新型基因组分析方法发现银屑病新的易感基因LCE

银屑病是皮肤病领域最为常见的重大疾病之一,以慢性炎症性皮损为特征,好发于青壮年,国内约有400万患者。银屑病缺乏有效的治疗手段,患者生存质量极差。该病的发病机制目前尚不清楚,多认为是一种常见的复杂疾病(多基因病)。本研究采用两阶段病例-对照研究,首次应用全基因组关联分析(GWAS)方法确定了中国人群银屑病的易感基因变异体。第一阶段,利用Illumina610芯片,对1139例中国汉族人银屑病患者和1132例正常对照进行了GWAS研究。第二阶段,选出目的SNPs位点分别在两个独立样本人群中进行验证,汉族人群包括5182例病例和6516例对照人群;维吾尔族人群包括539例病例和824例对照。本研究发现了一个新的位于染色体1q21的易感基因位点LCE(rs4085613,Pcombined=6.69×10-30,OR=0.76),同时验证了已知的两个易感位点——MHC(rs1265181,P=1.93×10-208,OR=22.62)和IL12B(rs3213094,Pcombined=2.58×10-26,OR=0.78)。本研究将对阐明银屑病的遗传学发病机制、发现易感人群、早期预防及进行有效的治疗具有重大意义。

Psoriasis Genome-Wide Association Study Identifies Novel Susceptibility Gene LCE

Psoriasis is one of the commonest skin disease characterized by the chronic and inflammatory skin lesion,mainly affecting young people and about 4 million of Chinese population. There lacks of effective therapy for psoriasis,leading to a very bad life quality of the patients. The pathogenesis of psoriasis is still unclear and many people tend to think it as a common (polygenic) disease. Hence,the identification of psoriasis susceptibility gene by molecular genetics should be of great of importance for the s...