E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Activated Phosphoinositide 3-Kinase Delta Syndrome |
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E.1.1.1 | Medical condition in easily understood language |
APDS (Activated Phosphoinositide 3-Kinase Delta Syndrome) is a rare disease caused by genetic variations in either the PIK3CD gene or the PIK3R1 gene |
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E.1.1.2 | Therapeutic area | Diseases [C] - Immune System Diseases [C20] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10078281 |
E.1.2 | Term | Activated PI3 kinase delta syndrome |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |
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E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
Part I: • To assess the clinical safety and tolerability of leniolisib in pediatric patients (aged 4 to 11 years) with APDS • To assess the efficacy of leniolisib in pediatric patients (aged 4 to 11 years) with APDS
Part II: • To assess the long-term clinical safety and tolerability of leniolisib in pediatric patients (aged 4 to 11 years) with APDS |
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E.2.2 | Secondary objectives of the trial |
Part I: • To assess the pharmacokinetics (PK) of leniolisib in pediatric patients (aged 4 to 11 years) with APDS • To evaluate control of infectious complications of the disease • To evaluate changes in mammalian target of rapamycin (mTOR) pathway pharmacodynamics (PDx) parameters
Part II: • To assess impact on lymphadenopathy (non-index lesions and spleen) • To evaluate long-term control of infectious complications of the disease. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
• Patient is male or female and between the age of 4 to 11 years old at time of the first study procedure. Females should be of nonchildbearing potential at screening. • Patient weighs ≥13 kg and <45 kg at baseline. • Patient has confirmed PI3Kδ genetic mutation of either the PIK3CD (APDS1) or PIK3R1 (APDS2) gene. • Patient has at least 1 measurable nodal lesion on magnetic resonance imaging (MRI)/low-dose computed tomography (CT). • Patient has nodal or extranodal lymphoproliferation and clinical findings consistent with APDS (eg, a history of repeated oto-sino-pulmonary infections and/or organ dysfunction consistent with APDS). • Patient has the ability to ingest unaltered study-related medications without difficulty.
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E.4 | Principal exclusion criteria |
• Patient has previous or concurrent use of immunosuppressive medication such as: a. An mTOR inhibitor (eg, sirolimus, rapamycin, everolimus) or a PI3Kδ inhibitor (selective or non-selective PI3K inhibitors) within 6 weeks prior to first dose. i. 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. B cell depleters (eg, rituximab) within 6 months prior to first dose of study medication. i. If patient has received prior treatment with a B cell depleter, absolute B lymphocyte counts in the blood must have regained normal values. c. Belimumab or cyclophosphamide within 6 months prior to first dose of study medication. d. Cyclosporine A, mycophenolate, 6-mercaptopurine, azathioprine, or methotrexate within 3 months prior to first dose of study medication. e. Systemic glucocorticoids above a dose equivalent to either ≥2 mg/kg of body weight or ≥20 mg/day of prednisone/prednisolone or equivalent. f. Other immunosuppressive medication where effects are expected to persist at start of dosing of study medication. • Patient has a history or current diagnosis of electrocardiogram (ECG) abnormalities indicating significant risk of safety for patients participating in the study such as: a. History of familial long QT syndrome or known family history of Torsades de Pointes. b. Concomitant clinically significant cardiac arrhythmias, eg, sustained ventricular tachycardia, and clinically significant second or third degree atrioventricular block without a pacemaker. c. Resting QTc (Fridericia preferred, but Bazett acceptable) >460 msec if the measurement is confirmed with an additional ECG repeated as soon as possible. d. Concomitant use of agents known to prolong the QT interval unless it can be permanently discontinued for the duration of the study. • Patient is currently using a medication known to be strong inhibitor or moderate or strong inducer of isoenzyme CYP3A (see Table 2), if treatment cannot be discontinued or switched to a different medication prior to starting study treatment. • Patient is currently using medications that are metabolized by isoenzyme CYP1A2 and have a narrow therapeutic index (drugs whose exposure- response indicates that increases in their exposure levels by the concomitant use of potent inhibitors may lead to serious safety concerns [eg, Torsades de Pointes]).
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E.5 End points |
E.5.1 | Primary end point(s) |
Part I: • Incidence of treatment-emergent AEs (TEAEs), SAEs, and AEs leading to discontinuation of study drug • Change from baseline in clinical laboratory test results (hematology, blood chemistry, urinalysis) • Change from baseline in vital signs • Change from baseline in physical examination findings • Change from baseline in electrocardiograms (ECGs) • Change from baseline in growth and physical development • Reduction in lymphadenopathy as measured by MRI or low-dose CT at end of 12 weeks of treatment • Immunophenotype assessed by changes from baseline in the percentage of naïve B cells to total B cells to end of 12 weeks of treatment
Part II: • All safety parameters (including TEAEs, SAEs, AEs leading to discontinuation of study drug, physical exam, vital signs, ECGs, growth and physical development, and clinical laboratory results)
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Part I: • Incidence of TEAEs, SAEs, AEs, safety laboratory tests and vital signs at all visits • Physical Examination of at Screening/Visit 1, Visit 2, Visit 6, Early Treatment D/C and EoS visit • Tanner Staging at Screening/Visit 1 and Visit 6 • EGC at Visit 2, Visit 4, Visit 6 and EoS Visit • Height at Visit 2, Visit 6, Early Treatment D/C • MRI / CT-scan at screening, if not available within 6 months, at Visit 6 and/or Early Treatment D/C • Immunophenotyping at Visit 2, Visit 4, Visit 5 and Visit 6
Part II: • Incidence of TEAEs, SAEs, AEs, safety laboratory tests and vital signs at all visits • Physical Examination at V10/EOT, Early Treatment D/C • Tanner Staging at V10/EOT Visit • EGC at V7, V8, V9, V10 and EoS visit • Height at V10, Early Treatment D/C
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E.5.2 | Secondary end point(s) |
Part I: • Population pharmacokinetics (popPK) model that describes the appropriate covariates (eg, body weight and age) that influence leniolisib PK in pediatric patients (from baseline to end of 12 weeks of treatment) • Frequency of infections, use of antibiotics, and immunoglobulin replacement therapy • pAKT and pS6 inhibition in whole blood
Part II: • Reduction in lymphadenopathy as measured by MRI or low-dose CT at 1 year, as measured by 3D volume of index and measurable non-index lesions selected as per the Cheson methodology, 3D volume and 3D sizes of spleen and liver, where appropriate • Incidence of infections, use of antibiotics, and use of immunoglobulin replacement therapy
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Part I: • PK samples at Visit 2, Visit 4 and Visit 6 -up to 4 blood samples will be collected on any 1 day during the 12-week period, according to randomized assignment to 1 of 3 PK sampling groups • Frequency of infections, use of antibiotics, and immunoglobulin replacement therapy at all study visit • Soluble biomarkers at Screening/Visit 1 and Visit 6
Part II: • Frequency of infections, use of antibiotics, and immunoglobulin replacement therapy at all study visit • MRI, CT-scan at Visit 8, Visit 10/EOT visit and Early Treatment D/C
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | No |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 2 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Japan |
United States |
France |
Netherlands |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 1 |
E.8.9.1 | In the Member State concerned months | 7 |
E.8.9.1 | In the Member State concerned days | 26 |
E.8.9.2 | In all countries concerned by the trial years | 1 |
E.8.9.2 | In all countries concerned by the trial months | 10 |
E.8.9.2 | In all countries concerned by the trial days | 29 |