Diabetes & Metabolism Journal

Ho Yeon Chung (Chung HY)

6 Articles

Metabolic Risk/Epidemiology
Trends in the Prevalence of Obesity and Its Phenotypes Based on the Korea National Health and Nutrition Examination Survey from 2007 to 2017 in Korea: Sang Ouk Chin, You-Cheol Hwang, Hong-Yup Ahn, Ji Eun Jun, In-Kyung Jeong, Kyu Jeung Ahn, Ho Yeon Chung; Diabetes Metab J. 2022;46(5):808-812. Published online March 8, 2022; DOI: https://doi.org/10.4093/dmj.2021.0226

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This study used data from the Korea National Health and Nutrition Examination Survey IV–VII from 2007 to identify the prevalence of obesity and its phenotypes (metabolically unhealthy obesity [MUO] and metabolically healthy obesity [MHO]) and their secular changes. The prevalence of obesity in Korea increased with significant secular changes observed (β=0.326, P trend <0.01) between 2007 and 2017, and especially in men (β=0.682, P trend <0.001) but not in women. The changes in the prevalence of obesity during the study period were different between men and women (P=0.001). The prevalence of MUO significantly increased only in men (β=0.565, P trend <0.01), while that of MHO increased only in women (β=0.179, P<0.05), especially in the younger age group (β=0.308, P<0.01).

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Link between obesity and growth in children and adolescents
Hae Sang Lee
Journal of the Korean Medical Association.2024; 67(5): 330. CrossRef
Hormonal Gut–Brain Signaling for the Treatment of Obesity
Eun Roh, Kyung Mook Choi
International Journal of Molecular Sciences.2023; 24(4): 3384. CrossRef
Differences of Regional Fat Distribution Measured by Magnetic Resonance Imaging According to Obese Phenotype in Koreans
Ha-Neul Choi, Hyunjung Lim, Young-Seol Kim, Sang-Youl Rhee, Jung-Eun Yim
Metabolic Syndrome and Related Disorders.2022; 20(10): 551. CrossRef

Metabolic Risk/Epidemiology
Increased Visit-to-Visit Liver Enzyme Variability Is Associated with Incident Diabetes: A Community-Based 12-Year Prospective Cohort Study: Kyuhoon Bang, Ji Eun Jun, In-Kyung Jeong, Kyu Jeung Ahn, Ho Yeon Chung, You-Cheol Hwang; Diabetes Metab J. 2021;45(6):890-898. Published online March 17, 2021; DOI: https://doi.org/10.4093/dmj.2020.0208

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Graphical Abstract Abstract PDF Supplementary Material PubReader ePub: Background
Fatty liver and/or increased liver enzyme values have been reported to be associated with incident diabetes. We sought to determine whether increased visit-to-visit liver enzyme variability is associated with incident diabetes.
Methods
Study participants were recruited from the Korean Genome and Epidemiologic Study (KoGES). A total of 4,151 people aged 40 to 69 years was recruited and tested every 2 years for up to 12 years. Visit-to-visit aspartate aminotransferase (AST) and alanine aminotransferase (ALT) variability was evaluated in first the 6-year period through the use of various variability measurements: standard deviation (SD), average successive variability, coefficient of variation (CV), and variation independent of mean (VIM). Oral glucose tolerance test was performed at every visit.
Results
During the 6-year follow‐up appointments, 13.0% (538/4,151) of people developed incident diabetes. Visit-to-visit AST variability was associated with an increased risk of diabetes independent of conventional risk factors for diabetes (hazard ratio per 1-SD increment [95% confidence interval]: 1.06 [1.00 to 1.11], 1.12 [1.04 to 1.21], and 1.13 [1.04 to 1.22] for SD, CV, and VIM, respectively; all P<0.05); however, no such associations were observed in the visit-to-visit ALT variability. According to alcohol consumption status, both AST and ALT variability were independent predictors for incident diabetes in subjects with heavy alcohol consumption; however, neither AST nor ALT variability was associated with diabetes risk in subjects who did not drink alcohol heavily.
Conclusion
Visit-to-visit liver enzyme variability is an independent predictor of incident diabetes. Such association was more evident in those who consumed significant amounts of alcohol.

