdBCO films with LSMO layers. Examinations of local structures for both LSMO and GdBCO using extended X-ray absorption fine structure spectroscopy (EXAFS) exhibit a close relation between the parameters in the pinning force scaling and the length ratio of the Mn–O bond to the Cu–O bond. This result implies that the origin of core pinning is probably attributed to epitaxial strain induced by lattice mismatch between LSMO and GdBCO. Therefore, an appropriate strain state of LSMO is required for an effective operation of magnetic pinning. The effect of magnetic flux pinning is investigated in GdBa2Cu3O7 (GdBCO) thin films with two different types of ferromagnetic La0.7Sr0.3MnO3 (LSMO) buffers (nanoparticles and a layer) deposited on an STO substrate.![]()
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Affiliation(s)
- J Y Oh
- Department of Physics, Chungbuk National University Cheongju Korea +82 43 274 7811 +82 43 261 3394
| | - C Y Song
- Department of Physics, Chungbuk National University Cheongju Korea +82 43 274 7811 +82 43 261 3394
| | - Y J Ko
- Department of Physics, Chungbuk National University Cheongju Korea +82 43 274 7811 +82 43 261 3394
| | - J M Lee
- Department of Physics, Sungkyunkwan University Suwon Korea
| | - W N Kang
- Department of Physics, Sungkyunkwan University Suwon Korea
| | - D S Yang
- Department of Physics Education, Chungbuk National University Cheongju Korea
| | - B Kang
- Department of Physics, Chungbuk National University Cheongju Korea +82 43 274 7811 +82 43 261 3394
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21
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Lee JM, Suen SKQ, Ng WL, Ma WC, Yeong WY. Bioprinting of Collagen: Considerations, Potentials, and Applications. Macromol Biosci 2020; 21:e2000280. [PMID: 33073537 DOI: 10.1002/mabi.202000280] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/21/2020] [Indexed: 12/15/2022]
Abstract
Collagen is the most abundant extracellular matrix protein that is widely used in tissue engineering (TE). There is little research done on printing pure collagen. To understand the bottlenecks in printing pure collagen, it is imperative to understand collagen from a bottom-up approach. Here it is aimed to provide a comprehensive overview of collagen printing, where collagen assembly in vivo and the various sources of collagen available for TE application are first understood. Next, the current printing technologies and strategy for printing collagen-based materials are highlighted. Considerations and key challenges faced in collagen printing are identified. Finally, the key research areas that would enhance the functionality of printed collagen are presented.
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Affiliation(s)
- Jia Min Lee
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Sean Kang Qiang Suen
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wei Long Ng
- HP-NTU Digital Manufacturing Corporate Lab, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wai Cheung Ma
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wai Yee Yeong
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.,HP-NTU Digital Manufacturing Corporate Lab, 50 Nanyang Avenue, Singapore, 639798, Singapore
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22
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Moiseev S, Lee JM, Zykova A, Bulanov N, Novikov P, Gitel E, Bulanova M, Safonova E, Shin JI, Kronbichler A, Jayne DRW. The alternative complement pathway in ANCA-associated vasculitis: further evidence and a meta-analysis. Clin Exp Immunol 2020; 202:394-402. [PMID: 32691878 DOI: 10.1111/cei.13498] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [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: 06/14/2020] [Revised: 07/12/2020] [Accepted: 07/12/2020] [Indexed: 12/11/2022] Open
Abstract
We compared the common pathway components C3a, C5a and membrane attack complex (MAC), also known as C5b-9, and the alternative pathway components factor B and properdin in patients with ANCA-associated vasculitis (AAV) and healthy controls, and conducted a meta-analysis of the available clinical evidence for the role of complement activation in the pathogenesis of AAV. Complement components were evaluated in 59 patients with newly diagnosed or relapsing granulomatosis with polyangiitis or microscopic polyangiitis and 36 healthy volunteers. In 28 patients, testing was repeated in remission. Next, we performed a meta-analysis by searching databases to identify studies comparing complement levels in AAV patients and controls. A random-effects model was used for statistical analyses. The median concentrations of MAC, C5a, C3a and factor B were higher in active AAV patients (P < 0·001). Achievement of remission was associated with reductions in C3a (P = 0·005), C5a (P = 0·035) and factor B levels (P = 0·045), whereas MAC and properdin levels did not change. In active AAV, there were no effects of ANCA specificity, disease phenotype, previous immunosuppression or disease severity on complement levels. A total of 1122 articles were screened, and five studies, including this report, were entered into the meta-analysis. Plasma MAC, C5a and factor B in patients with active AAV were increased compared to patients in remission (excluding factor B) and controls. Changes in C3a were of borderline significance. Our findings and the results of the meta-analysis support activation of the complement system predominantly via the alternative pathway in AAV patients.
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Affiliation(s)
- S Moiseev
- Tareev Clinic of Internal Diseases, Sechenov First Moscow State Medical University, Moscow, Russia.,Lomonosov Moscow State University, Moscow, Russia
| | - J M Lee
- Department of Pediatrics, Chungnam National University Hospital and College of Medicine, Daejeon, Korea
| | - A Zykova
- Tareev Clinic of Internal Diseases, Sechenov First Moscow State Medical University, Moscow, Russia.,Lomonosov Moscow State University, Moscow, Russia
| | - N Bulanov
- Tareev Clinic of Internal Diseases, Sechenov First Moscow State Medical University, Moscow, Russia
| | - P Novikov
- Tareev Clinic of Internal Diseases, Sechenov First Moscow State Medical University, Moscow, Russia
| | - E Gitel
- Central Laboratory, Sechenov First Moscow State Medical University, Moscow, Russia
| | - M Bulanova
- Vladimir Regional Clinical Hospital, Vladimir, Russia
| | - E Safonova
- Lomonosov Moscow State University, Moscow, Russia
| | - J I Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, South Korea.,Division of Pediatric Nephrology, Severance Children's Hospital, Seoul, South Korea.,Institute of Kidney Disease Research, Yonsei University College of Medicine, Seoul, South Korea
| | - A Kronbichler
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Innsbruck, Austria
| | - D R W Jayne
- Department of Medicine, University of Cambridge, Cambridge, UK
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23
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Dela Rue B, Lee JM, Eastwood CR, Macdonald KA, Gregorini P. Short communication: Evaluation of an eating time sensor for use in pasture-based dairy systems. J Dairy Sci 2020; 103:9488-9492. [PMID: 32747112 DOI: 10.3168/jds.2020-18173] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 01/07/2020] [Accepted: 05/19/2020] [Indexed: 11/19/2022]
Abstract
The assessment of grazing behavior is important for research and practice in pasture-grazed dairy farm systems. However, few devices are available that enable assessment of cow grazing behavior at an individual animal level. This study investigated whether commercially available Smarttag "eating time" sensors (Nedap Livestock Management, Groenlo, the Netherlands) were suitable for recording the grazing time of cows. Smarttag sensors were mounted on the neck collars of multiparous Holstein-Friesian cows in a herd in Taranaki, New Zealand. Cows were randomly selected each observation day from the milking herd for 8 separate days across a 1-mo period. Trained observers conducted 90-min observation periods to evaluate the relationship between the sensor eating time measure and grazing time. A set of 5 defined cow behaviors (2 "head up" and 3 "head down" behaviors) were assessed. In total, observations of 37 cows were recorded in 14 sessions over 8 d in the study period, providing 55.5 total hours of observations. Observation data were aligned with sensor data according to the sensor time stamps and grouped into matching 15-min intervals. Interobserver reliability was assessed both before and after the main trial period, and the mean percentage eating time per observer had a coefficient of variation of 0.46% [mean 93.2, standard deviation (SD) 0.425] before and 0.07% (mean 96.3, SD 0.074) after. In the main trial, the relationship between observed (mean 70.8%) and sensor-derived (mean 69.3%) percentage eating time over the observation period gave a Pearson correlation coefficient of 0.971, concordance correlation coefficient 0.968, mean difference 1.50% points, and SD 5.8% points. Therefore, sensor-identified percentage "eating time" and observed percentage active grazing time were shown to be both very well correlated and concordant (in agreement, with high correlation and little bias). Therefore, the relationship between observed and sensor-derived data had a high degree of agreement for identifying cow grazing activity. In conclusion, Smarttag sensors are a valid and useful tool for estimating grazing activity at time periods of 1 h or more.
