Caracterização do padrão de Quimiocinas em diferentes formas clínicas da doença de chagas

Abstract

Chemokines act in the recruitment and accumulation of leukocytes during the inflammatory process and play an important role in the development of the different clinical forms of Chagas’ disease. The aim of this study was to evaluate the expression of chemokines and chemokine receptors in patients with the different clinical forms of this disease. The mRNA quantification of chemokines (CCL1, CCL2, CCL3, CCL4, CCL5, CCL17, CCL22, CCL24, CCL27, CCL28, CXCL9, CXCL10) and chemokine receptors (CCR2, CCR3, CCR4, CCR5, CCR6, CCR7, CCR8, CCR10, CXCR3) in patients with indeterminated form (n=18), cardiac form (n=17), digestive form (n=15) and cardiodigestive form (n=15) was performed in peripheral-blood mononuclear cells (PBMC) by real-time PCR. Patients with the cardiac form displayed higher mRNA expression of CXCL9, CXCL10, CXCR3 and CCR5, than patients with indeterminate form. On the other hand, patients with the digestive form showed high transcript expression of CCR3, when compared to patients with indeterminate and cardiac clinical forms of the disease. In addition there was positive correlation beteween CCR3 mRNA expression and sigmoid dimension. The relative expression of CCL5 was higher in cardiodigestive patients compared to those with the cardiac and indeterminate forms. CXCL9, CXCL10, CXCR3 and CCR5 participate in the migration of Th1-profile cells and the high expression in patients with chagasic cardiomyopathy indicates their contribution in the cardiac inflammatory process. Patients with digestive form showed high of CCR3 mRNA expression which is involved with Th2 immune profile, indicating possible polarization for this profile in development of digestive form of disease. The involvement of chemokines and chemokine receptors in different clinical forms of Chagas’ disease may provide a better understanding of the mechanism of disease pathogenesis.