IL-1RN内含子2和外显子2基因多态性的分布特点及其与血脂的相关关系

目的 探讨武汉地区汉族健康人群白细胞介素-1受体拮抗剂基因(IL-1RN)第2号内含子中可变数串联重复序列(VNTR)多态性和第2号外显子 8006位点单核苷酸多态性(SNP)的分布特点及其与血脂的相关关系。方法 采用聚合酶链反应(PCR)和PCR-限制性片段长度多态性(RFLP)的分析方法,检测了251名武汉地区汉族健康者IL-1RN(VNTR)和IL-1RN( 8006)多态性,同时检测其血脂、IL-1和IL-1Ra水平。结果 IL-1RN(VNTR)的等位基因以Ⅰ型最为常见,其次为Ⅱ型,Ⅳ型较为罕见;IL-1RN( 8006)的等位基因以T型最为常见,其次为C型;IL-1RN(VNTR)的等位基因Ⅱ总是伴随着IL-1RN( 8006)的等位基因C而出现;这两种多态性的分布在男女间差异不显著,且与血脂、IL-1和IL-1Ra水平间不存在相关关系(P>0.05)。结论 武汉地区汉族健康人群IL-1RN内含子2和外显子2中均存在基因多态性,其等位基因间存在连锁不平衡;这两种多态性与血脂、IL-1和IL-1Ra水平间不存在相关关系。

The distribution of gene polymorphisms in the intron 2 and exon 2 of interleukin-1 receptor antagonist and their correlation with the serum lipoprotein level

OBJECTIVE: To study the distribution of variable numbers of tandem repeat (VNTR) polymorphism in the intron 2 and the single nucleotide polymorphism (SNP) at position +8006 in the exon 2 of IL-1RN in healthy Chinese Han Population of Wuhan province and to analyze their correlation with the serum lipoprotein level. METHODS: IL-1RN (VNTR) and IL-1RN (+8006) polymorphisms were detected by PCR and PCR-RFLP methods in 251 healthy Chinese Han Population of Wuhan, and the levels of serum lipoprotein, IL-1 and IL-1Ra were inspected simultaneously. RESULTS: In IL-1RN (VNTR), allele I appeared most common, then allele II, and allele IV was rare. At the position of IL-1RN (+8006), allele T was most commonly seen followed by allele C. Allele II of IL-1RN (VNTR) always existed with allele C of IL-1RN (+8006). The levels of serum lipoprotein, IL-1 and IL-1Ra were not different among the different genotypes of the two polymorphisms. CONCLUSION: There were two gene polymorphisms in the intron 2 and exon 2 of IL-1RN, which were not correlated with the levels of serum lipoprotein, IL-1 and IL-1Ra. However, there seemed to be a linkage disequilibrium between IL-1RN (VNTR) and IL-1RN (+8006).