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Affiliation(s)
- B Dela Rue
- DairyNZ Ltd., Private Bag 3221, Hamilton 3240, New Zealand
| | - J M Lee
- DairyNZ Ltd., Private Bag 3221, Hamilton 3240, New Zealand
| | - C R Eastwood
- DairyNZ Ltd., Private Bag 3221, Hamilton 3240, New Zealand.
| | - K A Macdonald
- DairyNZ Ltd., Private Bag 3221, Hamilton 3240, New Zealand
| | - P Gregorini
- Lincoln University, Department of Agricultural Sciences, Faculty of Agricultural and Life Sciences, Lincoln 7647, Christchurch, New Zealand
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24
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Lee JM, Yeong WY. Engineering macroscale cell alignment through coordinated toolpath design using support-assisted 3D bioprinting. J R Soc Interface 2020; 17:20200294. [PMID: 32674709 DOI: 10.1098/rsif.2020.0294] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aligned cells provide direction-dependent mechanical properties that influence biological and mechanical function in native tissues. Alignment techniques such as casting and uniaxial stretching cannot fully replicate the complex fibre orientation of native tissue such as the heart. In this study, bioprinting is used to direct the orientation of cell alignment. A 0°-90° grid structure was printed to assess the robustness of the support-assisted bioprinting technique. The variation in the angles of the grid pattern is designed to mimic the differences in fibril orientation of native tissues, where angles of cell alignment vary across the different layers. Through bioprinting of a cell-hydrogel mixture, C2C12 cells displayed directed alignment along the longitudinal axis of printed struts. Cell alignment is induced through firstly establishing structurally stable constructs (i.e. distinct 0°-90° structures) and secondly, allowing cells to dynamically remodel the bioprinted construct. Herein reports a method of inducing a macroscale level of controlled cell alignment with angle variation. This was not achievable both in terms of methods (i.e. conventional alignment techniques such as stretching and electrical stimulation) and magnitude (i.e. hydrogel features with less than 100 µm features).
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Affiliation(s)
- Jia Min Lee
- Singapore Centre for 3D Printing (SC3DP), Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Wai Yee Yeong
- Singapore Centre for 3D Printing (SC3DP), Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 639798, Singapore
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25
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Seon Y, Hwang SH, Lee JM, Lee KB, Heo DH, Han MJ, Kim HJ. The primary system for measurement of beta emitting radioactive gases at KRISS. Appl Radiat Isot 2020; 164:109238. [PMID: 32554125 DOI: 10.1016/j.apradiso.2020.109238] [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: 03/28/2019] [Revised: 04/10/2020] [Accepted: 05/18/2020] [Indexed: 11/30/2022]
Abstract
Korea Research Institute of Standards and Science (KRISS) is developing a length-compensated proportional counting (LCPC) system as a primary system for standardization of beta emitting radioactive gases. The pilot experiment was performed with 85Kr and the optimized high voltage and pressure were found to be 1700 V and 0.203 MPa, respectively. The total activity of 85Kr was deduced by the length compensation of each count. The expanded uncertainty was estimated to be around 0.8% (k = 2) for the 85Kr measurement.
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Affiliation(s)
- Y Seon
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; Department of Physics, Kyungpook National University, Daegu, 41566, South Korea
| | - S H Hwang
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea.
| | - J M Lee
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - K B Lee
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - D H Heo
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea
| | - M J Han
- Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, South Korea; University of Science & Technology (UST), Daejeon, 34113, South Korea
| | - H J Kim
- Department of Physics, Kyungpook National University, Daegu, 41566, South Korea
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26
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Kim BJ, Lee KB, Lee JM, Hwang SH, Heo DH, Han KH. Design of optimal digital filter and digital signal processing for a CdZnTe high resolution gamma-ray system. Appl Radiat Isot 2020; 162:109171. [PMID: 32501226 DOI: 10.1016/j.apradiso.2020.109171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 09/20/2019] [Accepted: 04/03/2020] [Indexed: 11/18/2022]
Abstract
We have developed an online digital signal processing system based on an FPGA. The system consists of pile-up rejection, baseline restorer, peak detection and pole-zero cancellation for evaluation of deposited energy in the detector. The shaping algorithm employed is a Moving Window Deconvolution (MWD) to shape digitized data into a trapezoidal form. For the purpose of verification, the developed digital system was tested for 137Cs gamma rays. The entire system is programmed using the LabVIEW environment.
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Affiliation(s)
- B J Kim
- Ionizing Radiation Center, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea; University of Science & Technology (UST), Daejeon, 34113, Republic of Korea
| | - K B Lee
- Ionizing Radiation Center, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea; University of Science & Technology (UST), Daejeon, 34113, Republic of Korea.
| | - J M Lee
- Ionizing Radiation Center, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea; University of Science & Technology (UST), Daejeon, 34113, Republic of Korea
| | - S H Hwang
- Ionizing Radiation Center, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea
| | - D H Heo
- Ionizing Radiation Center, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea
| | - K H Han
- ULS Co., Ltd., Daejeon, 34186, Republic of Korea
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27
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Abstract
BACKGROUND: Long-term mortality following tuberculosis (TB) diagnosis in Korea remains unclear.METHODS: The present study used data from the National Health Insurance Service database, an extensive health-related database including most Korean residents. TB patients were identified using International Classification of Diseases, Tenth Revision coding (A15-19, U88.0-88.1) and the type of anti-TB drug(s) between 2003 and 2016. Long-term mortality and causes of death in TB patients were analysed.RESULTS: A total of 357 211 individuals had TB over the period from 2003 to 2016 and 103 682 died. The mean age of the cohort was 54.7 ± 20.7 years, and 59.8% were male. The survival probability of TB patients at 1, 5, and 10 years after diagnosis was 87.8%, 75.3%, and 63.3%, respectively. High mortality and TB-related death rates were especially prominent in the early stages after TB diagnosis. The overall standardized mortality ratio of TB patients to the general Korean population was 3.23 (95% confidence interval 3.21-3.25).CONCLUSION: Mortality in TB patients was especially high in the early stages of disease after TB diagnosis, and mostly due to TB. This figure was approximately three-times higher than the mortality rate in the general population.
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Affiliation(s)
- S C Park
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - M J Kang
- Research Institute, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - C H Han
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - S M Lee
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - C J Kim
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - J M Lee
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - Y A Kang
- Division of Pulmonology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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28
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Lee JM, Wasserman RJ, Gan JY, Wilson RF, Rahman S, Yek SH. Human Activities Attract Harmful Mosquitoes in a Tropical Urban Landscape. Ecohealth 2020; 17:52-63. [PMID: 31786667 DOI: 10.1007/s10393-019-01457-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
Knowledge of the interrelationship of mosquito communities and land use changes is of paramount importance to understand the potential risk of mosquito disease transmission. This study examined the effects of land use types in urban, peri-urban and natural landscapes on mosquito community structure to test whether the urban landscape is implicated in increased prevalence of potentially harmful mosquitoes. Three land use types (park, farm, and forest nested in urban, peri-urban and natural landscapes, respectively) in Klang Valley, Malaysia, were surveyed for mosquito larval habitat, mosquito abundance and diversity. We found that the nature of human activities in land use types can increase artificial larval habitats, supporting container-breeding vector specialists such as Aedes albopictus, a dengue vector. In addition, we observed a pattern of lower mosquito richness but higher mosquito abundance, characterised by the high prevalence of Ae. albopictus in the urban landscape. This was also reflected in the mosquito community structure whereby urban and peri-urban landscapes were composed of mainly vector species compared to a more diverse mosquito composition in natural landscape. This study suggested that good environmental management practices in the tropical urban landscape are of key importance for effective mosquito-borne disease management.
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Affiliation(s)
- J M Lee
- School of Science, Monash University Malaysia, Building 4, Level 8, Room 36 (4-8-36), Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
- Tropical Medicine and Biology Platform, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - R J Wasserman
- School of Science, Monash University Malaysia, Building 4, Level 8, Room 36 (4-8-36), Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
- Department of Biology and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana
| | - J Y Gan
- School of Science, Monash University Malaysia, Building 4, Level 8, Room 36 (4-8-36), Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - R F Wilson
- School of Science, Monash University Malaysia, Building 4, Level 8, Room 36 (4-8-36), Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - S Rahman
- School of Science, Monash University Malaysia, Building 4, Level 8, Room 36 (4-8-36), Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
- Tropical Medicine and Biology Platform, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - S H Yek
- School of Science, Monash University Malaysia, Building 4, Level 8, Room 36 (4-8-36), Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia.
