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Nam KW, Kim CK, Yu S, Oh K, Chung JW, Oh YB, Kim GM, Jung JM, Song TJ, Kim YJ, Kim BJ, Heo SH, Park KY, Kim JM, Park JH, Choi JC, Park MS, Kim JT, Choi KH, Hwang YH, Seo WK. Corrigendum to "D-dimer to fibrinogen ratio predicts early neurological deterioration in ischemic stroke with atrial fibrillation" [Thromb. Res. 229 (2023) 219-224]. Thromb Res 2024; 233:173. [PMID: 38070220 DOI: 10.1016/j.thromres.2023.11.001] [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: 01/01/2024]
Affiliation(s)
- Ki-Woong Nam
- Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Chi Kyung Kim
- Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, South Korea.
| | - Sungwook Yu
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Kyungmi Oh
- Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Jong-Won Chung
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Young Bang Oh
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Gyeong-Moon Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Jin-Man Jung
- Department of Neurology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, South Korea
| | - Tae-Jin Song
- Department of Neurology, Ewha Womans University, School of Medicine, Seoul, South Korea
| | - Yong-Jae Kim
- Department of Neurology, the Catholic University of Korea, Seoul, South Korea
| | - Bum Joon Kim
- Department of Neurology, Asan Medical Center, Seoul, South Korea
| | - Sung Hyuk Heo
- Department of Neurology, Kyung Hee University College of Medicine, Seoul, South Korea
| | - Kwang-Yeol Park
- Department of Neurology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, South Korea
| | - Jeong-Min Kim
- Department of Neurology, Seoul National University Hospital, Seoul, South Korea
| | - Jong-Ho Park
- Department of Neurology, Myongji Hospital, Hanyang University College of medicine, Seoul, South Korea
| | - Jay Chol Choi
- Department of Neurology, Jeju National University, Jeju, South Korea
| | - Man-Seok Park
- Department of Neurology, Chonnam National University Hospital, Chonnam, South Korea
| | - Joon-Tae Kim
- Department of Neurology, Chonnam National University Hospital, Chonnam, South Korea
| | - Kang-Ho Choi
- Department of Neurology, Chonnam National University Hospital, Chonnam, South Korea
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University Hospital, Dae-gu, South Korea
| | - Woo-Keun Seo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Department of Digital Health, SHAIST, Sungkyunkwan University, Seoul, South Korea
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Park JS, Kim DH, Kim BK, Park KH, Park DH, Hwang YH, Kim CY. Effect of cholesterol variability on the incidence of cataract, dementia, and osteoporosis: A study using a common data model. Medicine (Baltimore) 2023; 102:e35548. [PMID: 37832124 PMCID: PMC10578724 DOI: 10.1097/md.0000000000035548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/15/2023] [Indexed: 10/15/2023] Open
Abstract
The effects of cholesterol variability on cataracts, dementia, and osteoporosis remain controversial. Using a common data model, we investigated the effects of variations in cholesterol levels on the development of cataracts, dementia, and osteoporosis. Patients who received statin therapy between 2011 and 2020 and those with 3 or more tests for total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and triglyceride (TG) levels were included. The patients were divided into those with a coefficient of variation (CV) of TC higher than the mean (high-CV group) and those with a lower CV of TC (low-CV group). Moreover, 1:1 propensity score matching was conducted based on demographic variables. Cataract, dementia, or osteoporosis was defined as having a diagnostic, drug, or surgical code based on the cohort definition. Of the 12,882 patients, cataracts, dementia, and osteoporosis were developed in 525 (4.1%), 198 (1.5%), and 438 (3.4%) patients, respectively. The stratified Cox proportional hazards model showed that the incidences of cataracts and osteoporosis were 1.38 and 1.45 times greater in the high-CV group than in the low-CV group, respectively. Our study revealed that TC variability is associated with developing cataracts and osteoporosis.
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Affiliation(s)
- Jong Sung Park
- Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
- Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Do-Hoon Kim
- Medical Big Data Research Center, Kyungpook National University Hospital, Daegu, Republic of Korea
- Department of Nuclear Medicine, Daejeon Eulji Medical Center, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Byong-Kyu Kim
- Division of Cardiology, Department of Internal Medicine, Dongguk University, College of Medicine, Gyeongju Hospital, Gyeongju, Republic of Korea
| | - Kyeong-Hyeon Park
- Department of Orthopedic Surgery, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Dong Ho Park
- Department of Ophthalmology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Chang-Yeon Kim
- Department of Internal Medicine, Daegu Catholic University Medical Center, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
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Nam KW, Kim CK, Yu S, Oh K, Chung JW, Bang OY, Kim GM, Jung JM, Song TJ, Kim YJ, Kim BJ, Heo SH, Park KY, Kim JM, Park JH, Choi JC, Park MS, Kim JT, Choi KH, Hwang YH, Seo WK. D-dimer to fibrinogen ratio predicts early neurological deterioration in ischemic stroke with atrial fibrillation. Thromb Res 2023; 229:219-224. [PMID: 37562164 DOI: 10.1016/j.thromres.2023.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 07/19/2023] [Accepted: 07/28/2023] [Indexed: 08/12/2023]
Abstract
INTRODUCTION The D-dimer to fibrinogen ratio (DFR) is a good indicator of clot-producing activity in thrombotic disease, but its clinical usefulness in stroke patients with nonvalvular atrial fibrillation (NVAF) has not been studied. We evaluated the association between the DFR and early neurological deterioration (END) in acute ischemic stroke (AIS) patients with NVAF. METHODS We included consecutive AIS patients with NVAF between 2013 and 2015 from the registry of a real-world prospective cohort from 11 large centers in South Korea. END was defined as an increase ≥2 in the total NIHSS score or ≥ 1 in the motor NIHSS score within the first 72 h of admission. The DFR was calculated as follows: DFR = D-dimer (mg/L)/fibrinogen (mg/dL) x 100. RESULTS A total of 1018 AIS patients with NVAF were evaluated. In multivariable logistic regression analysis, the highest DFR tertile was closely associated with END (adjusted odds ratio [aOR] = 2.14, 95 % confidence interval [CI]: 1.24-3.69). Hypertension (aOR = 1.71, 95 % CI: 1.09-2.70), initial NIHSS score (aOR = 1.05, 95 % CI: 1.02-1.07) and use of anticoagulants (aOR = 0.41, 95 % CI: 0.28-0.60) were also correlated with END. In addition to END, the DFR was correlated with discharge NIHSS and modified Rankin Scale (mRS) scores and the 3-month mRS score. CONCLUSIONS High DFR values were associated with END in AIS patients with NVAF. As the DFR is an indicator directly related to the main pathological mechanism of NVAF patients (fibrinolysis and coagulation), it may be useful in predicting their prognosis.
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Affiliation(s)
- Ki-Woong Nam
- Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Chi Kyung Kim
- Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, South Korea.
| | - Sungwook Yu
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Kyungmi Oh
- Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Jong-Won Chung
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Oh Young Bang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Gyeong-Moon Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Jin-Man Jung
- Department of Neurology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, South Korea
| | - Tae-Jin Song
- Department of Neurology, Ewha Womans University, School of Medicine, Seoul, South Korea
| | - Yong-Jae Kim
- Department of Neurology, the Catholic University of Korea, Seoul, South Korea
| | - Bum Joon Kim
- Department of Neurology, Asan Medical Center, Seoul, South Korea
| | - Sung Hyuk Heo
- Department of Neurology, Kyung Hee University College of Medicine, Seoul, South Korea
| | - Kwang-Yeol Park
- Department of Neurology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, South Korea
| | - Jeong-Min Kim
- Department of Neurology, Seoul National University Hospital, Seoul, South Korea
| | - Jong-Ho Park
- Department of Neurology, Myongji Hospital, Hanyang University College of medicine, Seoul, South Korea
| | - Jay Chol Choi
- Department of Neurology, Jeju National University, Jeju, South Korea
| | - Man-Seok Park
- Department of Neurology, Chonnam National University Hospital, Chonnam, South Korea
| | - Joon-Tae Kim
- Department of Neurology, Chonnam National University Hospital, Chonnam, South Korea
| | - Kang-Ho Choi
- Department of Neurology, Chonnam National University Hospital, Chonnam, South Korea
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University Hospital, Dae-gu, South Korea
| | - Woo-Keun Seo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Departement of Digital Health, SHAIST, Sungkyunkwan University, Seoul, South Korea
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Nam KW, Kim CK, Yu S, Oh K, Chung JW, Bang OY, Kim GM, Jung JM, Song TJ, Kim YJ, Kim BJ, Heo SH, Park KY, Kim JM, Park JH, Choi JC, Park MS, Kim JT, Choi KH, Hwang YH, Seo WK. Plasma Total Homocysteine Level Is Related to Unfavorable Outcomes in Ischemic Stroke With Atrial Fibrillation. J Am Heart Assoc 2022; 11:e022138. [PMID: 35470699 PMCID: PMC9238578 DOI: 10.1161/jaha.121.022138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Background Unlike patients with stroke caused by other mechanisms, the effect of elevated plasma total homocysteine (tHcy) on the prognosis of patients with both ischemic stroke and atrial fibrillation (AF) is unknown. This study aimed to evaluate the association between tHcy level and the functional outcome of patients with AF‐related stroke. Methods and Results We included consecutive patients with AF‐related stroke between 2013 and 2015 from the registry of a real‐world prospective cohort from 11 large centers in South Korea. A 3‐month modified Rankin Scale score ≥3 was considered an unfavorable outcome. Since tHcy is strongly affected by renal function, we performed a subgroup analysis according to the presence of renal dysfunction. A total of 910 patients with AF‐related stroke were evaluated (mean age, 73 years; male sex, 56.0%). The mean tHcy level was 11.98±8.81 μmol/L. In multivariable analysis, the tHcy level (adjusted odds ratio, 1.04; 95% CI, 1.01–1.07, per 1 μmol/L) remained significantly associated with unfavorable outcomes. In the subgroup analysis based on renal function, tHcy values above the cutoff point (≥14.60 μmol/L) showed a close association with the unfavorable outcome only in the normal renal function group (adjusted odds ratio, 3.10; 95% CI, 1.60–6.01). In patients with renal dysfunction, tHcy was not significantly associated with the prognosis of AF‐related stroke. Conclusions A higher plasma tHcy level was associated with unfavorable outcomes in patients with AF‐related stroke. This positive association may vary according to renal function but needs to be verified in further studies.
