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The effect of memantine, an antagonist of the NMDA glutamate receptor, in in vitro and in vivo infections by Trypanosoma cruzi.
Santos Souza, Higo Fernando; Rocha, Sandra Carla; Damasceno, Flávia Silva; Rapado, Ludmila Nakamura; Pral, Elisabeth Mieko Furusho; Marinho, Claudio Romero Farias; Silber, Ariel Mariano.
Afiliación
  • Santos Souza HF; Laboratory of Biochemistry of Tryps-LaBTryps, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
  • Rocha SC; Laboratory of Biochemistry of Tryps-LaBTryps, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
  • Damasceno FS; Laboratory of Biochemistry of Tryps-LaBTryps, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
  • Rapado LN; Laboratory of Biochemistry of Tryps-LaBTryps, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
  • Pral EMF; Laboratory of Biochemistry of Tryps-LaBTryps, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
  • Marinho CRF; Laboratory of Experimental Immunoparasitology, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
  • Silber AM; Laboratory of Biochemistry of Tryps-LaBTryps, Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
PLoS Negl Trop Dis ; 13(9): e0007226, 2019 09.
Article en En | MEDLINE | ID: mdl-31536489
Chagas disease, caused by Trypanosoma cruzi, is a neglected tropical disease that affects 5-6 million people in endemic areas of the Americas. Presently, chemotherapy relies on two compounds that were proposed as trypanocidal drugs four decades ago: nifurtimox and benznidazole. Both drugs are able to eliminate parasitemia and to avoid seroconversion in infected people when used in the acute phase; however, their use in the chronic phase (the time when the majority of cases are diagnosed) is limited due to their serious side effects. Memantine is a glutamate receptor antagonist in the central nervous system of mammals that has been used for the treatment of Alzheimer's disease. Our group previously reported memantine as a trypanocidal drug that is able to induce apoptosis-like death in T. cruzi. In the present work, we further investigated the effects of memantine on the infection of RAW 264.7 macrophages and in vivo (in BALB/c mice). Here, we showed that memantine is able to diminish NO and Ca2+ entry in both LPS-activated and non-activated cells. These results, together with the fact that memantine was also able to reduce the infection of macrophages, led us to propose that this drug is able to activate a pro-oxidant non-NO-dependent cell defense mechanism. Finally, infected mice that were treated with memantine had diminished parasitemia, cardiac parasitic load, and inflammatory infiltrates. In addition, the treated mice had an increased survival rate. Taken together, these results indicate memantine to be a candidate drug for the treatment of Chagas disease.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tripanocidas / Trypanosoma cruzi / Memantina / Enfermedad de Chagas Límite: Animals Idioma: En Revista: PLoS Negl Trop Dis Asunto de la revista: MEDICINA TROPICAL Año: 2019 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tripanocidas / Trypanosoma cruzi / Memantina / Enfermedad de Chagas Límite: Animals Idioma: En Revista: PLoS Negl Trop Dis Asunto de la revista: MEDICINA TROPICAL Año: 2019 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos