IL-22對角質(zhì)形成細胞表達HB-EGF及TIG3作用機制的研究
[Abstract]:Psoriasis is a common chronic recurrence of erythema and scaly disease. This disease can be divided into 4 types: common type, arthropathy, erythroderma type and pustular type. The pathogenesis is chronic and recurrent. The pathogenesis of this disease is not completely clear. At present, the pathogenesis of psoriasis is mainly attributed to auxiliary Th cells and related cell causes. An inflammatory response.Th22 cell targeting keratinocyte as a target is a newly discovered CD4+ auxiliary T cell subgroup, highly expressed in the peripheral blood of psoriasis, and its main cytokine is IL-22. through which the related biological functions are realized. In the peripheral blood and skin lesions of psoriasis patients, the IL-22 level and the severity of psoriasis are obvious. Our previous study shows that heparin binding to epidermal growth factor like growth factor (heparin-binding epidermal-growth-factor-like growth factor, HB-EGF) plays an important role in the abnormal proliferation and prognosis of epidermal KC in psoriasis. Previous studies in this study show that IL-22 can induce Ha Ca T cell expression in vitro. EGF, but the mechanism of action is not clear, the mitogen activated protein kinase (MAPK-ERK1/2) pathway and the transcription activating factor pathway (JAK/STAT) are the two signaling pathways that play an indispensable role in the pathogenesis of psoriasis. The gene 3 (Tazarotene-induced gene 3, TIG3) is a tumor suppressor,.TIG3, which regulates the keratinocyte The proliferation and differentiation of psoriasis and the decrease of expression in psoriasis. In summary, we speculate that IL-22 promoting KC secretion may be related to the two signaling pathways of MAPK-ERK1/2 and JAK/STAT, and that there is a certain relationship between TIG3 expression and.IL-22 by promoting HB-EGF expression and inhibiting the TIG3 expression to participate in the occurrence and development of silver chip disease. This experiment studies IL-22 promoting HaCaT thin. The mechanism of cell secretion of HB-EGF and its effect on the secretion of TIG3 by HaCaT cells. Objective: To study the mechanism of the action of interleukin 22 (Interleukin-22, IL-22) on the expression of HB-EGF in keratinocytes and the mechanism of its effect on the expression of TIG3. Methods: 1, IL-22 and 24 hours are used at different concentrations (12.5 mu g/L, 25 u g/L, 50 mu g/L, 100 mu g/L). After that, the total protein of cell was extracted and the effects of IL-22 on the two signal pathways of MAPK-ERK1/2 and JAK/STAT were detected by Western blot, and the total protein and total m were extracted after the action of PD98059 and AG490 and IL-22 on Ha Ca T cells. The effect of transcriptional polymerase chain reaction (RT-PCR) on the secretion of HB-EGF in Ha Ca T cells was detected. SPSS 17 statistical software was used for statistical processing. P0.05 found a significant difference in.2. Imiquimod induced psoriasis like skin lesions in the skin of mice on the back, and then subcutaneous injection of 1 UU IL-22,48h to kill the mice and take the lower back. Skin, HE staining was used to observe the changes in the skin of mice. The expression of HB-EGF was observed by immunohistochemical staining,.3, with the different concentrations (12.5 g/L, 25 g/L, 50, g/L, 100 g/L) IL-22 and the application related signaling pathway blockers, PD98059 and AG490 and IL-22. Location, the total protein and total m RNA were extracted, and the effect of Western blot, ELISA and real-time fluorescent quantitative RT-PCR on the secretion of TIG3 was detected by Ha Ca T cell. The SPSS 17 statistical package was used for statistical processing. The increase of K1/2 protein and the increase of P-JAK2 and P-STAT3 protein in the JAK2/STAT3 signaling pathway. The expression of HB-EGF protein and m RNA after adding signal pathway specific inhibitor PD98059 and AG4 90 is significantly lower than that in IL-22 intervention group. Imiquimod continues to act on the back of Bal mice, and can induce psoriasis like skin lesions in mice. The expression of HB-EGF in the skin epidermis of normal Bal B/c mice and psoriasis mice increased by.3. IL-22 could cause the decrease of TIG3 protein level in Ha Ca T cells. The intensity and concentration of its action were related to the concentration of TIG3 in the cells of different concentrations of IL-22 treatment group than that of the control group. The inhibitory effect of expression was gradually enhanced. The inhibitory effect of PD98059 and IL-22 on TIG3 decreased compared with the IL-22 group. The difference was statistically significant. Conclusion: IL-22 can cause MAPK-ERK1/2 and JAK2/STAT3 in Ha Ca T cells to induce two signaling pathways to induce the effect of.IL-22 cells. The mechanism may be related to the two signaling pathways of MAPK-ERK1/2 and JAK2/STAT3 that.IL-22 can cause the HB-EGF expression in the normal skin of Bal B/c mice and the HB-EGF expression in the epidermis of psoriasis like skin lesions. The.IL-22 can inhibit TIG3 expression in Ha Ca T cells. The inhibitory effect is related to the IL-22 concentration. The mechanism of action may be associated with the letter and the letter The number path is related.
【學位授予單位】:天津醫(yī)科大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:R758.63
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