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JRK is a positive regulator of beta-catenin transcriptional activity commonly overexpressed in colon, breast and ovarian cancer

Abstract

The loss of beta-catenin inhibitory components is a well-established mechanism of carcinogenesis but beta-catenin hyperactivity can also be enhanced through its coactivators. Here we first interrogated a highly validated genomic screen and the largest repository of cancer genomics data and identified JRK as a potential new oncogene and therapeutic target of the beta-catenin pathway. We proceeded to validate the oncogenic role of JRK in colon cancer cells and primary tumors. Consistent with a beta-catenin activator function, depletion of JRK in several cancer cell lines repressed beta-catenin transcriptional activity and reduced cell proliferation. Importantly, JRK expression was aberrantly elevated in 21% of colorectal cancers, 15% of breast and ovarian cancers and was associated with increased expression of beta-catenin target genes and increased cell proliferation. This study shows that JRK is required for beta-catenin hyperactivity regardless of the adenomatous polyposis coli/beta-catenin mutation status and targeting JRK presents new opportunities for therapeutic intervention in cancer.

Type Journal
ISBN 1476-5594 (Electronic) 0950-9232 (Linking)
Authors Pangon, L.?; Ng, I.?; Giry-Laterriere, M.?; Currey, N.?; Morgan, A.?; Benthani, F.?; Tran, P. N.?; Al-Sohaily, S.?; Segelov, E.?; Parker, B. L.?; Cowley, M. J.?; Wright, D. C.?; St Heaps, L.?; Carey, L.?; Rooman, I.?; Kohonen-Corish, M. R.;
Garvan Authors Dr Laurent Pangon
Publisher Name ONCOGENE
Published Date 2016-06-01 00:00:00
Published Volume 35
Published Issue 22
Published Pages 2834-41
URL http://www.ncbi.nlm.nih.gov/pubmed/26455321
Status Published in-print