Effects of aerobic exercise on plasma tissue plasminogen activator/plasminogen activator inhibitor-1 and postaglandin I2/thromboxanes A2 in rats fed a high methionine diet

Abstract

Objective To observe the effects of aerobic training on plasma tissue plasminogen activator/plasminogen activator inhibitor-1 and postaglandin I2/thromboxanes A2 in rats fed a high methionine diet. Methods Ninetysix male Wistar rats were randomly divided into a normal diet control group (CR), a high methionine diet group (MR)and a high methionine diet plus 90 min aerobic training intervention group (T + MR). After 8 weeks of training, the plasma level of homocysteine (Hcy) 6-keto-PGF1α, TXB2, t-PA and PAI-1 were measured. Results Plasma Hcy in the MR group increased two-fold as compared with the CR group, whereas t-PA/PAI-1 and 6-keto-PGF1α/TXB2 of the MR group decreased significantly. Plasma Hcy in the T + MR group significantly decreased, while plasma t-PA/PAI-1 and 6-ketoPGF1α/TXB2 increased significantly compared with the MR group. The above parameters were not different in the T + MR group from those of the CR group. Conclusions Hyperhomocysteinemia could be induced by a high methionine diet.Proper training can decrease the plasma Hcy level of rats fed with a high methionine diet, and correcting the imbalance of t-PA/PAI-1 and 6-Keto-PGF1α/TXB2 could prevent the development of hyperhomocysteinemia. Key words: Hyperhomocysteinemia; Prostaglandin; Thromboxane; Fibrinolysis; Aerobic exercise