TACC3 deregulates the DNA damage response and confers sensitivity to radiation and PARP inhibition

G. H. Ha, J. L. Kim, A. Petersson, S. Oh, M. F. Denning, T. Patel, E. K. Breuer

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Deregulation of the transforming acidic coiled-coil protein 3 (TACC3), an important factor in the centrosome-microtubule system, has been linked to a variety of human cancer types. We have recently reported on the oncogenic potential of TACC3; however, the molecular mechanisms by which TACC3 mediates oncogenic function remain to be elucidated. In this study, we show that high levels of TACC3 lead to the accumulation of DNA double-strand breaks (DSBs) and disrupt the normal cellular response to DNA damage, at least in part, by negatively regulating the expression of ataxia telangiectasia mutated (ATM) and the subsequent DNA damage response (DDR) signaling cascade. Cells expressing high levels of TACC3 display defective checkpoints and DSB-mediated homologous recombination (HR) and non-homologous end joining (NHEJ) repair systems, leading to genomic instability. Importantly, high levels of TACC3 confer cellular sensitization to radiation and poly(ADP-ribose) polymerase (PARP) inhibition. Overall, our findings provide critical information regarding the mechanisms by which TACC3 contributes to genomic instability, potentially leading to cancer development, and suggest a novel prognostic, diagnostic and therapeutic strategy for the treatment of cancer types expressing high levels of TACC3.

Original languageEnglish (US)
Pages (from-to)1667-1678
Number of pages12
JournalOncogene
Volume34
Issue number13
DOIs
StatePublished - Mar 26 2015
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

Fingerprint

Dive into the research topics of 'TACC3 deregulates the DNA damage response and confers sensitivity to radiation and PARP inhibition'. Together they form a unique fingerprint.

Cite this