Caspase-8 mediates inflammation and disease in rodent malaria

Nat Commun. 2020 Sep 14;11(1):4596. doi: 10.1038/s41467-020-18295-x.

Abstract

Earlier studies indicate that either the canonical or non-canonical pathways of inflammasome activation have a limited role on malaria pathogenesis. Here, we report that caspase-8 is a central mediator of systemic inflammation, septic shock in the Plasmodium chabaudi-infected mice and the P. berghei-induced experimental cerebral malaria (ECM). Importantly, our results indicate that the combined deficiencies of caspases-8/1/11 or caspase-8/gasdermin-D (GSDM-D) renders mice impaired to produce both TNFα and IL-1β and highly resistant to lethality in these models, disclosing a complementary, but independent role of caspase-8 and caspases-1/11/GSDM-D in the pathogenesis of malaria. Further, we find that monocytes from malaria patients express active caspases-1, -4 and -8 suggesting that these inflammatory caspases may also play a role in the pathogenesis of human disease.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Brain / pathology
  • Caspase 1 / metabolism
  • Caspase 8 / metabolism*
  • Dendritic Cells / metabolism
  • Enzyme Activation
  • Extracellular Matrix / metabolism
  • Gene Expression Regulation
  • Humans
  • Inflammation / pathology*
  • Interferon-gamma / metabolism
  • Interleukin-1beta / metabolism
  • Lipopolysaccharides
  • Malaria, Cerebral / enzymology*
  • Malaria, Cerebral / genetics
  • Mice, Inbred C57BL
  • Monocytes / metabolism
  • Plasmodium chabaudi / physiology
  • Spleen / metabolism
  • Toll-Like Receptors / metabolism

Substances

  • Interleukin-1beta
  • Lipopolysaccharides
  • Toll-Like Receptors
  • Interferon-gamma
  • Caspase 8
  • Caspase 1

Associated data

  • figshare/10.6084/m9.figshare.12751163.v1