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Won Young Lee  (Lee WY) 16 Articles
The Cutoff Value of HbA1c in Predicting Diabetes in Korean Adults in a University Hospital in Seoul.
Ji Cheol Bae, Eun Jung Rhee, Eun Suk Choi, Ji Hoon Kim, Won Jun Kim, Seung Hyun Yoo, Se Eun Park, Cheol Young Park, Won Young Lee, Ki Won Oh, Sung Woo Park, Sun Woo Kim
Korean Diabetes J. 2009;33(6):503-510.   Published online December 1, 2009
DOI: https://doi.org/10.4093/kdj.2009.33.6.503
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  • 6 Crossref
AbstractAbstract PDF
BACKGROUND
Glycated hemoglobin (HbA1c) levels represent a 2~3 month average of blood glucose concentration. The use of HbA1c as a diagnostic tool for diabetes is gaining interest. Therefore, we determined the cutoff point of HbA1c for predicting abnormal glucose tolerance status in non-diabetic Korean subjects. METHODS: We analyzed the data from 1,482 subjects without diabetes mellitus in whom a 75-g oral glucose tolerance test (OGTT) was performed due to suspected abnormal glucose tolerance. We obtained an HbA1c cutoff point for predicting diabetes using Receiver Operating Characteristic (ROC) curve analysis. RESULTS: A cut-off point of 5.95% HbA1c yielded sensitivity of 60.8% and specificity of 85.6%, respectively, for predicting diabetes. There was a difference in HbA1c cut-off value between men and women, 5.85% and 6.05%, respectively. CONCLUSION: To use the cut-off point of 5.95% HbA1c for predicting undiagnosed diabetes in Koreans may be reliable. However, studies of different ethnic groups have reported disparate HbA1c cut-off points. Thus, ethnicity, age, gender, and population prevalence of diabetes are important factors to consider in using elevated HbA1c value as a tool to diagnose diabetes.

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  • The Cutoff Value of HbA1c in Predicting Diabetes and Impaired Fasting Glucose
    Seyoung Kwon, Youngak Na
    The Korean Journal of Clinical Laboratory Science.2017; 49(2): 114.     CrossRef
  • Role of HbA1c in the Screening of Diabetes Mellitus in a Korean Rural Community
    Jae Hyun Kim, Gun Woo Kim, Mi Young Lee, Jang Yel Shin, Young Goo Shin, Sang Baek Koh, Choon Hee Chung
    Diabetes & Metabolism Journal.2012; 36(1): 37.     CrossRef
  • Impact of HbA1c Criterion on the Detection of Subjects with Increased Risk for Diabetes among Health Check-Up Recipients in Korea
    Hong-Kyu Kim, Sung-Jin Bae, Jaeone Choe
    Diabetes & Metabolism Journal.2012; 36(2): 151.     CrossRef
  • The Utility of HbA1c as a Diagnostic Criterion of Diabetes
    Hee-Jung Kim, Eun Young Choi, Eal Whan Park, Yoo Seock Cheong, Hong-Yoen Lee, Ji Hyun Kim
    Korean Journal of Family Medicine.2011; 32(7): 383.     CrossRef
  • 2011 Clinical Practice Guidelines for Type 2 Diabetes in Korea
    Seung-Hyun Ko, Sung-Rea Kim, Dong-Joon Kim, Seung-Joon Oh, Hye-Jin Lee, Kang-Hee Shim, Mi-Hye Woo, Jun-Young Kim, Nan-Hee Kim, Jae-Taik Kim, Chong Hwa Kim, Hae Jin Kim, In-Kyung Jeong, Eun-Kyung Hong, Jae-Hyoung Cho, Ji-Oh Mok, Kun-Ho Yoon
    Diabetes & Metabolism Journal.2011; 35(5): 431.     CrossRef
  • 2011 Clinical Practice Guidelines for Type 2 Diabetes in Korea
    Seung-Hyun Ko, Dong-Joon Kim, Seung-Joon Oh, Hye-Jin Lee, Kang-Hee Shim, Mi-Hye Woo, Jun-Young Kim, Nan-Hee Kim, Jae-Taik Kim, Chong Hwa Kim, Hye Jin Kim, In-Kyung Jeong, Eun-Gyoung Hong, Jae-Hyoung Cho, Ji-Oh Mok, Kun-Ho Yoon, Sung-Rea Kim
    Journal of Korean Diabetes.2011; 12(4): 183.     CrossRef
Effects of Adding omega-3 Fatty Acids to Simvastatin on Lipids, Lipoprotein Size and Subspecies in Type 2 Diabetes Mellitus with Hypertriglyceridemia.
Won Jun Kim, Chang Beom Lee, Cheol Young Park, Se Eun Park, Eun Jung Rhee, Won Young Lee, Ki Won Oh, Sung Woo Park, Dae Jung Kim, Hae Jin Kim, Seung Jin Han, Hong Keum Cho
Korean Diabetes J. 2009;33(6):494-502.   Published online December 1, 2009
DOI: https://doi.org/10.4093/kdj.2009.33.6.494
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AbstractAbstract PDF
BACKGROUND
omega-3 fatty acids are known to improve lipid profiles, the distribution of lipoprotein subclasses, and secondary prevention against post-myocardial infarction. Rare reports have emerged of synergistic results of omega-3 fatty acids with simvastatin in cases of type 2 diabetes mellitus with hypertriglyceridemia. The purpose of this study was to determine the combined relationship of omega-3 fatty acids plus simvastatin on lipid, lipoprotein size and the types of subspecies. METHODS: This randomized, multi-center, comparison study evaluated eight weeks of combination therapy (omega-3 fatty acids (Omacor) 4 g/day plus simvastatin 20 mg/day) or monotherapy (simvastatin 20 mg/day) for at least six weeks in 62 diabetic patients. Subjects with a triglyceride concentration of more than 200 mg/dL were eligible for inclusion. RESULTS: No significant differences for omega-3 fatty acids + simvastatin versus simvastatin alone were observed for triglycerides (-22.7% vs. -14.3%, P = 0.292), HDL peak particle size (+2.8% vs. -0.4%, P = 0.076), LDL mean particle size (+0.4% vs -0.1%, P = 0.376) or LDL subspecies types, although the combination therapy showed a tendency toward lower triglycerides, larger HDL, and LDL particle sizes than did the monotherapy. There were no significant differences between the two groups in regard to HDL-C, LDL-C, or HbA1c levels. There were no serious adverse events and no abnormalities in the laboratory values associated with this study. CONCLUSION: omega-3 fatty acids were a safeform of treatment in hypertriglyceridemic patients with type 2 diabetes mellitus. But, regarding efficacy, a much larger sample size and longer-term follow-up may be needed to distinguish between the effects of combination therapy and monotherapy.
