title: IL-10 promoter polymorphisms influence disease severity and course in psoriasis.
abstract: We analyzed three single-nucleotide polymorphisms (SNPs) at the interleukin-10 (IL-10) 5' flanking region (positions -1082 A/G, -819 C/T and -592 C/A) in an association case-control study involving 248 patients with plaque type of psoriasis and 148 unrelated healthy volunteers using ARMS (amplification refractory mutation system)-PCR (Polymerase Chain Reaction) method. No difference was found in the frequencies of haplotype distribution between healthy controls and patients with psoriasis. There were no significant differences in the IL-10 haplotype distribution depending on the age of onset and family history of psoriasis. However, the results of our study demonstrate that the IL-10 haplotype has a role in determining severity and course of plaque type of psoriasis. IL-10 ACC haplotype (P<0.05) is likely to be defining lower activity of disease (PASI</=20; extent</=10%) and ATA haplotype is likely to be associated with persistent eruption (P<0.01). As ACC haplotype is suggested to be associated with high IL-10 secretion and ATA is related to low IL-10 secretion, potential differences in the IL-10 secretion levels might contribute the differences in the clinical course of psoriasis.
authors.affiliation: Department of Dermatology and Venerology, University of Tartu, Tartu, Estonia.
authors.forename: K
authors.initials: K
authors.lastname: Kingo
authors.forename: S
authors.initials: S
authors.lastname: Kõks
authors.forename: H
authors.initials: H
authors.lastname: Silm
authors.forename: E
authors.initials: E
authors.lastname: Vasar
mesh_terms: D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D004198:Disease Susceptibility; D005260:Female; D005786:Gene Expression Regulation; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics*; D011565:Psoriasis / Q000235:genetics* / Q000473:pathology; D012720:Severity of Illness Index
chemical_list: D016753:Interleukin-10