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The combined effect of interleukin (IL)-10 and IL-12 polymorphisms on induced cytokine production
Authors:Miteva Lyuba  Stanilova Spaska
Affiliation:Department of Molecular Biology, Immunology, & Medical Genetics; Faculty of Medicine, Trakia University, Stara Zagora; Bulgaria.
Abstract:
Interleukin (IL)-12 and IL-10 are immunoregulatory cytokines with an antagonistic effect of the T-helper (Th)1/Th2 cytokine balance and provide a functional link between innate and adaptive immune responses. The aim of the study was to investigate the combined effect of -1082A*G in IL10 and +16974A*C in IL12B single nucleotide polymorphisms (SNPs) on induced cytokine production by stimulated peripheral blood mononuclear cells (PBMCs) isolated from healthy donors. The presence of the high-producer IL-12p40 genotype led to diminished production of IL-10 as determined by the -1082*G allele of SNP in IL10. Significantly decreased IL-10 production was detected in AA+AG/GG in comparison with the low-producer IL-12p40 (AC/CC+AG/GG) genotype combination after stimulation with C3bgp (2 +/- 4 vs. 29 +/- 14.2 pg/ml; p = 0.0003) and LPS (33.4 +/- 13.5 vs. 93.3 +/- 59.6 pg/ml; p = 0.019). IL-12p40 production was independent of IL10 genotype. The present results demonstrated that the production of IL-10 from PBMC depended on both -1082A*G in IL10 and +16974A*C in IL12B polymorphisms.
Keywords:  1082A*G IL-10 polymorphism   +16974A*C IL-12B polymorphism   Combined effect   IL-12p40 production   IL-10 production
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