A functional promoter polymorphism in NFKB1 increases susceptibility to endometriosis.
Numerous proinflammatory cytokines, such as TNFalpha and IL-6, which are nuclear factor kappaB (NF-kappaB) target genes, have been shown to promote proliferation in endometriotic cells, and several other genes involved in promoting growth are also NF-kappaB target genes. The aim of this study was to investigate whether the functional insertion/deletion polymorphism (-94 insertion/deletion ATTG) in the promoter of nuclear factor kappaB gene (NFKB1) is associated with susceptibility to endometriosis. Polymerase chain reaction-polyacrylamide gel electrophoresis method was used to genotype the NFKB1 -94 insertion/deletion ATTG polymorphism in 206 women with endometriosis and 365 ethnicity-matched healthy control women. The genotyping method was confirmed by the DNA sequencing analysis. Genotype at the -94 insertion/deletion ATTG polymorphism in the NFKB1 promoter was in Hardy-Weinberg equilibrium in either case or control subjects. The frequency of the ATTG(2)/ATTG(2) genotype and ATTG(2) allele in the endometriosis was significantly higher than that of control subjects (59.7% vs. 37%, odds ratio = 3.069, p < 0.001 for ATTG(2)/ATTG(2) genotype; 75.2% vs. 59.7%, odds ratio = 2.049, p < 0.001 for ATTG(2) allele), indicating that the -94 insertion/deletion ATTG polymorphism in the NFKB1 promoter was associated with endometriosis. This study suggests that the functional -94 insertion/deletion ATTG polymorphism in the promoter of NFKB1 is associated with an increased risk for endometriosis.
Zhou
Bin
B
Laboratory of Molecular Translational Medicine, West China Second University Hospital, Sichuan University, Chengdu, P.R. China.
Rao
Li
L
Peng
Ying
Y
Wang
Yanyun
Y
Qie
Mingrong
M
Zhang
Zhu
Z
Song
Yaping
Y
Zhang
Lin
L
D000293:Adolescent; D000328:Adult; D004715:Endometriosis / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D054643:INDEL Mutation; D008875:Middle Aged; D052002:NF-kappa B p50 Subunit / Q000235:genetics*; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic; D055815:Young Adult
D052002:NF-kappa B p50 Subunit; C489548:NFKB1 protein, human