Adipokine Concentrations in Pregnant Korean Women with Normal Glucose Tolerance and Gestational Diabetes Mellitus.
Eun Suk Oh, Jung Hee Han, Sung Min Han, Jee Aee Im, Eun Jung Rhee, Cheol Young Park, Ki Won Oh, Won Young Lee
Korean Diabetes J. 2009;33(4):279-288.   Published online August 1, 2009
DOI: https://doi.org/10.4093/kdj.2009.33.4.279
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  • 3 Crossref
AbstractAbstract PDF
BACKGROUND
The aims of this study were to compare adipokine concentrations of pregnant women in the 24th~28th weeks of gestation to those of non-pregnant women. We compared the concentrations of adipokines in women with gestational diabetes mellitus (GDM), gestational impaired glucose tolerance (GIGT) and normal glucose tolerance (NGT). We also investigated the role of adipokines in the development of gestational glucose intolerance. METHODS: We surveyed 129 pregnant women who underwent a 100 g oral glucose tolerance test (OGTT) during the 24th~28th weeks of gestation. Participants were classified into three groups: (1) NGT (n = 40), (2) GIGT (n = 45), and (3) GDM (n = 44). Pregnant subjects with NGT were matched to non-pregnant controls for BMI and age (n = 41). RESULTS: Pregnant women with NGT exhibited significantly decreased adiponectin levels and elevated leptin levels compared to non-pregnant controls. Mean plasma resistin levels were significantly higher in women with GDM and GIGT than in women with NGT. Resistin and fasting glucose were significant predictors for the development of gestational glucose intolerance. CONCLUSION: Plasma adiponectin levels were decreased and leptin levels were increased in pregnant subjects with NGT compared to BMI and age matched non-pregnant controls. Women with GDM and GIGT exhibit significantly elevated concentrations of resistin compared with women with NGT. Increased resistin levels were also associated with the development of gestational glucose intolerance. Resistin may play an important role on the development of gestational glucose intolerance in Korean women.

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  • Maternal serum level of resistin is associated with risk for gestational diabetes mellitus: A meta-analysis
    Shi-Min Hu, Meng-Shi Chen, Hong-Zhuan Tan
    World Journal of Clinical Cases.2019; 7(5): 585.     CrossRef
  • Letter: Adipokines and Insulin Resistance According to Characteristics of Pregnant Women with Gestational Diabetes Mellitus (Diabetes Metab J 2017;41:457-65)
    Ohk-Hyun Ryu
    Diabetes & Metabolism Journal.2018; 42(1): 87.     CrossRef
  • Adipokines and Insulin Resistance According to Characteristics of Pregnant Women with Gestational Diabetes Mellitus
    Eon Ju Jeon, Seong Yeon Hong, Ji Hyun Lee
    Diabetes & Metabolism Journal.2017; 41(6): 457.     CrossRef
The Relationship between Serum Retinol-Binding Protein 4 Levels and Coronary Artery Disease in Korean Adults.
Ji Hoon Kim, Eun Jung Rhee, Eun Suk Choi, Jong Chul Won, Cheol Young Park, Won Young Lee, Ki Won Oh, Byung Jin Kim, Ki Chul Sung, Bum Soo Kim, Jin Ho Kang, Sung Woo Park, Sun Woo Kim, Man Ho Lee, Jung Roe Park
Korean Diabetes J. 2009;33(2):105-112.   Published online April 1, 2009
DOI: https://doi.org/10.4093/kdj.2009.33.2.105
  • 8,049 View
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  • 1 Crossref
AbstractAbstract PDF
BACKGROUND
A recently discovered adipokine, retinol-binding protein-4 (RBP-4), is reportedly associated with insulin resistance and metabolic syndrome. This study was performed to analyze the relationship between serum RBP-4 levels and coronary artery disease (CAD) in Korean adults. METHODS: In 235 subjects (mean age 58 years) in whom coronary artery angiograms were performed due to complaints of chest pain, serum RBP-4 levels were measured by enzyme-linked immunosorbent assay. Coronary artery angiograms were performed in all subjects and the severity of CAD was assessed by the number of stenotic vessels. The presence of metabolic syndrome was defined by AHA/NHLBI criteria with body mass index substituted for waist circumference. RESULTS: Coronary angiogram showed that 101 subjects (43%) had normal coronary vessel, 82 subjects (34.9%) had 1-vessel disease, 31 subjects (13.2%) had 2-vessel disease and 21 subjects (8.9%) had 3-vessel disease. Subjects with coronary artery stenosis showed a higher mean age (60.5 +/- 10.0 years), fasting glucose (123.3 mg +/- 45.0 mg/dL) and lower mean value for high-density lipoprotein cholesterol (HDL-C) level (49.0 +/- 13.2 mg/dL), although serum RBP-4 levels were not significantly different between those with and without CAD. Mean age and fasting glucose level increased significantly as the number of stenotic vessels increased, although serum RBP4 level showed no significant differences among the different groups. Among the metabolic parameters, only serum triglyceride levels showed a significant correlation with serum RBP-4 levels. CONCLUSION: There was no difference in mean serum RBP-4 levels between subjects with or without coronary artery disease in Korean adults. Further studies are warranted to draw a clear conclusion on the effect of RBP-4 on atherosclerosis.

