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Related Experiment Videos

Distinct inflammatory gene pathways induced by particles.

Andrew D Pearle1, Mary K Crow, Diptendu S Rakshit

  • 1Shoulder and Sports Medicine Service, Hospital for Special Surgery, New York, NY 10021, USA. pearlea@hss.edu

Clinical Orthopaedics and Related Research
|January 17, 2007
PubMed
Summary
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Metal particles from joint replacements can activate T lymphocytes, leading to the release of inflammatory cytokines. This T cell activation by titanium debris suggests a role in osteolysis following metallic arthroplasty.

Area of Science:

  • Biomaterials Science
  • Immunology
  • Orthopedic Surgery

Background:

  • Particulate debris from arthroplasty can trigger an inflammatory response.
  • The specific role of lymphocytes in this response is not fully understood.

Purpose of the Study:

  • To investigate the contribution of lymphocytes to proinflammatory gene expression induced by metal particles.
  • To compare the effects of metal and polymethylmethacrylate particles on mononuclear cells.

Main Methods:

  • Peripheral blood mononuclear cells and monocytes were stimulated with polymethylmethacrylate and titanium particles.
  • Gene expression was analyzed using cDNA microarray profiling.

Main Results:

  • Polymethylmethacrylate particles significantly increased proinflammatory cytokine expression (TNF-α, IL-1α, IL-1β, IL-6, IL-8).

Related Experiment Videos

  • Titanium particles induced modest monocyte stimulation but significantly increased T lymphocyte-derived cytokines (IL-2, IFN-γ, IL-9, IL-22).
  • Titanium particles induced T cell activation in peripheral blood mononuclear cell cultures.

    • Conclusions:

    • Lymphocytes may contribute to inflammation and osteolysis associated with metallic particulate debris after total joint replacement.
    • Understanding lymphocyte involvement is crucial for managing implant-associated inflammation.