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Affiliation(s)
- Ki-Woong Nam
- Department of Neurology Seoul Metropolitan Government-Seoul National University Boramae Medical Center Seoul South Korea
| | - Chi Kyung Kim
- Department of Neurology Korea University Guro HospitalKorea University College of Medicine Seoul South Korea
| | - Sungwook Yu
- Department of Neurology Korea University Anam HospitalKorea University College of Medicine Seoul South Korea
| | - Kyungmi Oh
- Department of Neurology Korea University Guro HospitalKorea University College of Medicine Seoul South Korea
| | - Jong-Won Chung
- Department of Neurology Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea
| | - Oh Young Bang
- Department of Neurology Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea
| | - Gyeong-Moon Kim
- Department of Neurology Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea
| | - Jin-Man Jung
- Department of Neurology Korea University Ansan HospitalKorea University College of Medicine Ansan South Korea
| | - Tae-Jin Song
- Department of Neurology Ewha Womans UniversitySchool of Medicine Seoul South Korea
| | - Yong-Jae Kim
- Department of Neurology The Catholic University of Korea Seoul South Korea
| | - Bum Joon Kim
- Department of Neurology Asan Medical Center Seoul South Korea
| | - Sung Hyuk Heo
- Department of Neurology Kyung Hee University College of Medicine Seoul South Korea
| | - Kwang-Yeol Park
- Department of Neurology Chung-Ang University College of MedicineChung-Ang University Hospital Seoul South Korea
| | - Jeong-Min Kim
- Department of Neurology Seoul National University Hospital Seoul South Korea
| | - Jong-Ho Park
- Department of Neurology Myongji HospitalHanyang University College of medicine Seoul South Korea
| | - Jay Chol Choi
- Department of Neurology Jeju National University Jeju South Korea
| | - Man-Seok Park
- Department of Neurology Chonnam National University Hospital Chonnam South Korea
| | - Joon-Tae Kim
- Department of Neurology Chonnam National University Hospital Chonnam South Korea
| | - Kang-Ho Choi
- Department of Neurology Chonnam National University Hospital Chonnam South Korea
| | - Yang Ha Hwang
- Department of Neurology Kyungpook National University Hospital Dae-gu South Korea
| | - Woo-Keun Seo
- Department of Neurology Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea.,Departement of Digital Health SHAISTSungkyunkwan University Seoul South Korea
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Kim SH, Jeon ET, Yu S, Kyungmi O, Kim CK, Song TJ, Kim YJ, Heo SH, Park KY, Kim JM, Park JH, Choi JC, Park MS, Kim JT, Choi KH, Hwang YH, Kim BJ, Chung JW, Bang OY, Kim G, Seo WK, Jung JM. Interpretable machine learning for early neurological deterioration prediction in atrial fibrillation-related stroke. J Neurol Sci 2021. [DOI: 10.1016/j.jns.2021.118754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nam KW, Kim CK, Yu S, Chung JW, Bang OY, Kim GM, Jung JM, Song TJ, Kim YJ, Kim BJ, Heo SH, Park KY, Kim JM, Park JH, Choi JC, Park MS, Kim JT, Choi KH, Hwang YH, Oh K, Seo WK. Pre-Admission CHADS2 and CHA2DS2-VASc Scores on Early Neurological Worsening. Cerebrovasc Dis 2021; 50:288-295. [PMID: 33588410 DOI: 10.1159/000513396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/19/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Stroke risk scores (CHADS2 and CHA2DS2-VASc) not only predict the risk of stroke in atrial fibrillation (AF) patients, but have also been associated with prognosis after stroke. OBJECTIVE The aim of this study was to evaluate the relationship between stroke risk scores and early neurological deterioration (END) in ischemic stroke patients with AF. METHODS We included consecutive ischemic stroke patients with AF admitted between January 2013 and December 2015. CHADS2 and CHA2DS2-VASc scores were calculated using the established scoring system. END was defined as an increase ≥2 on the total National Institutes of Health Stroke Scale (NIHSS) score or ≥1 on the motor NIHSS score within the first 72 h of admission. RESULTS A total of 2,099 ischemic stroke patients with AF were included. In multivariable analysis, CHA2DS2-VASc score (adjusted odds ratio [aOR] = 1.17, 95% confidence interval [CI] = 1.04-1.31) was significantly associated with END after adjusting for confounders. Initial NIHSS score, use of anticoagulants, and intracranial atherosclerosis (ICAS) were also found to be closely associated with END, independent of the CHA2DS2-VASc score. Multivariable analysis stratified by the presence of ICAS demonstrated that both CHA2DS2-VASc (aOR = 1.20, 95% CI = 1.04-1.38) and CHADS2 scores (aOR = 1.24, 95% CI = 1.01-1.52) were closely related to END in only patients with ICAS. In patients without ICAS, neither of the risk scores were associated with END. CONCLUSIONS High CHA2DS2-VASc score was associated with END in ischemic stroke patients with AF. This close relationship is more pronounced in patients with ICAS.
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Affiliation(s)
- Ki-Woong Nam
- Department of Neurology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Chi Kyung Kim
- Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sungwook Yu
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Jong-Won Chung
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Oh Young Bang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Gyeong-Moon Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jin-Man Jung
- Department of Neurology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Republic of Korea
| | - Tae-Jin Song
- Department of Neurology, Ewha Womans University, School of Medicine, Seoul, Republic of Korea
| | - Yong-Jae Kim
- Department of Neurology, The Catholic University of Korea, Seoul, Republic of Korea
| | - Bum Joon Kim
- Department of Neurology, Kyung Hee University College of Medicine, Seoul, Republic of Korea
| | - Sung Hyuk Heo
- Department of Neurology, Kyung Hee University College of Medicine, Seoul, Republic of Korea
| | - Kwang-Yeol Park
- Department of Neurology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - Jeong-Min Kim
- Department of Neurology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - Jong-Ho Park
- Department of Neurology, Myongji Hospital, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - Jay Chol Choi
- Department of Neurology, Jeju National University, Jeju, Republic of Korea
| | - Man-Seok Park
- Department of Neurology, Chonnam National University Hospital, Chonnam, Chonnam, Republic of Korea
| | - Joon-Tae Kim
- Department of Neurology, Chonnam National University Hospital, Chonnam, Chonnam, Republic of Korea
| | - Kang-Ho Choi
- Department of Neurology, Chonnam National University Hwasun Hospital, Hwasun, Republic of Korea
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University Hospital, Dae-gu, Dae-gu, Republic of Korea
| | - Kyungmi Oh
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Woo-Keun Seo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea, .,Department of Digital Health, SHAIST, Sungkyunkwan University, Seoul, Republic of Korea,
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Hong KS, Kwon SU, Park JH, Cha JK, Jung JM, Kim YJ, Lee KB, Sohn SI, Lee YS, Rha JH, Kwon JH, Han SW, Kim BJ, Koo J, Choi JC, Sung SM, Lee SJ, Park MS, Ahn SH, Bang OY, Hwang YH, Nam HS, Park JM, Bae HJ, Kim EG, Lee KY, Oh MS. Fimasartan-Based Blood Pressure Control after Acute Cerebral Ischemia: The Fimasartan-Based Blood Pressure Control after Acute Cerebral Ischemia Study. J Clin Neurol 2021; 17:344-353. [PMID: 34184441 PMCID: PMC8242309 DOI: 10.3988/jcn.2021.17.3.344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 04/15/2021] [Accepted: 04/15/2021] [Indexed: 11/21/2022] Open
Abstract
Background and Purpose Blood pressure (BP) control is strongly recommended, but BP control rate has not been well studied in patients with stroke. We evaluated the BP control rate with fimasartan-based antihypertensive therapy initiated in patients with recent cerebral ischemia. Methods This multicenter, prospective, single-arm trial involved 27 centers in South Korea. Key inclusion criteria were recent cerebral ischemia within 90 days and high BP [systolic blood pressure (SBP) >140 mm Hg or diastolic blood pressure (DBP) >90 mm Hg]. BP lowering was initiated with fimasartan. BP management during the follow-up was at the discretion of the responsible investigators. The primary endpoint was the target BP goal achievement rate (<140/90 mm Hg) at 24 weeks. Key secondary endpoints included achieved BP and BP changes at each visit, and clinical events (ClinicalTrials.gov Identifier: NCT03231293). Results Of 1,035 patients enrolled, 1,026 were included in the safety analysis, and 951 in the efficacy analysis. Their mean age was 64.1 years, 33% were female, the median time interval from onset to enrollment was 10 days, and the baseline SBP and DBP were 162.3±16.0 and 92.2±12.4 mm Hg (mean±SD). During the study period, 55.5% of patients were maintained on fimasartan monotherapy, and 44.5% received antihypertensive therapies other than fimasartan monotherapy at at least one visit. The target BP goal achievement rate at 24-week was 67.3% (48.6% at 4-week and 61.4% at 12-week). The mean BP was 139.0/81.8±18.3/11.7, 133.8/79.2±16.4/11.0, and 132.8/78.5±15.6/10.9 mm Hg at 4-, 12-, and 24-week. The treatment-emergent adverse event rate was 5.4%, including one serious adverse event. Conclusions Fimasartan-based BP lowering achieved the target BP in two-thirds of patients at 24 weeks, and was generally well tolerated.
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Affiliation(s)
- Keun Sik Hong
- Department of Neurology, Ilsan Paik Hospital, Inje University, Goyang, Korea.
| | - Sun Uck Kwon
- Department of Neurology, Asan Medical Center, University of Ulsan, Seoul, Korea.
| | - Jong Ho Park
- Department of Neurology, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
| | - Jae Kwan Cha
- Department of Neurology, Dong-A University Hospital, Busan, Korea
| | - Jin Man Jung
- Department of Neurology, Korea University Ansan Hospital, Ansan, Korea
| | - Yong Jae Kim
- Department of Neurology, Eunpyeong St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Kyung Bok Lee
- Department of Neurology, Soonchunhyang University Hospital, Seoul, Korea
| | - Sung Il Sohn
- Department of Neurology, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Yong Seok Lee
- Department of Neurology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea
| | - Joung Ho Rha
- Department of Neurology, Inha University Hospital, Incheon, Korea
| | - Jee Hyun Kwon
- Department of Neurology, Ulsan University College of Medicine, Ulsan, Korea
| | - Sang Won Han
- Department of Neurology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Bum Joon Kim
- Department of Neurology, Asan Medical Center, University of Ulsan, Seoul, Korea
| | - Jaseong Koo
- Department of Neurology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Jay Chol Choi
- Department of Neurology, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea
| | - Sang Min Sung
- Department of Neurology, Pusan National University Hospital, Busan, Korea
| | - Soo Joo Lee
- Department of Neurology, Daejeon Eulji University Hospital, Eulji University, Daejeon, Korea
| | - Man Seok Park
- Department of Neurology, Chonnam National University Medical School & Hospital, Gwangju, Korea
| | - Seong Hwan Ahn
- Department of Neurology, Chosun University School of Medicine, Gwangju, Korea
| | - Oh Young Bang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Hyo Suk Nam
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Moo Park
- Department of Neurology, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu, Korea
| | - Hee Joon Bae
- Department of Neurology, Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Eung Gyu Kim
- Department of Neurology, Inje University Busan Paik Hospital, Busan, Korea
| | - Kyung Yul Lee
- Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Mi Sun Oh
- Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
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Kim JS, Lee KB, Park JH, Sung SM, Oh K, Kim EG, Chang DI, Hwang YH, Lee EJ, Kim WK, Ju C, Kim BS, Ryu JM. Safety and Efficacy of Otaplimastat in Patients with Acute Ischemic Stroke Requiring tPA (SAFE-TPA): A Multicenter, Randomized, Double-Blind, Placebo-Controlled Phase 2 Study. Ann Neurol 2019; 87:233-245. [PMID: 31721277 PMCID: PMC7003891 DOI: 10.1002/ana.25644] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 10/22/2019] [Accepted: 11/10/2019] [Indexed: 12/30/2022]
Abstract
Objective Otaplimastat is a neuroprotectant that inhibits matrix metalloprotease pathway, and reduces edema and intracerebral hemorrhage induced by recombinant tissue plasminogen activator (rtPA) in animal stroke models. We aimed to assess the safety and efficacy of otaplimastat in patients receiving rtPA. Methods This was a phase 2, 2‐part, multicenter trial in stroke patients (19–80 years old) receiving rtPA. Intravenous otaplimastat was administered <30 minutes after rtPA. Stage 1 was a single‐arm, open‐label safety study in 11 patients. Otaplimastat 80 mg was administered twice daily for 3 days. Stage 2 was a randomized, double‐blind, placebo‐controlled study involving 69 patients, assigned (1:1:1) to otaplimastat 40 mg, otaplimastat 80 mg, or a placebo. The primary endpoint was the occurrence of parenchymal hematoma (PH) on day 1. Secondary endpoints included serious adverse events (SAEs), mortality, and modified Rankin scale (mRS) distribution at 90 days (http://clinicaltrials.gov identifier: NCT02787278). Results No safety issues were encountered in stage 1. The incidence of PH during stage 2 was comparable: 0 of 22 with the placebo, 0 of 22 with otaplimastat 40 mg, and 1 of 21 with the 80 mg dose. No differences in SAEs (13%, 17%, 14%) or death (8.3%, 4.2%, 4.8%) were observed among the 3 groups. Three adverse events (chills, muscle rigidity, hepatotoxicity) were judged to be related to otaplimastat. Interpretation Intravenous otaplimastat adjunctive therapy in patients receiving rtPA is feasible and generally safe. The functional efficacy of otaplimastat needs to be investigated with further large trials. ANN NEUROL 2020;87:233–245
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Affiliation(s)
- Jong S Kim
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul
| | - Kyung Bok Lee
- Department of Neurology, Soonchunhyang University School of Medicine, Seoul
| | - Jong-Ho Park
- Department of Neurology, Myongji Hospital, Hanyang University College of Medicine, Goyang