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  • Retinol binding protein 4 levels relate to the presence and severity of coronary artery disease
    Gokay Nar, Sara Sanlialp, Rukiye Nar
    Journal of Medical Biochemistry.2021; 40(4): 384.     CrossRef
Insulin Sensitivity and Insulin Secretion Determined by Homeostasis Model Assessment and Future Risk of Diabetes Mellitus in Korean Men.
Eun Suk Choi, Eun Jung Rhee, Ji Hoon Kim, Jong Chul Won, Cheol Young Park, Won Young Lee, Ki Won Oh, Sung Woo Park, Sun Woo Kim
Korean Diabetes J. 2008;32(6):498-505.   Published online December 1, 2008
DOI: https://doi.org/10.4093/kdj.2008.32.6.498
  • 2,893 View
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  • 17 Crossref
AbstractAbstract PDF
BACKGROUND
Insulin resistance and progressive pancreatic beta cell dysfunction have been identified as the two fundamental features in the type 2 diabetes. Homeostasis model assessment (HOMA), based on plasma levels of fasting glucose and insulin, has been widely validated and applied for quantifying insulin resistance and secretion. This study was performed to assess the predictive value of HOMA indices for future diabetes risk. METHODS: In 14,976 Korean men, in which medical check-up was performed both in 2002 and 2006 in a university hospital health promotion center in Seoul, Korea, prospective assessment for diabetes risk was assessed. At baseline, anthropometric measurements were done and fasting glucose, insulin, lipid profiles were measured. HOMA-insulin resistance (HOMA-IR) and beta cell function (HOMA beta-cell) were calculated from fasting glucose and insulin levels. RESULTS: After 4 years, 286 subjects (1.9%) were newly diagnosed as diabetes mellitus. These patients (mean age 40.3 years) were age-matched with 632 control subjects (mean age 39.8 years) and diabetes risk was assessed with HOMA indices. Among the parameters, body mass index, fasting glucose and HOMA beta-cell were the significant determinants for future diabetes risk. When the subjects were divided into two groups according to the baseline median values of HOMA-IR and HOMA beta-cell, and assessed jointly, those with the low HOMA beta-cell and high HOMA-IR showed the highest risk for future diabetes (RR 39.065, 95% CI 11.736~130.035, P < 0.01). The subjects with low baseline HOMA beta-cell showed higher RR for diabetes than those with high baseline HOMA-IR (4.413 vs. 3.379, P = 0.018, P = 0.051). CONCLUSION: High HOMA-IR and low HOMA beta-cell were associated with the highest risk for future diabetes in this prospective study of Korean male subjects. These data suggest the value of HOMA indices for diabetes risk in epidemiologic studies in Asian subjects.

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  • Effects of a 2-Week Kinect-Based Mixed-Reality Exercise Program on Prediabetes: A Pilot Trial during COVID-19
    So Young Ahn, Si Woo Lee, Hye Jung Shin, Won Jae Lee, Jun Hyeok Kim, Hyun-Jun Kim, Wook Song
    Journal of Obesity & Metabolic Syndrome.2024; 33(1): 54.     CrossRef
  • Case Report of Impaired Fasting Glucose Improved with Korean Medicine Treatment and Dietetic Therapy
    Eun-mi Kim, Ki-tae Kim
    The Journal of Internal Korean Medicine.2021; 42(2): 175.     CrossRef
  • Insulin Resistance Is Associated with Early Gastric Cancer: A Prospective Multicenter Case Control Study
    Hye Jung Kwon, Moo In Park, Seun Ja Park, Won Moon, Sung Eun Kim, Jae Hyun Kim, Youn Jung Choi, Sang Kil Lee
    Gut and Liver.2019; 13(2): 154.     CrossRef
  • Effect of Coenzyme Q10 on Insulin Resistance in Korean Patients with Prediabetes: A Pilot Single-Center, Randomized, Double-Blind, Placebo-Controlled Study
    Ja-Young Yoo, Keun-Sang Yum
    BioMed Research International.2018; 2018: 1.     CrossRef
  • Insulin resistance increases the risk of incident type 2 diabetes mellitus in patients with non‐alcoholic fatty liver disease
    Yuya Seko, Yoshio Sumida, Saiyu Tanaka, Kojiroh Mori, Hiroyoshi Taketani, Hiroshi Ishiba, Tasuku Hara, Akira Okajima, Atsushi Umemura, Taichiro Nishikawa, Kanji Yamaguchi, Michihisa Moriguchi, Kazuyuki Kanemasa, Kohichiroh Yasui, Shunsuke Imai, Keiji Shim
    Hepatology Research.2018;[Epub]     CrossRef
  • The Distribution and Characteristics of Abnormal Findings Regarding Fasting Plasma Glucose and HbA1c - Based on Adults Except for Known Diabetes
    Seyoung Kwon, Youngak Na
    The Korean Journal of Clinical Laboratory Science.2017; 49(3): 239.     CrossRef
  • Association of arsenobetaine with beta-cell function assessed by homeostasis model assessment (HOMA) in nondiabetic Koreans: data from the fourth Korea National Health and Nutrition Examination Survey (KNHANES) 2008-2009
    Kiook Baek, Namhoon Lee, Insung Chung
    Annals of Occupational and Environmental Medicine.2017;[Epub]     CrossRef
  • The Association between Food Group Consumption Patterns and Early Metabolic Syndrome Risk in Non-Diabetic Healthy People
