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Eosinophil Activity in Bronchial Asthma

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Eosinophil cationic proteins (ECP), eosinophil protein X (EPX), eosinophil peroxidase (EPO), eosinophil-derived neurotoxin (EDN), and the major basic protein (MBP) have been identified as potent cytotoxic secretory proteins in degranulated eosinophils. Studies of these proteins have clearly indicated a role for eosinophil-derived proteins in inflammatory diseases, including asthmatic inflammation. It has been shown that higher levels of ECP in asthmatics were concomitant with severity of the disease and related to efficacy of treatment of asthma. Proper handling of blood serum for measurement of eosinophil and neutrophil markers including myeloperoxidase (MPO) is essential. Moreover, the time factor in ECP measurement is an important variable because ECP levels differ in chronic stable asthma, during acute exacerbations of asthma, and after allergen challenge. Simultaneous measurements of ECP and MPO may prove to be useful in determining various causes of asthma exacerbations, helping to discriminate between allergic etiologies wherein ECP levels may increase versus infectious etiologies wherein MPO levels may increase. Monitoring the efficacy of anti-inflammatory therapies such as corticosteroids may be enhanced by serial determinations of ECP levels in the blood.

Document Type: Research Article


Publication date: May 1, 1994

More about this publication?
  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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