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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Ectopic expression of cyclin D1 impairs the proliferation and enhances the apoptosis of a murine lymphoid cell line.

Cyclin D1, a key regulator of the cell cycle, acts as an oncogene when over-expressed in several types of cancer. In some B-chronic lymphoproliferative disorders, the over-expression of cyclin D1 protein is thought to confer a proliferative phenotype. We have generated BaF3 pro-B cell derivatives in which cyclin D1 can be induced rapidly and reversibly in a dose-dependent manner by the hormone muristerone A. When non-expressing clones displayed the same proliferative capacity as the parental cell line, in the sub-clones, a moderate induction of cyclin D1 lengthened the proliferation rate. The over-expression of cyclin D1 had the same effects on cell proliferation but also led ultimately to cell death by apoptosis. The induction of cyclin D1 in growth factor-deprived cells as well as in anticancer drug-treated cells also reinforced the magnitude of apoptosis. Thus, the expression of cyclin D1 in lymphoid cells does not confer a proliferative advantage but rather alters the response of cells towards apoptotic stimuli in a p53-independent manner.[1]

References

  1. Ectopic expression of cyclin D1 impairs the proliferation and enhances the apoptosis of a murine lymphoid cell line. Duquesne, F., Florent, M., Roué, G., Troussard, X., Sola, B. Cell Death Differ. (2001) [Pubmed]
 
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