Inhibition of human breast cancer cell growth by blockade of the mevalonate-protein prenylation pathway is not prevented by overexpression of cyclin D1

D. Germano, C. Pacilio, M. Cancemi, L. Cicatiello, L. Altucci, V. Belsito Petrizzi, C. Sperandio, S. Salzano, R. J A M Michalides, Y. Taya, F. Bresciani, A. Weisz

Research output: Contribution to journalArticle

Abstract

Overexpression of the cyclin D1 (CCND1) gene, encoding a downstream effector of mitogenic signals that plays a central role in G1 phase progression, is often found in cancerous cells. In sporadic breast cancer (BC), this is one of the most frequent and early genetic lesions identified so far, found in more than 50% of the tumors. Inhibitors of the mevalonate/protein prenylation pathway belong to a new family of cancer therapeutic agents that act by blocking intracellular mitogenic signal transduction pathways, thereby preventing expansion of pre-cancerous foci and inhibiting growth of transformed cells. It is not known at present whether constitutively high intracellular levels of cyclin D1 might interfere with the cytostatic actions of mevalonate/protein prenylation inhibitors. This possibility was investigated here by assessing the cell cycle effects of Simvastatin, a non-toxic upstream inhibitor of the mevalonate pathway, on human BC MCF-7 cells expressing either normal or enhanced levels of cyclin D1 from of a stably transfected, tet-inducible expression vector. Results show that constitutive overexpression of this protein, such as that found in sporadic BCs, does not influence the growth inhibitory effects of Simvastatin in vitro. In addition, D1-overexpressing embryo fibroblasts were also found to be responsive to the cell cycle effects of mevalonate/protein prenylation pathway blockade, further suggesting that high intracellular levels of cyclin D1 do not prevent the cytostatic actions of compounds targeting this metabolic pathway.

Original languageEnglish
Pages (from-to)23-33
Number of pages11
JournalBreast Cancer Research and Treatment
Volume67
Issue number1
DOIs
Publication statusPublished - 2001

Keywords

  • Breast cancer
  • Cell cycle
  • Cyclin D1
  • Estrogen
  • HMG-CoA reductase
  • Protein prenylation
  • Retinoblastoma protein
  • Simvastatin

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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    Germano, D., Pacilio, C., Cancemi, M., Cicatiello, L., Altucci, L., Belsito Petrizzi, V., Sperandio, C., Salzano, S., Michalides, R. J. A. M., Taya, Y., Bresciani, F., & Weisz, A. (2001). Inhibition of human breast cancer cell growth by blockade of the mevalonate-protein prenylation pathway is not prevented by overexpression of cyclin D1. Breast Cancer Research and Treatment, 67(1), 23-33. https://doi.org/10.1023/A:1010675310188