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Effects of aging and food restrictio...
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Tucker, Michelle Zavitz.
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Effects of aging and food restriction on skeletal muscle fatty acid metabolism and fuel selection regulation.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Effects of aging and food restriction on skeletal muscle fatty acid metabolism and fuel selection regulation./
作者:
Tucker, Michelle Zavitz.
面頁冊數:
208 p.
附註:
Adviser: Lorraine P. Turcotte.
Contained By:
Dissertation Abstracts International63-05B.
標題:
Biology, Animal Physiology. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3054817
ISBN:
0493701400
Effects of aging and food restriction on skeletal muscle fatty acid metabolism and fuel selection regulation.
Tucker, Michelle Zavitz.
Effects of aging and food restriction on skeletal muscle fatty acid metabolism and fuel selection regulation.
- 208 p.
Adviser: Lorraine P. Turcotte.
Thesis (Ph.D.)--University of Southern California, 2001.
In conclusion, FA utilization is altered with aging, and short-term FR is an effective treatment to induce changes in FA utilization.
ISBN: 0493701400Subjects--Topical Terms:
1017835
Biology, Animal Physiology.
Effects of aging and food restriction on skeletal muscle fatty acid metabolism and fuel selection regulation.
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Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2319.
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Thesis (Ph.D.)--University of Southern California, 2001.
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In conclusion, FA utilization is altered with aging, and short-term FR is an effective treatment to induce changes in FA utilization.
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The purpose of the current investigation was two-fold: (1) To examine the utilization of fatty acids (FA) by skeletal muscle in young, middle-aged, and old adult animals, and (2) To determine if short-term food restriction (FR) induced positive alterations in FA metabolism. Two experimental series were conducted. The first determined the effects of aging on FA utilization under basal or insulin stimulated-conditions, and the second examined the effects of short-term FR in young or old animals.
520
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In the first aging experiment, male F344/BN rats aged 5, 15, or 24 months underwent hindlimb perfusion under basal conditions. Glucose and FA uptake were similar between groups. Percent and total FA oxidation were decreased and muscle triglyceride (TG) concentrations increased in old animals. These results indicate that under basal conditions, the reduction in FA disposal to oxidation may contribute to TG accumulation in muscle of old animals. In the second aging experiment, rats aged 5, 15, or 24 months underwent hindlimb perfusion under hyperglycemic-hyperinsulinemic conditions. FA uptake, FA oxidation, and muscle TG levels were increased in old animals. Palmitate uptake correlated with TG concentration and synthesis rate. These results indicate that under insulin-stimulated conditions, increased FA uptake associated with increased TG synthesis, may contribute to muscle TG accumulation in old animals.
520
$a
The first FR experiment was conducted in hindlimbs of young rats. FA uptake, FA oxidation, glucose uptake and glycogen synthesis were increased by FR. Glucose uptake and TG concentration were negatively correlated. In conclusion, our results show that under hyperglycemic-hyperinsulinemic conditions, FR increased FA oxidative disposal, which may contribute to improved insulin sensitivity by decreasing the accumulation of muscle TG. The second FR experiment was conducted in hindlimbs of old rats. Glucose and FA uptake were similar between groups. FA oxidation, TG concentrations, and synthesis were decreased by FR. Our results indicate that FR effectively reversed age-related alterations in FA metabolism under insulin-stimulated conditions.
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