IL-3 produced by T cells is crucial for basophil extravasation in hapten-induced allergic contact dermatitis - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Frontiers in Immunology Année : 2023

IL-3 produced by T cells is crucial for basophil extravasation in hapten-induced allergic contact dermatitis

Résumé

Basophils have been recognized as a characterized cellular player for Th2 immune responses implicated in allergic diseases, but the mechanisms responsible for basophil recruitment to allergic skin remain not well understood. Using a hapten fluorescein isothiocyanate (FITC)-induced allergic contact dermatitis (ACD) mouse model, we show that basophils in FITC-treated IL-3-knockout mice are defective in crossing the vascular endothelium to enter the inflamed skin. By generating mice in which IL-3 is selectively ablated in T cells, we further demonstrate that IL-3 produced by T cells mediates basophil extravasation. Moreover, basophils sorted from FITC-treated IL-3-knockout mice exhibit a decreased expression of integrins Itgam, Itgb2, Itga2b and Itgb7, which are potentially implicated in extravasation process. Interestingly, we observed that these basophils had a reduced expression of retinaldehyde dehydrogenase 1 family member A2 (Aldh1a2), an enzyme responsible for the production of retinoic acid (RA), and administration of all-trans RA restored partially the extravasation of basophils in IL-3-knockout mice. Finally, we validate that IL-3 induces the expression of ALDH1A2 in primary human basophils, and provide further evidence that IL-3 stimulation induces the expression of integrins particularly ITGB7 in an RA-dependent manner. Together, our data propose a model that IL-3 produced by T cells activates ALDH1A2 expression by basophils, leading to the production of RA, which subsequently induces the expression of integrins crucially implicated in basophil extravasation to inflamed ACD skin.
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Dates et versions

hal-04222189 , version 1 (05-04-2024)

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Citer

Carole El Hachem, Pierre Marschall, Pierre Hener, Anupama Karnam, Srinivasa Reddy Bonam, et al.. IL-3 produced by T cells is crucial for basophil extravasation in hapten-induced allergic contact dermatitis. Frontiers in Immunology, 2023, 14, ⟨10.3389/fimmu.2023.1151468⟩. ⟨hal-04222189⟩
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