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Involvement of CCL18 in allergic asthma.

par De Nadai, Patricia ;Charbonnier, Anne-Sophie;Chenivesse, Cécile;Sénéchal, Stéphanie;Fournier, Clément;Gilet, Jules;Vorng, Han;Chang, Ying;Gosset, Philippe;Wallaert, Benoît;Tonnel, André-Bernard;Lassalle, Philippe;Tsicopoulos, Anne
Référence The Journal of immunology, 176, 10, page (6286-6293)
Publication Publié, 2006-05

Article révisé par les pairs

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Résumé :

Allergic asthma is associated with a pulmonary recruitment of Th type 2 cells, basophils, and eosinophils, mainly linked to chemokine production. CCL18 is a chemokine preferentially expressed in the lung, secreted by APCs, induced by Th2-type cytokines, and only present in humans. Therefore, CCL18 may be involved in allergic asthma. PBMC from asthmatics allergic to house dust mite cultured in the presence of Dermatophagoides pteronyssinus 1 (Der p 1) allergen secreted CCL18, 48 and 72 h after stimulation, whereas those from healthy donors did not. Part of CCL18 was directly derived from Der p 1-stimulated plasmacytoid dendritic cells, whereas the other part was linked to monocyte activation by IL-4 and IL-13 produced by Der p 1-stimulated T cells. In bronchoalveolar lavages from untreated asthmatic allergic patients, CCL18 was highly increased compared with controls. Functionally, CCL18 preferentially attracted in vitro-polarized Th2 cells and basophils, but not eosinophils and Th1 cells, and induced basophil histamine and intracellular calcium release. These data show a new function for CCL18, i.e., the recruitment of Th2 cells and basophils, and suggest that CCL18 may play a predominant role in allergic asthma.