【目的】探讨心康片对阿霉素诱导的慢性心力衰竭(简称心衰)大鼠心肌细胞凋亡率、胶原容积分数、肌浆网Ca2+-ATP酶活性的影响。【方法】采用SD大鼠腹腔内注射阿霉素法复制心衰大鼠模型。于造模成功后,随机分为5组:模型组,西药组,中药低...【目的】探讨心康片对阿霉素诱导的慢性心力衰竭(简称心衰)大鼠心肌细胞凋亡率、胶原容积分数、肌浆网Ca2+-ATP酶活性的影响。【方法】采用SD大鼠腹腔内注射阿霉素法复制心衰大鼠模型。于造模成功后,随机分为5组:模型组,西药组,中药低、中、高剂量组,每组10只,分别给予蒸馏水,地高辛混悬液(22.5μg/kg),心康片水溶液(9、18、36 g/kg),将以上各药物应用蒸馏水稀释成等体积10 m L/kg灌胃,每日1次,连续给药5周。另随机选取同批次大鼠10只进入假手术组,腹腔内注射等量生理盐水,蒸馏水灌胃。通过TUNEL法检测大鼠心肌细胞凋亡率、Masson三色染色后计算大鼠心肌胶原容积分数(CVF)、定磷法测定肌浆网Ca2+-ATP酶(SERCA2a)活性。【结果】与假手术组比较,模型组心肌细胞凋亡率、CVF均显著升高(P<0.01),提示心衰大鼠发生了病理性心肌重构;与模型组比较,西药组与中药低、中、高剂量组心肌细胞凋亡率显著下降(P<0.01),提示地高辛与心康片均能一定程度上减少细胞凋亡。西药组与中剂量、高剂量中药组的心肌胶原容积分数均低于模型组(P<0.05或P<0.01),可见地高辛与心康片均可显著延缓心肌细胞的纤维化。同时,中药中、高剂量组心肌细胞SERCA2a活性均显著高于模型组(P<0.05或P<0.01),提示心康片可能通过调节SERCA2a活性的途径,从而减轻心肌重构,改善心脏功能。【结论】心康片可能通过调节SERCA2a活性降低心肌细胞凋亡率和心肌细胞容积分数,具有抗心肌细胞凋亡、抗心肌纤维化的作用,从而延缓心肌间质重构。展开更多
AIM To investigate the morphologic changes of the myocardium and its relationship to serum bile acids in obstructive jaundice. METHODS Part Ⅰ: 35 rats were randomly assigned to three groups: Group Ⅰ (BDL1, n =...AIM To investigate the morphologic changes of the myocardium and its relationship to serum bile acids in obstructive jaundice. METHODS Part Ⅰ: 35 rats were randomly assigned to three groups: Group Ⅰ (BDL1, n =11), the common bile duct (CBD) was ligated and severed and killed after one week. Group Ⅱ (BDL2, n =11), the CBD was ligated and severed and killed after two weeks. Group Ⅲ (SO, n =13), the CBD was simply isolated. The hearts were taken for morphologic studies and blood was taken to determine the total serum bile acids (TAB). Part Ⅱ: 13 rats received gastric intubation of 10% 4ml/kg of sodium cholate, and their serum TBA and the morphologic changes of the heart were examined. RESULTS One to two weeks after the CBD was ligated and severed, the mitochondrium of the myocardium was damaged and the serum TBA obviously increased. When the rats were administered sodium cholate to make their peak blood concentration close to the average blood concentration in BDL2, their myocardium was damaged in a similar degree. CONCLUSION The myocardium was damaged in obstructive jaundice and the endogenous bile acids was one of the factors.展开更多
文摘【目的】探讨心康片对阿霉素诱导的慢性心力衰竭(简称心衰)大鼠心肌细胞凋亡率、胶原容积分数、肌浆网Ca2+-ATP酶活性的影响。【方法】采用SD大鼠腹腔内注射阿霉素法复制心衰大鼠模型。于造模成功后,随机分为5组:模型组,西药组,中药低、中、高剂量组,每组10只,分别给予蒸馏水,地高辛混悬液(22.5μg/kg),心康片水溶液(9、18、36 g/kg),将以上各药物应用蒸馏水稀释成等体积10 m L/kg灌胃,每日1次,连续给药5周。另随机选取同批次大鼠10只进入假手术组,腹腔内注射等量生理盐水,蒸馏水灌胃。通过TUNEL法检测大鼠心肌细胞凋亡率、Masson三色染色后计算大鼠心肌胶原容积分数(CVF)、定磷法测定肌浆网Ca2+-ATP酶(SERCA2a)活性。【结果】与假手术组比较,模型组心肌细胞凋亡率、CVF均显著升高(P<0.01),提示心衰大鼠发生了病理性心肌重构;与模型组比较,西药组与中药低、中、高剂量组心肌细胞凋亡率显著下降(P<0.01),提示地高辛与心康片均能一定程度上减少细胞凋亡。西药组与中剂量、高剂量中药组的心肌胶原容积分数均低于模型组(P<0.05或P<0.01),可见地高辛与心康片均可显著延缓心肌细胞的纤维化。同时,中药中、高剂量组心肌细胞SERCA2a活性均显著高于模型组(P<0.05或P<0.01),提示心康片可能通过调节SERCA2a活性的途径,从而减轻心肌重构,改善心脏功能。【结论】心康片可能通过调节SERCA2a活性降低心肌细胞凋亡率和心肌细胞容积分数,具有抗心肌细胞凋亡、抗心肌纤维化的作用,从而延缓心肌间质重构。
文摘AIM To investigate the morphologic changes of the myocardium and its relationship to serum bile acids in obstructive jaundice. METHODS Part Ⅰ: 35 rats were randomly assigned to three groups: Group Ⅰ (BDL1, n =11), the common bile duct (CBD) was ligated and severed and killed after one week. Group Ⅱ (BDL2, n =11), the CBD was ligated and severed and killed after two weeks. Group Ⅲ (SO, n =13), the CBD was simply isolated. The hearts were taken for morphologic studies and blood was taken to determine the total serum bile acids (TAB). Part Ⅱ: 13 rats received gastric intubation of 10% 4ml/kg of sodium cholate, and their serum TBA and the morphologic changes of the heart were examined. RESULTS One to two weeks after the CBD was ligated and severed, the mitochondrium of the myocardium was damaged and the serum TBA obviously increased. When the rats were administered sodium cholate to make their peak blood concentration close to the average blood concentration in BDL2, their myocardium was damaged in a similar degree. CONCLUSION The myocardium was damaged in obstructive jaundice and the endogenous bile acids was one of the factors.
文摘【目的】探讨补肾活血化痰法改善自发性高血压大鼠(SHR)左心室纤维化机制。【方法】选用20只自发性高血压大鼠,随机分为模型组和中药组,10只WKY大鼠(Wistar-Kyoto rat)作为正常对照组。干预12周后,应用Masson染色法检测大鼠左心室纤维化程度,逆转录—聚合酶链反应(RT-PCR)法检测大鼠左心室Smad3 m RNA表达水平,Western blot法检测大鼠左心室Smad3表达水平。【结果】中药组大鼠心肌纤维化水平、Smad3蛋白表达水平、Smad3基因表达水平显著低于模型组(均P<0.05)。【结论】补肾活血化痰法可能通过抑制Smad3表达改善自发性高血压大鼠左心室纤维化进程。
