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Tumor suppressor activity of CBX7 in lung carcinogenesis

Volume 11, Issue 10   May 15, 2012
Pages 1888 - 1891
http://dx.doi.org/10.4161/cc.20022
Authors: Floriana Forzati, Antonella Federico, Pierlorenzo Pallante, Monica Fedele and Alfredo Fusco

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Abstract:
The generation of knockout mice for the Cbx7 gene validates the tumor suppressor role of CBX7, whose expression is lost in several human malignancies. Indeed, these mice developed liver and lung adenomas and carcinomas. Cyclin E overexpression due to the lack of Cbx7 negative regulation of its expression likely accounts for the phenotype of the Cbx7-KO mice. A similar mechanism is likely involved in human lung carcinogenesis, since cyclin E upregulation associated with the loss of CBX7 expression has been observed in most of the human lung carcinomas analyzed.

Received: February 21, 2012; Accepted: March 13, 2012

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