大鼠腦缺血再灌注后炎性因子、神經(jīng)細(xì)胞凋亡、血腦屏障變化的動(dòng)態(tài)研究
[Abstract]:Objective: to investigate the dynamic changes and significance of inflammatory cytokines, neuronal apoptosis and blood-brain barrier structure and function after cerebral ischemia-reperfusion in rats. So as to provide experimental basis for pathological stage and clinical stroke treatment of cerebral infarction model rats. Methods: 1. SD rats were randomly divided into two groups: normal control group and control group. The rats were randomly divided into two groups: normal control group and control group. The rats were randomly divided into two groups: normal control group and control group. The rats were randomly divided into two groups: normal control group and control group. The rats were randomly divided into two groups: the control group and the control group. The rats were randomly divided into two groups: the control group and the control group. The rats were randomly divided into two groups: the control group and the control group. The rats were randomly divided into two groups: normal control group and control group. The 2Serum levels of tumor necrosis factor 偽 (TNF- 偽), interleukin-1 尾 (IL-1 尾) and interleukin-6 (IL-6) in serum were determined by Elisa, and the expression of TNF- 偽, IL-1 尾 and MMP-9 in brain tissue was determined by immunohistochemistry. (4) neuronal apoptosis was detected by in situ end labeling method (TUNEL), and 5, (BBB) function of blood brain barrier was detected by Evans blue,EB-UV spectrophotometry. Results: 1.Compared with the normal control group, the serum TNF- 偽 IL-1 尾 IL-6 concentration increased significantly from 1 h to 4 h after MCAO (p < 0 05) and reached the first peak at 6 h and 12 h (p < 0 05). TNF- 偽 and IL-1 尾 reached the second peak on the 10th day (p < 0. 05) and IL-6 reached the second peak on the 4th day (p < 0. 05). 2Compared with the normal control group, the number of TNF- 偽 cells in brain tissue increased significantly at 2 h (p < 0 05) and reached the peak at 24 h (p < 0 05), then decreased rapidly to the normal level on the 4th day, and decreased gradually on the 6th day (4d-18d group, P > 0 05). The number of IL-1 尾 and IL-6 increased significantly at 0.5 h (p < 0 05), reaching the first peak at 12 h and the second peak at 6 d (p < 0 05). 3Compared with the normal control group, the expression of TUNEL positive cells began to increase significantly at 2 h (P < 0.001) and reached the peak at 24 h (P < 0.001), but maintained a higher level (P < 0.001) at 48h, then gradually decreased to the normal expression level (P0. 196) at 18 d. 4Compared with the normal control group, the expression of MMP-9 increased at 0 h (P < 0 05) and reached the peak at 48 h (P < 0.001), and decreased after 4 d. There were significant differences in the expression of MMP-9 between the lesion side and the normal side at different time points in the model group (P < 0. 01). 5Compared with the normal control group, the content of Evans blue in the focus side and the healthy side of brain tissue began to increase at 4 h after 2 hours (P < 0.001), reached the peak at 24 h (P < 0.001), and then decreased gradually. In the model group, there were significant differences in the content of EB between the focus side and the normal side at different time points (P < 0. 05). Conclusion: 12h~48h showed early ischemic and necrotic injury and apoptosis after cerebral ischemia-reperfusion. The peak of blood-brain barrier damage was glial proliferation for 10 days, and the inflammatory reaction disappeared after 14 days of injury repair. Glial scar formation, blood brain barrier reconstruction.
【學(xué)位授予單位】:南昌大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:R743.31
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