Hostname: page-component-6766d58669-zlvph Total loading time: 0 Render date: 2026-05-23T17:51:01.005Z Has data issue: false hasContentIssue false

Role of sphingosine 1-phosphate receptor expression in eosinophils of patients with allergic rhinitis, and effect of topical nasal steroid treatment on this receptor expression

Published online by Cambridge University Press:  23 September 2008

T Mackle*
Affiliation:
Department of Otorhinolaryngology, Beaumont Hospital, Dublin, Ireland
S S Gendy
Affiliation:
Department of Otorhinolaryngology, Beaumont Hospital, Dublin, Ireland
M Walsh
Affiliation:
Department of Otorhinolaryngology, Beaumont Hospital, Dublin, Ireland
R McConn-Walsh
Affiliation:
Department of Otorhinolaryngology, Beaumont Hospital, Dublin, Ireland
R W Costello
Affiliation:
Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
M-T Walsh
Affiliation:
Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
*
Address for correspondence: Dr Tara Mackle, Department of Otorhinolaryngology, Beaumont Hospital, Dublin 9, Ireland. E-mail: Mackle_tara@hotmail.com

Abstract

Objective:

Recent research has indicated that sphingosine 1-phosphate plays a role in allergy. This study examined the effect of allergen challenge on the expression of sphingosine 1-phosphate receptors on the eosinophils of allergic rhinitis patients, and the effect of steroid treatment on this expression.

Study design:

A prospective, non-randomised study.

Methods:

The study had three parts. Firstly, sphingosine 1-phosphate receptor expression on the eosinophils of allergic rhinitis patients and control patients was determined. Secondly, sphingosine 1-phosphate receptor expression was quantified pre- and post-allergen challenge, before and after a short course of fluticasone propionate; all patients underwent symptom scoring and peak nasal inspiratory flow measurement pre- and post-allergen challenge, both before and after steroid or saline treatment. Thirdly, the effect of sphingosine 1-phosphate on eosinophil migration was examined.

Results:

The eosinophils of both allergic rhinitis patients and controls expressed sphingosine 1-phosphate1, 3, 4, and 5. Eosinophils from all allergic rhinitis patients demonstrated up-regulation in sphingosine 1-phosphate expression after allergen challenge. These changes were statistically very significant for sphingosine 1-phosphate1, 4, and 5, and moderately significant for sphingosine 1-phosphate3. Sphingosine 1-phosphate receptor expression up-regulation was abolished in the steroid-treated group after allergen challenge; however, the saline-treated group showed no change in sphingosine 1-phosphate receptor expression after allergen challenge. Peak nasal inspiratory flow scores were significantly diminished after allergen challenge prior to treatment, but not after a course of topical nasal steroids. Sphingosine 1-phosphate induced eosinophil chemotaxis was increased following allergen challenge in allergic rhinitis subjects.

Conclusions:

Local intranasal steroid therapy acts directly to block allergen-induced up-regulation of sphingosine 1-phosphate receptors on the peripheral eosinophils of allergic rhinitis patients, and this is coincident with post-challenge peak nasal inspiratory flow measurement improvements. These observations support the idea that such an increase in sphingosine 1-phosphate receptor expression is clinically relevant in allergic rhinitis, with potential consequences for eosinophil migration and survival.

Information

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable