益精口服液对高脂饲料及运动锻炼大鼠生理机能的影响
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摘要
中药益精口服液是由归芪益母汤裁化而来,归芪益母汤源于清代沈莲舫的《牛经备要医方》,由当归、黄芪、益母草3味中药组成。单味中药的现代药理研究表明本方诸药分别具有保护心血管系统、免疫调节、抗疲劳、耐缺氧、抗氧化、降血脂等作用;成方研究结果表明,益精口服液具有抗疲劳、耐缺氧、抗氧化、免疫调节、迅速降低产后气虚血瘀证血浆一氧化氮含量等作用。本方在兽医临床上主要用于治疗产科方面的病症。虽然基础原方出自兽医典籍,在兽医临床上应用较多,但对其作用机理的研究较少。
     本项目的目的是通过研究益精口服液对摄入高脂、运动锻炼大鼠抗运动性疲劳、肝肾等脏器系统功能及机体免疫系统的影响,来探讨其抗疲劳、保肝护肾、抗动脉粥样硬化、免疫调节的作用效果。主要完成了益精口服液对运动性疲劳、肝肾功能及血脂相关生理生化参数、肝肾等脏器病理学变化及动、静脉内膜形态学变化和机体细胞免疫、体液免疫的影响等四个方面的研究。
     为了观察益精口服液对运动性疲劳的影响,我们采用大鼠负重(5%体重)极限游泳方法测试极限游泳存活的时间。结果显示,益精口服液连续3w灌胃后,试验组雌鼠极限游泳时间与空白组相比明显延长,其中中剂量益精口服液组雌鼠极限游泳时间(1842.75s)较之空白组(303.33s)有极显著差异。说明益精口服液对雌鼠有明显的抗疲劳作用。
     为了观察长期服用益精口服液对肝肾功能、血脂代谢的影响及是否有毒副作用,我们使用生物化学方法检测了大鼠服药一定时间后反映其肝脏、肾脏、肌肉等组织器官机能状态的天门冬氨酸氨基转移酶(AST)、丙氨酸氨基转移酶(ALT)、尿酸(UA)、尿素(Urea)、肌酐(Cre)、肌酸激酶(CK)、乳酸脱氢酶(LDH)、甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白(LDL)、高密度脂蛋白(HDL)、直接胆红素(D-BIL)、总胆红素(T-BIL)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、肝糖原等指标。结果表明,益精口服液连续灌胃3w,可明显降低模型组大鼠血清中ALT、UA、CK、TC、HDL、LDL的含量,说明益精口服液具有一定的保肝、护肾、调节血脂等功效;连续灌胃8w的中剂量益精口服液对大鼠肝、肾等主要生理生化指标没有明显影响,说明益精口服液在实验条件下长期服用对肝功能和肾功能等未表现毒副作用。
     为了观察益精口服液对肝肾等脏器组织学变化的影响和对动脉、静脉内膜的影响,我们采用常规切片观察肝肾等脏器的组织变化,用扫描电子显微镜观察心主动脉、肝门静脉内膜形态的变化。结果显示:益精口服液可以明显缓解高脂血症模型组大鼠肝、肾组织细胞的脂肪空泡变性;减少高脂模型组大鼠心主动脉、肝门静脉内膜表面的沉积物,改善内膜的光滑度以及内皮细胞的有序排列,减轻内膜松网状、蚀斑样变化。提示益精口服液具有保护肝肾组织,预防其细胞脂肪变性和抗主动脉粥样硬化的作用。
     为了研究益精口服液对运动性疲劳状态下机体免疫力的影响,我们观察了各实验组大鼠外周血T淋巴细胞亚群动态变化、血清总蛋白(TP)、白蛋白(ALB)含量的变化。结果显示,益精口服液对CD4+ T细胞的调节不明显,对CD8+ T细胞有明显的抑制作用,从而提高CD4+/CD8+比值;对血清TP、ALB的含量没有明显的影响。说明益精口服液对机体的免疫调节主要是通过降低CD8+ T细胞的百分比,提高CD4+/CD8+比值来调节机体免疫力,而对体液免疫的影响不明显。
     以上实验结果表明:益精口服液对雌鼠具有明显的抗疲劳作用;对摄入高能及运动锻炼大鼠,具有明显调节血脂、改善血清生理生化、保肝护肾、抗动脉粥样硬化和调节机体免疫等作用。且连续8w灌胃给药,对大鼠肝功能和肾功能等未发现毒副作用。
Yi-Jing is a traditional Chinese medicine oral solution. It is derived from Gui Qi Yimu Decoction which was first described during Qing Dynasty by Shen Lianfang in《Niu Jing Bei Yao Yi Fang》and is composed of Danggui (Radix Angelicae Sinensisi), Huangqi (Radix Astragali) and Yimucao (Leonurus heterophllus). Pharmacological studies on the three traditional Chinese medicines composing this formula have shown that they have many therapeutic effects such as cardiovascular protective function, immunomodulatory, anti-fatigue, anti-hypoxia, antioxidant, and blood lipid regulating effects. As a formula, its reported therapeutic effects include ant-fatigue, anti-hypoxia, a ntioxidant, immunomodulatory effects in addition to its role in reducing seriousness of postpartum complications. Although this formula is often used in clinical veterinary, mainly for the treatment of Gynaecological conditions, only few studies have been carried out so far to elucidate its mechanism of action.
