alexa TP63 gene in stress response and carcinogenesis: a broader role than expected.
Oncology

Oncology

Advances in Cancer Prevention

Author(s): Petitjean A, Hainaut P, Caron de Fromentel C

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Abstract The TP63 gene is a member of the TP53 gene family. In contrast with TP53, this gene is not frequently inactivated by mutation in cancer. Initial experiments with disrupted TP63 have allowed specifying p63 protein a role in the regulation of differentiation and morphogenesis in epithelial and mesenchymal tissues. Nevertheless, there is growing evidence that p63 is also involved in oncogenesis through several mechanisms. Indeed, amplification of TP63 is detected in about 25\% of squamous cell carcinomas of lung, head and neck and oesophagus. This results in overexpression of a truncated form of p63 (DeltaNp63) that may counteract growth suppression induced by full length p63 (TAp63), as well as by the other family members, p53 and TAp73. Moreover, mice heterozygous for TP63 develop spontaneous tumours. Whereas p53 plays a major role in response to numerous DNA-damaging agents, the involvement of p63 in this process is not well documented. Nevertheless, several groups recently reported that TAp63 can induce cell cycle arrest and apoptosis in DNA-damaged cells, alone or in synergy with chemotherapeutic agents, and thus appears as a chemosensitivity factor. Overall, in addition to non-redundant, specific functions in differentiation and morphogenesis, p63 appears to exert biological functions similar to those of p53 and to take a growing place in oncogenesis and modulation of responses to anti-cancer therapy.
This article was published in Bull Cancer and referenced in Advances in Cancer Prevention

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