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Dong Hyun Shin  (Shin DH) 7 Articles
Effect of Valsartan on Blood Pressure and Urinary Albumin Excretion in Hypertensive Type 2 Diabetic Patients: An Open-Label, Multicenter Study.
Se Jun Park, Dae Jung Kim, Hae Jin Kim, Soo Yeon Park, Ji A Seo, Nan Hee Kim, Sung Hee Choi, Soo Lim, Hak Chul Jang, Seung Hyun Ko, Ki Ho Song, Yu Bae Ahn, Soo Kyoung Kim, Yong Wook Cho, Jun Goo Kang, Sung Hee Ihm, Cheol Young Park, Sung Woo Park, Dong Hyun Shin, Yong Hyun Kim, Kwan Woo Lee
Korean Diabetes J. 2008;32(6):513-521.   Published online December 1, 2008
DOI: https://doi.org/10.4093/kdj.2008.32.6.513
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BACKGROUND
Activation of renin-angiotensin system (RAS) has been an important mechanism of microvascular and macrovascular complications in diabetic patients. It has been reported that RAS blockades reduce the development and progression of diabetic nephropathy. The aim of this study was to evaluate whether valsartan, an angiotensin II receptor blocker (ARB), reduced blood pressure and urinary albumin excretion rate (UAER) in hypertensive type 2 diabetic patients. METHOD: Three hundred forty-seven hypertensive type 2 diabetic patients who had not taken angiotensin converting enzyme inhibitors or ARB for 6 months prior to this study were enrolled. We measured blood pressure and UAER before and after 24 weeks of valsartan treatment. RESULT: Baseline mean systolic and diastolic blood pressure was 143 +/- 15 and 87 +/- 11 mmHg, respectively and the median albumin excretion rate was 27 ug/mg. Reduction in systolic and diastolic blood pressure was 16 mmHg/10 mmHg and the median UAER was 19.3 ug/mg after 24 weeks (P < 0.01, respectively). When we divided the subjects into three groups according to the UAER (normoalbuminuria, microalbuminuria and macroalbuminuria), significant changes were reported in the microalbuminuria and the macroalbuminuria groups. Thirty-eight (42%) patients with microalbuminuria improved to normoalbuminuria and twelve (41%) patients with macroalbuminuria improved to microalbuminuria. We found an association between the improvement of blood pressure and UAER (R = 0.165, P = 0.015). CONCLUSION: We concluded that valsartan reduces urinary albumin excretion and blood pressure in hypertensive type 2 diabetic patients.
Relations between Insulin Resistance and Hematologic Parameters in Elderly Koreans: Southwest Seoul (SWS) Study.
Kye Won Lee, Hye Jin Yoo, Soo Yeon Park, Ohk Hyun Ryu, Sang Soo Park, Soon Beom Kwon, Hee Young Kim, Ji A Seo, Jeong Heon Oh, Dong Hyun Shin, Sin Gon Kim, Nan Hee Kim, Kyung Mook Choi, Sei Hyun Baik, Dong Seop Choi, Hyoung Jin Kim
Korean Diabetes J. 2003;27(4):352-361.   Published online August 1, 2003
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AbstractAbstract PDF
BACKGROUND
The clustering of cardiovascular risk factors is known as insulin resistance syndrome. Hyperinsulinemia has been suggested as a cardiovascular risk factor due to the capacity of insulin to induce vascular endothelial proliferation and atherosclerosis. Insulin also has been shown to stimulate erythroid colony formation independently of erythropoietin. WBC count is one of the major components of the inflammatory process and is increased by IL-6, which is high in those with features of insulin resistance. In this study, we investigated whether insulin resistance affects hematological parameters. METHODS: In this study, 1,314, randomly selected, non-diabetic, elderly subjects over 60 years living in the southwest area of Seoul were recruited. Subjects underwent 75 g OGTT and careful physical examinations during evaluation, and were interviewed using a standardized questionnaire. Biochemical data and hematologic parameters were also measured. Insulin resistance was calculated by HOMA (homeostasis model assessment) method. Analysis of variance, Duncan's multiple comparisons and multiple linear regression analysis were carried out. RESULTS: In the male non-smoking group we found a correlation between insulin resistance and hemoglobin concentration (r=0.20, p=0.0186). In the female non- smoking group we found correlations between insulin resistance and both hemoglobin concentration (r=0.10, p=0.0017) and white blood cell (WBC) count (r=0.15, p=0.001). Hemoglobin concentration and WBC count were also correlated with BMI, systolic and diastolic blood pressure, lipid profiles and fasting insulin levels in female non-smokers. In multiple regression analysis, using HOMA IR as a dependent variable, we found significance in the variables of hemoglobin concentration, WBC count, age, BMI and triglyceride level. CONCLUSION: Our study provided evidence for a relation between insulin resistance and hematological parameters such as hemoglobin concentration and WBC count in elderly Koreans. This suggests that increased hemoglobin level and WBC count could be considered as novel aspects of the met.
