Vitronectin-Mediated Cell Interaction Mechanisms

Vitronectin is a multifunctional glycoprotein present in plasma and deposited within the extracellular matrix, where it orchestrates a suite of cellular behaviours through interactions with cell-surface receptors and matrix components. Central to its activity is the RGD (Arg-Gly-Asp) motif, which engages integrin receptors—particularly αvβ3 and αvβ5—to regulate cell adhesion, spreading and migration. Conformational rearrangements expose cryptic binding domains for protease inhibitors and glycosaminoglycans, thereby modulating fibrinolysis, coagulation and tissue remodelling. Beyond its adhesive roles, vitronectin acts as a signalling scaffold: binding to integrins recruits focal adhesion kinase and downstream effectors such as STAT3 to sustain mitochondrial bioenergetics and promote cell survival. In the nervous system, vitronectin–integrin engagement supports neurite outgrowth, preserves blood–brain barrier integrity and may influence neurodegenerative processes. Through its versatility in receptor recognition, vitronectin underpins wound healing, angiogenesis and stem-cell maintenance, making it a focal point for therapeutic strategies in tissue regeneration, cancer metastasis and neuroprotection.

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Vitronectin-Mediated Cell Interaction Mechanisms publication trend

The graph below shows the total number of articles in vitronectin-mediated cell interaction mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

RGD motif: A tripeptide sequence (Arg-Gly-Asp) in vitronectin that binds integrin receptors to mediate cell adhesion.

Integrin: A family of transmembrane heterodimeric receptors that connect extracellular ligands to intracellular cytoskeletal and signalling networks.

Glycosaminoglycan (GAG): A linear polysaccharide chain, such as heparin, that associates with vitronectin to regulate its conformation and multimerisation.

Somatomedin B domain: A compact N-terminal region of vitronectin that binds plasminogen activator inhibitor-1 and contributes to cell-surface receptor interactions.

Focal adhesion kinase (FAK): A cytoplasmic tyrosine kinase activated by integrin clustering that links adhesion receptors to downstream survival and growth pathways.

References

1. Integrin-FAK signaling rapidly and potently promotes mitochondrial function through STAT3. Cell Communication and Signaling (2016).
2. Role of Vitronectin and Its Receptors in Neuronal Function and Neurodegenerative Diseases. International Journal of Molecular Sciences (2022).
3. The Solution Structure of the N-terminal Domain of Human Vitronectin PROXIMAL SITES THAT REGULATE FIBRINOLYSIS AND CELL MIGRATION*. Journal of Biological Chemistry (2004).