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Department of Medicine, University of California, San Diego, La Jolla, California 92093-0623
Moderate ethanol
consumption demonstrates a protective effect against cardiovascular
disease and improves insulin sensitivity, possibly through
angiogenesis. We investigated whether 1) ethanol would
increase skeletal muscle growth factor gene expression and 2) the effects of ethanol on skeletal muscle growth factor
gene expression were independent of exercise-induced growth factor gene
expression. Female Wistar rats were used. Four groups (saline + rest; saline + exercise; 17 mmol/kg ethanol + rest; and 17 mmol/kg ethanol + exercise) were used to measure the growth factor
response to acute exercise and ethanol administration. Vascular
endothelial growth factor (VEGF), transforming growth
factor-
1 (TGF-
1), basic fibroblast growth
factor (bFGF), Flt-1, and Flk-1 mRNA were analyzed from the left
gastrocnemius by quantitative Northern blot. Ethanol increased VEGF,
TGF-
1, bFGF, and Flt-1 mRNA at rest and after acute
exercise. Ethanol increased resting Flk-1 mRNA. Ethanol increased bFGF
mRNA independently of exercise. These findings suggest that
1) ethanol can increase skeletal muscle angiogenic growth
factor gene expression and 2) the mechanisms responsible for
the ethanol-induced increases in VEGF, TGF
1, and Flt-1
mRNA appear to be different from those responsible for exercise-induced
regulation. Therefore, these results provide evidence in adult rat
tissue that the protective cardiovascular effects of moderate ethanol
consumption may result in part through the increase of angiogenic
growth factors.
vascular endothelial growth factor; basic fibroblast growth factor; transforming growth factor-
1; Flt-1; Flk-1
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