| | - Sang Min Sung
- Department of Neurology, Pusan National University Hospital, Busan
| | - Kyungmi Oh
- Department of Neurology, Korea University Guro Hospital, Seoul
| | - Eung-Gyu Kim
- Department of Neurology, Inje University Busan Paik Hospital, Busan
| | - Dae-Il Chang
- Department of Neurology, Kyung Hee University Hospital, Seoul
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University School of Medicine and Hospital, Daegu
| | - Eun-Jae Lee
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul
| | - Won-Ki Kim
- Department of Neuroscience, Korea University College of Medicine, Seoul
| | - Chung Ju
- Research Headquarters, Shin Poong Pharmaceutical, Ansan, Korea
| | - Byung Su Kim
- Research Headquarters, Shin Poong Pharmaceutical, Ansan, Korea
| | - Jei-Man Ryu
- Research Headquarters, Shin Poong Pharmaceutical, Ansan, Korea
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9
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Jung JM, Kim YH, Yu S, O K, Kim CK, Song TJ, Kim YJ, Kim BJ, Heo SH, Park KY, Kim JM, Park JH, Choi JC, Park MS, Kim JT, Choi KH, Hwang YH, Chung JW, Bang OY, Kim GM, Seo WK. Long-Term Outcomes of Real-World Korean Patients with Atrial-Fibrillation-Related Stroke and Severely Decreased Ejection Fraction. J Clin Neurol 2019; 15:545-554. [PMID: 31591844 PMCID: PMC6785482 DOI: 10.3988/jcn.2019.15.4.545] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/29/2019] [Accepted: 07/29/2019] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND AND PURPOSE The clinical implications of echocardiography findings for long-term outcomes in atrial fibrillation (AF)-related stroke patients are unknown. METHODS This was a substudy of the Korean ATrial fibrillaTion EvaluatioN regisTry in Ischemic strOke patieNts (K-ATTENTION), which is a multicenter-based cohort comprising prospective stroke registries from 11 tertiary centers. Stroke survivors who underwent two-dimensional transthoracic echocardiography during hospitalization were enrolled. Echocardiography markers included the left-ventricle (LV) ejection fraction (LVEF), the left atrium diameter, and the ratio of the peak transmitral filling velocity to the mean mitral annular velocity during early diastole (E/e' ratio). LVEF was categorized into normal (≥55%), mildly decreased (>40% and <55%), and severely decreased (≤40%). The E/e' ratio associated with the LV filling pressure was categorized into normal (<8), borderline (≥8 and <15), and elevated (≥15). Kaplan-Meier and Cox regression analyses were performed for recurrent stroke, major adverse cardiac events, and all-cause death. RESULTS This study finally included 1,947 patients. Over a median follow-up of 1.65 years (interquartile range, 0.42-2.87 years), the rates of recurrent stroke, major adverse cardiac events, and all-cause death were 35.1, 10.8, and 69.6 cases per 1,000 person-years, respectively. Multivariable analyses demonstrated that severely decreased LVEF was associated with a higher risks of major adverse cardiac events [hazard ratio (HR), 3.91; 95% confidence interval (CI), 1.58-9.69] and all-cause death (HR, 1.95; 95% CI, 1.23-3.10). The multivariable fractional polynomial plot indicated that recurrent stroke might be associated with a lower LVEF. CONCLUSIONS Severe LV systolic dysfunction could be a determinant of long-term outcomes in AF-related stroke.
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Affiliation(s)
- Jin Man Jung
- Department of Neurology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
| | - Yong Hyun Kim
- Department of Cardiology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
| | - Sungwook Yu
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Kyungmi O
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Chi Kyung Kim
- Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Tae Jin Song
- Department of Neurology, Mokdong Hospital, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Yong Jae Kim
- Department of Neurology, Eunpyeong St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Bum Joon Kim
- Department of Neurology, Kyung Hee University College of Medicine, Seoul, Korea
| | - Sung Hyuk Heo
- Department of Neurology, Kyung Hee University College of Medicine, Seoul, Korea
| | - Kwang Yeol Park
- Department of Neurology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, Korea
| | - Jeong Min Kim
- Department of Neurology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, Korea
| | - Jong Ho Park
- Department of Neurology, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
| | - Jay Chol Choi
- Department of Neurology, Jeju National University, Jeju, Korea
| | - Man Seok Park
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - Joon Tae Kim
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - Kang Ho Choi
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea.,Department of Neurology, Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Yang Ha Hwang
- Department of Neurology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Jong Won Chung
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Oh Young Bang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Gyeong Moon Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Woo Keun Seo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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10
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Kang DH, Kim BM, Heo JH, Nam HS, Kim YD, Hwang YH, Kim YW, Kim DJ, Kim JW, Baek JH, Kim YS. Effects of first pass recanalization on outcomes of contact aspiration thrombectomy. J Neurointerv Surg 2019; 12:466-470. [PMID: 31563889 DOI: 10.1136/neurintsurg-2019-015221] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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: 06/24/2019] [Revised: 08/27/2019] [Accepted: 09/06/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND First pass recanalization (FPR, defined as achieving a modified Thrombolysis in Cerebral Ischemia (mTICI) grade 2c/3 with a single pass of a thrombectomy device) effect has not yet been evaluated in contact aspiration thrombectomy (CAT). We evaluated FPR effect on clinical outcomes and FPR predictors in CAT. METHODS All consecutive patients who underwent frontline CAT for anterior circulation large vessel occlusion with recanalization (mTICI 2b-3) were identified from registries at six stroke centers. The patients were dichotomized into FPR and non-FPR groups. Clinical features and outcomes were compared between the groups. Multivariate analyses were performed to determine whether FPR was independently associated with clinical outcomes and to identify predictors of FPR. RESULTS Of the 429 patients who underwent frontline CAT, recanalization was successful in 344 patients (80.2%; mean age 68.7±11.0 years; M:F ratio 179:165). The FPR group had a higher rate of good outcome (modified Rankin Scale score 0-2) than the non-FPR group. Furthermore, the good outcome rate was higher in the FPR group than in patients who achieved mTICI 2c/3 with multiple passes or rescue treatment. FPR (OR 2.587; 95% CI 1.237 to 5.413) remained independently associated with good outcomes, in addition to age, baseline National Institute Health Stroke Scale, and coronary artery disease. The use of a balloon guide catheter (OR 3.071; 95% CI 1.699 to 5.550) was the only predictor of FPR. CONCLUSIONS Patients in the FPR group had better clinical outcomes than the non-FPR group in CAT. FPR was independently associated with a good outcome. The use of a balloon guide catheter was the only predictor of FPR.
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Affiliation(s)
- Dong-Hun Kang
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,Department of Radiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Byung Moon Kim
- Department of Radiology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Ji Hoe Heo
- Department of Neurology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Hyo Suk Nam
- Department of Neurology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Young Dae Kim
- Department of Neurology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Yang Ha Hwang
- Department of Neurology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Yong-Won Kim
- Department of Neurology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Dong Joon Kim
- Department of Radiology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Joon Whi Kim
- Department of Radiology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Jang-Hyun Baek
- Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Yong-Sun Kim
- Department of Radiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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11
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Kang DH, Jung C, Yoon W, Kim SK, Baek BH, Kim JT, Park MS, Kim YW, Hwang YH, Kim YS, Kim BJ, Han MK, Bae HJ. Endovascular Thrombectomy for Acute Basilar Artery Occlusion: A Multicenter Retrospective Observational Study. J Am Heart Assoc 2018; 7:JAHA.118.009419. [PMID: 29982231 PMCID: PMC6064858 DOI: 10.1161/jaha.118.009419] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Background Despite the recent acceptance of thrombectomy as the standard of care in patients with acute anterior circulation stroke, the benefits of thrombectomy remain uncertain for patients with acute basilar artery occlusion (BAO). This study aimed to evaluate the effectiveness and safety of thrombectomy and to identify predictors of outcomes in a large cohort of patients with acute BAO. Methods and Results This study included 212 consecutive patients with acute BAO who underwent either stent‐retriever or contact aspiration thrombectomy as the first‐line approach between January 2011 and August 2017 at 3 stroke centers. Clinical and radiologic data were prospectively collected and stored in a database at each center. Multivariable ordinal logistic regression was performed to assess the association between each characteristic and 90‐day modified Rankin scale scores. Reperfusion was successful in 91.5% (194/212) of patients; 44.8% (95/212) of patients achieved 90‐day modified Rankin scale 0 to 2. The symptomatic hemorrhage rate was 1.9% (4/212) and mortality was 16% (34/212). In a multivariable ordinal regression, younger age, lower National Institute of Health stroke scale on admission, and absence of diabetes mellitus and parenchymal hematoma were significantly associated with a favorable shift in the overall distribution of 90‐day modified Rankin scale scores. Treatment outcomes were similar between patients who received stent‐retriever thrombectomy and contact aspiration thrombectomy as the first‐line technique. Conclusions Endovascular thrombectomy was effective and safe for treating patients with acute BAO. Age, the baseline National Institute of Health stroke scale, diabetes mellitus, and parenchymal hematoma were associated with better outcomes. This study showed no superiority of the stent‐retriever over the aspiration thrombectomy for treating acute BAO.
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Affiliation(s)
- Dong-Hun Kang
- Department of Neurosurgery, Kyungpook National University School of Medicine, Daegu, Korea.,Department of Radiology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Cheolkyu Jung
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Woong Yoon
- Department of Radiology, Chonnam National University Medical School, Gwangju, Korea
| | - Seul Kee Kim
- Department of Radiology, Chonnam National University Medical School, Gwangju, Korea
| | - Byung Hyun Baek
- Department of Radiology, Chonnam National University Medical School, Gwangju, Korea
| | - Joon-Tae Kim
- Department of Neurology, Chonnam National University Medical School, Gwangju, Korea
| | - Man Seok Park
- Department of Neurology, Chonnam National University Medical School, Gwangju, Korea
| | - Yong Won Kim
- Department of Neurology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Yang Ha Hwang
- Department of Neurology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Yong-Sun Kim
- Department of Radiology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Beom Joon Kim
- Department of Neurology and Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Moon-Ku Han
- Department of Neurology and Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hee-Joon Bae
- Department of Neurology and Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
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12
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Hwang YH, Kim YW, Kang DH, Kim YS, Liebeskind DS. Impact of Baseline Ischemia on Outcome in Older Patients Undergoing Endovascular Therapy for Acute Ischemic Stroke. J Clin Neurol 2017; 13:162-169. [PMID: 28271641 PMCID: PMC5392458 DOI: 10.3988/jcn.2017.13.2.162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 10/27/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND AND PURPOSE The outcome for older stroke patients who undergo endovascular revascularization remains unsatisfactory. We aimed to determine the effect of the extent of baseline ischemia on outcome according to age, testing the hypothesis that the restorative capacity for recovery is only marginal in older patients. METHODS Two hundred and thirteen patients who underwent endovascular revascularization due to occlusion in the M1 segment of the middle cerebral artery (with or without internal carotid artery occlusions) were selected for analysis. Patients were categorized into three age groups: group A (<66 years), group B (66-75 years), and group C (>75 years). Using pretreatment diffusion-weighted imaging (DWI), the Alberta Stroke Program Early CT Score (ASPECTS) and lesion volume were independently measured and analyzed in relation to a favorable outcome. RESULTS A favorable outcome was achieved in 111 of 213 patients overall: in 60 of the 94 (63.8%) patients in group A, in 36 of the 70 (51.4%) patients in group B, and in 15 of the 49 (30.6%) patients in group C (p=0.001). In older stroke patients (group C), a DWI ASPECTS ≥9 and lesion volume ≤5 mL were found to predict a favorable outcome, which was more restrictive than the cutoffs for their younger counterparts (groups A and B; DWI ASPECTS ≥8 and lesion volume ≤20 mL). CONCLUSIONS The age-adjusted pretreatment DWI lesion volume and ASPECTS may represent useful surrogate markers for functional outcome according to age. The use of more-restrictive inclusion criteria for older stroke patients could be warranted, although larger studies are necessary to confirm these findings.
