Association of angiotensinogen gene M235T polymorphism with the risk of IgA nephropathy: a meta-analysis.

The association between angiotensinogen (AGT) M235T gene polymorphism and IgA nephropathy (IgAN) risk remains elusive. Our aim was to evaluate the association between AGT M235T gene polymorphism and IgAN susceptibility by performing a meta-analysis. Eligible studies were searched according to predefined criteria using electronic databases. Eight studies were identified for the analysis of the association between AGT M235T gene polymorphism and IgAN risk. M allele/MM genotype were not associated with IgAN risk in overall populations, Caucasians and Asians (overall populations: p = 0.448 and 0.861, Caucasians: p = 0.618 and 0.886, Asians: p = 0.566 and 0.652). TT/MT genotype were not associated with IgAN risk in overall populations, Caucasians and Asians (overall populations: p = 0.703 and 0.454, Caucasians: p = 0.975 and 0.946, Asians: p = 0.697 and 0.353). No evidence of publication bias was observed. In conclusion, AGT M235T gene polymorphism may not be correlated with IgAN susceptibility in overall populations, Caucasians and Asians. However, more studies should be performed in the future.