Functional analysis of the chemokine receptor CCR3 on airway epithelial cells

Lisa A. Beck, Brian Tancowny, Mary E. Brummet, S. Yukiko Asaki, Stephanie L. Curry, Margaret B. Penno, Martyn Foster, Ash Bahl, Cristiana Stellato

Research output: Contribution to journalArticle

Abstract

The function of chemokine receptors on structural cells is only partially known. We previously reported the expression of a functional CCR3 receptor on airway epithelial cells (EC). We speculated that CCR3 might drive wound repair and expression of inflammatory genes in epithelium. The human airway EC lines BEAS-2B, 16-HBE, and primary bronchial EC were used to test the effect of in vitro challenge with the CCR3 ligands CCL11/eotaxin, CCL24/eotaxin-2, or CCL26/eotaxin-3 on 1) wound repair, using an established wound model; 2) cell proliferation and chemotaxis, using specific fluorometric assays; and 3) gene expression, using pathway-specific arrays for inflammatory and profibrotic cytokines, chemokines, and chemokine receptor genes. Agonist specificity was tested by cell pretreatment with an AstraZeneca CCR3 antagonist (10-8 - 10-6 M). CCL24 challenge significantly accelerated epithelial wound closure, with similar effects exerted by CCL11 and CCL26. This effect was time dependent, sub-maximal at 1 nM, and comparable in potency to epidermal growth factor. CCL24 induced a concentration-dependent increase in EC proliferation and chemotaxis, with significant effects observed at 10 nM. The AstraZeneca compound selectively inhibited these CCL24-mediated responses. CCL11 induced the up-regulation of several profibrogenic molecules such as fibroblast growth factor 1 and 5 and of several CC and CXC chemokines. Epithelial immunostaining for CCR3 was stronger in bronchial biopsies of asthmatics displaying marked inflammatory changes than in nondiseased samples. Epithelial CCR3 participates in key functions for wound repair, amplifies the expression of profibrogenic and chemokine transcripts, and appears up-regulated in inflamed asthmatic airways.

Original languageEnglish (US)
Pages (from-to)3344-3354
Number of pages11
JournalJournal of Immunology
Volume177
Issue number5
DOIs
StatePublished - Sep 1 2006

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Fingerprint Dive into the research topics of 'Functional analysis of the chemokine receptor CCR3 on airway epithelial cells'. Together they form a unique fingerprint.

  • Cite this

    Beck, L. A., Tancowny, B., Brummet, M. E., Asaki, S. Y., Curry, S. L., Penno, M. B., Foster, M., Bahl, A., & Stellato, C. (2006). Functional analysis of the chemokine receptor CCR3 on airway epithelial cells. Journal of Immunology, 177(5), 3344-3354. https://doi.org/10.4049/jimmunol.177.5.3344