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Kim JJ, Kim HY, Choi Z, Hwang SY, Jeong H, Choi JR, Yoon SE, Kim WS, Kim SH, Kim HJ, Shin SY, Lee ST, Kim SJ. In-depth circulating tumor DNA sequencing for prognostication and monitoring in natural killer/T-cell lymphomas. Front Oncol 2023; 13:1109715. [PMID: 36845680 PMCID: PMC9954142 DOI: 10.3389/fonc.2023.1109715] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 01/24/2023] [Indexed: 02/12/2023] Open
Abstract
Background Epstein-Barr virus (EBV) quantitation and current imaging modalities are used for diagnosis and disease monitoring in Extranodal NK/T cell lymphoma (ENKTL) but have limitations. Thus, we explored the utility of circulating tumor DNA (ctDNA) as a diagnostic biomarker. Methods Through in-depth sequencing of 118 blood samples collected longitudinally at different time points from 45 patients, we examined the mutational profile of each sample, estimated its impact on the clinical outcome, and assessed its role as a biomarker in comparison with EBV DNA quantitation. Results The ctDNA concentration was correlated with treatment response, stage, and EBV DNA quantitation. The detection rate of ctDNA mutation was 54.5%, with BCOR (21%) being the most commonly mutated gene in newly diagnosed patients; TP53 mutation (33%) was the most prevalent in patients that experienced a relapse. Additionally, patients in complete remission exhibited a rapid clearance of ENKTL-related somatic mutations, while relapsed patients frequently presented with persisting or emerging mutations. We detected ctDNA mutations in EBV-negative patients (50%) and mutation clearance in EBV-positive patients in remission, suggesting ctDNA genotyping as an efficient complementary monitoring method for ENKTL. Additionally, mutated DDX3X (PFS HR, 8.26) in initial samples predicted poor outcome. Conclusion Our results suggest that ctDNA analysis can be used to genotype at diagnosis and estimate the tumor burden in patients with ENKTL. Furthermore, ctDNA dynamics indicate the potential use of testing it to monitor therapeutic responses and develop new biomarkers for precision ENKTL therapy.
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Affiliation(s)
- Jin Ju Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyun-Young Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Zisun Choi
- Dxome Co. Ltd, 8, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - So yoon Hwang
- Dxome Co. Ltd, 8, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Hansol Jeong
- Dxome Co. Ltd, 8, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Jong Rak Choi
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea,Dxome Co. Ltd, 8, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Sang Eun Yoon
- Division of Haematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Won Seog Kim
- Division of Haematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea,Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Republic of Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sang-Yong Shin
- Department of Laboratory Medicine, Korea Worker’s Compensation & Welfare Service, Taebaek Hospital, Taebaek-si, Gangwon-do, Republic of Korea,*Correspondence: Sang-Yong Shin, ; Seung-Tae Lee, ; Seok Jin Kim,
| | - Seung-Tae Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea,Dxome Co. Ltd, 8, Seongnam-si, Gyeonggi-do, Republic of Korea,*Correspondence: Sang-Yong Shin, ; Seung-Tae Lee, ; Seok Jin Kim,
| | - Seok Jin Kim
- Division of Haematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea,Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul, Republic of Korea,*Correspondence: Sang-Yong Shin, ; Seung-Tae Lee, ; Seok Jin Kim,
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Cho JH, Shin SY. Effects of smoking cessation on the risk of cardiovascular disease: a nationwide population-based study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Cardiovascular disease (CVD) is the global leading cause of death, and the economic and social burden of CVD is still increasing, Smoking is one of the top three leading risk factors for the disease and one of the well-established and important modifiable risk factors for CVD. However, the time course of CVD risk after smoking cessation is unclear.
Purpose
We assess the association between smoking and CVD and the incidence of CVD with years quitting smoking.
Methods
This study used the Korean National Health Insurance Service (NHIS) database. Self-reported smoking habit data were used to classify participants as current, former or never smokers and to investigate the duration and intensity of smoking. Smoking records of participants were updated every 2 years, and all participants whose smoking records were changed or unclear were excluded. The primary outcome was the development of CVD, including myocardial infarction, stroke, heart failure, and cardiovascular death.
Results
Total 5,391,231 participants (953,756 subjects were current smokers, 104,604 subjects were former smokers, 4,432,871 subjects never smoker) were followed-up for an average of 4.2 years. The mean age was 45.8 years, 39.9% were male. Cumulative pack-year (PY) were 14 in current smoker, 10.5 in former smokers at baseline. The median years of quitting smoking for former smoker was 4.
Regardless of whether smoking continues or not, a dose-dependent relationship exists between smoking and CVD (Fig. 1). For those smoked less than 8PY, smoking cessation significantly lowered the CVD risk within 10 years compared to current smokers, and the CVD risk was not significantly different from never smokers (Fig. 2A). However, in the case of smokers over 8PY, although smoking cessation affects the reduction of CVD, the CVD risk decreases slowly over decades, and it takes more than 20 years for the effect of smoking on the CVD risk to disappear (Fig. 2B).
Conclusion
Smoking and CVD have a dose-dependent relationship, and mild smokers with less than 8PY had a similar CVD risk to never smokers when quitting smoking. However, for heavy smokers over 8PY, it takes a long time for the CVD risk from smoking to disappear
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- J H Cho
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - S Y Shin
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
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Shin SY, Jung M, Byeon K, Kang K. Intracardiac echocardiographically guided permanent pacemaker implantation is a feasible imaging tool with comparable procedural efficacy and safety. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.492] [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: 11/15/2022] Open
Abstract
Abstract
Background
Amongst cardiovascular interventions, pacemaker implantation procedure is one of the most hazardous in terms of radiation exposure due to its proximity and unprotected radiation exposure. In order to reduce radiation hazards, alternative imaging tool to guide pacemaker implantation should be sought. The aim of this study is to investigate the feasibility, efficacy, and safety of intracardiac echocardiographically (ICE) guided pacemaker implantation.
Methods
We retrospectively investigated pacemaker implantation with ICE guidance. ICE catheter was placed in right atrium (RA). Right ventricular (RV) lead was placed in RV apex within home view (low RA, 2-4 O'clock). Then RA lead was placed in RA appendage within mid RA 1-2 O'clock view. Fluoroscopy was used only for verifying lead redundancy (2 or 3 second duration before pocket closure). Other procedure steps were similarly performed as in conventional fluoroscopic method. Radiation dosage, patient safety, total procedure time, and lead parameters were assessed and compared.
Results
From June 2013 to March 2021, a total of 270 patients underwent pacemaker implantation either with ICE or with fluoroscopy. Amongst them, ICE guided implantation was attempted in 35 patients. In order to exclude potential bias caused by the operator's learning curve, we excluded early 5 cases out of ICE group. Radiation exposure was markedly decreased within ICE group (2.3±4.4 Gy cm2 in ICE group vs. 27.2±50.5 Gy cm2 in fluoroscopy group, P<0.001). The total procedure time and complication rate showed no significant difference between groups. In ICE group, atrial lead parameters were better than those of fluoroscopy group (impedance 454±57 Ω vs. 533±125 Ω, P<0.001).
Conclusion
In 30 patients with ICE guided pacemaker implantation, radiation exposure was markedly decreased without any trade-offs in terms of patients' safety and procedural success. Furthermore, operation team members' physical stress reduction also might be potentially guaranteed.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- S Y Shin
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - M Jung
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - K Byeon
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - K Kang
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
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Shin SY, Jung M, Kang K, Byeon K. Net clinical benefit of NOAC in Korean atrial fibrillation patients with low to intermediate stroke risk. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
The balance of stroke risk reduction and potential hemorrhagic risk associated with anti-thrombotic treatment (ATT) remain unclear in Korean atrial fibrillation (AF) patients with low to intermediate stroke risk, defined as non-gender CHA2DS2-VASc score 0–1.
Purpose
The net clinical benefit (NCB) analysis of ATT may be helpful to guide stroke prevention strategy in AF patients with non-gender CHA2DS2-VASc score 0–1.
Methods
This Korean multi-center cohort study retrospectively evaluated the clinical outcomes with single antiplatelet (SAPT), vitamin K antagonist (VKA), and non-vitamin K antagonist oral anticoagulant (NOAC) in non-gender CHA2DS2-VASc score 0–1 and further stratified by biomarker-based ABCD score (Age [≥60 years], B-type natriuretic peptide [BNP] or N-terminal pro-BNP [≥300 pg/ml], Creatinine clearance [<50 ml/min/1.73 m2], and Dimension of the left atrium [≥45 mm]). The primary outcome was the NCB of ATT including thromboembolic and major bleeding events.
Results
We included 2465 patients (56.2±9.5 years; female, 665 [27.0%]) followed-up for 4.0±2.8 years, of whom 661 (26.8%) were treated with SAPT; 423 (17.2%) with VKA; and 1040 (42.2%) with NOAC. In comparison with no treatment, only NOAC demonstrated a positive tendency for stroke prevention (NOAC, NCB 0.47, 95% confidence interval [CI] −0.40 to 2.10; SAPT, NCB −0.31, 95% CI −1.48 to 1.40; and VKA, NCB −1.26, 95% CI −2.97 to 0.67). With detailed risk stratification with ABCD score, NOAC showed a significant NCB for stroke prevention compared with SAPT and VKA (SAPT vs. NOAC, NCB 1.6, 95% CI 0.26–3.50; VKA vs. NOAC, NCB 1.96, 95% CI 0.47–4.16) in patients with ABCD score ≥1. ATT failed to show NCB in patients with truly low stroke risk defined as ABCD score=0.
