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Choi SM, Choi H, Lee DH, Hong MH. Comparative finite element analysis of mandibular posterior single zirconia and titanium implants: a 3-dimensional finite element analysis. J Adv Prosthodont 2022; 13:396-407. [PMID: 35003555 PMCID: PMC8712109 DOI: 10.4047/jap.2021.13.6.396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/23/2021] [Accepted: 12/06/2021] [Indexed: 11/08/2022] Open
Abstract
PURPOSE Zirconia has exceptional biocompatibility and good mechanical properties in clinical situations. However, finite element analysis (FEA) studies on the biomechanical stability of two-piece zirconia implant systems are limited. Therefore, the aim of this study was to compare the biomechanical properties of the two-piece zirconia and titanium implants using FEA. MATERIALS AND METHODS Two groups of finite element (FE) models, the zirconia (Zircon) and titanium (Titan) models, were generated for the exam. Oblique (175 N) and vertical (175 N) loads were applied to the FE model generated for FEA simulation, and the stress levels and distributions were investigated. RESULTS In oblique loading, von Mises stress values were the highest in the abutment of the Zircon model. The von Mises stress values of the Titan model for the abutment screw and implant fixture were slightly higher than those of the Zircon model. Minimum principal stress in the cortical bone was higher in the Titan model than Zircon model under oblique and vertical loading. Under both vertical and oblique loads, stress concentrations in the implant components and bone occurred in the same area. Because the material itself has high stiffness and elastic modulus, the Zircon model exhibited a higher von Mises stress value in the abutments than the Titan model, but at a level lower than the fracture strength of the material. CONCLUSION Owing to the good esthetics and stress controllability of the Zircon model, it can be considered for clinical use.
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Affiliation(s)
- Sung-Min Choi
- Department of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
| | - Hyunsuk Choi
- Department of Dentistry and Prosthodontics, Daegu Catholic University School of Medicine, Daegu, Republic of Korea
| | - Du-Hyeong Lee
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Min-Ho Hong
- Department of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea
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Choi YJ, Chung EH, Lee E, Kim CH, Lee YJ, Kim HB, Kim BS, Kim HY, Cho Y, Seo JH, Sol IS, Sung M, Song DJ, Ahn YM, Oh HL, Yu J, Jung S, Lee KS, Lee JS, Jang GC, Jang YY, Chung HL, Choi SM, Han MY, Shim JY, Kim JT, Kim CK, Yang HJ, Suh DI. Clinical Characteristics of Macrolide-Refractory Mycoplasma pneumoniae Pneumonia in Korean Children: A Multicenter Retrospective Study. J Clin Med 2022; 11:jcm11020306. [PMID: 35054002 PMCID: PMC8779611 DOI: 10.3390/jcm11020306] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [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: 11/23/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 02/04/2023] Open
Abstract
Mycoplasma pneumoniae is a major causative pathogen of community-acquired pneumonia in children, and the treatment of choice is macrolides. There is an increasing trend in reports of refractory clinical responses despite macrolide treatment due to the emergence of macrolide-resistant M. pneumoniae. Early discrimination of macrolide-refractory M. pneumoniae pneumonia (MrMP) from macrolide-sensitive M. pneumoniae pneumonia (MSMP) is vital; however, testing for macrolide susceptibility at the time of admission is not feasible. This study aimed to identify the characteristics of MrMP in Korean children, in comparison with those of MSMP. In this multicenter study, board-certified pediatric pulmonologists at 22 tertiary hospitals reviewed the medical records from 2010 to 2015 of 5294 children who were hospitalized with M. pneumoniae pneumonia and administered macrolides as the initial treatment. One-way analysis of variance and the Kruskal-Wallis test were used to compare differences between groups. Of 5294 patients (mean age, 5.6 years) included in this analysis, 240 (4.5%), 925 (17.5%), and 4129 (78.0%) had MrMP, macrolide-less effective M. pneumoniae pneumonia, and MSMP, respectively. Compared with the MSMP group, the MrMP group had a longer fever duration, overall (13.0 days) and after macrolide use (8.0 days). A higher proportion of MrMP patients had respiratory distress, pleural effusion, and lobar pneumonia. The mean aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, and C-reactive protein levels were the highest in the MrMP group, along with higher incidences of extrapulmonary manifestations and atelectasis (during and post infection). Pre-existing conditions were present in 17.4% (n = 725/4159) of patients, with asthma being the most common (n = 334/4811, 6.9%). This study verified that MrMP patients show more severe initial radiographic findings and clinical courses than MSMP patients. MrMP should be promptly managed by agents other than macrolides.
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Affiliation(s)
- Yun Jung Choi
- Hospital Medicine Center, Seoul National University Hospital, Seoul KS013, Korea;
- Department of Pediatrics, Seoul National University Hospital, Seoul KS013, Korea
| | - Eun Hee Chung
- Department of Pediatrics, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon KS015, Korea;
| | - Eun Lee
- Department of Pediatrics, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju KS018, Korea;
| | - Chul-Hong Kim
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon KS011, Korea; (C.-H.K.); (J.S.L.)
| | - Yong Ju Lee
- Department of Pediatrics, Yongin Severance Hospital, Yongin KS009, Korea;
| | - Hyo-Bin Kim
- Asthma and Allergy Center, Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul KS013, Korea; (H.-B.K.); (C.-K.K.)
| | - Bong-Seong Kim
- Department of Pediatrics, Ulsan University Gangneung Asan Hospital, Gangneung KS007, Korea;
| | - Hyung Young Kim
- Department of Pediatrics, Pusan National University Children’s Hospital, Yangsan KS011, Korea; (H.Y.K.); (S.J.)
| | - Yoojung Cho
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul KS013, Korea;
| | - Ju-Hee Seo
- Department of Pediatrics, Dankook University Hospital, Dankook University Medical School, Cheonan KS002, Korea;
| | - In Suk Sol
- Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul KS013, Korea; (I.S.S.); (J.Y.S.)
| | - Myongsoon Sung
- Department of Pediatrics, Soonchunhyang University Gumi Hospital, Gumi KS010, Korea;
| | - Dae Jin Song
- Department of Pediatrics, Korea University Guro Hospital, Korea University College of Medicine, Seoul KS013, Korea;
| | - Young Min Ahn
- Department of Pediatrics, Eulji General Hospital, Eulju University, Seoul KS013, Korea;
| | - Hea Lin Oh
- Department of Pediatrics, Korea Cancer Center Hospital, Seoul KS013, Korea;
| | - Jinho Yu
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul KS013, Korea;
| | - Sungsu Jung
- Department of Pediatrics, Pusan National University Children’s Hospital, Yangsan KS011, Korea; (H.Y.K.); (S.J.)
| | - Kyung Suk Lee
- Department of Pediatrics, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri KS013, Korea;
| | - Ju Suk Lee
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon KS011, Korea; (C.-H.K.); (J.S.L.)
| | - Gwang Cheon Jang
- Department of Pediatrics, National Health Insurance Service, Ilsan Hospital, Goyang KS007, Korea;
| | - Yoon-Young Jang
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu KS002, Korea; (Y.-Y.J.); (H.L.C.)
| | - Hai Lee Chung
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu KS002, Korea; (Y.-Y.J.); (H.L.C.)
| | - Sung-Min Choi
- Department of Pediatrics, Dongguk University Gyeongju Hospital, Gyeongju KS010, Korea;
| | - Man Yong Han
- Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam KS009, Korea;
| | - Jung Yeon Shim
- Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul KS013, Korea; (I.S.S.); (J.Y.S.)
| | - Jin Tack Kim
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul KS013, Korea;
| | - Chang-Keun Kim
- Asthma and Allergy Center, Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul KS013, Korea; (H.-B.K.); (C.-K.K.)
| | - Hyeon-Jong Yang
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul KS013, Korea;
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul KS013, Korea
- Correspondence: (H.-J.Y.); (D.I.S.); Tel.: +82-02-709-9114 (H.-J.Y.); +82-2-2072-7559 (D.I.S.)
| | - Dong In Suh
- Department of Pediatrics, Seoul National University Hospital, Seoul KS013, Korea
- Correspondence: (H.-J.Y.); (D.I.S.); Tel.: +82-02-709-9114 (H.-J.Y.); +82-2-2072-7559 (D.I.S.)
