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Properties of the ideal corticosteroid therapy

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Abstract:

Currently, inhaled corticosteroids (ICSs) are the most effective long-term control therapy for persistent asthma. However, patients show a variable response to ICSs and some exhibit glucocorticoid resistance. At recommended doses, there is little evidence to suggest that ICSs can either prevent or reverse the chronic airflow limitation that develops in some asthma patients. Could an improvement in the therapeutic index and greater accessibility of the drug to peripheral airways improve patient outcomes? Can a more potent ICS overcome glucocorticoid resistance or prevent airway remodeling? An optimal response could be achieved by modifying the drug's pharmacokinetic and pharmacodynamic profile, thus maximizing potency while minimizing adverse effects, creating the "ideal" ICS. Increasing lung deposition by modifying the drug formulation, increasing the fraction of respirable particles and receptor binding affinity, and heightening lipophilicity to facilitate passage of the drug into airway cells all play a role in improving efficacy. Could a drug that undergoes lipid conjugation increase the time the drug remains in the lungs, potentially allowing for once-daily dosing? Improvements in drug safety can be achieved by optimizing half-life and plasma clearance, limiting oropharyngeal deposition by on-site activation in the lungs, and increasing plasma protein binding to reduce the amount of free drug in systemic circulation. Ciclesonide, a novel ICS currently being developed for the treatment of persistent asthma, achieves many of these positive properties. The delivery of this relatively high-potency drug to strategic areas of inflammation, without the development of significant adverse effects, ideally will lead to improved asthma outcomes.

Document Type: Research Article

Publication date: 2005-05-01

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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