Human interleukin-36γ plays a crucial role in cytokine induction during Sporothrix brasiliensis and S. schenckii infection in keratinocytes and PBMCs

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Tipo de produção
article
Data de publicação
2024
DOI
Scopus
Web of Science
PubMed
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Editora
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Autores
KISCHKEL, Brenda
SANTOS, Jessica C. dos
LOPES-BEZERRA, Leila
JOOSTEN, Leo A. B.
Citação
MICROBIAL PATHOGENESIS, v.188, article ID 106550, 9p, 2024
Projetos de Pesquisa
Unidades Organizacionais
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Resumo
Cytokines of the interleukin (IL)-1 superfamily including the different IL-36 isoforms, have been reported as mediators of acute and chronic inflammation in human skin diseases, such as psoriasis. Here, we demonstrated for the first time that Sporothrix schenckii and S. brasiliensis, the fungi that cause subcutaneous infection sporotrichosis, can induce the expression of IL-36 alpha, IL-36 gamma and IL-36Ra in human keratinocytes and primary peripheral blood mononuclear cells (PBMCs). Specifically, IL-36 gamma was differentially expressed by keratinocytes stimulated with Sporothrix yeasts when compared to the commensal microorganism Staphylococcus epidermidis. The exposure of keratinocytes to 24 h or 7-days culture supernatant of PBMCs stimulated with Sporothrix induced higher IL-36 gamma production compared to direct stimulation of keratinocytes with the live fungus. We identified that IL-36 gamma mRNA expression in keratinocytes is increased in the presence of IL-17, TNF, IL-113 and IL-1 alpha and these cytokines may act synergistically to maintain IL-36 gamma production. Lastly, using a cohort of 164 healthy individuals, we showed that individuals carrying variants of the IL36G gene (rs11690399 and rs11683399) exhibit increased IL-36 gamma production as well as increased innate cytokine production after Sporothrix exposure. Importantly, stimulation of PBMCs with recombinant IL-36 gamma increased the production of IL-113 and IL-6, while IL-36Ra were able to decrease the concentration of these cytokines. Our findings contribute to the understanding of the pathogenesis of sporotrichosis and suggest that IL-36 gamma may be involved in maintaining the cytokine loop that leads to tissue destruction by exacerbating the immune response in sporotrichosis. Of high interest, we present the IL-36 signalling pathway as a potential new therapeutic target.
Palavras-chave
Sporotrichosis, Cytokines, Subcutaneous infection, Inflammation
URI
https://observatorio.fm.usp.br/handle/OPI/59261
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Coleções
Artigos e Materiais de Revistas Científicas - LIM/53