目的:探讨生长分化因子15对心肌梗死大鼠的作用。方法:18只SPF级雄性SD大鼠根据随机数字表法分为模型组、实验组(A组GDF-15低剂量组10 ng/mL、B组GDF-15高剂量组50 ng/mL),每组6只,适应性喂养1周后,每天给药1次,连续1周,末次给药6 h后,...目的:探讨生长分化因子15对心肌梗死大鼠的作用。方法:18只SPF级雄性SD大鼠根据随机数字表法分为模型组、实验组(A组GDF-15低剂量组10 ng/mL、B组GDF-15高剂量组50 ng/mL),每组6只,适应性喂养1周后,每天给药1次,连续1周,末次给药6 h后,各组大鼠均结扎冠状动脉左前降支进行心肌梗死造模。采用TUNEL/DAPI双染色法观察大鼠心肌细胞凋亡情况,分别统计凋亡细胞数及细胞总数,计算出细胞凋亡率。结果:与模型组相比,对照组B的细胞凋亡率显著减少(P Objective: To investigate the effect of growth differentiation factor 15 on myocardial infarction in rats. Methods: 18 SPF grade male SD rats were divided into model group and experimental group according to random number table method (group A, low-dose GDF-15 group, 10 ng/mL, group B, high-dose GDF-15 group, 50 ng/mL), with 6 rats in each group. After adaptive feeding for 1 week, the rats were given the drug once a day for 1 week. The left anterior descending branch of the coronary artery was lapped in each group for myocardial infarction modeling. TUNEL/DAPI double staining was used to observe the apoptosis of rat cardiomyocytes. The number of apoptotic cells and the total number of apoptotic cells were counted, and the apoptosis rate was calculated. Results: Compared with model group, the apoptosis rate of control group B was significantly decreased (P < 0.01), and GDF-15 reduced the apoptosis rate in a dose-dependent manner (P < 0.05). Conclusion: Growth differentiation factor 15 can reduce apoptosis in rats with myocardial infarction.展开更多
目的探讨针刺对脑心综合征大鼠脑组织细胞凋亡、炎症因子及丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPK)/核因子-κB(nuclear factor-κB,NF-κB)/激活蛋白-1(activator protein-1,AP-1)信号通路的影响。方法将36只SD...目的探讨针刺对脑心综合征大鼠脑组织细胞凋亡、炎症因子及丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPK)/核因子-κB(nuclear factor-κB,NF-κB)/激活蛋白-1(activator protein-1,AP-1)信号通路的影响。方法将36只SD大鼠随机分为针刺组、模型组和对照组,各12只。采用胶原酶加肝素联合注射大鼠尾状核制备脑心综合征大鼠模型,对照组给予等剂量生理盐水向大鼠尾状核注入,手术操作过程同模型组。模型组和假手术组均不予针刺;针刺组选心俞穴、内关穴、风府穴和水沟穴,每日针刺1次,连续3天。采用原位末端凋亡(TdT-mediated dUTP-biotin nick end labeling,TUNEL)法测定脑组织细胞凋亡情况;神经功能采用Zea-Longa法评估;运用酶联免疫法测定白细胞介素(interleukin,IL)-1β、IL-6和肿瘤坏死因子(tumor necrosis factor,TNF)-α水平;采用Western Blot法测定MAPK、NF-κB、AP-1蛋白表达。结果模型组和针刺组大鼠脑组织细胞凋亡指数(apoptosis index,AI)高于假手术组(P<0.05);针刺组大鼠脑组织AI低于模型组(P<0.05)。模型组大鼠神经行为评分高于假手术组(P<0.05);针刺组大鼠神经行为评分低于模型组(P<0.05)。模型组大鼠IL-1β、IL-6和TNF-α水平高于假手术组(P<0.05);针刺组大鼠IL-1β、IL-6和TNF-α水平低于模型组(P<0.05)。模型组大鼠MAPK蛋白灰度值、NF-κB蛋白灰度值和AP-1蛋白灰度值高于假手术组(P<0.05);针刺组大鼠MAPK蛋白灰度值、NF-κB蛋白灰度值和AP-1蛋白灰度值低于模型组(P<0.05)。结论脑心综合征大鼠采用针刺可减轻大鼠脑组织细胞凋亡,减轻大鼠炎症因子,且可下调MAPK/NF-κB/AP-1信号通路表达。展开更多
