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Complement component 3 as biomarker of disease activity and cardiometabolic risk factor in rheumatoid arthritis and
Iván Arias de la Rosa1, Pilar Font1, Alejandro Escudero-Contreras2
1Medicine Department, University of Cordoba, Maimonides Institute for Research in Biomedicine of Cordoba (IMIBIC), Reina Sofia University Hospital, Cordoba, Spain.
Insights
Complement component 3 (C3) is linked to increased cardiometabolic risks in rheumatoid arthritis and spondyloarthritis. Elevated C3 levels indicate higher disease activity and insulin resistance in these conditions.
Area of Science:
- Rheumatology and Immunology
- Cardiovascular Medicine
- Metabolic Syndrome
Background:
- Rheumatic diseases like rheumatoid arthritis (RA), psoriatic arthritis (PsA), and axial spondyloarthritis (axSpA) are associated with high cardiovascular morbidity and mortality.
- Understanding the factors contributing to cardiovascular risk in these inflammatory conditions is crucial for patient management.
Purpose of the Study:
- To investigate the association between complement component 3 (C3) levels and cardiometabolic risk factors.
- To explore the relationship between C3 and disease activity in RA, PsA, and axSpA patients.
Main Methods:
- A cross-sectional study involving 200 RA, 80 PsA, 150 axSpA patients, and 100 healthy controls.
- Analysis of cardiometabolic risk factors, serum C3 levels, and inflammatory markers.
- Phenotypic classification using cluster analysis and biomarker accuracy assessment via ROC curve analysis.
Main Results:
- Significantly elevated C3 levels were observed in RA, axSpA, and PsA patients.
- Higher C3 levels correlated with an increased prevalence of cardiometabolic risk factors and higher disease activity.
- Complement C3 levels effectively identified insulin-resistant patients, independent of obesity.
Conclusions:
- Complement C3 is associated with increased cardiometabolic risk factors in RA and spondyloarthritis.
- C3 serves as a valuable biomarker for assessing insulin resistance and disease activity in these rheumatic diseases.
Objective:
To analyze the relationship between complement component 3 (C3) and the prevalence of cardiometabolic risk factors and disease activity in the rheumatic diseases having the highest rates of cardiovascular morbidity and mortality: rheumatoid arthritis (RA), psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA).
Methods:
This is a cross-sectional study including 200 RA, 80 PsA, 150 axSpA patients and 100 healthy donors. The prevalence of cardiometabolic risk factors [obesity, insulin resistance, type 2 diabetes mellitus, hyperlipidemia, apolipoprotein B/apolipoprotein A (apoB/apoA) and atherogenic risks and hypertension] was analyzed. Serum complement C3 levels, inflammatory markers and disease activity were evaluated. Cluster analysis was performed to identify different phenotypes. Receiver operating characteristic (ROC) curve analysis to assess the accuracy of complement C3 as biomarker of insulin resistance and disease activity was carried out.
Results:
Levels of complement C3, significantly elevated in RA, axSpA and PsA patients, were associated with the prevalence of cardiometabolic risk factors. Hard clustering analysis identified two distinctive phenotypes of patients depending on the complement C3 levels and insulin sensitivity state. Patients from cluster 1, characterized by high levels of complement C3 displayed increased prevalence of cardiometabolic risk factors and high disease activity. ROC curve analysis showed that non-obesity related complement C3 levels allowed to identify insulin resistant patients.
Conclusions:
Complement C3 is associated with the concomitant increased prevalence of cardiometabolic risk factors in rheumatoid arthritis and spondyloarthritis. Thus, complement C3 should be considered a useful marker of insulin resistance and disease activity in these rheumatic disorders.
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