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Wan ATY, Xiong Q, Xiao X, Ao KFK, Jang SW, Wong BSH, Wang M, Cao Q, Fung CSH, Chew FT, Sun B, Ngai SM, Leung TF, Jeong KY, Liu X, Tsui SKW. Multi-omic analysis of Tyrophagus putrescentiae reveals insights into the allergen complexity of storage mites. Clin Exp Allergy 2024; 54:77-81. [PMID: 37984814 DOI: 10.1111/cea.14418] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/11/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023]
Affiliation(s)
- Angel Tsz-Yau Wan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Hong Kong Bioinformatics Centre, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Qing Xiong
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Hong Kong Bioinformatics Centre, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Xiaojun Xiao
- Shenzhen Key Laboratory of Allergy and Immunology, School of Medicine, Shenzhen University, Shenzhen, China
| | - Kelvin Fu-Kiu Ao
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Seok Woo Jang
- Institute of Allergy, Department of Internal Medicine, College of Medicine, Yonsei University, Seoul, Korea
| | - Brian Shing-Hei Wong
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Mingqiang Wang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Centre for Microbial Genomics and Proteomics, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Qin Cao
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Cathy Sin-Hang Fung
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Fook-Tim Chew
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Baoqing Sun
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Sai Ming Ngai
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Ting-Fan Leung
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Kyoung Yong Jeong
- Institute of Allergy, Department of Internal Medicine, College of Medicine, Yonsei University, Seoul, Korea
| | - Xiaoyu Liu
- Shenzhen Key Laboratory of Allergy and Immunology, School of Medicine, Shenzhen University, Shenzhen, China
| | - Stephen Kwok-Wing Tsui
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Hong Kong Bioinformatics Centre, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Centre for Microbial Genomics and Proteomics, The Chinese University of Hong Kong, Hong Kong, Hong Kong
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Chung JS, Jang SW, Jung PY, Kim MJ, Choi YU, Bae KS, Kim S. Indicative factors for surgical or angiographic intervention in hemodynamically stable patients with blunt abdominal trauma: A retrospective cohort study. J Visc Surg 2023; 160:12-18. [PMID: 35459632 DOI: 10.1016/j.jviscsurg.2022.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
INTRODUCTION The standard of care for intraperitoneal injury in hemodynamically stable patients after blunt abdominal trauma has been replaced by non-operative management (NOM). However, selective NOM, depending on the situation, seems necessary in determining the treatment plan. In this study, we attempted to identify risk factors for surgical or angiographic intervention (SAI) in hemodynamically stable blunt abdominal trauma patients. METHODS This retrospective study which included adult patients who were brought to a regional trauma center was conducted from March 2015 to October 2019. We evaluated the characteristics of blunt abdominal trauma patients and analyzed factors that were related to the requirement of SAI in these patients. Patients were divided into SAI and conservative management (CM) groups. RESULTS We reviewed 1,176 patients, and after exclusions, of whom 248 blunt abdominal trauma and free fluid observed on CT were identified. The mean pulse rate was higher in the SAI than in the CM (P=0.025). Laboratory findings showed that lactate and delta neutrophil index (DNI) levels were higher in the SAI than in the CM (P=0.002 and 0.026 respectively). Additionally, the mean free fluid size in the SAI (85.69mm) was significantly larger than that in the CM (68.12mm; P=0.001), and blush was more frequently observed in the SAI (P<0.001). In multivariate analysis, only blush was an independent prognostic factor for SAI (OR 11.7, 95% CI, 5.1-30.8, P<0.001). CONCLUSION In hemodynamically stable patients with blunt abdominal trauma, blush but also high lactate and DNI are associated with the requirement of interventional radiology and/or surgery.
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Affiliation(s)
- J S Chung
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - S W Jang
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - P Y Jung
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - M J Kim
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - Y U Choi
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - K S Bae
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - S Kim
- Department of Surgery, Trauma Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
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Kwon O, Myong JP, Lee Y, Choi YJ, Yi JE, Seo SM, Jang SW, Kim PJ, Lee JM. Sodium-glucose co-transporter-2 inhibitors after acute myocardial infarction in type 2 diabetes patients: a population-based investigation from South Korea. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Whether the early use of sodium-glucose co-transporter-2 (SGLT2) inhibitors has cardioprotective effects following acute myocardial infarction (AMI) is unknown.
