Neuroinflammatory Interactions of ATP and P2X3 Receptor in the Airways of Chronic Cough Patients
This study is being done in order to understand what causes people to have a chronic cough, which is defined as a cough lasting for more than 8 weeks. The research team wish to find out whether there is any inflammation in the lungs of patients with chronic cough. The research team will also determine whether a suspected chemical produced in the body, called adenosine triphosphate (ATP) can be responsible for causing the chronic cough. In order to be able to find out what is abnormal in those who have a chronic cough, The research team will need to compare their results with those that do not have a chronic cough.

In this study, the research team will examine 10 participants who suffer from chronic cough and 8 individuals who do not have a chronic cough and are healthy.
- EligibilityCriteria: Inclusion Criteria:  - 1. For Normal non-smoking subject: Healthy individuals, free of significant disease No history of asthma/rhinitis, No therapies, Baseline FEV1 ≥80% predicted with FEV1/FVC ratio >70% Non-smoker for at least the past 12 months with a pack history of ≤5 pack-years  2. For chronic cough participants: History of chronic cough of at least 8 weeks' duration and should have been followed in the Cough Clinic for at least 6 months.  Undergone a protocol with a diagnostic pathway as recommended by the ERS guidelines for management of cough.  Would have either an identifiable cause for their cough that have failed therapies targeted towards the identified cause or classed as having chronic idiopathic cough where no identifiable cause has been found.  3. General Inclusion Criteria: Give written informed consent prior to participation in the study including all of its procedures. Comply with the requirements and restrictions listed in the consent form.  Male or female subject aged between 30 and 70 years old at screening. Able to complete the study and all measurements. Able to read, comprehend, and write at a sufficient level to complete study related materials.  Exclusion Criteria:  - - HealthyVolunteers: Accepts Healthy Volunteers - Gender: All - MinimumAge: 30 Years - MaximumAge: 70 Years - StdAgeList: Adult, Older Adult - StudyPopulation: Patients who suffer from chronic cough and healthy volunteers - SamplingMethod: Non-Probability Sample