in the present study , the bronchoconstrictors prostaglandin d2 ( pgd2 ) and thromboxane ( tx ) , and those prostanoids able to protect against bronchoconstriction , prostaglandin e2 ( pge2 ) , and the stable metabolite of prostacyclin , 6-keto-prostaglandin f1 alpha ( 6-keto-pgf1 alpha ) , were measured in bronchoalveolar lavage fluid ( balf ) before and 5 min after endobronchial allergen challenge in four subject groups : nonatopic nonasthmatics ( n = 6 ) , nonatopic asthmatics ( n = 3 ) , atopic nonasthmatics ( n = 9 ) , and atopic asthmatics ( n = 8 ) .
C0033554
prostanoids
C0012472
prostaglandin e2