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- W2806063971 abstract "Poly(ADP-ribose) polymerase (PARP)-1 may act in an error-prone pathway called alternative end joining (Alt-EJ) for DNA double-strand break (DSB) repair when nonhomologous end joining is defective. We examined the recruitment of PARP-1 to chromatin in response to radiomimetic agents and the effects of PARP-1 inhibition on DSB repair and recruitment of the meiotic recombination (MRE)-11-double-strand break repair (RAD50) protein-Nijmegen breakage syndrome (NSB)-1 (MRN) complex to the chromatin in Ku70-deficient breast cancer cells. The chromatin-binding affinity of PARP-1 was enhanced in response to neocarzinostatin (NCS) or ca- licheamicin treatment in the absence of Ku70. PARP-1 inhibition impaired the repair of both NCS-induced DSBs and intron-encoded endonuclease from Physarumpolycephalum-induced site-specific DSB. Both fractionation and chromatin immunoprecipitation assays demonstrated that chromatin recruitment of MRN was PARP-1 dependent. These data suggest that PARP-1 is vital for DSB repair in breast cancer cells when Alt-EJ is activated.—Huang, Y., Shao, Q., Luo, X., Yang, D., Zeng, B., Xiang, T., Ren, G., Cheng, Q. Poly(ADP-ribose) polymerase-1 promotes recruitment of meiotic recombination-11 to chromatin and DNA double-strand break repair in Ku70-deficient breast cancer cells. FASEB J. 32, 6112–6122 (2018). www.fasebj.org" @default.
- W2806063971 created "2018-06-13" @default.
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- W2806063971 date "2018-06-06" @default.
- W2806063971 modified "2023-10-12" @default.
- W2806063971 title "Poly(ADP‐ribose) polymerase‐1 promotes recruitment of meiotic recombination‐11 to chromatin and DNA double‐strand break repair in Ku70‐deficient breast cancer cells" @default.
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- W2806063971 doi "https://doi.org/10.1096/fj.201800092r" @default.
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