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Evaluation of the Interplay Between the Complement Protein C1q and Hyaluronic Acid in Promoting Cell Adhesion
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Native hyaluronan produces less hypersensitivity than cross-linked hyaluronan.

Randal S Goomer1, Karen Leslie, Thira Maris

  • 1Department of Orthopedics, UCSD-School of Medicine, La Jolla, CA, USA. rgoomer@ucsd.edu

Clinical Orthopaedics and Related Research
|May 3, 2005
PubMed
Summary
This summary is machine-generated.

Cross-linked hyaluronan injections for osteoarthritis may trigger delayed-type hypersensitivity reactions in some patients. Native hyaluronan showed significantly less immune response, indicating potential differences in immunogenicity between forms.

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Area of Science:

  • Immunology
  • Biomaterials Science
  • Rheumatology

Background:

  • Hyaluronan injections are common osteoarthritis treatments.
  • Both native and cross-linked hyaluronan products are FDA-approved.
  • Concerns exist regarding potential antigenic reactions to hyaluronan treatments.

Purpose of the Study:

  • To evaluate the immunologic reactions to native and cross-linked hyaluronan.
  • To assess potential delayed-type hypersensitivity and antibody production.

Main Methods:

  • Guinea pigs were sensitized to hyaluronan via subcutaneous injections.
  • Active cutaneous and delayed-type hypersensitivity were studied.
  • Antihyaluronan antibodies were measured using indirect competitive ELISAs.

Main Results:

  • Synvisc (cross-linked hyaluronan) induced delayed-type hypersensitivity in guinea pigs.
  • Native hyaluronan did not induce significant hypersensitivity.
  • Sera from animals sensitized to cross-linked hyaluronan showed increased antihyaluronan antibodies.

Conclusions:

  • Artificially cross-linked hyaluronan can elicit a hypersensitivity response.
  • Native hyaluronan appears less immunogenic compared to cross-linked forms.
  • The immunogenicity of cross-linked hyaluronan may be due to elicitation of specific immunoglobulins.