Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection.
Clinical illness with Plasmodium falciparum or Plasmodium vivax compromises the function of dendritic cells (DC) and expands regulatory T (Treg) cells. Individuals with asymptomatic parasitemia have clinical immunity, restricting parasite expansion and preventing clinical disease. The role of DC and...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Society for Microbiology
2015
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| _version_ | 1797052509450141696 |
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| author | Kho, S Marfurt, J Noviyanti, R Kusuma, A Piera, K Burdam, F Kenangalem, E Lampah, D Engwerda, C Poespoprodjo, J Price, R Anstey, N Minigo, G Woodberry, T |
| author_facet | Kho, S Marfurt, J Noviyanti, R Kusuma, A Piera, K Burdam, F Kenangalem, E Lampah, D Engwerda, C Poespoprodjo, J Price, R Anstey, N Minigo, G Woodberry, T |
| author_sort | Kho, S |
| collection | OXFORD |
| description | Clinical illness with Plasmodium falciparum or Plasmodium vivax compromises the function of dendritic cells (DC) and expands regulatory T (Treg) cells. Individuals with asymptomatic parasitemia have clinical immunity, restricting parasite expansion and preventing clinical disease. The role of DC and Treg cells during asymptomatic Plasmodium infection is unclear. During a cross-sectional household survey in Papua, Indonesia, we examined the number and activation of blood plasmacytoid DC (pDC), CD141(+), and CD1c(+) myeloid DC (mDC) subsets and Treg cells using flow cytometry in 168 afebrile children (of whom 15 had P. falciparum and 36 had P. vivax infections) and 162 afebrile adults (of whom 20 had P. falciparum and 20 had P. vivax infections), alongside samples from 16 patients hospitalized with uncomplicated malaria. Unlike DC from malaria patients, DC from children and adults with asymptomatic, microscopy-positive P. vivax or P. falciparum infection increased or retained HLA-DR expression. Treg cells in asymptomatic adults and children exhibited reduced activation, suggesting increased immune responsiveness. The pDC and mDC subsets varied according to clinical immunity (asymptomatic or symptomatic Plasmodium infection) and, in asymptomatic infection, according to host age and parasite species. In conclusion, active control of asymptomatic infection was associated with and likely contingent upon functional DC and reduced Treg cell activation. |
| first_indexed | 2024-03-06T18:32:35Z |
| format | Journal article |
| id | oxford-uuid:0a2a5350-9019-4894-a75e-71c0b599326a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:32:35Z |
| publishDate | 2015 |
| publisher | American Society for Microbiology |
| record_format | dspace |
| spelling | oxford-uuid:0a2a5350-9019-4894-a75e-71c0b599326a2022-03-26T09:22:23ZPreserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0a2a5350-9019-4894-a75e-71c0b599326aEnglishSymplectic Elements at OxfordAmerican Society for Microbiology2015Kho, SMarfurt, JNoviyanti, RKusuma, APiera, KBurdam, FKenangalem, ELampah, DEngwerda, CPoespoprodjo, JPrice, RAnstey, NMinigo, GWoodberry, TClinical illness with Plasmodium falciparum or Plasmodium vivax compromises the function of dendritic cells (DC) and expands regulatory T (Treg) cells. Individuals with asymptomatic parasitemia have clinical immunity, restricting parasite expansion and preventing clinical disease. The role of DC and Treg cells during asymptomatic Plasmodium infection is unclear. During a cross-sectional household survey in Papua, Indonesia, we examined the number and activation of blood plasmacytoid DC (pDC), CD141(+), and CD1c(+) myeloid DC (mDC) subsets and Treg cells using flow cytometry in 168 afebrile children (of whom 15 had P. falciparum and 36 had P. vivax infections) and 162 afebrile adults (of whom 20 had P. falciparum and 20 had P. vivax infections), alongside samples from 16 patients hospitalized with uncomplicated malaria. Unlike DC from malaria patients, DC from children and adults with asymptomatic, microscopy-positive P. vivax or P. falciparum infection increased or retained HLA-DR expression. Treg cells in asymptomatic adults and children exhibited reduced activation, suggesting increased immune responsiveness. The pDC and mDC subsets varied according to clinical immunity (asymptomatic or symptomatic Plasmodium infection) and, in asymptomatic infection, according to host age and parasite species. In conclusion, active control of asymptomatic infection was associated with and likely contingent upon functional DC and reduced Treg cell activation. |
| spellingShingle | Kho, S Marfurt, J Noviyanti, R Kusuma, A Piera, K Burdam, F Kenangalem, E Lampah, D Engwerda, C Poespoprodjo, J Price, R Anstey, N Minigo, G Woodberry, T Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection. |
| title | Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection. |
| title_full | Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection. |
| title_fullStr | Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection. |
| title_full_unstemmed | Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection. |
| title_short | Preserved dendritic cell HLA-DR expression and reduced regulatory T cell activation in asymptomatic Plasmodium falciparum and P. vivax infection. |
| title_sort | preserved dendritic cell hla dr expression and reduced regulatory t cell activation in asymptomatic plasmodium falciparum and p vivax infection |
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