PD-1 and PD-L1 regulate cellular immunity in canine visceral leishmaniasis

• Autor(a) principal: Oliveira Silva, Kathlenn Liezbeth [UNESP]
• Data de Publicação: 2019
• Outros Autores: Marin Chiku, Vanessa [UNESP], Luvizotto Venturin, Gabriela [UNESP], Correa Leal, Aline Aparecida [UNESP], de Almeida, Breno Fernando [UNESP], De Rezende Eugenio, Flavia [UNESP], Dos Santos, Paulo Sergio Patto [UNESP], Fabrino Machado, Gisele [UNESP], De Lima, Valeria Marçal Felix [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.cimid.2018.12.002; http://hdl.handle.net/11449/188514
• topic: Canine; Cytokine; Lymphoproliferation; Nitric oxide; PD-1; Visceral leishmaniasis

PD-1 is a negative costimulator of chronic infectious diseases In this study, we investigated the expression of PD-1 and its ligands in the spleen of dogs with visceral leishmaniasis and lymphoproliferative response to soluble antigen, in lymph node cells in the presence or absence of antibodies blocking PD-1 and its ligands. Our results showed expression of PD-1 and its ligands is higher after L. infantum infection and in the spleen of infected dogs, PD-1 blockage was able to restore the antigen-dependent lymphoproliferative response and regulated production of the cytokines IL-4 and IL-10 and NO production. We concluded that L. infantum infection modulates PD-1 and its ligands expression in canine VL and that blockage of PD-1 restores the immune response. Thus, blockage of PD-1 is a target for therapeutic drug development.