Purpose
We aimed to evaluate the association between the early initiation of SGLT2 inhibitors and cardiac event rates in diabetes patients with AMI undergoing percutaneous coronary intervention (PCI).
Methods
Based on the National Health Insurance claims data in South Korea, patients aged 18 years or older who had undergone PCI for the diagnosis of AMI between 2014 and 2018 were analyzed. Patients treated with SGLT2 inhibitors or other glucose-lowering drugs were matched based on a propensity score. The primary endpoint was a composite of all-cause mortality and hospitalizations for heart failure (HF). Major adverse cardiac events (MACE; a composite of all-cause death, non-fatal MI, and ischemic stroke) were compared as the secondary endpoint.
Results
After 1:2 propensity score matching, a total of 26,814 patients were assigned to the SGLT2 inhibitors group (938 patients) and the no use of SGLT2 inhibitors group (1,876 patients), respectively. During a median follow-up of 2.1 years, compared to no use of SGLT2 inhibitors, the early use of SGLT2 inhibitors was associated with lower risks of both the primary endpoint (9.8% vs. 13.9%, adjusted hazard ratio [HR] = 0.68, 95% confidence interval [CI]: 0.54 to 0.87, p=0.002) and secondary endpoint (9.1% vs. 11.6%, adjusted HR = 0.77, 95% CI: 0.60 to 0.99, p=0.04) (Figure 1). All-cause mortality and hospitalizations for HF were significantly lower in the early use of SLGT2 inhibitors group (adjusted HR = 0.55; 95% CI: 0.37 to 0.80; p=0.002; and HR = 0.74; 95% CI: 0.56 to 0.98; p=0.03, respectively). The incidence of non-fatal MI and ischemic stroke were not statistically different (Figure 2).
Conclusions
The early use of SGLT2 inhibitors in diabetes patients treated with PCI for AMI was associated with a significantly lower risk of cardiovascular events including all-cause mortality, hospitalizations for HF, and MACE. Our results suggest that the use of SGLT2 inhibitors could expand to the acute phase of AMI survivors with diabetes to reduce mortality and the subsequent development of congestive HF and ischemic events.
Funding Acknowledgement
Type of funding sources: Private hospital(s). Main funding source(s): This work was partly supported by the Research Institute of Medical Science, The Catholic University of Korea, Eunpyeong St. Mary's Hospital, Seoul, Republic of Korea.
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Affiliation(s)
- O Kwon
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - J P Myong
- The Catholic University of Korea Seoul St. Mary's Hospital, Department of Occupational & Environmental Medicine , Seoul , Korea (Republic of)
| | - Y Lee
- The Catholic University of Korea Seoul St. Mary's Hospital, Department of Urology , Seoul , Korea (Republic of)
| | - Y J Choi
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - J E Yi
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S M Seo
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S W Jang
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - P J Kim
- Eunpyeoung St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - J M Lee
- Eunpyeoung St. Mary's Hospital, Division of Endocrinology, Department of Internal Medicine , Seoul , Korea (Republic of)
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Jang SW, Jeong KY, Yuk JE, Lee J, Park KH, Park JW. Allergen Homologues, Pathogenesis-Related 1, Polygalacturonase, and Pectin Methyl Esterase from a Japanese Hop. Protein Pept Lett 2021; 28:362-371. [PMID: 32798367 DOI: 10.2174/0929866527666200813201924] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/21/2020] [Accepted: 06/10/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Japanese hop is an important cause of weed pollinosis in East Asia. Its pollen is abundant in autumn. This pollen is known to be the cause of many allergic diseases. However, molecular characteristics of its allergens have not been elucidated. OBJECTIVE In this study, we produced recombinant proteins of allergen homologues from Japanese hop by the analysis of expressed sequence tags (EST), and evaluated its allergenicity. METHODS cDNA library was constructed using as little as 50 ng of total RNA from Japanese hop pollen. Allergen homologues were identified by the initial screening of 963 EST clones. Recombinant proteins were overexpressed in the E. coli expression system and purified using Ni-nitrilotriacetic acid-agarose. Purified proteins were analyzed by ELISA. RESULTS AND DISCUSSION Japanese hop pathogenesis-related 1 protein (PR-1) shares 37.0 to 44.4% of amino acid sequence identity with Art v 2, Cuc m 3, and Cyn d 24. Pectin methyl esterase (PME) shows 23.2 to 50.2% of identities to Act d 7, Ole e 11, and Sal k 1. Polygalacturonase (PGs) shows 16.7 to 19.3% of identities to Phl p 13, Cry j 2, Cha o 2, Jun a 2, Pla a 2, and Pla or 2. IgE antibodies from Japanese hop allergy patients' sera recognized PR-1 (3.4%), PME (13.8%), PGs (3.7%), and profilin (13.8%), respectively. CONCLUSION Novel allergenic components were identified, even though low IgE reactivity was displayed reflecting the low degree of cross-reactivity with other pollen allergens. We believe that these molecules have worth further studies.
