title: Interleukin-10 gene promoter polymorphism in Polish rheumatoid arthritis patients.
abstract: Interleukin (IL)-10 is an important multifunctional cytokine with both anti-inflammatory and immunoregulatory effects in rheumatoid arthritis (RA). In the present study, we evaluated the frequency and potential impact of IL-10 promoter polymorphisms on susceptibility to and severity of RA in Polish in - patients with a high disease activity (mean DAS 28 C-reactive protein 5.25). DNA was obtained from 244 RA patients and 106 healthy controls. The -592C/A and -1082G/A IL-10 gene polymorphisms were amplified by polymerase chain reaction with restriction endonuclease mapping. The frequency of the IL-10-592CA, -592AA genotypes (respectively: 30% vs 5% and 7% vs 0%) and allele -592A (37% vs 5%) were significantly higher in RA patients as compared with a control group. We did not find any association of the IL-10-592C/A genotype distribution with disease parameters, except for an increased ESR (erythrocyte sedimentation rate) in patients with the -592CC genotype as compared with those with -592CA or -592AA genotypes (P = 0.01). The frequency of the IL-10-1082GG genotype was lower (P = 0.0001), and that of the IL-10-1082GA genotype was higher (P = 0.009) in RA patients comparing with the control group. In RA patients with -1082GA or -1082AA genotypes the time duration of the disease (P = 0.03), Health Assessment Questionnaire (HAQ) Score (P = 0.04) and PLT count (P = 0.001) were significantly increased as compared with subjects with -1082GG genotype. Presented findings indicate that IL-10-592C/A and IL-10-1082G/A polymorphisms may be considered genetic risk factors for RA susceptibility and severity.
authors.affiliation: Department of Biochemistry, Institute of Rheumatology in Warsaw, Warsaw, Poland. paradowska_aga@interia.pl
authors.forename: A
authors.initials: A
authors.lastname: Paradowska-Gorycka
authors.forename: J
authors.initials: J
authors.lastname: Trefler
authors.forename: J
authors.initials: J
authors.lastname: Maciejewska-Stelmach
authors.forename: J K
authors.initials: JK
authors.lastname: Łacki
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011044:Poland / Q000453:epidemiology; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012307:Risk Factors; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires
chemical_list: C508609:IL10 protein, human; D016753:Interleukin-10