ORIGINAL ARTICLE/Clinical Mechanisms in Allergic Disease
Immunoglobulin G-dependent changes in basophil allergen threshold sensitivity during birch pollen immunotherapy
Article first published online: 31 MAY 2010
© 2010 Blackwell Publishing Ltd
Clinical & Experimental Allergy
Volume 40, Issue 8, pages 1186–1193, August 2010
How to Cite
Lalek, N., Kosnik, M., Silar, M. and Korosec, P. (2010), Immunoglobulin G-dependent changes in basophil allergen threshold sensitivity during birch pollen immunotherapy. Clinical & Experimental Allergy, 40: 1186–1193. doi: 10.1111/j.1365-2222.2010.03524.x
- Issue published online: 7 JUL 2010
- Article first published online: 31 MAY 2010
- Submitted 4 August 2009; revised 18 January 2010; accepted 25 March 2010
- basophil allergen threshold sensitivity;
- birch pollen subcutaneous immunotherapy;
- IgG antibodies
Background The effects of pollen immunotherapy on effector cells of allergic inflammation, such as mast cells and basophils, are poorly understood.
Objective For this reason, we conducted an open study on basophil allergen threshold sensitivity during birch pollen immunotherapy.
Methods Basophil sensitivity was measured by CD63 flow cytometry in 14 patients with moderate–severe intermittent birch pollen rhinitis using four log allergen concentrations. In nine patients, we analysed the basophil sensitivity before and during treatment with subcutaneous birch immunotherapy (perennial scheme with allergoid). We also included eight birch-allergic donor subjects for IgG inhibition experiments and eight control subjects.
Results There was a decrease in basophil allergen threshold sensitivity after 2, 3, and 5 months of immunotherapy. This decrease was correlated with an improvement in patients' symptoms measured on a visual analogue scale. The serum obtained after immunotherapy induced a significant decrease in allergen threshold sensitivity in donor birch-allergic basophils. This inhibition was not observed after IgG depletion from the serum.
Conclusions In this study, we showed that birch immunotherapy-induced IgG antibodies are associated with a reduction in basophil allergen threshold sensitivity. Further studies are needed to show whether the changes in basophil sensitivity are of clinical relevance in pollen immunotherapy.
Cite this as: N. Lalek, M. Kosnik, M. Silar and P. Korosec, Clinical & Experimental Allergy, 2010 (40) 1186–1193.