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Related Experiment Videos

Cell-cell interactions in the rheumatoid joint

M K McGuire, J E Meats, R G Russell

    Agents and Actions
    |December 1, 1980
    PubMed
    Summary
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    Normal human synovium produces less prostaglandin E (PGE) than rheumatoid synovium in culture. However, this difference disappears in monolayer cell cultures, suggesting cellular interactions influence PGE production in joint tissues.

    Area of Science:

    • Rheumatology
    • Cell Biology
    • Biochemistry

    Background:

    • Rheumatoid synovium is well-studied in organ culture, focusing on prostaglandin and proteinase synthesis.
    • The behavior of normal human synovium in culture is less characterized.
    • Understanding normal synovium is crucial for comparative studies with diseased states.

    Purpose of the Study:

    • To characterize the behavior of normal human synovium in culture.
    • To compare prostaglandin E (PGE) production between normal and rheumatoid synovium.
    • To investigate factors influencing PGE production in synovial cells and chondrocytes.

    Main Methods:

    • Organ culture of synovial tissue fragments.
    • Enzymatic dispersion of synovial tissue into single cells.

    Related Experiment Videos

  • Monolayer cell culture of synovial cells and articular chondrocytes.
  • Measurement of prostaglandin E (PGE) production.

    • Main Results:

    • Normal synovial tissue fragments produced significantly less PGE than rheumatoid synovium fragments.
    • The difference in PGE production between normal and rheumatoid synovial cells diminished in monolayer culture.
    • PGE production in both normal and rheumatoid synovial cells was reactivated by mononuclear blood cell products and synovial tissue-derived factors.
    • These factors also stimulated PGE production in human articular chondrocytes.

    Conclusions:

    • Cellular interactions, potentially involving mononuclear cells and synovial tissue factors, play a significant role in regulating PGE production.
    • These interactions may be dysregulated in arthritic joints, contributing to joint structure destruction.
    • In vitro findings suggest a mechanism for inflammatory mediator production in arthritis.