Artesunate strongly modulates myeloid and regulatory T cells to prevent LPS-induced systemic inflammation

Autor(es)

Mancuso, Rubia Isler ^[1] ; Azambuja, Juliana Hofstatter ^[1] ; Olalla Saad, Sara Teresinha ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Hematol & Transfus Med Ctr, Rua Carlos Chagas 480, BR-13083878 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOMEDICINE & PHARMACOTHERAPY; v. 143, NOV 2021.
• Citações Web of Science: 0

Resumo

Lipopolysaccharide (LPS) is the major component of the outer membrane of Gram-negative bacteria and is usually administrated to establish models of inflammation. Artesunate (ART), a water-soluble artemisinin derivative, displays multiple pharmacological actions against tumors, viral infections, and inflammation, and has been used as a therapeutic weapon against malaria. In this study, our aim was to evaluate whether ART pretreatment is capable of preventing inflammation induced by LPS. BALB/c mice were treated with 100 mg/kg of ART i.p. for 7 days followed by a single dose of LPS. ART pretreatment led to an improvement in clinical score, prevented alterations in biochemical markers, and reestablished the platelet counts. Flow cytometry analysis showed that ART protected the inflammation mainly by reducing the percentage of M1 macrophages while increasing M2 macrophages and a reestablishment of classical monocytes in the BM. In the spleen, ART pretreatment increased N2 neutrophils, myeloid-derived suppressor cells (MDSC), and regulatory T cells, the latter was also increased in peripheral blood. In addition, a marked decrease in inflammatory cytokines and chemokines was observed in the ART treated group. Our data suggest that ART prevents inflammation, reducing tissue damage and restoring homeostasis. (AU)

• Processo FAPESP: 17/21801-2 - Preditores de gravidade e novos tratamentos para neoplasias da medula óssea
• Beneficiário: Sara Teresinha Olalla Saad
• Modalidade de apoio: Auxílio à Pesquisa - Temático