SETD2 deficiency impairs β-catenin destruction complex to facilitate renal cell carcinoma formation

Abstract

Clear cell renal cell carcinoma (ccRCC) is a largely incurable disease that is highly relevant to epigenetic regulation including histone modification and DNA methylation. SET domain-containing 2 (SETD2) is a predominant histone methyltransferase catalyzing the trimethylation of histone H3 Lysine 36 (H3K36me3) and its mutations are highly relevant to clear cell renal cell carcinoma (ccRCC). However, its physiology role in ccRCC remains largely unexplored. Here we report that Setd2 deletion impairs the {beta}-catenin destruction complex to facilitate ccRCC formation in a c-MYC-generated polycystic kidney disease (PKD) model, which can be relieved by an inhibitor of {beta}-catenin-responsive transcription. Clinically, SETD2 loss is widely observed in ccRCC samples, and negatively correlated with expression of some members of {beta}-catenin destruction complex, but positively correlated with the activation of Wnt/{beta}-catenin signaling. Our findings thus highlight a previously unrecognized role of SETD2-mediated H3K36me3 modification in regulation of Wnt/{beta}-catenin pathway in ccRCC. SummaryOur findings for the first time reveal a previously unrecognized role of the SETD2-mediated H3K36me3 modification in regulation of the Wnt/{beta}-catenin pathway in ccRCC and shed light on the molecular mechanisms underlying the formation of renal cell carcinoma with epigenetic disorders.