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Related Experiment Videos

Adhesive substrates for fibronectin

R J Klebe, K L Bentley, R C Schoen

    Journal of Cellular Physiology
    |December 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Fibronectin activation for cell attachment depends on substrate properties. Hydrophobic materials promote fibronectin activation and cell growth, while hydrophilic ones do not, indicating a nonspecific binding interaction.

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    Area of Science:

    • Biomaterials Science
    • Cell Biology
    • Surface Chemistry

    Background:

    • Cell attachment is crucial for cell growth and function.
    • Fibronectin (FN) is a key extracellular matrix protein mediating cell adhesion.
    • Substrate properties significantly influence protein adsorption and cell behavior.

    Purpose of the Study:

    • To survey various materials for their ability to bind and activate fibronectin.
    • To assess substrate effects on fibronectin-mediated cell attachment and growth.
    • To elucidate the mechanisms of fibronectin-substrate interactions.

    Main Methods:

    • Screening of 52 diverse materials (plastics, polysaccharides, metals, ceramics).
    • Assessing fibronectin binding and activation using cell attachment assays.

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  • Evaluating cell growth on different substrates.
  • Investigating the role of substrate hydrophobicity/hydrophilicity.

    • Main Results:

    • Many tested materials supported cell growth and fibronectin-dependent attachment.
    • Hydrophobic substrates activated fibronectin, while hydrophilic ones did not.
    • Fibronectin binding to artificial substrates is largely nonspecific (hydrophobic interaction).
    • The interaction between fibronectin and collagen showed biological specificity.
    • Poly(hydroxyethylmethacrylate) (poly(HEMA)) uniquely failed to bind fibronectin unless modified.

    Conclusions:

    • Substrate chemistry dictates fibronectin activation and subsequent cell attachment.
    • Nonspecific hydrophobic interactions dominate fibronectin binding to artificial surfaces.
    • Specific interactions, like with collagen, are distinct from general binding.
    • Material surface modification can restore fibronectin binding and cell adhesion capabilities.