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Transcriptomic Signatures of Alterations in a Myoblast Cell Line Infected with Four Distinct Strains of Trypanosoma cruzi

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  • Laboratorio de Ultra-estrutura Celular, Instituto Oswaldo Cruz–Fiocruz, Rio de Janeiro, Brazil; Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York
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We examined the extent to which different Trypanosoma cruzi strains induce transcriptomic changes in cultured L6E9 myoblasts 72 hours after infection with Brazil (TC I), Y (TC II), CL (TC II), and Tulahuen (TC II) strains. Expression of 6,289 distinct, fully annotated unigenes was quantified with 27,000 rat oligonucleotide arrays in each of the four replicas of all control and infected RNA samples. Considering changes greater than 1.5-fold and P values < 0.05, the Tulahuen strain was the most disruptive to host transcriptome (17% significantly altered genes), whereas the Y strain altered only 6% of the genes. The significantly altered genes in the infected cells were largely different among the strains, and only 21 genes were similarly changed by all four strains. However, myoblasts infected with different strains showed proportional overall gene-expression alterations. These results indicate that infection with different parasite strains modulates similar but not identical pathways in the host cells.

Author Notes

*Address correspondence to Daniel Adesse, Avenida Brasil 4365, Pavilhão Carlos Chagas, Rio de Janeiro, Rio de Janeiro, Brazil. E-mail: adesse@ioc.fiocruz.br

Authors' addresses: Daniel Adesse, Luciana Ribeiro Garzoni, and Maria de Nazareth Meirelles, Laboratório de Ultraestrutura Celular, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil. Dumitru A. Iacobas, Sanda Iacobas, and David C. Spray, Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY. Herbert B. Tanowitz, Department of Pathology, Albert Einstein College of Medicine, Bronx, NY.

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