    Rimkyo Yeo, So Ra Yoon, Oh Yoen Kim
    Clinical Nutrition Research.2017; 6(3): 172.     CrossRef
  • Glycemic Effects of Rebaudioside A and Erythritol in People with Glucose Intolerance
    Dong Hee Shin, Ji Hye Lee, Myung Shin Kang, Tae Hoon Kim, Su Jin Jeong, Chong Hwa Kim, Sang Soo Kim, In Joo Kim
    Diabetes & Metabolism Journal.2016; 40(4): 283.     CrossRef
  • Comparison of the Usefulness of the Updated Homeostasis Model Assessment (HOMA2) with the Original HOMA1 in the Prediction of Type 2 Diabetes Mellitus in Koreans
    Young Seok Song, You-Cheol Hwang, Hong-Yup Ahn, Cheol-Young Park
    Diabetes & Metabolism Journal.2016; 40(4): 318.     CrossRef
  • The effects of Atractylodes japonica Koidz. on type 2 diabetic rats
    Dae Hoon Lee, Jae Min Han, Woong Mo Yang
    Journal of Korean Medicine.2015; 36(1): 75.     CrossRef
  • Normal Glucose Tolerance with a High 1-Hour Postload Plasma Glucose Level Exhibits Decreased β-Cell Function Similar to Impaired Glucose Tolerance
    Tae Jung Oh, Se Hee Min, Chang Ho Ahn, Eun Ky Kim, Soo Heon Kwak, Hye Seung Jung, Kyong Soo Park, Young Min Cho
    Diabetes & Metabolism Journal.2015; 39(2): 147.     CrossRef
  • Relative contributions of insulin resistance and β‐cell dysfunction to the development of Type 2 diabetes in Koreans
    C.‐H. Kim, H.‐K. Kim, E. H. Kim, S. J. Bae, J.‐Y. Park
    Diabetic Medicine.2013; 30(9): 1075.     CrossRef
  • The Relationship between β-cell Function and Nutrient Intakes in Korean Adult - Using 4thKorea National Health and Nutrition Examination Survey 2009 -
    You Mi Lee, Hye Kyung Chung, Heejin Kimm, Sun Ha Jee
    Korean Journal of Community Nutrition.2012; 17(2): 243.     CrossRef
  • A Case of Complete Agenesis of the Dorsal Pancreas in a Patient with Newly Diagnosed Diabetes Mellitus
    Dong Pil Kim, Kang Seo Park, Dong Sun Kim, Bong Suk Ko, Ji Hae Lee, Jae Hyuk Lee, Jong Ho Shin, Byung Jun Kim, Hyun Jin Kim
    Journal of Korean Endocrine Society.2010; 25(1): 78.     CrossRef
  • Insulin Sensitivity and Insulin Secretion Determined by Homeostasis Model Assessment and Future Risk of Diabetes Mellitus in Korean Men (Korean Diabetes J 32(6):498-505, 2008)
    Sang Yong Kim
    Korean Diabetes Journal.2009; 33(1): 73.     CrossRef
  • Insulin Sensitivity and Insulin Secretion Determined by Homeostasis Model Assessment and Future Risk of Diabetes Mellitus in Korean Men (Korean Diabetes J 32(6):498-505, 2008)
    Eun-Suk Choi, Eun-Jung Rhee
    Korean Diabetes Journal.2009; 33(1): 75.     CrossRef
Comparison of the Predictability of Cardiovascular Disease Risk According to Different Metabolic Syndrome Criteria of American Heart Association/National Heart, Lung, and Blood Institute and International Diabetes Federation in Korean Men.
Do Young Lee, Eun Jung Rhee, Eun Suk Choi, Ji Hoon Kim, Jong Chul Won, Cheol Young Park, Won Young Lee, Ki Won Oh, Sung Woo Park, Sun Woo Kim
Korean Diabetes J. 2008;32(4):317-327.   Published online August 1, 2008
DOI: https://doi.org/10.4093/kdj.2008.32.4.317
  • 2,914 View
  • 22 Download
  • 7 Crossref
AbstractAbstract PDF
BACKGROUND
We compared the prevalences of two criteria of metabolic syndrome, that is, American Heart Association/National Heart, Lung, and Blood Institute (AHA/NHLBI) and International Diabetes Federation (IDF), in Korean male adults and compared the predictability of insulin resistance and future cardiovascular diseases using Framingham Risk Score. METHODS: In total 23,467 male adults (mean age 43.3 years) who participated in medical check-up in 2005, the prevalences of metabolic syndrome according to AHA/NHLBI and IDF criteria and the presence of insulin resistance, defined by the highest quartile of Homeostasis Model Assessment of insulin resistance index (HOMA-IR), were compared. The relative risk (calculated risk/average risk) for 10-year risk for coronary artery disease (CHD) assessed by Framingham Risk Score were compared. RESULTS: 5.8% of the subjects had diabetes mellitus. 20.7% and 13.2%of the subjects had metabolic syndrome defined by AHA/NHLBI and IDF criteria, and the two criteria showed high agreement with kappa value of 0.737 (P < 0.01). More subjects in IDF-defined group had insulin resistance compared with AHA/NHLBI definition (59.8 vs. 54%, P < 0.01). The odds ratio for increased relative risk (> 1.0) for 10-year CHD were higher in AHA/NHLBI-defined subjects compared with IDF-defined subject (3.295 vs. 3.082). The Kappa values for the analysis of agreement between each criteria and prediction of insulin resistance or cardiovascular disease risk, were too low for comparison. CONCLUSION: In Korean males, the prevalence for metabolic syndrome defined by AHA/NHLBI criteria was higher than those defined by IDF criteria. IDF criteria detected more subjects with insulin resistance, but didn't have better predictability for CHD compared with AHA/NHLBI criteria.

