Animal models of inherited complement deficiency

Area of Science:

• Immunology
• Molecular Biology
• Pathogenesis Research

Background:

• Natural deficiencies in complement components have been identified across various animal species.
• These deficiencies are often characterized at the molecular level, providing insights into complement system function.
• Previous research has utilized murine strains deficient in complement component C5.

Purpose of the Study:

• To explore the role of specific complement factors and pathways in disease pathogenesis using naturally deficient animal models.
• To investigate the pathogenetic role of the terminal membrane attack complex (MAC) in inflammatory conditions.
• To advance understanding of the activated complement system in experimental inflammatory diseases.

Main Methods:

• Characterization of natural complement component deficiencies in various animal species.
• Utilizing animal models with deficiencies in early complement factors, C3, and C6.
• Integrating findings from naturally deficient strains with studies on knockout animals.

Main Results:

• Deficiencies in early complement factors impair immune response, potentially due to defective immune complex processing.
• Complete C3 deficiency significantly increases susceptibility to infection and renal disease in affected animals.
• C6 deficiency studies implicate the MAC in inflammatory insults like reperfusion injury, glomerular damage, and xenograft rejection.

Conclusions:

• Naturally deficient animal models are invaluable tools for dissecting complement-mediated inflammation and infection.
• The terminal MAC plays a significant role in various inflammatory disease processes.
• Continued research in these models holds potential for developing novel therapeutic strategies for human diseases.