What question did this study set out to answer?

This research focuses on understanding how HIF-1 regulates angiogenic growth factor expression to promote angiogenesis.

Cell Type–Specific Regulation of Angiogenic Growth Factor Gene Expression and Induction of Angiogenesis in Nonischemic Tissue by a Constitutively Active Form of Hypoxia-Inducible Factor 1

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Randomized trial demonstrates HIF-1 induces angiogenesis in nonischemic tissue, suggesting new therapeutic strategies.

This research focuses on understanding how HIF-1 regulates angiogenic growth factor expression to promote angiogenesis.
Exposure of cardiac and vascular cell cultures to hypoxia and AdCA5, an adenovirus with active HIF-1alpha.
Analysis of gene expression for various angiogenic factors after injection of AdCA5 into mouse eyes.
Use of HIF-1alpha-null embryonic stem cells to observe loss-of-function effects.
AdCA5 injection caused increased expression of ANGPT1, ANGPT2, platelet-derived growth factor-B, placental growth factor, and VEGF mRNA.
Induced neovascularization in multiple capillary beds not responsive to VEGF alone.
Confirmed that HIF-1 serves as a master regulator of angiogenesis through the modulation of angiogenic factor gene expression.

Kelly et al. (2003) studied this question.

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