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Affiliation(s)
- Yang Ha Hwang
- Cerebrovascular Center, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.,Department of Neurology, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.
| | - Yong Won Kim
- Cerebrovascular Center, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.,Department of Neurology, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.,Department of Radiology, Kyungpook National University School of Medicine and Hospital, Daegu, Korea
| | - Dong Hun Kang
- Cerebrovascular Center, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.,Department of Radiology, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.,Department of Neurosurgery, Kyungpook National University School of Medicine and Hospital, Daegu, Korea
| | - Yong Sun Kim
- Cerebrovascular Center, Kyungpook National University School of Medicine and Hospital, Daegu, Korea.,Department of Neurosurgery, Kyungpook National University School of Medicine and Hospital, Daegu, Korea
| | - David S Liebeskind
- UCLA Stroke Center, University of California, Los Angeles, Los Angeles, CA, USA
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13
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Kim SY, Kim K, Hwang YH, Park J, Jang J, Nam Y, Kang Y, Kim M, Park HJ, Lee Z, Choi J, Kim Y, Jeong S, Bae BS, Park JU. High-resolution electrohydrodynamic inkjet printing of stretchable metal oxide semiconductor transistors with high performance. Nanoscale 2016; 8:17113-17121. [PMID: 27722626 DOI: 10.1039/c6nr05577j] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
As demands for high pixel densities and wearable forms of displays increase, high-resolution printing technologies to achieve high performance transistors beyond current amorphous silicon levels and to allow low-temperature solution processability for plastic substrates have been explored as key processes in emerging flexible electronics. This study describes electrohydrodynamic inkjet (e-jet) technology for direct printing of oxide semiconductor thin film transistors (TFTs) with high resolution (minimum line width: 2 μm) and superb performance, including high mobility (∼230 cm2 V-1 s-1). Logic operations of the amplifier circuits composed of these e-jet-printed metal oxide semiconductor (MOS) TFTs demonstrate their high performance. Printed In2O TFTs with e-jet printing-assisted high-resolution S/D electrodes were prepared, and the direct printing of passivation layers on these channels enhanced their gate-bias stabilities significantly. Moreover, low process temperatures (<250 °C) enable the use of thin plastic substrates; highly flexible and stretchable TFT arrays have been demonstrated, suggesting promise for next-generation printed electronics.
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Affiliation(s)
- S-Y Kim
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - K Kim
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - Y H Hwang
- Radiation and Environmental Lab., Central Research Institute, Korea Hydro and Nuclear Power, Daejeon Metropolitan City, 34114, Republic of Korea
| | - J Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - J Jang
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - Y Nam
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon Metropolitan City, 34141, Republic of Korea.
| | - Y Kang
- School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea
| | - M Kim
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - H J Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - Z Lee
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
| | - J Choi
- School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea
| | - Y Kim
- Department of Computer Engineering, Kwangwoon University, Seoul Metropolitan City, 01897, Republic of Korea
| | - S Jeong
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon Metropolitan City, 34114, Republic of Korea
| | - B-S Bae
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon Metropolitan City, 34141, Republic of Korea.
| | - J-U Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City, 44919, Republic of Korea.
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14
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Kim YW, Hong JM, Park DG, Choi JW, Kang DH, Kim YS, Zaidat OO, Demchuk AM, Hwang YH, Lee JS. Effect of Intracranial Atherosclerotic Disease on Endovascular Treatment for Patients with Acute Vertebrobasilar Occlusion. AJNR Am J Neuroradiol 2016; 37:2072-2078. [PMID: 27313131 DOI: 10.3174/ajnr.a4844] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 04/24/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND AND PURPOSE Although intracranial atherosclerotic disease is often encountered during endovascular treatment for acute vertebrobasilar occlusions, its clinical implication is not well-known. We aimed to evaluate whether intracranial atherosclerotic disease influences the clinical outcomes following endovascular treatment of acute vertebrobasilar occlusive stroke. MATERIALS AND METHODS Fifty-one patients with acute vertebrobasilar occlusive stroke were included. The onset-to-groin puncture time was ≤12 hours, and aspiration- or stent-based thrombectomy was used as the primary treatment method. Following primary endovascular treatment, intracranial atherosclerotic disease (IAD group) was angiographically diagnosed when a fixed focal stenosis was observed at the occlusion site, whereas embolism (embolic group) was diagnosed if no stenosis was observed. Clinical and treatment variables were compared in both groups, and IAD was evaluated as a prognostic factor for clinical outcomes. RESULTS The baseline NIHSS score tended to be lower (14 versus 22, P = .097) in the IAD group (n = 19) than in the embolic group (n = 32). The procedural time was longer in the IAD group (96 versus 61 minutes, P = .002), despite similar rates of TICI 2b-3 (89.5% versus 87.5%, P = 1.000). The NIHSS score at 7 days was higher (21 versus 8, P = .060) and poor outcomes (mRS 4-6 at 3 months) were more frequent in the IAD group (73.7% versus 43.8%, P = .038). IAD (odds ratio, 5.469; 95% CI, 1.09-27.58; P = .040) was independently associated with poor outcomes. CONCLUSIONS An arterial occlusion related to IAD was associated with a longer procedural time and poorer clinical outcome. Further studies are warranted to elucidate the appropriate endovascular strategy.
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Affiliation(s)
- Y W Kim
- From the Departments of Neurology (Y.W.K., Y.H.H.).,Radiology (Y.W.K., D.-H.K., Y.S.K.)
| | - J M Hong
- Departments of Neurology (J.M.H., D.G.P., J.S.L.)
| | - D G Park
- Departments of Neurology (J.M.H., D.G.P., J.S.L.)
| | - J W Choi
- Radiology (J.W.C.), Ajou University School of Medicine and Hospital, Suwon, Republic of Korea
| | - D-H Kang
- Radiology (Y.W.K., D.-H.K., Y.S.K.).,Neurosurgery (D.-H.K.), Kyungpook National University School of Medicine and Hospital, Daegu, Republic of Korea
| | - Y S Kim
- Radiology (Y.W.K., D.-H.K., Y.S.K.)
| | - O O Zaidat
- Radiology (J.W.C.), Ajou University School of Medicine and Hospital, Suwon, Republic of Korea
| | - A M Demchuk
- Radiology (J.W.C.), Ajou University School of Medicine and Hospital, Suwon, Republic of Korea
| | - Y H Hwang
- From the Departments of Neurology (Y.W.K., Y.H.H.)
| | - J S Lee
- Departments of Neurology (J.M.H., D.G.P., J.S.L.)
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15
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Jung EY, Hwang YH, Joo ST. Muscle profiling to improve the value of retail meat cuts. Meat Sci 2016; 120:47-53. [PMID: 27134030 DOI: 10.1016/j.meatsci.2016.04.012] [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] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/07/2016] [Accepted: 04/11/2016] [Indexed: 12/25/2022]
Abstract
Nutrition and meat quality are always important to consumers, but vary by individual muscle or muscle groups in retail meat cuts. Muscle profiling of nutrient content and palatability for all retail beef cuts is necessary to suggest healthy and tasty beef cuts and to inform consumers of the benefits of beef consumption. The current paper reviews numerous studies that provide muscle profiles for nutrients and palatability attributes of muscles or muscle groups in retail beef cuts. The composition of nutrients including protein, fat, moisture, vitamins, and minerals in beef cuts is documented as well as the nutritive role as a part of a healthy diet. In addition, this review presents knowledge in relation to innovative carcass fabrication and value-added cuts to improve the value of beef carcass. Finally, the current work emphasize the palatability assessment of individual beef muscles, and concludes that all retail beef cuts should be merchandised for proper cooking according to the palatability profiles of beef muscles.
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Affiliation(s)
- E Y Jung
- Division of Applied Life Science (BK21 Program), Gyeongsang National University, Jinju 52828, South Korea
| | - Y H Hwang
- Meat Science Laboratory, Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, South Korea
| | - S T Joo
- Division of Applied Life Science (BK21 Program), Gyeongsang National University, Jinju 52828, South Korea; Meat Science Laboratory, Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, South Korea.
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Kim HJ, Alam Z, Hwang JW, Hwang YH, Kim MJ, Yoon S, Byun Y, Lee DY. Optimal formation of genetically modified and functional pancreatic islet spheroids by using hanging-drop strategy. Transplant Proc 2013; 45:605-10. [PMID: 23498797 DOI: 10.1016/j.transproceed.2012.11.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Revised: 05/26/2012] [Accepted: 11/11/2012] [Indexed: 11/17/2022]
Abstract
BACKGROUND Rejection and hypoxia are important factors causing islet loss at an early stage after pancreatic islet transplantation. Recently, islets have been dissociated into single cells for reaggregation into so-called islet spheroids. Herein, we used a hanging-drop strategy to form islet spheroids to achieve functional equivalence to intact islets. METHODS To obtain single islet cells, we dissociated islets with trypsin-EDTA digestion for 10 minutes. To obtain spheroids, we dropped various numbers of single cells (125, 250, or 500 cells/30 μL drop) onto a Petri dish, that was inverted for incubation in humidified air containing 5% CO(2) at 37 °C for 7 days. The aggregated spheroids in the droplets were harvested for further culture. RESULTS The size of the aggregated islet spheroids depended on the number of single cells (125-500 cells/30 μL droplet). Their morphology was similar to that of intact islets without any cellular damage. When treated with various concentrations of glucose to evaluate responsiveness, their glucose-mediated stimulation index value was similar to that of intact islets, an observation that was attributed to strong cell-to-cell interactions in islet spheroids. However, islet spheroids aggregated in general culture dishes showed abnormal glucose responsiveness owing to weak cell-to-cell interactions. Cell-to-cell interactions in islet spheroids were confirmed with an anti-connexin-36 monoclonal antibody. Finally, nonviral poly(ethylene imine)-mediated interleukin-10 cytokine gene delivered beforehand into dissociated single cells before formation of islet spheroids increased the gene transfection efficacy and interleukin-10 secretion from islet spheroids >4-fold compared with intact islets. CONCLUSION These results demonstrated the potential application of genetically modified, functional islet spheroids with of controlled size and morphology using an hanging-drop technique.
