RESUMO
AIM:To investigate the dependence of the adrenoceptor regulation on oxidative stress in the rats with cardiac injury induced by high sympathetic activity .METHODS: Healthy SD rats were randomly divided into 7 groups:control, model, propranolol (Pro), prazosin (Praz), Pro+Praz, vitamin E (VE) and Pro+Praz+VE.The rats were intraperitoneally injected with norepinephrine ( NE) for continuous 16 d to reproduce cardiac injury , and treated with the respective drugs .During the experimental process , the body weight was recorded .At the end of the experiments , the following parameters were measured:the ventricular remodeling indexes ( cardiac index and hydroxyproline of the left ven-tricle), histopathologic examination , oxidative/antioxidative indexes [MDA, SOD, catalase (CAT), GSH-Px and total an-tioxidant capacity (T-AOC)], and energy metabolism (Na+-K+ATPase and Ca2+-Mg2+ATPase).RESULTS: The in-crease of body weight in model group was significantly slower than that in control group after 9 d of treatment (P<0.05). The cardiac index and left ventricular hypertrophy were significantly increased .Oxidation/antioxidation and energy metabo-lism were disturbed.In Pro, Praz, Pro+Praz and VE groups, the body weight, cardiac index, left ventricular fibrosis and oxidative/antioxidative dysfunction were ameliorated .Pro, Praz and Pro +Praz increased the activity of Na +-K+ATPase and Ca2+-Mg2+ATPase.Treatment with Pro+Praz showed the best result in all of the indexes (P<0.05).CONCLU-SION:The dependence of adrenoceptor regulation plays an important role in the formation of oxidative stress in the process of rat cardiac injury induced by high sympathetic activity .
RESUMO
objective:To investigate the effect and mechanism of Jianguguben capsule on osteoporosis induced by retinoic acid in rats.Methods:The rats were given retinoic acid 75mg(kg/d)for 2 weeks by intragastric administration,at the same time treated with different drugs according to various groups consecutive for 4 weeks.The bone mine density(BMD)and bone mine capacity(BMC)were assayed by double energy X-ray bone-densitometry equipment,the blood was collected to assay the activity of StrACP in serum,and the hydroxyproline(HOP)contents of femur by commercial kits,the bone’s biomechanics of femur were detected.Results:Jianguguben capsule could significantly improve the bone’s biomechanics,increase the BMD, BMC,index of dry femur’weight,the contents of HOP in femur significantly,and remarkable decrease the level of StrACP in serum of the osteoporotic rats induced by retinoic acid.Conclusion:Jiangguguben capsule has anti-osteoporotic effect on osteoporotic rats induced by retinoic acid.