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The complement system in B cell regulation.

Michael C Carroll1

  • 1Department of Pediatrics, The CBR Institute for Biomedical Research Inc., Harvard Medical School, 800 Huntington Ave., Boston, MA 02115, USA. caroll@cbr.med.harvard.edu

Molecular Immunology
|May 26, 2004
PubMed
Summary
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The complement system is crucial for humoral immunity, directly impacting B cell responses and differentiation. This review details its role across five key stages of B cell development.

Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • Early studies suggested complement system involvement in humoral immunity based on natural deficiencies.
  • Complement receptors CD21 and CD35 on B lymphocytes indicated a direct role in linking innate and adaptive immunity.

Purpose of the Study:

  • To review the multifaceted role of the complement system in B cell differentiation.
  • To highlight complement's participation in distinct stages of humoral immune responses.

Main Methods:

  • Review of early animal studies with natural complement deficiencies.
  • Analysis of studies involving mice with targeted deficiencies in complement proteins (C3, C4) and receptors (CD21/CD35).

Main Results:

  • Complement system is vital for B cell responses in vivo.

Related Experiment Videos

  • Complement influences multiple distinct stages of B cell differentiation.
  • Evidence confirms complement's role in linking innate and adaptive immunity.

    • Conclusions:

    • The complement system plays a significant and diverse role throughout B cell differentiation.
    • Understanding complement's function is key to comprehending humoral immunity.