Atopic Asthma Clinical Trial
Official title:
A Double-Blind Randomized Placebo Controlled Trial Investigating the Effects of DSM17938 on Capsaicin Evoked Coughs
Cough in asthma is a very common and troublesome symptom in asthma, which predicts severity and poor prognosis. Previous studies have shown that asthmatics have an exaggerated cough response to capsaicin. Currently available asthma treatment is not designed to target the cough reflex directly, so this presents an unmet need for patients. The treatment being tested in this study is the commercially available over the counter oral probiotic BioGaia® DSM17938. Based on clinical and pre-clinical evidence, it is hypothesized that TRPV1 antagonism with BioGaia® DSM17938 will result in a reduction in capsaicin evoked coughs in patients with asthma.
Visit 1: Baseline Screening and Beginning of Treatment Period 1 Subjects will undergo consent, complete history, physical examination, spirometry, capsaicin cough challenge, skin prick testing (allergen and histamine), methacholine challenge, induced sputum and blood sampling. Eligible subjects will then be randomized with matched oral BioGaia DSM17938 and placebo and will be given for the next 4 weeks. Visit 2: End of Treatment Period 1 Subjects will undergo spirometry, capsaicin cough challenge, skin prick testing, methacholine challenge, sputum induction and blood testing. Washout: 28 day washout period prior to Visit 3. Visit 3: Beginning of Treatment Period 2 Subjects wills undergo all the same tests performed in visit 2. Drug/Placebo will be given for the next 28 days. Visit 4: End of Treatment Period 2 Subjects will undergo all the same tests performed in visit 2. ;
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