Complement 3 and 4 impact in osteoarthritis

Area of Science:

• Rheumatology
• Immunology
• Biochemistry

Background:

• Osteoarthritis (OA) is a prevalent degenerative joint disease.
• Complement system proteins, C3 and C4, play roles in inflammation.
• Understanding their association with OA clinical features is crucial.

Purpose of the Study:

• To investigate the relationship between serum C3 and C4 levels and clinical characteristics in OA patients.
• To determine if C3 and C4 can serve as biomarkers for OA disease activity.

Main Methods:

• Retrospective analysis of 361 OA patients.
• Clinical data and serum levels of C3, C4, ESR, and CRP were collected.
• Statistical analyses included non-parametric tests, Spearman correlation, and multivariate regression.

Main Results:

• Lower C3, C4, ESR, and CRP levels were observed in the osteoarthritis group compared to controls.
• Serum C3 levels positively correlated with ESR and CRP.
• Serum C4 levels correlated with ESR, CRP, and the number of affected joints.

Conclusions:

• Serum C4 levels are significant indicators of OA disease activity, reflecting joint involvement and CRP levels.
• Serum C3 levels did not show a significant association with OA disease activity.
• C4 may hold potential as a predictive biomarker for OA activity.