Abstract:
BACKGROUND:Acanthamoebiasis is most often found in patients with immune deficiency, with infections facilitated by the intake of immunosuppressive drugs. The host immune response to Acanthamoeba spp. infection is poorly understood. Thus, in this study, we aimed to examine the course of Acanthamoeba spp. infection taking into account the host's immunological status, including assessment of the hematological parameters, cytokine analysis, immunophenotypic changes in spleen populations, and histological spleen changes, which could help clarify some aspects of the immune response to acanthamoebiasis. In our experimental study, we used Acanthamoeba strain AM 22 isolated from the bronchoaspirate of a patient with acute myeloid leukaemia (AML) and atypical pneumonia symptoms. RESULTS:Acanthamoeba spp. affected the hematological parameters in immunocompetent and immunosuppressed mice and induced a change in spleen weight during infection. Moreover, analysis of anti-inflammatory (IL-4 and IL-10) and pro-inflammatory (IL-17A and IFN-γ) cytokines produced by splenocytes stimulated with concanavalin A demonstrated that Acanthamoeba spp. induced a selective Th1, Th2 and Th17 response at later stages of the infection in immunocompetent hosts. In the case of hosts with low immunity, Acanthamoeba elicited robust Th1 cell-mediated immunity without the participation of Th17. We observed suppression of CD8+ and CD4+ T lymphocytes and CD3+CD4-CD8- double-negative (DN) T lymphocyte populations in the beginning, and in the case of CD3+/CD4+/CD8+ double-positive (DP) T cells in the final phase of Acanthamoeba spp. infection in hosts with low immunity. Also, CD4+T lymphocytes and CD3+/CD4+ and CD3+/CD8+ lymphocyte counts during each stage of acanthamoebiasis were shown to be upregulated. CONCLUSIONS:We demonstrated that analysis of the immune response and pathogenesis mechanisms of clinical isolates of Acanthamoeba spp. in an animal model not only has purely cognitive significance but above all, may help in the development of effective methods of pharmacological therapy especially in patients with low immunity.
journal_name
Parasit Vectorsjournal_title
Parasites & vectorsauthors
Łanocha-Arendarczyk N,Kolasa-Wołosiuk A,Wojciechowska-Koszko I,Kot K,Roszkowska P,Krasnodębska-Szponder B,Paczkowska E,Machaliński B,Łuczkowska K,Wiszniewska B,Kosik-Bogacka Ddoi
10.1186/s13071-018-3108-xsubject
Has Abstractpub_date
2018-09-20 00:00:00pages
517issue
1issn
1756-3305pii
10.1186/s13071-018-3108-xjournal_volume
11pub_type
杂志文章abstract:BACKGROUND:Knowledge of insecticide resistance status in the main malaria vectors is an essential component of effective malaria vector control. This study presents the first evaluation of the status of insecticide resistance in Anopheles gambiae populations from Bangui, the Central African Republic. METHODS:Anopheles...
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journal_title:Parasites & vectors
pub_type: 杂志文章,评审
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journal_title:Parasites & vectors
pub_type: 杂志文章
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journal_title:Parasites & vectors
pub_type: 已发布勘误
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journal_title:Parasites & vectors
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journal_title:Parasites & vectors
pub_type: 杂志文章,评审
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journal_title:Parasites & vectors
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journal_title:Parasites & vectors
pub_type: 杂志文章,随机对照试验
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journal_title:Parasites & vectors
pub_type: 杂志文章
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更新日期:2017-01-24 00:00:00
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journal_title:Parasites & vectors
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journal_title:Parasites & vectors
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-0704-x
更新日期:2015-02-08 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-014-0463-0
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3475-y
更新日期:2019-05-14 00:00:00
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pub_type: 杂志文章
doi:10.1186/1756-3305-4-24
更新日期:2011-02-26 00:00:00