- Establishment of Blood Glucose Monitoring System using Internet.
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Hee Soo Kim, Jae Hyoung Cho, Hyuk Sang Kwon, Jin Hee Lee, Bok Re Song, Jung A Oh, Kun Ho Yoon, Ho Young Son
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Korean Diabetes J. 2003;27(3):280-287. Published online June 1, 2003
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 Abstract
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- BACKGROUND
The internet has been used world wide as a communication tool. To improve the quality of glucose control, the effectiveness of an Internet-based Blood Glucose Monitoring System (IBGMS), on changes in HbA1c levels, was investigated. RESEARCH DESIGN AND METHODS: A randomized clinical trial, involving 110 patients who had visited outpatient's clinic at the Kangnam St. Mary's Hospital diabetes center for 3 months, was conducted. The study subjects were treated with IBGMS for 12 weeks, with a control group receiving the usual outpatient management for the same period. HbA1C and other laboratory tests were performed at the baseline and at the end of the study. RESULTS: There were no significant differences found between the two groups at the baseline measurements, with respect to age, sex, diabetes duration, body mass index, blood pressure, HbA1C and other laboratory data. In the follow up tests, the study group showed a significant reduction in the HbA1C level, by 7.1% (0.54% absolute, p=0.001), while the control group showed an increased HbA1C level (p=0.054). Moreover, there was an 11.1% reduction (0.92% absolute, p<0.001) in the HbA1C level in the patients with HbA1C levels > or =7.0% at baseline in the study group, but those with HbA1C levels <7.0% maintained good HbA1c levels, 6.32%, by the end of the study. CONCLUSIONS: This new IBGMS resulted in a significant reduction in the HbA1C levels during the study period. We propose this IBGMS as a new method for glycemic control.
- The Effect of Nitric Oxide on Insulin Binding and Insulin Receptor Recycling in Bovine Aortic Endothelial Cells.
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Hyuk Sang Kwon, Oak Kee Hong, Hee Soo Kim, Jung Min Lee, Sung Rae Kim, Sung Dae Moon, Sang Ah Jang, Hyun Shik Son, Kun Ho Yoon, Moo Il Kang, Bong Yun Cha, Kwang Woo Lee, Ho Young Son, Sung Koo Kang
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Korean Diabetes J. 2003;27(3):213-227. Published online June 1, 2003
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Abstract
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- BACKGROUND
The coexistence of insulin resistance and endothelial dysfunction is commonly observed in a variety of metabolic and cardiovascular disorders, including athero-sclerosis and type 2 diabetes mellitus. Because nitric oxide (NO), or nitric oxide synthase (NOS), has been suggested as a significant contributing factor in the development of endothelial dysfunction and insulin resistance, reactive NO or NOS were investigated to see if they contribute to the insulin internalization pathway. METHODS: The production of NO (Nitrite), the expression of eNOS (endothelial NOS), insulin binding and the insulin receptor internalization and recycling, following 48 hours of incubation with bradykinin (BK), acetylcholine (Ach), NG-monomethyl- L-arginine (L-NMMA) and N-nitro-L-arginine methylester (L-NAME) in Bovine aortic endothelial cells (BAECs), were examined. RESULTS: The results were as follows: 1. In relation to the time course, the production of eNOS was increased, but was decreased after 8 hours of incubation. The production of eNOS in the L-NMMA and L-NAME treated groups was significantly decreased compared with that of the controls (p<0.05). 2. The specific insulin bindings to the receptors of the endothelial cells were maximized within 20 mins, and then decreased. At 20 mins, the binding rate of the L-NMMA treated group was significantly decreased compared to that of the controls. At a concentration of 0.4ng/ml of unlabelled insulin, the specific insulin binding of the L-NMMA treated group was significantly decreased compared to that of the controls (p<0.05). 3. The internalization of 125I-insulin into the endothelial cells, as assessed by the acid washing dissociation method, occurred rapidly. The internalized radioactivity of 125I-insulin, at 20 mins, was significantly increased in the BK and Ach groups compared with the controls (p<0.05). 4. The recycling of the internalized insulin receptors showed no significant differences between the study groups, but the recycling was slightly delayed compared with controls in the Ach group. CONCLUSION: In conclusion, the NO generating substances, BK and Ach, and the inhibitory substance, L-NMMA, may influence the binding and internalization of insulin-insulin receptors. Our results suggest that NO might contribute to the transcytosis of insulin in BAECs
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