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Park YK, Park YN, Moon JE, Kim HB, Shin M, Lee E, Kim CH, Lee JS, Lee YJ, Kim BS, Kim HY, Jung S, Kim Y, Kim S, Park C, Seo JH, Shim JY, Sol IS, Sung M, Song DJ, Ahn YM, Oh HL, Yu J, Lee KS, Jang GC, Jang YY, Chung HL, Chung EH, Choi SM, Choi YJ, Han MY, Kim JT, Kim CK, Yang HJ. The incidence and risk factors of extrapulmonary manifestations in Mycoplasma pneumoniae pneumonia. Allergy Asthma Respir Dis 2022. [DOI: 10.4168/aard.2022.10.4.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yoo Kyung Park
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - You Na Park
- Department of Pediatrics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Ji Eun Moon
- Department of Biostatistics, Clinical Trial Center, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Hyo-Bin Kim
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Meeyong Shin
- Department of Pediatrics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Eun Lee
- Department of Pediatrics, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea
| | - Chul-Hong Kim
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Ju Suk Lee
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Yong Ju Lee
- Department of Pediatrics, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea
| | - Bong-Seong Kim
- Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea
| | - Hyung Young Kim
- Department of Pediatrics, Pusan National University Children’s Hospital, Yangsan, Korea
| | - Sungsu Jung
- Department of Pediatrics, Pusan National University Children’s Hospital, Yangsan, Korea
| | - Yunsun Kim
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Sangyoung Kim
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Chorong Park
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Ju-Hee Seo
- Departmentof Pediatrics, Dankook University Hospital, Dankook University Medical School, Cheonan, Korea
| | - Jung Yeon Shim
- Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - In Suk Sol
- Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Myongsoon Sung
- Department of Pediatrics, Soonchunhyang University Gumi Hospital, Soonchunhyang University College of Medicine, Gumi, Korea
| | - Dae Jin Song
- Department of Pediatrics, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Young Min Ahn
- Department of Pediatrics, Eulji General Hospital, Eulji University, Seoul, Korea
| | - Hea Lin Oh
- Department of Pediatrics, Korea Cancer Center Hospital, Ilsan, Korea
| | - Jinho Yu
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyung Suk Lee
- Department of Pediatrics, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
| | - Gwang Cheon Jang
- Department of Pediatrics, National Health Insurance Service Ilsan Hospital, Ilsan, Korea
| | - Yoon-Young Jang
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Hai Lee Chung
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea
| | - Eun Hee Chung
- Department of Pediatrics, Chungnam National University School of Medicine, Daejeon, Korea
| | - Sung-Min Choi
- Department of Pediatrics, Dongguk University Gyeongju Hospital, Gyeongju, Korea
| | - Yun Jung Choi
- Departmentof Pediatrics, Seoul National University Children Hospital, Seoul, Korea
| | - Man Yong Han
- Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Jin Tack Kim
- Department of Pediatrics, The Catholic University of Korea Uijeongbu St. Mary's Hospital, Uijeongbu, Korea
| | - Chang-Keun Kim
- Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Hyeon-Jong Yang
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
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Balakrishnan T, Choi SM. Encapsulation of atomically thin gold nanosheets within porous silica for enhanced structural stability and superior catalytic performance. NEW J CHEM 2022. [DOI: 10.1039/d2nj03221j] [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: 11/21/2022]
Abstract
Porous silica-encapsulated atomically thin AuNSs exhibit excellent structural stability in dried state and superior catalytic activity and stability for the reduction of 4-nitrophenol.
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Affiliation(s)
- Thiruparasakthi Balakrishnan
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
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Kam DH, Jeong YH, Choi SM, Yun JI. Magnetic withdrawal of particles for multiple purposes in nuclear power plants. Nuclear Engineering and Technology 2021. [DOI: 10.1016/j.net.2021.06.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Choi SM, Ooi SZY, Carpenter EC. 1167 A Cross-Sectional Study of Undergraduate Exposure and Teaching of Trauma and Orthopaedics in The UK. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.896] [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: 11/14/2022]
Abstract
Abstract
Aim
Research has shown exposure to specialities as a medical student can have a great influence in choice of career. Exposure to potential mentors during this time also has an additive effect on career shaping of medical students. It is important to encourage interest in trauma and orthopaedics (T&O) to ensure the best candidates are selected. Our aim was to establish the compulsory duration of T&O teaching provided by all (non-new) medical schools. This study also aims to identify which other specialities were taught alongside T&O.
Method
Surveys were distributed to medical students in all 33 (non-new) medical schools, through surgical societies and colleagues met through courses, between June 2019- February 2020. The survey asked the total length of compulsory teaching of T&O in days, and how this was divided into pre-clinical or clinical teaching.
Results
Data for all 33 UK medical schools were collected. Only 7 medical schools taught T&O as a standalone subject. The other 26 medical schools combined T&O with other specialities, most commonly with Rheumatology (n = 16). The average total length of days of T&O teaching across medical school was 17 days (range 3-60). Majority of this teaching was given in the clinical years of medical school (n = 30).
Conclusions
Research has shown medical students require enough exposure to increase their interest in pursuing a particular speciality. Currently there is a huge variance on the number of compulsory teaching days for T&O.
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Affiliation(s)
- S M Choi
- University Hospital of Wales, Cardiff, United Kingdom
| | - S Z Y Ooi
- Cardiff University School of Medicine, Cardiff, United Kingdom
| | - E C Carpenter
- University Hospital of Wales, Cardiff, United Kingdom
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Choi SM, Kumar R, Morgan-Jones R, Agarwal S. 1064 Extra-Articular Tibial Deformity Management in Total Knee Replacement. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.1023] [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: 11/13/2022]
Abstract
Abstract
Aim
In knee replacements, restoration of mechanical alignment is essential. Patients with extra-articular deformities (EAD) pose challenges in planning knee replacements. We present a method, based on our experience and review of literature on planning knee replacement surgery, in the presence of extra-articular coronal plane deformity of the tibia.
Method
Retrospective analysis was made of six patients with EAD of the tibia who underwent knee replacement at our centre. Mechanical axis of the tibia is considered and positioning of the tibia component is planned perpendicular to the mechanical axis of the tibia. The integrity of the collaterals determines the need for correction. Tibial resection >15mm from medial or lateral aspect of the tibia is an indication for corrective osteotomy prior to replacement surgery. The hip knee ankle angle (HKA) was noted. Pre-operative, post-operative clinical score, degree of constraints and post-operative complications were recorded. A post-operative long leg alignment radiograph was obtained.
Result
All patients had total knee replacement without correction of deformity. Adequate alignment of the limb and restoration of mechanical axis was achieved in all six patients without the need for correction of tibial deformity. All patients had improvement in their HKA angle and Oxford knee score. No re-operations were required, and no complications recorded.
Conclusions
Our study will help provide guidance on operative planning and decisions making for patients with extra-articular coronal plane tibial deformities.
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Affiliation(s)
- S M Choi
- University Hospital of Wales, Cardiff, United Kingdom
| | - R Kumar
- University Hospital of Wales, Cardiff, United Kingdom
| | | | - S Agarwal
- University Hospital of Wales, Cardiff, United Kingdom
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Dey J, Lee SJ, Kim J, Lim SH, Ha JM, Lee MJ, Choi SM. Spontaneous Formation of Highly Stable Nanoparticle Supercrystals Driven by a Covalent Bonding Interaction. Nano Lett 2021; 21:258-264. [PMID: 33372784 DOI: 10.1021/acs.nanolett.0c03616] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nanoparticle supercrystals (NPSCs) are of great interest as materials with emergent properties. Different types of intermolecular forces, such as van der Waals interaction and hydrogen bonding, are present in the NPSCs fabricated to date. However, the limited structural stability of such NPSCs that results from the weakness of these intermolecular forces is a challenge. Here, we report a spontaneous formation of NPSCs driven by covalent bonding interactions, a type of intramolecular force much stronger than the above-mentioned intermolecular forces. A model solution-phase anhydride reaction is used to form covalent bonds between molecules grafted on the surface of gold nanoparticles, resulting in three-dimensional NPSCs. The NPSCs are very stable in different solvents, in dried conditions, and at temperatures as high as 160 °C. In addition to this, the large library of covalent-bond-forming reactions available and the low cost of reactants make the covalent bonding approach highly versatile and economical.
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Affiliation(s)
- Jahar Dey
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Sang-Jo Lee
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Jiwhan Kim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Sung-Hwan Lim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Jae-Min Ha
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Min-Jae Lee
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
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Ko SJ, Cho J, Choi SM, Park YS, Lee CH, Lee SM, Yoo CG, Kim YW, Lee J. Phase Angle and Frailty Are Important Prognostic Factors in Critically Ill Medical Patients: A Prospective Cohort Study. J Nutr Health Aging 2021; 25:218-223. [PMID: 33491037 PMCID: PMC7548529 DOI: 10.1007/s12603-020-1487-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 07/27/2020] [Indexed: 01/27/2023]
Abstract
OBJECTIVES To investigate whether phase angle (PhA) measured by bioelectrical impedance analysis (BIA) and frailty are associated with the outcomes of critical illnesses. DESIGN A single-center prospective cohort study. SETTING Medical intensive care unit (ICU) in Seoul National University Hospital, Seoul, Republic of Korea. PARTICIPANTS 97 patients who were admitted to the medical ICU. MEASUREMENTS On admission, PhA was measured by BIA, and frailty was assessed by the Korean Modified Barthel Index (KMBI) scoring system. Patients were classified according to PhA and KMBI scores, and their impact on the outcomes of critical illnesses was evaluated. RESULTS The patients' mean age was 62.4 ± 16.4 years, and 56 of the patients (57.7%) were men. Having a high PhA above 3.5 at the time of ICU admission was associated with lower in-hospital mortality (adjusted OR 0.42, p = .042), and a shorter duration of ICU stay (5.6 days vs. 9.8 days, p = .016) compared to those with a low PhA. Other indices measured by BIA were not significantly associated with outcomes of critical illnesses. Frailty (KMBI > 60) was associated with more mechanical ventilation days (2.3 days vs. 7.1 days; p = .018). CONCLUSION Both PhA and frailty are important prognostic factors predicting the outcomes of critical illnesses. Low PhA scores were associated with increased mortality and a longer duration of ICU stay, and frailty was associated with more mechanical ventilation days.