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  • Attention Aware Deep Learning Approaches for an Efficient Stress Classification Model
    Muhammad Zulqarnain, Habib Shah, Rozaida Ghazali, Omar Alqahtani, Rubab Sheikh, Muhammad Asadullah
    Brain Sciences.2023; 13(7): 994.     CrossRef
  • Statistics and Deep Belief Network-Based Cardiovascular Risk Prediction
    Jaekwon Kim, Ungu Kang, Youngho Lee
    Healthcare Informatics Research.2017; 23(3): 169.     CrossRef
  • Relationship between Abdominal Fat Area Measured by Screening Abdominal Fat CT and Metabolic Syndrome in Asymptomatic Korean Individuals
    Dae Woong Park, Noh Hyuck Park, Ji Yeon Park, Seon-Jeong Kim
    Journal of the Korean Society of Radiology.2017; 77(1): 1.     CrossRef
  • Data-Mining-Based Coronary Heart Disease Risk Prediction Model Using Fuzzy Logic and Decision Tree
    Jaekwon Kim, Jongsik Lee, Youngho Lee
    Healthcare Informatics Research.2015; 21(3): 167.     CrossRef
  • Implication of high‐body‐fat percentage on cardiometabolic risk in middle‐aged, healthy, normal‐weight adults
    Ji Young Kim, Sang‐Hwan Han, Bong‐Min Yang
    Obesity.2013; 21(8): 1571.     CrossRef
  • Cardio-Metabolic Features of Type 2 Diabetes Subjects Discordant in the Diagnosis of Metabolic Syndrome
    Sa Rah Lee, Ying Han, Ja Won Kim, Ja Young Park, Ji Min Kim, Sunghwan Suh, Mi-Kyoung Park, Hye-Jeong Lee, Duk Kyu Kim
    Diabetes & Metabolism Journal.2012; 36(5): 357.     CrossRef
  • Comparison of Cardiovascular Health Status and Health Behaviors in Korean Women based on Household Income
    Young-Joo Park, Nah-Mee Shin, Ji-Won Yoon, Jiwon Choi, Sook-Ja Lee
    Journal of Korean Academy of Nursing.2010; 40(6): 831.     CrossRef
Type 2 Diabetes Mellitus and Retinol-Binding Protein 4.
Won Young Lee, Eun Jung Rhee
Korean Diabetes J. 2008;32(4):295-300.   Published online August 1, 2008
DOI: https://doi.org/10.4093/kdj.2008.32.4.295
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AbstractAbstract PDF
New function of retinol-binding protein 4 (RBP4) was identified in addition to the traditional role as a vitamin A transport protein. In the state of insulin resistance even before the onset of type 2 DM, GLUT4 expression by adipocytes is decreased, but those by skeletal muscle is well preserved. Decreased adipocyte GLUT4 causes expression of RBP4 by adipocytes, thus increasing serum RBP4 levels. Increased RBP4 induces insulin resistance on liver and skeletal muscle, thus acting as a diabetogenic signal from adipose tissue. Glucose disposal rate examined by clamp study is inversely related with serum RBP4 levels in humans. In this section, recent works on the metabolism and function of RBP4 were summarized.

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  • The Effects of Marathon Running on Retinol Binding Protein 4 and C-reactive Protein Levels in Healthy Middle-aged Korean Men
    Jisuk Chae, Sungmin Kim, Junga Lee, Justin Y. Jeon
    The Korean Journal of Obesity.2014; 23(3): 203.     CrossRef
The Association of Pro12Ala Polymorphism in PPAR-gamma Gene with Coronary Artery Disease in Korean Subjects.
Chang Hee Kwon, Eun Jung Rhee, Se Yeon Kim, Eun Ran Kim, Chang Uk Chon, Chan Hee Jung, Ji Ho Yun, Byung Jin Kim, Ki Chul Sung, Bum Su Kim, Won Young Lee, Ki Won Oh, Jin Ho Kang, Sun Woo Kim, Man Ho Lee, Jung Roe Park
Korean Diabetes J. 2006;30(2):122-129.   Published online March 1, 2006
DOI: https://doi.org/10.4093/jkda.2006.30.2.122
  • 2,452 View
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AbstractAbstract PDF
BACKGROUND
PPAR-gamma, a member of nuclear family, which is involved in the differentiation of adipose tissue, is reported to be associated in the pathogenesis of type 2 diabetes mellitus, insulin resistance and atherosclerosis. We conducted a research to see whether the prevalence of coronary artery disease is associated with Pro12Ala polymorphism in exon B of PPAR-gamma in Korean adults. METHODS: The study was conducted in 161 subjects (97 males, 64 females, mean age 57 year old) who underwent coronary angiogram due to chest pain. We assessed cardiovascular risk factors in all subjects, such as blood pressure, body mass index (BMI), fasting blood sugar and serum lipid profiles. Subjects were divided into four groups as normal, 1-vessel, 2-vessel and 3-vessel disease according to the number of stenosed coronary arteries. Genotypings of Pro12Ala polymorphism were done with Real-time polymerase chain reaction. RESULTS: Allelic frequency for proline was 0.957 and 0.043 for alanine, and they were in compliance with Hardy-Weinberg equilibrium (P = 0.85). 79 subjects (43.5%) had normal coronary artery, 52 subjects (31%), 1-vessel disease, 24 subjects (14.9%), 2-vessel disease and 15 subjects (9.3%), 3-vessel disease. When the cardiovascular risk factors were compared among these four groups, there were no meaningful differences except the age and high-density lipoprotein cholesterol levels, which were lost after adjustment for age and BMI. There were no significant differences in the prevalence or severity of coronary artery diseases according to the different genotypes of Pro12Ala polymorphism. CONCLUSIONS: There was no significantassociation between Pro12Ala polymorphism in exon B of PPAR-gamma and prevalence or severity of coronary artery disease in Korean adults. It is considered that further studies on the correlation between Pro12Ala polymorphism and coronary artery disease should be carried out in larger Korean population in the future
The Relationship Between the C1818T Polymorphism in Exon 4 of the klotho Gene with Fasting Glucose and Insulin Levels in Korean Women.