     The present study was conducted to investigate the anti-fatigue, hepatorenal protective, anti-atherosclerotic, and immunomodulatory effects of Yi-jing oral solution by studying its effects on resistance to exercise-induced fatigue, immune system and hepatorenal function of rats fed with high lipid diet and subjected to exercise training. It includes four parts: monitoring of biochemical parameters reflecting hepatorenal function, observation of pathomorphological changes in liver and kidney, evaluation of intima morphological changes, and investigation of the effect on the immune system.
     To observe the effect of Yi-jing oral solution on exercise-induced fatigue, Swimming times to exhaustion were measured for rate with a load of 5% of body weights attached to their tails. The results show that the swimming time to exhaustion of rats administered Yi-jing oral solution for three weeks was significantly longer than that of control group. The difference was very significant between treated female group (1842.75s) and control group (303.33s). This indicates that Yi-jing oral solution has a significant anti-fatigue effect on female rats.
     To observe the effect of long-time administration of Yi-jing oral solution on hepatorenal function and lipid metabolism and investigate whether or not it has any side effect, biochemical parameters reflecting hepatorenal function, and muscle tissue integrity (AST, ALT, UA, Urea, Cre, CK, LDH, TG, TC, LDL, HDL, D-BIL, T-BIL, HDL-C, LDL-C and hepatic glycogen) were monitored. The results show that the oral administration of Yi-jing oral solution once daily for 3 consecutive weeks significantly reduces the serum level of ALT、UA、CK、TC、HDL、LDL in treated rats compared to control group, indicating that Yi-jing oral solution has a certain role in protecting hepatorenal function and regulating lipid metabolism. Moreover, oral administration once daily for 8 weeks does not have any significant effect on main physiobiochemical parameters of liver and kidney, suggesting that, under the experiment conditions, long-time administration of Yi-jing oral solution has no side effect on hepatorenal function.
     To assess whether the administration of Yi-jing oral solution cause any pathomorphological changes in liver and kidney, or induce any morphological changes in vessel endothelium, we examined histological sections of liver and kidney, and observed aorta and hepatic portal vein endothelial surface by scanning electron microscopy. The results show that Yi-jing oral solution significantly relieves hepatorenal fatty degeneration, reduces sediments in endothelial surface of aorta and hepatic portal vein, enhances smoothness of endothelial surface and endothelial cell arrangement, and alleviates plaque-like changes in rats fed with high lipid diet. This suggests that Yi-jing oral solution has a certain role in maintaining the integrity of hepatorenal tissue, preventive effect against fatty degeneration and anti-atherosclerotic function.
     Finally, we studied the effect of Yi-jing oral solution on the immune system under the condition of exercise-induced fatigue by examining its effect on dynamic changes of peripheral blood-T lymphocytes subpopulation, and the level of serum total protein and serum albumin. The results show that Yi-jing oral solution significantly decreases CD8+ T cell percentage, while it has no significant effect on CD4+ T cell percentage, which, as result, increases CD4+/CD8+ ratio. However, it does not have any significant effect neithier on serum total protein, nor serum albumin. This suggests that the main immune regulating effect of Yi-jing oral solution is through decreasing CD8+ T cell percentage and increasing CD4+/CD8+ ratio; the result doesn’t indicate any significant effect on the humoral immunity.
     Taken together, these results indicate that Yi-jing oral solution has a significant anti-fatigue effect on female rats; it also plays a significant role in regulating lipid metabolism, enhances physio-biochemicals parameters, protects hepatorenal function, and has anti-atherosclerotic and immune regulating effects in rats fed with high lipid diet and subjected to exercise training. Moreover, oral administration once daily for 8 weeks does not have any side effect on hepatorenal function.
引文
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