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Affiliation(s)
- S J Ko
- Jinwoo Lee, MD, Department of Internal Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Seoul, 03080, Republic of Korea; E-mail:
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Lee E, Kim CH, Lee YJ, Kim HB, Kim BS, Kim HY, Kim Y, Kim S, Park C, Seo JH, Sol IS, Sung M, Song MS, Song DJ, Ahn YM, Oh HL, Yu J, Jung S, Lee KS, Lee JS, Jang GC, Jang YY, Chung EH, Chung HL, Choi SM, Choi YJ, Han MY, Shim JY, Kim JT, Kim CK, Yang HJ. Annual and seasonal patterns in etiologies of pediatric community-acquired pneumonia due to respiratory viruses and Mycoplasma pneumoniae requiring hospitalization in South Korea. BMC Infect Dis 2020; 20:132. [PMID: 32050912 PMCID: PMC7017508 DOI: 10.1186/s12879-020-4810-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 01/21/2020] [Indexed: 11/24/2022] Open
Abstract
Background Community–acquired pneumonia (CAP) is one of the leading worldwide causes of childhood morbidity and mortality. Its disease burden varies by age and etiology and is time dependent. We aimed to investigate the annual and seasonal patterns in etiologies of pediatric CAP requiring hospitalization. Methods We conducted a retrospective study in 30,994 children (aged 0–18 years) with CAP between 2010 and 2015 at 23 nationwide hospitals in South Korea. Mycoplasma pneumoniae (MP) pneumonia was clinically classified as macrolide-sensitive MP, macrolide-less effective MP (MLEP), and macrolide-refractory MP (MRMP) based on fever duration after initiation of macrolide treatment, regardless of the results of in vitro macrolide sensitivity tests. Results MP and respiratory syncytial virus (RSV) were the two most commonly identified pathogens of CAP. With the two epidemics of MP pneumonia (2011 and 2015), the rates of clinical MLEP and MRMP pneumonia showed increasing trends of 36.4% of the total MP pneumonia. In children < 2 years of age, RSV (34.0%) was the most common cause of CAP, followed by MP (9.4%); however, MP was the most common cause of CAP in children aged 2–18 years of age (45.3%). Systemic corticosteroid was most commonly administered for MP pneumonia. The rate of hospitalization in intensive care units was the highest for RSV pneumonia, and ventilator care was most commonly needed in cases of adenovirus pneumonia. Conclusions The present study provides fundamental data to establish public health policies to decrease the disease burden due to CAP and improve pediatric health.
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Affiliation(s)
- Eun Lee
- Department of Pediatrics, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, South Korea
| | - Chul-Hong Kim
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Yong Ju Lee
- Department of Pediatrics, Hallym University Kangnam Sacred Heart Hospital, Seoul, South Korea
| | - Hyo-Bin Kim
- Asthma and Allergy Center, Department of Pediatrics, Inje University Sanggye Paik Hospital, 1342 Dongil-ro, Nowon-gu, Seoul, 01757, South Korea
| | - Bong-Seong Kim
- Department of Pediatrics, Ulsan University Gangneung Asan Hospital, Gangneung, South Korea
| | - Hyung Young Kim
- Department of Pediatrics, Pusan National University Children's Hospital, Yangsan, South Korea
| | - Yunsun Kim
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, South Korea
| | - Sangyoung Kim
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, South Korea
| | - Chorong Park
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, South Korea
| | - Ju-Hee Seo
- Department of Pediatrics, Dankook University Hospital, Dankook University Medical School, Cheonan, South Korea
| | - In Suk Sol
- Department of Pediatrics, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Myongsoon Sung
- Department of Pediatrics, Soonchunhyang University Gumi Hospital, Seoul, South Korea
| | - Min Seob Song
- Department of Pediatrics, Inje University Haeundae Paik Hospital, Pusan, South Korea
| | - Dae Jin Song
- Department of Pediatrics, Korea University Guro Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Young Min Ahn
- Department of Pediatrics, Eulji University, Eulji General Hospital, Seoul, South Korea
| | - Hea Lin Oh
- Department of Pediatrics, Korea Cancer Center Hospital, Seoul, South Korea
| | - Jinho Yu
- Department of Pediatrics, Asan Medical Center, Ulsan University Medical School, Seoul, South Korea
| | - Sungsu Jung
- Department of Pediatrics, Pusan National University Children's Hospital, Yangsan, South Korea
| | - Kyung Suk Lee
- Department of Pediatrics, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, South Korea
| | - Ju Suk Lee
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Gwang Cheon Jang
- Department of Pediatrics, National Health Insurance Service, Ilsan Hospital, Ilsan, South Korea
| | - Yoon-Young Jang
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, South Korea
| | - Eun Hee Chung
- Department of Pediatrics, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Hai Lee Chung
- Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, South Korea
| | - Sung-Min Choi
- Department of Pediatrics, Dongguk University Kyungju Hospital, Kyungju, South Korea
| | - Yun Jung Choi
- Department of Pediatrics, Seoul National University Children Hospital, Seoul, South Korea
| | - Man Yong Han
- Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, South Korea
| | - Jung Yeon Shim
- Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Jin Tack Kim
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Chang-Keun Kim
- Asthma and Allergy Center, Department of Pediatrics, Inje University Sanggye Paik Hospital, 1342 Dongil-ro, Nowon-gu, Seoul, 01757, South Korea.
| | - Hyeon-Jong Yang
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, South Korea. .,Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Daesagwan-ro, Yongsan-gu, Seoul, 04401, South Korea.
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11
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Ha JM, Lim SH, Dey J, Lee SJ, Lee MJ, Kang SH, Jin KS, Choi SM. Micelle-Assisted Formation of Nanoparticle Superlattices and Thermally Reversible Symmetry Transitions. Nano Lett 2019; 19:2313-2321. [PMID: 30673238 DOI: 10.1021/acs.nanolett.8b04817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanoparticle superlattices (NPSLs) are of great interest as materials with designed emerging properties depending on the lattice symmetry as well as composition. The symmetry transition of NPSLs depending on environmental conditions can be an excellent ground for making new stimuli-responsive functional materials. Here, we report a spherical micelle-assisted method to form exceptionally ordered NPSLs which are inherently sensitive to environmental conditions. Upon mixing functionalized gold nanoparticles (AuNPs) with a nonionic surfactant spherical micellar solution, NPSLs of different symmetries such as NaZn13, MgZn2, and AlB2-type are formed depending on the size ratio between micelles and functionalized AuNPs and composition. The NPSLs formed by the spherical micelle-assisted method show thermally reversible order-order (NaZn13-AlB2) and order-disorder (MgZn2-isotropic) symmetry transitions, which are consistent with the Gibbs free energy calculations for binary hard-sphere model. This approach may open up new possibilities for NPSLs as stimuli-responsive functional materials.
