Effect of aerobic exercise on blood lipid and ICAM-1,LFA-1 in hyperlipidemia rats / 中国医师杂志

ABSTRACT

Objective To observe aerobic exercise on blood lipid and intercellular adhesion molecule-1 (ICAM-1),lymphocyte function-associated antigen-1 (LFA-1) in hyperlipidemia rats.Methods 120 male Sprague Dawley (SD) rats were randomized into the 4 groups (n =30):normal diet group (control group),high fat group (HF group),HF + SBC-115076 group [SBC-115076,8 mg/kg · w)] and HF + aerobic exercise group.Rats in HF group and HF + SBC-115076 group did not exercise during feeding and lived in normal cage.Rats in HF + SBC-115076 group recieved PCSK9 inhibitor SBC-115076 (8 mg/kg) injection once a week for 8 weeks.HF + aerobic exercise group underwent load-free swimming training 6 days a week for 8 weeks.The rats were sacrificed 8 weeks later.The serum levels of triglyceride (TG),total cholesterol (TC),low density lipoprotein (LDL),high density lipoprotein (HDL),ICAM-1 and LFA-1 were measured by apical blood sampling.Hematoxylin-eosin (HE) staining of thoracic aorta to observe pathological changes of aorta.Results After modeling,there was no significant difference in the food intake levels of the hyperlipidemia rats (P ＞ 0.05).The body weight of HF rats and HF + SBC-115076 rats increased significantly than HF + aerobic exercise rats (P ＜ 0.01).The levels of serum lipid profile,ICAM-1,and LFA-1 were significantly different between HF rats and control rats.Compared with HF rats,serum levels of TG,TC,LDL,ICAM-1 and LFA-1 in HF + SBC-115076 group and HF + aerobic exercise group were significantly lower and HDL levels were significantly higher.HE staining showed that the intimal thickening was significantly improved in HF + aerobic exercise group with less endothelial damage.Conclusions Aerobic exercise can reduce the levels of serum TG,TC,LDL and increase HDL level in rats with hyperlipidemia.It can improve the intimal thickening and endothelial damage caused by high-fat diet by reducing the expression levels of serum ICAM-1 and LFA-1,and has anti-atherosclerosis effect.