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The Absence of p53 Aggravates Polyploidy and Centrosome Number Abnormality Induced by Aurora-C Overexpression
Stéphanie Dutertre, Elise Hamard-Péron, Jean-Yves Cremet, Yann Thomas and Claude Prigent
volume 4 | issue 12
december 2005Pages: 1783 - 1787
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Aurora-C is the third member of the aurora serine/threonine kinase family and was found only in mammals. Because Aurora-C is overexpressed in many different types of cancer cells we decided to analyze the consequences of Aurora-C overexpression in human cells. We first investigated the subcellular localization of overexpressed GFP-Aurora-C in mitosis and interphase in HeLa cells. As expected, during mitosis, we found that Aurora-C mimics Aurora-B. Surprisingly, in few interphase cells, we found that Aurora-C localized to the centrosome, like Aurora-A. We then examined the phenotype generated by Aurora-C overexpression. Basically it looked similar to the phenotypes observed after overexpression of the other Aurora kinases. We observed an augmentation of polyploid cells containing more than two centrosomes. More interestingly this phenotype was aggravated in the absence of a functional p53. Although the physiological function of Aurora-C in somatic cells remains to be clarified, our results, just like for the two other Aurora kinases, raised the question of a role of Aurora-C in the development and progression of cancer especially in the presence of mutated p53.
We now provide open access to journal articles published online for one year or more. This article may be downloaded at the following link:
Download PDF If the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.