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  • Title: Neutrophil chemotactic factor in exercise- and hyperventilation-induced asthma.
    Author: Nagakura T, Lee TH, Assoufi BK, Newman-Taylor AJ, Denison DM, Kay AB.
    Journal: Am Rev Respir Dis; 1983 Aug; 128(2):294-6. PubMed ID: 6349443.
    Abstract:
    Elevated levels of the mast-cell-associated serum neutrophil chemotactic factor (NCF) and an increase in blood basophil counts were observed in 6 atopic asthmatics during exercise-induced asthma (EIA). These changes were not found when the same degree of airways obstruction was elicited in the same subjects by isocapnic hyperventilation (ISH) with cold air. The NCF was unlikely to be related to the basophilia alone, because asthmatics without EIA who underwent the same exercise task, produced a similar basophilia but significantly less NCF. These findings suggest that mast-cell-associated (as opposed to basophil-associated) mediators of hypersensitivity are detectable in the bloodstream during the bronchoconstriction induced by exercise, but not by ISH.
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