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Affiliation(s)
- Seok Woo Jang
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Kyoung Yong Jeong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Ji Eun Yuk
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jongsun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jung-Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul 03722, Korea
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Kim JT, Kim H, Kim SH, Kim DJ, Shin Y, Kim JD, Song H, Jang SW, Lee DC, Park KH, Lee JH, Jeong KY, Park JW. Comparison of Allergenic Properties among Commercially Available House Dust Mite Allergen Extracts in Korea. Yonsei Med J 2021; 62:86-90. [PMID: 33381938 PMCID: PMC7820445 DOI: 10.3349/ymj.2021.62.1.86] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/16/2020] [Accepted: 10/06/2020] [Indexed: 12/04/2022] Open
Abstract
Precise allergy diagnosis and effective allergen specific immunotherapy are largely dependent on the quality of allergen extract. A new extract of Dermatophagoides farinae was commercially developed by Prolagen. The allergenic properties of the new extract were compared with those of other commercial products. The allergenic properties of the new extract were compared according to protein concentration, protein profiles, major allergen (Der f 1) contents, and allergenic potency to those for three commercially available extracts imported in Korea (Jubilant HollisterStier Allergy, Lofarma S.p.A., and Stallergenes Greer). Protein concentrations varied up to 2.62-fold (0.404 to 1.057 mg/mL), and Der f 1 contents varied up to 11.3-fold (3.597 to 40.688 μg/mL). Protein profiles of the extracts showed no major discrepancies, although there were some differences in SDS-PAGE band intensities, reflecting protein concentrations. Allergen potency ranged from 37038 to 60491 PAU/mL. The Prolagen product was highest in terms of protein concentration and allergen potency. The Lofarma product displayed Der f 1 content similar to that in Prolagen (19.4 μg/mg vs. 19.3 μg/mg). Endotoxin levels varied 8.9-fold (1020 to 8985 EU/mL). The newly developed house dust mite extract showed equal or better allergenic properties than available commercial extracts. This new product may be useful for better diagnostics and allergen-specific immunotherapeutics.
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Affiliation(s)
- Ji Tae Kim
- Prolagen, Seoul, Korea
- Department of Biomedical Technology, Kangwon National University, Chuncheon, Korea
| | | | | | | | | | | | - Hangyeol Song
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Seok Woo Jang
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 PLUS Project for Medicine Science, Yonsei University, Seoul, Korea
| | - Deug Chan Lee
- Department of Biomedical Technology, Kangwon National University, Chuncheon, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyoung Yong Jeong
- Prolagen, Seoul, Korea
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
| | - Jung Won Park
- Prolagen, Seoul, Korea
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
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Hussain I, Lee JM, Iqbal S, Kim HS, Jang SW, Jung JY, An HJ, Lamiel C, Mohamed SG, Lee YR, Shim JJ. Preserved crystal phase and morphology: Electrochemical influence of copper and iron co-doped cobalt oxide and its supercapacitor applications. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135953] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jeong KY, Yuk JE, Lee J, Jang SW, Park KH, Lee JH, Park JW. Stability of extracts from pollens of allergenic importance in Korea. Korean J Intern Med 2020; 35:222-230. [PMID: 31534112 PMCID: PMC6960046 DOI: 10.3904/kjim.2018.211] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/28/2018] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND/AIMS Accurate diagnosis and the effects of allergen-specific immunotherapy for pollinosis are greatly dependent on the potency and stability of the extract. This study aimed to examine factors, such as temperature and storage buffer composition, that affect the stability of allergen extracts from pollens of allergenic importance in Korea. METHODS We prepared four pollen allergen extracts from ragweed, mugwort, Japanese hop, and sawtooth oak, which are the most important causes of seasonal rhinitis in Korea. Changes of protein and major allergen concentration were measured over 1 year by Bradford assay, two-site enzyme-linked immunosorbent assay, and sodium dodecyl sulfate-polyacrylamide gel electrophoresis after reconstitution of the lyophilized allergen extract in various buffers and stored at room temperature (RT, 18°C to 26°C) or refrigerated (4°C). RESULTS More than 90% of the original protein concentration in all four extracts examined was detected over 1 year when 50% glycerol was added and refrigerated, whereas 57.9% to 94.5% remained in the extracts at RT. The addition of 50% glycerol to the storage buffer was found to prevent protein degradation at RT. Amb a 1, a major allergen of ragweed, was almost completely degraded in 9 weeks at RT when reconstituted in a buffer without 50% glycerol. However, 55.6% to 92.8% of Amb a 1 content was detected after 1 year of incubation at 4°C in all buffer conditions except 0.3% phenol. CONCLUSION Addition of 50% glycerol as well as refrigeration was found to be important in increasing the shelf-life of allergen extracts from pollens of allergenic importance.
