Journal
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
Volume 80, Issue 5, Pages 718-722Publisher
AMER SOC TROP MED & HYGIENE
DOI: 10.4269/ajtmh.2009.80.718
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Funding
- Canadian Institutes of Health Research (CIHR)Team Grant in Malaria (KCK)
- CIHR [MT-13721]
- Genome Canada through the Ontario Genomics Institute (KCK)
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Research relating to host inflammatory processes during malaria infection has focused on Toll-like receptors, membrane-bound receptors implicated in innate sensing, and phagocytosis of parasitized erythrocytes by host cells. This is the first study to examine the role of Nod proteins, members of the Nod-like receptor (NLR) family of cytoplasmic proteins involved in pathogen recognition, in a murine model of cerebral malaria (Plasmodium berghei ANKA, PbA). Here, we find that nod1nod2(-/-) mice infected with PbA show no difference in survival or parasitemia compared with wild-type infected animals. However, cytokine levels, notably those associated with NLR activation including interleukin (IL)1-beta KC, and MCP-1, and proteins linked to malaria pathogenesis, such as interferon-gamma (IFN-gamma), were decreased in the nod1nod2(-/-) animals. We therefore demonstrate for the first time that Nod proteins are activated in response to parasites, and they play a role in regulating host inflammatory responses during malaria infection.
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