Ki Won Oh, Eun Joo Yun, Eun Jung Rhee, Won Young Lee, Ki Hyun Baek, Kun Ho Yoon, Moo Il Kang, Seong Gyun Kim, Cheol Young Park, Sung Hee Ihm, Moon Gi Choi, Hyung Joon Yoo, Sung Woo Park
Korean Diabetes J. 2005;29(3):189-197.   Published online May 1, 2005
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AbstractAbstract PDF
BACKGROUND
A novel gene, termed klotho has been identified as a suppressor of several aging phenotypes, and a genetic defect of klotho in mice resulted in a syndrome resembling human aging, i.e., a short lifespan, infertility, arteriosclerosis, skin atrophy, osteoporosis, and pulmonary emphysema. Since klotho mice also showed an abnormal glucose metabolism, we investigated the relationship between the C1818T polymorphism in exon 4 of the klotho gene and fasting glucose and insulin resistance in Korean women to observe its contribution to glucose metabolism. METHODS: The weight, height, blood pressure, fasting blood glucose, insulin, and lipid profiles were measured in 241 women(mean age, 51.2+/-7.0yr) by using the standard methods. Homeostasis model assessment(HOMA)-insulin resistance(IR), the quantitative insulin sensitivity check index(QUICKI) and HOMAbeta-cell were calculated. The genotyping of the C1818T polymorphism in exon 4 of the klotho gene was performed by allelic discrimination with using a 5' nuclease polymerase chain reaction assay. RESULTS: The allele frequencies were 0.805 for the C allele and 0.195 for the T allele, and they were in Hardy-Weinberg equilibrium(P=0.290). The mean fasting blood glucose(P= 0.005) and HOMA IR(P=0.035) were significantly higher in the T allele carriers compared with the non-carriers. After adjustment was made for age, fasting blood glucose was persistently significant(P=0.015), but the HOMA-IR became marginally significant(P=0.063). In the premenopausal women, the T allele carriers showed a higher mean fasting blood glucose(P=0.038), insulin(P=0.024), HOMA-IR(P=0.010), total cholesterol(P=0.039), and triglyceride levels(P=0.031) than in the non-carriers. After adjustment was made for age, the fasting blood glucose, insulin, HOMA-IR and triglyceride were persistently significant(P= 0.043, P=0.026, P=0.011, P=0.040). Also, the QUICKI, total cholesterol and low-density ilpo-protein cholesterol became marginally significant(P=0.073, P=0.061, P=0.098). For the postmenopausal women, the T allele carriers showed a tendency for higher mean fasting blood glucose levels(P=0.065) and lower HOMA beta-cell levels(P=0.085) than in the noncarriers. These differences became non-significant after adjustment was made for age. CONCLUSION: We observed that the C1818T polymorphism in exon 4 of the klotho gene was partly associated with glucose metabolism in Korean women. Also, these data suggest that the C1818T polymorphism is related with some cardiovascular risk factors in Korean women. The mechanism linking this gene with glucose metabolism warrants further study
The Association of Interleukin-6 Gene Promoter Region Polymorphism G174C with Insulin Resistance and Metabolic Syndrome in Korean Women.
Eun Jung Rhee, Won Young Lee, Se Yeon Kim, Eun Sook Oh, Ki Hyun Baek, Ki Won Oh, Moo Il Kang, Sun Woo Kim
Korean Diabetes J. 2005;29(3):181-188.   Published online May 1, 2005
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BACKGROUND
Interleukin(IL)-6 is a cytokine that is produced from immune cells and adipose tissue. It is thought to be a factor to explain the link between insulin resistance and inflammation, and it is also thought to be involved in glucose metabolism and lipid metabolism. We observed the frequency of the G174C polymorphism in the IL-6 gene promoter region in Korean women and we investigated the association of fasting glucose, insulin resistance indices and metabolic syndrome. METHODS: Measurements of the blood pressure, body fat, fasting glucose, insulin, lipid profiles and anthropometric measurements were done for 268 Korean women(mean age 51.4yrs, range 37~73yrs). Homeostasis model assessement(HOMA) and the quantitative insulin sensitivity check index(QUICKI) were calculated and the presence of metabolic syndrome was assessed according to ATP III criteria. Genotyping was done with the PCRRFLP method on the blood samples of the participants. RESULTS: The allele frequencies were 0.965 for the G allele and 0.035 for the C allele, and they were in Hardy-Weinberg equilibrium(P=0.50). The fasting insulin level and HOMA were significantly higher and the QUICKI was significantly lower in the C allele carriers compared with non-carriers. Although the prevalence of metabolic syndrome was not significantly different according to the different genotypes, among the individual components, the prevalence of hypertriglyceridemia was significantly higher in the C allele carriers compared with the non-carriers. There were no differences in the prevalence of normoglycemia, fasting hyperglycemia and provisional diabetes according to the different genotypes. CONCLUSION: The G174C polymorphism in The IL-6 promoter region was not frequently observed in Korean women. The insulin resistance indices were higher in the C allele carriers compared with the non-carriers. Although the prevalence of metabolic syndrome was not associated with the polymorphism, the prevalence of hypertriglyceridemia was higher in The C allele carriers, suggesting that it is possibile for candidate gene of insulin resistance
Left Ventricular Mass Index Increases in Proportion to the Urinary Microalbumin Excretion Rate in Type 2 Diabetes.
Seung Ha Park, Won Young Lee, Sun Woo Kim
Korean Diabetes J. 2002;26(6):500-508.   Published online December 1, 2002
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BACKGROUND
In type 2 diabetes, microalbuminuria is an early marker of the atherosclerotic process and of endothelial dysfunction. It has also been shown to be related with the prevalence and morbidity of renal and cardiovascular diseases, and is associated with other risk factors of vascular damage. Left ventricular hypertrophy (LVH) has long been established as a major independent marker of future cardiovascular morbidity and mortality, depending on the body mass and blood pressure load. In order to clarify any association between the urinary microalbumin excretion rate (UAER) and the left ventricular mass index (LVMI), which may explain the observed poor prognosis in these patients, we analysed the clinical characteristics and laboratory findings data of type 2 diabetes. METHODS: We conducted a cross-sectional study of 48 patients with type 2 diabetes, who had been echocardiographically assessed and their 24-h urine collection analyzed for UAER, and the patients with clinical evidence of heart and renal diseases were excluded. The patients were divided into two groups according to their mean LVMI value (Low LVMI group: LVMI <97 g/m2, n=26; High LVMI group: LVMI >or=97 g/m2, n=22). RESULTS: The UAER, and systolic and diastolic blood pressures, were higher in the High LVMI group, but age, sex, body mass index (BMI) and duration of diabetes were similar in both group. The correlation of UAER and systolic blood pressure with LVMI remained significant, even after a multiple regression analysis (p=0.042, p=0.01 respectively). CONCLUSION: The significant relationship between the UAER and LVMI was independent of blood pressure, age, sex, BMI, duration of diabetes and other cardiovascular risk factors in type 2 diabetes. Therefore, an increased UAER may play an important role in the development of LVH.