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29
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Ng WL, Lee JM, Zhou M, Chen YW, Lee KXA, Yeong WY, Shen YF. Vat polymerization-based bioprinting-process, materials, applications and regulatory challenges. Biofabrication 2020; 12:022001. [PMID: 31822648 DOI: 10.1088/1758-5090/ab6034] [Citation(s) in RCA: 159] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Over the years, the field of bioprinting has attracted attention for its highly automated fabrication system that enables the precise patterning of living cells and biomaterials at pre-defined positions for enhanced cell-matrix and cell-cell interactions. Notably, vat polymerization (VP)-based bioprinting is an emerging bioprinting technique for various tissue engineering applications due to its high fabrication accuracy. Particularly, different photo-initiators (PIs) are utilized during the bioprinting process to facilitate the crosslinking mechanism for fabrication of high-resolution complex tissue constructs. The advancements in VP-based printing have led to a paradigm shift in fabrication of tissue constructs from cell-seeding of tissue scaffolds (non-biocompatible fabrication process) to direct bioprinting of cell-laden tissue constructs (biocompatible fabrication process). This paper, presenting a first-time comprehensive review of the VP-based bioprinting process, provides an in-depth analysis and comparison of the various biocompatible PIs and highlights the important considerations and bioprinting requirements. This review paper reports a detailed analysis of its printing process and the influence of light-based curing modality and PIs on living cells. Lastly, this review also highlights the significance of VP-based bioprinting, the regulatory challenges and presents future directions to transform the VP-based printing technology into imperative tools in the field of tissue engineering and regenerative medicine. The readers will be informed on the current limitations and achievements of the VP-based bioprinting techniques. Notably, the readers will realize the importance and value of highly-automated platforms for tissue engineering applications and be able to develop objective viewpoints towards this field.
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Affiliation(s)
- Wei Long Ng
- HP-NTU Digital Manufacturing Corporate Lab, 50 Nanyang Avenue, 639798, Singapore. Singapore Centre for 3D Printing (SC3DP), School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, 639798, Singapore
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30
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Hwang I, Lee JM, Park JB, Yoon YE, Lee SP, Kim HK, Kim YJ, Cho GY, Park SJ, Kim KH, Hong GR. P1368 Effect of angiotensin receptor blocker in patients with moderate or severe aortic stenosis: a randomized controlled trial. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.803] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
This study was supported by grants from Boryung Pharmacy Research Fund.
Background/Introduction: Pathophysiology of aortic stenosis (AS) and several previous studies suggested the potential role of angiotensin receptor blocker (ARB) in patients with AS.
Purpose
We aimed to investigate the effects of Fimasartan, an ARB, on exercise capacity and progression of AS in patients with moderate to severe AS.
Methods
We conducted a prospective, randomized, double-blind, placebo-controlled trial in 32 normotensive or controlled-hypertensive patients with moderate or severe AS. Study participants were randomized to Fimasartan 30 mg to 60 mg daily (n = 14) or placebo (n = 18) for 1 year, and underwent cardiopulmonary exercise test, 6-minute walk test, and echocardiography at 0, 6, and 12 months, with follow-up data available in 29 subjects.
Results
Significant reductions in blood pressures were observed in the Fimasartan group but not in the placebo group. Two of the 14 patients in the Fimasartan group withdrew the study due to mild symptoms probably related with the decreased blood pressure, and one patient decline the study protocol. After the 12-month treatment, the peak oxygen consumption (VO2; the primary outcome) in the Fimasartan group was significantly decreased (from 28.3 ± 5.9 to 25.4 ± 3.8 mL/min/kg, P = 0.021) but not in the placebo group (P for interaction = 0.046) (Figure 1A). The severity of AS showed a gradual progression in both groups, without inter-group differences (mean transaortic pressure; Fimasartan group, +4.0 ± 3.8 mmHg/year; placebo group, +5.3 ± 6.2 mmHg/year; P for interaction = 0.429) (Figure 1B). Parameters of left ventricular systolic and diastolic function did not change in both groups.
Conclusions
The use of ARB impaired exercise capacity in patients with moderate or severe AS, and did not prevent the progression of AS. However, due to the small number of participants, further studies are required to confirm these findings.
Abstract P1368 Figure.
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Affiliation(s)
- I Hwang
- Seoul National University Bundang Hospital, Seongnam, Korea (Republic of)
| | - J M Lee
- Samsung Medical Center, Cardiovascular Center, Seoul, Korea (Republic of)
| | - J B Park
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - Y E Yoon
- Seoul National University Bundang Hospital, Seongnam, Korea (Republic of)
| | - S P Lee
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - H K Kim
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - Y J Kim
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - G Y Cho
- Seoul National University Bundang Hospital, Seongnam, Korea (Republic of)
| | - S J Park
- Samsung Medical Center, Cardiovascular Center, Seoul, Korea (Republic of)
| | - K H Kim
- Chonnam National University Hospital, Gwangju, Korea (Republic of)
| | - G R Hong
- Yonsei University College of Medicine, Seoul, Korea (Republic of)
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Lee JM, Seo YJ, Shim DB, Lee HJ, Kim SH. Surgical outcomes of tympanoplasty using a sterile acellular dermal allograft: a prospective randomised controlled study. ACTA ACUST UNITED AC 2019; 38:554-562. [PMID: 30623901 PMCID: PMC6325656 DOI: 10.14639/0392-100x-1839] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 05/14/2018] [Indexed: 11/23/2022]
Abstract
Acellular human dermal allografts have been shown to be effective for soft-tissue implantation. We compared treatment outcomes of tympanoplasty using tragal perichondrium and acellular human dermal allograft (MegaDerm®). In a prospective randomised controlled study, 60 patients scheduled to undergo tympanoplasty were randomly assigned to the autologous tragal perichondrium group (n = 33) or acellular human dermal allograft group (n = 27). Postoperative hearing gain, graft success rate at 1 and 6 months and operation times were compared between groups. Graft success rate, defined as the complete closure of tympanic membrane perforation, did not show any significant intergroup difference (75.8% vs 85.2%, p = 0.519). Air conduction thresholds and air-bone gaps showed significant improvements in both groups; from 38.7 ± 15.9 dB to 30.2 ± 15.6 dB (p < 0.001) and from 17.8 ± 7.3 dB to 11.5 ± 7.0 (p = 0.001) in the autologous tragal perichondrium group, and from 30.4 ± 12.2 dB to 24.5 ± 13.0 dB (p = 0.006) and from 14.3 ± 5.1 dB to 7.6 ± 4.6 dB (p < 0.001) in the acellular human dermal allograft group. The amount of hearing gain (p = 0.31) and closure of air-bone gap (p = 0.863) were not meaningfully different between groups. The mean operation time was significantly lower in the acellular human dermal allograft group (35.2 min vs 27.4 min, p = 0.039). In this prospective randomised controlled study, acellular human dermal allograft was shown to be an effective alternative to tragal perichondrium, with similar graft success rates and postoperative hearing results, but with reduced operation times.
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Affiliation(s)
- J M Lee
- Department of Otorhinolaryngology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Y J Seo
- Department of Otorhinolaryngology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - D B Shim
- Department of Otorhinolaryngology, Myongji Hospital, Goyang, Korea
| | - H J Lee
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - S H Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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Huang SW, Liu YT, Lee JM, Chen JM, Lee JF, Schoenlein RW, Chuang YD, Lin JY. Polaronic effect in the x-ray absorption spectra of La 1-x Ca x MnO 3 manganites. J Phys Condens Matter 2019; 31:195601. [PMID: 30848247 DOI: 10.1088/1361-648x/ab05a2] [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: 06/09/2023]
Abstract
X-ray absorption spectroscopy (XAS) is performed to study changes in the electronic structures of colossal magnetoresistance (CMR) and charged ordered (CO) La1-x Ca x MnO3 manganites with respect to temperature. The pre-edge features in O and Mn K-edge XAS spectra, which are highly sensitive to the local distortion of MnO6 octahedral, exhibit contrasting temperature dependence between CMR and CO samples. The seemingly counter-intuitive XAS temperature dependence can be reconciled in the context of polarons. These results help identify the most relevant orbital states associated with polarons and highlight the crucial role played by polarons in understanding the electronic structures of manganites.