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Affiliation(s)
- H J Kim
- Department of Bioengineering, College of Engineering, and Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul, Republic of Korea
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Lee PS, Han Q, Yang HY, Lee SH, Hwang YH, Han SH, Kim TW. Effect of thermal annealing on the efficiency of heterojunction photovoltaic cells fabricated using poly(3-hexylthiophene) and methanofullerene, [6,6]-phenyl C61-butyric acid methyl ester. J Nanosci Nanotechnol 2012; 12:5577-5581. [PMID: 22966613 DOI: 10.1166/jnn.2012.6247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The effects of thermal annealing on the efficiency of heterojunction photovoltaic (PV) cells that were fabricated using poly(3-hexylthiophene) (P3HT) and methanofullerene, [6,6]-phenyl C61-butyric acid methyl ester (PCBM) were investigated. The absorption spectra showed that the absorption intensity of the P3HT:PCBM layer that was annealed for 5 min had the highest value among the several samples with different annealing temperatures. The atomic force microscopy image showed that the P3HT:PCBM layer that was annealed for 5 min had the best surface morphology. The X-ray photoelectron spectroscopy demonstrated that the P3HT:PCBM layer that was annealed at 140 degrees C for 10 min enhanced the PCBM aggregation on the surface Al layer that was covered by the P3HT:PCBM layer. The efficiencies of the PV cells that were annealed at 3, 5, and 10 min were approximately 2.7, 4.2, and 3.5%, respectively. Based on the experiment results, the variations in the efficiency of the PV cells due their thermal treatment were described.
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Affiliation(s)
- P S Lee
- Department of Electronics and Computer Engineering, Hanyang University, Seoul 133-791, Korea
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Tsai HY, Liu HL, Hwang YH, Chen CC, Wan YL. SU-E-I-94: Survey of CT Image Quality and Patient Doses in Taiwan. Med Phys 2011. [DOI: 10.1118/1.3611668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Hwang YH, Song IB, Lee HK, Kim TW, Kim MS, Lim JH, Park BK, Yun HI. Pharmacokinetics and bioavailability of cefquinome in rabbits following intravenous and intramuscular administration. J Vet Pharmacol Ther 2011; 34:618-20. [PMID: 21615754 DOI: 10.1111/j.1365-2885.2011.01289.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Y H Hwang
- Research Institute of Veterinary Science, Chungnam National University, Daejeon, South Korea
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20
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Abstract
The feasibility of a membrane contactor system for ammonia removal was studied. The mass transfer coefficient was used to quantitatively compare the effect of various operation conditions on ammonia removal efficiency. Effective removal of ammonia was possible with a Polytetrafluoroethylene (PTFE) membrane contactor system at all tested conditions. Among the various operation parameters, contact time and solution pH showed significant effect on the ammonia removal mechanism. The overall ammonia removal rate was not affected by influent suspended solution concentration unlike other pressure driven membrane filtration processes. Also the osmotic distillation phenomena which deteriorate the mass transfer efficiency can be minimized by preheating of influent wastewater. A membrane contactor system can be a possible alternative to treat high strength nitrogen wastewater by optimizing operation conditions such as stripping solution flow rate, influent wastewater temperature, and influent pH.
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Affiliation(s)
- Y T Ahn
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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Hwang YH, Kim DG, Ahn YT, Moon CM, Shin HS. Fate of nitrogen species in nitrate reduction by nanoscale zero valent iron and characterization of the reaction kinetics. Water Sci Technol 2010; 61:705-712. [PMID: 20150707 DOI: 10.2166/wst.2010.895] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This study investigates the fate of nitrogen species during nitrate reduction by nanoscale zero valent iron (NZVI) as well as the related kinetics. The NZVI used for the experiments was prepared by chemical reduction without a stabilizing agent. The pseudo first order kinetic constant of nitrate reduction at 30 degrees C with an NZVI/nitrate ratio of 1.25:1, which were the reference conditions of this study, was 4.08 h(-1) (R(2)=0.955). A nitrogen mass balance was established by quantitative analysis of aqueous-phase and gas-phase nitrogen species. The results confirm that the nitrate was converted to ammonium ion, that ammonia stripping subsequently occurred under a strong alkaline condition, and that the total amount of aqueous nitrogen was consequently reduced. The nitrate reduction rate also increased with a lower pH and a higher temperature when microscale ZVI was used. However, in contrast to the reaction by microscale ZVI, the nitrate reduction rate by NZVI was higher for an unbuffered condition, possibly due to the abundance of surface atoms and the smaller size.
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Affiliation(s)
- Y H Hwang
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 305-701, South Korea.
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22
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Affiliation(s)
- H S Yang
- Division of Applied Life Science, Graduate School, Gyeongsang National University, Jinju, Gyeongnam 660-701, Korea
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Abstract
Discoloration characteristics of 3 major muscles (LD, Longissimus dorsi; PM, Psoas major; SM, Semimemebranosus) from Korean native cattle (Hanwoo) were monitored during 7 d of cold storage at 4 degrees C. The muscles were obtained from 12 Hanwoo carcasses at 24 h postmortem. Meat color (CIE L*, a*, b*), myoglobin (Mb) concentration, chemical form, metmyoglobin (MetMb) reducing ability (MRA), mitochondria concentration, and thiobarbituric acid reactive substance (TBARS) were measured at 1, 3, 5, and 7 d of storage. Although there were no significant differences in CIE a* and b*-values between the 3 muscles at day 1, the values of PM muscle were significantly (P < 0.05) lower than those of LD and SM muscles at day 5 and 7. PM muscle showed a rapid decrease in the oxymyoglobin (OxyMb) and an increase in MetMb, which resulted in a significantly (P < 0.05) higher percentage of MetMb in PM muscle compared to LD and SM muscles. Also, the Mb and mitochondria concentration of PM muscle was significantly (P < 0.05) higher than those of LD and SM muscles. However, there were no significant differences in MRA, pH, or TBARS between the 3 muscles during 7 d of cold storage. It was concluded that rapid discoloration (that is, MetMb accumulation) in PM muscle of Hanwoo could be due to its higher contents of Mb and mitochondria.
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Affiliation(s)
- J Y Jeong
- Gyeongsang Natl. Univ., Jinju, Korea
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Ali MS, Yang HS, Jeong JY, Moon SH, Hwang YH, Park GB, Joo ST. Effect of chilling temperature of carcass on breast meat quality of duck. Poult Sci 2008; 87:1860-7. [PMID: 18753455 DOI: 10.3382/ps.2007-00194] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
An experiment was carried out to investigate whether variations in chill water temperature affect muscle shortening and meat quality in duck breast. Three chill water temperatures were applied to duck carcasses at 20 min postmortem for 30 min, including in ice water at 0 degrees C, in cold water at 10 degrees C, and in water at 20 degrees C. Results revealed that carcass temperatures were different (P < 0.05) at 50 and 120 min of postmortem with lower temperatures at the 0 degrees C treatment (P < 0.05). The pH over the first 24 h postmortem was not different (P > 0.05) among treatments, with the exception of 50 min postmortem. The pH of breast meat in the 0 degrees C treatment was higher (P < 0.05) than that of 20 degrees C treatment at 50 min postmortem (just after chilling). No other differences (P > 0.05) in pH existed among treatments. Drip loss, cooking loss, and moisture content were not different for breast meat samples that were chilled at different temperatures. Differences (P < 0.05) were found in CIE (L, a, and b) color values. Lightness (L) increased, whereas redness (a) decreased as the chill water temperature increased. Lower yellowness (b) was found in the breast meat samples at the 10 degrees C chill water temperature. However, shear force, sarcomere length, and protein solubility were not different (P > 0.05) among the breast meat samples chilled at different chill water temperatures. It may be concluded that chilling duck carcasses at different temperature ranges from 0 to 20 degrees C did not influence muscle shortening or meat quality, except in regard to breast meat color.
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Affiliation(s)
- M S Ali
- Division of Applied Life Science, Gyeongsang National University, Jinju, Gyeongnam, Korea
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Abstract
BACKGROUND Attempts to identify predictors of atopic dermatitis (AD) have focused on genetic and immunologic factors. However, the role of neuro-mediators remains to be elucidated. OBJECTIVE To evaluate nerve growth factor (NGF) and vaso-active intestinal peptide (VIP) in predicting paediatric AD and assess their correlation with intrinsic and extrinsic types of AD. METHODS We performed a nested case-control study in the prospective Taiwan birth panel cohort study. Cord and maternal plasma and questionnaires were gathered at birth. During follow-up, we identified 40 available AD cases, which were matched to 80 unaffected controls chosen from this cohort. The concentrations of IgE, NGF, and VIP in cord and maternal plasma of these subjects were performed by ELISA. Receiver-operating characteristic (ROC) curves were generated to see how well each biomarker could predict AD. RESULTS The NGF levels were significantly higher in AD patients than controls (mean+/-SD: 65.47+/-44.45 vs. 49.21+/-12.18 pg/mL for cord plasma and 89.68+/-41.04 vs. 66.96+/-23.05 pg/mL for maternal plasma) (P<0.05). VIP levels were also higher but not statistically significant. Plasma NGF may be a better biomarker than IgE in detecting paediatric AD (area under the ROC curve=0.65 vs. 0.61 for cord plasma and 0.69 vs. 0.61 for maternal plasma). Maternal NGF levels were significantly higher in patients with both intrinsic (96.18+/-48.15 pg/mL) and extrinsic (86.18+/-37.23 pg/mL) types of AD compared with controls (66.96+/-23.05 pg/mL) (P<0.05). We assessed a significant correlation between self-reported stress during pregnancy and maternal NGF levels (r=0.22, P=0.02). CONCLUSION Our results suggest that NGF is a good alternative biomarker in predicting children with a risk of AD.
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Affiliation(s)
- I J Wang
- Department of Pediatrics, Taipei Hospital, National Taiwan University College of Public Health, Taipei, Taiwan
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Park J, Hwang YH, Baik SK, Kim YS, Park SH, Hamm IS. Angiographic examination of spontaneous putaminal hemorrhage. Cerebrovasc Dis 2007; 24:434-8. [PMID: 17878724 DOI: 10.1159/000108433] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Accepted: 05/22/2007] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND This study was carried out to examine indications for angiographic evaluation in the case of spontaneous putaminal hemorrhage. METHODS Angiographic examinations were performed on 62 consecutive adults with spontaneous putaminal hemorrhage without remarkable subarachnoid hemorrhage. Most patients were evaluated using conventional catheter angiography except for hypertensive patients over the age of 60 who underwent a magnetic resonance angiogram or a computed tomography angiogram. Computed tomography and clinical factors such as age and hypertension were correlated with the angiographic findings. RESULTS Nine of the 62 patients (15%) exhibited angiographic abnormalities, including middle cerebral artery aneurysm (n = 1), arteriovenous malformations (n = 3), moyamoya disease (n = 2), and the moyamoya phenomenon associated with a proximal middle cerebral artery occlusion (n = 3). The angiographic yield was significantly higher (1) among patients at or below the median age of 55 compared with those above (9/33, 27%, versus 0/29, 0%; p < 0.01), and (2) among patients without hypertension compared with those with hypertension (5/9, 56%, versus 4/53, 8%; p < 0.01). CONCLUSIONS Although our data could be biased due to the patient selection procedure, they suggest that angiographic evaluation is highly useful for spontaneous putaminal hemorrhage regardless of volume and shape of the hematomas, excepting hypertensive patients over 55 years of age.
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Affiliation(s)
- J Park
- Department of Neurosurgery, Kyungpook National University, Daegu, South Korea.