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Affiliation(s)
- Jae-Min Ha
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
| | - Sung-Hwan Lim
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
| | - Jahar Dey
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
| | - Sang-Jo Lee
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
| | - Min-Jae Lee
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
| | - Shin-Hyun Kang
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
| | - Kyeong Sik Jin
- Pohang Accelerator Laboratory , Pohang , Gyeongbuk 37673 , Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology Daejeon , 34141 , Republic of Korea
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12
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Lee YJ, Kim HB, Kim BS, Kim CK, Kim CH, Kim HY, Kim S, Kim Y, Park C, Seo JH, Sol IS, Sung M, Song MS, Song DJ, Ahn YM, Oh HL, Yu J, Lee KS, Lee E, Lee JS, Jang GC, Jang YY, Chung EH, Chung HL, Choi SM, Choi YJ, Han MY, Yang HJ, Shim JY, Kim JT. Seasonal patterns and etiologies of croup in children during the period 2010–2015: A multicenter retrospective study. Allergy Asthma Respir Dis 2019. [DOI: 10.4168/aard.2019.7.2.78] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Yong Ju Lee
- Department of Pediatrics, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea
| | - Hyo-Bin Kim
- Department of Pediatrics, Asthma and Allergy Center, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Bong-Seong Kim
- Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea
| | - Chang-Keun Kim
- Department of Pediatrics, Asthma and Allergy Center, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Cheol Hong Kim
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Hyung Young Kim
- Department of Pediatrics, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Sangyoung Kim
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Yunsun Kim
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Chorong Park
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Ju-Hee Seo
- Department of Pediatrics, Dankook University Hospital, Cheonan, Korea
| | - In Suk Sol
- Department of Pediatrics, Yonsei University Severance Hospital, Seoul, Korea
| | - Myongsoon Sung
- Department of Pediatrics, Soonchunhyang University Gumi Hospital, Gumi, Korea
| | - Min Seob Song
- Department of Pediatrics, Inje University Haeundae Paik Hospital, Busan, Korea
| | - Dae Jin Song
- Department of Pediatrics, Korea University Guro Hospital, Seoul, Korea
| | - Young Min Ahn
- Department of Pediatrics, Eulji University Eulji General Hospital, Seoul, Korea
| | - Hea Lin Oh
- Department of Pediatrics, Korea Cancer Center Hospital, Seoul, Korea
| | - Jinho Yu
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyung Suk Lee
- Department of Pediatrics, Hanyang University Guri Hospital, Guri, Korea
| | - Eun Lee
- Department of Pediatrics, Chonnam National University Hospital, Gwangju, Korea
| | - Ju Suk Lee
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Gwang Cheon Jang
- Department of Pediatrics, National Health Insurance Service, Ilsan Hospital, Ilsan, Korea
| | - Yoon Young Jang
- Department of Pediatrics, Daegu Catholic University Medical Center, Daegu, Korea
| | - Eun Hee Chung
- Department of Pediatrics, Chungnam National University Hospital, Daejeon, Korea
| | - Hai Lee Chung
- Department of Pediatrics, Daegu Catholic University Medical Center, Daegu, Korea
| | - Sung-Min Choi
- Department of Pediatrics, Dongguk University Gyungju Hospital, Gyungju, Korea
| | - Yun Jung Choi
- Department of Pediatrics, Sowha Children's Hospital, Seoul, Korea
- Department of Pediatrics, Seoul National University Children Hospital, Seoul, Korea
| | - Man Yong Han
- Department of Pediatrics, CHA University CHA Bundang Medical Center, Seongnam, Korea
| | - Hyeon-Jong Yang
- SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jung Yeon Shim
- Division of Pediatric Allergy & Pulmonology, Department of Pediatrics, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea
| | - Jin-Tack Kim
- Department of Pediatric Allergy & Pneumology, Catholic University Uijeongbu St. Mary's Hospital, Uijeongbu, Korea
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Abstract
The drying time of iron oleate as a single and reliable control parameter for the fine size control (with a sub-nanometer scale step) of monodisperse IONPs in the large-scale thermal decomposition method.
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Affiliation(s)
- Thiruparasakthi Balakrishnan
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
| | - Min-Jae Lee
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
| | - Jahar Dey
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
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Biswas P, Sen D, Ha JM, Choi SM. Anisotropic interaction driven surface modulation on spray-dried microgranules. J Colloid Interface Sci 2018; 538:149-158. [PMID: 30502536 DOI: 10.1016/j.jcis.2018.11.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/09/2018] [Accepted: 11/13/2018] [Indexed: 11/16/2022]
Abstract
Rapid evaporation of solvent from spray colloidal droplets induces directed self-assembly among the nanoparticles, eventually interlocking them into correlated granular structures. In this work, it is demonstrated that anisotropy in colloidal interparticle interaction plays a key role in governing the surface topology of spray-dried granules. Colloidal dispersion comprised of spherical nanosilica (NS) and cylindrical carbon nanotubes (CNT) was chosen as a model system in this regard. For identical polarities of the colloidal components, granules with prominent wrinkle-like modulations are obtained, which is in drastic contrast with the case of opposite polarities. The extent of surface modulation depends on the relative concentration of CNT with respective to NS. A plausible mechanism for the formation of surface modulation is elucidated on the basis of the evolving anisotropic interparticle interactions during assembly. Electron microscopy, small-angle scattering, Raman spectroscopic techniques have been used for quantitative characterization of these micro-granules.
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Affiliation(s)
- Priyanka Biswas
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India
| | - Debasis Sen
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - Jae-Min Ha
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305701, Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305701, Korea
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Choi SM, Kang CY, Lee BJ, Park JB. In Vitro-In Vivo Correlation Using In Silico Modeling of Physiological Properties, Metabolites, and Intestinal Metabolism. Curr Drug Metab 2018; 18:973-982. [PMID: 29086683 DOI: 10.2174/1389200218666171031124347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 04/13/2017] [Accepted: 06/16/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Recently, pharmaceutical research has focused on in vitro-in vivo correlation as a novel challenge, and in silico modeling has been an important component. As in silico models are highly representative of practical use, regulatory agencies such as the US Food and Drug Administration and European Medicines Agency have recognized and utilized in silico modeling as a useful tool; this allows pharmaceutical organizations to use Physiologically Based Pharmacokinetic (PBPK) models for decision-making, which may aid the financial efficiency of a clinical trial. However, some studies have shown differences of up to approximately 40% in pharmacokinetic parameters such as area under the curve or maximum serum concentration between observed and simulated data. METHODS Gastroplus™ was used to demonstrate current PBPK simulation. 46 research papers were compared with each other's applications of PBPK simulation. RESULTS To improve the accuracy of simulation, additional factors may need to be considered, such as precise volume of gastrointestinal sections, specific metabolism of the target drug, and physicochemical data of drug metabolites. Furthermore, the results of these simulations would be extremely valuable to the relevant applications. Simulation programs using Advanced Compartmental Absorption and Transit (ACAT)/PBPK modeling could be a powerful tool for companies performing pre-clinical experiments, and could provide a solution for the ethical issues and economic constraints of clinical trials. CONCLUSION If in silico modeling produced more precise results that could closely match clinical data, it could be more readily used to screen drug pharmacodynamics in bodily systems, and the efficiency of clinical trials would be improved. However, simulation programs are currently limited in their accuracy of pharmacodynamic predictions. In developing new drugs, pharmaceutical companies should address this issue in order to improve in silico/PBPK modeling in the future.
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Affiliation(s)
- Sung-Min Choi
- College of Pharmacy, Sahmyook University, Seoul 139-742. Korea
| | - Chin-Yang Kang
- College of Pharmacy, Sahmyook University, Seoul 139-742. Korea
| | - Beom-Jin Lee
- College of Pharmacy, Ajou University, Suwon 443-749. Korea
| | - Jun-Bom Park
- College of Pharmacy, Sahmyook University, Seoul 139-742. Korea
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Choi SM, Park JW. Multifunctional effects of a modification of SLA titanium implant surface with strontium-containing nanostructures on immunoinflammatory and osteogenic cell function. J Biomed Mater Res A 2018; 106:3009-3020. [PMID: 30192064 DOI: 10.1002/jbm.a.36490] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [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: 05/08/2018] [Revised: 06/10/2018] [Accepted: 06/18/2018] [Indexed: 01/07/2023]
Abstract
This study investigated the effects of surface modification of clinically available sandblasted/acid-etched (SLA) titanium oral implants with strontium (Sr)-containing nanostructures on both early immunoinflammatory macrophage cell functions and osteogenic stem cell functions. The goal was to provide insight for future surface engineering of titanium implants with multifunctional effects, that is, tissue healing capacity at both the nonosteogenic cell centered initial stage and the subsequent osteogenic cell-governed later stage-osseointegration process. The Sr-containing nanostructure was prepared in on the SLA-type implant surface by wet chemical treatment. The results showed that Sr modification is favorable for early macrophage cell functions and increases osteogenic capacity of the SLA surface. Surface Sr modification notably upregulated regenerative macrophage phenotype expression and anti-inflammatory cytokine IL10 production while suppressing inflammatory cytokine TNFα. Sr incorporation enhanced certain early cellular events of ST2 stem cells such as early cellular spreading and critical integrin gene expression, which in turn notably increased osteogenic differentiation (osteogenesis-related phenotype gene expression and osteocalcin production) when combined with the microstructured SLA implant surface. Surface modification of SLA-type implants with Sr-containing nanostructures demonstrated the ability to favorably influence early immunoinflammatory macrophage cell functions and the functionality of osteogenesis cells, resulting in an enhanced osseointegration outcome. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 3009-3020, 2018.
