期刊
JOURNAL OF EXPERIMENTAL MEDICINE
卷 204, 期 4, 页码 865-877出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20070029
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Arachidonic acid metabolites, the eicosanoids, are key mediators of allergen-induced airway inflammation and remodeling in asthma. The availability of free arachidonate in cells for subsequent eicosanoid biosynthesis is controlled by phospholipase A(2)s ( PLA(2)s), most notably cytosolic PLA(2)-alpha 10 secreted PLA(2)s ( sPLA(2)s) have also been identified, but their function in eicosanoid generation is poorly understood. We investigated the role of group X sPLA(2) ( sPLA(2)-X), the sPLA(2) with the highest in vitro cellular phospholipolysis activity, in acute and chronic mouse asthma models in vivo. The lungs of sPLA(2)-X-/- mice, compared with those of sPLA(2)-X+/+ littermates, had significant reduction in ovalbumin-induced infiltration by CD4(+) and CD8(+) T cells and eosinophils, goblet cell metaplasia, smooth muscle cell layer thickening, subepithelial fibrosis, and levels of T helper type 2 cell cytokines and eicosanoids. These data direct attention to sPLA(2)-X as a novel therapeutic target for asthma.
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