Edited by: Hans-Uwe Simon
Basophil response and the induction of a tolerance in venom immunotherapy: a long-term sting challenge study
Version of Record online: 3 APR 2012
© 2012 John Wiley & Sons A/S
Volume 67, Issue 6, pages 822–830, June 2012
How to Cite
Eržen R, Košnik M, Šilar M, Korošec P. Basophil response and the induction of a tolerance in venom immunotherapy: a long-term sting challenge study. Allergy 2012; 67: 822–830.
- Issue online: 10 MAY 2012
- Version of Record online: 3 APR 2012
- Manuscript Accepted: 23 FEB 2012
- basophil CD63 response;
- Hymenoptera allergy;
- immune tolerance;
- sting challenge;
- venom immunotherapy
There is no in vitro test to predict the induction of long-term tolerance in patients treated with venom immunotherapy (VIT). The aim of this study was to investigate whether immunotherapy-induced changes in basophil responsiveness reflect a state of protection and the induction of a tolerance.
Twenty-three patients with allergic reaction after Hymenoptera sting (11 wasp and 12 honeybee) were treated with VIT. In all patients, a CD63 basophil activation test was performed before the beginning of immunotherapy, after 1 year and after completing 4–6.5 years of immunotherapy (approximately 1 year after stopping). The tolerance was then evaluated by a sting challenge test. The basophil activation test was repeated 3–6 months after the challenge.
Twenty-two subjects showed a negative sting challenge, and one subject, a positive sting challenge. Allergen-specific basophil response remained unchanged after 1 year of immunotherapy. However, after immunotherapy, a significant and approximately fourfold decrease was demonstrated in all tolerant subjects mainly in response to submaximal 0.1 μg/ml allergen concentration. This depression was sustained and did not change with the sting challenge test. In a nontolerant patient with a positive sting challenge, basophil response did not change.
Our results suggest that the depression of allergen-specific basophil response seems to be associated with the induction of a tolerance after completing a course of VIT.