Abstract:
:Inflammatory cells, such as neutrophils and eosinophils, are thought to actively contribute to the pathogenesis of asthma since they infiltrate into the lung tissue and may be activated locally to release bronchoconstrictor mediators. In this study we provide evidence that nedocromil sodium is capable of effectively inhibiting the platelet-activating factor (PAF) and zymosan-activated serum (ZAS)-induced chemotaxis of polymorphonuclear granulocytes (PMN) [IC50 approximately 1 nmol/L and 0.1 mumol/L respectively]. The same inhibitory potency was obtained with sodium cromoglycate. Thus, nedocromil sodium may effectively inhibit the mobilisation of inflammatory cells in the lung. Furthermore, nedocromil sodium is capable of inhibiting the formation of the bronchoconstrictor mediator leukotriene-C4 (LTC4) by eosinophils in a concentration-dependent way [IC30 for A23187: 5.6 10(-5) mol/L; IC30 for opsonised zymosan (OZ): 6.3 10(-5) mol/L], whereas this drug is not capable of inhibiting leukotriene-B4 (LTB4) formation by neutrophils. These findings indicate that nedocromil sodium inhibits the release of bronchoconstrictor mediators not only from mast cells but also from eosinophils.
journal_name
Drugsjournal_title
Drugsauthors
Bruijnzeel PL,Warringa RA,Kok PT,Hamelink ML,Kreukniet Jdoi
10.2165/00003495-198900371-00004subject
Has Abstractpub_date
1989-01-01 00:00:00pages
9-18; discussion 69-77eissn
0012-6667issn
1179-1950journal_volume
37 Suppl 1pub_type
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