Journal article

The RNA polymerase I transcription inhibitor CX-5461 cooperates with topoisomerase 1 inhibition by enhancing the DNA damage response in homologous recombination-proficient high-grade serous ovarian cancer

Shunfei Yan, Jiachen Xuan, Natalie Brajanovski, Madeleine RC Tancock, Piyush B Madhamshettiwar, Kaylene J Simpson, Sarah Ellis, Jian Kang, Carleen Cullinane, Karen E Sheppard, Katherine M Hannan, Ross D Hannan, Elaine Sanij, Richard B Pearson, Keefe T Chan



BACKGROUND: Intrinsic and acquired drug resistance represent fundamental barriers to the cure of high-grade serous ovarian carcinoma (HGSC), the most common histological subtype accounting for the majority of ovarian cancer deaths. Defects in homologous recombination (HR) DNA repair are key determinants of sensitivity to chemotherapy and poly-ADP ribose polymerase inhibitors. Restoration of HR is a common mechanism of acquired resistance that results in patient mortality, highlighting the need to identify new therapies targeting HR-proficient disease. We have shown promise for CX-5461, a cancer therapeutic in early phase clinical trials, in treating HR-deficient HGSC. METHODS: Herein, we scr..

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Funding Acknowledgements

The China Scholarship Council University of Melbourne Ph.D. Scholarship supported S.Y. A National Health and Medical Research Council (NHMRC) Grant and NHMRC Senior Research Fellowship to R.B.P. supported this work. The Victorian Centre for Functional Genomics (K.J.S.) is funded by the Australian Cancer Research Foundation (ACRF), the Australian Phenomics Network (APN) through funding from the Australian Government's National Collaborative Research Infrastructure Strategy (NCRIS) programme, the Peter MacCallum Cancer Centre Foundation and the University of Melbourne Research Collaborative Infrastructure Programme.