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Effect of long-term, low-dose clarithromycin on T helper 2 cytokines, eosinophilic cationic protein and the ‘regulated on activation, normal T cell expressed and secreted’ chemokine in the nasal secretions of patients with nasal polyposis

Published online by Cambridge University Press:  04 May 2012

A Perić*
Affiliation:
Rhinology Unit, Department of Otorhinolaryngology, Military Medical Academy, Belgrade, Serbia
D Vojvodić
Affiliation:
Division of Clinical Immunology, Institute of Medical Research, Military Medical Academy, Belgrade, Serbia
S Matković-Jožin
Affiliation:
Department of Ear, Nose and Throat, Innland Hospital, Elverum, Norway
*
Address for correspondence: Dr Aleksandar Perić, Rhinology Unit, Department of Otorhinolaryngology, Military Medical Academy, Crnotravska 17, 11040 Belgrade, Serbia E-mail: alexneta@sezampro.rs

Abstract

Background:

Little is known about the effects of macrolides on the cytokines and chemokines that modulate the function of eosinophils in nasal polyposis.

Methods:

Twenty-two non-allergic and 18 allergic patients with nasal polyps were administered clarithromycin 500 mg/day (single oral dose) for eight weeks. We measured the nasal secretion levels of the T helper 2 (also known as Th2) cytokines interleukin 4, 5 and 6, the ‘regulated on activation, normal T cell expressed and secreted’ (also known as RANTES) chemokine, and the eosinophilic cationic protein, before and after treatment.

Results:

After clarithromycin treatment, we found reduced levels of the ‘regulated on activation, normal T cell expressed and secreted’ chemokine in samples from both non-allergic and allergic patients (p < 0.05). Clarithromycin treatment decreased the levels of eosinophilic cationic protein only in non-allergic patients (p < 0.05), and decreased the level of interleukin 6 only in allergic patients (p < 0.05). Decreased levels of the ‘regulated on activation, normal T cell expressed and secreted’ chemokine were associated with a reduction in polyp size both in non-allergic and allergic patients.

Conclusion:

Clarithromycin has a strong anti-inflammatory effect in nasal polyposis, but has different immunomodulatory effects in allergic and non-allergic nasal polyposis patients.

Information

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 2012

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