title: Association of IL-1 gene complex members with ankylosing spondylitis in Chinese Han population.
abstract: There are reports of IL-1 complex gene polymorphisms in ankylosing spondylitis (AS; MIM 106300), but the results have been inconsistent among populations. Moreover, few studies examine the association between IL-1 complex gene polymorphisms and clinical symptoms of AS patients. We investigated polymorphisms of IL-1 complex with AS in the Chinese Han population in this study. Chinese Han AS patients and ethnically matched healthy controls were genotyped for five single nucleotide polymorphisms (IL1beta+3953, beta-511, F10.3, RN.4, RN.6/1) and the IL1RN.VNTR of IL-1 gene cluster. Allele, Genotype and haplotype frequencies were compared between cases and controls by SHEsis software. The frequency of allele C of the marker IL1F10.3 was significantly increased in AS patients versus controls [p = 0.001, odds ratio (OR) = 1.54, 95% confidence interval (CI) = 1.19-1.20; p = 0.002, respectively]. Strong linkage disequilibrium was identified between IL1B-511, IL1B+3953 and RN4 in both patients and healthy controls (D' > 0.95). Haplotypes of pairs of these markers (6) were also significantly associated with AS. The strongest associations observed was between allele combination B-511-T/B+3953-C/F10.3-C/RN4-T/RN2VNTR-1/RN6.1-C and AS (p = 3.32 x 10(-5), OR = 4.41, 95% CI=2.1-9.3). Clinical manifestation showed week association between RN2VNTR A2 allele and risk of peripheral arthritis (OR = 0.2, 95% CI = 0.07-0.91). The IL-1 gene cluster is associated with AS in Chinese population. This finding provides strong statistical support for the previously observed relationship and indicates possible association between clinical manifestation and genetic factor.
authors.affiliation: Department of Rheumatology, Third affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
authors.forename: Z S
authors.initials: ZS
authors.lastname: Guo
authors.forename: C
authors.initials: C
authors.lastname: Li
authors.forename: Z M
authors.initials: ZM
authors.lastname: Lin
authors.forename: J X
authors.initials: JX
authors.lastname: Huang
authors.forename: Q J
authors.initials: QJ
authors.lastname: Wei
authors.forename: X W
authors.initials: XW
authors.lastname: Wang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Xie
authors.forename: Z T
authors.initials: ZT
authors.lastname: Liao
authors.forename: S Y
authors.initials: SY
authors.lastname: Chao
authors.forename: J R
authors.initials: JR
authors.lastname: Gu
mesh_terms: D000293:Adolescent; D000328:Adult; D044466:Asian People / Q000235:genetics*; D016022:Case-Control Studies; D005006:Ethnicity / Q000235:genetics*; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D020022:Genetic Predisposition to Disease; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D007375:Interleukin-1 / Q000235:genetics*; D015810:Linkage Disequilibrium / Q000235:genetics; D008297:Male; D008875:Middle Aged; D005810:Multigene Family / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D013167:Spondylitis, Ankylosing / Q000235:genetics*; D055815:Young Adult
chemical_list: D007375:Interleukin-1