rs1554606

This genome-wide association study (GWAS) identified genetic variants influencing interleukin levels in African Americans. IL-10 levels showed genome-wide significant associations with 8 SNPs, most notably rs5743185 in PMS1 (p=2.30×10⁻¹⁰), with successful replication of rs17365948 in YWHAZ. IL-1Ra levels showed suggestive associations with SNPs in ASB3 and the IL-1 gene family, with replication of rs4251961. IL-6 levels showed genome-wide significant association with one variant near RP11-314E23.1 (p=8.63×10⁻⁹).

Fine-mapping study of C-reactive protein (CRP) regulation in 594 African Americans using dense SNP genotyping and Bayesian model selection. Found rs3091244(T) allele as the key functional variant regulating CRP expression with additive effects (Bayes factor >100), explaining 5.20% of CRP variance with β=0.312 (95% CI 0.146-0.491). Secondary analysis supported a two-SNP model including rs12728740, which segregated with European-origin haplotypes. The study demonstrates that weaker linkage disequilibrium in African Americans resolved genetic ambiguity seen in European populations.