首页   按字顺浏览 期刊浏览 卷期浏览 Peripheral and hepatic insulin sensitivity in healthy elderly human subjects
Peripheral and hepatic insulin sensitivity in healthy elderly human subjects

 

作者: D.L. BROUGHTON,   O.W.F. JAMES,   K.G.M.M. ALBERTI,   R. TAYLOR,  

 

期刊: European Journal of Clinical Investigation  (WILEY Available online 1991)
卷期: Volume 21, issue 1  

页码: 13-21

 

ISSN:0014-2972

 

年代: 1991

 

DOI:10.1111/j.1365-2362.1991.tb01352.x

 

出版商: Blackwell Publishing Ltd

 

关键词: Body weight;exercise test;gerontology;glucose tolerance test;insulin;insulin resistance

 

数据来源: WILEY

 

摘要:

Abstract.Insulin resistance has been reported in normal ageing but discrepancies between such studies may be related to compounding factors such as body composition and exercise patterns. We employed a two‐step hyperinsulinaemic euglycaemic clamp to assess peripheral and hepatic tissue insulin sensitivity and glucose recycling in 13 elderly (E) and 14 young (Y) healthy subjects controlling for the above factors. There was no difference in basal hepatic glucose production (E: 2±36 ± 0±06, Y: 2±47 ± 0±1 mg kg–1min–1;P= 0±4). At step 1 (insulin infusion 15mUkg–1h–1) glucose turnover was similar (E: 2±65 ± 0±13, Y: 2±88 ± 0±22 mg kg–1min–1;P= 0±4) but hepatic glucose production was lower in the elderly group (0±20 ± 0±16 vs 0±64 ± 0±10 mg kg–1min–1;P= 0±03). At step 2 (insulin infusion 50 mU kg–1h–1) glucose turnover was similar (E: 7±60 ± 0±24, Y: 8±05 ± 0±34 mg kg–1min–1;P= 0±3) and hepatic glucose production was equal but negative (E: –1±35 ± 0±18, Y: ‐1±34 ± 0±22 mg kg–1min–1;P= 0±9). Glucose recycling did not differ between the groups at any stage. Similar serum insulin levels were achieved in both groups at each step. Decreased glucose tolerance was confirmed in E with a higher 2 h blood glucose after an OGTT (5±3 ± 0±4 vs 4±1 ± 0±3 mmol l–1;P= 0±03) but incremental insulin response was similar (E: 3236 ± 289, Y: 3586 ± 463 mU l–1min–1;P= 0±5). We conclude that changes in hepatic tissue insulin sensitivity do not cause the deterioration in glucose tolerance observed with age. A small reduction in both

 

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