cAMP signalling inhibits p53 acetylation and apoptosis via HDAC and SIRT deacetylases

  • Authors:
    • Martine Müller Kloster
    • Elin Hallan Naderi
    • Ingvild Haaland
    • Bjørn Tore Gjertsen
    • Heidi Kiil Blomhoff
    • Soheil Naderi
  • View Affiliations

  • Published online on: March 8, 2013     https://doi.org/10.3892/ijo.2013.1853
  • Pages: 1815-1821
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Abstract

Activation of cAMP signalling potently inhibits DNA damage-induced apoptosis in acute lymphoblastic leukemia cells by promoting the turnover of p53 protein. Recently, we showed that the cAMP-induced destabilization of p53 in DNA-damaged cells occurs as a result of enhanced interaction between p53 and HDM2. In this report, we present results showing that increased levels of cAMP in cells with DNA damage enhances the deacetylation of p53, an event that facilitates the interaction of p53 with HDM2, thus annulling the stabilizing effect of DNA damage on p53. The combined inhibition of the HDAC and SIRT1 deacetylases abolished the cAMP-mediated deacetylation of p53, implying that cAMP-mediated deacetylation of p53 is dependent on the activity of these two classes of histone deacetylases. Importantly, diminishing the activity of HDACs and SIRT1 was also found to reverse the inhibitory effect of cAMP on the DNA damage-induced p53 stabilization and apoptosis, suggesting the involvement of the p53 acetylation pathway in the anti-apoptotic effect of cAMP signalling.
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May 2013
Volume 42 Issue 5

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Kloster MM, Naderi EH, Haaland I, Gjertsen BT, Blomhoff HK and Naderi S: cAMP signalling inhibits p53 acetylation and apoptosis via HDAC and SIRT deacetylases. Int J Oncol 42: 1815-1821, 2013
APA
Kloster, M.M., Naderi, E.H., Haaland, I., Gjertsen, B.T., Blomhoff, H.K., & Naderi, S. (2013). cAMP signalling inhibits p53 acetylation and apoptosis via HDAC and SIRT deacetylases. International Journal of Oncology, 42, 1815-1821. https://doi.org/10.3892/ijo.2013.1853
MLA
Kloster, M. M., Naderi, E. H., Haaland, I., Gjertsen, B. T., Blomhoff, H. K., Naderi, S."cAMP signalling inhibits p53 acetylation and apoptosis via HDAC and SIRT deacetylases". International Journal of Oncology 42.5 (2013): 1815-1821.
Chicago
Kloster, M. M., Naderi, E. H., Haaland, I., Gjertsen, B. T., Blomhoff, H. K., Naderi, S."cAMP signalling inhibits p53 acetylation and apoptosis via HDAC and SIRT deacetylases". International Journal of Oncology 42, no. 5 (2013): 1815-1821. https://doi.org/10.3892/ijo.2013.1853