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Updated: Jul 11, 2025

High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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Diverse Functions of C4b-Binding Protein in Health and Disease

Lacie M Werner1, Alison K Criss1

  • 1Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA.

Journal of Immunology (Baltimore, Md. : 1950)
|November 6, 2023
PubMed

Insights

C4b-binding protein (C4BP) is a complement inhibitor that prevents pathway activation. Emerging research reveals C4BP also has complement-independent roles in cell survival and protecting against autoimmune damage.

Area of Science:

  • Immunology
  • Biochemistry

Background:

  • C4b-binding protein (C4BP) is a key fluid-phase inhibitor of the classical and lectin complement pathways.
  • C4BP is known to promote apoptotic cell death and is utilized by pathogens and tumors for immune evasion.

Approach:

  • This review synthesizes current knowledge on human C4BP structure and function.
  • Focuses on C4BP activities beyond its established role in complement inhibition.

Key Points:

  • C4BP exhibits complement-independent functions.
  • These functions include promoting cell survival and protecting against autoimmune damage.
  • C4BP also modulates the virulence of microbial pathogens.

Conclusions:

  • C4BP possesses multifaceted roles extending beyond complement regulation.
  • Understanding these diverse functions is crucial for therapeutic development.

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