Clinical Diabetes & Therapeutics
Comparison of the Efficacy of Rosuvastatin Monotherapy 20 mg with Rosuvastatin 5 mg and Ezetimibe 10 mg Combination Therapy on Lipid Parameters in Patients with Type 2 Diabetes Mellitus: You-Cheol Hwang, Ji Eun Jun, In-Kyung Jeong, Kyu Jeung Ahn, Ho Yeon Chung; Diabetes Metab J. 2019;43(5):582-589. Published online January 16, 2019; DOI: https://doi.org/10.4093/dmj.2018.0124

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Background

The apolipoprotein B/A1 (apoB/A1) ratio is a stronger predictor of future cardiovascular disease than is the level of conventional lipids. Statin and ezetimibe combination therapy have shown additional cardioprotective effects over statin monotherapy.

Methods

This was a single-center, randomized, open-label, active-controlled study in Korea. A total of 36 patients with type 2 diabetes mellitus were randomized to either rosuvastatin monotherapy (20 mg/day, n=20) or rosuvastatin/ezetimibe (5 mg/10 mg/day, n=16) combination therapy for 6 weeks.

Results

After the 6-week treatment, low density lipoprotein cholesterol (LDL-C) and apoB reduction were comparable between the two groups (−94.3±15.4 and −62.0±20.9 mg/dL in the rosuvastatin group, −89.9±22.7 and −66.8±21.6 mg/dL in the rosuvastatin/ezetimibe group, P=0.54 and P=0.86, respectively). In addition, change in apoB/A1 ratio (−0.44±0.16 in the rosuvastatin group and −0.47±0.25 in the rosuvastatin/ezetimibe group, P=0.58) did not differ between the two groups. On the other hand, triglyceride and free fatty acid (FFA) reductions were greater in the rosuvastatin/ezetimibe group than in the rosuvastatin group (−10.5 mg/dL [interquartile range (IQR), −37.5 to 29.5] and 0.0 µEq/L [IQR, −136.8 to 146.0] in the rosuvastatin group, −49.5 mg/dL [IQR, −108.5 to −27.5] and −170.5 µEq/L [IQR, −353.0 to 0.8] in the rosuvastatin/ezetimibe group, P=0.010 and P=0.049, respectively). Both treatments were generally well tolerated, and there were no differences in muscle or liver enzyme elevation.

Conclusion

A 6-week combination therapy of low-dose rosuvastatin and ezetimibe showed LDL-C, apoB, and apoB/A1 ratio reduction comparable to that of high-dose rosuvastatin monotherapy in patients with type 2 diabetes mellitus. Triglyceride and FFA reductions were greater with the combination therapy than with rosuvastatin monotherapy.

