Free fatty acid and glucose metabolism in human aging: evidence for operation of the Randle cycle.
Free fatty acid and glucose metabolism in human aging: evidence for operation of the Randle cycle.
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人类衰老中的游离脂肪酸和葡萄糖代谢:兰德尔循环运作的证据。
DOI:
10.1152/ajpendo.1994.266.3.e501
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发表时间:
1994
期刊:
影响因子:
--
通讯作者:
DeFronzo,RA
中科院分区:
文献类型:
--
作者:
Bonadonna,RC;Groop,LC;Simonson,DC;DeFronzo,RA
We assessed insulin effects on plasma free fatty acid (FFA) and glucose metabolism in seven elderly (71 +/- 2 yr) and in seven younger (21 +/- 1 yr) subjects matched for body weight and body mass index but not for percent body fat (32.4 +/- 3.8% in elderly vs. 20.4 +/- 3.5% in young, P < 0.05), by performing sequential euglycemic clamps at five insulin doses (0.6, 1.5, 3, 6, and 15 pmol.min-1.kg-1) in combination with indirect calorimetry and [1-14C]palmitate plus [3-3H]glucose infusion. At baseline, plasma FFA concentration, turnover infusion. At baseline, plasma FFA concentration, turnover and oxidation, and total lipid oxidation were all increased in the elderly (897 +/- 107 vs. 412 +/- 50 mumol/l and 11.2 +/- 1.4 vs. 5.14 +/- 0.86, 3.45 +/- 0.65 vs. 1.37 +/- 0.25, and 4.63 +/- 0.72 vs. 3.01 +/- 0.33 mumol.min-1.kg-1 lean body mass, P < 0.05 for all comparisons), whereas glucose turnover was similar as a result of decreased glucose oxidation (8.2 +/- 1.4 vs. 13 +/- 1.9 mumol.min-1.kg-1 lean body mass, P < 0.05) and increased glucose storage (6.6 +/- 1.4 vs. 1.7 +/- 1.3 mmol.min-1.kg-1 lean body mass, P < 0.05). At all insulin infusions, plasma FFA concentration, turnover and oxidation, and total lipid oxidation were higher in the elderly than in the younger group (P < 0.05). However, if normalized per fat mass, all FFA and lipid metabolic fluxes, both in the postabsorptive state and during hyperinsulinemia, were comparable in the two groups.(ABSTRACT TRUNCATED AT 250 WORDS)
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影响因子:
15.9
作者:
ROWE, JW;MINAKER, KL;FLIER, JS
通讯作者:
FLIER, JS
影响因子:
15.9
作者:
GROOP, LC;BONADONNA, RC;DEFRONZO, RA
通讯作者:
DEFRONZO, RA
影响因子:
7.7
作者:
M. Mcmahon;W. Schwenk;M. Haymond;R. Rizza
通讯作者:
R. Rizza
影响因子:
39.2
作者:
R. Metz;B. Surmaczynska;S. Berger;G. Sobel
通讯作者:
G. Sobel
DOI:
10.1093/ajcn/51.2.248
发表时间:
1990-02
期刊:
The American journal of clinical nutrition
影响因子:
--
作者:
R R Wolfe-R;F. Jahoor
通讯作者:
R R Wolfe-R;F. Jahoor