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Updated: Aug 13, 2026

Parasite Induced Genetically Driven Autoimmune Chagas Heart Disease in the Chicken Model
Published on: July 29, 2012
[C-reactive protein and interleukin-6 serum levels increase as Chagas disease progresses towards cardiac failure]
Lyankis López1, Kaduo Arai, Esther Giménez
1Asociación Cardiovascular Centro-Occidental (ASCARDIO), Escuela de Medicina, Universidad Centroccidental Lisandro Alvarado, Barquisimeto, Lara, Venezuela.
Insights
Interleukin-6 (IL-6) and C-reactive protein (CRP) serum levels correlate with Chagas disease progression. Elevated IL-6 is linked to disease stage, while CRP rises in advanced phases, indicating potential prognostic value for cardiac function.
Area of Science:
- Cardiology
- Immunology
- Infectious Diseases
Context:
- Chagas disease is a leading cause of myocarditis in Latin America.
- Chronic chagasic cardiomyopathy affects 25% of patients, leading to heart failure and arrhythmias.
- Serum biomarkers like C-reactive protein (CRP) and interleukin-6 (IL-6) have prognostic value in other cardiomyopathies.
Purpose:
- To investigate the relationship between serum CRP and IL-6 levels and the developmental stage of Chagas disease.
- To assess the potential of these biomarkers in predicting disease progression and cardiac function deterioration.
Summary:
- A study of 64 Chagas disease patients and 20 healthy controls measured serum CRP and IL-6 levels.
- Results showed a significant association between Chagas disease stage and IL-6 levels.
- CRP levels increased in the most advanced disease phase, and high IL-6 levels correlated with increased left ventricular mass index and male sex.
Impact:
- Serum IL-6 and CRP levels may serve as valuable prognostic indicators for Chagas disease progression.
- These biomarkers could aid in assessing cardiac function and guiding clinical management.
- Understanding these relationships can improve patient outcomes and disease monitoring.
Introduction And Objectives:
Chagas disease is the most common cause of myocarditis in Latin America, including Venezuela. Some 25% of patients progress to chronic chagasic cardiomyopathy, which is characterized by heart failure and arrhythmias. The serum levels of C-reactive protein (CRP) and interleukin-6 (IL-6) have prognostic value in non-chagasic cardiopathy. The goal of this study was to investigate the relationship between the serum levels of CRP and IL-6 and the developmental stage of Chagas disease.
Patients And Method:
The study included 64 Chagas disease patients (34 female and 30 male; age 62.2 [1.7] years) and 20 healthy individuals (10 of each sex; age 50.4 [2.7] years). Clinical investigations included echocardiography and measurement of CRP and IL-6 serum levels using ELISAs. Chagas disease patients were graded according to Carrasco et al 1994 classification. Patients with ischemic cardiopathy, liver disease, autoimmune disease, a systemic inflammatory condition, immunosuppression, cancer, pericarditis, or endocarditis were excluded.
Results:
Multiple regression analysis demonstrated an association between Chagas disease developmental stage and the serum IL-6 level. The serum CRP level increased during only the most advanced phase of the disease. In addition, a high left ventricular mass index was associated with a high IL-6 level and male sex.
Conclusions:
IL-6 and CRP serum levels could be of prognostic value in assessing Chagas disease progression because there are significant correlations between elevated levels and the deterioration of cardiac function.
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