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Human papillomavirus E7 enhances hypoxia-inducible factor 1-mediated transcription by inhibiting binding of histone deacetylases.

Abstract：

:Infection by human papillomaviruses (HPV) leads to the formation of benign lesions, warts, and in some cases, cervical cancer. The formation of these lesions is dependent upon increased expression of proangiogenic factors. Angiogenesis is linked to tissue hypoxia through the activity of the oxygen-sensitive hypoxia-inducible factor 1α (HIF-1α). Our studies indicate that the HPV E7 protein enhances HIF-1 transcriptional activity whereas E6 functions to counteract the repressive effects of p53. Both high- and low-risk HPV E7 proteins were found to bind to HIF-1α through a domain located in the N-terminus. Importantly, the ability of E7 to enhance HIF-1 activity mapped to the C-terminus and correlated with the displacement of the histone deacetylases HDAC1, HDAC4, and HDAC7 from HIF-1α by E7. Our findings describe a novel role of the E7 oncoprotein in activating the function of a key transcription factor mediating hypoxic responses by blocking the binding of HDACs.

journal_name

Cancer Res

journal_title

Cancer research

authors

Bodily JM,Mehta KP,Laimins LA

doi

10.1158/0008-5472.CAN-10-2626

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

1187-95

issue

3

eissn

0008-5472

issn

1538-7445

pii

0008-5472.CAN-10-2626

journal_volume

71

pub_type

杂志文章

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