Related Experiment Videos
Extracellular matrix as a solid-state regulator in angiogenesis: identification of new targets for anti-cancer
1Department of Surgery, Children's Hospital, Boston, MA 02115.
Abstract:
Angiogenesis, the growth of blood capillaries, is regulated by soluble growth factors and insoluble extracellular matrix (ECM) molecules. Soluble angiogenic mitogens act over large distances to initiate capillary growth whereas changes in ECM govern whether individual cells will grow, differentiate, or involute in response to these stimuli in the local tissue microenvironment. Analysis of this local control mechanism has revealed that ECM molecules switch capillary endothelial cells between differentiation and growth by both binding specific transmembrane integrin receptors and physically resisting cell-generated mechanical loads that are applied to these receptors. Control of capillary endothelial cell form and function therefore may be exerted by altering the mechanical properties of the ECM as well as its chemical composition. Understanding of this mechanochemical control mechanism has led to the development of new angiogenesis inhibitors that may be useful for the treatment of cancer.
Insights
The extracellular matrix (ECM) regulates blood vessel growth (angiogenesis) by influencing endothelial cell behavior through mechanical and chemical cues. Understanding this mechanochemical control aids in developing new cancer treatments.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Biochemistry
Background:
- Angiogenesis, the formation of new blood vessels, is crucial for tissue development and repair.
- It is regulated by soluble growth factors and extracellular matrix (ECM) molecules.
- The ECM's physical and chemical properties influence endothelial cell responses.
Purpose of the Study:
- To investigate how extracellular matrix (ECM) molecules control capillary endothelial cell growth and differentiation.
- To elucidate the mechanochemical mechanisms governing angiogenesis.
Main Methods:
- Analysis of the local control mechanisms of angiogenesis.
- Investigating the role of ECM binding to integrin receptors.
- Assessing the impact of mechanical resistance on endothelial cell behavior.
Main Results:
- ECM molecules dictate endothelial cell fate (growth, differentiation, involution) by binding integrin receptors.
- Physical resistance from the ECM, in addition to chemical signaling, modulates cell responses.
- Capillary endothelial cell form and function are controlled by both ECM mechanical properties and composition.
Conclusions:
- Angiogenesis is a mechanochemical process influenced by ECM properties.
- Understanding these mechanisms can lead to novel therapeutic strategies.
- New angiogenesis inhibitors targeting this pathway show potential for cancer treatment.