Detection of Diabetic Autonomic Neuropathy by 24-Hour Heart Rate Variability Analysis in Type 2 Diabetes Mellitus Patients.
Young Hee Rho, Nan Hee Kim, Dong Lim Kim, Dong Hyun Shin, Sin Gon Kim, Kyung Mook Choi, Woo Hyuk Song, Sei Hyun Baik, Woo Keun Seo, Min Kyu Park, Dong Seop Choi
Korean Diabetes J. 2002;26(3):208-219.   Published online June 1, 2002
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AbstractAbstract PDF
BACKGROUND
Diabetic autonomic neuropathy is a relatively common diabetic complication, associated with high long-term mortality. Ewing's test is known as the 'gold standard' for evaluating and diagnosing this disease, yet is not widely used due to the inconvenient procedures of the test. 24-hour Holter EKG monitoring, and the analytical product, heart rate variability, is being introduced as a relatively simple and reliable procedure for the evaluation of diabetic autonomic neuropathy. We explored whether such heart rate variability products derived from Holter monitoring, correlated with the presence, absence, or severity of diabetes mellitus, and whether it correlated well with conventional autonomic tests. METHODS: We compared 59 type 2 diabetic patients with 71 normal subjects. All underwent 24-hr Holter EKG monitoring and basic autonomic evaluations, such as the head-up tilting, hand grip, and deep breathing-heart rate variability tests. Those who had diabetes also underwent evaluation for basic blood chemistry, and complication studies, for things such as: 24-hour urine albumin excretion, fundoscopy and nerve conduction. RESULTS: Variables for heart rate variability were expressed as SDDN, rMSSD, LF, HF, and LF/HF, where SDDN is the Standard Deviation of all RR intervals, rMSSD the square root of the mean of the sum of the squares of differences between adjacent RR intervals, LF the power in the Low Frequency range and HF the power in the High Frequency range, with LF/HF being the ratio between LF and HF. Heart rate variability was significantly lower in terms of rMSSD, LF, HF, but not in terms of the LF/HF ratio, for the diabetic patients compared to the normal subjects. These three variables also correlated with the conventional autonomic tests of systolic blood pressure changes during standing up (negatively), and heart rate variability during deep breathing (positively). SDDN, rMSSD, LF, and HF also correlated negatively with the duration of diabetes. SDDN, LF and HF were significantly lower among patients who had complications such as: retinopathy, nephropathy or peripheral neuropathy, than in those who did not. CONCLUSION: Heart rate variability was lower in type 2 diabetic patients than the control subjects, which correlated well with the duration of diabetes mellitus, diabetic chronic complications and the conventional autonomic nervous function tests, so could be an useful adjunct or even a replacement, for conventional autonomic nervous system testing procedures. More research is needed in this field.
Plasma Leptin Concentration, Obesity, and Insulin Resistance in Healthy Korean Population.
