2007 Fiscal Year Final Research Report Summary
Comprehensive analysis of glucose metabolism by using stable-labeled minimal model approach
| Project/Area Number |
16590893
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metabolomics
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| Research Institution | Jichi Medical University |
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Principal Investigator |
NAGASAKA Shoichiro Jichi Medical University, Department of Medicine, Assistant professor (00296112)
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| Co-Investigator(Kenkyū-buntansha) |
TOKUYAMA Kumpei University of Tsukuba, Institute of Health and Sports Sciences, Associate Professor (00207565)
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| Project Period (FY) |
2004 – 2007
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| Keywords | stable glucose / glucose tolerance test / insulin secretion / insulin sensitivity / endogenous glucose production / glucose effectiveness / lucose intolerance |
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| Research Abstract |
(1) Pathogenesis of glucose intolerance in Japanese population
Determinants of glucose disappearance in intravenous glucose tolerance tests (IVGTT) is analyzed in 32 subjects with normal glucose tolerance, 15 subjects with impaired fasting glucose and/or impaired glucose tolerance, and 11 subjects with diabetes mellitus (fasting glucose < 126 mg/dl). Glucose tolerance in IVGTT (Kg values) and post-challenge glucose levels (oral challenge) are mainly determined by acute insulin response (AIR) to glucose and peripheral-tissue specific insulin sensitivity (SI2*). Therefore, in subjects with lower AIR, decrease in SI2* would result in deterioration in Kg values and post-challenge glucose levels. In contrast, fasting glucose levels are mainly determined by hepatic insulin sensitivity and non-insulin-dependent (glucose-dependent) tissue glucose uptake (Sg2*, glucose effectiveness), in addition to AIR.
(2) Effects of exercise training on peripheral-tissue specific insulin sensitivity (SI2*) and glucose effectiveness (SG2*)
In healthy subjects, both 12 weeks of exercise training and a single bout of 30 minute exercise increase SI2* and SG2* (Reference 1 & 2).
(3) Future directions
We have now constructed new indices of hepatic insulin sensitivity (hSI2) and hepatic glucose effectiveness (hSG2) by using new minimal model analysis including another hepatic component (Am J Physiol 288: E1038, 2005). Using these new indices, further analysis is now being made on pathogenesis of glucose intolerance and effects of exercise training.
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[Journal Article] New insights on the simultaneous assessment of insulin sensitivity and β-cell function with the HOMA2 method. Response to Caumo, et. al.2007
Author(s)
Nagasaka, S., Sato, N., Takahashi, N., Kusaka, I., Ishibashi, S
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Journal Title
Diabetes Care 30
Pages: e42
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A single bout of exercise at higher intensity enhances glucose effectiveness in sedentary men2005
Author(s)
Hayashi, Y., Nagasaka, S., Takahashi, N., Kusaka, I., Ishibashi, S., Numao, S., Lee, D. J., Taki, Y., Ogata, H., Tokuyama, K., Tanaka, K
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Journal Title
J. Clin. Endocrinol. Metab 90
Pages: 4035-4040
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Effect of moderate exercise training on peripheral glucose effectiveness, insulin sensitivity, and endogenous glucose production in healthy humans estimated by a two-compartment-labeled minimal model2004
Author(s)
Nishida, Y., Tokuyama, K., Nagasaka, S., Higaki, Y., Shirai, Y., Kiiyonaga, A., Shindo, M., Ikuyo, K., Nakamura, T., Ishibashi, S., Tanaka, H
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Journal Title
Diabetes 53
Pages: 315-320
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Hepatic insulin sensitivity of runners assessed by integrated model of hepatic and peripheral glucose regulation2006
Author(s)
Tokuyama, K., Nagasaka, S., Mori, S., Kusaka, I., Kiyonaga, A., Tanaka, H., Shindo, M
Organizer
19th World Diabetes Congress, International Diabetes Federation, Cape Town, S
Place of Presentation
Africa
Year and Date
20061203-07
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Insulin sensitivity of runners assessed by integrated model of hepatic and peripheral glucose - regulation2006
Author(s)
Tokuyama, K., Nagasaka, S., Mori, S., Kusaka, I., Kiyonaga, A., Tanaka, H., Shindo, M
Organizer
66th Scientific Sessions, American Diabetes Association
Place of Presentation
Washington, DC
Year and Date
20060609-13
Description
「研究成果報告書概要(欧文)」より
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[Book] 糖尿病学20042004
Author(s)
長坂 昌一郎(分担執筆)
Total Pages
160
Publisher
診断と治療社
Description
「研究成果報告書概要(和文)」より
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