Comparison of ciliary activity and inflammatory mediator release from bronchial epithelial cells of nonatopic nonasthmatic subjects and atopic asthmatic patients and the effect of diesel exhaust particles in vitro☆,☆☆,★,★★
Section snippets
Nonatopic nonasthmatic subjects and atopic asthmatic patients
Twenty-eight volunteers (12 women and 16 men) with a mean age of 29 years (range, 19 to 45 years) took part in the study. Of these, 13 were nonatopic nonasthmatic subjects (control subjects) and 15 were atopic mildly asthmatic patients. The characteristics of these individuals are shown in Table I and demonstrated that there were no significant differences in the age and sex ratios.
Group Subject Age (y) Sex Atopy (SPT) PC20 FEV1 (mg/mL) HDM GP AF Dog Cat Nonatopic
RESULTS
These studies have demonstrated that epithelial cells can be grown as explant cultures from bronchial biopsy specimens of well-characterized nonatopic nonasthmatic subjects and atopic asthmatic patients (Fig 1). The cells reached confluence after 2 to 3 weeks in culture and demonstrated typical polygonal morphology characteristic of epithelial cells. The epithelial nature of the cells was confirmed by
DISCUSSION
These studies have demonstrated that bronchial epithelial cells can be grown as confluent explant cultures from biopsy specimens of well-characterized groups of both atopic asthmatic patients and nonatopic nonasthmatic subjects. Additionally, these studies have demonstrated that the cells of atopic asthmatic patients are different from the cells of nonatopic nonasthmatic subjects, with regard to the quantities and types of specific proinflammatory mediators that they can release constitutively,
Acknowledgements
We thank Janice Thomas (Computer Services Department, St Bartholomew’s Hospital, London) for her advice on the statistical analysis of the data.
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Cited by (0)
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From a the Academic Department of Respiratory Medicine, St Bartholomew’s and the Royal London School of Medicine and Dentistry, The London Chest Hospital; and the b National Institute for Environmental Studies, Research Team for Health Effects of Air Pollutants, Ibaraki.
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Supported by the National Asthma Campaign, UK, and the University of Dicle, Turkey (H.B.).
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Reprint requests: Jagdish L. Devalia, PhD, Academic Department of Respiratory Medicine, St Bartholomew’s and the Royal London School of Medicine and Dentistry, The London Chest Hospital, Bonner Road, London E2 9JX, UK.
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