Dysfunction of nucleus accumbens-1 activates cellular senescence and inhibits tumor cell proliferation and oncogenesis

Yi Zhang, Yan Cheng, Xingcong Ren, Tsukasa Hori, Kathryn J. Huber-Keener, Li Zhang, Kai Lee Yap, David Liu, Lisa Shantz, Zheng Hong Qin, Suping Zhang, Jianrong Wang, Hong Gang Wang, Ie Ming Shih, Jin Ming Yang*

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Nucleus accumbens-1 (NAC1), a nuclear factor belonging to the BTB/POZ gene family, has emerging roles in cancer. We report here that NAC1 acts as a negative regulator of cellular senescence in transformed and nontransformed cells, and dysfunction of NAC1 induces senescence and inhibits its oncogenic potential.Weshow that NAC1 deficiency markedly activates senescence and inhibits proliferation in tumor cells treated with sublethal doses of γ-irradiation. In mouse embryonic fibroblasts from NAC1 knockout mice, following infection with a Ras virus, NAC1-/- cells undergo significantly more senescence and are either nontransformed or less transformed in vitro and less tumorigenic in vivo when compared with NAC1+/+ cells. Furthermore, we show that the NAC1-caused senescence blunting is mediated by ΔNp63, which exerts its effect on senescence through p21, and that NAC1 activates transcription of ΔNp63 under stressful conditions. Our results not only reveal a previously unrecognized function of NAC1, the molecular pathway involved and its impact on pathogenesis of tumor initiation and development, but also identify a novel senescence regulator that may be exploited as a potential target for cancer prevention and treatment.

Original languageEnglish (US)
Pages (from-to)4262-4275
Number of pages14
JournalCancer Research
Volume72
Issue number16
DOIs
StatePublished - Aug 15 2012

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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    Zhang, Y., Cheng, Y., Ren, X., Hori, T., Huber-Keener, K. J., Zhang, L., Yap, K. L., Liu, D., Shantz, L., Qin, Z. H., Zhang, S., Wang, J., Wang, H. G., Shih, I. M., & Yang, J. M. (2012). Dysfunction of nucleus accumbens-1 activates cellular senescence and inhibits tumor cell proliferation and oncogenesis. Cancer Research, 72(16), 4262-4275. https://doi.org/10.1158/0008-5472.CAN-12-0139