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Related Experiment Videos

FHL-1/reconectin: a human complement and immune regulator with cell-adhesive function.

P F Zipfel1, C Skerka

  • 1Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany. zipfel@uke.uni-hamburg.de

Immunology Today
|April 22, 1999
PubMed
Summary

A new protein, factor H-like protein 1 (FHL-1), regulates the alternative complement pathway. This immune protein also connects innate immunity with cell adhesion functions.

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Area of Science:

  • Immunology
  • Complement System Biology
  • Molecular Medicine

Background:

  • The alternative complement pathway is crucial for innate immunity.
  • Factor H is a key regulator of this pathway.
  • A previously identified Factor H-like protein 1 (FHL-1) has unknown functions.

Purpose of the Study:

  • To investigate the functional role of FHL-1 in the alternative complement pathway.
  • To determine if FHL-1 acts as a complement regulator.
  • To explore FHL-1's potential role in cell adhesion.

Main Methods:

  • Functional assays using purified FHL-1.
  • Complement-mediated cell lysis experiments.
  • Cell adhesion assays.

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Main Results:

  • FHL-1 demonstrated regulatory functions on the alternative complement pathway, similar to Factor H.
  • FHL-1 was shown to bind to complement activators.
  • FHL-1 promoted cell adhesion, suggesting a dual role.

Conclusions:

  • FHL-1 is a novel regulator of the alternative complement pathway.
  • FHL-1 acts as a molecular link between immune defense and cell adhesion.