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Affiliation(s)
- Kyoung Yong Jeong
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Ji Eun Yuk
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jongsun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Seok Woo Jang
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Kyung Hee Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hyun Lee
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - Jung-Won Park
- Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
- Correspondence to: Jung-Won Park, M.D. Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodamun-gu, Seoul 03722, Korea Tel: +82-2-2228-1961 Fax: +82-2-362-8647 E-mail:
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Choi Y, Kim SH, Kim SH, Kim JY, Kim YR, Kim TS, Hwang YM, Kim JH, Jang SW, Rho TH, Lee MY, Oh YS. P1902Terminating the induced atrial tachyarrhythmia after complete pulmonary vein isolation during catheter ablation for persistent atrial fibrillation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Choi
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - S H Kim
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - S H Kim
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - J Y Kim
- Uijeongbu St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Uijeongbu, Korea Republic of
| | - Y R Kim
- St.Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Incheon, Korea Republic of
| | - T S Kim
- Daejeon St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Daejeon, Korea Republic of
| | - Y M Hwang
- St. Vincent's Hospital, Division of Cardiology, Department of Internal Medicine, Suwon, Korea Republic of
| | - J H Kim
- St. Vincent's Hospital, Division of Cardiology, Department of Internal Medicine, Suwon, Korea Republic of
| | - S W Jang
- St.Paul's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - T H Rho
- St.Paul's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - M Y Lee
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - Y S Oh
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
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Kim YR, Jang SW, Hwang YM, Kim JY, Kim TS, Kim SH, Kim JH, Oh YS, Lee MY, Rho TH. P397Long-term clinical outcomes of misdosing NOACs in patients with atrial fibrillation. Europace 2018. [DOI: 10.1093/europace/euy015.208] [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: 11/13/2022] Open
Affiliation(s)
- Y R Kim
- The Catholic University of Korea Incheon St. Mary's Hospital, Internal Medicine, Incheon, Korea Republic of
| | - S W Jang
- The Catholic University of Korea, Seoul, Korea Republic of
| | - Y M Hwang
- The Catholic University of Korea, Seoul, Korea Republic of
| | - J Y Kim
- The Catholic University of Korea, Seoul, Korea Republic of
| | - T S Kim
- The Catholic University of Korea, Seoul, Korea Republic of
| | - S H Kim
- The Catholic University of Korea, Seoul, Korea Republic of
| | - J H Kim
- The Catholic University of Korea, Seoul, Korea Republic of
| | - Y S Oh
- The Catholic University of Korea, Seoul, Korea Republic of
| | - M Y Lee
- The Catholic University of Korea, Seoul, Korea Republic of
| | - T H Rho
- The Catholic University of Korea, Seoul, Korea Republic of
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Koh IJ, Kim JH, Jang SW, Kim MS, Kim C, In Y. Are the Oxford(®) medial unicompartmental knee arthroplasty new instruments reducing the bearing dislocation risk while improving components relationships? A case control study. Orthop Traumatol Surg Res 2016; 102:183-7. [PMID: 26830001 DOI: 10.1016/j.otsr.2015.11.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 08/13/2015] [Revised: 10/28/2015] [Accepted: 11/23/2015] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The recently introduced Microplasty(®) system is an upgrade of conventional phase III instrumentation. However, little is known of its impact on the position of the implant following the Oxford(®) mobile-bearing unicompartmental knee arthroplasty (UKA). This study investigated whether the Microplasty(®) instrumentation system can improve the positioning of the implant and reduce the rate of early failure. HYPOTHESIS Microplasty(®) provides a better positioning and decreases the rate of dislocation. MATERIALS AND METHODS The medical records and radiographs of 82 consecutive Oxford(®) UKAs were reviewed retrospectively. The radiographic parameters and prevalence of early failure of 41 UKAs performed with the Microplasty(®) system and 41 UKAs using the conventional instrumentation system were compared. Both groups were comparable in terms of demographics and preoperative status. RESULTS The femoral components in the Microplasty(®) group were more contiguously placed and more convergent in relation to the tibial components compared to the conventional instrumentation system (P<0.01). The frequency of bearing dislocation was lower in the Microplasty(®) group (P=0.04). A wide gap and the angle between components were associated with an increased risk of bearing dislocation. CONCLUSION The Microplasty(®) instrumentation system consistently placed the femoral and tibial components in more contiguous and convergent positions. Such changes in position decreased the risk of bearing dislocations by reducing the space available for bearing rotation. LEVEL OF EVIDENCE Level III, case control study.
