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Related Experiment Videos

The alternative complement pathway revisited.

Morten Harboe1, Tom Eirik Mollnes

  • 1Institute of Immunology, University of Oslo and Rikshospitalet University Hospital, Oslo, Norway.

Journal of Cellular and Molecular Medicine
|April 19, 2008
PubMed
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The alternative complement pathway

Area of Science:

  • Immunology
  • Innate Immunity
  • Complement System

Background:

  • Alternative pathway amplification is crucial but quantitatively underestimated in complement activation.
  • The complement system and Toll-like receptors (TLRs) are key innate immunity recognition systems.
  • Dysregulated activation of these systems contributes to inflammatory diseases like sepsis.

Purpose of the Study:

  • To investigate the quantitative role of alternative pathway amplification in complement activation.
  • To explore the dual role of the alternative pathway as both a recognition and amplification system.
  • To evaluate combined inhibition of complement and TLRs/CD14 for treating sepsis.

Main Methods:

  • Experimental models of human diseases.
  • Analysis of C5 activation.

Related Experiment Videos

  • Investigation of complement and Toll-like receptor interactions.

    • Main Results:

    • Alternative pathway amplification significantly contributes to C5 activation, even with initial classical pathway specificity (80-90%).
    • Properdin's role as a direct initiator of the alternative pathway is highlighted.
    • Complement and TLRs/CD14 act as dual-edged swords in innate immunity.

    Conclusions:

    • The alternative pathway's amplification role is quantitatively more significant than previously recognized.
    • Combined inhibition of complement and TLRs/CD14 warrants investigation for sepsis treatment.
    • Targeting the alternative pathway's amplification may be crucial for managing sepsis-induced inflammation.