Conclusion
Korean AF cohort with low to intermediate stroke risk indicates that, in comparison with no ATT, only ATT with NOAC showed marginal NCB. With further risk stratification by ABCD score, NOAC showed significant advantages over other ATTs (VKA or SAPT) in patients with ABCD ≥1.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Korean Disease Control and Prevention Agency
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Affiliation(s)
- S Y Shin
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - M Jung
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - K Kang
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - K Byeon
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
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Shin SY, Jung M, Byeon K, Kang K, Park Y, Hwang Y, Lee S, Jin E, Roh S, Kim J, Ahn J, Lee S, Choi E, Ahn M, Lip G. External validation of the biomarker based ABCD score in atrial fibrillation patients with a non gender CHA2DS2 VASc score 0 to 1, A Korean multicenter retrospective cohort. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Patients with low to intermediate risk atrial fibrillation (AF), defined as non-gender CHA2DS2-VASc score of 0–1, are still at risk of stroke. This study verified the usefulness of ABCD score (Age [≥60 years], B-type natriuretic peptide [BNP] or N-terminal pro-BNP [≥300 pg/ml], Creatinine clearance [<50 ml/min/1.73 m2], and Dimension of the left atrium [≥45 mm]) for stroke risk stratification in non-gender CHA2DS2-VASc score 0–1.
Methods
This multi-center cohort study retrospectively analyzed AF patients with non-gender CHA2DS2-VASc score 0–1. The primary endpoint was the incidence of stroke with or without anti-thrombotic treatment (ATT). An ABCD score was also validated.
Results
Overall, 2694 patients (56.3±9.5 years; female, 726 [26.9%]) were followed-up for 4.0±2.8 years. The overall stroke rate was 0.84/100 person-years (P-Y), stratified as follows: 0.46/100P-Y for an ABCD score 0; 1.02/100P-Y for an ABCD score≥1. The ABCD score was superior to the non-gender CHA2DS2-VASc score in stroke risk stratification (C-index=0.618, P=0.015; net reclassification improvement=0.576, P=0.040; integrated differential improvement=0.033, P=0.066). ATT was prescribed in 2353 patients (86.5%), and the stroke rate was significantly lower in patients receiving non-vitamin K antagonist oral anticoagulant (NOAC) therapy and an ABCD score≥1 than in those without ATT (0.44/100P-Y versus 1.55/100 P-Y; hazard ratio=0.26, 95% confidence interval 0.11–0.63, P=0.003).
Conclusion
The biomarker-based ABCD score demonstrated improved stroke risk stratification in AF patients with non-gender CHA2DS2-VASc score 0–1. Furthermore, NOAC with an ABCD score≥1 was associated with significantly lower stroke rate in AF patients with a non-gender CHA2DS2-VASc score 0–1.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Korean Disease Control and Prevention Agency
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Affiliation(s)
- S Y Shin
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - M Jung
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - K Byeon
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - K Kang
- Chung-Ang University Hospital , Seoul , Korea (Republic of)
| | - Y Park
- Gachon University Gil Medical Center , Incheon , Korea (Republic of)
| | - Y Hwang
- St. Vincent's Hospital , Suwon , Korea (Democratic People's Republic of)
| | - S Lee
- Kangbuk Samsung Hospital , Seoul , Korea (Republic of)
| | - E Jin
- Kyunghee University , Seoul , Korea (Republic of)
| | - S Roh
- Korea University Guro Hospital , Seoul , Korea (Democratic People's Republic of)
| | - J Kim
- Korea University Ansan Hospital, Cardiology , Ansan-Si , Korea (Republic of)
| | - J Ahn
- Pusan National University Hospital , Pusan , Korea (Republic of)
| | - S Lee
- Seoul National University Hospital , Seoul , Korea (Republic of)
| | - E Choi
- Seoul National University Hospital , Seoul , Korea (Republic of)
| | - M Ahn
- Wonju Severance Christian Hospital , Wonju , Korea (Republic of)
| | - G Lip
- University of Liverpool , Liverpool , United Kingdom
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Cho I, Shin SY, Kim WD, Kim YD, Cha MJ, Jung HG, Won HY, Lee WS, Kim TH, Kim CJ, Kim SW, Choi Y. P997Improving left atrial appendage occluder size determination by using 3-dimensional printing model of the left atrial appendage. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Given the complexity of left atrial appendage (LAA) structure, current 2D based LAA occluder (LAAO) size prediction system using transesophageal echocardiography (TEE) has limitations.
Objective
To assess the accuracy of LAAO size determination method by implantation simulation using a 3D printed model compared with a conventional method based on TEE.
Methods
We retrospectively reviewed 57 cases with percutaneous LAAO using Amplatzer Cardiac Plug and Amulet from 2014 to 2018. We excluded cases without cardiac CT (21 cases) or with peri-device leakage or inappropriate position of the device on six months follow up TEE (6 cases), or with paroxysmal atrial fibrillation (2 cases). We finally included 28 cases with anatomically and physiologically properly implanted LAAO, using the final size of the implanted devices as a standard for the size prediction accuracy. We generated 3D printing model from cardiac CT images. LAAO size was determined with device implantation simulation using 3D printing model and occluder devices (Figure C), and conventional 2D TEE measurements by two experienced cardiologists who were blinded to the size of the finally implanted device.
Results
The accuracy in size of 3D printed left atrium (LA) models, compared with CT image sources, were validated by measuring the distance between artifacts which were intentionally implanted to LA model during image processing. There was minimal bias (−0.11 mm) between 3D images and printed LA models (Figure A). As plotted in Figure B, LAAO sizing by implantation simulation with 3D printing model showed excellent agreement with actually implanted LAAO size (r=0.927; bias=0.7±2.5), while LAAO sizing by 2D TEE measurements remained poor (r=0.544; bias 2.3±6.7).
Conclusions
LAAO size determination by using 3D printing model of LAA showed excellent accuracy. A prospective study to evaluate the clinical utility of this method should be done in future.
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Affiliation(s)
- I Cho
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - S Y Shin
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - W D Kim
- Chung Ang University, College of Medicine, Department of Medicine, Seoul, Korea (Republic of)
| | - Y D Kim
- Chung Ang University, College of Engineering, Department of Mechanical Engineering, Seoul, Korea (Republic of)
| | - M J Cha
- Chung-Ang University Hospital, Department of Radiology, Seoul, Korea (Republic of)
| | - H G Jung
- Chung Ang University, College of Medicine, Department of Medicine, Seoul, Korea (Republic of)
| | - H Y Won
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - W S Lee
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - T H Kim
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - C J Kim
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - S W Kim
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - Y Choi
- Chung Ang University, College of Engineering, Department of Mechanical Engineering, Seoul, Korea (Republic of)
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Lim HE, Ahn J, Han SJ, Shim J, Kim YH, Choi EK, Oh S, Shin SY, Lip GYH. P1026Risk factors for the occurrence of stroke after atrial fibrillation ablation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0617] [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
Risk factors for the occurrence of embolic stroke (ES) after atrial fibrillation (AF) ablation have not been fully elucidated. Our aim was to assess incidence of ES during long-term follow-up following AF ablation and to identify predicting factors associated with post-ablation ES.
Methods
We enrolled patients who experienced ES after AF ablation and body mass index-matched controls from AF ablation registries. Epicardial adipose tissue (EAT) was assessed using multislice computed tomography prior to ablation.
Results
A total of 3,464 patients who underwent AF ablation were recruited. During a mean follow-up of 47.2 months, ES occurred in 47 patients (1.36%) with a mean CHA2DS2-VAS score of 2.15 and overall incidence of ES was 0.34 per 100 patients/year. Compared with control group (n=190), ES group had more higher prior thromboembolic event and AF recurrence rates, larger LA size, lower creatinine clearance rate (CCr), and greater total and periatrial EAT volumes although no differences in AF type, CHA2DS2-VASc score, ablation extent, and anti-thrombotics use were found. On multivariate regression analysis, a prior history of thromboembolism, CCr, and periatrial EAT volume were independently associated with ES occurrence after AF ablation.
Cox regression analysis Risk factor Univariate Multivariate HR (95% CI) p value HR (95% CI) p value Age 1.017 (0.984–1.051) 0.31 Prior thromboembolism 2.488 (1.134–5.460) 0.023 2.916 (1.178–7.219) 0.021 CHA2DS2-VASc score 1.139 (0.899–1.445) 0.282 CCr 0.984 (0.970–0.999) 0.038 0.982 (0.996–0.998) 0.029 LA diameter (mm) 1.070 (1.012–1.130) 0.017 1.072 (0.999–1.150) 0.054 EAT_total (ml) 1.020 (1.010–1.029) <0.001 1.008 (0.993–1.023) 0.297 EAT_periatrial (ml) 1.085 (1.045–1.126) <0.001 1.065 (1.005–1.128) 0.032 PVI + additional ablation 0.846 (0.460–1.557) 0.592 No anticoagulant use 0.651 (0.346–1.226) 0.184 Recurrence 2.011 (1.007–4.013) 0.048 1.240 (0.551–2.793) 0.603 CCr, creatinine clearance rate; EAT, epicardial adipose tissue; LA, left atrium; PVI, pulmonary vein isolation.
K-M curve for stroke-free survival
Conclusions
Incidence of ES after AF ablation was lower than expected rate based on CHA2DS2-VASc score even though anticoagulants use was limited. Periatrial EAT volume, a prior thromboembolism event, and CCr were independent factors in predicting ES irrespective of AF recurrence and CHA2DS2-VASc score in patients who underwent AF ablation.