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Affiliation(s)
- I J Koh
- Department of Orthopaedics, Seoul St. Mary's Hospital, 137-701 Seoul, Korea; Department of Orthopaedics, The Catholic University of Korea College of Medicine, 137-701 Seoul, Korea
| | - J H Kim
- Department of Orthopaedics, Gangseo Himchan Hospital, 157-930 Seoul, Korea
| | - S W Jang
- Department of Orthopaedics, Seoul St. Mary's Hospital, 137-701 Seoul, Korea
| | - M S Kim
- Department of Orthopaedics, Seoul St. Mary's Hospital, 137-701 Seoul, Korea
| | - C Kim
- Department of Orthopaedics, Seoul St. Mary's Hospital, 137-701 Seoul, Korea
| | - Y In
- Department of Orthopaedics, Seoul St. Mary's Hospital, 137-701 Seoul, Korea; Department of Orthopaedics, The Catholic University of Korea College of Medicine, 137-701 Seoul, Korea.
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Seo GT, Jang SW, Lee SH, Yoon CH. The fouling characterization and control in the high concentration PAC membrane bioreactor HCPAC-MBR. Water Sci Technol 2005; 51:77-84. [PMID: 16003964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
This study focuses on the experimental investigation to identify the effect of PAC at high concentrations on the fouling of membranes. A pilot-scale experimental apparatus was installed at a water treatment plant located downstream of Nakdong river basin, Korea. Effluent of rapid sand filter was used as influent of the system, which consists of PAC bio-reactor, submerged membrane module (hollow fiber with pore size 0.1 m) and air supply facility. PAC was dosed at 40 g/L initially and it was not replaced during the operation period. Suction type filtration was carried out at intervals of 12 min. suction and 3 min. idling. At the initial flux 0.36 m/d, the system could be operated stably for around 90 days at target trans-membrane pressure (TMP) of 40 kPa. Among total resistance of membrane filtration, cake and gel layer resistance, Rc+Rg, was the dominant fraction (more than 90% of the total) to increase the filtration pressure, which means that the filtration resistance could be controlled by the PAC cake layer and then irreversible membrane fouling could be prevented. Three minutes air backwashing every 3 days could extend the operation period to 127 days. Organics were analyzed in terms of molecular weight structure. The influent of the system consists of 15.0% and 74.4% of hydrophobic and hydrophilic natural organic matter (NOM), respectively. Hydrophobic and hydrophilic (electrostatic) interaction was the main factor on fouling of the membrane in the reactor. Hydrophobic fraction decreased slightly in the effluent, which means hydrophobic NOM removal in the reactor by adsorption. Organics accumulated in the membrane were extracted for analysis after a certain period of operation. The fraction of hydrophobic and hydrophilic organics was 41.4% and 38.9%, respectively. On the basis of the experimental results, the hydrophobic organics were the major materials causing the fouling of the membrane, which should be changed to other types of material.
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Affiliation(s)
- G T Seo
- Department Environmental Engineering, Changwon National University, Sarim-dong 9, Changwon, Gyeongnam 641-773, South Korea.
