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Validation of Peptest™ for the Detection of Reflux in Cough

NCT03851393 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2019-07-15

No results posted yet for this study

Summary

Chronic cough is a common presenting problem which has a significant impact on quality of life. Gastro-oesophageal reflux (GOR) is a common cause of chronic cough and reflux of stomach contents into the airways has been implicated in the pathogenesis of a number of respiratory diseases. Clinical history in patients with suspected reflux can aid in the diagnosis but traditional investigations for GOR including 24hr oesophageal pH monitoring or endoscopy are not reliable diagnostic tools since the reflux may be non acidic.

The detection of pepsin in the sputum, saliva or bronchial biopsy has been found to be an accurate marker of reflux into the airways. Pepsin is solely produced by parietal cells in the stomach. The presence of pepsin in the upper airways therefore indicates reflux. Studies have demonstrated that pepsin was frequently found in laryngeal biopsies and sputum of patients with signs and symptoms of airways reflux and that Nissen fundoplication resulted in a decrease in pepsin detection alongside an improvement in symptoms. The Peptest™ lateral flow device has been shown to be effective in the detection of pepsin in sputum and saliva of patients with chronic cough and gastro-oesophageal reflux. The investigators have detected pepsin in expectorated saliva during episodes of cough, apparently supporting a diagnosis of airways reflux. Critics, however, have suggested that the act coughing itself is responsible for the reflux.

This study aims to identify if cough induced by inhaled citric acid in healthy adult volunteers leads to detectable pepsin in expectorated saliva.

Conditions

Interventions

OTHER

Induction of cough with inhaled citric acid

perform artificially induced cough by inhalation of citric acid at various strengths

PROCEDURE

Peptest™ analysis of saliva pepsin

collect patient saliva for analysis of pepsin levels

DIAGNOSTIC_TEST

Peptest™

The Peptest™ lateral flow device

Sponsors & Collaborators

  • Hull University Teaching Hospitals NHS Trust

    lead OTHER_GOV

Principal Investigators

  • Alyn Morice, MD, FRCP · Hull University Teaching Hospitals NHS Trust

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2014-08-31
Primary Completion
2014-10-31
Completion
2014-10-31

Countries

  • United Kingdom

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03851393 on ClinicalTrials.gov