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 nod-1nod2(-/-) 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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Article Synopsis
- Malaria has surged in sub-Saharan Africa due to disruptions from the Covid-19 pandemic, leading to severe cases like cerebral malaria and acute kidney injury.
- A 22-year-old male from Chad, who presented with confusion and had a history of travel to an endemic area, was initially misdiagnosed but later confirmed to have malaria with severe symptoms.
- Successful treatment included intravenous artesunate and hemodialysis, and the patient was discharged after 20 days, highlighting the need for quick diagnosis and effective management of malaria complications.
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