首页> 外文会议>Biomedical Engineering and Biotechnology (iCBEB), 2012 International Conference on >Recombinant Human Granulocyte-colony Stimulating Factor Prevents Cognition Impairment with Chronic Cerebral Ischemia by Promoting Astrocyte Proliferation and Anti-apoptosis in Rats
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Recombinant Human Granulocyte-colony Stimulating Factor Prevents Cognition Impairment with Chronic Cerebral Ischemia by Promoting Astrocyte Proliferation and Anti-apoptosis in Rats

机译:重组人粒细胞集落刺激因子通过促进大鼠星形胶质细胞增殖和抗凋亡,预防慢性脑缺血的认知障碍

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Recombinant human granulocyte-colony stimulating factor (rhG-CSF), a hemopoietic growth factor naturally generated within the body, has multiple neuroprotective activities. However, the effect of rhG-CSF on astrocyte proliferation and neural apoptosis in rats with chronic cerebral ischemia is unknown. We investigated the effect of rhG-CSF on cognitive function, astrocyte proliferation and neural apoptosis in rats with bilateral common carotid artery ligation (2-vessel occlusion, 2VO). Results from Morris water maze indicated that rhG-CSF treatment shortened the escape latency. For the probe trial, spatial memory was significantly lower for saline-treated 2VO rats than sham-operated and rhG-CSF--treated 2VO rats. Histology revealed the number of pyramidal cells in CA1 region lower in 2VO than sham-operated rats, administration of rhG-CSF prevented the neural loss induced by chronic cerebral ischemia. Immunohistochemistry revealed the expression of glial fibrillary acidic protein (marker of astrocytes) lower in 2VO than in sham-operated rats, rhG-CSF treatment promoted astrocyte proliferation in 2VO rats. Impaired 2VO-induced cognition could be reversed by rhG-CSF treatment, and the neuroprotective effect may be by promoting hippocampal astrocyte proliferation and preventing apoptosis in the CA1 region in rats.
机译:重组人粒细胞集落刺激因子(rhG-CSF)是人体内自然产生的造血生长因子,具有多种神经保护活性。然而,rhG-CSF对慢性脑缺血大鼠星形胶质细胞增殖和神经凋亡的影响尚不清楚。我们研究了rhG-CSF对双侧颈总动脉结扎(2-血管闭塞,2VO)大鼠认知功能,星形胶质细胞增殖和神经细胞凋亡的影响。莫里斯水迷宫的结果表明,rhG-CSF处理缩短了逃逸潜伏期。对于探针试验,盐水处理的2VO大鼠的空间记忆明显低于假手术和rhG-CSF处理的2VO大鼠。组织学显示,在2VO中,CA1区锥体细胞的数量要少于假手术大鼠,rhG-CSF的使用可以防止慢性脑缺血引起的神经丢失。免疫组织化学显示,2VO大鼠胶质纤维酸性蛋白(星形胶质细胞的标志物)的表达低于假手术组,rhG-CSF处理促进了2VO大鼠星形胶质细胞的增殖。 rhG-CSF处理可逆转2VO诱导的认知障碍,神经保护作用可能是通过促进大鼠海马星形胶质细胞增殖并防止其CA1区凋亡。

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