ArticleBMC infectious diseases2015
Phenotypic profiling of CD8(+) T cells during Plasmodium vivax blood-stage infection.
Article in BMC infectious diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
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Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.
- Association between RANTES/CCL5 levels with Plasmodium infections and malaria severity: a systematic review.Malaria journal · 2024Pooled it
- Cellular Immune Response and T Cell Epitope Mapping ofVaccines · 2026Article
- Immune Modulation by Plasmodium yoelii: Insights From Lethal and Non-Lethal Strains.Parasite immunology · 2026Review
- Parasite genotypes and host immune mediators in primary and recurrent episodes of vivax Malaria in Colombia.Revista peruana de medicina experimental y salud publica · 2025Article
- Resolution of experimental malaria-associated acute respiratory distress syndrome is Alox12 independent and shows residual inflammation.Malaria journal · 2025Article
- Immunological characterization of a VIR protein family member (VIR-14) in Plasmodium vivax-infected subjects from different epidemiological regions in Africa and South America.PLoS neglected tropical diseases · 2023Article
- Blood Levels of Galectin-9, an Immuno-Regulating Molecule, Reflect the Severity for the Acute and Chronic Infectious Diseases.Biomolecules · 2021Review
- Comparison of leucocyte profiles between healthy children and those with asymptomatic and symptomatic Plasmodium falciparum infections.Malaria journal · 2020Article
- Cytotoxic CD8Nature medicine · 2018Article
- On the cytokine/chemokine network during Plasmodium vivax malaria: new insights to understand the disease.Malaria journal · 2017Article
- The Deubiquitinating Enzyme Cylindromatosis Dampens CD8Frontiers in immunology · 2017Article
- Immune response pattern in recurrent Plasmodium vivax malaria.Malaria journal · 2016Article
- Plasma levels of Galectin-9 reflect disease severity in malaria infection.Malaria journal · 2016Article
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Authors and funding
10 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundFor a long time, the role of CD8(+) T cells in blood-stage malaria was not considered important because erythrocytes do not express major histocompatibility complex (MHC) class I proteins. While recent evidences suggest that CD8(+) T cells may play an important role during the erythrocytic phase of infection by eliminating parasites, CD8(+) T cells might also contribute to modulate the host response through production of regulatory cytokines. Thus, the role of CD8(+) T cells during blood-stage malaria is unclear. Here, we report the phenotypic profiling of CD8(+) T cells subsets from patients with uncomplicated symptomatic P. vivax malaria.
methodsBlood samples were collected from 20 Plasmodium vivax-infected individuals and 12 healthy individuals. Immunophenotyping was conducted by flow cytometry. Plasma levels of IFN-γ, TNF-α and IL-10 were determined by ELISA/CBA. Unpaired t-test or Mann-Whitney test was used depending on the data distribution.
resultsP. vivax-infected subjects had lower percentages and absolute numbers of CD8(+)CD45RA(+) and CD8(+)CD45RO(+) T cells when compared to uninfected individuals (p ≤ 0.0002). A significantly lower absolute number of circulating CD8(+)CD45(+)CCR7(+) cells (p = 0.002) was observed in P. vivax-infected individuals indicating that infection reduces the number of central memory T cells. Cytokine expression was significantly reduced in the naïve T cells from infected individuals compared with negative controls, as shown by lower numbers of IFN-γ(+) (p = 0.001), TNF-α(+) (p < 0.0001) and IL-10(+) (p < 0.0001) CD8(+) T cells. Despite the reduction in the number of CD8(+) memory T cells producing IFN-γ (p < 0.0001), P. vivax-infected individuals demonstrated a significant increase in memory CD8(+)TNF-α(+) (p = 0.016) and CD8(+)IL-10(+) (p = 0.004) cells. Positive correlations were observed between absolute numbers of CD8(+)IL-10(+) and numbers of CD8(+)IFN-γ(+) (p < 0.001) and CD8(+)TNF-α(+) T cells (p ≤ 0.0001). Finally, an increase in the plasma levels of TNF-α (p = 0.017) and IL-10 (p = 0.006) and a decrease in the IFN-γ plasma level (p <0.0001) were observed in the P. vivax-infected individuals.
conclusionsP. vivax infection reduces the numbers of different subsets of CD8(+) T cells, particularly the memory cells, during blood-stage of infection and enhances the number of CD8(+) memory T cells expressing IL-10, which positively correlates with the number of cells expressing TNF-α and IFN-γ.
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