Characterization of T cell activation and regulation in children with asymptomatic Plasmodium falciparum infection

Malaria Journal
Augustina FrimpongWilfred Ndifon

Abstract

Asymptomatic Plasmodium infections are characterized by the absence of clinical disease and the ability to restrict parasite replication. Increasing levels of regulatory T cells (Tregs) in Plasmodium falciparum infections have been associated with the risk of developing clinical disease, suggesting that individuals with asymptomatic infections may have reduced Treg frequency. However, the relationship between Tregs, cellular activation and parasite control in asymptomatic malaria remains unclear. In a cross-sectional study, the levels of Tregs and other T cell activation phenotypes were compared using flow cytometry in symptomatic, asymptomatic and uninfected children before and after stimulation with infected red blood cell lysates (iRBCs). In addition, the association between these T cell phenotypes and parasitaemia were investigated. In children with asymptomatic infections, levels of Tregs and activated T cells were comparable to those in healthy controls but significantly lower than those in symptomatic children. After iRBC stimulation, levels of Tregs remained lower for asymptomatic versus symptomatic children. In contrast, levels of activated T cells were higher for asymptomatic children. Strikingly, the pre-stimulation ...Continue Reading

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Citations

Dec 18, 2018·Frontiers in Immunology·Augustina FrimpongWilfred Ndifon
Jul 19, 2019·Frontiers in Immunology·Augustina FrimpongWilfred Ndifon
Jan 11, 2020·Frontiers in Immunology·Lea-Christina KaminskiMaria Sophia Mackroth
Nov 5, 2019·Frontiers in Immunology·Kelvin M KimenyiLynette Isabella Ochola-Oyier
Dec 8, 2020·Frontiers in Microbiology·Augustina FrimpongKwadwo Asamoah Kusi
Apr 2, 2021·Probiotics and Antimicrobial Proteins·Timothy BamgboseJosé de la Fuente

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Methods Mentioned

BETA
flow cytometry

Software Mentioned

R Foundation
Flowjo
GraphPad
R
GraphPad Prism

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