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Jong Ho Ahn  (Ahn JH) 5 Articles
Correlation between Basal Insulin Requirements and Daily Administered Insulin Dosage in Diabetes.
Min Kyong Moon, Jong Ho Ahn, Tae Yong Kim, Won Shik Shinn, Soo Lim, Young Min Cho, Kyong Soo Park, Seong Yeon Kim, Hong Kyu Lee
Korean Diabetes J. 2000;24(5):552-559.   Published online January 1, 2001
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In patients who need insulin therapy, it is difficult to assess insulin requirements because of individual variability in insulin sensitivity and secretion. The aim of this study is to know that it is possible to achieve rapidly and efficiently normoglycemia based on insulin infusion algorithm and whether there is correlation between basal insulin requirements and daily administered total insulin dose. METHODS: Total 34 patients were enrolled. Insulin infusion was begun at 2:00 p.m., and bedside blood glucose concentration was measured at hourly intervals. The rate of insulin infusion was adjusted according to blood glucose levels. We compared insulin requirements to maintain normoglycemia (basal insulin requirements) with daily administered total insulin dose. RESULTS: At start, the mean blood glucose concentration was 14.9+/-4.7 mmol/L; by the first hour, it was 10.7+/-3.6 mmol/L; by the second hour, it was 7.4+/-3.1 mmol/L; when the infusion was discontinued, it was 5.7+/-1.0 mmol/L. This algorithm successfully inducted normoglycemia in all patients within 3.5+/-1.8 h. There was significant correlation between basal insulin requirements and daily administered total insulin dosage. And, daily administered insulin dose had significant correlation with first hour glucose concentration, first hour insulin infusion rate, second hour glucose concentration, second hour insulin infusion rate, and glucose concentration at the end. CONCLUSIONS: We concluded that normoglycemia can be achieved rapidly and efficiently based on insulin infusion algorithm. The present study suggested that we could predict daily insulin requirements through basal insulin requirements that we measured.
Decreased Mitochondrial DNA Content in Peripheral Blood Leukocyte procedes the Development of Type 2 Diabetes Mellitus.
Jae Joon Koh, Jong Ho Ahn, Soon Ja Kwon, Ji Hyun Song, Chan Soo Shin, Do Joon Park, Kyong Soo Park, Seong Yeon Kim, Hong Kyu Lee
Korean Diabetes J. 1998;22(1):56-64.   Published online January 1, 2001
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AbstractAbstract PDF
Mitochondrial mutations and deletions, have been implicated in the pathogenesis of diabetes mellitus. This can explain only a very small proportion of the patients with diabetes mellitus. Mitochondrial DNA(mtDNA) is vulnerable to oxidative stress, resulting in both qualitative and quantitative changes. We reported that the amount of mtBNA decreased in the peripheral blood leukocyte of patients with NIDDM. In this study, we examined that decreased mtDNA content preceded the development of NIDDM{Non-insulin dependent diabetes mellitus) and correlated with various insulin resistance parameters.In this study, we demonstrated that the amount of mtDNA decreased in peripheral blood leukocyte of patients with NIDDM. Furthermore, we found that lower mtDNA levels preceded the development of diabetes mellitus. METHODS: We utilized the stored blood samples from two community-based survey conducted in Yonchon County, Korea in 1993 and 1995. We selected 23 newly diagnosed diabetic patients and 22 age- and sex-matched control subjects. The buffy coats of peripheral blood samples were used for the competitive PCR and the products pairs were separated by gel EP. The content of mtDNA was calculated with the densitometry. RESULTS: There were no difference in the initial anthropometric parameters, blood pressure and lipid profiles between subjects who became diabetic converters and non converters. The mean quantity of mtDNA was lower in the converters, with 102.8+ 41.5 copies/pg template DNA compared to 137.8+ 67.7 copies/pg template DNA of the controls(p 0.05). The significant inverse correlations were noted between mtDNA content and WHR(r=0.31, p<0.05) in the first, and fasting glucose level(r=-0.35, p<0.05), diastolic blood pressures(r=-0.36, p<0.05), and WHR(r=-0.40, p<0.01) in the second survey. The correlations with the serum levels of total and high density cholesterol, triglyceride, insulin and proinsulin were not statistically significant. CONCLUSION: Although a relationship between diabetes and mitochondrial dysfunction has been suspected. This study showed that decreased mtDNA content in peripheral blood proceded the development of NIDDM. This is the first study to demonstrate that quantitative changes in mtDNA precede the development of NIDDM.