Citations

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Moderate-Intensity Rosuvastatin/Ezetimibe Combination versus Quadruple-Dose Rosuvastatin Monotherapy: A Meta-Analysis and Systemic Review
Yura Kang, Jung Mi Park, Sang-Hak Lee
Yonsei Medical Journal.2024; 65(1): 19. CrossRef
A Comparison of Rosuvastatin Monotherapy and Rosuvastatin Plus Ezetimibe Combination Therapy in Patients With Type 2 Diabetes: A Meta-Analysis of Randomized Controlled Trials
Samuel K Dadzie, Godfrey Tabowei, Mandeep Kaur, Saeed Ahmed, Aayushi Thakur, Khaldoun Khreis, Monika Bai, Adil Amin
Cureus.2024;[Epub] CrossRef
Efficacy and safety of double-dose statin monotherapy versus moderate-intensity statin combined with ezetimibe dual therapy in diabetic patients: a systematic review and meta-analysis of randomized controlled trials
Aman Goyal, Muhammad Daoud Tariq, Hritvik Jain, Abhigan Babu Shrestha, Laveeza Fatima, Romana Riyaz, Hritik Raj Yadav, Darsh Safi, Abdul Qahar K. Yasinzai, Rozi Khan, Amir Humza Sohail, Mohamed Daoud, Abu Baker Sheikh
Cardiovascular Endocrinology & Metabolism.2024;[Epub] CrossRef
Macadamia (Macadamia integrifolia) Oil Prevents High-Fat Diet-Induced Lipid Accumulation and Oxidative Stress by Activating the AMPK/Nrf2 Pathway
Ming Zhang, Yuhan Zhang, Lingdong Li, Changbin Wei, Taotao Dai, Ya Li, Xixiang Shuai, Liqing Du
Foods.2024; 13(22): 3672. CrossRef
Combination Therapy of Ezetimibe and Rosuvastatin for Dyslipidemia: Current Insights
Maya R Chilbert, Dylan VanDuyn, Sara Salah, Collin M Clark, Qing Ma
Drug Design, Development and Therapy.2022; Volume 16: 2177. CrossRef
Ezetimibe and diabetes mellitus:a new strategy for lowering cholesterol
V.A. Serhiyenko, A.A. Serhiyenko
INTERNATIONAL JOURNAL OF ENDOCRINOLOGY (Ukraine).2022; 18(5): 302. CrossRef
The Effect of Rosuvastatin on Plasma/Serum Levels of High-Sensitivity C-Reactive Protein, Interleukin-6, and D-Dimer in People Living with Human Immunodeficiency Virus: A Systematic Review and Meta-Analysis
Akililu Alemu Ashuro, Yin-Guang Fan, Yuan-Sheng Fu, Dong-Sheng Di, Napoleon Bellua Sam, Hai-Feng Pan, Dong-Qing Ye
AIDS Research and Human Retroviruses.2021; 37(11): 821. CrossRef
Comparison of the Efficacy and Safety of Rosuvastatin/Ezetimibe Combination Therapy and Rosuvastatin Monotherapy on Lipoprotein in Patients With Type 2 Diabetes: Multicenter Randomized Controlled Study
Jiwoo Lee, You-Cheol Hwang, Woo Je Lee, Jong Chul Won, Kee-Ho Song, Cheol-Young Park, Kyu Jeung Ahn, Joong-Yeol Park
Diabetes Therapy.2020; 11(4): 859. CrossRef
Comparison of Renal Effects of Ezetimibe–Statin Combination versus Statin Monotherapy: A Propensity-Score-Matched Analysis
Jaehyun Bae, Namki Hong, Byung-Wan Lee, Eun Seok Kang, Bong-Soo Cha, Yong-ho Lee
Journal of Clinical Medicine.2020; 9(3): 798. CrossRef
Combined use of rosuvastatin and ezetimibe improves hepatic steatosis in patients with dyslipidemia
Won Dong Lee, Beom Kyung Kim, Jun Yong Park, Do Young Kim, Sang Hoon Ahn, Kwang-Hyub Han, Seung Up Kim
European Journal of Gastroenterology & Hepatology.2020; 32(12): 1538. CrossRef
Influence of rosuvastatin dose on total fatty acids and free fatty acids in plasma
Cristian I. Ciucanu, Sonia Olariu, Daliborca C. Vlad, Victor Dumitraşcu
Medicine.2020; 99(48): e23356. CrossRef
The effect of switching from statin-monotherapy to statin/ezetimibe combination therapy on lipid profiles in patients with type 2 diabetes and dyslipidemia: a multicenter open-label study (EUCLID)
Mitsuhide Takeshita, Atsushi Tanaka, Atsushi Kawaguchi, Keiko Sato, Shigeru Toyoda, Teruo Inoue, Koichi Node
Vascular Failure.2020; 4(1): 22. CrossRef
Response: Comparison of the Efficacy of Rosuvastatin Monotherapy 20 mg with Rosuvastatin 5 mg and Ezetimibe 10 mg Combination Therapy on Lipid Parameters in Patients with Type 2 Diabetes Mellitus (Diabetes Metab J 2019;43:582–9)
You-Cheol Hwang
Diabetes & Metabolism Journal.2019; 43(6): 915. CrossRef
Letter: Comparison of the Efficacy of Rosuvastatin Monotherapy 20 mg with Rosuvastatin 5 mg and Ezetimibe 10 mg Combination Therapy on Lipid Parameters in Patients with Type 2 Diabetes Mellitus (Diabetes Metab J2019;43:582–9)
Tae Seo Sohn
Diabetes & Metabolism Journal.2019; 43(6): 909. CrossRef
Changes in Plasma Free Fatty Acids Associated with Type-2 Diabetes
Amélie I. S. Sobczak, Claudia A. Blindauer, Alan J. Stewart
Nutrients.2019; 11(9): 2022. CrossRef

