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Updated: Jul 23, 2026
08:40
Quantitative Analysis of Cancer Metastasis using an Avian Embryo Model
Published on: May 30, 2011
Integrin activation controls metastasis in human breast cancer
B Felding-Habermann1, T E O'Toole, J W Smith
1Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA. brunie@scripps.edu
Summary
Breast cancer metastasis, a leading cause of death, is linked to integrin alpha v beta 3 activation. Activated integrin alpha v beta 3 promotes tumor cell adhesion and metastasis by interacting with platelets.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Metastasis is the primary cause of mortality in human breast cancer.
- Cancer cell dissemination via bloodstream requires adhesion within vasculature.
- Integrins regulate blood cell adhesion and are activated by specific mechanisms.
Purpose of the Study:
- To investigate the role of integrin alpha v beta 3 in breast cancer cell metastasis.
- To determine if integrin alpha v beta 3 activation influences tumor cell adhesion under blood flow.
- To explore the therapeutic potential of targeting integrin alpha v beta 3 activation.
Main Methods:
- Utilized human breast cancer cells and MDA-MB 435 cell line variants.
- Assessed integrin alpha v beta 3 functional states (activated vs. nonactivated).
- Employed a severe combined immunodeficient mouse model to study metastasis in vivo.
Main Results:
- Integrin alpha v beta 3 supports breast cancer cell attachment under blood flow in an activation-dependent manner.
- Activated integrin alpha v beta 3 mediates tumor cell arrest via platelet interaction.
- Expression of constitutively activated integrin alpha v beta 3 mutant significantly promoted metastasis in mice.
Conclusions:
- Breast cancer cells can display a metastatic phenotype controlled by integrin alpha v beta 3 activation.
- Aberrant control of integrin activation in tumors may worsen breast cancer progression.
- Targeting integrin alpha v beta 3 activation presents a potential therapeutic strategy.
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