Low Doses of Simvastatin Therapy Ameliorate Cardiac Inflammatory Remodeling in Trypanosoma cruzi-Infected Dogs

Lilian Melo Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Ivo Santana Caldas Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Maíra Araújo Azevedo Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Karolina Ribeiro Gonçalves Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Alvaro Fernando da Silva do Nascimento Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Vivian Paulino Figueiredo Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Lívia de Figueiredo Diniz Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Wanderson Geraldo de Lima Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Rosália Moraes Torres Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Maria Terezinha Bahia Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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André Talvani Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

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Chagas cardiomyopathy remodeling is based on the presence of Trypanosoma cruzi in heart tissue and on the complex inflammatory response leading to a myocardium fibrosis and alterations in conductive and functional heart parameters. This study aims to evaluate Simvastatin on the inflammatory response and heart functionality using dogs infected with Y strain of T. cruzi. Animals were treated daily with Simvastatin (20 mg) for 6 months and submitted to clinical and immunopathological evaluations. Simvastatin reduced heart expression and serum levels of interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α) but not interleukin-10 (IL-10), possibly favoring blood parasitism but reducing inflammation and fibrosis in the left ventricle and right atrium. Simvastatin also ameliorated ejection fraction, diastolic diameter, and mass index of the left ventricle 6 months after infection. This study suggests that more investigation should be performed on the use of statins as a prophylactic therapy against cardiac remodeling because of their effects on modifying immune response and benefiting functional parameters in dogs with T. cruzi-induced ventricular dysfunctions.

Author Notes

*Address correspondence to André Talvani, Laboratório de doença de Chagas, DECBI /NUPEB Universidade Federal de Ouro Preto ICEB II, Campus Morro do Cruzeiro 35400-000, Ouro Preto, MG, Brazil. E-mail: talvani@nupeb.ufop.br

Authors' addresses: Lilian Melo, Ivo Santana Caldas, Maíra Araújo Azevedo, Vivian Paulino Figueiredo, Lívia de Figueiredo Diniz, Wanderson Geraldo de Lima, Maria Terezinha Bahia, and André Talvani, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil, E-mails: lilianmel@yahoo.com.br, ivocaldass@yahoo.com.br, mairaaazevedo@hotmail.com, vivian_figueiredo@yahoo.com.br, liviafcd@yahoo.com.br, wanderson@ufop.br, mtbahia@nupeb.ufop.br, and talvani@nupeb.ufop.br. Karolina Ribeiro Gonçalves, Alvaro Fernando da Silva do Nascimento, Wanderson Geraldo de Lima, and Maria Terezinha Bahia, Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil, E-mails: krgbio@gmail.com, neto1988@gmail.com, wanderson@ufop.br, and mtbahia@nupeb.ufop.br. Rosália Moraes Torres, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, E-mail: rmtorres@medicina.ufmg.br.

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