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Affiliation(s)
- Sung-Min Choi
- Department of Periodontology, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-Gu, Daegu, 41940, Republic of Korea
| | - Jin-Woo Park
- Department of Periodontology, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-Gu, Daegu, 41940, Republic of Korea
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17
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Lee MJ, Kang SH, Dey J, Choi SM. Porous Silica-Coated Gold Sponges with High Thermal and Catalytic Stability. ACS Appl Mater Interfaces 2018; 10:22562-22570. [PMID: 29806933 DOI: 10.1021/acsami.8b04811] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A method to fabricate porous silica-coated Au sponges that show high thermal and catalytic stability has been developed for the first time. The method involves dense surface functionalization of Au sponges (made by self-assembly of Au nanoparticles) with thiolated poly(ethylene glycol) (SH-PEG), which provides binding and condensation sites for silica precursors. The silica coating thickness can be controlled by using SH-PEG of different molecular weights. The silica-coated Au sponge prepared by using 5 kDa SH-PEG maintains its morphology at temperature as high as 700 °C. The calcination removes all organic molecules, resulting in porous silica-coated Au sponges, which contain hierarchically connected micro- and mesopores. The hierarchical pore structures provide an efficient pathway for reactant molecules to access the surface of Au sponges. The porous silica-coated Au sponges show an excellent catalytic recyclability, maintaining the catalytic conversion percentage of 4-nitrophenol by NaBH4 to 4-aminophenol as high as 93% even after 10 catalytic cycles. The method may be applicable for other porous metals, which are of great interests for catalyst, fuel cell, and sensor applications.
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Affiliation(s)
- Min-Jae Lee
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Shin-Hyun Kang
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Jahar Dey
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
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18
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Kim H, Kim J, Jeong HS, Kim H, Lee H, Ha JM, Choi SM, Kim TH, Nah YC, Shin TJ, Bang J, Satija SK, Koo J. Spontaneous hybrids of graphene and carbon nanotube arrays at the liquid-gas interface for Li-ion battery anodes. Chem Commun (Camb) 2018; 54:5229-5232. [PMID: 29726560 DOI: 10.1039/c8cc02148a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate that hybrid structures of graphene and single-walled carbon nanotubes (SWNTs) are precisely controlled at the liquid-gas interface. The functionalized SWNT Langmuir monolayers anchor single-layer graphene nanosheets (GNSs) suspended in water via Coulomb interaction at the interface. This GNS/SWNT hybrid multilayer electrode can be a promising anode material for Li-ion batteries, offering high specific capacity, outstanding power capability, and excellent cyclability.
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Affiliation(s)
- Hyeri Kim
- Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon, 34057, Korea
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Lee JG, Kim SY, Kim YT, Lee HJ, Park S, Choi SM, Kim DH, Cho WH, Yeo HJ, Park S, Choi SH, Hong SB, Shim TS, Jo KW, Jeon K, Jeong BH, Paik HC. First Report of the Korean Lung Transplantation Registry. Transplant Proc 2018; 50:2759-2763. [PMID: 30401392 DOI: 10.1016/j.transproceed.2018.02.185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/26/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The Korean Organ Transplantation Registry (KOTRY) began to register lung transplants in 2015. This is an initial report on the status of patients receiving lung transplants over the past 2 years. METHODS We analyzed a total of 69 patients who received lung transplants in 2015 and 2016 and who registered with the KOTRY. RESULTS The 69 patients were treated in 5 institutions. The average (SD) donor age was 39.2 (12.6) years; there were 40 male patients. The average (SD) recipient age was 55.7 (10.0) years, and the number of male recipients was 46. A total of 66 patients underwent bilateral lung transplantation, 3 underwent single-lung transplantation, and 1 underwent simultaneous heart-lung transplantation. The most frequent indication for lung transplantation was idiopathic pulmonary fibrosis (35 patients), followed by connective tissue disease-related interstitial lung disease (9) and acute respiratory failure (8). Prior to transplantation, 23 patients required ventilator care, and 12 required extracorporeal membrane oxygenation while on the waiting list. Episodes of acute rejection during follow-up were reported in 4, 2, 1, and 1 patients at 3, 6, 9, and 12 months, respectively. Infections requiring hospitalization were reported in 27, 10, 4, and 3 patients at 3, 6, 9, and 12 months, respectively. CONCLUSION The establishment of KOTRY renders it possible to collect nationwide data on lung transplantation, improving research on the topic and clarifying clinical feasibility.
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Affiliation(s)
- J G Lee
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - S Y Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Y T Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - H J Lee
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - S Park
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - S M Choi
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - D H Kim
- Department of Thoracic and Cardiovascular Surgery, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - W H Cho
- Department of Pulmonology and Critical Care Medicine, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - H J Yeo
- Department of Pulmonology and Critical Care Medicine, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - S Park
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S H Choi
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-B Hong
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - T S Shim
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K-W Jo
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - B-H Jeong
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H C Paik
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
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Cho BK, Kim YM, Choi SM, Park HW, SooHoo NF. Revision anatomical reconstruction of the lateral ligaments of the ankle augmented with suture tape for patients with a failed Broström procedure. Bone Joint J 2017; 99-B:1183-1189. [PMID: 28860398 DOI: 10.1302/0301-620x.99b9.bjj-2017-0144.r1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [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: 02/03/2017] [Accepted: 05/04/2017] [Indexed: 11/05/2022]
Abstract
AIMS The aim of this prospective study was to evaluate the intermediate-term outcomes after revision anatomical ankle ligament reconstruction augmented with suture tape for a failed modified Broström procedure. PATIENTS AND METHODS A total of 30 patients with persistent instability of the ankle after a Broström procedure underwent revision augmented with suture tape. Of these, 24 patients who were followed up for more than two years were included in the study. There were 13 men and 11 women. Their mean age was 31.8 years (23 to 44). The mean follow-up was 38.5 months (24 to 56) The clinical outcome was assessed using the Foot and Ankle Outcome Score (FAOS) and the Foot and Ankle Ability Measure (FAAM) score. The stability of the ankle was assessed using stress radiographs. RESULTS The mean FAOS and FAAM scores improved significantly to 87.5 (73 to 94) and 85.1 (70 to 95) points at final follow-up, respectively (p < 0.001). The mean angle of talar tilt and anterior talar translation improved significantly to 2.8° (0° to 6°) and 4.1 mm (2 to 7) at final follow-up, respectively (p < 0.001). Side to side comparison in stress radiographs at final follow-up showed no significant difference. The revision failed in one patient who underwent a further revision using allograft tendon. CONCLUSION The revision modified Broström procedure augmented with suture tape is an effective form of treatment for recurrent instability of the ankle following a failed Broström procedure. This technique provides reliable stability and satisfactory clinical outcomes at intermediate-term follow-up. Cite this article: Bone Joint J 2017;99-B:1183-9.
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Affiliation(s)
- B K Cho
- College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Y M Kim
- College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - S M Choi
- College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - H W Park
- School of Medicine, University of California, Los Angeles, California, USA
| | - N F SooHoo
- School of Medicine, University of California, Los Angeles, California, USA
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Lim SH, Lee T, Oh Y, Narayanan T, Sung BJ, Choi SM. Hierarchically self-assembled hexagonal honeycomb and kagome superlattices of binary 1D colloids. Nat Commun 2017; 8:360. [PMID: 28842555 PMCID: PMC5572454 DOI: 10.1038/s41467-017-00512-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 01/18/2017] [Accepted: 06/30/2017] [Indexed: 01/10/2023] Open
Abstract
Synthesis of binary nanoparticle superlattices has attracted attention for a broad spectrum of potential applications. However, this has remained challenging for one-dimensional nanoparticle systems. In this study, we investigate the packing behavior of one-dimensional nanoparticles of different diameters into a hexagonally packed cylindrical micellar system and demonstrate that binary one-dimensional nanoparticle superlattices of two different symmetries can be obtained by tuning particle diameter and mixing ratios. The hexagonal arrays of one-dimensional nanoparticles are embedded in the honeycomb lattices (for AB2 type) or kagome lattices (for AB3 type) of micellar cylinders. The maximization of free volume entropy is considered as the main driving force for the formation of superlattices, which is well supported by our theoretical free energy calculations. Our approach provides a route for fabricating binary one-dimensional nanoparticle superlattices and may be applicable for inorganic one-dimensional nanoparticle systems. Binary mixtures of 1D particles are rarely observed to cooperatively self-assemble into binary superlattices, as the particle types separate into phases. Here, the authors design a system that avoids phase separation, obtaining binary superlattices with different symmetries by simply tuning the particle diameter and mixture composition.