Risk Factors for the Progression of Intima-Media Thickness of Carotid Arteries: A 2-Year Follow-Up Study in Patients with Newly Diagnosed Type 2 Diabetes: Sang Ouk Chin, Jin Kyung Hwang, Sang Youl Rhee, Suk Chon, You-Cheol Hwang, Seungjoon Oh, Kyu Jeung Ahn, Ho Yeon Chung, Jeong-taek Woo, Sung-Woon Kim, Young Seol Kim, Ja-Heon Kang, In-Kyung Jeong; Diabetes Metab J. 2013;37(5):365-374. Published online October 17, 2013; DOI: https://doi.org/10.4093/dmj.2013.37.5.365

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Background

Intima-media thickness (IMT) of the carotid arteries is known to have a positive correlation with the risk of cardiovascular disease. This study was designed to identify risk factors affecting the progression of carotid IMT in patients with type 2 diabetes mellitus (T2DM).

Methods

Patients with newly diagnosed T2DM with carotid IMT measurements were enrolled, and their clinical data and carotid IMT results at baseline and 2 years later were compared.

Results

Of the 171 patients, 67.2% of males and 50.8% of females had abnormal baseline IMT of the left common carotid artery. At baseline, systolic blood pressure, body mass index and smoking in male participants, and fasting plasma glucose and glycated hemoglobin levels in females were significantly higher in patients with abnormal IMT than in those with normal IMT. Low density lipoprotein cholesterol (LDL-C) levels in males and high density lipoprotein cholesterol (HDL-C) levels in females at the 2-year follow-up were significantly different between the nonprogression and the progression groups. Reduction of the United Kingdom Prospective Diabetes Study (UKPDS) 10-year coronary heart disease (CHD) risk score after 2 years was generally higher in the nonprogression group than the progression group.

Conclusion

LDL-C levels in males and HDL-C levels in females at the 2-year follow-up were significantly different between participants with and without progression of carotid IMT. Furthermore, a reduction in the UKPDS 10-year CHD risk score appeared to delay the advancement of atherosclerosis. Therefore, the importance of establishing the therapeutic goal of lipid profiles should be emphasized to prevent the progression of carotid IMT in newly diagnosed T2DM patients.

Citations

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Comparison of the Effectiveness of Low Carbohydrate Versus Low Fat Diets, in Type 2 Diabetes: Systematic Review and Meta-Analysis of Randomized Controlled Trials
Tanefa A. Apekey, Maria J. Maynard, Monia Kittana, Setor K. Kunutsor
Nutrients.2022; 14(20): 4391. CrossRef
Nomogram Based on Risk Factors for Type 2 Diabetes Mellitus Patients with Coronary Heart Disease