The Effect of Elevated Plasma Free Fatty Acids on Non-Insulin-Mediated Glucose Uptake and Insulin Resistance.
Yong Ki Min, Jong Ho Ahn, Jae Joon Koh, Hong Kyu Lee, Hun Ki Min
Korean Diabetes J. 1998;22(1):47-55.   Published online January 1, 2001
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AbstractAbstract PDF
In vivo glucose uptake occurs via two mechanisms, namely insulin-mediated glucose uptake(IMGU) and non-insulin-mediated glucose up-take(NIMGU). NIMGU accaunts for about 70~85% of postabsorptive glucose uptake. Despite many studies, it is still controversial how an increase in lipolysis affects glucose metabolism in man. More specifically, the effect of free fatty acid(FFA) on NIMGU has not been exanuned. METHOD: Two-step(euglycemia- hyperglycemia) glucose clamp techique with [3-H]-glucose infusion was performed in 6 normal men. Each man was studied twice, with(test experiement) and without (control experiment) the administration of lipid and heparin at an interval of at least 4 weeks in random order. The subjects received an insulin infusion at 1.1 pmol/kg. min in conjuction with the infusion of somatostatin(step 1, 153 nmol/h; step 2, 458 nmol/h). Result: Plasma glucose levels during step 1 were 5.4+0.1 mmol/L(control experiment), 5.4+0.1 mmol/ L(test experiment), and were raised to 14.7+0.2 mmol/L, 14.6+0.1 mmol/L, respectively, during step 2. Plasma insulin levels during step 1 were 56+4 pmol/L(control experiment), 52+4 pmol/L(test experiment), and were 65+3 pmol/L, 62+4 pmol/L, respectively, during step 2. In control experiment, plasma FFA levels were 0.24+0.02 mmol/L during step 1 and 0.11+0.01 mmol/L during step 2. In test experiment, plasma FFA levels increased significantly to 1.08+0.06 mmol/L during step 1 and 1.01 +0.04 mmol/L during step 2, respectively(p<0.01). Glucose infusion rate(GIR) to increase glucose concentrations to the desired levels were 7.7+0.8 pnol/ kg,min during step 1 and 29.7+3.7 pmol/kg.min during step 2 in control experiment. In test experiment, GIR decreawd significantly to 3.8+0.9 pmol/ kg.min during step 1 and 20.7+1.2 pmol/kg.min during step 2, respectively(p<0.05). There was no significant difference between NIMGU, estimated by the difference between glucose disapperance rate of step 1 and step 2 of lipid infusion test experiment and that of control experiment. CONCLUSION: These results showed that artificial elevation of plasma FFA levels led to a state of insulin resistance, however, the change of FFA level did not influence NIMGU in man.
The frequencies of HLA DQAI, DQBI alleles in Korean adult onset IDDM .
Sung Kwan Hong, Jong Ho Ahn, Kyung Soo Ko, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Yeon Bok Jang
Korean Diabetes J. 1992;16(2):121-127.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.
Fatty acid composition and delta 6 desaturase activities in strepto-zotocin induced diabetic rats following omega-3 fatty acid supple-mentation.
Chan Soo Shin, Eun Kyung Han, Jong Ho Ahn, Kyong Soo Park, Moon Kyu Lee, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Hyung Joon Yoo, Yeung Hwan Chung
Korean Diabetes J. 1992;16(2):111-119.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.

Diabetes Metab J : Diabetes & Metabolism Journal
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