ArticleMolecular biotechnology2010
Hypoxia-specific downregulation of endogenous human VEGF-A gene by hypoxia-driven expression of artificial transcription factor.
Article in Molecular biotechnology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors at 2 institutions in 1 country.
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Abstract
Repression of vascular endothelial growth factor A (VEGF-A) is an attractive approach to cancer therapy. Although zinc-finger-based artificial transcription factors (ATFs) were constructed for human VEGF-A and constitutive expressions of ATFs were previously shown to downregulate the endogenous VEGF-A gene expression, repression of VEGF-A specifically in hypoxic tumors is desirable for therapeutic application of ATF technology. Here, we describe hypoxia-driven expression of the ATF for hypoxia-specific repression of human VEGF-A gene. We constructed a hypoxia-driven promoter for the ATF expression and placed it upstream of the ATF-encoding region. The resulting hypoxia-driven expression plasmids induced the expression of ATFs specifically in hypoxia, and the hypoxia-specific expression of ATFs effectively downregulated the VEGF-A expression in hypoxia, but not in normoxia. Thus, the engineered expression system of ATFs may enable repression of VEGF-A expression specifically in hypoxic tumors without affecting normal, healthy tissues.
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