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Affiliation(s)
- S W Huang
- MAX IV Laboratory, Lund University, PO Box 118, 221 00 Lund, Sweden. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
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Wernli KJ, Callaway KA, Henderson LM, Kerlikowske K, Lee JM, Ross-Degnan D, Wallace JK, Wharam JF, Zhang F, Stout NK. Trends in Breast MRI Use Among Women with BRCA Mutations: A National Claims Analysis 2006–2016. Cancer Epidemiol Biomarkers Prev 2019. [DOI: 10.1158/1055-9965.epi-19-0079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Women with BRCA mutations are recommended to receive breast MRI as an adjunct to annual mammography for breast cancer screening however adoption of these guidelines is unclear. We estimated breast MRI use from 2006–2016 among insured US women to understand use over time. Methods: Using medical care claims, we conducted a cohort study of breast MRI use in commercially-insured women aged 20–64 years continuously enrolled for ≥1 year in a large national insurer between 2006–2016. Women were identified as BCRA mutation carriers without a personal history of breast cancer using ICD9/10 diagnosis codes. We used CPT codes to identify breast MRIs and developed claims-based algorithms to categorized MRI indication as: screening, diagnostic or other. We calculated annual age-specific and age-adjusted rates of use overall and by indication among BCRA mutation carrier women. We used autoregressive time series models to estimate the yearly trend. Results: We identified 12,457 women with BRCA mutations during the study period. Breast MRI use overall among BRCA+ women aged 20–64 was 47/1000 women in 2006 and increased on average by 11 MRIs per year to a rate of 174/1000 in 2016 (P < 0.001). Across this time period, use for screening accounted for over 80% of breast MRIs and rates mirrored the overall trend with a 4.8-fold increase from 31/1000 in 2006 to 146/1000 women by 2016. Over the same time period, use of breast MRI for diagnostic workup or other indications remained stable. Use of screening breast MRI was highest among older women aged 50–64 compared with women <40 and 40–49 years (in 2016, 189, 95, and 177/1000, respectively) Discussion: Breast MRI screening increased dramatically over the past decade in women with BRCA mutations concordant with clinical guidelines. Additional research is needed to understand use of breast imaging relative to health outcomes for this high-risk population.
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Treekitkarnmongkol W, Solis LM, Kai K, Thompson AM, Tian W, Wistuba II, Sasai K, Jltsumori Y, Sahin AA, Hawke DH, Lee JM, Qin L, Bawa-Khalfe T, Rad R, Wong KK, Abbott CM, Katayama H, Sen S. Abstract P1-05-05: eEF1A2 facilitates PTEN-GSK3β mediated Aurora-A protein degradation during S-G2 phase inactivated in PTEN-deficient breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-05-05] [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: 11/16/2022]
Abstract
Abstract
The AURKA gene, encoding Aurora kinase-A (Aurora-A), is frequently amplified and overexpressed across multiple cancer types correlating with poor prognosis. Although the AURKA gene is frequently amplified in human cancers, underlying mechanism(s) for Aurora-A protein stability through different phases of cell cycle are not well elucidated. Inhibiting the kinase activity and promoting protein degradation are two well-validated conceptual strategies for targeting protein kinases in cancers. Here, we demonstrate that Eukaryotic Elongation Factor 1 Alpha 2 (eEF1A2) facilitates PTEN-GSK3β mediated Aurora-A protein degradation through the SCF complex (SKP1-Cul1-FBXW7) during the S/G2 phase of proliferating cells. In contrast, this mechanism is inactivated in cancer cells accompanying PTEN-GSK3β pathway deficiency. Mechanistically, eEF1A2 interacts with Aurora-A, GSK3β, FBXW7 and Cul1-E3 ligase, as the SCF complex, to facilitate Aurora-A polyubiquitination for 26S proteasomal degradation. eEF1A2 promotes PTEN phosphorylation at T366 and stability, inactivates AKT and activates GSK3β which in turn phosphorylates Aurora-A at S283, S284 and S342. The phosphorylation of Aurora-A at S342 is detected during S/G2 phase of cell mitosis in parallel with eEF1A2-SCF complex formation with active form of GSK3β and neddylated Cul1. Conversely, genetic ablation of EEF1A2 and PTEN, activation of AKT, inhibition of GSK3β, expression of Aurora-A phosphodeficient-mutant attenuates the Aurora-A protein degradation which is corroborated in Aurora-A overexpressing mouse mammary carcinomas and human breast carcinomas. This study identifies a novel mechanism of Aurora-A protein degradation mediated eEF1A2-PTEN-GSK3β pathway and provides a framework for the discovery of Aurora-A therapeutic targets in breast cancer that harbors deficiency of PTEN tumor suppressor pathway.
Citation Format: Treekitkarnmongkol W, Solis LM, Kai K, Thompson AM, Tian W, Wistuba II, Sasai K, Jltsumori Y, Sahin AA, Hawke DH, Lee JM, Qin L, Bawa-Khalfe T, Rad R, Wong KK, Abbott CM, Katayama H, Sen S. eEF1A2 facilitates PTEN-GSK3β mediated Aurora-A protein degradation during S-G2 phase inactivated in PTEN-deficient breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-05-05.
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Affiliation(s)
- W Treekitkarnmongkol
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - LM Solis
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - K Kai
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - AM Thompson
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - W Tian
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - II Wistuba
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - K Sasai
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - Y Jltsumori
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - AA Sahin
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - DH Hawke
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - JM Lee
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - L Qin
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - T Bawa-Khalfe
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - R Rad
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - KK Wong
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - CM Abbott
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - H Katayama
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
| | - S Sen
- The University of Texas M.D. Anderson Cancer Center, Houston, TX; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; University of Ottawa, Ottawa, ON, Canada; Houston Methodist Research Institute, Houston, TX; University of Houston, Houston, TX; Technische Universität München, München, BY, Germany; University of Edinburgh, Edinburgh, United Kingdom
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Cho YY, Lee JH, Chang Y, Nam JY, Cho H, Lee DH, Cho EJ, Lee DH, Yu SJ, Lee JM, Kim YJ, Yoon JH. Comparison of overall survival between antiviral-induced viral suppression and inactive phase chronic hepatitis B patients. J Viral Hepat 2018; 25:1161-1171. [PMID: 29741286 DOI: 10.1111/jvh.12927] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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] [Received: 02/27/2018] [Accepted: 04/09/2018] [Indexed: 12/16/2022]
Abstract
Nucleot(s)ide analogues (NAs) reduce the risk of hepatocellular carcinoma (HCC) in chronic hepatitis B (CHB) patients. However, the risk of HCC is reportedly higher for NA-treated patients than for patients in the inactive CHB phase. This study aimed to compare the long-term outcomes of CHB patients with NA-induced viral suppression and those of patients with inactive CHB. This retrospective study involved 1118 consecutive CHB patients whose HBV DNA level was continuously <2000 IU/mL during follow-up with/without antiviral agents. The patients were classified into inactive CHB (n = 373) or NA groups (n = 745). The primary endpoint was overall survival. Secondary endpoints included development of HCC and other liver-related events. The median duration of follow-up was 41.0 (interquartile range = 26.5-55.0) months. The difference in overall survival between the NA group vs. the inactive CHB group was not significant (hazard ratio [HR] = 0.78; 95% confidence interval [CI] = 0.33-1.85; P = .57). The NA group showed a significantly higher risk of HCC (HR = 3.44; 95% CI = 1.82-6.52; P < .01), but comparable risk for non-HCC liver-related events (HR = 1.02; 95% CI = 0.66-1.59; P = .93), compared with the inactive CHB group. Among patients with cirrhosis, the NA group showed a significantly lower risk of death (HR = 0.31; 95% CI = 0.097-0.998; P = .05) and non-HCC liver-related events (HR = 0.51; 95% CI = 0.31-0.83; P < .01), but a slightly higher risk of HCC (HR = 2.39; 95% CI = 0.85-6.75; P = .09), compared to the inactive CHB group. The overall survival of untreated patients with inactive CHB and of CHB patients achieving viral suppression with NA was comparable. However, NA treatment of cirrhotic patients was significantly associated with longer overall survival and lower risk of liver-related events.
