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Complement receptors CR1 on human peripheral nerve fibres

C A Vedeler1, R Matre

  • 1Broegelntann Research Laboratory for Microbiology, Gade Institute, University of Bergen, Norway.

Journal of Neuroimmunology
|March 1, 1988
PubMed

Insights

Complement receptors for C3 and C4 were investigated in human peripheral nerves. Complement Receptor 1 (CR1) was identified on myelinated nerve fibers, suggesting its role in nerve function.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Complement receptors play crucial roles in immune responses and cellular interactions.
  • Peripheral nerve tissue composition and function involve complex cellular and molecular mechanisms.

Purpose of the Study:

  • To investigate the presence and function of complement receptors (CR1, CR2, CR3) in human peripheral nerve tissue.
  • To determine the specific localization and distribution of these receptors within nerve structures.

Main Methods:

  • Erythrocyte adherence assays using complement-coated erythrocytes (E) to peripheral nerve sections.
  • Immunofluorescence staining with monoclonal antibodies against complement receptor 1 (CR1), CR2, and CR3.
  • Analysis of myelinated, unmyelinated, and fetal peripheral nerve tissues.

Main Results:

  • Complement Receptor 1 (CR1) was identified on myelinated peripheral nerve fibers, localized to Schwann cell membranes.
  • Erythrocytes coated with C3b or C4b adhered to myelinated nerves, with binding inhibited by anti-CR1 antibodies.
  • CR1 in unmyelinated and fetal nerves showed reduced functional activity or lower affinity for C3b/C4b compared to myelinated nerves.

Conclusions:

  • Complement Receptor 1 (CR1) is the primary complement C3 receptor expressed in human peripheral nerves.
  • CR1 expression and function in peripheral nerves may vary between myelinated, unmyelinated, and fetal tissues.
  • CR1 activity in myelinated peripheral nerves is consistent across individuals, suggesting a non-phenotypic distribution.

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