Rong Shi, Birong Wu, Zheyun Niu, Hui Sun, Fan Hu
Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy.2020; Volume 13: 5025. CrossRef
HMGA1 Mediated High-Glucose-Induced Vascular Smooth Muscle Cell Proliferation in Diabetes Mellitus: Association Between PI3K/Akt Signaling and HMGA1 Expression
Qinghai Zhang, Ling Chen, Zhibo Zhao, Ying Wu, Jing Zhong, Gebo Wen, Renxian Cao, Xuyu Zu, Jianghua Liu
DNA and Cell Biology.2018; 37(4): 389. CrossRef
Relationship between frequency of hypoglycemic episodes and changes in carotid atherosclerosis in insulin-treated patients with type 2 diabetes mellitus
Tomoya Mita, Naoto Katakami, Toshihiko Shiraiwa, Hidenori Yoshii, Nobuichi Kuribayashi, Takeshi Osonoi, Hideaki Kaneto, Keisuke Kosugi, Yutaka Umayahara, Masahiko Gosho, Iichiro Shimomura, Hirotaka Watada
Scientific Reports.2017;[Epub] CrossRef
Impact of carotid atherosclerosis detection on physician and patient behavior in the management of type 2 diabetes mellitus: a prospective, observational, multicenter study
In-Kyung Jeong, Sin-Gon Kim, Dong Hyeok Cho, Chong Hwa Kim, Chul Sik Kim, Won-Young Lee, Kyu-Chang Won, Doo-Man Kim
BMC Cardiovascular Disorders.2016;[Epub] CrossRef
The effect of fibroblast growth factors and advanced glycation end-products on the intima-media complex thickness in patients with coronary heart disease and type 2 diabetes
Ekaterina Vladimirovna Ivannikova, Victor Yurievich Kalashnikov, Olga Mikhailovna Smirnova, Alexander Borisovich Kuznetsov, Сергей Anatolievich Terekhin, Alexander Viktorovich Il'in
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Autoimmune Hypoglycemia in a Patient with Characterization of Insulin Receptor Autoantibodies: Suk Chon, Moon Chan Choi, Yun Jung Lee, You Cheol Hwang, In-Kyung Jeong, Seungjoon Oh, Kyu Jeung Ahn, Ho Yeon Chung, Jeong-Taek Woo, Sung-Woon Kim, Jin-Woo Kim, Young Seol Kim; Diabetes Metab J. 2011;35(1):80-85. Published online February 28, 2011; DOI: https://doi.org/10.4093/dmj.2011.35.1.80

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Background

Type B insulin resistance syndrome is a manifestation of autoantibodies to the insulin receptor that results in severe hyperglycemia and acanthosis nigricans. However, the mechanisms by which these autoantibodies induce hypoglycemia are largely unknown. In this paper, we report the case of patient with type B insulin resistance syndrome who presented with frequent severe fasting hypoglycemia and acanthosis nigricans.

Methods

To evaluate the mechanism of hypoglycemia, we measured the inhibition of insulin binding to erythrocytes and IM9 lymphocytes in a sample of the patient's dialyzed serum before and after immunosuppressive therapy.

Results

In the patient's pre-treatment serum IgG, the binding of ¹²⁵I-insulin to erythrocytes was markedly inhibited in a dose-dependent manner until the cold insulin level reached 10^-9 mol/L. We also observed dose-dependent inhibition of insulin binding to IM9 lymphocytes, which reached approximately 82% inhibition and persisted even when diluted 1:20. After treatment with glucocorticoids, insulin-erythrocyte binding activity returned to between 70% and 80% of normal, while the inhibition of insulin-lymphocyte binding was reduced by 17%.

Conclusion

We treated a patient with type B insulin resistance syndrome showing recurrent fasting hypoglycemia with steroids and azathioprine. We characterized the patient's insulin receptor antibodies by measuring the inhibition of insulin binding.

