Article (Scientific journals)
Novel association between vasoactive intestinal peptide and CRTH2 receptor in recruiting eosinophils: a possible biochemical mechanism for allergic eosinophilic inflammation of the airways.
EL SHAZLY, Amr; Begon, Dominique; KUSTERMANS, Gaëlle et al.
2013In Journal of Biological Chemistry, 288 (2), p. 1374-84
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Abstract :
[en] We explored the relation between vasoactive intestinal peptide (VIP), CRTH2, and eosinophil recruitment. It is shown that CRTH2 expression by eosinophils from allergic rhinitis (AR) patients and eosinophils cell line (Eol-1 cells) was up-regulated by VIP treatment. This was functional and resulted into exaggerated migratory response of cells against PGD2. Nasal challenge of AR patients resulted into significant increase of VIP contents in nasal secretion (ELISA), and the immunohistochemical studies of allergic nasal tissues, showed significant expression of VIP in association with intense eosinophil recruitment. Biochemical assays showed that VIP-induced eosinophils chemotaxis from AR patients and Eol-1 cells, was mediated through CRTH2 receptor. Cells migration against VIP was sensitive to protein kinase C (PKC) and protein kinase A (PKA) inhibition, but not to tyrosine kinase or P38 MAP-kinase inhibition, or calcium chelation. Western blot demonstrated a novel CRTH2 mediated cytosol to membrane translocation of PKC-epsilon, PKC-delta and PKA-alpha, gamma and IIalpha reg in Eol-1 cells upon stimulation with VIP. Confocal images and FACS demonstrated a strong association and co-localization between VIP peptide and CRTH2 molecules. Further, VIP induced PGD2 secretion from eosinophils. Our results demonstrate the first evidence of association between VIP and CRTH2 in recruiting eosinophils.
Disciplines :
Immunology & infectious disease
Author, co-author :
EL SHAZLY, Amr ;  Centre Hospitalier Universitaire de Liège - CHU > O.R.L.
Begon, Dominique ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques
KUSTERMANS, Gaëlle ;  Centre Hospitalier Universitaire de Liège - CHU > Anatomie pathologique
Arafa, Mohamad
Dortu, Estelle
HENKET, Monique ;  Centre Hospitalier Universitaire de Liège - CHU > Pneumologie-Allergologie
Lefèbvre, Philippe ;  Université de Liège - ULiège > Département des sciences cliniques > Oto-rhino-laryngologie et audiophonologie
Louis, Renaud ;  Université de Liège - ULiège > Département des sciences cliniques > Pneumologie - Allergologie
Delvenne, Philippe ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques
Language :
English
Title :
Novel association between vasoactive intestinal peptide and CRTH2 receptor in recruiting eosinophils: a possible biochemical mechanism for allergic eosinophilic inflammation of the airways.
Publication date :
2013
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
eISSN :
1083-351X
Publisher :
American Society for Biochemistry and Molecular Biology, United States - Maryland
Volume :
288
Issue :
2
Pages :
1374-84
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 November 2012

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