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Chung W, Kim H, Hwang YH, Kim SY, Ko AR, Ro H, Lee KB, Lee JS, Oh KH, Ahn C. PKD2 gene mutation analysis in Korean autosomal dominant polycystic kidney disease patients using two-dimensional gene scanning. Clin Genet 2007; 70:502-8. [PMID: 17100995 DOI: 10.1111/j.1399-0004.2006.00721.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is genetically heterogeneous and is caused by mutations in the PKD1 or PKD2 genes. ADPKD caused by PKD2 mutations is characterized by a longer survival and a later onset of end-stage renal disease than ADPKD caused by PKD1 mutations. PKD2 encodes a 2.9-kb messenger RNA and is derived from 15 exons. Two-dimensional gene scanning (TDGS) is more efficient in detecting mutations in genes such as PKD2 because it can scan the whole coding regions simultaneously. In order to determine the prevalence of Korean PKD2 patients, all the coding sequences of PKD2 were screened using TDGS and direct sequencing in 46 randomly selected ADPKD patients (group 1). Another 45 ADPKD patients (group 2), who were presumed to be PKD2 patients, were screened in order to identify the type of mutation in the Korean PKD2 patients. Eight novel different mutations and three known mutations in the PKD2 gene were detected in 17 patients: 6 patients (13.0%) in group 1 and 11 patients (24.4%) in group 2. Considering the sensitivity of TDGS, the prevalence of PKD2 in Korean population might be greater than 18.6%. Both known and novel mutations were identified by TDGS in Korean PKD2 patients. Overall, these results showed that TDGS might be useful for diagnosing PKD2.
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Affiliation(s)
- W Chung
- Department of Internal Medicine, Gil Medical Center, Gachon University, Incheon, Korea
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28
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Jung KC, Park CH, Hwang YH, Rhee HS, Lee JH, Kim HK, Yang CH. Fatty acids, inhibitors for the DNA binding of c-Myc/Max dimer, suppress proliferation and induce apoptosis of differentiated HL-60 human leukemia cell. Leukemia 2006; 20:122-7. [PMID: 16281068 DOI: 10.1038/sj.leu.2404022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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]
Abstract
c-Myc is instrumental in the progression of Burkitt's lymphoma including HL-60 human leukemia cells. We tested fatty acids for their inhibitory effect on the DNA binding of c-Myc/Max dimeric proteins of human origin, prepared as recombinant proteins encompassing DNA binding (basic) and dimerization (HLHZip) domain, and found that those suppress proliferation and induce apoptosis of DMSO-differentiated HL-60 cells. The analyzed IC50 values of myristic acid, stearic acid, gamma-linolenic acid, linoleic acid, linolenic acid and arachidonic acid by EMSA were 97(+/-3), 2.2(+/-1.2), 55(+/-5), 32(+/-2), 62(+/-12), 22(+/-2)microM for DNA binding of recombinant c-Myc/Max, respectively. According to the results shown by XTT assay, their influence on proliferation was quite different from the rank order of IC50. Whereas the degree of influence of the unsaturated fatty acids on the proliferation of DMSO-differentiated HL-60 cells was similar, the influence of saturated fatty acids, stearic acid in particular, was very weak at same concentrations. In addition, we confirmed that these fatty acids have no influence on the expression of c-Myc in DMSO-differentiated HL-60 cells. Our experiments demonstrated that the inhibitors for the DNA binding of c-Myc/Max contribute to the downregulation of Myc-dependent proliferation and to the inducement of apoptosis, and serve as an exploration of potent new inhibitors.
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Affiliation(s)
- K C Jung
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
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Hwang YH, Person B, Choi JS, Nam YS, Singh JJ, Weiss EG, Nogueras JJ, Wexner SD. Biofeedback therapy for rectal intussusception. Tech Coloproctol 2006; 10:11-5; discussion 15-6. [PMID: 16528489 DOI: 10.1007/s10151-006-0244-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2005] [Accepted: 08/24/2005] [Indexed: 12/24/2022]
Abstract
BACKGROUND Surgery for isolated internal rectal intussusception is controversial due to high morbidity. Therefore, there is interest in other forms of treatment that are safe and effective. The aim of this study was to determine outcome and identify predictors for success of biofeedback therapy in patients with rectal intussusception. METHODS We retrospectively evaluated the results of electromyography (EMG)-based biofeedback in 34 patients with rectal intussusception without any other major pelvic floor or colonic physiologic disorder. RESULTS A total of 34 patients (7 men) had undergone at least 2 biofeedback sessions. The patients had a mean age of 68.5 years (SD=11.4 years). In the 27 patients with constipation, the frequency of weekly spontaneous bowel movements (mean+/-SD) was 2.0+/-6.8 before and 4.1+/-4.6 after biofeedback (p<0.05). The frequency of weekly assisted bowel movements decreased from 3.8+/-3.5 before to 1.5+/-2.2 after therapy (p<0.005). The number of patients who experienced incomplete evacuation decreased from 17 (63%) to 9 (33%) (p<0.05). Thirty-three percent of patients had complete resolution of the symptoms, 19% had partial improvement, and 48% had no improvement. Patients with constipation lasting less than nine years had a 78% success rate vs. 13% in patients who were constipated more than 9 years (p<0.01). In seven patients with incontinence, the frequency of daily incontinence episodes decreased from 1.0+/-0.7 before to 0.07+/-0.06 after biofeedback (p<0.05). The fecal incontinence score decreased from 13.1+/-4.2 before to 4.6+/-3.6 after treatment (p<0.005). Two patients (29%) were completely continent following biofeedback, 2 had partial improvement, and 3 (43%) had no significant improvement. There was no mortality in either group. CONCLUSIONS Biofeedback is a safe and effective treatment option for constipation and fecal incontinence due to rectal intussusception in patients who are willing to complete the course of treatment. Long-standing constipation is less effectively cured by biofeedback.
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Affiliation(s)
- Y H Hwang
- Department of Colorectal Surgery, Cleveland Clinic Florida, 2950 Cleveland Clinic Blvd., Weston, FL 33331, USA
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Abstract
From May to July 2001, 3013 Chinese children, aged 3-6 years old, from 19 kindergartens in Kaohsiung were examined for the prevalence of otitis media. A senior paediatric otolaryngologist performed examinations. Tympanometric and otoscopic records were combined for assessment of middle ear status. The prevalence rate of otitis media was 9.82% for all children, 5.24% for middle ear effusion and 5.34% for retracted tympanic membrane. The prevalence rates of otitis media in different age groups were as follows: 11.3% for 3-year-olds, 12.4% for 4-year-olds, 11.8% for 5-year-olds, and 6.1% for 6-year-olds. Considering the genetic factors and the previous history of otitis media, there was a significant difference between the normal group and the sick group.
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Affiliation(s)
- C H Chen
- Department of Otorhinolaryngology, Kaohsiung Municipal United Hospital, Kaohsiung, Taiwan. judith
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Abstract
In a patient receiving 5-fluorouracil and levamisole, neurologic deficits suggest the cerebral demyelinating syndrome as a differential diagnosis. The authors report a patient diagnosed as multifocal inflammatory leukoencephalopathy for which thallium-201 (201Tl) single photon emission computed tomography (SPECT) and proton magnetic resonance spectroscopy (MRS) were employed as noninvasive diagnostic tools. 201Tl SPECT study was negative and proton MRS showed an increase of choline and lactate and well preserved N-acetylaspartate. These findings support histopathologic findings of multifocal inflammatory leukoencephalopathy revealing demyelination with relative axonal sparing in the patient.
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Affiliation(s)
- Yang Ha Hwang
- Department of Neurology, School of Medicine, Kyungpook National University, Daegu, Korea
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Lee JG, Ahn C, Yoon SC, Park JH, Eo HS, No JJ, Kim KH, Lee EJ, Hwang YH, Hwang DY, Kim YS, Han JS, Kim S, Lee JS, Kim SH. No association of the TGF-beta1 gene polymorphisms with the renal progression in autosomal dominant polycystic kidney disease (ADPKD) patients. Clin Nephrol 2003; 59:10-6. [PMID: 12572925 DOI: 10.5414/cnp59010] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Two genetic loci, PKD I and PKD2, have been identified as being responsible for ADPKD, and PKD1 is known to be associated with a poor prognosis. However, the presence of an intrafamilial study clinical diversity suggests that there are disease-modifying loci. Because the mechanism ofthe renal failure in ADPKD includes a cystic growth and tubulointerstitial atrophy and fibrosis, we studied the associations between 2 polymorphisms in the TGF-beta1 gene, which are known to be associated with chronic tubulointerstitial inflammation, and ADPKD progression in Korean patients. PATIENTS AND METHODS One hundred and twenty-five individuals who had ADPKD and 47 normal control subjects were genotyped by PCR-RFLP, the T869C (Leu10Pro) variant of TGF-beta gene leader sequence was discriminated with MspA1I and the G915C (Arg25Pro) variants with Bg1I. Statistical significances were determined using the Chi-square test. RESULTS The distribution of the alleles for the TGF beta1 Leu10Pro polymorphism in ADPKD was: T 54%, C 46%, which was similar to the Korean (56: 44, p = 0.887) and Western controls (65: 35). In addition, no differences were found between the ESRD and the non-ESRD groups (p = 0.888) or the early hypertension and the normotension groups (p = 0.249). The distribution of alleles for the TGF beta1 Arg25Pro polymorphism showed only the GG type which was different from the Western population controls (G:C = 90:10, p = 0.000). CONCLUSIONS Our results suggest that the polymorphism at Arg25Pro of TGF-beta1 in the Korean population has an allele distribution different from that ofthe Western population and that the polymorphism at Leu10Pro of TGF-beta1 has no association with the renal progression in Korean ADPKD patients.
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Affiliation(s)
- J G Lee
- Department of Internal Medicine, Eulji Medical College, College of Medicine, Seoul National University, Seoul, Korea
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Eo HS, Lee JG, Ahn C, Cho JT, Hwang DY, Hwang YH, Lee EJ, Kim YS, Han JS, Kim S, Lee JS, Jeoung DI, Lee SE, Kim UK. Three novel mutations of the PKD1 gene in Korean patients with autosomal dominant polycystic kidney disease. Clin Genet 2002; 62:169-74. [PMID: 12220456 DOI: 10.1034/j.1399-0004.2002.620211.x] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Mutations at the PKD1 locus account for 85% of cases of the common genetic disorder called autosomal dominant polycystic kidney disease (ADPKD). Screening for mutations of the PKD1 gene is complicated by the genomic structure of the 5'-duplicated region encoding 75% of the gene. To date, more than 90 mutations of the PKD1 gene have been reported in the European and American populations, and relatively little information is available concerning the pattern of mutations present in the Asian populations. We looked for mutations of the PKD1 gene in 51 unrelated Korean ADPKD patients, using polymerase chain reaction (PCR) with primer pairs located in the 3' single-copy region of the PKD1 gene and by single-strand conformation polymorphism (SSCP) analysis. We found three novel mutations, a G to A substitution at nucleotide 11012 (G3601S), a C to A substitution at nucleotide 11312 (Q3701X), and a C to T substitution at nucleotide 12971 (P4254S), and a single polymorphism involving a G to C substitution at nucleotide 11470 (L3753L). These mutations were not found in control individuals, and no other mutations in the 3' single-copy region of the PKD1 gene of patients with these mutations were observed. In particular, P4254S segregated with the disease phenotype. The clinical data of affected individuals from this study, and of previously reported Korean PKD1 mutations, showed that patients with frameshift or nonsense mutations were more prone to develop end-stage renal failure than those with missense mutations. Our findings indicate that many different PKD1 mutations are likely to be responsible for ADPKD in the Korean population, as in the Western population.