Citations

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Systematic Review—Type B Insulin Resistance With Isolated Hypoglycemia and Suppressed Insulin
Natasha Brown, Marianne S Elston
The Journal of Clinical Endocrinology & Metabolism.2024; 109(4): 936. CrossRef
Type B insulin resistance syndrome: a systematic review
Luizianne Mariano Martins, Virgínia Oliveira Fernandes, Manuela Montenegro Dias de Carvalho, Daniel Duarte Gadelha, Paulo Cruz de Queiroz, Renan Magalhães Montenegro
Archives of Endocrinology and Metabolism.2020;[Epub] CrossRef
Autoimmune hypoglycemia
Marina Y. Yukina, Diana A. Davtyan, Ekaterina A. Troshina, Nurana F. Nuralieva
Obesity and metabolism.2018; 15(3): 9. CrossRef
Unique pharmacology of a novel allosteric agonist/sensitizer insulin receptor monoclonal antibody
Simon A. Hinke, Anne M. Cieniewicz, Thomas Kirchner, Katharine D'Aquino, Rupesh Nanjunda, Jason Aligo, Robert Perkinson, Philip Cooper, Ken Boayke, Mark L. Chiu, Steve Jarantow, Eilyn R. Lacy, Yin Liang, Dana L. Johnson, Jean M. Whaley, Russell B. Lingham
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Combined Immunosuppressive Therapy Induces Remission in Patients With Severe Type B Insulin Resistance: A Prospective Cohort Study
Joanna Klubo-Gwiezdzinska, Maria Lange, Elaine Cochran, Robert K. Semple, Cornelia Gewert, Rebecca J. Brown, Phillip Gorden
Diabetes Care.2018; 41(11): 2353. CrossRef
Hypoinsulinemic Hypoglycemia Followed By The Onset Of Severe Insulin Resistance With Hyperglycemia And Circulating Anti-Insulin Receptor Antibodies In A Patient Suffering Systemic Lupus Erythematosus: A Case Report And Literature Review
Guillermo Martínez de Pinillos, Mariana Tomé, María M. Viloria, Joaquín Bobillo, María V. Cózar
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The treatment of hyperinsulinemic hypoglycaemia in adults: an update
M. V. Davi′, A. Pia, V. Guarnotta, G. Pizza, A. Colao, A. Faggiano
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Immunosuppressive Therapy in Treatment of Refractory Hypoglycemia in Type B Insulin Resistance: A Case Report
Lavanya Viswanathan, Imali Sirisena
Journal of the Endocrine Society.2017; 1(12): 1435. CrossRef
反復する低血糖発作を契機に発見されたインスリン受容体異常症B型の1例(A case of type B insulin resistance presenting as recurrent hypoglycemia)
杉本龍 (Ryu Sugimoto), 髙木誠 (Makoto Takaki), 前原潤一 (Junichi Maehara), 具嶋泰弘 (Yasuhiro Gushima)
Nihon Kyukyu Igakukai Zasshi: Journal of Japanese Association for Acute Medicine.2017; 28(3): 100. CrossRef
Type B insulin resistance syndrome
Devina L. Willard, Mary Stevenson, Devin Steenkamp
Current Opinion in Endocrinology, Diabetes & Obesity.2016; 23(4): 318. CrossRef
Antibody-Mediated Insulin Resistance: When Insulin and Insulin Receptor Act as Autoantigens in Humans
Christelle Liminet, Julien Vouillarmet, Karim Chikh, Emmanuel Disse
Canadian Journal of Diabetes.2016; 40(5): 462. CrossRef
The insulin autoimmune syndrome (IAS) as a cause of hypoglycaemia: an update on the pathophysiology, biochemical investigations and diagnosis
Adel A.A. Ismail
Clinical Chemistry and Laboratory Medicine (CCLM).2016; 54(11): 1715. CrossRef
Type B insulin-resistance syndrome presenting as autoimmune hypoglycemia, associated with systemic lupus erythematosus and interstitial lung disease
Seon Mee Kang, Heung Yong Jin, Kyung Ae Lee, Ji Hyun Park, Hong Sun Baek, Tae Sun Park
The Korean Journal of Internal Medicine.2013; 28(1): 98. CrossRef
Treatment of recurrent hypoglycemia with plasmapheresis and steroid in nondiabetic patient
Mustafa Kulaksızoglu, Mustafa Sait Gonen, Levent Kebapcilar, Fatih Sahin, Fatih Demirci, Ali Topcu
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Yogeswari Venugopal, Shireene Vethakkan, Sargunan Sockalingam, Raja Jasmin, Karen Choong
Clinical Diabetes.2013; 31(3): 130. CrossRef
The effect of hyperglycemia and hypoglycemia on glucose transport and expression of glucose transporters in human lymphocytes B and T: An in vitro study
Bożenna Oleszczak, Leszek Szablewski, Monika Pliszka
Diabetes Research and Clinical Practice.2012; 96(2): 170. CrossRef
The effect of glucose concentrations in the medium on expression of insulin receptors in human lymphocytes B and T: anin vitrostudy
Bożenna Oleszczak, Leszek Szablewski, Monika Pliszka
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Fulminant Type 1 diabetes in a pregnant woman as an initial manifestation of the insulin autoimmune syndrome
H. S. Kim, T.‐Y. Lee, E. Y. Kim, J. H. Choi, S. Y. Kim, Y.‐C. Hwang, J.‐H. Kang, K. J. Ahn, H. Y. Chung, I.‐K. Jeong
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A Case of the Type B Insulin Resistance Syndrome with Chronic Hepatitis B
Hyun Seok Choi, Byoung Ho Choi, Seok Hoo Jeong, Shung Han Choi, Dong Su Shin, Sei hyun Kim, Young Sil Eom, Sihoon Lee, Yeun Sun Kim, Ie Byung Park, Ki Young Lee
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The Changes in Early Phase Insulin Secretion in Newly Diagnosed, Drug Naive Korean Prediabetes Subjects: Sang Youl Rhee, Joo Young Kim, Suk Chon, You Cheol Hwang, In Kyung Jeong, Seungjoon Oh, Kyu Jeung Ahn, Ho Yeon Chung, Jeong-taek Woo, Sung Woon Kim, Jin-Woo Kim, Young Seol Kim; Korean Diabetes J. 2010;34(3):157-165. Published online June 30, 2010; DOI: https://doi.org/10.4093/kdj.2010.34.3.157

