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Complement in lung disease

Vidya J Sarma1, Markus Huber-Lang, Peter A Ward

  • 1Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.

Autoimmunity
|August 23, 2006
PubMed

Insights

Complement proteins are key to immune responses. Their activation causes inflammation and cell damage, contributing to lung diseases like asthma and acute respiratory distress syndrome.

Area of Science:

  • Immunology
  • Pathophysiology
  • Respiratory Medicine

Background:

  • Complement proteins are crucial for innate and adaptive immunity.
  • Complement activation generates anaphylatoxins (C3a, C5a) and the membrane attack complex (C5b-9).
  • These mediators orchestrate inflammatory responses including cell recruitment and cytokine release.

Purpose of the Study:

  • To review recent findings on the role of complement in lung disease pathophysiology.
  • To highlight the involvement of complement activation in inflammatory lung conditions.

Main Methods:

  • Review of recent animal models and clinical data.
  • Analysis of the molecular mechanisms of complement activation in inflammation.

Main Results:

  • Complement activation drives key inflammatory events in the lungs.
  • Evidence links complement-mediated pathways to asthma and ARDS pathogenesis.
  • Specific complement components and their products are implicated in disease severity.

Conclusions:

  • The complement system is a significant contributor to lung disease development.
  • Targeting complement pathways may offer therapeutic strategies for respiratory diseases.
  • Further research is warranted to fully elucidate complement's role in lung pathology.

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