Aspirin modified dendritic cells are potent inducers of allo-specific regulatory T-cells.

Abstract:

:Salicylic acid (aspirin) is a widely used pharmacological agent with immunodmodulatory properties. Dendritic cells are key regulators of the immune response, and are capable of inducing hyporesponsiveness and regulatory activity in CD4+ T-cells. We have demonstrated that aspirin-treated dendritic cells are effective at antigen processing and presentation, and possess a unique potency for inducing regulatory activity in responder T-cells. Unlike immature dendritic cells, aspirin DCs are resistant to the effects of maturational stimuli, as determined by low levels of CD40, CD80, CD83 and CD86 expression. Aspirin DCs were demonstrated to express high levels of the co-inhibitor of T-cell activation ILT-3. Aspirin DCs themselves produce less IL-10 and more IL-12 than immature DCs, but no specific cytokine is necessary for their tolerogenic capacity. When naïve CD4+ T-cells are exposed to aspirin DCs they produce significant levels of IFNgamma but these same T-cells are hypo-proliferative. Aspirin-treated DCs demonstrate the characteristics of a potential immunotherapy for controlling unwanted immune-responses such as the indirect pathway of allo-recognition that drives chronic allograft rejection.

journal_name

Int Immunopharmacol

authors

Buckland M,Jago C,Fazekesova H,George A,Lechler R,Lombardi G

subject

Has Abstract

pub_date

2006-12-20 00:00:00

pages

1895-901

issue

13-14

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(06)00209-8

journal_volume

6

pub_type

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