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Specific IgE against Staphylococcus aureus enterotoxins: an independent risk factor for asthma

Bachert, C., van Steen, K., Zhang, N., Holtappels, G., Cattaert, T., Maus, B., Buhl, R., Taube, C., Korn, S., Kowalski, M., Bousquet, J. and Howarth, P.H. (2012) Specific IgE against Staphylococcus aureus enterotoxins: an independent risk factor for asthma Journal of Allergy and Clinical Immunology, 130, (2), pp. 376-381. (doi:10.1016/j.jaci.2012.05.012).

Record type: Article

Abstract

Background: the role of IgE in patients with severe asthma is not fully understood.

Objective: we sought to investigate whether IgE to Staphylococcus aureus enterotoxins might be relevant to disease severity in adult asthmatic patients.

Methods: specific IgE antibody concentrations in serum against enterotoxins, grass pollen (GP), and house dust mite allergens and total IgE levels were measured in adult cohorts of 69 control subjects, 152 patients with nonsevere asthma, and 166 patients with severe asthma. Severe asthma was defined as inadequately controlled disease despite high-dose inhaled corticosteroids plus at least 2 other controller therapies, including oral steroids.

Results: enterotoxin IgE positivity was significantly greater in patients with severe asthma (59.6%) than in healthy control subjects (13%, P < .001). Twenty-one percent of patients with severe asthma with enterotoxin IgE were considered nonatopic. Logistic regression analyses demonstrated significantly increased risks for enterotoxin IgE–positive subjects to have any asthma (OR, 7.25; 95% CI, 2.7-19.1) or severe asthma (OR, 11.09; 95% CI, 4.1-29.6) versus enterotoxin IgE–negative subjects. The presence of GP or house dust mite IgE antibodies was not associated with either significantly increased risk for asthma or severity. Oral steroid use and hospitalizations were significantly increased in patients with enterotoxin IgE and nonatopic asthma. GP IgE was associated with a higher FEV1 percent predicted value, and enterotoxin IgE was associated with a lower FEV1 percent predicted value.

Conclusions: staphylococcal enterotoxin IgE antibodies, but not IgE against inhalant allergens, are risk factors for asthma severity. We hypothesize that the presence of enterotoxin IgE in serum indicates the involvement of staphylococcal superantigens in the pathophysiology of patients with severe asthma

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Published date: 2012
Keywords: asthma, asthma severity, hospitalizations, FEV1, IgE, staphylococcus aureus, enterotoxins, superantigens
Organisations: Clinical & Experimental Sciences

Identifiers

Local EPrints ID: 341332
URI: http://eprints.soton.ac.uk/id/eprint/341332
ISSN: 0091-6749
PURE UUID: 795a3931-a513-4ae9-8d04-2ded54959532

Catalogue record

Date deposited: 23 Jul 2012 10:40
Last modified: 18 Jul 2017 05:37

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Contributors

Author: C. Bachert
Author: K. van Steen
Author: N. Zhang
Author: G. Holtappels
Author: T. Cattaert
Author: B. Maus
Author: R. Buhl
Author: C. Taube
Author: S. Korn
Author: M. Kowalski
Author: J. Bousquet
Author: P.H. Howarth

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