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Kim YC, Kim EJ, Lee ED, Kim JH, Jang SW, Kim YG, Kwon JW, Kim WB, Lee MG. Comparative bioavailability of silibinin in healthy male volunteers. Int J Clin Pharmacol Ther 2004; 41:593-6. [PMID: 14692709 DOI: 10.5414/cpp41593] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIM To study a comparative bioavailability of Liverman capsule to Legaion capsule and Silymarin tablet (which contain silibinin) in 24 healthy volunteers. VOLUNTEERS AND METHODS Twenty-four healthy male Korean volunteers received each medicine at the silibinin dose of 120 mg in a 3 x 3 crossover study. There was a 1-week washout period among the doses. Plasma concentrations of silibinin were monitored by a high-performance liquid chromatography for over a period of 12 hours after the administration. AUCinf (the area under the plasma concentration-time curve from time zero to time infinity) was calculated by the trapezoidal rule extrapolation method. Cmax (maximum plasma drug concentration) and tmax (time to reach a Cmax) were compiled from the plasma concentration-time data. Analysis of variance was carried out using logarithmically transformed AUCinf, AUC(0-12h), and Cmax and untransformed tmax. RESULTS After an oral administration of Liverman capsule, the pharmacokinetic parameters of silibinin, such as AUC(0-12h) (5.59, 4.24 and 13.9 microg/ml x h for Legalon capsule, Silymarin tablet and Liverman capsule, respectively) and AUCinf (6.00, 4.63 and 15.1 microg/ml x h) were significantly greater, Cmax (1.33, 1.13 and 6.04 microg/ml) was significantly higher and tmax (1.83, 2.10 and 0.875 h) was significantly faster than those after Legalon capsule and Silymarin tablet. CONCLUSION These results indicate that the absorption and the extent of relative oral bioavailability of silibinin after Liverman capsule were significantly faster and greater, respectively, than those after Legalon capsule and Silymarin tablet.
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Affiliation(s)
- Y C Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Korea
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Jang SW, Elsasser S, Campbell JL, Kim J. Identification of Cdc6 protein domains involved in interaction with Mcm2 protein and Cdc4 protein in budding yeast cells. Biochem J 2001; 354:655-61. [PMID: 11237870 PMCID: PMC1221697 DOI: 10.1042/0264-6021:3540655] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The Cdc6 protein (Cdc6p) has essential roles in regulating initiation of DNA replication. Cdc6p is recruited to origins of replication by the origin recognition complex (ORC) late in mitosis; Cdc6p in turn recruits minichromosome maintenance (Mcm) proteins to form the pre-replicative complex. Cdc6p is thought to interact with one or more Mcm proteins but this point has not yet been demonstrated. In the present study we observed that Cdc6p interacted significantly only with Mcm2p out of six Mcm proteins in yeast two-hybrid cells. Our results indicate that the interaction of Cdc6p with Mcm2p is specific, although we cannot exclude the possibility that the interaction might not be direct. In attempts to identify domains of Cdc6p important for interaction with Mcm2p, we tested interactions of various deleted versions of Cdc6p with Mcm2p and also with Cdc4p, which was previously known to interact with Cdc6p. The portion of Cdc6p from amino acid residues 51 to 394 was able to interact with Mcm2p. During the course of the studies we also discovered a previously undetected Cdc4p interaction domain between residues 51 and 394. Interestingly, when all six putative Cdc28 phosphorylation sites in Cdc6p were changed to alanine, a 6-7-fold increase in binding to Mcm2p was observed. This result suggests that unphosphorylated Cdc6p has higher affinity than phosphorylated Cdc6p for Mcm2p; this might partly explain the previous observation that Cdc6p failed to load Mcm proteins on replication origins during S phase when the cyclin-dependent protein kinase was active, thus helping to prevent the reinitiation of activated replicons.
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Affiliation(s)
- S W Jang
- Graduate School of Biotechnology, Department of Genetic Engineering, Kyung Hee University, Yongin, Kyonggi-Do, 449-701, Korea
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15
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Abstract
In this study, the degradation of Octastatin, a cyclic octapeptide analog of somatostatin, was examined as a function of pH, temperature, buffer, and ionic strength by reversed-phase gradient high-performance liquid chromatography. Degradation of Octastatin followed a first-order kinetics. Various buffer species such as acetate, ammonium acetate, citrate, glutamate, phosphate, and borate showed differing effects on the degradation of the octapeptide. Good stability was found in glutamate and acetate buffer of pH 4.0. Degradation of Octastatin was greater in citrate- or phosphate-containing buffers than in glutamate or acetate buffers. With phosphate buffer, higher buffer concentration caused greater degradation, while in acetate buffer, the effect of buffer concentration and ionic strength was negligible. In addition, the degradation of Octastatin was markedly inhibited by increasing the concentration of glutamate buffer. This study allows the prediction of good stability in acetate buffer (0.01 M, pH 4.0) with a t90% of 84.1 days at 20 degrees C.
