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An Open-Label, Non-Randomized Study to Assess the Safety and Efficacy of Leniolisib in Japanese Patients With Activated Phosphoinositide 3-Kinase Delta Syndrome (APDS) Followed By an Open-Label Long-Term Extension. For the treatment of activated phosphoinositide 3-kinase delta (PI3Kδ) syndrome (APDS).
Full description
This is a 2-part, open-label, non-randomized study to assess the safety and efficacy of leniolisib in Japanese patients with APDS. At least3 patients, aged 12 to 75 years (inclusive), will be enrolled. Patient eligibility will be assessed during a 7-week Screening Period (Day -50 to Day -1). This will be followed by a 12-week Treatment Period (Part 1), in which patients will be administered leniolisib doses ranging from 40 to 70 mg twice daily (BID) based on body weight (see dose regimen table below). A Part 1 clinical study report will be generated once the last patient completes the Day 85 Visit for Part 1. Patients who complete the Day 85 Visit will enter the Extension Period of the study (Part 2), in which patients will be administered leniolisib doses ranging from 40 to 70 mg BID (based on body weight) for 1 year or until marketing approval in Japan, whichever is longer. A 4-week Follow-up Period will occur after the last dose of study treatment is received. It is anticipated that a total of 3 patients will be enrolled into the study. Objectives: Part 1: Primary: To assess the safety and tolerability of leniolisib To assess the efficacy of leniolisib on lymphoproliferation (sum of product diameters [SPD] of index lymph node lesions) and immunophenotype normalization (percentage of naïve B cells out of total B cells) Secondary: To assess the efficacy of leniolisib on lymphoproliferation (non-index lymph node lesions and spleen) To assess the pharmacokinetics (PK) of leniolisib in the Japanese population To assess the efficacy of leniolisib to modify health-related quality of life To assess the efficacy of leniolisib by the Patient's and Physician's Global Assessments To assess the frequency of infections, antibiotic use, and immunoglobulin (Ig) replacement therapy and assessment of impact on other disease-related outcomes (e.g., cytopenia, colitis, and lung function) To assess biomarkers reflecting the efficacy of leniolisib to reduce systemic inflammatory components of the disease To assess the treatment benefit to individual patients Part 2: Primary: - To assess the long-term safety and tolerability of leniolisib Secondary: To assess the long-term efficacy of leniolisib to modify health-related quality of life To assess the long-term efficacy of leniolisib on lymphoproliferation (non-index lymph node lesions and spleen)
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Inclusion criteria
At Screening, patient has sitting vital signs (with patient rested for at least 3 minutes) within the following ranges:
Exclusion criteria
- Patient has previous or concurrent use of immunosuppressive medication such as the following:
A mammalian target of rapamycin inhibitor (e.g., sirolimus, rapamycin, or everolimus) or a PI3Kδ inhibitor (selective or non-selective phosphoinositide 3-kinase inhibitors) within 6 weeks prior to first dose.
- Short-term use for up to a total of 5 days is allowed but only up to 1 month prior to enrollment in the study.
B-cell depleters (e.g., rituximab) within 6 months prior to first dose of study treatment.
- If patient has received prior treatment with a B-cell depleter, absolute B lymphocyte counts in the blood must have regained normal values.
Other immunosuppressive medications where effects are expected to persist at start of dosing of study treatment.
Primary purpose
Allocation
Interventional model
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3 participants in 1 patient group
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Central trial contact
Elaine Cueto, MD; Jason Bradt, MD
Data sourced from clinicaltrials.gov
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