Endurance exercise training reduces gallstone development in mice

Journal of Applied Physiology
Kenneth R WilundKijin Kim

Abstract

Gallstones form when the ratio of bile cholesterol to bile acids and phospholipids is elevated, causing cholesterol to precipitate. Physical inactivity is hypothesized to increase gallstone development, but experimental evidence supporting this is lacking, and potential mechanisms for the antilithogenic effects of exercise have not been described. The purpose of this study was to examine the effect of endurance exercise training on gallstone formation and the expression of genes involved in bile cholesterol metabolism in gallstone-sensitive (C57L/J) mice. At 10 wk, 50 male mice began a lithogenic diet and were randomly assigned to an exercise-training (EX) or sedentary (SED) group (n = 25 per group). Mice in the EX group ran on a treadmill at approximately 15 m/min for 45 min/day for 12 wk. At the time animals were euthanized, gallstones were collected, pooled by group, and weighed. The weight of the gallstones was 2.5-fold greater in the SED mice compared with EX mice (143 vs. 57 mg, respectively). In the EX mice, hepatic expression of the low-density lipoprotein receptor (LDLr), scavenger receptor class B type 1 (SRB1), and sterol 27 hydroxylase (Cyp27) was increased by approximately 2-fold (P < 0.05 for each). The LDLr and S...Continue Reading

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Jul 8, 2010·Lipids in Health and Disease·Pauli V Luoma
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