Recent evidence exists that enoxaparin can reduce brain injury because of its anticoagulant activity. To investigate the potential therapeutic effect of enoxaparin on cold-induced traumatic brain injury, at 20 minutes...Recent evidence exists that enoxaparin can reduce brain injury because of its anticoagulant activity. To investigate the potential therapeutic effect of enoxaparin on cold-induced traumatic brain injury, at 20 minutes after modeling, male BALB/c mouse models of cold-induced traumatic brain injury were intraperitoneally administered 3 and 10 mg/kg enoxaparin or isotonic saline solution. Twenty-four hours later, enoxaparin at 10 mg/kg greatly reduced infarct volume, decreased cell apoptosis in the cortex and obviously increased serum level of total antioxidant status. By contrast, administration of enoxaparin at 3 mg/kg did not lead to these changes. These findings suggest that enoxaparin exhibits neuroprotective effect on cold-induced traumatic brain injury in a dose-dependent manner.展开更多
Cold-inducible RNA-binding protein（CIRP）, a key regulatory protein, could be facilitated by mild hypothermia in the brain, heart and liver. This study observed the effects of mild hypothermia at 31 ± 0.5℃ on t...Cold-inducible RNA-binding protein（CIRP）, a key regulatory protein, could be facilitated by mild hypothermia in the brain, heart and liver. This study observed the effects of mild hypothermia at 31 ± 0.5℃ on traumatic brain injury in rats. Results demonstrated that mild hypothermia suppressed apoptosis in the cortex, hippocampus and hypothalamus, facilitated CIRP m RNA and protein expression in these regions, especially in the hypothalamus. The anti-apoptotic effect of mild hypothermia disappeared after CIRP silencing. There was no correlation between mitogen-activated extracellular signal-regulated kinase activation and CIRP silencing. CIRP silencing inhibited extracellular signal-regulated kinase-1/2 activation. These indicate that CIRP inhibits apoptosis by affecting extracellular signal-regulated kinase-1/2 activation, and exerts a neuroprotective effect during mild hypothermia for traumatic brain injury.展开更多
目的:观察小鼠急性脑外伤后,冷诱导RNA结合蛋白(CIRP)的表达变化情况及其对炎症因子的影响,旨在探讨CIRP在神经系统损伤性疾病中的作用,为该疾病的临床治疗提供新的思路。方法:成年小鼠随机分为正常组(n=10)和手术组(n=36),用液压打击...目的:观察小鼠急性脑外伤后,冷诱导RNA结合蛋白(CIRP)的表达变化情况及其对炎症因子的影响,旨在探讨CIRP在神经系统损伤性疾病中的作用,为该疾病的临床治疗提供新的思路。方法:成年小鼠随机分为正常组(n=10)和手术组(n=36),用液压打击法建立小鼠急性脑外伤模型,利用HE染色法观察模型建立后小鼠大脑的损伤情况;损伤后24、48 h时间点,采用实时PCR检测大脑损伤部位CIRP和炎症因子肿瘤坏死因子α(TNFα)m RNA的表达,免疫组织化学法检测CIRP蛋白水平的表达;分析CIRP表达变化与炎症因子TNFα相关性。结果:急性脑外伤后小鼠脑损伤部位的CIRP m RNA及蛋白表达水平呈上升趋势,CIRP表达与炎症因子TNFα表达正相关。结论:CIRP可能参与了小鼠脑外伤的炎性反应过程。展开更多
文摘Recent evidence exists that enoxaparin can reduce brain injury because of its anticoagulant activity. To investigate the potential therapeutic effect of enoxaparin on cold-induced traumatic brain injury, at 20 minutes after modeling, male BALB/c mouse models of cold-induced traumatic brain injury were intraperitoneally administered 3 and 10 mg/kg enoxaparin or isotonic saline solution. Twenty-four hours later, enoxaparin at 10 mg/kg greatly reduced infarct volume, decreased cell apoptosis in the cortex and obviously increased serum level of total antioxidant status. By contrast, administration of enoxaparin at 3 mg/kg did not lead to these changes. These findings suggest that enoxaparin exhibits neuroprotective effect on cold-induced traumatic brain injury in a dose-dependent manner.
基金supported by the National Natural Science Foundation of China,No.81303091
文摘Cold-inducible RNA-binding protein（CIRP）, a key regulatory protein, could be facilitated by mild hypothermia in the brain, heart and liver. This study observed the effects of mild hypothermia at 31 ± 0.5℃ on traumatic brain injury in rats. Results demonstrated that mild hypothermia suppressed apoptosis in the cortex, hippocampus and hypothalamus, facilitated CIRP m RNA and protein expression in these regions, especially in the hypothalamus. The anti-apoptotic effect of mild hypothermia disappeared after CIRP silencing. There was no correlation between mitogen-activated extracellular signal-regulated kinase activation and CIRP silencing. CIRP silencing inhibited extracellular signal-regulated kinase-1/2 activation. These indicate that CIRP inhibits apoptosis by affecting extracellular signal-regulated kinase-1/2 activation, and exerts a neuroprotective effect during mild hypothermia for traumatic brain injury.
文摘目的:观察小鼠急性脑外伤后,冷诱导RNA结合蛋白(CIRP)的表达变化情况及其对炎症因子的影响,旨在探讨CIRP在神经系统损伤性疾病中的作用,为该疾病的临床治疗提供新的思路。方法:成年小鼠随机分为正常组(n=10)和手术组(n=36),用液压打击法建立小鼠急性脑外伤模型,利用HE染色法观察模型建立后小鼠大脑的损伤情况;损伤后24、48 h时间点,采用实时PCR检测大脑损伤部位CIRP和炎症因子肿瘤坏死因子α(TNFα)m RNA的表达,免疫组织化学法检测CIRP蛋白水平的表达;分析CIRP表达变化与炎症因子TNFα相关性。结果:急性脑外伤后小鼠脑损伤部位的CIRP m RNA及蛋白表达水平呈上升趋势,CIRP表达与炎症因子TNFα表达正相关。结论:CIRP可能参与了小鼠脑外伤的炎性反应过程。
