SIRT1 deacetylates and stabilizes hypoxia-inducible factor-1 alpha (HIF-1 alpha) via direct interactions during hypoxia
- Authors
- Joo, Hyun-Yoo; Yun, Miyong; Jeong, Jaemin; Park, Eun-Ran; Shin, Hyun-Jin; Woo, Seon Rang; Jung, Jin Kyu; Kim, Yong-Min; Park, Joong-Jean; Kim, Joon; Lee, Kee-Ho
- Issue Date
- 10-7월-2015
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- SIRT1; HIF-1 alpha; Stabilization; Deacetylation; Interaction; Invasion
- Citation
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, v.462, no.4, pp.294 - 300
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
- Volume
- 462
- Number
- 4
- Start Page
- 294
- End Page
- 300
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93020
- DOI
- 10.1016/j.bbrc.2015.04.119
- ISSN
- 0006-291X
- Abstract
- Upon shift to a hypoxic environment, cellular HIF-1 alpha protein is stabilized, with a rapid decline in oxygen-sensitive hydroxylation. Several additional post-translational modifications of HIF-1 alpha are critical in controlling protein stability during hypoxia. In the present study, we showed that SIRT1 stabilizes HIF-1 alpha via direct binding and deacetylation during hypoxia. SIRT1 depletion or inactivation led to reduced hypoxic HIF-1 alpha accumulation, accompanied by an increase in HIF-1 alpha acetylation. Impaired HIF-1 alpha accumulation was recovered upon inhibition of 26S proteasome activity, indicating that SIRT1 is essential for HIF-1 alpha stabilization during hypoxia. Consistently, HIF-1 alpha accumulation was enhanced upon overexpression of wild-type SIRT1, but not its dominant-negative form. SIRT1-mediated accumulation of HIFI a protein led to increased expression of HIF-1 alpha target genes, including VEGF, GLUT1 and MMP2, and ultimate promotion of cancer cell invasion. These findings collectively imply that hypoxic HIF-1 alpha stabilization requires SIRT1 activation. Furthermore, SIRT1 protection of HIF-1 alpha from acetylation may be a prerequisite for stabilization and consequent enhancement of cell invasion. (C) 2015 Elsevier Inc. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Medicine > Department of Medical Science > 1. Journal Articles
- Graduate School > Department of Life Sciences > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.