Spots Global Cancer Trial Database for Treatment of Indolent Systemic Mastocytosis With PA101

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Trial Identification

Brief Title: Treatment of Indolent Systemic Mastocytosis With PA101

Official Title: Randomized, Double-blind, Placebo-controlled, Crossover Design, Efficacy and Safety Study With PA101 in Patients With Indolent Systemic Mastocytosis

Study ID: NCT02478957

Conditions

Mastocytosis

Systemic Mastocytosis

Indolent Systemic Mastocytosis

Interventions

PA101

Placebo

Study Description

Brief Summary: This is a randomized, placebo- and active-controlled, 2-period crossover, 2 cohort study in adult patients with indolent systemic mastocytosis (ISM). The purpose of the study is to determine the efficacy and safety profile of PA101 delivered via eFlow high efficiency nebulizer in patients with ISM who are symptomatic despite using standard treatments.

Detailed Description: The symptom scores for determining eligibility will be established during the 2-week Run-in Period using eDiary and the eligible patients will be randomly allocated in a 2:1 ratio to one of two treatment cohorts at the baseline visit. In Cohort 1 (n=24), patients will receive inhaled 40 mg PA101 three times daily and inhaled placebo three times daily via eFlow for 6 weeks each in a double-blind, 2-period crossover fashion with a 4-week washout period between the treatment periods. In Cohort 2 (n=12), patients will receive inhaled 40 mg PA101 three times daily via eFlow and oral cromolyn sodium 200 mg four times daily for 6 weeks each in an open label, 2-period crossover fashion with a 4-week washout period between the treatment periods. Patients will be allowed to use the same daily doses of pre-randomization H1 and H2 antihistamines as well as the same daily doses of any other allowed medications during each treatment period. Visits during each treatment period will occur at the baseline Visit, and at the end of Weeks 1, 2, 4, and 6. Blood and urine samples will be collected to test for various biomarkers. In a subset of patients, additional clinical assessments of the skin will be performed and blood samples will be collected for pharmacokinetic assessments. Clinical safety assessments will be performed in all patients at the start and end of each treatment period.