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Affiliation(s)
- H E Lim
- Hallym University Sacred Heart Hospital, Cardiology, Anyang-Si, Gyeonggi-Do, Korea (Republic of)
| | - J Ahn
- Pusan National University Hospital, Cardiology, Pusan, Korea (Republic of)
| | - S J Han
- Hallym University Sacred Heart Hospital, Cardiology, Anyang-Si, Gyeonggi-Do, Korea (Republic of)
| | - J Shim
- Korea University Anam Hospital, Cardiology, Seoul, Korea (Republic of)
| | - Y H Kim
- Korea University Anam Hospital, Cardiology, Seoul, Korea (Republic of)
| | - E K Choi
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - S Oh
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - S Y Shin
- Chung-Ang University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - G Y H Lip
- Liverpool Heart and Chest Hospital, Cardiovascular Science Centre, Liverpool, United Kingdom
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Shin SY. Comprehensive Laboratory Analysis of Korean Acute Alcoholic Intoxication Patients Reveals the Need for a National Hepatitis B Virus Vaccination Program in Korea. Korean J Fam Med 2018; 39:360-363. [PMID: 30369218 PMCID: PMC6250946 DOI: 10.4082/kjfm.17.0135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/29/2017] [Accepted: 04/10/2018] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Acute alcoholic intoxication patients (AAIP) are a common public health problem. The aim of this study was to perform a comprehensive laboratory analysis for these patients to investigate the co-morbid medical problem. METHODS We retrospectively reviewed laboratory findings of AAIP who were transferred to the emergency department (ED) from January 2017 to June 2017. RESULTS A total of 160 male patients were enrolled. Sixteen patients (16/160, 10.0%) and three patients (3/160, 1.9%) had macrocytic anemia and microcytic anemia, respectively. A total of 33 patients (33/160, 20.6%) showed thrombocytopenia (<150×109 /L). Twelve patients (12/159, 7.5%) showed low serum albumin level (<3.5 g/dL). Three patients (3/160, 1.9%) had chronic kidney disease stages 3-4 based on estimated glomerular filtration rate. Six patients (6/27, 22.2%) had high hemoglobin A1c (HbA1c) level (>7.0%). Positive rates of hepatitis B surface antigen and antiHBs antibody (anti-HBs Ab) were 3.5% (5/141) and 49.0% (68/141), respectively. CONCLUSION Patients with AAIP who were transferred to ED had various laboratory abnormalities (anemia, thrombocytopenia, high HbA1c). They had low positive rate of anti-HBs Ab. This might be a public health problem, suggesting the need of hepatitis B virus vaccination program for AAIP. Our data suggest the need of further nationwide studies.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Seoul Metropolitan Dongbu Hospital, Seoul, Korea
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Shin SY, Lee ST, Kim HJ, Cho EH, Kim JW, Park S, Jung CW, Kim SH. Mutation profiling of 19 candidate genes in acute myeloid leukemia suggests significance of DNMT3A mutations. Oncotarget 2018; 7:54825-54837. [PMID: 27359055 PMCID: PMC5342384 DOI: 10.18632/oncotarget.10240] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 05/13/2016] [Indexed: 11/25/2022] Open
Abstract
We selected 19 significantly-mutated genes in AMLs, including FLT3, DNMT3A, NPM1, TET2, RUNX1, CEBPA, WT1, IDH1, IDH2, NRAS, ASXL1, SETD2, PTPN11, TP53, KIT, JAK2, KRAS, BRAF and CBL, and performed massively parallel sequencing for 114 patients with acute myeloid leukemias, mainly including those with normal karyotypes (CN-AML). More than 80% of patients had at least one mutation in the genes tested. DNMT3A mutation was significantly associated with adverse outcome in addition to conventional risk stratification such as the European LeukemiaNet (ELN) classification. We observed clinical usefulness of mutation testing on multiple target genes and the association with disease subgroups, clinical features and prognosis in AMLs.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Center for Diagnostic Oncology, Hospital and Research Institute, National Cancer Center, Goyang, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | | | - Jong-Won Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Silvia Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chul Won Jung
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Ha EJ, Baek SM, Baek JH, Shin SY, Han M, Kim CH. Efficacy and Safety of Ethanol Ablation for Branchial Cleft Cysts. AJNR Am J Neuroradiol 2017; 38:2351-2356. [PMID: 28970243 DOI: 10.3174/ajnr.a5373] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 07/10/2017] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Branchial cleft cyst is a common congenital lesion of the neck. This study evaluated the efficacy and safety of ethanol ablation as an alternative treatment to surgery for branchial cleft cyst. MATERIALS AND METHODS Between September 2006 and October 2016, ethanol ablation was performed in 22 patients who refused an operation for a second branchial cleft cyst. After the exclusion of 2 patients who were lost to follow-up, the data of 20 patients were retrospectively evaluated. All index masses were confirmed as benign before treatment. Sonography-guided aspiration of the cystic fluid was followed by injection of absolute ethanol (99%) into the lesion. The injected volume of ethanol was 50%-80% of the volume of fluid aspirated. Therapeutic outcome, including the volume reduction ratio, therapeutic success rate (volume reduction ratio of >50% and/or no palpable mass), and complications, was evaluated. RESULTS The mean index volume of the cysts was 26.4 ± 15.7 mL (range, 3.8-49.9 mL). After ablation, the mean volume of the cysts decreased to 1.2 ± 1.1 mL (range, 0.0-3.5 mL). The mean volume reduction ratio at last follow-up was 93.9% ± 7.9% (range, 75.5%-100.0%; P < .001). Therapeutic success was achieved in all nodules (20/20, 100%), and the symptomatic (P < .001) and cosmetic (P < .001) scores had improved significantly by the last follow-up. In 1 patient, intracystic hemorrhage developed during the aspiration; however, no major complications occurred in any patient. CONCLUSIONS Ethanol ablation is an effective and safe treatment for patients with branchial cleft cysts who refuse, or are ineligible for, an operation.
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Affiliation(s)
- E J Ha
- From the Departments of Radiology (E.J.H., M.H.)
| | - S M Baek
- Department of Radiology (S.M.B., S.Y.S.), Sharing and Happiness Hospital, Busan, Korea
| | - J H Baek
- Department of Radiology and Research (J.H.B.), Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - S Y Shin
- Department of Radiology (S.M.B., S.Y.S.), Sharing and Happiness Hospital, Busan, Korea
| | - M Han
- From the Departments of Radiology (E.J.H., M.H.)
| | - C-H Kim
- Otolaryngology (C.-H.K.), Ajou University School of Medicine, Suwon, Korea
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11
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Shin SY, Eom HS, Sohn JY, Lee H, Park B, Joo J, Jang JH, Lee MN, Kim JK, Kong SY. Prognostic Implications of Monosomies in Patients With Multiple Myeloma. Clin Lymphoma Myeloma Leuk 2016; 17:159-164.e2. [PMID: 28089441 DOI: 10.1016/j.clml.2016.12.001] [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] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/21/2016] [Accepted: 12/14/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND Cytogenetic analysis aides in risk stratification for patients with multiple myeloma (MM). Although several cytogenetic aberrations have been reported to be prognostic, less is known about the association between the presence of monosomies and prognosis. The present study evaluated the prevalence and prognostic implications of monosomies in patients with MM. MATERIALS AND METHODS Karyotypes were determined using conventional cytogenetics and fluorescence in situ hybridization (FISH). The prognostic effect of monosomies was evaluated by comparison with the clinical factors in MM patients with normal karyotypes. RESULTS Karyotypes were successfully determined in 167 of the 170 patients with MM. Of these 167 patients, 52 (31.1%) had abnormal karyotypes. Univariable analyses showed that a normal karyotype, hypodiploidy, monosomies of chromosomes 13 and 16, deletion or monosomy of 13q14, and loss of X detected by metaphase analysis were each associated with reduced progression-free survival (P < .05 for each). Univariable analyses showed that a normal karyotype, hypodiploidy, monosomies of chromosomes 13 and 16, deletion or monosomy of 13q14 detected by metaphase analysis and FISH-determined RB1 (13q)/TP53 (17p) deletion were each associated with reduced overall survival (P < .05 for each). Multivariable analysis showed that hypodiploidy detected by metaphase analysis was independently prognostic of shorter progression-free survival (P < .05 for each) and that hypodiploidy, monosomy 16, and loss of Y chromosome and FISH-determined TP53 (17p) deletion were associated with reduced overall survival (P < .05 for each). CONCLUSION In addition to known cytogenetic abnormalities, such as monosomy 13, hypodiploidy, and TP53 (17p) deletion, monosomy 16 and loss of the Y chromosome have adverse prognostic implications in patients with MM.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Center for Diagnostic Oncology and Translational Epidemiology Research Branch, Hospital and Research Institute, National Cancer Center, Goyang, Korea
| | - Hyeon-Seok Eom
- Department of Hematology-Oncology, Center for Hematologic Malignancy, National Cancer Center, Goyang, Korea; Department of System Cancer Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea
| | - Ji Yeon Sohn
- Department of Laboratory Medicine, Center for Diagnostic Oncology and Translational Epidemiology Research Branch, Hospital and Research Institute, National Cancer Center, Goyang, Korea
| | - Hyewon Lee
- Department of Hematology-Oncology, Center for Hematologic Malignancy, National Cancer Center, Goyang, Korea; Hematologic Malignancy Branch, Research Institute, National Cancer Center, Goyang, Korea
| | - Boram Park
- Biometric Research Branch, Research Institute, National Cancer Center, Goyang, Korea
| | - Jungnam Joo
- Biometric Research Branch, Research Institute, National Cancer Center, Goyang, Korea
| | | | - Mi-Na Lee
- Green Cross Laboratories, Yongin, Korea
| | - Jung Kwon Kim
- Department of Laboratory Medicine, Center for Diagnostic Oncology and Translational Epidemiology Research Branch, Hospital and Research Institute, National Cancer Center, Goyang, Korea
| | - Sun-Young Kong
- Department of Laboratory Medicine, Center for Diagnostic Oncology and Translational Epidemiology Research Branch, Hospital and Research Institute, National Cancer Center, Goyang, Korea; Department of Hematology-Oncology, Center for Hematologic Malignancy, National Cancer Center, Goyang, Korea; Department of System Cancer Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea; Translational Epidemiology Research Branch, Research Institute, National Cancer Center, Goyang, Korea.
