補(bǔ)體C5a對腎移植排斥反應(yīng)中IL-17產(chǎn)生的調(diào)節(jié)作用
[Abstract]:In recent years, there are about 2 million new cases of renal failure due to various causes, although kidney transplantation is an ideal method for the treatment of end-stage renal failure, and the long-term maintenance of the function of the transplanted kidney is an important problem to be solved. At present, at home and abroad, the clinical application of the immunosuppressants such as ciclosporin A, tamosmin and rapamycin as a drug for inhibiting the rejection after renal transplantation The mechanism of action of these anti-rejection drugs is to control the generation of rejection by non-specific inhibition of the activation and proliferation of T-cells. has a clear effect on all T cell functions, a lack of selectivity, side effects, Large. IL-17 is secreted by various cells such as CD4 + T subpopulations, CD8 + T subpopulations, cells and neutrophils. It is an important pro-inflammatory factor that can induce human epidermal cells, endothelial cells and fibroblasts to secrete IL-6, IL-8 and G-CSF, promote the expression of ICAM-1 in human fibroblasts, and raise neutrophils and promote blood. The results suggest that IL-17 has an important role in the acute rejection of organ transplantation. To act. In the graft rejection, the combination of the graft antigen and the antibody is further induced The active complement system. As the hub molecule of the complement system, C5 is activated, and can be cleaved to form C5a and C5b. C5a is an important inflammatory mediator and a chemokine that will play its role by binding to the target cell surface C5aR. Biological effects. Although the important role of complement in transplant rejection has been reported, the role of small molecule C5a in clinical transplant rejection the system does not Objective: To study the expression of interleukin-17 and complement C5 activation product C5a in the development of renal transplant rejection. possible Methods: The peripheral blood cells of the patients before and after renal transplantation were compared by flow cytometry (FCM) and flow cytometry (FCM). The percentage of IL-17 + T cells was determined by enzyme-linked immunosorbent assay (ELISA). The level of serum complement C5a in the patients before and after the operation. and the deposition of the complement activation product C5b-9. Expression of C5aR in small-tube epithelial cell line HK2 cells. Human renal tubular cells were compared with the recombinant human C5a before and after C5a induction by immunohistochemistry and flow cytometry. epithelioma The results showed that the percentage of IL-17 + T cells in peripheral blood of patients before and after kidney transplantation was detected by flow cytometry. The percentage of IL-17 + T cells increased significantly in 3 days after the operation. The results of the ELISA showed that the IL-17 + T cells received the same allogenic group. The level of C5a of the patient was significantly higher than that of the normal renal tissue at 7 days after renal transplantation. The expression of IL-17 in the renal tissue of the rejection reaction and the deposition of the complement activation product C5b-9 were compared with the normal renal tissue. The product is obviously increased, and the expression of the two is similar, and is mainly concentrated in the renal tubular region. The results of the cytochemistry showed that the expression of IL-17 was up-regulated after the HK2 cells were stimulated by C5a in the human renal tubular epithelial cell line HK2. The expression of IL-17 was up-regulated after the HK2 cells were stimulated by the recombinant human C5a. supracellular Conclusion: The C5a of the complement C5 can be combined with the C5aR on the renal tubular epithelial cells by the combination of the C5aR and directly on the renal tubular epithelial cells. Conclusion: The C5a of the complement C5 can be combined with the C5aR on the renal tubular epithelial cells. To regulate the production of IL-17 in renal tubular epithelial cells and to promote the occurrence of allograft rejection, the results of this study can be complement inhibition.
【學(xué)位授予單位】:第三軍醫(yī)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:R699.2
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