Relationship between C-peptide, Metabolic Control and Chronic Complications in Type 2 Diabetes.
Jeung Mook Kang, Won Young Lee, Ji Youn Kim, Jung Won Yun, Sun Woo Kim
Korean Diabetes J. 2002;26(6):490-499.   Published online December 1, 2002
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BACKGROUND
Type 2 diabetes mellitus is a heterogeneous disease characterized by variable degrees of insulin resistance, impaired insulin secretion and increased glucose production. As the decline of beta-cell function in type 2 diabetes is very slow, the relationship between the insulin secretory capacity, the degree of metabolic control and chronic complications is still unclear. The determination of plasma C-peptide allows for the assessment of the endogenous insulin production, even in the presence of exogenous insulin administration. The aim of this study was to evaluate the relationship between the serum C-peptide level and metabolic parameters, and the complications in type 2 diabetes. METHOD: The clinical characteristics and laboratory findings, such as lipid profile, fasting plasma glucose, HbA1C and uric acid, were evaluated, and their relationships with chronic complications analyzed. We measured the serum C-peptide level by radioimmunoassay (RIA) in 384 type 2 diabetes mellitus patients. The patients were divided into quartile groups according to their fasting C-peptide levels (quartile 1: <1.73 ng/mL, n=95; quartile 2:>or=1.73 ng/mL and <2.38 ng/mL, n=95; quartile 3:>or=2.38 ng/mL and <3.18 ng/mL, n=98; quartile 4:>or=3.18 ng/mL, n=96). RESULTS: Patients in the lowest C-peptide quartile showed significantly higher durations of diabetes, HbA1C and postprandial plasma glucose values, and HDL-cholesterol. Conversely, the BMI, systolic blood pressure, total cholesterol and triglyceride were significantly higher in the highest C-peptide quartile. The prevalence of diabetic retinopathy and urinary protein excretion were higher in lowest quartile, and the diastolic blood pressure was highest in the upper quartile, but these were not statistically significant. The associations between C-peptide, and the duration of diabetes, BMI, total cholesterol, triglyceride, HDL cholesterol, postprandial 2 plasma glucose and systolic blood pressure remained significant, even after multiple adjustments. CONCLUSION: In type 2 diabetes, higher C-peptide levels are associated with a component of metabolic syndrome and lower C-peptide levels due to decreased cell reserves, associated with hyperglycemia and microvascular complications
The Serial Changes of Blood Glucose and Lipid Levels Following Allogeneic Bone Marrow Transplantation and Related Clinical Factors.
Won Young Lee, Moo Il Kang, Eun Sook Oh, Ki Won Oh, Hyun Shik Son, Kun Ho Yoon, Bong Yun Cha, Kwang Woo Lee, Ho Young Son, Sung Koo Kang, Wan Sik Shin, Woo Sung Min, Choon Choo Kim
Korean Diabetes J. 2000;24(6):689-698.   Published online January 1, 2001
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BACKGROUND
In bone marrow transplantation (BMT), recipients are usually younger and immunosuppressants are open used in shorter period than in solid organ transplantation. Therefore, there might be a difference in glucose and lipid metabolism between BMT and solid organ transplantation. However, the serial changes of metabolic parameters following BMT have not been studied. There fore, the aim of this study is to investigate the serial changes of blood glucose, lipids and the putative factors that are related with these changes after BMT. METHODS: We have prospectively investigated 43 patients who underwent allogeneic BMT . Fasting plasma glucose (FPG), total cholesterol, triglyceride and high-density lipoprotein (HDL) were measured before BMT, and at 1, 2, 3, 4, 12 weeks and 6 months after BMT. The serial changes of these metabolic parameters according to clinical factors including type of BMT, mean daily steroid dosage, and occurrence of graft versus host disease (GVHD) were examined. RESULTS: 1. Mean FPG level increased during 4 weeks after BMT and remained above basal value at post-transplant 6 months. Total Cholesterol level was increased during initial 4 weeks after BMT and was above basal value at post-BMT of 3 and 6 months. Triglyceride level was progressively increased during initial 4 weeks after BMT, but returned to basal value thereafter. HDL-cholesterol level was significantly decreased during initial 4 weeks after BMT, but returned to basal value thereafter. 2. Patients with FPG above 126 mg/dL at post-transplant 6 months were 7 out of 43 patients (16%). Comparing patients with FPG above 126 mg/dL and the other patients, the former received larger amounts of daily steroid and had lower HDL-cholesterol level. 3. The changes of metabolic parameters were different according to type of BMT, steroid dose, and occurrence of GVHD. CONCLUSION: Although there was increase of FPG, TC, TG and decrease of HDL-C during initial 4 weeks after BMT, these metabolic changes recovered slowly thereafter. Immunosuppressants are thought to be associated with these changes. Further observation will be needed for the long-term effect of BMT on metabolic changes.
The Effect of Increased Beta Cell Mass on Glucose Tolerance in Rat.