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12
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Shin SY, Pozzi A, Boyd SK, Clark AL. Integrin α1β1 protects against signs of post-traumatic osteoarthritis in the female murine knee partially via regulation of epidermal growth factor receptor signalling. Osteoarthritis Cartilage 2016; 24:1795-1806. [PMID: 27211864 DOI: 10.1016/j.joca.2016.05.013] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 04/06/2016] [Accepted: 05/11/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the role of integrin α1β1 in the progression of post-traumatic osteoarthritis (PTOA), and elucidate the contribution of epidermal growth factor receptor (EGFR) signalling to the mechanism by which integrin α1β1 might control PTOA. We hypothesised that integrin α1β1 plays a protective role in the course of PTOA and that the effect of PTOA (e.g., synovitis, loss of cartilage and growth of osteophytes) would be exacerbated in mice lacking integrin α1β1 at every time point post destabilisation of medial meniscus (DMM). METHODS DMM or sham surgery was performed on integrin α1-null and wild type (WT) mice and the progression of PTOA analysed at 2, 4, 8 and 12 weeks post-surgery (PS) using micro-computed tomography (microCT), histology, and immunohistochemistry. In addition, the effects of EGFR blockade were examined by treating the mice with the EGFR inhibitor erlotinib. RESULTS Integrin α1-null female, but not male, mice showed earlier cartilage degradation post DMM surgery compared to WT controls. Furthermore, erlotinib treatment resulted in significantly less cartilage damage in integrin α1-null but not WT mice. Independent of genotype, erlotinib treatment significantly mitigated the effects of PTOA on many tissues of female mice including meniscal and fabella bone volume, subchondral bone thickness and density and cartilage degradation. In contrast, reduced EGFR signalling had little effect on signs of PTOA in male mice. CONCLUSION Integrin α1β1 protects against PTOA-induced cartilage degradation in female mice partially via the reduction of EGFR signalling. Furthermore, reduction of EGFR signalling protects against the development of PTOA in female, but not male mice.
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Affiliation(s)
- S Y Shin
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - A Pozzi
- Department of Medicine, Vanderbilt University, Nashville, TN, USA; Department of Medicine, Veterans Affairs Hospital, Nashville, TN, USA
| | - S K Boyd
- Department of Radiology, Faculty of Medicine, University of Calgary, Calgary, AB, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - A L Clark
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada; Department of Surgery, Faculty of Medicine, University of Calgary, Calgary, AB, Canada.
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13
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Shin SY, Lee ST, Kim HY, Park CH, Kim HJ, Kim JW, Kim SJ, Kim WS, Kim SH. Detection of MYD88 L265P in patients with lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia and other B-cell non-Hodgkin lymphomas. Blood Res 2016; 51:181-186. [PMID: 27722129 PMCID: PMC5054250 DOI: 10.5045/br.2016.51.3.181] [Citation(s) in RCA: 9] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 04/24/2016] [Accepted: 05/31/2016] [Indexed: 02/01/2023] Open
Abstract
Background Recent studies have identified a high prevalence of the MYD88 L265P mutation in lymphoplasmacytic lymphoma (LPL)/Waldenstrom macroglobulinemia (WM) cases, whereas low frequencies have been observed in other B cell non-Hodgkin lymphomas (NHLs). Methods We evaluated the sensitivity of the mutant enrichment 3'-modified oligonucleotide (MEMO)-PCR technique, a new detection method. We examined the MYD88 L265P mutation in a series of Korean patients with LPL/WM and other B cell NHLs in bone marrow aspirates, using the MEMO-PCR technique. Results The sensitivity of MEMO-PCR was estimated to be approximately 10-16.7%. MYD88 L265P was detected in 21 of 28 LPL cases (75%) and only three of 69 B cell NHL cases (4.3%). Conclusion Although MEMO-PCR had relatively low sensitivity, we confirmed the high prevalence of the MYD88 L265P mutation in Korean LPL patients. Our study suggests the diagnostic value of MYD88 L265P for differentiating B-cell NHLs.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Center for Diagnostic Oncology, Hospital and Research Institute, National Cancer Center, Goyang, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun-Young Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chang-Hun Park
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jong-Won Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seok Jin Kim
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Won Seog Kim
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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14
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Shin SY, Bang SM, Kim HJ. A Novel Hemoglobin Variant Associated with Congenital Erythrocytosis: Hb Seoul [β86(F2)Ala→Thr] (HBB:c.259G>A). Ann Clin Lab Sci 2016; 46:312-314. [PMID: 27312559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report the identification of a novel hemoglobin (Hb) variant [β86(F2)Ala→Thr; HBB: c.259G>A], Hb Seoul, causing congenital erythrocytosis due to high oxygen affinity. The patient was a 33-year-old Korean man with isolated erythrocytosis. JAK2 somatic mutations were negative. Direct sequencing analyses revealed that the patient was heterozygous for c.259G>A, while other known causative genes (BPGM, EGLN1, EPAS, EPOR and VHL) had no mutation. β86(F2) is a critical residue that affects the oxygen affinity. The novel variant in our patient, Hb Seoul, adds to the previously reported 4 other Hb variants from β86(F2) substitutions that cause congenital erythrocytosis.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Soo-Mi Bang
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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15
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Seo SK, Kim KY, Han SA, Yoon JS, Shin SY, Sohn SK, Moon JH. First Korean case of Emberger syndrome (primary lymphedema with myelodysplasia) with a novel GATA2 gene mutation. Korean J Intern Med 2016; 31:188-90. [PMID: 26767875 PMCID: PMC4712426 DOI: 10.3904/kjim.2016.31.1.188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 08/19/2014] [Accepted: 10/15/2014] [Indexed: 11/27/2022] Open
Affiliation(s)
- Sang Kyung Seo
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Kyu Yeun Kim
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Seo Ae Han
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Joon Seok Yoon
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang Kyun Sohn
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Joon Ho Moon
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
- Correspondence to Joon Ho Moon, M.D. Department of Hematology/Oncology, Kyungpook National University Hospital, 130 Dongdeok-ro, Junggu, Daegu 41944, Korea Tel: +82-53-200-6314 Fax: +82-53-426-2046 E-mail:
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16
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Affiliation(s)
- Sang-Yong Shin
- a Department of Laboratory Medicine , Gyeongsang National University School of Medicine , Jinju , Korea
| | - Seung-Tae Lee
- b Department of Laboratory Medicine , Yonsei University College of Medicine , Seoul , Korea
| | - Chang-Hun Park
- c Department of Laboratory Medicine & Genetics , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Korea
| | - Hee-Jin Kim
- c Department of Laboratory Medicine & Genetics , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Korea
| | - Sun-Hee Kim
- c Department of Laboratory Medicine & Genetics , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Korea
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17
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Kong C, Shin SY, Park CS, Kim BG. Effects of Feeding Barley Naturally Contaminated with Fusarium Mycotoxins on Growth Performance, Nutrient Digestibility, and Blood Chemistry of Gilts and Growth Recoveries by Feeding a Non-contaminated Diet. Asian-Australas J Anim Sci 2015; 28:662-70. [PMID: 25715687 PMCID: PMC4412996 DOI: 10.5713/ajas.14.0707] [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] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/08/2014] [Accepted: 12/03/2014] [Indexed: 11/27/2022]
Abstract
The objectives of this study were to investigate the effects of feeding barley naturally contaminated with Fusarium mycotoxins on growth performance, vulva swelling, and digestibility of dry matter, organic matter, and crude protein of gilts and the recovery of gilts fed normal diets immediately after the exposure to contaminated diets by measuring growth performance and vulva swelling. In Exp. 1, four diets were prepared to contain 0%, 15%, 30%, or 45% contaminated barley containing 25.7 mg/kg deoxynivalenol and 26.0 μg/kg zearalenone. Sixteen gilts with an initial body weight (BW) of 33.3 kg (standard deviation = 3.0) were individually housed in a metabolism crate and assigned to 4 diets with 4 replicates in a randomized complete block design based on BW. During the 14-d feeding trial, individual BW and feed consumption were measured weekly and the vertical and horizontal lengths of vulva were measured every 3 d. From d 10, feces were collected by the maker-to-marker method for 4 d. Blood samples were collected on d 14. During the overall period, the average daily gain, average daily feed intake, and gain:feed of pigs linearly decreased (p<0.01) as the dietary concentration of contaminated barley increased. However, the digestibility of crude protein was linearly increased (p = 0.011) with the increasing amounts of contaminated barley. Increasing dietary Fusarium mycotoxin concentrations did not influence vulva size, blood characteristic as well as immunoglobulin level of pigs. In the Exp. 2, a corn-soybean meal-based diet was formulated as a recovery diet. Pigs were fed the recovery diet immediately after completion of the Exp. 1. During the 14-d of recovery period, the individual BW and feed consumption were measured weekly and the vertical and horizontal length of vulva were measured every 3 d from d 0. On d 7, the feed intake of pigs previously fed contaminated diets already reached that of pigs fed a diet with 0% contaminated barley and no significant difference in growth performance among treatments was observed during d 7 to 14 of the recovery period. In conclusion, increasing levels of mycotoxins in diets linearly decreased the growth performance of pigs, and these damages can be recovered in 7 d after the diet was replaced with a normal diet. The vulva size, blood characteristic, immune responses were not affected by increasing level of contaminated barley in the diets fed to pigs.
