title: Interleukin-10 microsatellite variants and the risk of acute coronary syndrome among Tunisians.
abstract: The objective of the study was to investigate the association of interleukin (IL)-10 promoter microsatellite polymorphisms, linked with altered IL-10 secretion, with the susceptibility to acute coronary syndrome (ACS) in adult Tunisian patients. We genotyped 291 ACS patients and 291 age-, gender- and ethnically matched control subjects for the microsatellites IL-10R [X78437.2g.5325CA(11_15)] and IL-10G [X78437.2g.8134CA(14_29)] by PCR-based assays. Haplotypes were reconstructed using maximum likelihood method. Regression analysis was used in determining the risk imparted by specific IL-10 genotypes and haplotypes. A significant decrease in IL-10G12 (24 CA repeats) (P<0.001; OR=0.465) and IL-10G15 (27 CA repeats) (P=0.043; OR=0.232), and a significant increase in the low IL-10 producer allele, IL-10R3 (14 CA repeats) (P=0.049; OR=1.461), microsatellites were seen in the ACS group compared with controls. Of the possible 14 haplotypes constructed, there was an enrichment of the R2G9 (13CA vs. 21CA) haplotype in controls [P=0.019; adjusted OR (95% CI)=0.67 (0.48-0.94)] and R2G15 (13CA vs. 27CA) haplotype in cases [P=0.042; adjusted OR (95% CI)=5.29 (1.06-26.30)], thus assigning a protective and susceptible nature to these haplotypes respectively. The differential association of IL-10 microsatellite alleles and haplotypes with ACS suggests that IL-10 contributes to ACS pathogenesis. While the functional attributes of these microsatellite markers remain to be seen, it is likely that they have distinct functional properties (altered IL-10 secretion), which in turn affect the susceptibility to ACS development.
authors.affiliation: Faculté de Pharmacie, Unité de Recherche des Maladies Hématologiques et Auto-Immunes, Monastir, Tunisia.
authors.forename: S
authors.initials: S
authors.lastname: Ben-Hadj-Khalifa-Kechiche
authors.forename: P
authors.initials: P
authors.lastname: Cornillet-Lefebvre
authors.forename: L
authors.initials: L
authors.lastname: Gillot
authors.forename: N
authors.initials: N
authors.lastname: Abboud
authors.forename: A
authors.initials: A
authors.lastname: Ben-Khalfallah
authors.forename: F
authors.initials: F
authors.lastname: Addad
authors.forename: W Y
authors.initials: WY
authors.lastname: Almawi
authors.forename: T
authors.initials: T
authors.lastname: Mahjoub
mesh_terms: D054058:Acute Coronary Syndrome / Q000235:genetics*; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics*; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D014416:Tunisia
chemical_list: D016753:Interleukin-10