FOXO factors: a matter of life and death - PubMed (original) (raw)

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FOXO factors: a matter of life and death

Haojie Huang et al. Future Oncol. 2006 Feb.

Abstract

Forkhead box O-class (FOXO) transcription factors, including FOXO1, FOXO3a and FOXO4, function as tumor-suppressor proteins by inhibiting cell proliferation, promoting apoptotic cell death and protecting cells from DNA damage and oxidative stress. The potency of these functions is regulated tightly by phosphorylation, acetylation and ubiquitination. Emerging evidence indicates that protein levels of FOXO1 are under dual regulation by Ak-mediated phosphorylation and Skp2-mediated ubiquitination. Given that Akt and Skp2 proteins are highly activated in human cancers due to the loss of phosphatase and tensin homolog (PTEN), deregulation of the FOXO1 protein appears to be a promising target for future drug discovery and cancer therapy.

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