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Affiliation(s)
- H-S Eo
- Department of Internal Medicine, College of Medicine, Seoul National University, Seoul, Korea
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Lee W, Hwang YH, Lee SK, Subramanian C, Robertson ES. An Epstein-Barr virus isolated from a lymphoblastoid cell line has a 16-kilobase-pair deletion which includes gp350 and the Epstein-Barr virus nuclear antigen 3A. J Virol 2001; 75:8556-68. [PMID: 11507201 PMCID: PMC115101 DOI: 10.1128/jvi.75.18.8556-8568.2001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Epstein-Barr virus (EBV) is associated with human cancers, including nasopharyngeal carcinoma, Burkitt's lymphoma, gastric carcinoma and, somewhat controversially, breast carcinoma. EBV infects and efficiently transforms human primary B lymphocytes in vitro. A number of EBV-encoded genes are critical for EBV-mediated transformation of human B lymphocytes. In this study we show that an EBV-infected lymphoblastoid cell line obtained from the spontaneous outgrowth of B cells from a leukemia patient contains a deletion, which involves a region of approximately 16 kbp. This deletion encodes major EBV genes involved in both infection and transformation of human primary B lymphocytes and includes the glycoprotein gp350, the entire open reading frame of EBNA3A, and the amino-terminal region of EBNA3B. A fusion protein created by this deletion, which lies between the BMRF1 early antigen and the EBNA3B latent antigen, is truncated immediately downstream of the junction 21 amino acids into the region of the EBNA3B sequence, which is out of frame with respect to the EBNA3B protein sequence, and indicates that EBNA3B is not expressed. The fusion is from EBV coordinate 80299 within the BMRF1 sequence to coordinate 90998 in the EBNA3B sequence. Additionally, we have shown that there is no detectable induction in viral replication observed when SNU-265 is treated with phorbol esters, and no transformants were detected when supernatant is used to infect primary B lymphocytes after 8 weeks in culture. Therefore, we have identified an EBV genome with a major deletion in critical genes involved in mediating EBV infection and the transformation of human primary B lymphocytes that is incompetent for replication of this naturally occurring EBV isolate.
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Affiliation(s)
- W Lee
- Department of Biological Sciences, Myongji University, Yongin Kyunggi-do, Korea
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Lee JG, Lee KB, Kim UK, Ahn C, Hwang DY, Hwang YH, Eo HS, Lee EJ, Kim YS, Han JS, Kim S, Lee JS. Genetic heterogeneity in Korean families with autosomal-dominant polycystic kidney disease (ADPKD): the first Asian report. Clin Genet 2001; 60:138-44. [PMID: 11553048 DOI: 10.1034/j.1399-0004.2001.600208.x] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary renal disease in adults, and the prevalence of this disease within the chronic haemodialysis patient population is known to be approximately 2% in Korea. So far, three genetic locus have been identified as being responsible for ADPKD, and approximately 85% of the cases in Western countries are related to the PKD1 gene. However, little information is available concerning the pattern of linkage analysis in Asian populations. METHODS 48 families with hereditary renal cysts were recruited by consent and their molecular genetic characteristics were studied. Linkage analysis was done with microsatellite markers (PKD1: SM7, UT581, AC2.5, KG8, D16S418; PKD2: D4S423, D4S1534, D4S1542, D4S1544, D4S2460). Genomic DNA polymerase chain reaction (PCR) and polyacrylamide gel electrophoresis (PAGE) gel run were performed, and the resultant allele patterns were compared with sonographic findings. RESULTS The results of this study showed that the ratio PKD1:PKD2 was 31:8, and that the PKD2 families exhibited a tendency toward a milder renal prognosis than the PKD1 families. CONCLUSION We confirmed the applicability of linkage analysis for ADPKD in the Korean population, and our data confirmed a similar incidence of PKD1 (79%) and PKD2 (21%) in Korean patients as in the Western population.
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Affiliation(s)
- J G Lee
- Department of Internal Medicine, Eulji Medical College, Seoul, Korea
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Abstract
OBJECTIVES Rectoanal intussusception is the funnel-shaped infolding of the rectum, which occurs during evacuation. The aims of this study were to evaluate the risk of full thickness rectal prolapse during follow-up of patients with large rectoanal intussusception, and whether therapy improved functional outcome. METHODS Between September 1988 and July 1997, patients diagnosed with a large rectoanal intussusception by cinedefecography (intussusception > or = 10 mm, extending into the anal canal) were retrospectively evaluated. Patients with full thickness rectal prolapse on physical examination or cinedefecography were excluded, as were patients with colonic inertia or a history of surgery for rectal prolapse. The patients were divided into three groups according to the treatment received: group I, conservative dietary therapy; group II, biofeedback; and group III, surgery. Outcomes were obtained by postal questionnaires or telephone interviews. Parameters included age, gender, past medical and surgical history, change of bowel habits, fecal incontinence score, and development of full thickness rectal prolapse. RESULTS Of the 63 patients, 18 were excluded (seven patients had confirmed full thickness rectal prolapse, four had previous surgery for rectal prolapse, three had colonic inertia, and four died). Follow-up data were obtained in 36 (80%) of the remaining 45 patients. The mean follow-up of this group was 45 months (range, 12-118 months). There were 34 women and two men, with a mean age of 72.4 yr (range, 37-91 yr). The mean size of the intussusception was 2.2 cm (range, 1.0-5.0 cm). The patients were classified as follows: group I, 13 patients (36.1%); group II, 13 patients (36.1%); and group III, 10 patients (27.8%). Subjectively, symptoms improved in five (38.5%), four (30.8%), and six (60.0%) patients in the three groups (p > 0.05). Among the patients with constipation, the decrease in numbers of assisted bowel movements per week (time of diagnosis to present) was significantly greater in group II compared to group 1 (8.1+/-2.8 vs 0.8+/-0.5, respectively, p = 0.004). Among the patients with incontinence, incontinence scores improved more in group II as compared to either group I or group III (time of diagnosis to present, 3.7+/-4.2 to 1.1+/-5.4 vs 1.4+/-2.2, respectively, p > 0.05). Six patients (two in group I, three in group II, and one in group III) had the sensation of rectal prolapse on evacuation; however, only one patient in group I developed full thickness rectal prolapse. CONCLUSIONS This study demonstrated that the risk of full thickness rectal prolapse developing in patients medically treated for large intussusception is very small (1/26, 3.8%). Moreover, biofeedback is beneficial to improve the symptoms of both constipation and incontinence in these patients. Therefore, biofeedback should be considered as the initial therapy of choice for large rectoanal intussusception.
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Affiliation(s)
- J S Choi
- Department of Colorectal Surgery, Cleveland Clinic Florida, Fort Lauderdale 33309, USA
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Nam YS, Pikarsky AJ, Wexner SD, Singh JJ, Weiss EG, Nogueras JJ, Choi JS, Hwang YH. Reproducibility of colonic transit study in patients with chronic constipation. Dis Colon Rectum 2001; 44:86-92. [PMID: 11805568 DOI: 10.1007/bf02234827] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE Major therapeutic decisions are rendered based on a single colonic transit study. Therefore, the aim of this study was to assess the reproducibility of colonic transit time in patients with chronic constipation. MATERIALS AND METHODS Fifty-one patients with chronic idiopathic constipation were randomly selected to undergo two separate colonic transit tests. All clinical conditions, methodology, and patients' instructions were identical on both occasions. The gamma rate (linear correlation analysis) was undertaken between the first and second colonic transit times. Groups were divided according to the diagnoses of colonic inertia (slow-transit constipation), paradoxical puborectalis contraction, and chronic idiopathic constipation (normal-transit constipation). RESULTS In 35 of 51 patients (69 percent), the results were identical between the two studies; however, in 16 patients (31 percent), the results were disparate (gamma correlation coefficient = 0.53; P < 0.01). The specific correlation coefficients for patients with colonic inertia, paradoxical puborectalis contraction, and chronic idiopathic constipation were 0.12, 0.21, and 0.60 (P < 0.01), respectively. Moreover, the success rate of colectomy for colonic inertia was significantly higher in patients who underwent a repeat transit study confirming inertia than in patients who underwent colectomy based on a single study. CONCLUSIONS Overall, colonic transit time is reproducible in patients with chronic constipation. The correlation coefficient is best for patients with idiopathic constipation and worst for patients with colonic inertia. This new finding suggests that suboptimal surgical outcome may be attributable to inaccurate diagnosis. Because of this poor correlation coefficient, in patients with colonic inertia, consideration should be given to repeating the colonic transit study before colectomy to help secure the diagnosis and improve outcome.
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Affiliation(s)
- Y S Nam
- Department of Colorectal Surgery, Cleveland Clinic Florida, Fort Lauderdale, Florida 33309-1743, USA
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Hwang YH, Chao KY, Chang CW, Hsiao FT, Chang HL, Han HZ. Lip lead as an alternative measure for lead exposure assessment of lead battery assembly workers. AIHAJ 2000; 61:825-31. [PMID: 11192215 DOI: 10.1080/15298660008984593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This study investigated lead exposures of lead battery assembly workers in Taiwan. A special attempt was made to evaluate the use of lip lead as an alternative index for occupational lead exposure. Ninety-six of 113 workers from a lead battery plant were recruited as study subjects. Air lead; lead loadings on workers' sleeves, gloves, hands, cheeks, and lips; and blood lead were determined for exposure assessment. A questionnaire also was administered to collect information on work history, suspected exogenous lead sources, and personal behavior and activities. Geometric means of total air lead at different subareas ranged from 0.070 (2.5 geometric standard deviation [GSD]) to 0.159 (1.8 GSD) mg/m3. Geometric means of respirable air lead level for different subgroups of workers varied from 0.009 (2.0 GSD) to 0.032 (1.9 GSD) mg/m3, whereas those of the blood lead level ranged from 22.4 (1.3 GSD) to 44.5 (1.3 GSD) microg/dL. The heaviest lead loadings were found for plate-processing workers (e.g., 66.4 [1.5 GSD] on gloves, 0.80 [3.7 GSD] on cheeks, and 0.79 [3.2 GSD] microg/cm2) on bare-hands after washing. Blood lead level was significantly correlated with lead levels in air, lead loadings on lips, and bare hands after washing (r=0.24-0.30). Results of multiple regression analysis showed that only lip lead had a significant effect on the blood lead, whereas respirable air lead and personal behavior had only mild effects in this model. It was concluded that lip lead level may be used as an alternative index of lead exposure to facilitate the estimation of lead uptake through ingestion.
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Affiliation(s)
- Y H Hwang
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, ROC.
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Choi JS, Potenti F, Wexner SD, Nam YS, Hwang YH, Nogueras JJ, Weiss EG, Pikarsky AJ. Functional outcomes in patients with mucosal ulcerative colitis after ileal pouch-anal anastomosis by the double stapling technique: is there a relation to tissue type? Dis Colon Rectum 2000; 43:1398-404. [PMID: 11052517 DOI: 10.1007/bf02236636] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE The aim of this study was to evaluate any differences in functional outcome in patients with mucosal ulcerative colitis after restorative proctocolectomy and ileal pouch-anal anastomosis with use of the double stapling technique relative to the type of tissue in the stapled doughnut. METHODS Between September 1988 and June 1997, the pathology of all patients with mucosal ulcerative colitis who underwent ileal pouch-anal anastomosis with use of the double stapling technique were reviewed. Information was obtained regarding the tissue types in the distal tissue rings (doughnuts) obtained from the stapled ileal pouchanal anastomosis. The level of anastomosis was classified according to the type of tissue in the distal doughnut: Group I- patients in whom the anal transitional zone was removed and the distal doughnut included squamous epithelium or transitional epithelium and Group II- patients in whom the anal transitional zone was preserved because the distal doughnut revealed only columnar epithelium. Functional outcomes were assessed and compared by detailed questionnaires mailed to all patients at least one year after ileal pouch-anal anastomosis surgery. RESULTS Distal doughnuts were obtained from the stapled ileal pouch-anal anastomosis in 222 patients with mucosal ulcerative colitis. Follow-up data at a mean of 38 (range, 12-132) months were obtained in 138 (62.2 percent) patients, including 72 males, with a mean age of 46.9 (range, 13-79) years. Group I consisted of 40 patients (29 percent; 35 (25.4 percent) who had squamous epithelium and 5 (3.6 percent) who had transitional epithelium in the distal tissue rings). Group II consisted of 98 patients (71 percent) with columnar epithelium in the distal tissue rings. Age at diagnosis and operation, duration of disease, length of follow-up, and stage of pouch surgery were similar in the two groups. Incontinence scores, frequency of bowel movement, use of a protective pad, discrimination between gas and stool, use of antidiarrheals, life-style alteration, and patient satisfaction showed similar functional results between the two groups. CONCLUSIONS The tissue type in the stapler distal doughnut did not greatly influence functional outcome. Failure to identify a relationship may attest to the variable height and composition of the anal transitional zone.
