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Fc-gamma receptor 3A polymorphism predicts the incidence of urinary tract infection in kidney-transplant recipients.

Human Immunology 2017 April
We investigated the impact of polymorphisms in host innate immunoregulatory genes on the development of infectious complications after kidney transplantation (KT). The single-nucleotide polymorphisms (SNPs) of C1QA [276 A/G], FCGR2A [131 H/R], and FCGR3A [158 F/V], genes encoding the Fc gamma receptor (FcγR), were analyzed in 81 KT recipients in relation to the occurrences of postoperative infectious complications within 30days after KT. Consistent with a lower affinity of the isoform encoded by the FCGR3A [158 F] to both IgG1 and IgG3, a significantly higher incidence of urinary tract infections (UTIs) was observed in the FCGR3A [158 F/V or F/F] individuals (65.5%) than in the FCGR3A [158 V/V] individuals (34.5%) following KT. The combination of FCGR2A and FCGR3A SNPs further stratified the incidence of UTIs, regardless of C1QA SNP following KT. No differences were observed in the incidence of fungal or cytomegalovirus infections with respect to the 3 gene polymorphisms. In conclusion, our findings indicate that FcγR SNPs are predisposing factors for UTIs after KT. This study provides a foundation for further prospective studies on a larger scale.

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