Eun Sook Oh, Kun Ho Yoon, Sun Hee Seo, Sook Young Lee, Seung Hyun Ko, Won Young Lee, Sung Rae Kim, Moo Il Kang, Bong Yon Cha, Kwang Woo Lee, Ho Young Son, Sung Goo Kang
Korean Diabetes J. 2000;24(6):629-640.   Published online January 1, 2001
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BACKGROUND
The aim of the present study is to evaluate the effect of increased beta cell mass by continuous 96-hour 50% glucose infusion on glucose tolerance in insulin resistance state induced by high fat diet in normal Sprague-Dawley rats. METHODS: The adult Sprague-Dawley rats weighing 200-250 gm were infused with 50% glucose or 0.45% saline via external jugular vein catheter for 96 hours. The both groups of rats were then randomly stratified into the two subgroups, and fed either high fat diet (54% of energy from fat) or normal rat chow (8.6% of energy from fat) for 4 weeks. On day 28, blood was collected for measuring the serum concentration of insulin, and oral glucose tolerance test (2 gm/kg body weight) was performed after overnight fasting. The beta cell mass was counted with the morphometric point-counting technique of Weibel. RESULTS: After the 96 hour infusion, the percentage of beta cell mass was significantly increased in glucose-infused rats when compared to the saline-infused group (p=0.03) and maintained up to day 28. Body weight gains were significantly greater in glucose infused rats than those of saline infused group (Increased value of weight : 142.9+/-15.2 g in glucose infused rats vs 125.3+/-21.1 g in saline infused rats, p=0.01). In the saline infusion-high fat diet group, the number of rats with impaired glucose tolerance was higher than those of other group (p<0.005). The glucose values at 90 minute and 120 minute were higher in saline infusion-high fat diet group than in glucose infusion-high fat diet group (p< 0.05). CONCLUSION: Our findings suggest that the increased beta cell mass has a favorable effect on glucose tolerance in insulin resistance state which were evoked by high fat diet.
Risk Factors of Posttransplant Diabetes Mellitus after Allogeneic Bone Marrow Transplantation.
Ki Won Oh, Won Young Lee, Moo Il Kang, Hyun Shik Son, Kun Ho Yoon, Bong Yun Cha, Wan Sik Shin, Kwang Woo Lee, Ho Young Son, Sung Koo Kang, Woo Sung Min, Choon Choo Kim
Korean Diabetes J. 2000;24(2):225-234.   Published online January 1, 2001
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BACKGROUND
Although increasing number of patients are survived after organ transplantation, morbidity and mortality due to cardiovascular disease is thought to be the key risk factor for the long-term tranplant survivors. Many studies have shown that posttransplant diabetes mellitus, dyslipidemia, and hypsrtension are major causes of accerelated atherosclerosis after organ transplantation. Immunosuppressants, rejection, family history of DM, certain HLA phenotypes, pretransplant age and fasting glucose concentration are suggested as etiopathogenic factors of posttransplant diabetes mellitus (PTDM) after solid organ transplantation, while the risk factors of PTDM after bone marrow transplantation (BMT) is unknown. The aim of our study to investigate the clinical characteristics and possible risk factors for PTDM after BMT. METHODS: Age, male to female ratio, body mass index, mean daily steroid dosage, mean daily cyclosporin dosage, incidence of graft versus host disease(GVHD), incidence of cytomegalovirus (CMV) disease, fasting plasma glucose concentra-tion, serum lipid profiles, and HLA phenotypes were retrospectively examined in 15 PTDM patients and 68 non-diabetic patients after allogeneic BMT. RESULTS: 1. Among 490 allogeneic BMT, PTDM developed in 15 patiants (3.1%). The mean duration from BMT to onset of PTDM was 26,6+/-33,9 days. 2. When compared between the PTDM and non-diabetic patients, mean daily steroid dosage, incidence of GVHD, and incidence of CMV disease were significantly different. 3, HLA phenotypes, HLA-DR52 and DR53, were more frequently observed only in PTDM patients. 4. At the onset of PTDM, we observed that fasting plasma glucose, total cholesterol, and LDL-cholesterol concentration were significantly elevated in pre-BMT state. CONCLUSION: We conclude that posttransplant diabetes mellitus after BMT, frequently develops in patients with a predisposition of high-dose steroid, GVHD, HLA-DR52 and DR53 phenotypes. This study suggested that high-dose steroid therapy, mainly due to GVHD, might be the critical factor in the onset of PTDM after allogeneic BMT and that the risk may be affected by HLA-DR52 and DR53 phenotypes.
Methylenetetrahydrofolate Reductase Polymorphism in Korean Type 2 Diabetic Patients with Macroangiopathy.
Ki Won Oh, Won Young Lee, Yoo Bae Ahn, Ki Ho Song, Soon Jib Yoo, Kun Ho Yoon, Moo Il Kang, Bong Yun Cha, Kwang Woo Lee, Ho Young Son, Sung Koo Kang
Korean Diabetes J. 1999;23(5):625-634.   Published online January 1, 2001
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BACKGROUND
Hyperhomocysteinemia is an inde-pendent risk factor for cardiovascular disease. Recently, a mutation (677CT) was identified in the methylenetetrahydrofolate reductase (MTHFR) gene, leading to the substitution of valine (V) for alanine (A). This mutation causes a reduced folate-dependent enzyme activity which leads to increased homocysteine. In this study, we examined the association between the V allele of the methylenetetrahydrofolate reductase gene and macroangiopathy in Korean patients with type 2 diabetes mellitus. METHODS: In 54 type 2 diabetic patients with macroangiopathy and 198 normal subjects, the MTHFR genotypes were analyzed by polymerase chain reaction (PCR), followed by Hinfl digestion. To confirm the detection of the MTHFR polymorphism by the PCR-restriction fragment length polymorphism (RFLP) analysis, DNA Sequencing was performed on the PCR products. RESULT: The allele frequency of the V mutation was slightly higher in the patients than in the normal subjects, but that was statistically not significant. The crude ORs and 95% CIs for the allele frequency of the V mutation were 1.16 (0.76~1.79). Genotype frequencies were 35.9% for AA, 48.4% for AV, and 15.7% for VV in the normal subjects. And they were 31.5% for AA, 50.0 % for AU, and 18.5 % for VV in the patients. The crude ORs and 95% CIs for the VV genotype were 1.22 (0.56~2.67). In multiple regressian model, the VV genotype was not associated with diabetic macroangiopathy. CONCLUSION: Although, the frequencies of VV genotype in Korean normals (=16%) are higher than those of other thical populations (=12%), this mutation is not associated with macroangiopathy in type 2 diabetic patients. But, our sample size was too small and larger cohort studies will be needed to confirm the effect of MTHFR polymorphism on the development of macroangiopathy in diabetic patients.

Diabetes Metab J : Diabetes & Metabolism Journal
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