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Programmed death ligand 1 (PD-L1) plays a vital part in DC tolerogenicity induced by IFN-[gamma] [Elektronski vir]Švajger, Urban ; Tešić, Nataša ; Rožman, Primož, 1954-Interferon-[gamma] (IFN-[gamma]) is the sole representative of type II IFNs, with well recognized role in numerous inflammatory processes. Lately, its significant pleiotropic nature has been ... recognized in many scenarios, where IFN-[gamma] contributes to maintenance or induction of tolerogenic responses in context of various immune cell types. In this manuscript we demonstrate, that IFN-[gamma]-mediated induction of programmed death ligand 1 (PD-L1) on human monocyte-derived dendritic cells (DCs) represents an important tolerogenic aspect in immunological network of type II IFNs. When fully differentiated, immature DCs were treated with increasing concentrations of IFN-[gamma] there was no sign of maturation, as revealed by CD80, CD83 and CD86 expression. In terms of co-stimulatory receptor response, we did observe a dose-dependent increase in CD40 expression. Phenotypic analysis of inhibitory molecules revealed that PD-L1 expression is particularly sensitive to IFN-[gamma], as its expression can be induced almost 10-fold in comparison to non-treated DCs. Functional analysis of such PD-L1high DCs revealed significant immunosuppressive properties in a mixed lymphocyte reaction with whole or memory CD4+ T cells. When IFN-[gamma] treated DCs were co-cultured with naive CD4+CD45RA+ T cells, they induced an increased percentage of CD4+CD25+CD127-FoxP3+ Tregs. Inhibition of PD-1/PD-L1 axis using neutralizing anti-PD-L1 mAbs, reversed the immunosuppressive effect of IFN-[gamma]-treated DCs to suppress CD4+ T cell proliferation and to induce Tregs. In summary, our findings demonstrate the importance of IFN-[gamma]-mediated tolerogenic effects, exerted on DCs by inducing increased expression of PD-L1, which enhances their regulatory function.Vir: International immunopharmacology. - ISSN 1878-1705 (Vol. 99, 2021, str. 1-5)Vrsta gradiva - e-članekLeto - 2021Jezik - angleškiCOBISS.SI-ID - 71542531
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Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Švajger, Urban | 26198 |
Tešić, Nataša | 34477 |
Rožman, Primož, 1954- | 12336 |
Vir: Osebne bibliografije
in: SICRIS
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