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Affiliation(s)
- C Kong
- Department of Animal Science and Technology, Konkuk University, Seoul 143-701, Korea
| | - S Y Shin
- Department of Animal Science and Technology, Konkuk University, Seoul 143-701, Korea
| | - C S Park
- Department of Animal Science and Technology, Konkuk University, Seoul 143-701, Korea
| | - B G Kim
- Department of Animal Science and Technology, Konkuk University, Seoul 143-701, Korea
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18
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Shin SY, Jung CW, Choi DC, Lee BJ, Kim HJ, Kim SH. Chronic eosinophilic leukemia with a FIP1L1-PDGFRA rearrangement: Two case reports and a review of Korean cases. Blood Res 2015; 50:58-61. [PMID: 25830134 PMCID: PMC4377343 DOI: 10.5045/br.2015.50.1.58] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 08/05/2014] [Accepted: 02/12/2015] [Indexed: 11/22/2022] Open
Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chul-Won Jung
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dong-Chull Choi
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Byung-Jae Lee
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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19
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Shin SY, Lee ST, Kim HJ, Ki CS, Jung CW, Kim JW, Kim SH. BRAF V600E and MAP2K1 mutations in hairy cell leukemia and splenic marginal zone lymphoma cases. Ann Lab Med 2015; 35:257-9. [PMID: 25729732 PMCID: PMC4330180 DOI: 10.3343/alm.2015.35.2.257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 08/22/2014] [Accepted: 12/16/2014] [Indexed: 12/30/2022] Open
Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chang-Seok Ki
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chul Won Jung
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jong-Won Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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20
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Shin SY, Lee K, Jang MA, Lee ST, Yoo KH, Koo HH, Kim DS, Kim HJ, Kim SH. First report on familial hemophagocytic lymphohistiocytosis with an abnormal immunophenotype and T cell monoclonality in Korea. Ann Lab Med 2015; 35:155-8. [PMID: 25553300 PMCID: PMC4272951 DOI: 10.3343/alm.2015.35.1.155] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/16/2014] [Accepted: 10/29/2014] [Indexed: 11/26/2022] Open
Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyunghoon Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Mi-Ae Jang
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Keon Hee Yoo
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hong Hoe Koo
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dae Shick Kim
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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21
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Shin SY, Cho JH, Kim HJ, Jang JH, Lee ST, Kim SH. Two cases of acute lymphoblastic leukemia with an e1a3 BCR-ABL1 fusion transcript. Ann Lab Med 2014; 35:159-61. [PMID: 25553301 PMCID: PMC4272952 DOI: 10.3343/alm.2015.35.1.159] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/11/2014] [Accepted: 11/14/2014] [Indexed: 11/19/2022] Open
Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jin-Hee Cho
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jun-Ho Jang
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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22
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Shin SY, Ki CS, Kim HJ, Kim JW, Kim SH, Lee ST. Mutant Enrichment with 3'-Modified Oligonucleotides (MEMO)-Quantitative PCR for Detection of NPM1 Mutations in Acute Myeloid Leukemia. J Clin Lab Anal 2014; 29:361-5. [PMID: 25384962 DOI: 10.1002/jcla.21779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Revised: 04/10/2014] [Accepted: 04/29/2014] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Detection of NPM1 mutations in acute myeloid leukemia (AML) is important for risk stratification, treatment decision, and therapeutic monitoring. We have designed a real-time PCR method implementing the Mutant enrichment with 3'-modified oligonucleotides (MEMO) technique to detect NPM1 mutations and validated its utility in clinical samples. METHODS Sensitivity and linearity were evaluated using serially diluted NPM1-positive samples. Clinical usefulness was assessed by measuring the levels of mutant alleles in 29 patients at diagnosis and in ten patients after induction chemotherapy. RESULTS Excellent linear relationships between the mutant allele proportion and the threshold cycle (Ct) values (r = 0.999) were observed in a range of 1:1-1:10(3) . MEMO-PCR was able to detect NPM1 mutations regardless of mutant type and also detected novel mutants (964_967delTGGAinsATGATGTC, 957_959delCTGinsATGCATG, 960insTAAG, and 960insTCAG). The concentrations of NPM1 mutant alleles decreased after induction chemotherapy in accordance with the reduction of tumor cells, and in one case, NPM1 mutant alleles were detectable about 7 months before morphological relapse. CONCLUSION MEMO-quantitative PCR was shown to detect virtually all types of NPM1 mutants with high sensitivity and specificity. This novel method may be useful in the diagnosis of AML with an NPM1 mutation, the detection of minimal residual disease, and the monitoring of treatment response.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chang-Seok Ki
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jong-Won Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Song JS, Shin SY, Lee ST, Kim HJ, Kim SH. A cryptic ETV6/ABL1 rearrangement represents a unique fluorescence in situ hybridization signal pattern in a patient with B acute lymphoblastic leukemia. Ann Lab Med 2014; 34:475-7. [PMID: 25368826 PMCID: PMC4215421 DOI: 10.3343/alm.2014.34.6.475] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 05/12/2014] [Accepted: 09/19/2014] [Indexed: 11/19/2022] Open
Affiliation(s)
- Ju Sun Song
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang-Yong Shin
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Shin SY, Lee ST, Kim HJ, Jang JH, Jung CW, Kim SH. A case of CD5-positive mature B-cell neoplasm with t(10;14)(q24;q11.2) and trisomy 12. Leuk Lymphoma 2014; 56:1550-1. [PMID: 25284493 DOI: 10.3109/10428194.2014.971408] [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]
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Shin SY, Lee ST, Kim HJ, Kim SJ, Kim K, Kang ES, Kim SH. Antigen Expression Patterns of Plasma Cell Myeloma: An Association of Cytogenetic Abnormality and International Staging System (ISS) for Myeloma. J Clin Lab Anal 2014; 29:505-10. [PMID: 25277787 DOI: 10.1002/jcla.21801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Accepted: 08/07/2014] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Immunophenotyping of plasma cell has become an important diagnostic tool for plasma cell myeloma. There have been a few studies for association of antigen expression and cytogenetic abnormality of plasma cell myeloma. METHODS A total of 68 symptomatic/smoldering plasma cell myeloma case were analyzed by multicolor flow cytometry using CD38 and CD138 for primary gating of plasma cells. A conventional cytogenetics and fluorescence in situ hybridization (FISH) studies for detection of del(13q) or aneuploidy, del(17p), and IGH/FGFR translocation were done. We statistically analyzed the association of antigen expression and cytogenetic abnormality/myeloma stage (international staging system for multiple myeloma). RESULTS Positive expression of CD19, CD28, CD45, CD56, CD117, and CD274 was detected in 8.8%, 50.0%, 50.0%, 75.0%, 39.7%, and 2.9% of cases, respectively. CD117-negative cases were associated with hypodiploidy (P = 0.017). CD45-negative cases were associated with deletion 13 or aneuploidy (P < 0.001) and del(17p)(P = 0.011) by FISH. CD45-negativity or CD117-negativity was associated with advanced stage (P = 0.012 and P = 0.016, respectively). CONCLUSION The antigen expression patterns of myeloma plasma cell were associated with cytogenetic abnormality and stage.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Suk Jin Kim
- Department of Laboratory Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kihyun Kim
- Department of Laboratory Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Eun Suk Kang
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sun-Hee Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Shin SY, Kaburaki Y, Watanabe M, Munekata E. Synthesis of the Five Peptide Derivatives Needed to Build the Sequence Corresponding to 1–30 of Human Epidermal Growth Factor (h-EGF). Biosci Biotechnol Biochem 2014; 56:399-403. [PMID: 1368323 DOI: 10.1271/bbb.56.399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- S Y Shin
- Institute of Applied Biochemistry, University of Tsukuba, Japan
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Shin SY, Kaburaki Y, Watanabe M, Munekata E. Total Solution Synthesis of Human Epidermal Growth Factor (h-EGF) by the Assembly of Nine Building Blocks. Biosci Biotechnol Biochem 2014; 56:404-8. [PMID: 1368324 DOI: 10.1271/bbb.56.404] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Human epidermal growth factor (h-EGF) composed of 53 amino acids bearing three intramolecular disulfide bridges was synthesized by the maximum protecting solution method. The synthetic h-EGF coincided with recombinant h-EGF by reverse-phase HPLC, and the sites of three intramolecular disulfide bridges were ascertained by a thermolytic digestion. The synthetic h-EGF possessed m/z 6215.7 in its FAB-MS as expected, and exhibited compatible mitogenic activity.
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Affiliation(s)
- S Y Shin
- Institute of Applied Biochemistry, University of Tsukuba, Japan
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Shin SY, Kaburaki Y, Watanabe M, Munekata E. Synthesis of Four Peptide Derivatives to Build the Sequence Corresponding to 31–53 of Human Epidermal Growth Factor (h-EGF). Biosci Biotechnol Biochem 2014; 56:108-12. [PMID: 1368123 DOI: 10.1271/bbb.56.108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- S Y Shin
- Institute of Applied Biochemistry, University of Tsukuba, Japan
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Parekh R, Lorenzo MK, Shin SY, Pozzi A, Clark AL. Integrin α1β1 differentially regulates cytokine-mediated responses in chondrocytes. Osteoarthritis Cartilage 2014; 22:499-508. [PMID: 24418674 PMCID: PMC4028170 DOI: 10.1016/j.joca.2013.12.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 09/10/2013] [Revised: 12/07/2013] [Accepted: 12/25/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To elucidate the role of integrin α1β1 in chondrocyte responses to inflammatory interleukin-1α (IL-1) and anabolic transforming growth factor-β1 (TGF-β1) in the knee. METHODS Intracellular calcium transient responses to IL-1 and TGF-β1 were measured in wild type and integrin α1-null chondrocytes using real time ex vivo confocal microscopy, and immunohistochemistry was performed to analyze TGF-β1-mediated activation of Smad2/3 in tibial and femoral chondrocytes. RESULTS Loss of integrin α1β1 reduces intracellular calcium transient response to IL-1, while it enhances chondrocyte responses to TGF-β1 as measured by intracellular calcium transients and activation of downstream Smad2/3. CONCLUSIONS Integrin α1β1 plays a vital role in mediating chondrocyte responses to two contrasting factors that are critical players in the onset and progression of osteoarthritis - inflammatory IL-1 and anabolic TGF-β. Further investigation into the molecular mechanisms by which integrin α1β1 mediates these responses will be an important next step in understanding the influence of increased expression of integrin α1β1 during the early stages of osteoarthritis on disease progression.