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Affiliation(s)
- Sung-Hwan Lim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Taehoon Lee
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Younghoon Oh
- Department of Chemistry and Research Institute for Basic Science, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107, Republic of Korea
| | - Theyencheri Narayanan
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38043, Grenoble, France
| | - Bong June Sung
- Department of Chemistry and Research Institute for Basic Science, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107, Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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Jeh SU, Yoon S, Seo DH, Lee SW, Lee C, Choi SM, Kam SC, Hwa JS, Chung KH, Hyun JS. Relationship between serum testosterone and nocturia in men without benign prostate enlargement. Andrology 2016; 5:58-62. [PMID: 27636882 DOI: 10.1111/andr.12270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/11/2016] [Accepted: 07/18/2016] [Indexed: 02/05/2023]
Abstract
Recent studies have focused on the relationship between nocturia and serum testosterone because testosterone is thought to be an important factor of prostate growth. However, it remains unclear whether altered serum concentrations of testosterone is associated with an increased risk of nocturia because patients who were taking diuretics or who had a large prostate, which may precipitate nocturia, were not excluded from most previous studies. We analyzed the clinical records of 596 non-benign prostatic enlargement (BPE) male patients to explore the relationship between serum total testosterone and nocturia. All patients were evaluated using a serum prostate-specific antigen (PSA) assay, measurement of serum total testosterone, transrectal ultrasonography, uroflowmetry, and a compilation of the International Prostate Symptom Score (IPSS) and International Index of Erectile Function (IIEF) questionnaires. Nocturia was defined as ≥2 nocturnal voiding episodes. The number of nocturia episodes was assessed using IPSS question 7. To evaluate the effect of serum testosterone on nocturia, multivariate regression analysis was performed including the covariates of age, IPSS, IIEF score, body mass index, PSA, prostate volume, and maximal urine flow rate. Based on multivariate linear analysis, serum testosterone level was not significantly associated with the severity of nocturia. However, with regard to the relationship between prevalence of nocturia and serum testosterone, prevalence of nocturia was significantly positively associated with age (OR = 1.048, p = 0.005), total IPSS (OR = 1.217, p < 0.001), and testosterone level (OR = 1.150, p = 0.041). Therefore, in men without an enlarged prostate, testosterone may play an opposing role in the etiology of nocturia.
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Affiliation(s)
- S U Jeh
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S Yoon
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - D H Seo
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - S W Lee
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - C Lee
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - S M Choi
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S C Kam
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - J S Hwa
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - K H Chung
- Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - J S Hyun
- Department of Urology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
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Lee MJ, Lim SH, Ha JM, Choi SM. Green Synthesis of High-Purity Mesoporous Gold Sponges Using Self-Assembly of Gold Nanoparticles Induced by Thiolated Poly(ethylene glycol). Langmuir 2016; 32:5937-5945. [PMID: 27221347 DOI: 10.1021/acs.langmuir.6b01197] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A facile and green synthesis method for mesoporous gold sponges has been developed, which involves a simple mixing of a very small amount of thiolated-poly(ethylene glycol) (SH-PEG) and citrate-covered gold nanoparticles (Au NPs) in aqueous solution at room temperature. While SH-PEG molecules have been widely used as biocompatible hydrophilic capping agents for Au NPs for stable dispersion in aqueous solution, here they are used as destabilizing agents. When SH-PEG molecules are mixed with citrate-covered Au NPs at the molar ratio ranging from 3 to 20 (SH-PEG/Au NP), mesoporous gold sponges with randomly interconnected 3D network structures are formed within 2 to 3 h. This is driven by the destabilization of negatively charged citrate molecules on Au NPs by a small number of SH-PEG molecules bonded on the particle surface, which results in the decrease in zeta potential and thus the assembly of Au NPs into porous sponges. The use of very low concentration of SH-PEG (ca. 20-200 nM) in aqueous solution at room temperature makes the method highly eco-friendly as well as results in high-purity as-synthesized gold sponges (98.7 wt %). The mesoporous gold sponges fabricated with the present method exhibit a high SERS activity, making them highly applicable for sensitive SERS detection of molecules.
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Affiliation(s)
- Min-Jae Lee
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology , Daejeon 305-701, Republic of Korea
| | - Sung-Hwan Lim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology , Daejeon 305-701, Republic of Korea
| | - Jae-Min Ha
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology , Daejeon 305-701, Republic of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology , Daejeon 305-701, Republic of Korea
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Ha JM, Jang HS, Lim SH, Choi SM. Selective distributions of functionalized single-walled carbon nanotubes in a polymeric reverse hexagonal phase. Soft Matter 2015; 11:5821-5827. [PMID: 26059259 DOI: 10.1039/c5sm00355e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have investigated the distributions of individually isolated and hydrophilically functionalized single-walled carbon nanotubes (p-SWNTs) in the Pluronic L121-water system at the reverse hexagonal phase using small-angle X-ray scattering (SAXS) and contrast-matched small-angle neutron scattering (SANS) measurements. As the p-SWNT-L121-water system is transitioned from the lamellar phase to the reverse hexagonal phase with temperature, p-SWNTs which were selectively distributed in the polar layers of the lamellar structure become selectively distributed in the cylindrical polar cores of the reverse hexagonal structure, forming a hexagonal array of p-SWNTs. This was clearly confirmed by the contrast-matched SANS measurements. The selective distribution of p-SWNTs in the reverse hexagonal phase is driven by the selective affinity of p-SWNTs to the polar domains of the block copolymer system. The method demonstrated in this study provides a new route for fabricating ordered SWNT superstructures and may be applicable for inorganic 1D nanoparticles such as semiconducting, metallic and magnetic nanorods which are of great interest.
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Affiliation(s)
- Jae-Min Ha
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea.
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Jeon JI, Ko SH, Kim YJ, Choi SM, Kang KK, Kim H, Yoon HJ, Kim JM. The flavone eupatilin inhibits eotaxin expression in an NF-κB-dependent and STAT6-independent manner. Scand J Immunol 2015; 81:166-76. [PMID: 25565108 DOI: 10.1111/sji.12263] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/19/2014] [Indexed: 12/31/2022]
Abstract
The CC chemokine eotaxin contributes to epithelium-induced inflammation in airway diseases such as asthma. Eupatilin (5,7-dihydroxy-3',4',6'-trimethoxyflavone), a bioactive component of Artemisia asiatica Nakai (Asteraceae), is reported to inhibit the adhesion of eosinophils to bronchial epithelial cells. However, little is known about the molecular mechanism of eupatilin-induced attenuation of bronchial epithelium-induced inflammation. In this study, we investigated the effect of eupatilin on expression of eotaxin-1 (CCL11), a potent chemoattractant for eosinophils. Eupatilin significantly inhibited eotaxin expression in bronchial epithelial cells stimulated with TNF-α, while NF-κB and IκBα kinase (IKK) activities declined concurrently. Eupatilin also inhibited mitogen-activated protein kinase (MAPK) activity; however, all of these anti-inflammatory activities were reversed by MAPK overexpression. In contrast, eupatilin did not affect the signal transducer and activator of transcription 6 (STAT6) signalling in bronchial epithelial cells stimulated with IL-4. Furthermore, eupatilin significantly attenuated TNF-α-induced eosinophil migration. These results suggest that the eupatilin inhibits the signalling of MAPK, IKK, NF-κB and eotaxin-1 in bronchial epithelial cells, leading to inhibition of eosinophil migration.
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Affiliation(s)
- J I Jeon
- Department of Microbiology and Department of Biomedical Science, Hanyang University College of Medicine and Hanyang University Graduate School of Biomedical Science and Engineering, Seoul, South Korea
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Sim JB, Mayavan S, Choi SM. Scalable thermal synthesis of a highly crumpled, highly exfoliated and N-doped graphene/Mn-oxide nanoparticle hybrid for high-performance supercapacitors. RSC Adv 2015. [DOI: 10.1039/c5ra04163e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic illustration for the synthesis of the highly crumpled, highly exfoliated, and N-doped graphene/Mn-oxide nanoparticle hybrid and its SEM image.
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Affiliation(s)
- Jun-Bo Sim
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
| | - Sundar Mayavan
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
- Division of Corrosion & Materials Protection
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon
- Republic of Korea
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27
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Lim SH, Jang HS, Ha JM, Kim TH, Kwasniewski P, Narayanan T, Jin KS, Choi SM. Innenrücktitelbild: Highly Ordered and Highly Aligned Two-Dimensional Binary Superlattice of a SWNT/Cylindrical-Micellar System (Angew. Chem. 46/2014). Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Lim SH, Jang HS, Ha JM, Kim TH, Kwasniewski P, Narayanan T, Jin KS, Choi SM. Highly Ordered and Highly Aligned Two-Dimensional Binary Superlattice of a SWNT/Cylindrical-Micellar System. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/anie.201408889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Lim SH, Jang HS, Ha JM, Kim TH, Kwasniewski P, Narayanan T, Jin KS, Choi SM. Highly ordered and highly aligned two-dimensional binary superlattice of a SWNT/cylindrical-micellar system. Angew Chem Int Ed Engl 2014; 53:12548-54. [PMID: 25244635 DOI: 10.1002/anie.201403458] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 08/06/2014] [Indexed: 11/12/2022]
Abstract
We report a highly ordered intercalated hexagonal binary superlattice of hydrophilically functionalized single-walled carbon nanotubes (p-SWNTs) and surfactant (C12 E5 ) cylindrical micelles. When p-SWNTs (with a diameter slightly larger than that of the C12 E5 cylinders) were added to the hexagonally packed C12 E5 cylindrical-micellar system, p-SWNTs positioned themselves in such a way that the free-volume entropies for both p-SWNTs and C12 E5 cylinders were maximized, thus resulting in the intercalated hexagonal binary superlattice. In this binary superlattice, a hexagonal array of p-SWNTs is embedded in a honeycomb lattice of C12 E5 cylinders. The intercalated hexagonal binary superlattice can be highly aligned in one direction by an oscillatory shear field and remains aligned after the shear is removed.