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Affiliation(s)
- Y Y Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea.,Department of Internal Medicine, Chung-Ang University Hospital, Seoul, Korea
| | - J-H Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Y Chang
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J Y Nam
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D H Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea.,Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
| | - E J Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D H Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - S J Yu
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J M Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - Y J Kim
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J-H Yoon
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Lauri FM, Mejia-Renteria H, Lee JM, Van Der Hoeven N, De Waard G, Macaya F, Goto S, Liontou C, Koo BK, Van Royen N, Escaned J. P5511Improving the diagnostic accuracy of quantitative flow ratio (QFR): a proposal of QFR-fractional flow reserve (FFR) hybrid approach. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F M Lauri
- Hospital Clínico San Carlos, Instituto de Investigaciόn Sanitaria Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - H Mejia-Renteria
- Hospital Clinic San Carlos, Interventional Cardiology Department, Madrid, Spain
| | - J M Lee
- Samsung Medical Center, Seoul, Korea Republic of
| | | | - G De Waard
- VU University Medical Center, Amsterdam, Netherlands
| | - F Macaya
- Hospital Clinic San Carlos, Interventional Cardiology Department, Madrid, Spain
| | - S Goto
- Hospital Clinic San Carlos, Interventional Cardiology Department, Madrid, Spain
| | - C Liontou
- Hospital Clinic San Carlos, Interventional Cardiology Department, Madrid, Spain
| | - B K Koo
- Seoul National University Hospital, Seoul, Korea Republic of
| | - N Van Royen
- VU University Medical Center, Amsterdam, Netherlands
| | - J Escaned
- Hospital Clinic San Carlos, Interventional Cardiology Department, Madrid, Spain
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37
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Cho MS, Kim J, Park JK, Kim TH, Lee JM, Park JB, Park HW, Kang KW, Shim JM, Uhm JS, Kim JB, Kim CS, Lee YS, Choi EK, Joung BY. P5796Prevalence and correlates of left atrial enlargement based on left atrial volume index in korean patients with non-valvular atrial fibrillation: data from comparison study of drugs for symptom control. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5796] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M S Cho
- Asan Medical Center, Heart Institute, Seoul, Korea Republic of
| | - J Kim
- Asan Medical Center, Heart Institute, Seoul, Korea Republic of
| | - J K Park
- Hanyang University, Seoul, Korea Republic of
| | - T H Kim
- Yonsei University, Seoul, Korea Republic of
| | - J M Lee
- Kyunghee University, Seoul, Korea Republic of
| | - J B Park
- Ewha University, Seoul, Korea Republic of
| | - H W Park
- Chonnam National University Hospital, Gwangju, Korea Republic of
| | - K W Kang
- Eulji University Hospital, Daejeon, Korea Republic of
| | - J M Shim
- Korea University, Seoul, Korea Republic of
| | - J S Uhm
- Yonsei University, Seoul, Korea Republic of
| | - J B Kim
- Kyunghee University, Seoul, Korea Republic of
| | - C S Kim
- Yonsei University, Seoul, Korea Republic of
| | - Y S Lee
- Catholic University of Daegu, Daegu, Korea Republic of
| | - E K Choi
- Seoul National University, Seoul, Korea Republic of
| | - B Y Joung
- Yonsei University, Seoul, Korea Republic of
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Lee JM, Sing SL, Zhou M, Yeong WY. 3D bioprinting processes: A perspective on classification and terminology. Int J Bioprint 2018; 4:151. [PMID: 33102923 PMCID: PMC7582007 DOI: 10.18063/ijb.v4i2.151] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 06/25/2018] [Indexed: 12/14/2022] Open
Abstract
This article aims to provide further classification of cell-compatible bioprinting processes and examine the concept of 3D bioprinting within the general technology field of 3D printing. These technologies are categorized into four distinct process categories, namely material jetting, vat photopolymerization, material extrusion and free-form spatial printing. Discussion will be presented on the definition of classification with example of techniques grouped under the same category. The objective of this article is to establish a basic framework for standardization of process terminology in order to accelerate the implementation of bioprinting technologies in research and commercial landscape.
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Affiliation(s)
- Jia Min Lee
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Swee Leong Sing
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Miaomiao Zhou
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Wai Yee Yeong
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
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Cho H, Ahn H, Lee DH, Lee JH, Jung YJ, Chang Y, Nam JY, Cho YY, Lee DH, Cho EJ, Yu SJ, Lee JM, Kim YJ, Yoon JH. Entecavir and tenofovir reduce hepatitis B virus-related hepatocellular carcinoma recurrence more effectively than other antivirals. J Viral Hepat 2018; 25:707-717. [PMID: 29316069 DOI: 10.1111/jvh.12855] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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] [Received: 07/06/2017] [Accepted: 11/13/2017] [Indexed: 12/15/2022]
Abstract
Nucleos(t)ide analogues (NAs) have been shown to decrease the risk of hepatocellular carcinoma (HCC) recurrence. This study evaluated whether high-potency NAs (entecavir and tenofovir disoproxil fumarate [TDF]) reduce the risk of tumour recurrence more potently than low-potency NAs after curative treatment of hepatitis B virus (HBV)-related HCC. This study included 607 consecutive HBV-related HCC patients treated with surgical resection or radiofrequency ablation. The patients were categorized into three groups according to antiviral treatment: group A (no antiviral; n = 261), group B (low-potency NA; n = 90) and group C (high-potency NA; n = 256). The primary end-point was recurrence-free survival (RFS). During the duration of follow-up, the median RFS was 29.4, 25.1, and 88.2 months in groups A, B and C, respectively (P < .001, log-rank test). The multivariate Cox analysis indicated that group C had a significantly longer RFS than both group A (adjusted hazard ratio [HR] = 0.39, P < .001) and group B (adjusted HR = 0.47, P < .001). When baseline characteristics were balanced using inverse probability weighting, group C still had a significantly longer RFS than group A (adjusted HR = 0.46, P < .001) and group B (adjusted HR = 0.59, P = .007). Group C had significantly lower risk of viral breakthrough than group B (HR = 0.19, P < .001). Viral breakthrough was an independent risk factor for shorter RFS among groups B and C (adjusted HR = 2.03, P = .007, time-dependent Cox analysis). Antiviral agents with high genetic barrier to resistance (entecavir and TDF) reduced the risk of HCC recurrence compared with other antivirals and no antiviral treatment, especially in patients with high baseline viral load.
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Affiliation(s)
- H Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H Ahn
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D H Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea.,Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
| | - J-H Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Y J Jung
- Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
| | - Y Chang
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J Y Nam
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Y Y Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D H Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - E J Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S J Yu
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J M Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - Y J Kim
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J-H Yoon
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Kim HY, Nam JY, Lee JH, Lee HA, Chang Y, Lee HY, Cho H, Lee DH, Cho YY, Cho EJ, Yu SJ, Lee JM, Kim YJ, Yoon JH. Intensity of surveillance for hepatocellular carcinoma determines survival in patients at risk in a hepatitis B-endemic area. Aliment Pharmacol Ther 2018; 47:1490-1501. [PMID: 29611209 DOI: 10.1111/apt.14623] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 02/01/2018] [Accepted: 03/01/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND Data are insufficient regarding the survival benefit of surveillance for hepatocellular carcinoma (HCC). AIM To investigate the effectiveness of HCC surveillance in a hepatitis B-endemic population. METHODS This retrospective cohort study included 1402 consecutive patients who were newly diagnosed with HCC between 2005 and 2012 at a single tertiary hospital in Korea. The primary endpoint was overall survival. Lead-time and length-time biases were adjusted (sojourn time = 140 days) and sensitivity analyses were performed. RESULTS The most common aetiology was hepatitis B (80.4%). Cirrhosis was present in 78.2%. HCC was diagnosed during regular surveillance (defined as mean interval of ultrasonography <8 months, n = 834), irregular surveillance (n = 104) or nonsurveillance (n = 464). Patients in the regular surveillance group were diagnosed at earlier stages ([very] early stage, 64.4%) than the irregular surveillance (40.4%) or nonsurveillance (26.9%) groups and had more chance for curative treatments (52.4%) than the irregular surveillance (39.4%) or nonsurveillance (23.3%) groups (all P < 0.001). Mortality risk was significantly lower in the regular surveillance group (adjusted hazard ratio [aHR], 0.69; 95% [CI], 0.57-0.83) but not in the irregular surveillance group (aHR, 0.94; 95% CI, 0.69-1.28) compared with the nonsurveillance group after adjusting for confounding factors and lead-time. When the subjects were restricted to cirrhotic patients or Child-Pugh class A/B patients, similar results were obtained for mortality risk reduction between groups. CONCLUSIONS HCC surveillance was associated with longer survival owing to earlier diagnosis and curative treatment. Survival advantage was significant with regular surveillance but not with irregular surveillance.
