目的探究沉默信息调节因子(silent information regulation 1,SIRT1)介导的凋亡相关通路在七氟醚后处理对失血性休克复苏小鼠海马神经元损伤中的保护作用。方法建立失血性休克与复苏小鼠模型,雄性C57BL/6J小鼠60只随机分为:假手术组(Sha...目的探究沉默信息调节因子(silent information regulation 1,SIRT1)介导的凋亡相关通路在七氟醚后处理对失血性休克复苏小鼠海马神经元损伤中的保护作用。方法建立失血性休克与复苏小鼠模型,雄性C57BL/6J小鼠60只随机分为:假手术组(Sham组)、HSR组(Shock组)、七氟醚处理组(Sevo组)、七氟醚联合SIRT1特异性抑制剂处理组(EX527+Sevo组)以及EX527处理组(EX527组)。通过TTC染色法检测小鼠脑梗死体积,TUNEL染色法检测各组小鼠海马神经细胞的变化,水迷宫实验检测小鼠学习记忆能力,Western blot检测SIRT1和凋亡相关蛋白Bcl-2、Bax、Cleaved caspase-3的表达。结果造模小鼠在水迷宫检测中到达平台的潜伏期延长,在目标象限的运动距离减少,脑梗死体积增大,TUNEL染色阳性细胞数增多,SIRT1、Bcl-2蛋白表达降低,Bax、Cleaved-caspase3蛋白表达增加;七氟醚处理后改善了失血性休克与复苏小鼠的神经损伤情况,七氟醚与SIRT1抑制剂EX527联合处理后,七氟醚对失血性休克与复苏小鼠的神经损伤保护作用减弱。结论七氟醚可能通过SIRT1介导的凋亡相关通路发挥对失血性休克复苏引起的海马神经元损伤的保护作用。展开更多
The selection for large and small relative brain weight (RBW) in mice, started in 1999, resulted in stable significant differences in the trait (16%). The selection was discontinued at F22, and both lines (Large Brain...The selection for large and small relative brain weight (RBW) in mice, started in 1999, resulted in stable significant differences in the trait (16%). The selection was discontinued at F22, and both lines (Large Brain, LB and Small brain, SB) were maintained by random mating. In F25-F28 the significant differences in RBW were still present in spite of the lack of selection. In F28 ethanol injections (2.4 mg/kg, 12% ethanol, i.p.) were performed to animals of both lines. The ethanol effects were more intense in SB, than in LB line. Mice were tested in elevated and closed plus-mazes and in slip-funnel tests. Control LB mice explored new environment more actively and were less affected by stressful environment than SBs. SB ethanol mice were less anxious in elevated plus maze, initiated closed maze exploration earlier, moved more vividly and demonstrated lower anxiety level in elevated plus maze than saline injected mice, while changes in these behaviors after ethanol were not so clear in LB mice, although their locomotion level increased.展开更多
文摘The selection for large and small relative brain weight (RBW) in mice, started in 1999, resulted in stable significant differences in the trait (16%). The selection was discontinued at F22, and both lines (Large Brain, LB and Small brain, SB) were maintained by random mating. In F25-F28 the significant differences in RBW were still present in spite of the lack of selection. In F28 ethanol injections (2.4 mg/kg, 12% ethanol, i.p.) were performed to animals of both lines. The ethanol effects were more intense in SB, than in LB line. Mice were tested in elevated and closed plus-mazes and in slip-funnel tests. Control LB mice explored new environment more actively and were less affected by stressful environment than SBs. SB ethanol mice were less anxious in elevated plus maze, initiated closed maze exploration earlier, moved more vividly and demonstrated lower anxiety level in elevated plus maze than saline injected mice, while changes in these behaviors after ethanol were not so clear in LB mice, although their locomotion level increased.
