rs28357094

This functional study examined how genetic variants in SPP1 and TGFBR2 genes modulate osteopontin expression in Duchenne muscular dystrophy (DMD) muscle tissue. The SPP1 rs28357094 promoter variant (-66 G>T) did not significantly affect OPN expression levels in DMD patients (p=0.52), but TGFBR2 rs4522809 was a strong predictor of SPP1 mRNA expression (p=0.000001), with CC genotype showing highest expression and TT showing lowest. Lower OPN expression was independently associated with later age at loss of ambulation (RR=1.2, 95% CI 1.04-1.4, p=0.03), suggesting OPN as a disease severity modifier in DMD.

This comprehensive review examines genetic associations in type I interferon-related signaling pathways across multiple autoimmune diseases. The authors review evidence linking dysregulated interferon alpha (IFNα) signaling to systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), and other autoimmune conditions, identifying multiple susceptibility genes including IFIH1, IRF5, STAT4, TYK2, BLK, BANK1, FCGR2A, and TREX1 with well-replicated associations and functional relevance to IFN pathway dysfunction.