硫化氫后處理對短暫性全腦缺血模型保護(hù)作用的研究
[Abstract]:Aim: to determine the optimal post-treatment time and dose of hydrogen sulfide post-treatment in transient swarm cerebral ischemia model. To study the neuroprotective mechanism of Kv4.2 and VEGF in this model and their relationship with hydrogen sulfide. Methods: male Wistar rats were selected. The model of transient global ischemia was established by four-vessel occlusion. Choose different hydrogen sulfide after treatment time and different hydrogen sulfide after treatment dose. The number of CA1 cells in hippocampus of rats was counted by Nissl staining to determine the optimal post-processing time and dose. Western blot was used to observe the expression of Kv4.2 and VEGF in different groups. Results: (1) hydrogen sulfide post-treatment could protect hippocampal CA1 neurons after transient global cerebral ischemia (15min), (2) the protective effect was 12-48 hours after ischemia. (3) the protective dose was related to the administration time, (4) 12 hours after ischemia, the protective effects of 24umol group and 48umol group were significantly higher than that of ischemia-reperfusion group (P0.05), and the protective effect of 48umol group was more obvious than that of 24umol group (P0.05). (5) after 24 hours of ischemia, 24umol group and 48umol group had significant protective effects (P0.05), but there was no significant difference between the two groups (P0.05); (6) 48 hours after ischemia. Only 24umol group had protective effect (P0.05). (7) when 24umol/kg was treated with hydrogen sulfide, the protective effect of neuron was different in different postprocessing time, and the dose of 24umol/kg was the strongest at 24 hours after ischemia reperfusion (P0.05); (8) when 48umol/kg was treated with hydrogen sulfide, the protective effect was the strongest at 24 hours after ischemia reperfusion (P0.05). (9) there was no protective effect in 144umol group after 12 hours, 24 hours and 48 hours of reperfusion. (10) after 38 hours of ischemia, the expression of Kv4.2 was lower than that of sham-operation group (P0.05), but the expression of Kv4.2 in hydrogen sulfide group was higher than that in ischemic group (P0.05), but not higher than that in sham-operation group (P0.05). (11) the expression of VEGF in ischemic group was significantly higher than that in sham-operated group (P0.05), and that in hydrogen sulfide group was higher than that in ischemic group (P0.05). Conclusion: (1) treatment with small dose of hydrogen sulfide at 12-48 hours after transient global brain deficiency can protect neurons, and the same dose has different protective effects at different time. (2) after treatment with hydrogen sulfide, the neuroprotective effect may be achieved by inhibiting the decrease of Kv4.2 and upregulating VEGF.
【學(xué)位授予單位】:青海大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:R743.31
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