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Affiliation(s)
- H Y Kim
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Korea
| | - J Y Nam
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J-H Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H A Lee
- Clinical Trial Center, Ewha Womans University Mokdong Hospital, Seoul, Korea
| | - Y Chang
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H Y Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D H Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - Y Y Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - E J Cho
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S J Yu
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J M Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - Y J Kim
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J-H Yoon
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Lee JM, Jeon JH, Moon IS, Choi JY. Benefits of active middle ear implants over hearing aids in patients with sloping high tone hearing loss: comparison with hearing aids. Acta Otorhinolaryngol Ital 2018; 37:218-223. [PMID: 28516965 PMCID: PMC5463512 DOI: 10.14639/0392-100x-1146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 01/15/2017] [Indexed: 11/24/2022]
Abstract
In this retrospective chart review we compared the subjective and objective benefits of active middle ear implants (AMEIs) with conventional hearing aids (HAs) in patients with sloping high tone hearing loss. Thirty-four patients with sensorineural hearing loss were treated with AMEIs. Of these, six had sloping high tone hearing loss and had worn an HA for more than 6 months. Objective assessments, a pure-tone audiogram, as well as a word recognition test, and the Korean version of the Hearing in Noise Test (K-HINT), and a subjective assessment, the Abbreviated Profile of Hearing Aid Benefit (APHAB) questionnaire, were performed. Tests were conducted under three circumstances: 1) the unaided state before surgery; 2) the HA-aided state before surgery; and 3) the AMEI-aided state 3 months after surgery. The average high-frequency hearing gain (≥ 2 kHz) was significantly better with AMEIs than with HAs. Although the result had no statistical significance, AMEIs showed a superior word recognition score (WRS) compared to HAs. However, the most comfortable hearing level at which the WRS was tested was significantly decreased with an AMEI compared to an HA. In the K-HINT, patients with an AMEI showed greater recognition than those fitted with an HA under both quiet and noisy conditions. The APAHB scores revealed that patients were more satisfied with an AMEI rather than an HA on all subscales. The use of vibroplasty in patients with sloping high tone loss resulted in positive hearing outcomes when compared to conventional HAs. Based on the data from this study, AMEIs provided better objective and subjective results and could, therefore, be a better alternative for the treatment of sloping hearing loss.
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Affiliation(s)
- J M Lee
- Department of Otorhinolaryngology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - J H Jeon
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - I S Moon
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - J Y Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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Cornelissen L, Kim SE, Lee JM, Brown EN, Purdon PL, Berde CB. Electroencephalographic markers of brain development during sevoflurane anaesthesia in children up to 3 years old. Br J Anaesth 2018; 120:1274-1286. [PMID: 29793594 PMCID: PMC6617966 DOI: 10.1016/j.bja.2018.01.037] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 01/30/2018] [Accepted: 01/30/2018] [Indexed: 12/14/2022] Open
Abstract
Background General anaesthetics generate spatially defined brain oscillations in the EEG that relate fundamentally to neural-circuit architecture. Few studies detailing the neural-circuit activity of general anaesthesia in children have been described. The study aim was to identify age-related changes in EEG characteristics that mirror different stages of early human brain development during sevoflurane anaesthesia. Methods Multichannel EEG recordings were performed in 91 children aged 0–3 yr undergoing elective surgery. We mapped spatial power and coherence over the frontal, parietal, temporal, and occipital cortices during maintenance anaesthesia. Results During sevoflurane exposure: (i) slow–delta (0.1–4 Hz) oscillations were present in all ages, (ii) theta (4–8 Hz) and alpha (8–12 Hz) oscillations emerge by ∼4 months, (iii) alpha oscillations increased in power from 4 to 10 months, (iv) frontal alpha-oscillation predominance emerged at ∼6 months, (v) frontal slow oscillations were coherent from birth until 6 months, and (vi) frontal alpha oscillations became coherent ∼10 months and persisted in older ages. Conclusions Key developmental milestones in the maturation of the thalamo-cortical circuitry likely generate changes in EEG patterns in infants undergoing sevoflurane general anaesthesia. Characterisation of anaesthesia-induced EEG oscillations in children demonstrates the importance of developing age-dependent strategies to monitor properly the brain states of children receiving general anaesthesia. These data have the potential to guide future studies investigating neurodevelopmental pathologies involving altered excitatory–inhibitory balance, such as epilepsy or Rett syndrome.
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Affiliation(s)
- L Cornelissen
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA.
| | - S E Kim
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - J M Lee
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - E N Brown
- Department of Anaesthesia, Harvard Medical School, Boston, MA, USA; Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - P L Purdon
- Department of Anaesthesia, Harvard Medical School, Boston, MA, USA; Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - C B Berde
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA
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Agarwala S, Lee JM, Ng WL, Layani M, Yeong WY, Magdassi S. A novel 3D bioprinted flexible and biocompatible hydrogel bioelectronic platform. Biosens Bioelectron 2018; 102:365-371. [DOI: 10.1016/j.bios.2017.11.039] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 10/30/2017] [Accepted: 11/10/2017] [Indexed: 12/18/2022]
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Cessna JT, Fitzgerald R, Zimmerman BE, Laureano-Pérez L, Bergeron DE, van Wyngaardt F, Smith M, Jackson T, Howe B, da Silva CJ, Iwahara A, da Cruz PAL, Zhang M, Liu H, Liang J, Fréchou C, Bobin C, Cassette P, Kossert K, Nähle O, Marganiec-Gałązka J, Joseph L, Ravindra A, Kulkarni DN, Yunoki A, Sato Y, Lee KB, Lee JM, Agung, Dziel T, Listkowska A, Tymiński Z, Sahagia M, Antohe A, Ioan MR, Luca A, Krivosek M, Ometakova J, Javornik A, Zalesakova M, García-Toraño Martinez E, Roteta M, Mejuto M, Nedjadi Y, Juget F, Yuan MC, Yeh CY, Yeltepe E, Dirican A, Keightley J, Pearce A. Results of an international comparison of activity measurements of 68Ge. Appl Radiat Isot 2018; 134:385-390. [PMID: 29248210 PMCID: PMC10996930 DOI: 10.1016/j.apradiso.2017.10.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 10/30/2017] [Accepted: 10/30/2017] [Indexed: 11/25/2022]
Abstract
An international key comparison, identifier CCRI(II)-K2.Ge-68, has been performed. The National Institute of Standards and Technology (NIST) served as the pilot laboratory, distributing aliquots of a 68Ge/68Ga solution. Results for the activity concentration, CA, of 68Ge at a reference date of 12h00 UTC 14 November 2014 were submitted by 17 laboratories, encompassing many variants of coincidence methods and liquid-scintillation counting methods. The first use of 4π(Cherenkov)β-γ coincidence and anticoincidence methods in an international comparison is reported. One participant reported results by secondary methods only. Two results, both utilizing pure liquid-scintillation methods, were identified as outliers. Evaluation using the Power-Moderated Mean method results in a proposed Comparison Reference Value (CRV) of 621.7(11)kBqg-1, based on 14 results. The degrees of equivalence and their associated uncertainties are evaluated for each participant. Several participants submitted 3.6mL ampoules to the BIPM to link the comparison to the International Reference System (SIR) which may lead to the evaluation of a Key Comparison Reference Value and associated degrees of equivalence.
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Affiliation(s)
- J T Cessna
- Physical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA.
