Recombinant cysteine proteinase from Leishmania (Leishmania) chagasi implicated in human and dog T-cell responses

Paulo Henrique da Costa Pinheiro1, Suzana de Souza Dias, Kelsen Dantas Eulálio

  • 1Division of Parasitology, Universidade Federal de São Paulo, Escola Paulista de Medicina, Rua Botucatu, 862-6o andar, São Paulo, SP, Brazil 04023-062.

High in vitro lymphoproliferative responses were induced in humans and dogs by a recombinant Leishmania (Leishmania) chagasi cysteine proteinase, with secretion of IFN-gamma in asymptomatic subjects or of IFN-gamma, interleukin 4 (IL-4), and IL-10 in oligosymptomatic subjects. In contrast, responses of symptomatic patients and dogs were lower, with production of IL-4 and IL-10.