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Updated: Apr 23, 2026

An Ex Vivo Choroid Sprouting Assay of Ocular Microvascular Angiogenesis
Published on: August 6, 2020
Regulation of Tumor Angiogenesis and Choroidal Neovascularization by Endogenous Angioinhibitors
Venugopal Gunda1, Yakkanti A Sudhakar2
1The Eppley Institute for Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA.
Abstract:
Angiogenesis is the process of neovascularization from parent blood vessels, which is a prerequisite for many physiological and pathological conditions and is regulated by a balance between endogenous angioinhibitors and angioactivators or angiogenic factors. Imbalance between angioinhibitors and angioactivators is associated with neovascularization capacity during progression of tumor development and Choroidal Neovascularization (CNV). Normalization of pathological angiogenesis is considered as an alternative strategy to prevent the tumor growth in cancer progression or retinal damage in CNV. Various angioinhibitors are being identified and evaluated for their pathological angiogenesis regulation, of which endogenous angioinhibitors are one class derived either from extra cellular matrix or from non-extra cellular matrix of human origin. Endogenous angioinhibitors are gaining much significance as they interact with proliferating endothelial cells by binding to distinct integrins and non-integrin receptors, regulating different intracellular signaling mechanisms leading to inhibition of choroidal neovascularization and tumor growth. This review will focus on endogenous angioinhibitors and their receptor(s) mediated angioinhibitory signaling, which are of major concern in angiogenesis and their clinical and pharmaceutical implications.
Insights
Endogenous angioinhibitors regulate pathological angiogenesis by targeting endothelial cells. This review explores their mechanisms and clinical potential for treating conditions like cancer and Choroidal Neovascularization (CNV).
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Angiogenesis, the formation of new blood vessels, is crucial for physiological and pathological processes.
- An imbalance between angiogenic factors and angioinhibitors drives pathological angiogenesis in diseases like cancer and Choroidal Neovascularization (CNV).
- Normalizing aberrant angiogenesis is a therapeutic strategy for these conditions.
Purpose of the Study:
- To review endogenous angioinhibitors and their role in regulating pathological angiogenesis.
- To elucidate the receptor-mediated signaling pathways of endogenous angioinhibitors.
- To discuss the clinical and pharmaceutical implications of targeting these pathways.
Main Methods:
- Literature review focusing on endogenous angioinhibitors and their mechanisms of action.
- Analysis of signaling pathways involving integrin and non-integrin receptors.
- Evaluation of therapeutic potential in cancer and CNV.
Main Results:
- Endogenous angioinhibitors, derived from extracellular or non-extracellular matrix, inhibit endothelial cell proliferation.
- These inhibitors interact with specific cell surface receptors, modulating intracellular signaling.
- Targeting these pathways shows promise for controlling tumor growth and CNV.
Conclusions:
- Endogenous angioinhibitors represent a significant class of molecules for regulating pathological angiogenesis.
- Understanding their receptor interactions and signaling is key to developing novel therapies.
- Further research holds potential for clinical applications in oncology and ophthalmology.
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