白细胞介素-10启动子-1082和-819位点基因多态性与肠易激综合征的关系

目的 探讨白细胞介素(IL)-10启动子区基因多态性与肠易激综合征(IBS)的关系.方法 采用聚合酶链式反应结合限制性片段长度多态性分析(PCR-RFLP),对313例IBS患者及281名对照者的1L-10启动子区-1082及-819位点进行基因型分析.结果 在-1082位点与-819位点,IBS组、对照组和总人数组中,各基因型的分布符合Hardy-Weinberg平衡规律.IL-10-819位点T等位基因频率腹泻型(79.8％)和混合型(77.1％)显著高于对照组(65.7％,P＜0.05).IL-10-1082位点A、G等位基因频率在各亚型与对照组间差异无统计学意义(P＞0.05),腹泻型与混合型间差异有统计学意义(P＜0.05).IBS组-819位点T/T基因型频率(51.1％)显著高于对照组(40.2％),C/T基因型显著低于对照组,差异均有统计学意义(P值均＜0.05)；-819位点T/T基因型频率IBS的各亚型组显著高于对照组,C/T基因型IBS各亚型显著低于对照组,差异均有统计学意义(P值均＜0.05)；C/C基因型在各亚型间差异无统计学意义(P＞0.05).-1082位点基因型在IBS组和对照组间的差异无统计学意义(P＞0.05)；IBS腹泻型的-1082位点A/A基因型(93.3％)显著高于混合型IBS(82.4％),A/G基因型低于混合型IBS,差异均有统计学意义(P值均＜0.05)；但IBS其他亚型间以及与对照组间差异无统计学意义(P＞0.05).结论 IL-10启动子区域-819位点T/T基因型可能与IBS发生有关,而-1082位点可能与IBS发病无关.

The relation between interleukin-10 promoter-1082 and -819 sites gene polymorphism with irritable bowel syndrome

Objective To explore the relation between IL-10 promoter region gene polymorphism and irritable bowel syndrome (IBS).Methods By polymerase chain reaction combined with restrition fragment length polymophism (PCR-RFLP),gene type of IL-10 promoter -1082 and -819 sites in 313 IBS patients and 281 controls was analyzed.Results The distribution of IL-10-1082 and-819 allele frequencies in IBS group,control group and total was in accordance with Hardy-Weinberg equilibrium law.The frequency of IL-10-819 T allele in diarrhea subtype (79.8％) and mixed IBS subgroup (77.1％) was significantly higher than that in control group (65.7％).There were no significant differences in IL-10-1082 A/G allele frequency between each subtypes and control group (P＞0.05),however there was statistically difference between diarrhea subtype and mixed IBS subgroup (P＜0.05).The frequency of-819 T/T genotype in IBS group (51.1 ％ )was significantly higher than that of control group (40.2％),the frequency of C/T genotype was significantly lower than that of control group,and the difference was statistically significant (all P＜0.05).The IL-10-819 T/T allele frequency of all IBS subtypes was significantly higher than that of control group; however C/T allele genotype frequency of all IBS subtypes was significantly lower than that of control group,and the difference was statistically significant (all P ＜ 0.05). There was no significant difference of C/C allele genotype between subtypes (P＜0.05).There was no significant difference of -1082 allele genotype between IBS group and control group (P＞0.05).The frequency of -1082 A/A genotype in diarrhea subtype of IBS patients (93.3％) was significantly higher than that of mixed IBS subtype (82.4％),while the frequency of A/G genotype was lower than that of mixed IBS subtype,and the difference was statistically significant (all P ＜ 0.05 ); there was no significant difference between other IBS subtypes and control group (P＞0.05).Conclusion IL-10-819 promoter T/Tgenotype may be related to IBS pathogenesis.