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Wasp Venom Rush Immunotherapy Induces Transient Downregulation of B Cell Surface Molecule Expression.
- Source :
-
International Archives of Allergy & Immunology . 2002, Vol. 127 Issue 3, p226-233. 8p. - Publication Year :
- 2002
-
Abstract
- Background: Little is known about the involvement of B cells in venom immunotherapy (VIT). To elucidate changes in the B cell phenotype during this process, we examined the expression of several surface molecules on peripheral B cells before and during VIT. Methods: 15 venom-allergic patients with a history of systemic reactions after a wasp sting and venom-specific skin test reactivity as well as serum IgE were investigated before VIT (day 1), 1 day after reaching a maintenance dose of 100 μg (day 6) during inpatient rush VIT, and again on day 26 during continued outpatient maintenance therapy. Changes in the serum levels of total IgE, allergen-specific IgE (sIgE) and sIgG4 were measured by ELISA. Expression of several surface molecules on double-labelled B cells was studied by flow cytometry of peripheral blood mononuclear cells. Results: Levels of total IgE, sIgE and sIgG4 showed a significant increase after 26 days of VIT. On day 6, cell surface expression of HLA- II-DR, CD5, CD32 and CD54 was decreased in intensity and numbers of positive cells compared to day 1, while on day 26, expression of these molecules approached again baseline levels. Furthermore, a trend to decreased CD23 was noted on day 6. No changes were observed for CD40, CD86, CD95 and HLA-I-ABC. Conclusion: These data show that during initiation of rush VIT, B cell expression of surface molecules involved in T-B cell cooperation and antigen presentation is downmodulated. B cells may thus be additional direct or indirect targets of high-dose antigen therapy and contribute to the persistence of TH1 responses during maintenance VIT treatment.Copyright © 2002 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
- Subjects :
- *IMMUNOTHERAPY
*B cells
*WASPS
*ANTIGENS
*ALLERGIES
Subjects
Details
- Language :
- English
- ISSN :
- 10182438
- Volume :
- 127
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- International Archives of Allergy & Immunology
- Publication Type :
- Academic Journal
- Accession number :
- 11335079
- Full Text :
- https://doi.org/10.1159/000053867