Journal
CANCER LETTERS
Volume 280, Issue 2, Pages 145-153Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2008.11.012
Keywords
Angiogenesis; HDAC; HDAC inhibitors; VGEF; HIF-1 alpha; Animal models; Clinical trials; Combination therapy; Gene regulation; mTOR inhibitors; Tyrosine kinase inhibitors; Angiogenesis inhibitors; Cancer
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Funding
- Schering AG
- Pfizer pharmaceuticals
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Solid tumor malignancies including breast, lung and prostate carcinomas are considered to be angiogenesis dependent. Tumor angiogenesis is often mediated by hypoxia secondary to tumor growth or by increased oncogenic signaling. Both mechanisms result in increased hypoxia-inducible factor-1 alpha (HIF-1 alpha) signaling and its transcriptional target vascular endothelial growth factor (VEGF). Critical to HIF-1 alpha signaling are post translational modifications including acetylation mediated by histone acetyltransferases (HATS) and deacetylation by histone deacetylases (HDACs). More recently, HDACs were shown to be up-regulated in response to hypoxia mediating increased HIF-1 alpha signaling. HDAC inhibitors represent a new class of anti-cancer therapeutics which show great promise at inhibiting angiogenesis in pre-clinical animal models and early phase clinical trials. This review will discuss the role of HIF-1 alpha and VEGF influence on tumor angiogenesis and how HDACs play a critical role in HIF-1 alpha transcriptional activity. Furthermore it will also be discussed how targeting HDACs via their inhibition create new avenues in treating solid malignancies by increasing the activity of established and novel therapeutic applications. (C) 2008 Published by Elsevier Ireland Ltd.
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