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Dissipative structures in proteoglycan solutions.

G S Harper, W D Comper, B N Preston

    The Journal of Biological Chemistry
    |August 25, 1984
    PubMed
    Summary
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    Proteoglycan solutions form fluid structures, enabling rapid transport of polymers and cells. This self-organization phenomenon, driven by concentration gradients, may occur in connective tissues.

    Area of Science:

    • Biophysics
    • Materials Science
    • Biochemistry

    Background:

    • Proteoglycans are crucial components of the extracellular matrix.
    • Understanding transport mechanisms in complex biological fluids is essential.

    Purpose of the Study:

    • To investigate the formation of dissipative structures in proteoglycan solutions.
    • To analyze the impact of concentration gradients on polymer transport.

    Main Methods:

    • Studied diffusion in multicomponent proteoglycan solutions.
    • Varied solute distribution, concentration, size, and chemical composition.
    • Observed structure formation and transport phenomena.

    Main Results:

    • Concentration gradients induced rapid proteoglycan transport (up to 300-fold increase).

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  • Dissipative structures facilitated transport of cells and solutes.
  • Flows were observed upon addition of enzymes or hyaluronic acid.

    • Conclusions:

    • Proteoglycan solutions exhibit spontaneous self-organization into fluid dissipative structures.
    • These structures drive rapid transport, potentially mimicking processes in the extracellular matrix.
    • Findings suggest similar self-organization mechanisms in connective tissues.