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KMID : 0613820070170060859
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Journal of Life Science
2007 Volume.17 No. 6 p.859 ~ p.866
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Effects of maternal exercise on expression of GLUT-4, VAMP-2 in skeletal muscle and plasma insulin and leptin levels in pregnant rats
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Yoon Jin-Hwan
Lee Hee-Hyuk
Kim Jong-Oh
Oh Myung-Jin
Park Seong-Tae
Jee Yong-Seok
Seo Tae-Beom
Namgoong Uk
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Abstract
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The main objective of this study was to investigate the effects of exercise on serum insulin and leptin levels and GLUT-4 and VAMP-2 in skeletal muscles from the pregnant rats. F344 rats were randomly divided into four groups (n = 15 in each group): control group (CG), pregnant group (PG), pregnant running group (PR), and pregnant swimming group (PS). From the 15th day of pregnancy, animals in the running group were forced to run on treadmill for 30 min with a light intensity, while those in the swimming group were forced to swim in swimming pool for 10 min once a day for 6 consecutive days. The present result demonstrated that in pregnant rat group, serum insulin levels significantly increased and leptin levels significantly decreased. Skeletal GLUT-4 and VAMP-2 protein expression was significantly decreased in pregnant rats compared to non-pregnant rats. However, maternal running during gestational period alleviated pregnancy-induced changes in plasma insulin and leptin levels, and it significantly enhanced skeletal GLUT-4 and VAMP-2 protein expression. From those results, it can be suggested that running exercise during gestational period may improve glycemic control by up-regulating GLUT-4 and VAMP-2 protein expression.
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KEYWORD
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maternal exercise, insulin, leptin, GLUT-4, VAMP-2
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