由非酸性胃食管反流导致的慢性咳嗽患者的咳嗽反射敏感性和气道炎症
2011/07/06
摘要
背景与目的:本研究旨在探寻非酸反流导致的慢性咳嗽的致病机制。
方法:7名非酸性反流的慢性咳嗽患者、12名酸反流性慢性咳嗽患者和10名无咳嗽的胃食管反流症患者及12名健康志愿者入选本研究。所有参与者均接受食管多通道腔内阻抗测量和pH检测,对辣椒素的咳嗽反射敏感性和诱导痰液的细胞学进行评价。诱导痰液中的物质P的浓度、肥大细胞类胰蛋白酶、前列腺素D2和组织胺通过ELISA检测。
结果:咳嗽阈值C2和C5在非酸反流和酸反流慢性咳嗽患者之间无显著差异,但上述阈值显著低于无咳嗽的胃食管反流病患者和健康志愿者。非酸反流性慢性咳嗽患者,其轻微酸反流出现的频率,显著高于其他三组。慢性咳嗽患者的诱导痰液中物质P和肥大细胞类胰蛋白酶含量显著增加,但非酸反流和酸反流患者相似。非酸反流和酸性反流的慢性咳嗽患者中,物质P水平和咳嗽阈值C2和C5之间存在负相关,酸性反流慢性咳嗽患者肥大细胞类胰蛋白酶水平和咳嗽阈值C2之间存在负相关。
结论:非酸反流性慢性咳嗽与神经源性炎症和肥大细胞活化导致的咳嗽反射超敏相关,轻微的酸反流可能是导致后者的一个重要原因。
(陈欣 审校)
Respirology. 2011 May;16(4):645-52. doi: 10.1111/j.1440-1843.2011.01952.x.
Cough reflex sensitivity and airway inflammation in patients with chronic cough due to non-acid gastro-oesophageal reflux.
Qiu Z, Yu L, Xu S, Liu B, Zhao T, Lü H, Qiu Z.
Source
Departments of Respiratory Medicine Gastroenterology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China.
Abstract
BACKGROUND AND OBJECTIVE: The aim of this study was to explore the pathogenesis of chronic cough caused by non-acid reflux.
METHODS:Seven patients with chronic cough due to non-acid reflux, 12 patients with chronic cough due to acid reflux, 10 patients with gastro-oesophageal reflux disease without cough and 12 healthy volunteers were recruited for the study. All subjects underwent oesophageal multi-channel intraluminal impedance measurements combined with pH monitoring, and assessment of cough reflex sensitivity to capsaicin and induced sputum cytology. The concentrations of substance P, mast cell tryptase, prostaglandin D2 and histamine in induced sputum were measured by ELISA.
RESULTS: Cough threshold C2 and C5 did not differ between patients with chronic cough due to non-acid or acid reflux, but the values were significantly lower than those for patients with gastro-oesophageal reflux disease without cough and healthy volunteers. Weakly acidic reflux episodes were obviously more frequent in patients with chronic cough due to non-acid reflux than in the other three groups. Sputum substance P and mast cell tryptase concentrations were remarkably increased in patients with chronic cough, but were similar for those with cough due to non-acid or acid reflux. There were significant inverse correlations between substance P levels and cough threshold C2 or C5 in patients with cough due to non-acid or acid reflux, and between mast cell tryptase levels and cough threshold C2 in patients with cough due to acid reflux.
CONCLUSIONS:Chronic cough due to non-acid reflux may be related to cough reflex hypersensitivity caused by neurogenic airway inflammation and mast cell activation, in which weakly acidic reflux is possibly a major factor.
Respirology. 2011 May;16(4):645-52. doi: 10.1111/j.1440-1843.2011.01952.x.
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