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Abstract PDF PubReader

Background

There have been no systematic observations regarding changes in early phase insulin secretion among Korean prediabetes and early stage type 2 diabetes mellitus (T2DM) patients.

Methods

We conducted 75-g oral glucose tolerance tests (OGTT) in 873 subjects with suspected abnormal glucose tolerance. All subjects were diagnosed as having normal glucose tolerance (NGT), prediabetes (preDM), or T2DM according to the OGTT results and the insulin secretory and insulin resistance indices of each subject were calculated. Additionally, we analyzed the changes in early phase insulin secretion according to changes in fasting (Glc₀), post-prandial (Glc₁₂₀) glucose and HbA1c (A1c) levels.

Results

As compared to subjects with NGT, the insulin secretory indices of the preDM and T2DM subjects progressively declined, and the insulin resistance indices were progressively aggravated. Early phase insulin secretion decreased rapidly according to the increments of Glc₀, Glc₁₂₀ and A1c, and these changes were most prominent in the NGT stage. Compared to the control group, the early phase insulin secretion levels of the preDM or T2DM subjects were less than 50% when Glc₀ was over 100 mg/dL, Glc₁₂₀ was over 145 mg/dL, and A1c was over 5.8%.

Conclusion

This study suggests that progressive beta cell dysfunction in Koreans may be initiated and rapidly aggravated during the period generally designated as 'normal.'

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High normal HbA1c levels were associated with impaired insulin secretion without escalating insulin resistance in Japanese individuals: the Toranomon Hospital Health Management Center Study 8 (TOPICS 8)
Y. Heianza, Y. Arase, K. Fujihara, H. Tsuji, K. Saito, S. D. Hsieh, S. Kodama, H. Shimano, N. Yamada, S. Hara, H. Sone
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