Mechanisms of oncogenic chromosomal translocations

Michael Byrne, Justin Wray, Brian Reinert, Yuehan Wu, Jac Nickoloff, Suk Hee Lee, Robert Hromas, Elizabeth Williamson

Producción científica: Articlerevisión exhaustiva

31 Citas (Scopus)


Chromosome translocations are caused by inappropriate religation of two DNA double-strand breaks (DSBs) in heterologous chromosomes. These DSBs can be generated by endogenous or exogenous sources. Endogenous sources of DSBs leading to translocations include inappropriate recombination activating gene (RAG) or activation-induced deaminase (AID) activity during immune receptor maturation. Endogenous DSBs can also occur at noncanonical DNA structures or at collapsed replication forks. Exogenous sources of DSBs leading to translocations include ionizing radiation (IR) and cancer chemotherapy. Spatial proximity of the heterologous chromosomes is also important for translocations. While three distinct pathways for DNA DSB repair exist, mounting evidence supports alternative nonhomologous end joining (aNHEJ) as the predominant pathway through which the majority of translocations occur. Initiated by poly (ADP-ribose) polymerase 1 (PARP1), aNHEJ is utilized less frequently in DNA DSB repair than other forms of DSB repair. We recently found that PARP1 is essential for chromosomal translocations to occur and that small molecule PARP1 inhibitors, already in clinical use, can inhibit translocations generated by IR or topoisomerase II inhibition. These data confirm the central role of PARP1 in aNHEJ-mediated chromosomal translocations and raise the possibility of using clinically available PARP1 inhibitors in patients who are at high risk for secondary oncogenic chromosomal translocations.

Idioma originalEnglish (US)
Páginas (desde-hasta)89-97
Número de páginas9
PublicaciónAnnals of the New York Academy of Sciences
EstadoPublished - mar 2014
Publicado de forma externa

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Neuroscience
  • History and Philosophy of Science


Profundice en los temas de investigación de 'Mechanisms of oncogenic chromosomal translocations'. En conjunto forman una huella única.

Citar esto