Increased platelet distribution width and reduced IL-2 and IL-12 are associated with thrombocytopenia in Plasmodium vivax malaria
Mem. Inst. Oswaldo Cruz
;
115: e200080, 2020. tab, graf
Article
in English
| LILACS, SES-SP
| ID: biblio-1135269
ABSTRACT
BACKGROUND Thrombocytopenia in malaria involves platelet destruction and consumption; however, the cellular response underlying this phenomenon has still not been elucidated. OBJECTIVE To find associations between platelet indices and unbalanced Th1/Th2/Th17 cytokines as a response to thrombocytopenia in Plasmodium vivax infected (Pv-MAL) patients. METHODS Platelet counts and quantification of Th1/Th2/Th17 cytokine levels were compared in 77 patients with uncomplicated P. vivax malaria and 37 healthy donors from the same area (endemic control group - ENCG). FINDINGS Thrombocytopenia was the main manifestation in 55 patients, but was not associated with parasitaemia. The Pv-MAL patients showed increases in the mean platelet volume (MPV), which may be consistent with larger or megaplatelets. Contrary to the findings regarding the endemic control group, MPV and platelet distribution width (PDW) did not show an inverse correlation, due the increase in the heterogeneity of platelet width. In addition, the Pv-MAL patients presented increased IL-1β and reduced IL-12p70 and IL-2 serum concentrations. Furthermore, the reduction of these cytokines was associated with PDW values. MAIN CONCLUSIONS Our data demonstrate that an increase in MPV and the association between reductions of IL-2 and IL-12 and PDW values may be an immune response to thrombocytopenia in uncomplicated P. vivax malaria.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Plasmodium vivax
/
Thrombocytopenia
/
Lymphocyte Subsets
/
Malaria, Vivax
Type of study:
Risk factors
Limits:
Humans
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Year:
2020
Type:
Article
Institution/Affiliation country:
Fundação Hospitalar de Hematologia e Hemoterapia do Amazonas/BR
/
Fundação Oswaldo Cruz-Fiocruz/BR
/
Fundação de Medicina Tropical Dr Heitor Vieira Dourado/BR
/
Universidade Estadual de Campinas/BR
/
Universidade do Estado do Amazonas/BR
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