MHC,LCE和IL12B基因交互作用與銀屑病的相關(guān)性研究
[Abstract]:Background Psoriasis (Psoriasis) is a common chronic recurrent inflammatory dermatosis with erythema and scales as the main clinical manifestation. The incidence of psoriasis in Han nationality is about 0. 123%. At present, the incidence of psoriasis in China is about 0. 4 million. Psoriasis vulgaris was the most commonly seen clinically, accounting for more than 90% of the patients. The exact pathogenesis of psoriasis has not been completely clarified, and it is considered to be a complex disease which is affected by many factors, such as heredity and environment. The possible genetic susceptibility genes include human leukocyte antigen (Human leukocyte antigen,HLA)-related genes and non-HLA related genes. Genome-wide association analysis (Genome wide association studies,GWAS) produced a large amount of data. It is important to further study the interaction between gene and gene (Gene interaction), especially the interaction between MHC and other genes, on the pathogenesis of psoriasis. Objective to investigate the correlation between MHC region and psoriasis, to analyze the effect of MHC,LCE / IL12B gene interaction on psoriasis, and to estimate the combined effect of MHC and LCE,MHC and IL12B. Methods the genotyping of SNP rs1265181 (in MHC region) in 5 067 psoriasis cases and 6 404 controls was performed to verify the correlation between MHC and psoriasis. Then the best correlation model of MHC,LCE and IL12B mutation was estimated by combining the validation data with previous GWAS data. Then the gene interaction between MHC,LCE and IL12B was analyzed by logistic regression method, and the combined effect of MHC and LCE,MHC and IL12B was estimated according to the best correlation model of variation. Finally, according to the combined effect, we compared the clinical characteristics of patients with psoriasis and psoriasis without risk variation. Results the results of association analysis of 1MHC_rs1265181 in 5067 cases and 6404 controls were P combined 1E-300, OR = 16.52, suggesting strong association between MHC and psoriasis. 2 combining with the previous data of GWAS study, this paper analyzes the correlation model of MHC,LCE and IL12B variation, and finds out that the best correlation model of LCE_rs4085613_A is the invisible model (Recessive model), IL12B_rs3213094_A 's best correlation model is the cumulative model (Additive model),. The best correlation model for MHC_rs1265181_G is the dominant model (Dominant model); 3 the results of gene interaction are as follows: we found that MHC, LCE,MHC and IL12B had significant gene interaction in the initial screening stage (p0. 0379 and p0. 0287, respectively), and the interaction was still significant in the validation stage (MHC and LCE,p=0.0091;). MHC and IL12B,p=0.046), the gene interaction is more significant in the combined samples (MHC and LCE,p=0.0016;MHC and IL12B,p=0.0036). 4 We estimate the gene association effect according to the correlation model of each variation. We found that individuals with both MHC and LCE risk genotypes were 26 times more at risk than those with both protective genotypes. Individuals with both MHC and IL12B risk genotypes were 36 times more at risk than those with protective genotypes. 05 according to the combined effects of the two SNP, We found significant differences in clinical characteristics between psoriatic patients with and without risk mutations. Conclusion this study further verifies the correlation between MHC region and psoriasis, and finds that MHC and LCE,MHC have significant gene interaction with IL12B. It also suggests that MHC is the main gene of psoriasis. The study also found that patients with MHC,LCE and IL12B risk mutations had different clinical phenotypes from those with no risk mutations.
【學(xué)位授予單位】:安徽醫(yī)科大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2010
【分類號】:R758.63
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