Chronic cardiomyopathy is one of the most relevant outcomes of Chagas disease associated with parasite persistence and exacerbated inflammatory response. Fenofibrate, a third generation fibric acid derivative and peroxisome proliferator-activated receptor-α ligand, is involved in the regulation of inflammatory response. However, the participation of macrophages in this scenario has not been elucidated. Here we show, for the first time, that macrophages play a fundamental role in the fenofibrate-mediated modulation of heart pro-inflammatory response and fibrosis caused by the infection with . Furthermore, macrophages are required for fenofibrate to improve the loss of ventricular function and this restoration correlates with an anti-inflammatory microenvironment. Understanding the contributions of macrophages to the healing properties of fenofibrate reinforces its potential use as a therapeutic drug, with the aim of helping to solve a public health problem, such as chronic Chagas disease.
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