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Dynamics of immunosuppression in hamsters with experimental visceral leishmaniasis BJMBR
Fazzani,C.; Guedes,P.A.; Senna,A.; Souza,E.B.; Goto,H.; Lindoso,J.A.L..
Immunosuppression has been reported to occur during active visceral leishmaniasis and some factors such as the cytokine profile may be involved in this process. In the mouse model of cutaneous leishmaniasis using Leishmania (Leishmania) major, the Th1 response is related to protection while the Th2 response is related to disease progression. However, in hamsters, which are considered to be an excellent model for the study of visceral leishmaniasis, this dichotomy is not observed. Using outbred 45- to 60-day-old (140 to 150 g) male hamsters infected intraperitoneally with 2 x 10(7) L. (L.) chagasi amastigotes, we evaluated the immune response of spleen cells and the production of cytokines. We used 3 to 7 hamsters per group evaluated. We detected a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Immunosuppression; Leishmania(Leishmania) chagasi; Hamster; Cytokine; T-cell proliferation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000700009
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Immunity and immunosuppression in experimental visceral leishmaniasis BJMBR
Goto,H.; Lindoso,J.A.L..
Leishmaniasis is a disease caused by protozoa of the genus Leishmania, and visceral leishmaniasis is a form in which the inner organs are affected. Since knowledge about immunity in experimental visceral leishmaniasis is poor, we present here a review on immunity and immunosuppression in experimental visceral leishmaniasis in mouse and hamster models. We show the complexity of the mechanisms involved and differences when compared with the cutaneous form of leishmaniasis. Resistance in visceral leishmaniasis involves both CD4+ and CD8+ T cells, and interleukin (IL)-2, interferon (IFN)- gamma, and IL-12, the latter in a mechanism independent of IFN- gamma and linked to transforming growth factor (TGF)-ß production. Susceptibility involves IL-10 but not IL-4,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Visceral leishmaniasis; Immunosuppression; T cell; Cytokines; Mice; Hamster.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400020
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