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Title: Reaching for the Holy Grail: insights from infection/cure models on the prospects for vaccines for Trypanosoma cruzi infection
Author: Bustamante, Juan
Tarleton, Rick
Keywords: Malaltia de Chagas
Chagas disease
Issue Date: 28-Apr-2015
Publisher: Instituto Oswaldo Cruz
Abstract: Prevention of Trypanosoma cruzi infection in mammals likely depends on either prevention of the invading trypomastigotes from infecting host cells or the rapid recognition and killing of the newly infected cells by T. cruzi-specific T cells. We show here that multiple rounds of infection and cure (by drug therapy) fails to protect mice from reinfection, despite the generation of potent T cell responses. This disappointing result is similar to that obtained with many other vaccine protocols used in attempts to protect animals from T. cruzi infection. We have previously shown that immune recognition of T. cruzi infection is significantly delayed both at the systemic level and at the level of the infected host cell. The systemic delay appears to be the result of a stealth infection process that fails to trigger substantial innate recognition mechanisms while the delay at the cellular level is related to the immunodominance of highly variable gene family proteins, in particular those of the trans-sialidase family. Here we discuss how these previous studies and the new findings herein impact our thoughts on the potential of prophylactic vaccination to serve a productive role in the prevention of T. cruzi infection and Chagas disease.
Note: Versió postprint del document publicat a:
It is part of: Memorias do Instituto Oswaldo Cruz, 2015, vol. 110, num. 3, p. 445-451
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ISSN: 0074-0276
Appears in Collections:Articles publicats en revistes (ISGlobal)

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