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Updated: May 17, 2026

A Matrigel-Based Tube Formation Assay to Assess the Vasculogenic Activity of Tumor Cells
Published on: September 7, 2011
Tumor vasculature: the Achilles' heel of cancer?
Tor-Christian Aase Johannessen1, Marek Wagner, Oddbjorn Straume
1University of Bergen, Department of Biomedicine, Jonas Lies vei 91, 5009 Bergen, Norway.
Introduction:
Tumor-associated angiogenesis is one of the essential hallmarks underlying cancer development and metastasis. Anti-angiogenic agents accordingly aim to restrain cancer progression by blocking the formation of new vessels, improving the delivery of chemotherapeutic agents to the tumor site and reducing the shedding of metastatic cells into the circulation. This review article addresses some key issues in the use of angiogenesis inhibitors in cancer.
Areas Covered:
The authors review the complex interactions between cell signaling pathways involved in tumor angiogenesis, and focus in particular on the molecular mechanisms that may induce resistance to angiogenesis inhibitors. They will also discuss some novel therapeutic strategies evolving within anti-angiogenic therapy such as the targeting of VEGFR-3, endothelial integrins and hepatocyte growth factor-MET signaling.
Expert Opinion:
Although anti-angiogenic therapy is targeted at the non-malignant part of the tumor, the intricate network of growth promoting signaling pathways and in particular the redundancy when single pathways are targeted in endothelial cells represents a major therapeutic obstacle. A key challenge will be to develop more efficient inhibitors, combined with an individualized approach based on each tumor's own endothelial signaling profile. Furthermore, reliable biomarkers which pinpoint those patients that will benefit from anti-angiogenic therapy need to be identified.
Insights
Anti-angiogenic therapy targets tumor blood vessel formation but faces challenges due to complex signaling pathways. Future strategies require more effective inhibitors and personalized approaches based on individual tumor profiles.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Tumor-associated angiogenesis is a key factor in cancer development and metastasis.
- Anti-angiogenic agents aim to inhibit new blood vessel formation to slow cancer progression.
- These agents can improve chemotherapy delivery and reduce cancer cell metastasis.
Purpose of the Study:
- To review key issues in the clinical application of angiogenesis inhibitors in cancer.
- To explore molecular mechanisms of resistance to anti-angiogenic therapy.
- To discuss novel therapeutic strategies in anti-angiogenic therapy.
Main Methods:
- Review of complex cell signaling pathways in tumor angiogenesis.
- Focus on molecular mechanisms inducing resistance to angiogenesis inhibitors.
- Discussion of emerging therapeutic strategies, including targeting VEGFR-3, endothelial integrins, and HGF-MET signaling.
Main Results:
- Complex signaling networks and pathway redundancy in endothelial cells pose therapeutic obstacles.
- Single-pathway targeting can lead to resistance in anti-angiogenic therapy.
- Novel strategies are emerging to overcome these limitations.
Conclusions:
- Developing more effective inhibitors is crucial for successful anti-angiogenic therapy.
- An individualized approach, considering each tumor's endothelial signaling profile, is necessary.
- Identification of reliable biomarkers is essential to select patients who will benefit from this therapy.
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