Cyclin D1 restrains oncogene-induced autophagy by regulating the AMPK–LKB1 signaling axis

Mathew C. Casimiro, Gabriele Di Sante, Agnese Di Rocco, Emanuele Loro, Claudia Pupo, Timothy G. Pestell, Sara Bisetto, Marco A. Velasco-Velázquez, Xuanmao Jiao, Zhiping Li, Christine M. Kusminski, Erin L. Seifert, Chenguang Wang, Daniel Ly, Bin Zheng, Che Hung Shen, Philipp E. Scherer, Richard G. Pestell

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18 Scopus citations

Abstract

Autophagy activated after DNA damage or other stresses mitigates cellular damage by removing damaged proteins, lipids, and organelles. Activation of the master metabolic kinase AMPK enhances autophagy. Here we report that cyclin D1 restrains autophagy by modulating the activation of AMPK. In cell models of human breast cancer or in a cyclin D1–deficient model, we observed a cyclin D1–mediated reduction in AMPK activation. Mechanistic investigations showed that cyclin D1 inhibited mitochondrial function, promoted glycolysis, and reduced activation of AMPK (pT172), possibly through a mechanism that involves cyclin D1-Cdk4/Cdk6 phosphorylation of LKB1. Our findings suggest how AMPK activation by cyclin D1 may couple cell proliferation to energy homeostasis.

Original languageEnglish (US)
Pages (from-to)3391-3405
Number of pages15
JournalCancer Research
Volume77
Issue number13
DOIs
StatePublished - Jul 1 2017

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ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Casimiro, M. C., Di Sante, G., Di Rocco, A., Loro, E., Pupo, C., Pestell, T. G., Bisetto, S., Velasco-Velázquez, M. A., Jiao, X., Li, Z., Kusminski, C. M., Seifert, E. L., Wang, C., Ly, D., Zheng, B., Shen, C. H., Scherer, P. E., & Pestell, R. G. (2017). Cyclin D1 restrains oncogene-induced autophagy by regulating the AMPK–LKB1 signaling axis. Cancer Research, 77(13), 3391-3405. https://doi.org/10.1158/0008-5472.CAN-16-0425