Changes of intracellular Ca 2+ ,pH value and mitochondria membrane potential(△Ψ m) in the apoptosis of MGC 803 cells induced by water soluble constituents of Glycyrrhiza uralensis Fisch(WSCG) were investigated.MGC 8...Changes of intracellular Ca 2+ ,pH value and mitochondria membrane potential(△Ψ m) in the apoptosis of MGC 803 cells induced by water soluble constituents of Glycyrrhiza uralensis Fisch(WSCG) were investigated.MGC 803 cells were incubated with 0.5,0.75,1.0 and 1.5 g/L WSCG for 1,4,7,11,15,19 and 23 hours respectively.The percentage of apoptosis and intracellular Ca 2+ content increased in a dose and time dependent manner,except that the intracellular Ca 2+ content of 1.5 g/L WSCG treated cells started to decrease after 11 hours.The cells were alkalized after various treatments,except that 1.5 g/L WSCG treated cells turned to acidify after 11 hours.It was found that the mitochondria △Ψ m of all treated cells decreased drastically at the first hour,then kept decreasing slowly until the 23rd hour.The results indicated that intracellular Ca 2+ ,pH and mitochondria △Ψ m all played pivotal roles in the apoptosis of MGC 803 cells induced by WSCG.展开更多
目的观察大鼠急性重症胰腺炎(severe acute pancreatitis,SAP)胰腺组织损伤时腺泡细胞线粒体膜电位(mitochon-drial membrane potential,△Ψm)及caspase3表达的变化,探讨褪黑素(melatonin,MT)对大鼠急性重症胰腺炎胰腺损伤的保护作用...目的观察大鼠急性重症胰腺炎(severe acute pancreatitis,SAP)胰腺组织损伤时腺泡细胞线粒体膜电位(mitochon-drial membrane potential,△Ψm)及caspase3表达的变化,探讨褪黑素(melatonin,MT)对大鼠急性重症胰腺炎胰腺损伤的保护作用。方法取雄性SD大鼠48只,采用随机区组设计,随机分为假手术组(SO)、急性重症胰腺炎组(SAP)、褪黑素干预组(MT),采取经胰管注射4%牛黄胆酸钠法制造大鼠重症胰腺炎模型,造模成功后4h、10h处死大鼠,各组各时点8只。检测血清淀粉酶,苏木精-伊红染色观察胰腺病理变化,流式细胞术检测不同时间段腺泡细胞线粒体膜电位,Realtime-PCR检测caspase3的表达。结果与假手术组对照,急性重症胰腺炎诱导后4h、10h线粒体膜电位明显降低(1.579±0.103 vs 8.037±1.001,0.059±0.021 vs 8.508±0.494,P<0.01),caspase3相对表达量增多(1.470±0.173,1.700±0.180,P<0.01);与急性重症胰腺炎组相比,褪黑素治疗组4h、10h线粒体膜电位明显降低(0.580±0.107 vs 1.579±0.103,0.019±0.010 vs 0.059±0.021,P<0.01),caspase3相对表达量增多(2.069±0.282,2.520±0.296,P<0.01)。结论褪黑素可促进急性重症胰腺炎线粒体膜电位的降低及caspase3的表达增多,诱导细胞凋亡,对急性重症胰腺炎有保护作用。展开更多
文摘Changes of intracellular Ca 2+ ,pH value and mitochondria membrane potential(△Ψ m) in the apoptosis of MGC 803 cells induced by water soluble constituents of Glycyrrhiza uralensis Fisch(WSCG) were investigated.MGC 803 cells were incubated with 0.5,0.75,1.0 and 1.5 g/L WSCG for 1,4,7,11,15,19 and 23 hours respectively.The percentage of apoptosis and intracellular Ca 2+ content increased in a dose and time dependent manner,except that the intracellular Ca 2+ content of 1.5 g/L WSCG treated cells started to decrease after 11 hours.The cells were alkalized after various treatments,except that 1.5 g/L WSCG treated cells turned to acidify after 11 hours.It was found that the mitochondria △Ψ m of all treated cells decreased drastically at the first hour,then kept decreasing slowly until the 23rd hour.The results indicated that intracellular Ca 2+ ,pH and mitochondria △Ψ m all played pivotal roles in the apoptosis of MGC 803 cells induced by WSCG.
文摘目的观察大鼠急性重症胰腺炎(severe acute pancreatitis,SAP)胰腺组织损伤时腺泡细胞线粒体膜电位(mitochon-drial membrane potential,△Ψm)及caspase3表达的变化,探讨褪黑素(melatonin,MT)对大鼠急性重症胰腺炎胰腺损伤的保护作用。方法取雄性SD大鼠48只,采用随机区组设计,随机分为假手术组(SO)、急性重症胰腺炎组(SAP)、褪黑素干预组(MT),采取经胰管注射4%牛黄胆酸钠法制造大鼠重症胰腺炎模型,造模成功后4h、10h处死大鼠,各组各时点8只。检测血清淀粉酶,苏木精-伊红染色观察胰腺病理变化,流式细胞术检测不同时间段腺泡细胞线粒体膜电位,Realtime-PCR检测caspase3的表达。结果与假手术组对照,急性重症胰腺炎诱导后4h、10h线粒体膜电位明显降低(1.579±0.103 vs 8.037±1.001,0.059±0.021 vs 8.508±0.494,P<0.01),caspase3相对表达量增多(1.470±0.173,1.700±0.180,P<0.01);与急性重症胰腺炎组相比,褪黑素治疗组4h、10h线粒体膜电位明显降低(0.580±0.107 vs 1.579±0.103,0.019±0.010 vs 0.059±0.021,P<0.01),caspase3相对表达量增多(2.069±0.282,2.520±0.296,P<0.01)。结论褪黑素可促进急性重症胰腺炎线粒体膜电位的降低及caspase3的表达增多,诱导细胞凋亡,对急性重症胰腺炎有保护作用。
