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Updated: Mar 15, 2026

Author Spotlight: Investigating Angiogenesis and Vessel Permeability Through a Modified Matrix Gel Plug Assay
Published on: June 30, 2023
Endothelial epsins as regulators and potential therapeutic targets of tumor angiogenesis
Kai Song1, Hao Wu1, H N Ashiqur Rahman1
1Vascular Biology Program, Karp Family Research Laboratory, Department of Surgery, Boston Children's Hospital, Harvard Medical School, 12.214, 300 Longwood Avenue, Boston, MA, 02115, USA.
Abstract:
VEGF-driven tumor angiogenesis has been validated as a central target in several tumor types deserving of continuous and further considerations to improve the efficacy and selectivity of the current therapeutic paradigms. Epsins, a family of endocytic clathrin adaptors, have been implicated in regulating endothelial cell VEGFR2 signaling, where its inactivation leads to nonproductive leaky neo-angiogenesis and, therefore, impedes tumor development and progression. Targeting endothelial epsins is of special significance due to its lack of affecting other angiogenic-signaling pathways or disrupting normal quiescent vessels, suggesting a selective modulation of tumor angiogenesis. This review highlights seminal findings on the critical role of endothelial epsins in tumor angiogenesis and their underlying molecular events, as well as strategies to prohibit the normal function of endogenous endothelial epsins that capitalize on these newly understood mechanisms.
Insights
Targeting epsins, proteins involved in cell signaling, can selectively inhibit tumor angiogenesis. This approach impedes tumor growth by disrupting leaky blood vessel formation without harming normal vessels.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Vascular Endothelial Growth Factor (VEGF)-driven tumor angiogenesis is a key therapeutic target.
- Epsins, endocytic clathrin adaptors, regulate endothelial cell VEGFR2 signaling.
- Dysfunctional epsins lead to nonproductive, leaky tumor angiogenesis, hindering tumor progression.
Purpose of the Study:
- To review the critical role of endothelial epsins in tumor angiogenesis.
- To elucidate the molecular mechanisms underlying epsin function in angiogenesis.
- To explore strategies for targeting endothelial epsins to inhibit tumor growth.
Main Methods:
- Literature review of seminal findings on epsins and tumor angiogenesis.
- Analysis of molecular events regulating endothelial cell signaling.
- Discussion of therapeutic strategies targeting epsins.
Main Results:
- Endothelial epsins are crucial regulators of tumor angiogenesis.
- Inactivation of epsins results in leaky neovascularization, impeding tumor progression.
- Targeting epsins offers selective modulation of tumor angiogenesis without affecting normal vessels.
Conclusions:
- Endothelial epsins represent a promising, selective target for anti-angiogenic cancer therapy.
- Understanding epsin mechanisms provides novel strategies to inhibit tumor vascularization.
- Targeting epsins could improve the efficacy of current therapeutic paradigms.
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