Polymorphisms in STAT4 increase the risk of acute renal allograft rejection in the Chinese population.

Recently, the signal transducer and activator of transcription 4 (STAT4) gene have been associated with multiple autoimmune diseases. Taking into consideration that the different autoimmune diseases may share some common pathogenetic pathways, the aim of the present study was to evaluate the role of STAT4 rs7574865 polymorphism on acute allograft rejection. The present case-control study included 453 renal allograft recipients and 378 sex matched healthy controls. Genotyping was performed using a PCR based discrimination assay for the rs7574865 STAT4 SNP. No evidence of association was found between health controls and renal transplant recipients for the G/T or T/T genotype and wild type G/G. (p=0.431, two-tailed χ(2); OR=0.894, 95% CI=0.677-1.181). But among the transplant recipients, the G/T or T/T genotype was more common in transplant rejectors (acute allograft rejection) than nonrejectors who had mostly wild-type G/G genotype (p=0.003, two-tailed χ(2); OR=0.542, 95% CI=0.361-0.815). We also found a trend that the frequency of G/T or T/T genotype was also relatively more in the acute cellular mediated rejection than antibody mediated ones (p=0.049, two-tailed χ(2); OR=0.466, 95% CI=0.216-1.003). Thus, our data suggest that the rs7574865 STAT4 SNP is a genetic susceptibility variant for acute renal allograft rejection in the Chinese population.