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Affiliation(s)
- R Parekh
- Faculty of Science, The University of Calgary, Calgary, AB, Canada
| | - MK Lorenzo
- Faculty of Science, The University of Calgary, Calgary, AB, Canada
| | - SY Shin
- Faculty of Kinesiology, The University of Calgary, Calgary, AB, Canada
| | - A Pozzi
- Department of Medicine, Vanderbilt University, Nashville, TN, USA,Department of Medicine, Veterans Affairs Hospital, Nashville, TN, USA
| | - AL Clark
- Faculty of Kinesiology, The University of Calgary, Calgary, AB, Canada,Department of Surgery, Faculty of Medicine, The University of Calgary, Calgary, AB, Canada
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Shin SY, Kwon MJ, Park H, Woo HY. Comparison of chronic kidney disease prevalence examined by the chronic kidney disease epidemiology collaboration equation with that by the modification of diet in renal disease equation in Korean adult population. J Clin Lab Anal 2014; 28:320-7. [PMID: 24578261 DOI: 10.1002/jcla.21688] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Accepted: 08/21/2013] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The new estimated glomerular filtration (eGFR) equation, Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation, was recently introduced. We compared the prevalence of CKD examined by the CKD-EPI equation with that by the Modification of Diet in Renal Disease (MDRD) equation. METHODS We analyzed the data from a total of 14,605 Korean adults (age ≥20 years), who were enrolled in the Korean National Health and Nutrition Examination Survey in 2007, 2009, and 2010. CKD stages 1 and 2 were defined as eGFR ≥60 mL/min/1.73 m(2) with proteinuria measured by dipstick. CKD stages 3-5 were defined as eGFR <60 mL/min/1.73 m(2) . RESULTS The eGFRs calculated by the CKD-EPI equation were higher than those calculated by the MDRD equation (P < 0.001), especially in women and young people. The prevalence of CKD stages 3-5 calculated by the MDRD equation was 6.8%, 3.0%, and 3.0% in 2007, 2009, and 2010, respectively. The prevalence of CKD stages 3-5 calculated by CKD-EPI equation was 7.7%, 2.7%, and 2.6% in 2007, 2009, and 2010, respectively. When defining the CKD using the CKD-EPI equation, 55 (32.7%) of 350 cases were reclassified into more advanced stages and 295 cases (67.3%) were reclassified into less-advanced stages. CONCLUSION The CKD-EPI equation caused an overall low prevalence of CKD compared to the MDRD. Therefore, CKD-EPI equation might be helpful to prevent an overestimation of CKD.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Shin SY, Kwon MJ, Song J, Park H, Woo HY. Measurement of serum total vitamin D (25-OH) using automated immunoassay in comparison [corrected] with liquid chromatography tandem-mass spectrometry. J Clin Lab Anal 2014; 27:284-9. [PMID: 23852785 DOI: 10.1002/jcla.21598] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 02/04/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The associations of vitamin D deficiency with many nonskeletal diseases are still being discovered. We evaluated the use of an automated immunoassay to measure serum total vitamin D (25-OH) and assessed vitamin D status in a Korean adult population. METHODS We compared the Elecsys Vitamin D (25-OH) Total Assay (Roche Diagnostics) with liquid chromatography-tandem mass spectrometry (LC-MS/MS) using 300 serum samples. Total imprecision was calculated using three levels of quality control materials and serum samples. We also investigated the vitamin D status using data for 70,762 cases who had a routine health check-up in our hospitals. RESULTS The regression equation: Elecsys = 0.882 × LC-MS/MS + 6.814 (r = 0.926). Total imprecision was within 10% for all quality control materials and serum samples. The prevalence of vitamin D deficiency using cut-off values of <50 nmol/l (<20 ng/ml) were 70.3% in males and 86.4% in females, respectively. The prevalence of vitamin D deficiency was higher in younger subjects than in older subjects (P for linear-by-linear association was <0.001). Serum vitamin D levels were highest in September and lowest in February. CONCLUSION The Elecsys Vitamin D (25-OH) Total Assay was comparable to LC-MS/MS and appropriate for routine clinical use. Vitamin D deficiency is common in Korean adults.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
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Abstract
BACKGROUND IL22RA1 (Interleukin 22 receptor-alpha 1), a member of the class II cytokine receptor family, mediates diverse biologic activities and appears to be important in pathogen defense, wound healing, and tissue reorganization. Polymorphisms in genes encoding inflammatory cytokines are associated with increased cancer risk. AIM The aim of this study was to evaluate the association between the single nucleotide polymorphisms (SNP) in the IL22 and IL22RA1 and papillary thyroid cancer (PTC), and to assess the relationship between the SNP in the IL22 and IL22RA1 and the clinical parameters of PTC. MATERIAL AND METHODS Study enrolled experimental group of 94 PTC patients and 213 controls. PTC patients were grouped and compared for clinical PTC parameters. One promoter SNP of IL22, -429C/T (rs2227485), and one SNP of IL22RA1, Arg518Gly (rs3795299) were analyzed using direct sequencing. Genetic data were analyzed using Helixtree, SNPAnalyzer Pro, SNPStats, and Haploview. RESULTS A SNP in IL22 (rs2227485) was significantly associated with PTC (codominant2 model [C/C vs T/T], odds ratio (OR) 2.39, 95% confidence interval (CI) 1.21-4.71, p=0.012; dominant model, OR 1.89, 95% CI 1.08-3.31, p=0.022). The allele T frequency of rs2227485 in IL22 was also associated with PTC (OR 1.59, 95% CI 1.13-2.25, p=0.009). According to clinical parameters, rs2227485 of IL22 was associated with number of cancers (dominant model, OR 3.03, 95% CI 1.02-9.01, p=0.035). By haplotype analysis, TG was associated with PTC (codominant model, OR 1.52, 95% CI 1.07-2.16, p=0.019; dominant model, OR 1.91, 95% CI 1.13- 3.24, p=0.015). Genotype and allele analysis of rs3795299 in IL22RA1 showed no significant differences between PTC patients and controls. CONCLUSION The rs2227485 SNP in IL22 might be associated with the risk and the multifocality of PTC.
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Affiliation(s)
- Y G Eun
- Department of Otolaryngology-Head and Neck Surgery, Kandong Sacred Heart Hospital, Hallym University School of Medicine, 445 Gil-Dong, Kangdong-Gu, Seoul 134-701, South Korea
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Abstract
We report four cases of possible human infections with Delftia lacustris. D. lacustris isolates, which were isolated from blood cultures and bile fluid of patients with underlying diseases such as empyema, renal injury, hepatocellular carcinoma, and renal infarction, were identified using 16S rRNA gene sequencing and biochemical tests. Four D. lacustris isolates did not show the same antimicrobial susceptibility profiles and enterobacterial repetitive intergenic consensus-polymerase chain reaction (ERIC-PCR) patterns, indicating their non-clonality.
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Affiliation(s)
- S Y Shin
- Korea Medical Institute, Seoul, South Korea
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Shin SY, Jang S, Park CJ, Chi HS, Lee JH, Lee JH, Lee KH, Suh C, Lim SE, Seo EJ. Application of an immune-magnetic cell sorting method for CD138-positive plasma cells in FISH analysis of multiple myeloma. Int J Lab Hematol 2012; 34:541-6. [PMID: 22672327 DOI: 10.1111/j.1751-553x.2012.01433.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Interphase fluorescence in situ hybridization (FISH) analysis of multiple myeloma (MM) may indiscriminately count signals of nonplasma cells, thus decreasing specificity and sensitivity. We aimed to evaluate the usefulness of an immune-magnetic sorting method for plasma cells in FISH analysis of MM and define optimal sample preparation conditions. METHODS Plasma cells were purified using EasySep(®) CD138 Positive Selection Cocktail and Magnetic Nanoparticles (Invitrogen). We compared FISH results with and without plasma cell purification for three sample preparation methods: direct harvest, 24-h culture, and 96-h culture with interleukin-4 in five newly diagnosed MM patients. Archived fixed bone marrow cells of 17 MM patients were also studied. RESULTS The percentage of abnormal cells identified was significantly higher with plasma cell purification than without purification (median, 88.0%; range, 84.0-100.0%vs. 15.0%, 12.5-29.5%, respectively). The three sample preparation methods showed comparable results. Immune-magnetic sorting also significantly increased the percentage of abnormal cells identified in FISH analysis of archived fixed bone marrow cells (P < 0.001). CONCLUSIONS Immune-magnetic CD138-positive cell sorting significantly increased the percentage of abnormal cells identified in FISH analysis of MM samples for all sample preparation methods. This method could also be applied for retrospective FISH analysis of archived fixed bone marrow cells.
