RT Journal Article T1 The leukocyte activation antigen CD69 limits allergic asthma and skin contact hypersensitivity A1 Martín, Pilar A1 Gómez, Manuel A1 Lamana Domínguez, Amalia A1 Matesanz Marín, Adela A1 Cortés, José A1 Ramírez-Huesca, Marta A1 Barreiro, Olga A1 López-Romero, Pedro A1 Gutiérrez-Vázquez, Cristina A1 Fuente, Hortensia de la A1 Cruz Adalia, Aranzazu A1 Sánchez-Madrid, Francisco AB Background:Allergic diseases have a major health care impact in industrialized countries. The development of these diseases is influenced by exposure to allergen and to immunological and genetic factors. However, the molecular mechanisms underlying the inflammatory response that triggers allergy are not well defined.Objective:We have investigated the role of the leukocyte activation antigen CD69 in the regulation of two allergic diseases, asthma and contact dermatitis.Methods:Analysis of two models of allergic diseases in CD69 knockout and wild-type mice: ovalbumin-induced allergic airway inflammation (BALB/c genetic background) and contact hypersensitivity to oxazolone (C57BL/6J genetic background).Results:CD69 deficiency dramatically enhanced the inflammatory response in the ovalbumin-induced asthma model of antigen-induced airway allergy. CD69 knockout mice showed exacerbated pulmonary eosinophil recruitment, high vascular cell adhesion molecule 1 expression levels in lung vasculature, and enhanced TH2 and TH17 cytokines in the bronchoalveolar space and lung tissue. In the hapten-induced cutaneous contact hypersensitivity model, both CD69 deficiency and treatment with anti-CD69 mAb increased inflammation. Treatment with contact allergens induced enhanced TH1 and TH17 responses in CD69 deficient mice, and neutralizing anti–IL-17 antibodies reduced skin inflammation. In both experimental systems, adoptive transfer of lymph node cells from CD69 knockout mice increased the inflammatory response in recipient mice. PB Elsevier SN 0091-6749 YR 2010 FD 2010 LK https://hdl.handle.net/20.500.14352/94019 UL https://hdl.handle.net/20.500.14352/94019 LA eng NO Martín, Pilar, et al. «The Leukocyte Activation Antigen CD69 Limits Allergic Asthma and Skin Contact Hypersensitivity». Journal of Allergy and Clinical Immunology, vol. 126, n.o 2, agosto de 2010, pp. 355-365.e3. https://doi.org/10.1016/j.jaci.2010.05.010. NO Ministerio de Ciencia e Innovación (España) NO Comunidad de Madrid NO Instituto de Salud Carlos III DS Docta Complutense RD 10 abr 2025