The leishmaniases are a collection of vector-borne parasitic diseases caused by a number of different species that are distributed worldwide. Clinical and laboratory research have together revealed several important immune components that control infection and indicate the potential of immunization to prevent leishmaniasis. In this review we introduce previous and ongoing experimental research efforts to develop vaccines against species. First, second and third generation vaccine strategies that have been proposed to counter cutaneous and visceral leishmaniasis (CL and VL, respectively) are summarized. One of the major bottlenecks in development is the transition from results in animal model studies to humans, and we highlight that although American tegumentary leishmaniasis (ATL; New World CL) can progress to destructive and disfiguring mucosal lesions, most research has been conducted using mouse models and Old World species. We conclude that assessment of vaccine candidates in ATL settings therefore appears merited.
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http://dx.doi.org/10.1080/21645515.2019.1678998 | DOI Listing |
Front Cell Infect Microbiol
January 2025
Laboratório de Imunidade Natural (LIN), Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
Background: The vitamin D pathway contributes to the microbicidal activity of macrophages against infection. In addition to induction of this pathway, interferon-gamma (IFNγ), interleukin (IL)-15, and IL32γ are part of a network of pro-inflammatory cytokines. The aim of this study was to evaluate single-nucleotide polymorphisms (SNPs) in the components of the vitamin D pathway and associated cytokine genes that could be related to resistance or susceptibility to American tegumentary leishmaniasis (ATL).
View Article and Find Full Text PDFParasitology
November 2024
Center for Molecular and Cellular Biosciences, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, USA.
The challenge of American tegumentary leishmaniasis (ATL) continues in Brazil, presenting a persistent public health issue despite initiatives aimed at public outreach, vector control and health education. To gain a deeper understanding of this disease, a study was conducted in an endemic region located in the northern region of the state of Minas Gerais, Brazil. The study monitored 30 resident patients diagnosed with ATL, using serum samples from 6 healthy individuals as controls.
View Article and Find Full Text PDFBiomedicines
September 2024
Post-Graduation Program in Clinical Medicine (PPGCM), Faculty of Medicine (FM), Campus Universitário Darcy Ribeiro, University of Brasília (UnB), UnB Área 1-Asa Norte, Brasilia 70910-900, DF, Brazil.
Background: Mucosal leishmaniasis (ML) is a deforming type of American Tegumentary Leishmaniasis caused by () that frequently does not respond to treatment. Despite its relapsing clinical course, few parasites are usually found in mucosal lesions. Host and parasite factors may be responsible for this paradox in the pathogenesis of the disease, allowing for both a low parasite burden and the inability of the host to clear and eliminate the disease.
View Article and Find Full Text PDFRev Peru Med Exp Salud Publica
October 2024
Centro Nacional de Salud Pública, Instituto Nacional de Salud, Lima, Perú.
Clin Exp Immunol
October 2024
Núcleo de Doenças Infecciosas, Universidade Federal do Espírito Santo, Brazil.
The American Tegumentary Leishmaniasis (ATL) is caused by protozoans of the genus Leishmania and varies from mild localized cutaneous leishmaniasis (LCL) form to more severe manifestations such as the diffuse cutaneous leishmaniasis (DCL) form and the mucosal leishmaniasis (ML) form. Previously, we demonstrated the accumulation of senescent cells in skin lesions of patients with LCL. Moreover, lesional transcriptomic analyses revealed a robust co-induction of senescence and pro-inflammatory gene signatures, highlighting the critical role of senescent T cells in orchestrating pathology.
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