Dong Lim Kim, Nan Hee Kim, Dong Hyun Shin, Sin Gon Kim, Kyung Mook Choi, Jin Kwan Kim, Chol Shin, Seung Gwan Lee, Sei Hyun Baik, Dong Seop Choi
Korean Diabetes J. 2002;26(2):100-111.   Published online April 1, 2002
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BACKGROUND
Leptin is a hormone that regulates food intake and body weight. It has been demonstrated that the plasma leptin levels correlates with body adiposity. Increased adiposity is accompanied by a low insulin sensitivity, which turns into insulin resistance. Recent studies suggest a complex interrelationship between leptin and insulin or insulin resistance. Therefore, the relationship between leptin and the variables of body adiposity, and insulin resistance in a non-diabetic population was examined. METHODS: 555 healthy non-diabetic people aged 20 to 80 were enrolled in this study. Leptin was measured by the mean radioimmunoassay. Multiple logistic regression analysis was performed with leptin as a dependent variable and with age, sex, BP, the lipid profile, the fasting plasma glucose levels, HOMA-IR and the trunk fat contents as independent variables. RESULTS: The plasma leptin concentrations were higher in women than in men. The leptin concentrations correlated with the body fat content, BMI and HOMA-IR but, less so with age, the fasting plasma glucose levels, the postprandial glucose levels, total cholesterol and LDL-cholesterol levels. After adjusting for the body mass index, the leptin levels significantly correlated with both the body fat content and the HOMA-IR. The results between males and females were similar when the data was analyzed after dividing by gender. Gender, the trunk fat content, HOMA-IR, and the total cholesterol and HDL cholesterol levels were independent variables which influences the log transformed leptin in multiple logistic regression analysis. When the subjects were grouped according to the number of insulin resistance syndrome including dyslipidemia, obesity, hypertension, and glucose intolerance, there was a linear increase in the leptin concentration with an increase in the number of the components of insulin resistance syndrome. CONCLUSION: The plasma leptin concentrations are related to adiposity, insulin resistance, and dyslipidemia in the non-diabetic Korean population. The relationship between leptin and insulin resistance independent of body fat suggests that insulin resistance might play some role in the development of hyperleptinemia and vice versa
Effect of Protein Kinase C Inhibitor on Glucose Transporter-1 (GLUT1) Expression in Cultured Rat Mesangial Cells.
Ie Byung Park, Dae Ryong Cha, Dong Rim Kim, Sin Gon Kim, Dong Hyun Shin, Kyung Mook Choi, Nan Hee Kim, Sei Hyun Baik, Dong Seop Choi
Korean Diabetes J. 2001;25(3):218-229.   Published online June 1, 2001
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BACKGROUND
Recent studies have suggested that increased glucose uptake via GLUT1 may be a major determinant of glucose utilization and extracellular matrix formation in mesangial cells. This study was to evaluate the effect of protein kinase C inhibitor on glucose transporter-1 (GLUT1) expression in cultured rat mesangial cells. METHODS: The GLUT1 expression was evaluated in mesangial cells exposed to various glucose concentrations of media (5.5 mM, 15 mM or 30 mM) and incubation times (6 hr, 24 hr or 72 hr) by semiquantitative RT-PCR and western blot analysis. The effect of protein kinase C (PKC) inhibitor, calphostin C and phorbol 12-myristate 13-acetate (PMA) on GLUT1 expression was also evaluated under the same conditions. RESULTS: The GLUT1 mRNA expressions were significantly increased in MG (15 mM) and HG (30 mM) than those in NG (5.5 mM) with incubation of 6 hr, 24 hr and 72 hr, respectively. In HG media, the GLUT1 mRNA expression with incubation of 24 hr and 72 hr were significantly increased than that with incubation of 6 hr, respectively. In HG media, the GLUT1 mRNA expressions were significantly reduced in calphostin C and PMA treated groups compared with those in untreated groups. In western blot analysis of HG media, GLUT1 proteins were identified in PMA- or calphostin C-untreated group and PMA 6 hr treated group, but not identified in PMA 24 hr treated group and in calphostin C-treated groups with incubation of 6 hr and 24 hr. CONCLUSION: PKC inhibitors decrease glucose-induced GLUT1 expression under high glucose concentration in mesangial cells. These results suggest that PKC pathway may regulate GLUT1 expression under high glucose concentration in cultured rat mesangial cells.