文摘目的:探讨生长分化因子15对心肌梗死大鼠的作用。方法:18只SPF级雄性SD大鼠根据随机数字表法分为模型组、实验组(A组GDF-15低剂量组10 ng/mL、B组GDF-15高剂量组50 ng/mL),每组6只,适应性喂养1周后,每天给药1次,连续1周,末次给药6 h后,各组大鼠均结扎冠状动脉左前降支进行心肌梗死造模。采用TUNEL/DAPI双染色法观察大鼠心肌细胞凋亡情况,分别统计凋亡细胞数及细胞总数,计算出细胞凋亡率。结果:与模型组相比,对照组B的细胞凋亡率显著减少(P Objective: To investigate the effect of growth differentiation factor 15 on myocardial infarction in rats. Methods: 18 SPF grade male SD rats were divided into model group and experimental group according to random number table method (group A, low-dose GDF-15 group, 10 ng/mL, group B, high-dose GDF-15 group, 50 ng/mL), with 6 rats in each group. After adaptive feeding for 1 week, the rats were given the drug once a day for 1 week. The left anterior descending branch of the coronary artery was lapped in each group for myocardial infarction modeling. TUNEL/DAPI double staining was used to observe the apoptosis of rat cardiomyocytes. The number of apoptotic cells and the total number of apoptotic cells were counted, and the apoptosis rate was calculated. Results: Compared with model group, the apoptosis rate of control group B was significantly decreased (P < 0.01), and GDF-15 reduced the apoptosis rate in a dose-dependent manner (P < 0.05). Conclusion: Growth differentiation factor 15 can reduce apoptosis in rats with myocardial infarction.
文摘目的探讨针刺对脑心综合征大鼠脑组织细胞凋亡、炎症因子及丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPK)/核因子-κB(nuclear factor-κB,NF-κB)/激活蛋白-1(activator protein-1,AP-1)信号通路的影响。方法将36只SD大鼠随机分为针刺组、模型组和对照组,各12只。采用胶原酶加肝素联合注射大鼠尾状核制备脑心综合征大鼠模型,对照组给予等剂量生理盐水向大鼠尾状核注入,手术操作过程同模型组。模型组和假手术组均不予针刺;针刺组选心俞穴、内关穴、风府穴和水沟穴,每日针刺1次,连续3天。采用原位末端凋亡(TdT-mediated dUTP-biotin nick end labeling,TUNEL)法测定脑组织细胞凋亡情况;神经功能采用Zea-Longa法评估;运用酶联免疫法测定白细胞介素(interleukin,IL)-1β、IL-6和肿瘤坏死因子(tumor necrosis factor,TNF)-α水平;采用Western Blot法测定MAPK、NF-κB、AP-1蛋白表达。结果模型组和针刺组大鼠脑组织细胞凋亡指数(apoptosis index,AI)高于假手术组(P<0.05);针刺组大鼠脑组织AI低于模型组(P<0.05)。模型组大鼠神经行为评分高于假手术组(P<0.05);针刺组大鼠神经行为评分低于模型组(P<0.05)。模型组大鼠IL-1β、IL-6和TNF-α水平高于假手术组(P<0.05);针刺组大鼠IL-1β、IL-6和TNF-α水平低于模型组(P<0.05)。模型组大鼠MAPK蛋白灰度值、NF-κB蛋白灰度值和AP-1蛋白灰度值高于假手术组(P<0.05);针刺组大鼠MAPK蛋白灰度值、NF-κB蛋白灰度值和AP-1蛋白灰度值低于模型组(P<0.05)。结论脑心综合征大鼠采用针刺可减轻大鼠脑组织细胞凋亡,减轻大鼠炎症因子,且可下调MAPK/NF-κB/AP-1信号通路表达。