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Affiliation(s)
- S Y Shin
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea
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Lee SK, Lee S, Shin SY, Ryu PD, Lee SY. Single cell analysis of voltage-gated potassium channels that determines neuronal types of rat hypothalamic paraventricular nucleus neurons. Neuroscience 2012; 205:49-62. [PMID: 22245500 DOI: 10.1016/j.neuroscience.2011.12.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 11/16/2011] [Accepted: 12/19/2011] [Indexed: 10/14/2022]
Abstract
The hypothalamic paraventricular nucleus (PVN), a site for the integration of both the neuroendocrine and autonomic systems, has heterogeneous cell composition. These neurons are classified into type I and type II neurons based on their electrophysiological properties. In the present study, we investigated the molecular identification of voltage-gated K+ (Kv) channels, which determines a distinctive characteristic of type I PVN neurons, by means of single-cell reverse transcription-polymerase chain reaction (RT-PCR) along with slice patch clamp recordings. In order to determine the mRNA expression profiles, firstly, the PVN neurons of male rats were classified into type I and type II neurons, and then, single-cell RT-PCR and single-cell real-time RT-PCR analysis were performed using the identical cell. The single-cell RT-PCR analysis revealed that Kv1.2, Kv1.3, Kv1.4, Kv4.1, Kv4.2, and Kv4.3 were expressed both in type I and in type II neurons, and several Kv channels were co-expressed in a single PVN neuron. However, we found that the expression densities of Kv4.2 and Kv4.3 were significantly higher in type I neurons than in type II neurons. Taken together, several Kv channels encoding A-type K+ currents are present both in type I and in type II neurons, and among those, Kv4.2 and Kv4.3 are the major Kv subunits responsible for determining the distinct electrophysiological properties. Thus these 2 Kv subunits may play important roles in determining PVN cell types and regulating PVN neuronal excitability. This study further provides key molecular mechanisms for differentiating type I and type II PVN neurons.
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Affiliation(s)
- S K Lee
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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Abstract
Deferral of blood donors taking teratogenic drugs is critical. From March 2008 to January 2009, we analysed stored blood specimens from donors who had taken teratogenic drugs and whose blood was transfused to women of childbearing age to determine the plasma concentration at the time of donation using high-performance liquid chromatography. In total, 167 specimens were examined. The numbers of specimens exceeding the quantification limit were 7, 39, 4, 2 and 1 for finasteride, isotretinoin, acitretin, etretinate and dutasteride, respectively. Finasteride was beyond the recommended drug deferral period in one specimen. These results may help create practical deferral policies.
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Affiliation(s)
- S Y Shin
- Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Osong Health Technology Administration Complex, South Korea
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Shin SY, Yu JH, Kim JY, Kim YJ, Woo HY, Kwon MJ, Yeom JS. A Case of Mixed Malaria Infection with Severe Hemolytic Anemia after Travel to Angola. Infect Chemother 2012. [DOI: 10.3947/ic.2012.44.5.386] [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: 11/24/2022] Open
Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jung-hee Yu
- Department of Internal Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jung-Yeon Kim
- Division of Malaria and Parasitic Diseases, Korea Centers for Disease Control and Prevention, Osong, Korea
| | - Yeon-Ju Kim
- Division of Malaria and Parasitic Diseases, Korea Centers for Disease Control and Prevention, Osong, Korea
| | - Hee-Yeon Woo
- Department of Laboratory Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Min-Jung Kwon
- Department of Laboratory Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Joon-Sup Yeom
- Department of Internal Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine, Seoul, Korea
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Shin SY, Jang S, Park CJ, Chi HS, Lee KH, Huh J, Seo EJ. A rare case of Lennert's type peripheral T-cell lymphoma with t(14;19)(q11.2;q13.3). Int J Lab Hematol 2011; 34:328-32. [PMID: 22122800 DOI: 10.1111/j.1751-553x.2011.01385.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although most patients with peripheral T-cell lymphoma (PTCL) show clonal rearrangement of T-cell receptor genes, few PTCLs show recurrent chromosomal abnormalities. We describe here a rare chromosomal rearrangement, t(14;19)(q11.2;q13.3), in a Lennert's lymphoma, a variant of PTCL, not otherwise specified. Sequential fluorescence in situ hybridization assays showed that the breakpoint in 19q13.3 was located distal to the BCL3 and PVRL2 genes, both of which may be candidate proto-oncogenes. These findings suggest that another gene is involved in the pathogenic characteristics observed in this patient with Lennert's lymphoma.
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Affiliation(s)
- S Y Shin
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea
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Shin SY, Park H, Chae SW, Woo HY. Microangiopathic hemolytic anemia as the first manifestation of metastatic signet ring cell carcinoma of unknown origin: a case report and review of literature. Korean J Lab Med 2011; 31:157-61. [PMID: 21779188 PMCID: PMC3129345 DOI: 10.3343/kjlm.2011.31.3.157] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 04/04/2011] [Accepted: 04/20/2011] [Indexed: 01/27/2023] Open
Abstract
Microangiopathic hemolytic anemia (MAHA) occurs occasionally as a paraneoplastic syndrome in some solid tumors, but MAHA accompanied by signet ring cell carcinoma of an unknown origin is very rare. In this study, we present the case of an 80-yr-old man who was admitted to the hospital because of a 1-month history of lower back pain and dyspnea. He was diagnosed with MAHA on the basis of the laboratory findings that revealed anemia with schistocytes, decreased haptoglobin levels, and a negative direct Coombs' test. Bone marrow examination, which was performed because of the progression of anemia, revealed bone marrow metastases of signet ring cell carcinoma with extensive bone marrow necrosis. However, the primary origin of this signet ring cell carcinoma was not found. When the cause of progressive MAHA is unknown, the possibility of cancer-associated MAHA must be excluded by performing additional tumor workup, including the detection of tumor markers, gastric and colorectal endoscopic examinations, bone marrow examinations, and positron emission tomography-computed tomography or bone scans.
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Affiliation(s)
- Sang-Yong Shin
- Department of Laboratory Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
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Abstract
A uterus-like mass is a rare, benign extra-uterine tumour composed of smooth muscle and endometrium. The majority of uterus-like masses occur in the ovary. Rarely, uterus-like masses occur in the broad ligament, small bowel, small bowel mesentery or uterine cervix. Here, we report a case of a uterus-like mass in the sigmoid mesocolon. A well-defined, markedly enhanced soft-tissue mass with central cystic change and haemorrhage was observed on CT. The current report describes the CT characteristics of this sigmoid mesocolon uterus-like mass together with the differential diagnoses.
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Affiliation(s)
- S Y Shin
- Department of Radiology, Kyung Hee University Medical Center, Dongdaemun-gu, Seoul, Korea
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Woo HY, Shin SY, Park H, Kim YJ, Kim HJ, Lee YK, Chae SL, Chang YH, Choi JR, Han K, Cho SR, Kwon KC. [Current status and proposal of a guideline for manual slide review of automated complete blood cell count and white blood cell differential]. Korean J Lab Med 2010; 30:559-66. [PMID: 21157139 DOI: 10.3343/kjlm.2010.30.6.559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Manual slide review (MSR) is usually triggered by the results of automated hematology analyzers, but each laboratory has different criteria for MSR. This study was carried out to investigate the current status of MSR criteria of automated complete blood cell count (CBC) and white blood cell (WBC) differential results and to propose a basic guideline for MSR. METHODS Total 111 laboratories were surveyed regarding MSR using questionnaires. The questionnaire asked: kinds of automated hematology analyzers used and the presence of criteria triggering MSR in seven categories: 1) CBC results, 2) 5 differential WBC counts, 3) 3 differential WBC counts, 4) automated reticulocyte counts, 5) delta check, 6) instrument flags (or messages), 7) clinical information (wards or diseases). Based on the survey results, we determined basic and extended criteria for MSR. With these criteria, we consulted nine hematology experts to get a consensus. RESULTS All 111 laboratories had their own MSR criteria. Among 111 laboratories, 98 (88.3%) used more than three criteria for MSR including CBC results and 5-part WBC differential count results and 95 (85.6%) had criteria of flags triggering MSR. For MSR criteria with numeric values, the 10th, 50th, and 90th percentiles of upper and lower threshold values were obtained. The basic guideline for MSR was made. CONCLUSIONS We proposed a basic guideline for MSR. This guideline would be helpful to hematology laboratories for their daily operation and providing more rapid and accurate CBC and WBC differential results.
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Affiliation(s)
- Hee-Yeon Woo
- Department of Laboratory Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
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Affiliation(s)
- S Y Shin
- Endodontic Division, Atlantic Coast Dental Research Clinic, West Palm Beach, FL, USA
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Pak HN, Kim JS, Shin SY, Lee HS, Choi JI, Lim HE, Hwang C, Kim YH. Is Empirical Four Pulmonary Vein Isolation Necessary for Focally Triggered Paroxysmal Atrial Fibrillation? Comparison of Selective Pulmonary Vein Isolation Versus Empirical Four Pulmonary Vein Isolation. J Atr Fibrillation 2008; 1:99. [PMID: 28496581 PMCID: PMC4955819 DOI: 10.4022/jafib.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2008] [Revised: 07/11/2008] [Accepted: 07/14/2008] [Indexed: 06/07/2023]
Affiliation(s)
- H N Pak
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - J S Kim
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - S Y Shin
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - H S Lee
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - J I Choi
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - H E Lim
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - C Hwang
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
| | - Y H Kim
- Andrea Corrado and Antonio Raviele "Dell'Angelo" Hospital of Mestre, Venezia, Italy
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Takushima Y, Shin SY, Chung YC. Design of a LiNbO(3) ribbon waveguide for efficient difference-frequency generation of terahertz wave in the collinear configuration. Opt Express 2007; 15:14783-14792. [PMID: 19550758 DOI: 10.1364/oe.15.014783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We propose and investigate a ribbon waveguide for difference-frequency generation of terahertz (THz) wave from infrared light sources. The proposed ribbon waveguide is composed of a nonlinear optic crystal and has a thickness less than the wavelength of the THz wave to support the surface-wave mode in the THz region. By utilizing the waveguide dispersion of the surface-wave mode, the phase matching condition between infrared pump, idler and THz waves can be realized in the collinear configuration. Owing to the weak mode confinement of the THz wave, the absorption coefficient can also be reduced. We design the ribbon waveguide which uses LiNbO(3) crystal and discuss the phase-matching condition for DFG of THz wave. Highly efficient THz-wave generation is confirmed by numerical simulations.
