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In situ study of cellular immune response in human cutaneous lesions caused by Leishmania (Viannia) panamensis in Panama
Author(s) -
Gonzalez Kadir,
Calzada José Eduardo,
Tomokane Thaise Yumie,
Pacheco Carmen Maria Sandoval,
Flores Gabriela Venicia Araujo,
Castro Gomes Cláudia Maria,
Pereira Corbett Carlos Eduardo,
Saldaña Azael,
Laurenti Marcia Dalastra
Publication year - 2021
Publication title -
parasite immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 75
eISSN - 1365-3024
pISSN - 0141-9838
DOI - 10.1111/pim.12801
Subject(s) - biology , immune system , cutaneous leishmaniasis , foxp3 , immunology , leishmania , leishmaniasis , cd8 , cellular immunity , immunity , leishmania major , parasite hosting , world wide web , computer science
Aims Leishmaniasis is considered a disease with multiple clinical/immunopathological characteristics, depending on the immunity of the host and the species of the parasite. In Panama, the most prevalent species that causes localized cutaneous leishmaniasis (LCL) is Leishmania (Viannia) panamensis , and its immune response is poorly studied. Therefore, we evaluated by immunohistochemistry, the in situ immune response during this infection. Methods and Results Biopsies from Panamanian patients with LCL were collected and processed by histological techniques. Infection by L. (V.) panamensis was demonstrated by isolation in culture and molecular characterization by Hsp70‐RFLP. The in situ immune response was assessed by immunohistochemistry. The immune response was characterized by predominance of T cells, mainly CD8 cells that showed positive correlation with IFN‐γ and Granzyme B. CD4 cells presented positive correlation with both IFN‐γ and IL‐13, pointed by mixed cellular immune response. Regulatory response was characterized by FoxP3 cells, which showed positive correlation to IL‐10 but not with TGF‐β. Conclusions L. (V.) panamensis infection triggers a mixed cellular immune response, characterized by the presence of pro‐inflammatory, anti‐inflammatory and regulatory elements in the skin lesion of Panamanian patients. These data contribute to a better understanding of the immunopathogenesis of Leishmania Viannia infection in Panama.