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Affiliation(s)
- Sung-Hwan Lim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 (Republic of Korea) http://neutron.kaist.ac.kr
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Lim SH, Jang HS, Ha JM, Kim TH, Kwasniewski P, Narayanan T, Jin KS, Choi SM. Highly Ordered and Highly Aligned Two-Dimensional Binary Superlattice of a SWNT/Cylindrical-Micellar System. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403458] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Oh B, Butow PN, Boyle F, Beale PJ, Costa D, Pavlakis N, Bell DR, Choi SM, Lee MS, Rosenthal DS, Clarke SJ. Effects of qigong on quality of life, fatigue, stress, neuropathy, and sexual function in women with metastatic breast cancer: A feasibility study. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e20712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | | | | | | | | | - Nick Pavlakis
- Department of Medical Oncology, Royal North Shore Hospital, The University of Sydney, Sydney, Australia
| | | | - SM Choi
- Korea Institute of Oriental Medicine, DaeJeon, South Korea
| | - MS Lee
- Korea Institute of Oriental Medicine, DaeJeon, South Korea
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Berghe TV, Demon D, Bogaert P, Vandendriessche B, Goethals A, Depuydt B, Vuylsteke M, Roelandt R, Van Wonterghem E, Vandenbroecke J, Choi SM, Meyer E, Krautwald S, Declercq W, Takahashi N, Cauwels A, Vandenabeele P. Simultaneous targeting of interleukin-1 and interleukin-18 is required for protection against inflammatory and septic shock. Crit Care 2014. [PMCID: PMC4273742 DOI: 10.1186/cc14023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kim HM, So BH, Jeong WJ, Choi SM, Park KN. The effectiveness of ultrasonography in verifying the placement of a nasogastric feeding tube in patients with low consciousness at an emergency center. Crit Ultrasound J 2014. [PMCID: PMC4101373 DOI: 10.1186/2036-7902-6-s1-a16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Lee SY, Hong MH, Park MC, Choi SM. Effect of the Mandibular Orthopedic Repositioning Appliance on Trunk and Upper Limb Muscle Activation during Maximum Isometric Contraction. J Phys Ther Sci 2013; 25:1387-9. [PMID: 24396194 PMCID: PMC3881461 DOI: 10.1589/jpts.25.1387] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 06/04/2013] [Indexed: 02/02/2023] Open
Abstract
[Purpose] The purpose of this study was to measure the muscle activities of the trunk muscles and upper limb muscles during maximum isometric contraction when temporomandibular joint alignment was achieved with a mandibular orthopedic repositioning appliance in order provide basic data on the effects of mandibular orthopedic repositioning appliance on the entire body. [Subjects] The present study was conducted with healthy Korean adults in their 20s (males=10, females=10). [Methods] An 8 channel surface electromyography system was used to measure the muscle activities of the upper limb muscles and neck muscles of the subjects during maximum isometric contraction with and without use of a mandibular orthopedic repositioning appliance. [Results] The maximum isometric contractions of the trunk and upper limb muscles when mandibular orthopedic repositioning appliance were used were compared with those when no mandibular orthopedic repositioning appliance was used. The results showed that the sternocleidomastoid muscle, cervical and lumbar erector spinae, upper trapezius, biceps, triceps, rectus abdominis and internal oblique and external oblique muscles all showed significant increases in maximum isometric contractions with a mandibular orthopedic repositioning appliance. [Conclusion] The use of a mandibular orthopedic repositioning appliance is considered to be a method for normal adults to improve the stability of the entire body with the improvement of the stability of the TMJ. The proximal improvement in stability improves of the proximal thereby improving not only muscle strength with increased muscle activation but also stability during exercises.
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Affiliation(s)
- Sang-Yeol Lee
- Department of Physical Therapy, Kyungsung University,
Republic of Korea
| | - Min-Ho Hong
- Major of Dental Laboratory Science Graduate School,
Department of Dental Technology, Catholic University of Pusan, Republic of Korea
| | - Min-Chull Park
- Department of Physical Therapy, Catholic University of
Pusan, Republic of Korea
| | - Sung-Min Choi
- Department of Dental Laboratory Science, Catholic
University of Pusan, Republic of Korea
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Do C, Jang HS, Choi SM. Hydration forces between surfaces of surfactant coated single-walled carbon nanotubes. J Chem Phys 2013; 138:114701. [DOI: 10.1063/1.4793763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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37
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Cho BH, Choi YUN, Nam TS, Choi SM, Lee SH, Park MS, Kim MK. Characteristics of primary exertional headache in Korean marine corps. J Headache Pain 2013. [PMCID: PMC3620286 DOI: 10.1186/1129-2377-14-s1-p39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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Oh SA, Park SH, Ham HJ, Seung HJ, Jang JI, Suh SW, Jo SJ, Choi SM, Jeong HS. Molecular Characterization of Norovirus and Rotavirus in Outbreak of Acute Gastroenteritis in Seoul. ACTA ACUST UNITED AC 2013. [DOI: 10.4167/jbv.2013.43.4.307] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Se-Ah Oh
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Sang-Hun Park
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Hee-Jin Ham
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Hyun-Jung Seung
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Jung-Im Jang
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Sang-Won Suh
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Suk-Ju Jo
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Sung-Min Choi
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul, Korea
| | - Hae-Sook Jeong
- Division of Vaccine, Center for Infectious Diseases, Korea National Institute of Health, Korea
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Cho BH, Choi YUN, Nam TS, Choi SM, Lee SH, Park MS, Kim MK. Characteristics of primary exertional headache in Korean marine corps. J Headache Pain 2013. [DOI: 10.1186/1129-2377-1-s1-p39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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40
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Ryu SH, Lee JH, Park SH, Song MO, Park SH, Jung HW, Park GY, Choi SM, Kim MS, Chae YZ, Park SG, Lee YK. Antimicrobial resistance profiles among Escherichia coli strains isolated from commercial and cooked foods. Int J Food Microbiol 2012; 159:263-6. [DOI: 10.1016/j.ijfoodmicro.2012.09.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 08/21/2012] [Accepted: 09/06/2012] [Indexed: 11/28/2022]
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41
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Seo YH, Han CH, Lee JM, Choi SM, Moon KD. Effects of Opuntia ficus indica Extracts on Inactivation of Escherichia coli O157:H7 and Listeria monocytogenes on Fresh-cut Apples. ACTA ACUST UNITED AC 2012. [DOI: 10.3746/jkfn.2012.41.7.1009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Mayavan S, Sim JB, Choi SM. Simultaneous reduction, exfoliation and functionalization of graphite oxide into a graphene-platinum nanoparticle hybrid for methanol oxidation. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15566d] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- Hyung-Sik Jang
- Department of Nuclear and Quantum
Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Changwoo Do
- Department of Nuclear and Quantum
Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Tae-Hwan Kim
- Department of Nuclear and Quantum
Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
- Neutron Science Division, Department
of Reactor Utilization and Development, Korea Atomic Energy Research Institute, Daejeon 305-353, Republic
of Korea
| | - Sung-Min Choi
- Department of Nuclear and Quantum
Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Ryu SH, Park SG, Choi SM, Hwang YO, Ham HJ, Kim SU, Lee YK, Kim MS, Park GY, Kim KS, Chae YZ. Antimicrobial resistance and resistance genes in Escherichia coli strains isolated from commercial fish and seafood. Int J Food Microbiol 2011; 152:14-8. [PMID: 22071288 DOI: 10.1016/j.ijfoodmicro.2011.10.003] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 10/01/2011] [Accepted: 10/04/2011] [Indexed: 11/19/2022]
Abstract
The purpose of this study was to investigate the antimicrobial resistance and to characterize the implicated genes in Escherichia coli isolated from commercial fish and seafood. Fish and seafood samples (n=2663) were collected from wholesale and retail markets in Seoul, Korea between 2005 and 2008. A total of 179 E. coli isolates (6.7%) from those samples were tested for resistance to a range of antimicrobial agents. High rates of resistance to the following drugs were observed: tetracycline (30.7%), streptomycin (12.8%), cephalothin (11.7%), ampicillin (6.7%) and ticarcillin (6.1%). No resistances to amikacin, amoxicillin/clavulanic acid and cefoxitin were observed. Seventy out of 179 isolates which were resistant to one or more drugs were investigated by PCR for the presence of 3 classes of antimicrobial resistance genes (tetracycline, aminoglycosides and beta-lactams), class 1, 2 and 3 integrons. Gene cassettes of classes 1 and 2 integrons were further characterized by amplicon sequencing. The tetracycline resistance genes tetB and tetD were found in 29 (41.4%) isolates and 14 (20%) isolates, respectively. The beta-lactam resistance gene, bla(TEM) was found in 15 (21.4%) isolates. The aminoglycoside resistance gene, aadA was found in 18 (25.7%) isolates. Class 1 integron was detected in 41.4% (n=29) of the isolates, while only 2.9% (n=2) of the isolates were positive for the presence of class 2 integron. Two different gene cassettes arrangements were identified in class 1 integron-positive isolates: dfrA12-aadA2 (1.8 kb, five isolates) and aadB-aadA2 (1.6 kb, four isolates). One isolate containing class 2 integron presented the dfrA1-sat-aadA1 gene cassette array. These data suggest that commercial fish and seafood may act as the reservoir for multi-resistant bacteria and facilitate the dissemination of the resistance genes.