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Affiliation(s)
- S W Jang
- Drug Targeting Laboratory, College of Pharmacy, SungKyunKwan University, Suwon City, South Korea
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16
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Lee CT, Chuang FR, Hsu KT, Lam KK, Liao SC, Liu CC, Chen JB, Jang SW, Chien YS, Pan HH. [Clinical experience of automated double filtration plasmapheresis]. Changgeng Yi Xue Za Zhi 1996; 19:313-9. [PMID: 9041760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Double filtration plasmapheresis, one kind of fractionation plasmapheresis, was developed from membrane type plasmapheresis to remove only the pathogen and return the normal protein back to the patient. We started our automated double filtration plasmapheresis since December 1993. There were 13 patients who received one hundred treatments totally during one year period. And they are myasthenia gravis (8 patients); acute inflammatory demyelinating polyneuropathy (1 patient), multiple myeloma (1 patient); acquired factor VIII inhibitor (1 patient); autoimmune hemolytic anemia (1 patient); systemic lupus erythematous (1 patient). Technically double filtration plasmapheresis is easy to perform and time-saving. It also makes necessity of replacement fluid less frequent. Incidence of complication is rare, and this includes hypotension 2%, palpitation 1%, headache 1%, hemolysis 4%, air emboli 1%, high secondary pressure 2%, and no motality during our treatment. Clinical response is documented in cases of myasthenia gravis; acute inflammatory demyelinating polyneuropathy and acquired factor VIII inhibitor in our study. In conclusion, double filtration plasmapheresis is a time-saving, convenient, and safe therapeutic modality with rare complication. Because its effectiveness on limited kinds of diseases and costs relatively high price, thus plasmapheresis should be used in selected cases and treat aggressively if indicated.
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Affiliation(s)
- C T Lee
- Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, R.O.C
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Abstract
This study reviewed emergency department electrocardiograms of 223 patients with organophosphate poisoning from January 1982 to June 1994: 97 (43.5%) had QTc prolongation and were placed in group A; 126 patients without QTc prolongation were designated as group B. Compared with group B, group A patients had a higher mortality (19.6% v 4.8%, P < .001) and a higher incidence of respiratory failure (56.7% v 20.6%, P < .001). Serum cholinesterase levels were determined in the 223 patients: 92 (41.3%) were classified as severe poisoning. 32 (14.3%) as moderate, 41 (18.1%) as mild, and 58 (25.7%) as very mild. The severe group had a high incidence of QTc prolongation (P < .001), a high incidence of respiratory failure (P < 0.001), and a higher mortality rate (P < 0.001) than the other groups. Of the QTc prolongation patients, 59.8% (55/92) had a high incidence of respiratory failure (78.2% v 35.1%, P < .0001) and a higher mortality rate (29.1% v 8.1%, P < 0.05) compared with 40.2% (37/92) of the patients without QTc prolongation in the severe group. In conclusion, a complete electrocardiogram at the emergency department is important and of prognostic value.
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Affiliation(s)
- F R Chuang
- Poison Center, Chang-Gung Memorial Hospital, Kaohsiung, Taiwan, R.O.C
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Jang SW, Lin JL, Chuang FR. Electrocardiographic findings of organophosphate intoxication in emergency department as predictors of prognosis: a retrospective analysis. Changgeng Yi Xue Za Zhi 1995; 18:120-5. [PMID: 7641103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
To investigate the clinical significance of electrocardiographic (ECG) findings in patients with organophosphate intoxication and to find predictors for prognosis, we reviewed 170 patients whose ECG was taken in the emergency department (ED) from 1981 to 1989. There were 67 cases whose ECG showed prolongation of corrected Q-T interval (QTc). In this group, the mortality rate, respiratory failure rate and frequency of ventricular premature contraction (VPC) were significantly higher than those of patients without QTc prolongation. In the group with presence of VPC, the overall mortality rate and respiratory failure rate were also significantly higher when compared with those without VPC. We concluded that QTc prolongation and the presence of VPCs in patients with organophosphate intoxication may predict their clinical respiratory failure and mortality.
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Affiliation(s)
- S W Jang
- Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, R.O.C
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