OBJECTIVE
To identify informative predictors of the development and progression of multiple sclerosis (MS) based on polygenic analysis of associations of polymorphic variants in the IL1R1, IL10, IL12B, IL2, IL2RA, and IL7R genes.
MATERIAL AND METHODS
The study included 247 patients with MS and 1271 control subjects. Associations of development and progression of MS with polymorphic variants of the IL1R1, IL10, IL12B, IL2, IL2RA, IL7, and IL7R genes were analyzed. The combinations of allelic variants associated with the disease were searched using the APSampler software, and predictive models of the development and progression of MS were developed using multifactorial logistic regression with step-by-step inclusion of variables.
RESULTS
The increased probability of MS was associated with the IL1R1 rs2287047 (recessive model, OR=2.2, pFDR=0.022), IL7R rs1494558 polymorphic variants (log additive model, OR=1.49, pFDR=0.003), and IL2RA rs12722580 *I/D genotype (codominant model, OR=1.67, pFDR=0.03). Reduced MS risk was associated with IL10 rs1800872 (recessive model, OR=0.38, pFDR=0.044), IL7R rs10624573 (dominant model, OR=0.67, pFDR=0.022), IL7R rs6897932 variants (recessive model, OR=0.21, pFDR=0.008), and IL2RA rs12722580 * D/D genotype (codominant model, OR=0.78, pFDR=0.03). Combinations (IL7R rs1494558*T+IL7R rs6897932*T, IL1R1 rs2287047*C+IL12B rs3212227*C and IL7R rs1494558*T/C+IL12B rs3212227*A) with a synergistic effect were identified, and predictive models of MS development and progression risk with a sufficiently high prognostic value were created.
CONCLUSION
The results of the study emphasize the importance of polymorphic variants of IL7R, IL1R1, IL2RA, and IL10 in the genetic predisposition to MS. The obtained models require validation and can be supplemented with other predictors to improve accuracy; nevertheless, they demonstrate important pathogenetic patterns and directions for further study.