抗Nogo-A抗體對急性腦梗死神經(jīng)軸突再生影響的研究
[Abstract]:Aim: to investigate the therapeutic effect of anti-Nogo-A antibody on cerebral infarction after experimental middle cerebral artery occlusion (MCAO) in rats, and to observe the changes of Nogo-A protein expression after cerebral infarction. Methods: 180 SD rats were randomly divided into sham operation group, IgG group, mNGF group and Nogo-A antibody group with 45 rats in each group. The rat model of MCAO was established by thread thrombus method, and the lateral ventricle catheterization (8ul/ times, once / the same) was used to treat the rats. The first two groups were treated with IgG, and the mNGF group was treated with nerve growth factor (mNGF). Nogo-A antibody group was treated with anti-Nogo-A antibody. Each group was divided into three subgroups (15 rats in each subgroup), survived for 1 day, 3 days and 7 days respectively, and scored the neurological function at each time point, and then decapitated the brain. The relative volume of cerebral infarction, Nogo-A,GAP-43,NF200 protein immunofluorescence, Nogo-A,GAP-43,NF200 protein immunoblotting and Nogo-A mRNA,GAP-43mRNA,NF200mRNA real-time fluorescence quantitative PCR were measured respectively. Results: the neurological function scores of the false operation group were normal at each time point, and there was no significant difference in the neurological function scores of the other three groups at 3 days after treatment (P 0.05), but there was no significant difference in the neurological function scores of the other three groups at 3 days after treatment (P 0.05), but in the mNGF group, After 7 days of treatment, the neurological function scores of Nogo-A antibody group were significantly lower than those of IgG group (p0.05), especially in Nogo-A antibody group. There was no cerebral infarction in the pseudo-operation group, but there was no significant difference in the relative volume of cerebral infarction in the other three groups at each time point after treatment (P 0.05). At 1 d, 3 d and 7 d, Nogo-A,NF-200, in the pseudo-operation group was not significantly different from that in the other three groups at each time point after treatment. There was no significant difference in the expression of GAP-43 protein (p0.05). There was no significant difference in the expression of Nogo-A,NF-200,GAP-43 protein between IgG group, mNGF group and Nogo-A antibody group at 1 d and 3 d (p0.05). At 7 d, the expression of Nogo-A protein in Nogo-A antibody group was significantly lower than that in IgG,mNGF group (p0.05), while the expression of NF-200,GAP-43 protein in Nogo-A antibody group and mNGF group was significantly higher than that in IgG group (p0.05). However, there was no significant difference in the expression of NF-200,GAP-43 protein between Nogo-A antibody group and mNGF group (p0.05). There was no significant difference in Nogo-A,NF-200,GAP-43mRNA expression in sham operation group at 1 d, 3 d and 7 d (p0.05). At 1 d, there was no significant difference in the expression of Nogo-A mRNA between IgG group, mNGF group and Nogo-A antibody group (p0.05). At 3 d and 7 d, the expression of Nogo-A protein in Nogo-A antibody group was significantly lower than that in IgG, mNGF group (p0.05), while the expression of NF-200,GAP-43mRNA in Nogo-A antibody group and mNGF group was significantly higher than that in IgG group (p0.05). However, there was no significant difference in the expression of NF-200,GAP-43 protein between Nogo-A antibody group and mNGF group (p0.05). Conclusion: anti-Nogo-A antibody can improve the function of nerve defect by promoting axonal regeneration and does not reduce the volume of cerebral infarction at the same time. Because the expression of Nogo-A protein is still high on the 7th day after cerebral infarction, anti-Nogo-A protein antibody therapy should last for at least 7 days.
【學(xué)位授予單位】:貴陽中醫(yī)學(xué)院
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:R743.33
【共引文獻(xiàn)】
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