人类白细胞抗原DQ基因多态性与三氯乙烯药疹样皮炎易感性的关系

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目的研究人类白细胞抗原DQ(HLADQ)基因多态性与三氯乙烯药疹样皮炎易感性的关系。方法应用聚合酶链反应产物直接测序方法,比较112例三氯乙烯药疹样皮炎病例和142例健康三氯乙烯接触工人HLADQA1和HLADQB1基因第2外显子氨基酸密码子多态性及等位基因型频率分布。结果病例组DQA1等位基因0201和060101/0602的分布频率[7.6%(17/224)和16.1%(36/224)]显著高于对照组[3.5%(10/284)和7.0%(20/284)],而病例组DQA1等位基因0103和050101/0503/0505的分布频率[5.8%(13/224)和8.9%(20/224)]显著低于对照组[10.9%(31/284)和17.3%(49/284)]。此外,病例组与对照组之间差异有统计学意义的氨基酸密码子多态性位点见于DQA1的5个密码子(25、41、52、54和69)。病例组与对照组HLA-DQB1等位基因的分布频率差异无统计学意义。结论HLADQA1基因多态性可能是导致三氯乙烯药疹样皮炎个体易感性差异的原因之一。
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