Increased frequencies of circulating CCR5+ memory T cells are correlated to chronic chagasic cardiomyopathy progression.

Increased frequencies of circulating CCR5+ memory T cells are correlated to chronic chagasic cardiomyopathy progression. J Leukoc Biol. 2019 May 14;: Authors: Roffe E, Dos Santos LI, Santos MO, Henriques PM, Teixeira-Carvalho A, Martins-Filho OA, Rocha MOC, Eloi-Santos SM, Correa-Oliveira R, Antonelli LRV Abstract The infection with the protozoan parasite Trypanosoma cruzi causes Chagas disease, a neglected tropical disease in Latin America and an imported emerging disease worldwide. Chronic Chagasic cardiomyopathy (CCC), a progressive inflammatory and fibrosing disease, is the most prominent clinical form of Chagas disease, culminating in heart failure and high rates of sudden death. CCC pathogenesis is influenced by both host and parasite factors and is proposed to be mostly immune-driven. Chemokines are crucial players in orchestrating immune cell recruitment to infected tissues and inflammation. Herein, we investigated inflammatory chemokine receptor expression on circulating T cells in patients stratified by CCC severity. Compared to asymptomatic individuals, we found increased percentages of effector CD4+ T cells and central memory CD4+ and CD8+ T cells expressing CCR5 in patients with structural cardiopathy, but normal global ventricular function and no symptoms of chronic heart failure. Even naïve T cells expressed CCR5 in these patients. In contrast, reduced frequencies of CD4+ and CD8+ effector T cells expressing CXCR3 were observed i...
Source: Journal of Leukocyte Biology - Category: Hematology Authors: Tags: J Leukoc Biol Source Type: research

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Conclusions: We suggest some distinct molecular mechanisms for production of IL-1β in innate immune cells from patients with different clinical forms of Chagas disease. MMP-2 and MMP-9 gelatinases are associated with distinct disease outcomes and IL-1β production. Introduction Chagas disease, also known as American trypanosomiasis, is a neglected parasitic disease caused by the protozoan Trypanosoma cruzi (1), that affects millions of people in the world (2). During the acute phase, a diffuse and intense inflammation in the cardiomyocytes is observed, which is composed mainly of neutrophils, monocytes, and ...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
ABSTRACT Chagas disease results from infection by the protozoan parasite Trypanosoma cruzi and is endemic in Latin America. T cruzi is most commonly transmitted through the feces of an infected triatomine, but can also be congenital, via contaminated blood transfusion or through direct oral contact. In the acute phase, the disease can cause cardiac derangements such as myocarditis, conduction system abnormalities, and/or pericarditis. If left untreated, the disease advances to the chronic phase. Up to oneā€half of these patients will develop a cardiomyopathy, which can lead to cardiac failure and/or ventricular arrhythmia...
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