| | - R Fitzgerald
- Physical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - B E Zimmerman
- Physical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - L Laureano-Pérez
- Physical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - D E Bergeron
- Physical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - F van Wyngaardt
- Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia
| | - M Smith
- Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia
| | - T Jackson
- Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia
| | - B Howe
- Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia
| | - C J da Silva
- Laboratório Nacional de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria, Rio de Janeiro, Brazil
| | - A Iwahara
- Laboratório Nacional de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria, Rio de Janeiro, Brazil
| | - P A L da Cruz
- Laboratório Nacional de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria, Rio de Janeiro, Brazil
| | - M Zhang
- National Institute of Metrology, Beijing, China
| | - H Liu
- National Institute of Metrology, Beijing, China
| | - J Liang
- National Institute of Metrology, Beijing, China
| | - C Fréchou
- Laboratoire national de métrologie et d'essais - Laboratoire national Henri Becquerel, Gif-sur-Yvette cedex, France
| | - C Bobin
- Laboratoire national de métrologie et d'essais - Laboratoire national Henri Becquerel, Gif-sur-Yvette cedex, France
| | - P Cassette
- Laboratoire national de métrologie et d'essais - Laboratoire national Henri Becquerel, Gif-sur-Yvette cedex, France
| | - K Kossert
- Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
| | - O Nähle
- Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
| | | | - L Joseph
- Bhabha Atomic Research Centre, Mumbai, India
| | - A Ravindra
- Bhabha Atomic Research Centre, Mumbai, India
| | | | - A Yunoki
- National Metrology Institute of Japan, AIST, Tsukuba, Japan
| | - Y Sato
- National Metrology Institute of Japan, AIST, Tsukuba, Japan
| | - K B Lee
- Korea Research Institute of Standards and Science, Daejeon, Republic of Korea
| | - J M Lee
- Korea Research Institute of Standards and Science, Daejeon, Republic of Korea
| | - Agung
- Korea Research Institute of Standards and Science, Daejeon, Republic of Korea
| | - T Dziel
- National Centre for Nuclear Research Radioisotope Centre POLATOM, Otwock, Poland
| | - A Listkowska
- National Centre for Nuclear Research Radioisotope Centre POLATOM, Otwock, Poland
| | - Z Tymiński
- National Centre for Nuclear Research Radioisotope Centre POLATOM, Otwock, Poland
| | - M Sahagia
- National Institute of Research and Development for Physics and Nuclear Engineering "Horia Hulubei", Bucarest - Magurele, Romania
| | - A Antohe
- National Institute of Research and Development for Physics and Nuclear Engineering "Horia Hulubei", Bucarest - Magurele, Romania
| | - M-R Ioan
- National Institute of Research and Development for Physics and Nuclear Engineering "Horia Hulubei", Bucarest - Magurele, Romania
| | - A Luca
- National Institute of Research and Development for Physics and Nuclear Engineering "Horia Hulubei", Bucarest - Magurele, Romania
| | - M Krivosek
- Slovenský Metrologický Ústav, Bratislava, Slovakia
| | - J Ometakova
- Slovenský Metrologický Ústav, Bratislava, Slovakia
| | - A Javornik
- Slovenský Metrologický Ústav, Bratislava, Slovakia
| | - M Zalesakova
- Slovenský Metrologický Ústav, Bratislava, Slovakia
| | | | - M Roteta
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Madrid, Spain
| | - M Mejuto
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Madrid, Spain
| | - Y Nedjadi
- Institut Universitaire de Radiophysique Appliquée, Lausanne, Switzerland
| | - F Juget
- Institut Universitaire de Radiophysique Appliquée, Lausanne, Switzerland
| | - M-C Yuan
- Institute of Nuclear Energy Research, Taoyuan County, Taiwan
| | - C Y Yeh
- Institute of Nuclear Energy Research, Taoyuan County, Taiwan
| | - E Yeltepe
- Turkish Atomic Energy Authority, Lodumlu - Ankara, Turkey
| | - A Dirican
- Turkish Atomic Energy Authority, Lodumlu - Ankara, Turkey
| | - J Keightley
- National Physical Laboratory, Teddington, United Kingdom
| | - A Pearce
- National Physical Laboratory, Teddington, United Kingdom
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Lee SH, Oh JS, Lee KB, Lee JM, Hwang SH, Lee MK, Kwon EH, Kim CS, Choi IH, Yeo IY, Yoon JY, Im JM. Evaluation of abundance of artificial radionuclides in food products in South Korea and sources. J Environ Radioact 2018; 184-185:46-52. [PMID: 29334620 DOI: 10.1016/j.jenvrad.2018.01.008] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/04/2018] [Accepted: 01/08/2018] [Indexed: 06/07/2023]
Abstract
Food samples are collected nationwide from January 2016 to February 2017 and their contents of artificial radionuclides are measured to address the growing concerns regarding the radioactive contamination of food products in Korea. Specifically, 900 food samples are collected for this study and their contents of representative artificial radionuclides 134Cs, 137Cs, 239,240Pu, and 90Sr are analyzed. The analysis shows that the activity concentrations of 137Cs in fish range from minimum detectable activity (MDA) to 340 mBq/kg of fresh weight. The concentration factor (CF) determined for 137Cs as a measure of its bioavailability is calculated to be ca. 74 and found to be very similar to that (100) recommended by the International Atomic Energy Agency. With an MDA of <0.221 mBq/kg, the results reveal that 239,240Pu values in fish are below the MDA. The activity concentrations of 137Cs and 90Sr are lower than the MDA in both shellfish and seaweed, while the activity concentrations of 239,240Pu in shellfish range from 0.26 to 2.18 mBq/kg, and for seaweed samples range from 2.07 to 3.38 mBq/kg. The atom ratios of 240Pu/239Pu in shellfish caught at the Korean coast vary from 0.209 to 0.237, with a mean of 0.227. The higher 240Pu/239Pu atom ratio determined in shellfish is thought to be caused by the plutonium transported from the Pacific Proving Grounds rather than other sources such as the Fukushima nuclear power plant accident. The activity concentrations of 137Cs in mushrooms are found to vary from 1.0 to 21.4 Bq/kg, with the highest concentrations observed in the Oak (shiitake) and Sarcodon asparatus. 134Cs is detected in three mushroom specimens collected from Jeju Island and about 3-3.6% of 137Cs present in the wild mushrooms native to the Jeju Island are introduced as a result of the Fukushima nuclear plant accident. The annual effective doses of 137Cs received through consumption of mushrooms and fish are 2.0 × 10-4 mSv yr-1 and 3.9 × 10-5 mSv yr-1, and those values are negligible compared to the annual effective doses limit of 1 mSv yr-1.
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Affiliation(s)
- S H Lee
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea.
| | - J S Oh
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - K B Lee
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - J M Lee
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - S H Hwang
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - M K Lee
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - E H Kwon
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - C S Kim
- Korea Institute of Nuclear Safety, Daejeon, 34142, Republic of Korea
| | - I H Choi
- Korea Institute of Nuclear Safety, Daejeon, 34142, Republic of Korea
| | - I Y Yeo
- Korea Institute of Nuclear Safety, Daejeon, 34142, Republic of Korea
| | - J Y Yoon
- Korea Institute of Nuclear Safety, Daejeon, 34142, Republic of Korea
| | - J M Im
- Korea Atomic Energy Research Institute, Daejeon, 34057, Republic of Korea
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Lee SS, Lee CM, Kim TH, Kim JJ, Lee JM, Kim HJ, Ha CY, Kim HJ, Jung WT, Lee OJ, Kim DY. Frequency and risk factors of drug-induced liver injury during treatment of multidrug-resistant tuberculosis. Int J Tuberc Lung Dis 2018; 20:800-5. [PMID: 27155184 DOI: 10.5588/ijtld.15.0668] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES To investigate the risk factors for drug-induced liver injury (DILI) during the treatment of multidrug-resistant tuberculosis (MDR-TB) and to compare the frequency of DILI in patients with and those without chronic liver disease (CLD). SETTING This was a retrospective observational cohort study including 299 consecutive patients who started MDR-TB treatment from January 2009 to December 2013. DESIGN Of the 299 patients, 35 had alcoholic liver disease (ALD group), 16 had hepatitis B virus infection (HBV group) and 11 had hepatitis C virus infection (HCV group). The remaining 237 patients without CLD were selected as the control group. RESULTS DILI occurred in 29 (9.7%) patients. The frequency of DILI was significantly higher in the ALD (17.1%, P = 0.038), HBV (31.3%, P = 0.005) and HCV groups (27.3%, P = 0.037) than in the control group (6.3%). Among all patients taken together, having HBV and HCV infection were independent risk factors for the occurrence of DILI during MDR-TB treatment. CONCLUSION DILI during MDR-TB treatment occurred more frequently in patients with CLD due to ALD, HBV and HCV infection than in those without CLD.
