当前位置： SCI文献检索 > INTERNATIONAL IMMUNOPHARMACOLOGY期刊下所有文献 > Loxoribine, a selective Toll-like receptor 7 agonist, induces maturation of human monocyte-derived dendritic cells and stimulates their Th-1- and Th-17-polarizing capability.

Loxoribine, a selective Toll-like receptor 7 agonist, induces maturation of human monocyte-derived dendritic cells and stimulates their Th-1- and Th-17-polarizing capability.

Abstract：

:Recently, a guanosine analog, 7-allyl-7,8-dihydro-8-oxo-guanosine (loxoribine), has been identified as a selective Toll-like receptor (TLR)7 agonist. Bearing in mind the controversy regarding the expression of TLR7 by human myeloid dendritic cells (DCs) and its significance for functions of these cells, the goal of this study was to investigate the effect of loxoribine on differentiation, maturation and functions of human monocyte-derived (Mo)DCs. Immature MoDCs were obtained by cultivation of monocytes for 6 days with recombinant granulocyte macrophage-colony stimulating factor (GM-CSF) and interleukin (IL)-4. These cells were stimulated with loxoribine (250 μM) for an additional 48 h. Phenotypic properties of MoDCs were determined by flow cytometry, cytokine production was assayed by ELISA, whereas their allostimulatory capability was tested using a mixed leukocyte reaction. We showed that loxoribine up-regulated the expression of TLR7, CD40, CD54, CD80, CD83 and CCR7 and stimulated the production of IL-12, IL-23, IL-27 and IL-10 by MoDCs, whereas the level of interferon (IFN)-β was not modulated. Allogeneic CD4(+)T cells in co-culture with loxoribine-treated MoDCs proliferated more strongly, at lower DC/CD4(+)T-cell ratio (1:80), and secreted significantly higher levels of IL-17 and IFN-γ compared to the cultures with control MoDCs. The stimulatory effect of loxoribine on T helper (Th)1 polarization capability of MoDCs was further potentiated by ligation of CD40. In conclusion, our results show that loxoribine stimulated differentiation, maturation, allostimulatory as well as Th1 and Th17 polarization capability of human MoDCs and suggests that these effects might be associated with up-regulation of TLR7 expression, but not increased IFN-β production.

journal_name

Int Immunopharmacol

journal_title

International immunopharmacology

authors

Dzopalic T,Dragicevic A,Vasilijic S,Vucevic D,Majstorovic I,Bozic B,Balint B,Colic M

doi

10.1016/j.intimp.2010.08.010

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

1428-33

issue

11

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(10)00264-X

journal_volume

10

pub_type

杂志文章

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