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Affiliation(s)
- Seung-Hee Ryu
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Gwacheon 427-070, Republic of Korea.
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Ko SH, Yoo DY, Kim YJ, Choi SM, Kang KK, Kim H, Kim N, Kim JS, Kim JM. A mechanism for the action of the compound DA-6034 on NF-κB pathway activation in Helicobacter pylori-infected gastric epithelial cells. Scand J Immunol 2011; 74:253-263. [PMID: 21623862 DOI: 10.1111/j.1365-3083.2011.02577.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
DA-6034 is a synthetic derivative of eupatilin, a flavonoid with anti-inflammatory effects. The aim of this study was to investigate the effects of DA-6034 on the interactions between IκB kinase (IKK) and heat shock protein 90 (Hsp90), and activation of the nuclear factor-kappaB (NF-κB) signalling pathway in human gastric epithelial cells infected with Helicobacter pylori. MKN-45 gastric epithelial cell line was treated with DA-6034 and H. pylori. DA-6034 significantly inhibited NF-κB activation and upregulated the expressions of interleukin-8 (IL-8) and monocyte chemoattractant protein-1 in MKN-45 cells infected with H. pylori. However, DA-6034 did not influence activator protein-1 DNA binding activity in H. pylori-infected gastric epithelial cells. Pretreatment with DA-6034 attenuated the H. pylori-induced increase in IKK activity, and Hsp90 was associated with IKK-α and IKK-γ in MKN-45 cells. Treatment with DA-6034 dissociated the Hsp90 and IKK-γ complex in H. pylori-infected cells, leading to the inhibition of IL-8 expression. These results suggest that the eupatilin derivative 7-carboxymethyloxy-3',4',5-trimethoxy flavone has anti-inflammatory activity in gastric epithelial cells infected with H. pylori through the promotion of the dissociation of the IKK-γ-Hsp90 complex and suppression of NF-κB signalling.
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Affiliation(s)
- S H Ko
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - D Y Yoo
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Y-J Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S M Choi
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - K K Kang
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - N Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J S Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J M Kim
- Department of Microbiology, Hanyang University College of Medicine, Seoul, KoreaDepartment of Biotechnology, Joongbu University, Choongnam, KoreaResearch Laboratory, Dong-A Pharmaceutical Company, Kyunggi-do, KoreaDepartment of Food and Nutrition, Yonsei University, Seoul, KoreaDepartment of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Kim HS, Lee JH, Kim TH, Okabe S, Shibayama M, Choi SM. Phase Behavior of Hexa-peri-hexabenzocoronene Derivative in Organic Solvent. J Phys Chem B 2011; 115:7314-20. [DOI: 10.1021/jp200882n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyo-Sik Kim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea
| | - Ji-Hwan Lee
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea
| | - Tae-Hwan Kim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea
| | - Satoshi Okabe
- Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | - Mitsuhiro Shibayama
- Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | - Sung-Min Choi
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea
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Kim SU, Hwang YO, Park AS, Park YA, Ham HJ, Choi SM, Kim JH. Contents of Heavy Metals (Hg, Pb, Cd, Cu) and Risk Assessment in Commercial Cephalopods. ACTA ACUST UNITED AC 2011. [DOI: 10.3746/jkfn.2011.40.4.606] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Nam SW, Lim YS, Choi SM, Seo WS, Park K. Thermoelectric properties of nanocrystalline Ca(3-x)Cu(x)Co4O9 (0 < or = x < or = 0.32) for power generation. J Nanosci Nanotechnol 2011; 11:1734-1737. [PMID: 21456279 DOI: 10.1166/jnn.2011.3347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We successfully synthesized nano-sized Ca(3-x)Cu(x)Co4O9 (0 < or = x < or = 0.32) powders by solution combustion process. Plate-like grains and porous structure were observed in the sintered Ca(3-x)Cu(x)Co4O9 ceramics. The sintered Ca(3-x)Cu(x)Co4O9 showed a monoclinic symmetry. The electrical conductivity of the Ca(3-x)Cu(x)Co4O9 increased with increasing temperature, indicative of a semiconducting behavior. The added Cu led to a significant increase in the electrical conductivity. The Seebeck coefficient of the Cu-added Ca(3-x)Cu(x)Co4O9 was much higher than that of the Cu-free Ca3Co4O9. The highest power factor (9.99 x 10(-4) Wm(-1)K-2) was obtained for Ca2.76Cu0.24Co4O9 at 800 degrees C.
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Affiliation(s)
- S W Nam
- Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea
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Park SH, Choi SS, Oh SA, Kim CK, Cho SJ, Lee JH, Ryu SH, Pak SH, Jung SK, Lee JI, Park GY, Choi SM, Chae YZ, Kang BH, Cheon DS, Kim HS. Detection and characterization of enterovirus associated with herpangina and hand, foot, and mouth disease in Seoul, Korea. Clin Lab 2011; 57:959-967. [PMID: 22239028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Human enteroviruses (HEVs) are a major cause of herpangina, HFMD (hand, foot, and mouth disease), and other neurological diseases in Seoul, Korea. METHODS A total of 56 specimens from hospitalized patients collected from February to December 2009 (37 females and 19 males) in Seoul were tested for HEV from stool, throat swab, and vesicle swab samples taken from patients with herpangina or HFMD using cell culture and RT-PCR in 2009. By the 1D gene, encoding the VP1 capsid protein, seven different HEV genotypes were detected with Coxsackievirus A2, A4, A5, A9, A16 (CA), Coxsackievirus B1 (CB), and Enterovirus 71 (EV71). The most prevalent genotype was CA16 (6, 10.7%), followed by CA2 (4, 7.1%), CA5 (4, 7.1%), EV71 (2, 3.6%), CA4 (1, 1.8%), CA9 (1, 1.8%), and CB1 (1, 1.8%). The 1D gene sequences of two EV71 strains were closely related with one another (98.5% nucleotide similarity) and belonged to the C4 genotype. CONCLUSIONS It is important to continuously survey the genetic characteristics of EV71 and CA16 from patients, which will provide useful data that aids in our understanding of HFMD infections in Seoul, Korea and may contribute to future control.
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MESH Headings
- Capsid Proteins/genetics
- Child, Preschool
- Coxsackievirus Infections/epidemiology
- Coxsackievirus Infections/virology
- Disease Outbreaks
- Enterovirus/genetics
- Enterovirus/isolation & purification
- Enterovirus A, Human/genetics
- Enterovirus A, Human/isolation & purification
- Enterovirus B, Human/genetics
- Enterovirus B, Human/isolation & purification
- Enterovirus Infections/epidemiology
- Enterovirus Infections/virology
- Feces/virology
- Female
- Hand, Foot and Mouth Disease/epidemiology
- Hand, Foot and Mouth Disease/virology
- Herpangina/epidemiology
- Herpangina/virology
- Humans
- Infant
- Infant, Newborn
- Male
- Pharynx/virology
- Phylogeny
- RNA, Viral/genetics
- RNA, Viral/isolation & purification
- Republic of Korea/epidemiology
- Sequence Analysis, RNA
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Affiliation(s)
- S H Park
- Seoul Metropolitan Government Research Institute of Public Health and Environment, Virus Team, 202-3, Yangjae-Dong, Seocho-Gu, Seoul 137-734, Republic of Korea.
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Jeong EJ, Lee JH, Kim MS, Bae GR, Jung C, Lee K, Choi SM, Kim DK, Lee DS, Kim WD, Jee YM, Cheong HK, Lee SH. Molecular characterization of enteroviruses detected in Gyeong-Ju and Po-Hang provinces of Korea in 2003. Arch Virol 2010; 155:1707-12. [DOI: 10.1007/s00705-010-0755-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Accepted: 07/07/2010] [Indexed: 11/25/2022]
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