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The effects of Mycobacterium vaccae on allergen-induced airway responses in atopic asthma

Camporota, L., Corkhill, A., Long, H., Lordan, J., Stanciu, L., Tuckwell, N., Cross, A., Stanford, J.L., Rook, G.A., Holgate, S.T. and Djukanovic, R. (2003) The effects of Mycobacterium vaccae on allergen-induced airway responses in atopic asthma European Respiratory Journal, 21, (2), pp. 287-293. (doi:10.1183/09031936.03.00042103).

Record type: Article


T-helper (Th)2 cytokines play a central role in asthma. Therefore, a double-blind randomised study was conducted to investigate whether heat-killed Mycobacterium vaccae (SRL172), a potent downregulator of Th2 cytokines, can reduce allergen-induced airway responses in patients with atopic asthma.
A total 24 male asthmatics participated in this study. A bronchial allergen challenge was performed along with early (EAR) and late asthmatic responses (LAR) 2 weeks before and 3 weeks after a single intradermal injection of SRL172 or placebo. Before and after treatment, serum immunoglobulin (Ig)E levels and in vitro production of interleukin (IL)-5 by peripheral blood lymphocytes were studied.
Neither treatment affected the EAR. SRL172 caused a mean 34% reduction of the area under the curve of the forced expiratory volume in one second (FEV1) changes during the LAR, which failed to reach conventional statistical significance when compared with placebo. SRL172 also caused a mean 25% decrease in the maximum fall in FEV1 during LAR, but this was not significantly different from placebo. SRL172 caused a reduction in serum IgE and IL-5 synthesis in vitro 3 weeks post-treatment (p=0.07).
This study shows a trend toward significance for the effects of heat-killed Mycobacterium vaccae (SRL172) on allergen-induced airway responses. Further clinical trials, involving multiple dosing, are needed.

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Published date: 2003
Keywords: allergen challenge, asthma, interleukin-5, mycobacterium vaccae


Local EPrints ID: 26979
ISSN: 0903-1936
PURE UUID: b11aac92-8e67-491f-b8d5-0a5c6c990d39
ORCID for R. Djukanovic: ORCID iD

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Date deposited: 25 Apr 2006
Last modified: 17 Jul 2017 16:05

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Author: L. Camporota
Author: A. Corkhill
Author: H. Long
Author: J. Lordan
Author: L. Stanciu
Author: N. Tuckwell
Author: A. Cross
Author: J.L. Stanford
Author: G.A. Rook
Author: S.T. Holgate
Author: R. Djukanovic ORCID iD

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