Humoral and cellular immune responses in BALB/c and C57BL/6 mice immunized with cytoplasmic (CRA) and flagellar (FRA) recombinant repetitive antigens, in acute experimental Trypanosoma cruzi in

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• 作者：Val¨¦ria R. A. Pereira ; Virginia M. B. Lorena ; Mineo Nakazawa ; Carlos F. Luna ; Edimilson D. Silva ; Antonio G. P. Ferreira ; Marco Aur¨¦lio Krieger ; Samuel Goldenberg ; Milena B. P. Soares and Eridan M. Coutinho ; et al.
• 刊名：Parasitology Research
• 出版年：2005
• 出版时间：June 2005
• 年：2005
• 卷：96
• 期：3
• 页码：154-161
• 全文大小：277 KB

文摘

In previous studies, cytoplasmic repetitive antigen (CRA) and flagellar repetitive antigen (FRA) proteins induced specific humoral and cellular immune responses in susceptible and resistant mice in the absence of Trypanosoma cruzi infection with a significant induction of the Interferon-gamma (IFN-) production in those animals. In this follow-up paper, the immunostimulatory and protective effects of these proteins were evaluated by immunizing with CRA or FRA antigens, BALB/c and C57BL/6 mice and challenging with a T. cruzi (Y strain). Both proteins induced humoral response with high levels of IgG isotypes as well as cellular immunity with high levels of IFN- when compared to controls. However, the lymphocyte proliferative response was minimal. The survival rate at 30 days post-infection was significant in CRA (60 % ) or FRA (50 % ) - immunized BALB/c mice and CRA (83.3 % ) - immunized C57BL/6 mice. Taken as a whole these findings indicate that CRA and FRA are immunogenic and potentially important for protective immunity.