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Affiliation(s)
- S S Lee
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - C M Lee
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - T H Kim
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - J J Kim
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - J M Lee
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - H J Kim
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - C Y Ha
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - H J Kim
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - W T Jung
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - O J Lee
- Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - D Y Kim
- Department of Thoracic Surgery, Mokpo National Hospital, Mokpo, Republic of Korea
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Lee J, Seo SW, Yang JJ, Jang YK, Lee JS, Kim YJ, Chin J, Lee JM, Kim ST, Lee KH, Lee JH, Kim JS, Kim S, Yoo H, Lee AY, Na DL, Kim HJ. Longitudinal cortical thinning and cognitive decline in patients with early- versus late-stage subcortical vascular mild cognitive impairment. Eur J Neurol 2017; 25:326-333. [PMID: 29082576 DOI: 10.1111/ene.13500] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 07/06/2017] [Accepted: 10/20/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND PURPOSE Biomarker changes in cognitively impaired patients with small vessel disease are largely unknown. The rate of amyloid/lacune progression, cortical thinning and cognitive decline were evaluated in subcortical vascular mild cognitive impairment (svMCI) patients. METHODS Seventy-two svMCI patients were divided into early stage (ES-svMCI, n = 39) and late stage (LS-svMCI, n = 33) according to their Clinical Dementia Rating Sum of Boxes score. Patients were annually followed up with neuropsychological tests and brain magnetic resonance imaging for 3 years, and underwent a second [11 C] Pittsburgh compound B (PiB) positron emission tomography scan within a mean interval of 32.4 months. RESULTS There was no difference in the rate of increase in PiB uptake or lacune number between the ES-svMCI and LS-svMCI. However, LS-svMCI showed more rapid cortical thinning and cognitive decline than did the ES-svMCI. CONCLUSIONS We suggest that, whilst the rate of change in pathological burden did not differ between ES-svMCI and LS-svMCI, cortical thinning and cognitive decline progressed more rapidly in the LS-svMCI.
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Affiliation(s)
- J Lee
- Department of Neurology, Chungnam National University Hospital, Daejeon, Korea.,Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea
| | - S W Seo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea.,Department of Health Sciences and Technology, Sungkyunkwan University, Seoul, Korea.,Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Korea
| | - J-J Yang
- Department of Biomedical Engineering, Hanyang University, Seoul, Korea
| | - Y K Jang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea
| | - J S Lee
- Department of Medicine, Graduate School, Kyung Hee University, Seoul, Korea
| | - Y J Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea.,Department of Neurology, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Gangwon-do, Korea
| | - J Chin
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea
| | - J M Lee
- Department of Biomedical Engineering, Hanyang University, Seoul, Korea
| | - S T Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K-H Lee
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J H Lee
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - J S Kim
- Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S Kim
- Biostatistics Team, Samsung Biomedical Research Institute, Seoul, Korea
| | - H Yoo
- Biostatistics Team, Samsung Biomedical Research Institute, Seoul, Korea
| | - A Y Lee
- Department of Neurology, Chungnam National University Hospital, Daejeon, Korea
| | - D L Na
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea.,Department of Health Sciences and Technology, Sungkyunkwan University, Seoul, Korea
| | - H J Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Neuroscience Center, Samsung Medical Center, Seoul, Korea
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Oh TK, Jeon JH, Lee JM, Kim MS, Kim JH, Lim H, Kim SE, Eom W. Association of high-dose postoperative opioids with recurrence risk in esophageal squamous cell carcinoma: reinterpreting ERAS protocols for long-term oncologic surgery outcomes. Dis Esophagus 2017; 30:1-8. [PMID: 28859395 DOI: 10.1093/dote/dox074] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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] [Received: 09/07/2016] [Accepted: 05/23/2017] [Indexed: 12/11/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is associated with a poor prognosis and high postoperative recurrence rate. Although postoperative opioid use has been associated with cancer recurrence, its relevance in ESCC has not been determined. Therefore, this study investigated whether high-dose postoperative opioid use was associated with recurrence risk in patients with ESCC. For this retrospective analysis, the medical records of patients who were diagnosed with ESCC and who underwent surgery between January 2006 and December 2010 in the National Cancer Center, Korea were evaluated. Total opioid administration over a 10-day period, from during surgery to postoperative day 9, was calculated. A cutoff value was determined using receiver operating characteristic curve analysis, and patients were classified into the high-use and low-use groups. The primary and secondary outcomes of the study were freedom from recurrence and overall survival, respectively. After propensity score matching, the effect of opioid use on freedom from recurrence and overall survival was evaluated using the Kaplan-Meier method. The final analysis set included 258 patients. The cumulative opioid dose cutoff point was 1783.5 mg of oral morphine. High-dose postoperative opioid use was a significant factor affecting recurrence (Hazard ratio [HR], 2.162; 95% confidence interval [CI], 1.583-2.954; P < 0.0001). In contrast, postoperative opioid use was not associated with death (HR, 1.274; 95% CI, 0.922-1.761; P = 0.1422). In patients with ESCC, compared with low-dose opioid use, high-dose intraoperative and postoperative opioid use was significantly associated with an increased risk of recurrence. However, opioid dosage did not affect overall survival.
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Affiliation(s)
- T K Oh
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - J H Jeon
- Thoracic Surgery, National Cancer Center, Goyang
| | - J M Lee
- Thoracic Surgery, National Cancer Center, Goyang
| | - M S Kim
- Thoracic Surgery, National Cancer Center, Goyang
| | - J H Kim
- Departments of Anesthesiology and Pain Medicine
| | - H Lim
- Departments of Anesthesiology and Pain Medicine
| | - S-E Kim
- Department of Biostatistics, Korea University College of Medicine, Seoul, Republic of Korea
| | - W Eom
- Departments of Anesthesiology and Pain Medicine
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50
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Goo DE, Yang SB, Kim YJ, Lee JM, Lee WH, Song D, Park SI. Arterial Embolism Occurring During Percutaneous Thrombectomy of Dialysis Graft. Cardiovasc Intervent Radiol 2017; 40:1866-1872. [PMID: 28779218 DOI: 10.1007/s00270-017-1754-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/18/2017] [Indexed: 11/30/2022]
Abstract
PURPOSE To evaluate the incidence, management methods and follow-up results of arterial embolism during percutaneous thrombectomy of hemodialysis grafts. MATERIALS AND METHODS After Institutional Review Board approval, the radiologic database of our department for percutaneous thrombectomy procedure in hemodialysis access was retrospectively reviewed. Between 1998 and June 2014, 2975 percutaneous thrombectomy procedures using thromboaspiration technique were performed in 1524 patients with thrombosed hemodialysis grafts. After thrombectomy, angioplasty was performed for significant stenoses. The incidence of arterial embolism was analyzed according to the location/shape of the arteriovenous graft. Percutaneous management methods of arterial embolism and long-term follow-up results by fistulography were also evaluated. RESULTS Arterial embolism was documented by angiography in 117 cases (3.9%). Of these, three were symptomatic and subsided after embolectomy. The incidence was significantly correlated with the location/shape of the graft (p = 0.001). Arterial emboli were retrieved using occlusion balloon/Fogarty balloon (n = 58), guiding catheter-assisted aspiration (n = 36), sheath-assisted aspiration (n = 2) and back-bleeding technique (n = 3). Others were observed without intervention (n = 17) or surgically removed (n = 1). Arterial emboli were completely retrieved in 86 cases and partially retrieved in 13 cases. Ulnar artery rupture occurred in one case due to over-inflation of the occlusion balloon. Follow-up fistulography performed in 60 patients among whom 99 percutaneous embolectomies were done revealed arterial stenosis/occlusion in 7 and residual emboli in one patient. In observed patients without intervention, follow-up documented complete resolution of the emboli without arterial stenosis in 9 patients. CONCLUSION Radiologically perceivable arterial embolism is uncommon during percutaneous thrombectomy of thrombosed dialysis grafts. The majority of the emboli can be retrieved by percutaneous techniques, but may induce arterial damage in some patients. Clinical observation can be another option for patients without ischemic symptoms.
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Affiliation(s)
- D E Goo
- Department of Radiology, College of Medicine, Soonchunhyang University, 59 Daesagwan-gil, Hannam-dong, Yongsan-gu, Seoul, 140-743, South Korea
| | - S B Yang
- Department of Radiology, College of Medicine, Soonchunhyang University, 59 Daesagwan-gil, Hannam-dong, Yongsan-gu, Seoul, 140-743, South Korea.
| | - Y J Kim
- Department of Radiology, College of Medicine, Soonchunhyang University, 59 Daesagwan-gil, Hannam-dong, Yongsan-gu, Seoul, 140-743, South Korea
| | - J M Lee
- Department of Radiology, College of Medicine, Soonchunhyang University, 59 Daesagwan-gil, Hannam-dong, Yongsan-gu, Seoul, 140-743, South Korea
| | - W H Lee
- Department of Radiology, College of Medicine, Soonchunhyang University, 59 Daesagwan-gil, Hannam-dong, Yongsan-gu, Seoul, 140-743, South Korea
| | - D Song
- Department of General Surgery, College of Medicine, Soonchunhyang University, Seoul, South Korea
| | - S I Park
- Department of Radiology, Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
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