Systemic effects of allergen exposure on blood basophil IL-13 secretion and FcεRIβ

Sarbjit S Saini, D. Candy Bloom, Anja Bieneman, Kavitha Vasagar, Alkis Togias, John Thomas Schroeder

Research output: Contribution to journalArticle

Abstract

Airway allergen challenge studies have shown the upregulation of cytokines in local airway tissues and distal effects on bone marrow precursors for eosinophils and basophils. We investigated whether local intranasal allergen challenge alters the phenotype of circulating basophils to a primed state. Ten subjects with allergic rhinitis were challenged with allergen by means of intranasal spray on 3 sequential days. Basophils were isolated from subjects before challenge and 3, 24, and 96 hours after the third allergen challenge. Basophils were compared before challenge and after the last allergen challenge for levels of FcεRIβ protein by means of Western blotting and for FcεRIβ mRNA expression by means of real-time PCR. Basophils were also compared with regard to spontaneous secretion of IL-4 and IL-13. Basophil FcεRIβ protein levels increased in 5 of 6 subjects after allergen challenge relative to before challenge. Likewise, basophil FcεRIβ mRNA levels increased a median of 2-fold after the last challenge relative to before challenge (P =. 007, n = 9). IL-13 protein was detected in supernatants of 7 of 9 subjects' basophil-enriched cultures after the last challenge compared with 3 of 9 basophil-enriched cultures before challenge (median, 6.2 vs 0 pg/mL; P =. 058). IL-4 was not detected in any culture supernatant. Intranasal allergen challenge transiently activates circulating basophils by increasing expression of the FcεRIβ subunit and spontaneous IL-13 secretion. Because FcεRIβ is an amplifier of FcεRI-mediated responses and IL-13 is proinflammatory, these findings support a primed basophil functional state and demonstrate a systemic effect of local allergen challenge that could contribute in exacerbating allergic reactions.

Original languageEnglish (US)
Pages (from-to)768-774
Number of pages7
JournalThe Journal of Allergy and Clinical Immunology
Volume114
Issue number4
DOIs
StatePublished - Oct 2004

Fingerprint

Interleukin-13
Basophils
Allergens
Interleukin-4
Messenger RNA
Proteins
Eosinophils
Real-Time Polymerase Chain Reaction
Hypersensitivity
Up-Regulation
Bone Marrow
Western Blotting
Cytokines
Phenotype

Keywords

  • allergen challenge
  • basophils
  • FcεRIβ
  • IgE receptors
  • IL-13

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Cite this

Systemic effects of allergen exposure on blood basophil IL-13 secretion and FcεRIβ. / Saini, Sarbjit S; Bloom, D. Candy; Bieneman, Anja; Vasagar, Kavitha; Togias, Alkis; Schroeder, John Thomas.

In: The Journal of Allergy and Clinical Immunology, Vol. 114, No. 4, 10.2004, p. 768-774.

Research output: Contribution to journalArticle

Saini, Sarbjit S ; Bloom, D. Candy ; Bieneman, Anja ; Vasagar, Kavitha ; Togias, Alkis ; Schroeder, John Thomas. / Systemic effects of allergen exposure on blood basophil IL-13 secretion and FcεRIβ. In: The Journal of Allergy and Clinical Immunology. 2004 ; Vol. 114, No. 4. pp. 768-774.
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