Plasmodium falciparum Activates CD16+ Dendritic Cells to Produce Tumor Necrosis Factor and Interleukin-10 in Subpatent Malaria
Year: 2018
Type: article
Abstract: Background: The malaria causing parasite Plasmodium subverts host immune responses by several strategies including the modulation of dendritic cells (DCs). Methods: In this study, we show that Plasmodium falciparum skewed CD16+ DC cytokine responses towards interleukin (IL)-10 production in vitro, distinct to the cytokine profile induced by Toll-like receptor ligation. To determine CD16+ DC responsiveness in vivo, we assessed their function after induced P falciparum infection in malaria-naive volunteers. Results: CD16+ DCs underwent distinctive activation, with increased expression of maturation markers human leukocyte antigen (HLA)-DR and CD86, enhanced tumor necrosis factor (TNF) production, and coproduction of TNF/IL-10. In vitro restimulation with P falciparum further increased IL-10 production. In contrast, during naturally acquired malaria episode, CD16+ DCs showed diminished maturation, suggesting increased parasite burden and previous exposure influence DC subset function. Conclusions: These findings identify CD16+ DCs as the only DC subset activated during primary blood-stage human Plasmodium infection. As dual cytokine producers, CD16+ DCs contribute to inflammatory as well as regulatory innate immune processes.
Language: English
Topic: Malaria Research and Control
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $2,880
Awards: Dendritic cell dysfunction and apoptosis in malaria, Identifying T cell correlates of protective immunity to malaria in childhood, Pathophysiology and treatment of malaria in our region, T-follicular helper cell subtypes that induce protective anti-malaria antibodies, G4998995227, Improving the treatment of Plasmodium vivax, Tropical Disease - immunity, pathogenesis and vaccine development: global translation, Improving the treatment of Plasmodium vivax
OpenAlex ID: W2914178621