title: Comparison of single nucleotide polymorphisms in the human interleukin-10 gene promoter between rheumatoid arthritis patients and normal subjects in Malaysia.
abstract: In this study, three single nucleotide polymorphisms (SNPs) located within the promoter of the human interleukin (IL)-10 gene [rs1800896 (position: -1087G>A), rs1800871 (position: -824C>T) and rs1800872 (position: -597C>A)] were investigated in 84 rheumatoid arthritis (RA) patients and 95 age- and sex-matched healthy subjects using polymerase chain reaction-restriction fragment length polymorphism method. Production of IL-10 by peripheral blood lymphocytes from the RA patients and healthy subjects cultured in the presence of Concanavalin A (Con A) was determined by using enzyme-linked immunosorbent assay. The results show that the distribution of the IL-10 genotypes did not differ significantly between RA patients and healthy subjects (P>0.05). However, a significant difference was observed in allele frequencies of -824CT, -824TT, -597CA, and -597AA between the RA patients and healthy volunteers (P=0.04). The -1087A/-824T/-597A (ATA) haplotype, which comprises all mutant alleles, was associated with lower IL-10 production when compared with the other haplotypes. In contrast, the RA patients who did not display the ATA haplotype produced significantly higher levels of IL-10 when compared with those carrying either one (P=0.012) or two (P=0.005) ATA haplotypes. Our findings suggest that there is an association between SNPs in the promoter of the human IL-10 gene and susceptibility to RA.
authors.affiliation: International Medical University, No. 126, Jalan 19/155B, Bukit Jalil, 57000, Kuala Lumpur, and Department of Medicine, Hospital Tuanku Ja'afar, Seremban, Malaysia. cs_hee@yahoo.com
authors.forename: Chee Seng
authors.initials: CS
authors.lastname: Hee
authors.forename: Suk Chyn
authors.initials: SC
authors.lastname: Gun
authors.forename: Rakesh
authors.initials: R
authors.lastname: Naidu
authors.forename: Esha
authors.initials: E
authors.lastname: Gupta
authors.forename: Sushela Devi
authors.initials: SD
authors.lastname: Somnath
authors.forename: Ammu Kutty
authors.initials: AK
authors.lastname: Radhakrishnan
mesh_terms: D000483:Alleles; D001172:Arthritis, Rheumatoid / Q000175:diagnosis* / Q000235:genetics*; D016022:Case-Control Studies; D003208:Concanavalin A / Q000494:pharmacology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D008296:Malaysia; D008297:Male; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic; D017422:Sequence Analysis, DNA
chemical_list: D003208:Concanavalin A; D016753:Interleukin-10