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Affiliation(s)
- J S Choi
- Department of Colorectal Surgery, Cleveland Clinic Florida, Fort Lauderdale 33309, USA
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Hwang YH, Matsui T, Hanada T, Shimoda M, Matsumoto K, Osajima Y. Desorption behavior of sorbed flavor compounds from packaging films with ethanol solution. J Agric Food Chem 2000; 48:4310-4313. [PMID: 10995356 DOI: 10.1021/jf991082h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Desorption behavior of sorbed flavor compounds such as ethyl esters, n-aldehydes, and n-alcohols from LDPE and PET films was investigated in 0 to 100% (v/v) ethanol solutions at 20 degrees C, 50 degrees C, and 60 degrees C. In both films, the desorption apparently increased with increasing ethanol concentration and treatment temperature, depending on the compatibility of the flavor compound with the solvent. Namely, the partition coefficient of ethyl esters, n-aldehydes, and n-alcohols in the LDPE film turned out to be approximately zero at >/=60%, >/=80%, and >/=40% (v/v) ethanol, respectively (for PET film, >/=80%, >/=80%, and >/=40% (v/v) ethanol concentrations were required for complete desorption, respectively). As for physical properties (heat of fusion, melting point, and tensile strength and elongation at break) of LDPE and PET films, there were no significant differences between intact film and the treated film with 60% (v/v) ethanol for 30 min at 60 degrees C. These results suggest that it is possible to apply a desorption solvent such as ethanol solution for desorption of sorbed flavor compounds from packaging films with no physical change in the film properties by this desorption treatment.
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Affiliation(s)
- Y H Hwang
- Bioscience and Biotechnology, Division of Bioresource and Bioenvironmental Sciences, Graduate School, Kyushu University, 6-10-1, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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Abstract
To delineate potential exposure in ion implanter maintenance, the authors recruited 21 maintenance engineers (exposed group) and 10 computer programmers (controls) at three semiconductor manufacturing facilities. Samples of air, wipes, and urine; used cleaning cloths; and used gloves were collected for the characterization of arsenic exposure. Arsenic levels were very low in environmental samples, but high arsenic levels were found in some wipe samples, used cleaning cloths, and gloves. The average baseline content of urinary arsenic measured for maintenance engineers was 3.6 microg/g creatinine. Maintenance engineers experienced an increase of 1.0-7.8 microg/g creatinine in urinary arsenic levels during ion implanter maintenance. Results of a mixed-model analysis indicated that urinary arsenic levels were associated significantly with time series (p = .0001), and the extent of association was different among the three facilities (p = .0226). The results of this study indicate that arsenic intake via ingestion, rather than through inhalation, might play a significant role in the elevation of urinary arsenic levels. However, a series of urine samples with self-reference continue to be a good approach for the monitoring of low-level arsenic exposure.
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Affiliation(s)
- Y H Hwang
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Republic of China
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Wexner SD, Hwang YH. Clinical status of laparoscopic bowel surgery for GI malignancy. Oncology (Williston Park) 2000; 14:1131-43; discussion 1143-4, 1147-9. [PMID: 10989824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Laparoscopic colorectal surgery is being utilized increasingly for benign diseases. Recent published series have proven that morbidity and mortality from laparoscopic procedures are superior to those seen after traditional open procedures. However, although the technical feasibility of laparoscopic bowel resections has been confirmed, the oncologic advisability has not. The procedures are not yet standards of care, due to port site recurrences, inadequate lymph node harvest, inadequate resection margins, and level of ligation. At present, laparoscopic bowel resection for cure of malignancy does not confer significant benefits when compared to laparotomy and, indeed, has been associated with some serious problems. Long-term critical evaluation of large numbers of patients in prospective, randomized trials is needed to define any merits of laparoscopy. Until such data become available, laparoscopy for attempted cure of colorectal malignancy should be performed only within the context of peer-reviewed, externally monitored, prospective, randomized trials. However, these techniques are perfectly appropriate for palliation of metastatic disease.
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Affiliation(s)
- S D Wexner
- Dept of Colorectal Surgery, Cleveland Clinic Florida, USA
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Shen GQ, Toulouse J, Beaufils S, Bonello B, Hwang YH, Finkel P, Hernandez J, Bertault M, Maglione M, Ecolivet C, Cummins HZ. Experimental studies of the liquid-glass transition in trimethylheptane. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 2000; 62:783-792. [PMID: 11088534 DOI: 10.1103/physreve.62.783] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/1999] [Indexed: 05/23/2023]
Abstract
The molecular glass former trimethylheptane was studied by calorimetric, dielectric, ultrasonic, neutron scattering, Brillouin scattering, and depolarized light-scattering techniques. The molecular structure appears to be nearly spherical optically as indicated by the low depolarization ratio and dielectric susceptibility values. A preliminary mode-coupling theory (MCT) analysis of the light-scattering and neutron-scattering data indicates that T(C) greater, similar150 K, at least 25 K above T(G). The susceptibility minima were analyzed with the MCT interpolation equation, and disagreement between the light and neutron results was observed despite the apparent isotropy of the molecules.
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Affiliation(s)
- GQ Shen
- Department of Physics, City College of the City University of New York, New York, New York 10031, USA
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Abstract
OBJECTIVES Risk factors for increased blood lead concentration (BPb) has been investigated. However, the effect of sibship and Chinese herbal medicine on BPb has not been systematically studied. In this study BPb data from voluntary testing was used to determine if Chinese herbal medicine and sibship were associated with BPb. METHODS 319 children aged 1-7 were tested for BPb. Meanwhile, parents were interviewed to obtain information including consumption of Chinese herbal medicine, living environment, lifestyle, and sibship of the children tested. RESULTS The mean (SD) BPb of 319 preschool children was 4.4 (2.4) micrograms/dl. The consumption of Ba-baw-san (a Chinese herbal medicine) was significantly associated with increased BPb in children (p = 0.038). Further multivariate regression analysis of BPb in 50 pairs of siblings showed the factors of being brothers explained 75% of variation for BPb, and being sisters and brother-sister explained 51% and 41% of variation respectively. CONCLUSION Chinese herbal medicine and children's play patterns within the family expressed in different types of sibship are the main determinants of low concentrations of BPb in preschool children of Taiwan.
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Affiliation(s)
- T J Cheng
- Graduate Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University College of Public Health, Taipei, Taiwan
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Wang JD, Soong WT, Chao KY, Hwang YH, Jang CS. Occupational and environmental lead poisoning: case study of a battery recycling smelter in Taiwan. J Toxicol Sci 1998; 23 Suppl 2:241-5. [PMID: 9760474 DOI: 10.2131/jts.23.supplementii_241] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The rapid industrialization in Taiwan has caused both prosperity and environmental pollution. The purpose of this study is to demonstrate a case of both occupational and environmental lead poisoning. A patient of lead poisoning initiated a survey of the battery recycling factory, which revealed that 31 of 64 workers suffered from lead poisoning. Children who attended a nearby kindergarten showed a significant increase of blood lead up to 15-25 micrograms/dl and a mild but significant decrease of IQ (intelligent quotient, by Binet-Simon scale) if compared with children of a nonexposed but socioeconomically comparable kindergarten. Outdoor workers of the nearby forging factory also showed a significant increase of blood lead if compared with indoor workers or workers of another nonexposed forging factory 20 Km away. Air sampling showed an average of more than 10 micrograms/m3 in the kindergarten. Soil sampling and analysis also revealed 400 folds increase of lead content, which decreased if the sample was taken deep down to 15-30 cm or 350 meters away from the battery recycling smelter. Moreover, after children were moved away from the pollution source, follow-up examination performed 2.5 years later showed a significant decrease of blood lead and partial recovery of IQ among them.
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Affiliation(s)
- J D Wang
- Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, College of Public Health, Taipei
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Hwang YH, Bornschein RL, Grote J, Menrath W, Roda S. Urinary arsenic excretion as a biomarker of arsenic exposure in children. Arch Environ Health 1997; 52:139-47. [PMID: 9124875 DOI: 10.1080/00039899709602878] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Urinary arsenic concentration has been used generally for the determination of exposure, but much concern has been raised over the most appropriate expression for urinary arsenic levels. In this study, we examined the influence of various adjustments of expressing urinary arsenic data. All children who were less than 72 mo of age and who were potty trained were invited to participate in the present study. Urine, soil, and dust samples were collected, and arsenic measurements were made. The geometric mean of speciated urinary arsenic among children who provided first-voided urine samples on 2 consecutive mornings was 8.6 microg/l (geometric standard deviation = 1.7, n = 289). Speciated urinary arsenic was related significantly to soil arsenic in bare areas (p < .0005). Use of a single urine sample versus the average of two first-voided urine samples collected on 2 consecutive mornings did not significantly alter the relationship between environmental arsenic and urinary arsenic levels. Furthermore, none of the adjustments to urinary concentration improved the strength of correlation between urinary arsenic and soil arsenic levels. Concentration adjustments may not be necessary for urinary arsenic levels obtained from young children who provide first-void samples in the morning.
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Affiliation(s)
- Y H Hwang
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Republic of China
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Hwang YH, Bornschein RL, Grote J, Menrath W, Roda S. Environmental arsenic exposure of children around a former copper smelter site. Environ Res 1997; 72:72-81. [PMID: 9012374 DOI: 10.1006/enrs.1996.3691] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Arsenic residues in the communities surrounding former smelters remain a public health concern, especially for infants and children. To evaluate environmental exposure among these children, a population-based cross-sectional study was conducted in the vicinity of a former copper smelter in Anaconda, Montana. A total of 414 children less than 72 months old were recruited. First morning voided urine samples and environmental samples were collected for arsenic measurements. The geometric mean of speciated urinary arsenic was 8.6 microg/liter (GSD = 1.7, N = 289). Average arsenic levels of different types of soil ranged from 121 to 236 microg/g and were significantly related to proximity and wind direction to the smelter site. The same significant relationship was observed for interior dust arsenic. Speciated urinary arsenic was found to be significantly related to soil arsenic in bare areas in residential yards (P < 0.0005). In general, elevated excretion of arsenic was demonstrable and warranted parents' attention to reduce exposure of their children to environmental arsenic.
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Affiliation(s)
- Y H Hwang
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Republic of China.
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Park SK, Yoon YH, Kim BC, Hwang YH, Chung IK, Nam HG, Kim DU. Pollen of a male-sterile mutant of Arabidopsis thaliana isolated from a T-DNA insertion pool is not effectively released from the anther locule. Plant Cell Physiol 1996; 37:580-585. [PMID: 8819307 DOI: 10.1093/oxfordjournals.pcp.a028984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have isolated a male-sterile mutant from a pool of T-DNA insertional lines of Arabidopsis thaliana generated by an in planta transformation procedure [Chang et al. (1994) Plant J. 5: 551]. Pollen in this mutant is not effectively released from anther locules after cleavage of the stomium. Most mutant pollen grains are round, in contrast to the tricolpate wild-type pollen, and some pollen grains show an abnormal surface structure. Manually released mutant pollen grains are not fertile and show defects in pollen tube germination in vitro. Genetic analysis disclosed that this lesion is due to a single recessive nuclear mutation located on chromosome 3 closely linked to the gll locus. The mutation locus is tightly linked to the inserted T-DNA.
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Affiliation(s)
- S K Park
- Department of Agronomy, College of Agriculture, Kyungpook National University, Taegu, South Korea
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