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Montelukast and Nasal Epithelial Cell Inflammatory Responses in Asthma and Rhinitis

2010年10月28日更新者：University of Aberdeen

The Effect of Montelukast on Inflammatory Responses of Nasal Epithelial Cells Cultured From Patients With Asthma, With and Without Concomitant Allergic Rhinitis

The airways of the lung are lined by specialised cells called airway epithelial cells. As well as being at the interface between the lungs and the air we breathe; airway epithelial cell (AEC) function is altered in people with respiratory diseases such as asthma. AEC secrete many mediators that contribute to asthma symptoms and these also contribute to asthmatic inflammation in the lungs. The study of such cells is difficult because of their location deep in the lungs. Nasal airway epithelial cells provide a useful and easily accessible model of model of lower airway cells. This study will examine whether the asthma medication Singulair (montelukast) can inhibit the inflammatory secretions of nasal AEC of asthmatic patents who also have allergic rhinitis compared with patients who have asthma alone. We will also examine if montelukast has differential modulating effects in these two patient groups.

研究概览

地位

未知

条件

详细说明

Hypothesis

The inflammatory secretory profile of nasal airway epithelial cells (NEC) cultured from asthmatics with concomitant allergic rhinitis (AR) will differ from that of NEC from patients with asthma alone. Treatment (in vitro and in vivo) with montelukast may have differential modulating effects in these two patient groups.

For the primary objective of this proposal we will use nasal AEC from asthmatics with or without concomitant AR as to ascertain differences in pro-inflammatory cytokine and chemokine production between these two groups and determine whether in vitro treatment with montelukast has a differential modulating effect on NEC secretion. In the secondary pilot study any modulating effects by montelukast on AEC secretion in vitro will be correlated with any in vivo response to montelukast withdrawal. This sub study will provide pilot data indicating whether in vivo response to montelukast can be predicted from in vitro effects on NEC.

研究类型

观察性的

注册 (预期的)

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习地点

英国
- - Aberdeen、英国、AB25 2ZD
    - University of Aberdeen

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

10年至 60年 (孩子、成人)

接受健康志愿者

不

有资格学习的性别

全部

取样方法

非概率样本

研究人群

For the primary study the investigators will identify 40 patients (aged 10-60) with with stable physician confirmed mild/moderate asthma (Steps 1-4 of BTS/SIGN guidelines [3]) with <10 pack-year smoking histories. Twenty of the subjects will have asthma and concomitant allergic rhinitis (asthma/AR) and 20 will have asthma alone.

描述

Inclusion Criteria:

stable physician confirmed mild/moderate asthma (Steps 1-4 of BTS/SIGN guidelines <10 pack-year smoking histories Currently taking montelukast with a documented clinical history of benefit

Exclusion Criteria:

Nasal corticosteroid therapy

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

团体/队列数

队列和干预

团体/队列
asthmatic patients taking montelukast asthma with or without rhinitis

研究衡量的是什么？

主要结果指标

结果测量	措施说明	大体时间
Effect of montelukast on nasal epithelial cell secretion in vitro. 大体时间：12 months	Nasal AEC will be cultured from 20 patients with asthma and 20 patients with asthma and concomitant allergic rhinitis. Unstimulated, TNFα (a surrogate for viral infection, a well known trigger of exacerbations) or allergen stimulated secretion of IL-6, IL-10, INFgamma TGFbeta, GM-CSF, eotaxin 1 & 2, RANTES and IL-8 by NEC will be measured. The in vitro inhibitory effects of a concentration range (10-6M to 10-10M) of montelukast will be assessed.	12 months

次要结果测量

结果测量	措施说明	大体时间
Effect of 1-week montelukast withdrawal on clinical scores and pro-inflammatory cytokine output by nasal epithelial cells 大体时间：12 months	The secondary outcome of the study will be to examine the effect of withdrawal montelukast for 1-week on clinical scores and pro-inflammatory cytokine/ chemokine secretion by cultured NEC in montelukast-responsive patients with asthma (20 subjects) and asthma/AR (20 subjects). The clinical scores and NEC secretory responses in these patients following montelukast withdrawal will be compared with the responses generated in the primary study i.e., while taking montelukast.	12 months

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

University of Aberdeen

合作者

Merck Sharp & Dohme LLC

调查人员

首席研究员：Garry M Walsh, PhD、University of Aberdeen

出版物和有用的链接

负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。

一般刊物

McDougall CM, Blaylock MG, Douglas JG, Brooker RJ, Helms PJ, Walsh GM. Nasal epithelial cells as surrogates for bronchial epithelial cells in airway inflammation studies. Am J Respir Cell Mol Biol. 2008 Nov;39(5):560-8. doi: 10.1165/rcmb.2007-0325OC. Epub 2008 May 15.

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始

2011年1月1日

初级完成 (预期的)

2011年12月1日

研究完成 (预期的)

2011年12月1日

研究注册日期

首次提交

2010年10月27日

首先提交符合 QC 标准的

2010年10月28日

首次发布 (估计)

2010年10月29日

研究记录更新

最后更新发布 (估计)

2010年10月29日

上次提交的符合 QC 标准的更新