Analysis of the frequency of single nucleotide polymorphisms in cytokine genes in patients with New Onset Diabetes After Transplant

New Onset Diabetes After Transplantation (NODAT) is a serious metabolic complication. While beta -cell dysfunction is considered the main contributing factor in the development of NODAT, the precise pathogenesis is not well understood. Cytokines are thought to be involved in the inflammation of islet beta -cells in diabetes; however, few studies have investigated this hypothesis in NODAT. A total of 309 kidney transplant recipients (KTRs) were included in this study. An association between kidney transplants, and the development of diabetes after transplant (NODAT) was investigated. Comparison was made between KTRs who develop diabetes (NODAT cases) or did not develop diabetes (control), using key cytokines, IL-6 G (- 174)C, macrophage mediator; IL-4 C (- 490)T, T helper (Th)-2 cytokine profile initiator; Th-1 cytokine profile initiator interferon-gamma T (+874) A gene and TGF beta 1 C (+869) T gene polymorphisms were investigated. The genes were amplified using well-established polymerase chain reaction (PCR) techniques in our laboratory. Compared to the AA and AT genotypes of interferon gamma (IFNG), there was a strong association between the TT genotype of IFNG and NODAT kidney transplant recipients (KTRs) versus non-NODAT KTRs (p=0.005). The AA genotype of IFNG was found to be predominant in the control group (p=0.004). Also, significant variations of IL6 G (- 174) C, IL-4 C (- 590) T, interferon-gamma T (+874) A gene and transforming growth factor beta 1 C (+869) T may contribute to NODAT. Our data is consistent with theTh-1/T-reg pathway of immunity. Further larger pan Arab studies are required to confirm our findings.

Automated summary

New Onset Diabetes After Transplantation (NODAT) is a serious metabolic complication post kidney transplant, and studies have found an association between gene polymorphisms like interferon gamma and NODAT.