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Karki P, Seong C, Kim JE, Hur K, Shin SY, Lee JS, Cho B, Park IS. Intracellular K(+) inhibits apoptosis by suppressing the Apaf-1 apoptosome formation and subsequent downstream pathways but not cytochrome c release. Cell Death Differ 2007; 14:2068-75. [PMID: 17885667 DOI: 10.1038/sj.cdd.4402221] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Cellular ionic homeostasis, fundamentally K(+) homeostasis, has been implicated as a critical regulator of apoptosis. The intracellular K(+) efflux on apoptotic insult and suppression of apoptosis by high concentration of extracellular K(+) or after inhibition of this efflux by K(+) channel blockers have established the crucial role of K(+) in turning on the apoptotic machinery. Several contrasting observations have reported the antiapoptotic effect of intracellular K(+) concentration to be the result of inhibition of cytochrome c release from mitochondria, but the exact inhibitory mechanism remains obscure. However, here we show the blockage of K(+) efflux during apoptosis did not affect cytochrome c release from the mitochondria, still completely inhibited the formation of the apoptosome comprising Apaf-1, cytochrome c, caspase-9 and other accessories. As a consequence of this event, procaspase-9, -3, -8 and other death-related proteins were not processed. Furthermore, physiological concentrations of K(+) also inhibited the processing of procaspase-3 by purified caspase-8 or -9, the nucleosomal DNA fragmentation by purified DFF40/CAD and the nuclear fragmentation to varying extents. Altogether, these findings suggest that the efflux of K(+) is prerequisite not only for the formation of the apoptosome but also for the downstream apoptotic signal-transduction pathways.
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Affiliation(s)
- P Karki
- Department of Bio-Materials Engineering and Cellular and Molecular Medicine, School of Medicine, Research Center for Proteineous Materials (RCPM), Chosun University, Gwangju, Korea
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Choi JY, Park YS, Kim CO, Park YS, Yoon HJ, Shin SY, Kim YA, Song YG, Yong D, Lee K, Kim JM. Mortality risk factors of Acinetobacter baumannii
bacteraemia. Intern Med J 2005; 35:599-603. [PMID: 16207259 DOI: 10.1111/j.1445-5994.2005.00925.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [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: 11/29/2022]
Abstract
BACKGROUND Acinetobacter baumannii is one of the most important nosocomial pathogens, and its multiple antibiotic resistance has emerged as an obstacle in the treatment of these infections worldwide. AIMS To identify risk factors of mortality for A. baumannii bacteraemia. METHODS A retrospective cohort study of 72 patients with significant A. baumannii bacteraemia was conducted to evaluate risk factors for mortality. RESULTS The median age of the 72 enrolled patients was 48 years, 96% of the cases were hospital-acquired, and the bacteraemia-related mortality rate was 29% (21 of 72 patients). Univariate analysis revealed that the risk factors for mortality included: an elevated acute physiology and chronic health evaluation (APACHE II) score, receipt of in vitro ineffective definitive antimicrobial therapy, in vitro A. baumannii resistance to cefoperazone/ sulbactam, neutropenia, and presentation with septic shock. Multivariate analysis reveals that the independent risk factors for mortality are neutropenia and elevated APACHE II scores. CONCLUSION Risk factors such as neutropenia and elevated APACHE II scores are found to be associated with higher mortality rates of A. baumannii bacteraemia. Further study is necessary for the determination of optimal strategies for both the prevention and treatment of these infections.
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Affiliation(s)
- J Y Choi
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
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Khan Z, Park SD, Shin SY, Bae SG, Yeon IK, Seo YJ. Management of Meloidogyne incognita on tomato by root-dip treatment in culture filtrate of the blue-green alga, Microcoleus vaginatus. Bioresour Technol 2005; 96:1338-1341. [PMID: 15792580 DOI: 10.1016/j.biortech.2004.11.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2004] [Revised: 11/05/2004] [Accepted: 11/19/2004] [Indexed: 05/24/2023]
Abstract
The nematicidal potential of culture filtrates of the blue-green alga, Microcoleus vaginatus (Cyanobacterium) was tested against Meloidogyne incognita on tomato in pots under greenhouse conditions. Prior to the transplantation of tomato seedling, roots were dipped in different concentrations (0.2%, 0.5%, 1%, 2%, 10%, 50% and 100%) of culture filtrate of M. vaginatus for 30 min. Root-dip treatment reduced the root galling and final population of M. incognita and increased vegetative growth of plants and root-mass production compared with the control. The beneficial effect of root-dip treatment increased with the increase in the concentration of culture filtrate. Root galling and final nematode populations were reduced by 65.9% and 97.5%, respectively when treated at the highest concentration.
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Affiliation(s)
- Z Khan
- Seongju Fruit-Vegetable Experiment Station, Gyongbuk Provincial ATA, 719-861, Republic of Korea.
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48
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Choi JY, Park YS, Cho CH, Park YS, Shin SY, Song YG, Yong D, Lee K, Kim JM. Synergic in-vitro activity of imipenem and sulbactam against Acinetobacter baumannii. Clin Microbiol Infect 2004; 10:1098-101. [PMID: 15606639 DOI: 10.1111/j.1469-0691.2004.00987.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interaction between sulbactam and imipenem was evaluated with four clinical isolates of Acinetobacter baumannii, including two isolates resistant to imipenem, one of which produced IMP-1 metallo-beta-lactamase. Two isolates (one of which was imipenem-resistant) were sulbactam-resistant by undefined mechanisms. MICs were determined by standard broth microdilution methods. Time-kill assays with imipenem and sulbactam, alone or in combination at 0.5 x MIC and 1 x MIC, showed a synergic effect in all four isolates of A. baumannii after incubation for 0, 4, 8 and > 24 h at 35 degrees C.
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Affiliation(s)
- J Y Choi
- Department of Internal Medicine and AIDS Research Institute, BK21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
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Abstract
OBJECTIVE To characterize the voltage-activated ion-channel currents in guinea-pig prostate smooth muscle cells (GPSMCs). MATERIALS AND METHODS GPSMCs were isolated using collagenase, and used in a whole-cell patch clamp study. RESULTS When GPSMCs were dialysed with a CsCl solution all the outward K+ currents were blocked and the step-like depolarization (holding voltage -70 mV) of the cell membrane evoked inward currents that were completely blocked by nifedipine (1 micromol/L). With KCl solution, step depolarizations showed outward K+ currents composed of fast, transient outward current (Ito) and outward currents that did not inactivate. Ito was resistant to a high concentration of tetraethylammonium (TEA, 5 mmol/L) but was blocked by 4-aminopyridine (5 mmol/L). The half-activation and half-inactivation voltages of Ito were 6 mV and -58 mV, respectively. With low Ca2+ buffer (0.1 mmol/L EGTA) in the solution, there were spontaneous transient outward currents (STOCs) at depolarized membrane voltages (0 mV). STOCs were blocked by TEA (1 mmol/L) or iberiotoxin (10 nmol/L) but were insensitive to apamin (100 nmol/L). CONCLUSION This voltage-clamp study showed that GPSMCs have l-type Ca2+ channels and more than two types of K+ channels. The voltage- and time-dependent changes of these ion channels and their interactions might be important in forming action potentials and regulating contractility.
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Affiliation(s)
- S-J Oh
- Department of Physiology, Sungkyunkwan University School of Medicine, Suwon, Korea
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Yu K, Park K, Kang SW, Shin SY, Hahm KS, Kim Y. Solution structure of a cathelicidin-derived antimicrobial peptide, CRAMP as determined by NMR spectroscopy. J Pept Res 2002; 60:1-9. [PMID: 12081622 DOI: 10.1034/j.1399-3011.2002.01968.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
CRAMP was identified from a cDNA clone derived from mouse femoral marrow cells as a member of cathelicidin-derived antimicrobial peptides. This peptide shows potent antimicrobial activity against gram-positive and gram-negative bacteria but no hemolytic activity against human erythrocytes. CRAMP was known to cause rapid permeabilization of the inner membrane of Escherichia coli. In this study, the structure of CRAMP in TFE/H2O (1 : 1, v/v) solution was determined by CD and NMR spectroscopy. CD spectra showed that CRAMP adopts a mainly alpha-helical conformation in TFE/H2O solution, DPC micelles, SDS micelles and liposomes, whereas it has a random structure in aqueous solution. The tertiary structure of CRAMP in TFE/H2O (1 : 1, v/v), as determined by NMR spectroscopy, consists of two amphipathic alpha-helices from Leu4 to Lys10 and from Gly16 to Leu33. These two helices are connected by a flexible region from Gly11 to Gly16. Previous analysis of series of fragments composed of various portion of CRAMP revealed that an 18-residue fragment with the sequence from Gly16 to Leu33 was found to retain antibacterial activity. Therefore, the amphipathic alpha-helical region from Gly16 to Leu33 of CRAMP plays important roles in spanning the lipid bilayers as well as its antibiotic activity. Based on this structure, novel antibiotic peptides having strong antibiotic activity, with no hemolytic effect will be developed.
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Affiliation(s)
- K Yu
- Department of Chemistry, Konkuk University, Seoul, Korea
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