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Laugier, Laurie; Ferreira, Ludmila Rodrigues Pinto; Ferreira, Frederico Moraes; Cabantous, Sandrine; Frade, Amanda Farage; Nunes, Joao Paulo; Ribeiro, Rafael Almeida; Brochet, Pauline; Teixeira, Priscila Camillo; Santos, Ronaldo Honorato Barros; Bocchi, Edimar A; Bacal, Fernando; Cândido, Darlan da Silva; Maso, Vanessa Escolano; Nakaya, Helder I; Kalil, Jorge; Cunha-Neto, Edecio; Chevillard, Christophe
PLoS neglected tropical diseases, 12/2020, Letnik: 14, Številka: 12Journal Article
Chronic Chagas disease cardiomyopathy (CCC), an especially aggressive inflammatory dilated cardiomyopathy caused by lifelong infection with the protozoan Trypanosoma cruzi, is a major cause of cardiomyopathy in Latin America. Although chronic myocarditis may play a major pathogenetic role, little is known about the molecular mechanisms responsible for its severity. The aim of this study is to study the genes and microRNAs expression in tissues and their connections in regards to the pathobiological processes. To do so, we integrated for the first time global microRNA and mRNA expression profiling from myocardial tissue of CCC patients employing pathways and network analyses. We observed an enrichment in biological processes and pathways associated with the immune response and metabolism. IFNγ, TNF and NFkB were the top upstream regulators. The intersections between differentially expressed microRNAs and differentially expressed target mRNAs showed an enrichment in biological processes such as Inflammation, inflammation, Th1/IFN-γ-inducible genes, fibrosis, hypertrophy, and mitochondrial/oxidative stress/antioxidant response. MicroRNAs also played a role in the regulation of gene expression involved in the key cardiomyopathy-related processes fibrosis, hypertrophy, myocarditis and arrhythmia. Significantly, a discrete number of differentially expressed microRNAs targeted a high number of differentially expressed mRNAs (>20) in multiple processes. Our results suggest that miRNAs orchestrate expression of multiple genes in the major pathophysiological processes in CCC heart tissue. This may have a bearing on pathogenesis, biomarkers and therapy.
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in: SICRIS
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