Prevalence of Diabetes mellitus in Elderly Korean in Southwest Seoul (SWS Study): Comparision of 1997 ADA and 1985 WHO Criteria in Elderly Korean.
Sei Hyun Baik, Kyung Mook Choi, Young Jik Cho, Kyung Oh Kim, Dong Rim Kim, Nan Hee Kim, Shin Gon Kim, Dong Hyun Shin, Ie Byung Park, Dong Seop Choi
Korean Diabetes J. 2001;25(2):125-132.   Published online April 1, 2001
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AbstractAbstract PDF
BACKGROUND
The prevalence of diabetes in Korea is increasing rapidly, however we do not have much reliable data to prove it. Thus, the Southwest Seoul Study (SWS Study) designed to investigate the prevalence of diabetes (Clinical impact of new diagnostic criteria of ADA compare to the one of WHO), other metabolic diseases, and the proportion of diabetes related mortalities in the elderly Korean southwest Seoul population in prospectively. However, in this report we summarized the prevalence of diabetes only. METHODS: Randomly selected 1,737 elderly subjects over 60 years who lived in southwest area of Seoul were recruited in this study. Subjects underwent 75 gOGTT, interviewed using the standardized questionnaire, and careful physical examinations during the evaluation. Biochemical data were collected from 1,652 subjects and were analysed for this report. Of 1,652 subjects, we identified 196 pre-diabetics. However, these subjects were included in this analysis. ADA criteria [FBS>or=126 mg/dL (7.0 mmol/L)] and WHO criteria [75 gOGTT, pp2h >or= 200 mg/dL (11.1 mmol/L)] were used as the criteria for diagnosis of diabetes. ADA and WHO criteria for impaired glucose tolerance [IGT, WHO: FBS<7.0 mmol/L, 7.8 mmol/L
Urinary albumin excretion, von Willebrand factor and macrovascular disease in patients with NIDDM.
Sin Gon Kim, Soo Mi Kim, Dong Hyun Shin, Nan Hee Kim, Yoon Sang Choi, Ie Byung Park, Sei Hyun Baik, Dong Seop Choi
Korean Diabetes J. 1997;21(2):176-184.   Published online January 1, 2001
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BACKGROUND
Increased urinary albumin excretion (UAE) is not only an independent predictor of progressive renal disease but also an important marker of atherosclerotic disease in patients with NIDDM. However, the pathaphysiologic basis of this observation is poorly understood. Recently, one interesting hypothesis suggested: UAE rnerely reflects a glomerular manifestation of an otherwise generalized vascular dysfunction(hyperpermeable state), and Stehouwer et al. Reported a strong relationship between plasma von Willebrand factor level(a measure of endothelial dysfunction), UAE and cardiovascular diseases. Therefore, we studied the relationship between UAE, plasma vWF and macrovascular disease in patients with NIDDM. METHODS: We measured UAE and plasma vWF levels in 102 patients with NIDDM, and investigated the telationship between these values and macrovascular diseses. Also, we assesed the risk factars for macrovascular disease. RESULTS: 1) Among total of 102 patients, nonnoalbuminuria, microalbuminuria and macroalbuminuria group were 58 patients(56.9%), 28 patients(27.5%) and 16 patients(15.6%), respectively. 2) The prevalencies of hypertension, diabetic retinopathy and macrovascular diseases were the highest in macroalbuminuria group, followed by microalbuminuria and norrnoalbuminuria group in order of frequency. 3) Plasma vWF and UAE levels were significantly correlated(r=0.44). 4) Plasma vWF concentrations were higher in patients with macrovascular diseases than in those without macrovascular diseases, and also higher in patients with retinopathy compared with those without retinopathy. 5) Multivariate logistic regression analysis showed that age, smoking and vWF were independent risk factors for macrovascular diseases. CONCLUSION: 1) As plasma vWF and UAE values were increased, more macrovascular diseases were observed in patients with NIDDM. 2) Plasma vWF may be used as an indicator of macrovascular disease in patients with NIDDM.

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