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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Tr-1-Like CD4(+)CD25(-)CD127(-/low)FOXP3(-) Cells Are the Main Source of Interleukin 10 in Patients With Cutaneous Leishmaniasis Due to Leishmania braziliensis

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Autor(es):
Costa, Diego L. [1] ; Cardoso, Tiago M. [2, 3] ; Queiroz, Adriano [2, 3] ; Milanezi, Cristiane M. [1] ; Bacellar, Olivia [2, 3] ; Carvalho, Edgar M. [2, 3] ; Silva, Joao S. [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Med Sch Ribeirao Preto, Dept Biochem & Immunol, BR-14049900 Ribeirao Preto, SP - Brazil
[2] Univ Fed Bahia, Immunol Serv, Univ Hosp Prof Edgar Santos, Salvador, BA - Brazil
[3] Natl Inst Sci & Technol Trop Dis INCT DT, Salvador, BA - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of Infectious Diseases; v. 211, n. 5, p. 708-718, MAR 1 2015.
Citações Web of Science: 10
Resumo

CD4(+)CD25(+)FOXP3(+) regulatory T cells have long been shown to mediate susceptibility to Leishmania infection, mainly via interleukin 10 production. In this work, we showed that the main sources of interleukin 10 in peripheral blood mononuclear cells (PBMCs) from patients with cutaneous leishmaniasis due to Leishmania braziliensis are CD4(+)CD25(-)CD127(-/low)FOXP3(-) cells. Compared with uninfected controls, patients with CL had increased frequencies of circulating interleukin 10-producing CD4(+)CD25(-)CD127(-/low) cells, which efficiently suppressed tumor necrosis factor alpha production by the total PBMC population. Also, in CL lesions, interleukin 10 was mainly produced by CD4(+)CD25(-) cells, and interleukin 10 messenger RNA expression was associated with interleukin 27, interleukin 21, and interferon. expression, rather than with FOXP3 or transforming growth factor beta expressions. Active production of both interleukin 27 and interleukin 21, together with production of interferon gamma and interleukin 10, was also detected in the lesions. Since these cytokines are associated with the differentiation and activity of Tr-1 cells, our results suggest that this cell population may play an important role in the immunomodulation of CL. Therefore, development of treatments that interfere with this pathway may lead to faster parasite elimination. (AU)

Processo FAPESP: 08/05982-8 - Modulação da resposta imune a Leishmania braziliensis por células T reguladoras
Beneficiário:Diego Luís Costa
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 07/53940-0 - Células T reguladoras e TH 17 no controle da imunidade contra infecções, tumores e doenças autoimunes
Beneficiário:João Santana da Silva
Linha de fomento: Auxílio à Pesquisa - Temático