O papel da caspase-8 na malária cerebral experimental

• Ano de defesa: 2021
• Autor(a) principal: Larissa Marina Nogueira Pereira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; ICB - DEPARTAMENTO DE BIOQUÍMICA E IMUNOLOGIA; Programa de Pós-Graduação em Bioquímica e Imunologia; UFMG
• Palavras-chave em Português: Malária; Inflamassoma; Caspase-8; IL-1β; TNFα; Bioquímica e imunologia; Caspase 8; Interleucina-1 beta; Fator de Necrose Tumoral alfa; Inflamassomos
• Link de acesso: http://hdl.handle.net/1843/41397

Malaria is a disease caused by Plasmodium spp. parasites which affects millions of people every year. Exacerbated immune response by the host triggers a large production of inflammatory cytokines such as IL-1β and TNFα, contributing to the symptoms of the disease. During mouse malaria, although there is caspase-11 activation, the non-canonical pathway of inflammasome does not seem to contribute to the pathogenesis of the disease, whereas caspase-1 plays an important role on IL-1β production. Caspase-8 is cleaved in splenic monocytes from infected mice and caspase-8 participates in IL-1β and TNFα production. Moreover, Ripk3/Casp8-/- mice are partially resistant to infection followed by LPS challenge and experimental cerebral malaria and Ripk3/Casp8/1/11-/- e Ripk3/Casp8/Gsdmd-/- mice highly resistant in both models. These results demonstrate a complementary, but independent, role of caspase-8 and inflammasomes in mediating malaria pathogenesis. Besides, P. vivax and P. falciparum infected patients display active GSDMD, caspase-4 and caspase-8 in monocytes. In conclusion, the present work suggests the importance of caspase-8 during malaria and its potential role as a possible therapeutical target.