Abstract
Background: Anti-peanut immunoglobulin E (anti-Pn IgE) can persist throughout life, suggesting that this condition could be maintained by long-lived antibody-secreting cells (ASCs). To determine the role of long-lived ASCs, peanut-allergic mice underwent prolonged treatment with the proteasome inhibitor, bortezomib (Bz). Methods: Intravenous Bz was given twice weekly for 21 weeks to peanut-allergic mice. During treatment, serum anti-Pn IgE was measured, and the mice were rechallenged at the end of treatment. Cell populations were measured, and Pn-specific IgG, total IgG, and total IgE ASCs were enumerated in the bone marrow (BM) and spleen (SPL). Results: Prolonged treatment with Bz significantly reduced serum anti-Pn IgE and IgG1 but did not affect symptoms following challenge with Pn, even in mice with undetectable serum anti-Pn IgE. Numbers of CD138+ cells were significantly reduced in the BM but were unaffected in the SPL. Unexpectedly, Bz did not affect numbers of Pn-specific IgG, total IgG, or total IgE ASCs in either the BM or SPL. Conclusions: Cells that maintain long-lived serum anti-Pn IgE are sensitive to Bz. However, prolonged depletion of serum Pn-specific IgE does not result in a decrease of symptoms following challenge with Pn.
Original language | English (US) |
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Pages (from-to) | 257-261 |
Number of pages | 5 |
Journal | International Archives of Allergy and Immunology |
Volume | 170 |
Issue number | 4 |
DOIs | |
State | Published - Nov 1 2016 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 S. Karger AG, Basel. Copyright: All rights reserved.
Keywords
- Anaphylaxis
- Antibody-secreting cell
- Immunoglobulin E
- Mast cell
- Proteasome inhibitor