CCR5-Positive Inflammatory Monocytes are Crucial for Control of Sepsis

Autor(es):Mostrar menos -

Castanheira, Fernanda Vargas e Silva ^{[1, 2]} ; de Lima, Kalil Alves ^{[1, 2]} ; Martelossi Cebinelli, Guilherme Cesar ^{[1, 2]} ; Sonego, Fabiane ^[1] ; Kanashiro, Alexandre ^{[1, 2]} ; Colon, David-Fernando ^{[1, 2]} ; Borges, Vanessa ^{[1, 2]} ; Czaikoski, Paula Giselle ^[1] ; Mota, Jose Mauricio ^[3] ; Cunha, Thiago Mattar ^{[1, 2]} ; Alves-Filho, Jose Carlos ^{[1, 2]} ; Liew, Foo Y. ^{[4, 5]} ; Cunha, Fernando Queiroz ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Med Ribeira Preto, Dept Pharmacol, Ave Bandeirantes 3900, BR-14049900 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Sch Med Ribeira Preto, Dept CRID Ctr Res Inflammatory Dis, Ribeirao Preto - Brazil

^[3] Univ Sao Paulo, Canc Inst State Sao Paulo, Sao Paulo - Brazil

^[4] Soochow Univ, Sch Biol & Basic Med Sci, Suzhou - Peoples R China

^[5] Univ Glasgow, Inst Infect Immun & Inflammat, Glasgow, Lanark - Scotland

• Tipo de documento: Artigo Científico
• Fonte: Shock; v. 52, n. 5, p. E100-E106, NOV 2019.
• Citações Web of Science: 2

Resumo

Neutrophils and inflammatory monocytes control sepsis by migration to the site of infection via their chemokine receptors. CCR5 is a chemokine receptor that is not expressed on neutrophils and inflammatory monocytes under homeostatic conditions. However, it has been demonstrated that CCR5 can become expressed on these cells during different models of inflammation. In the present study, we investigated if CCR5 is also expressed on neutrophil and inflammatory monocytes during sepsis, exerting an important role in the migration of these cells to the infectious focus. Using cecal ligation and puncture model to induce polymicrobial sepsis, we demonstrated that the expression of CCR5 is induced on CD11b(+)Ly6G(-)Ly6C(high) inflammatory monocytes, but not on neutrophils (CD11b(+)Ly6G(+)Ly6C(-)). Furthermore, CCR5 plays an important role for the migration of the inflammatory monocytes to infection focus during sepsis. CCR5-expressing inflammatory monocytes migrate from the bone marrow to the circulation and then into the site of infection, where they phagocytize and kill the bacteria. Consequently, CCR5(-/-) mice showed increased systemic inflammatory response and mortality compared to wild-type mice. These data therefore demonstrate a hitherto unrecognized protective role of CCR5 in sepsis. (AU)

• Processo FAPESP: 13/08216-2 - CPDI - Centro de Pesquisa em Doenças Inflamatórias
• Beneficiário: Fernando de Queiroz Cunha
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 12/04132-6 - Papel do receptor D6 no desenvolvimento da resposta inflamatória durante a sepse
• Beneficiário: Fernanda Vargas e Silva Castanheira
• Modalidade de apoio: Bolsas no Brasil - Doutorado