Study of Leniolisib in Pediatric Patients (Aged 4 to 11 Years) with APDS (Activated Phosphoinositide 3-Kinase Delta Syndrome)

Overview

Sponsor-declared trial summary

Key facts

Sponsor

Pharming Technologies B.V.

Participant type

Pediatric, Patients

Age range

0-17 years

Gender

Male and Female

Therapeutic area

Diseases [C] - Immune System Diseases [C20]

Trial duration

6 Sep 2023 → 3 Jun 2025

Decision date (initial)

2024-10-01

Transition trial

Yes

Low-intervention

No

Rare-disease indication

Yes

Vulnerable population

Yes

Funding sources

Pharming Technologies B.V.

External identifiers

EU CT number

2024-515489-15-00

EudraCT number

2022-001624-14

ClinicalTrials.gov

NCT05438407

Trial design

CTIS Part I — objectives, methods, condition coding

Main objective

Scope: Pharmacodynamic, Pharmacokinetic, Efficacy, Safety, Therapy

Part I:
• To assess the clinical safety and tolerability of leniolisib in pediatric patients (aged 4 to 11 years) with activated phosphoinositide 3-kinase delta (PI3Kδ) syndrome (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.

Secondary objectives 4

1. Part I: • To assess the pharmacokinetics (PK) of leniolisib in pediatric patients (aged 4 to 11 years) with APDS
2. Part I: • To evaluate control of infectious complications of the disease in pediatric patients (aged 4 to 11 years) with APDS
3. Part II: • To assess impact on lymphoproliferation (index-, non-index lesions and spleen)
4. Part II: • To evaluate long-term control of infectious complications of the disease.

Conditions and MedDRA coding

Activated Phosphoinositide 3-Kinase Delta Syndrome

Study design 3 periods

Regulatory references

Scientific advice from competent authorities

Food And Drug Administration, Pharmaceuticals And Medical Devices Agency

EMA paediatric investigation plan (PIP)

EMEA-002989-PIP01-21

Plan to share IPD

No

Eligibility criteria

Principal inclusion / exclusion criteria as submitted by sponsor

Inclusion criteria 12

1. Patient is male or female and between the age of 4 to 11 years old at the time of the first study procedure.
2. Patient weighs ≥13 kg and <45 kg at baseline.
3. Patient has a confirmed PI3Kδ genetic mutation of either the PIK3CD (APDS1) or PIK3R1 (APDS2) gene.
4. Patient has at least 1 measurable nodal lesion on magnetic resonance imaging/low-dose computed tomography within 6 months of screening.
5. Patient has nodal or extranodal lymphoproliferation and clinical findings consistent with APDS (e.g, a history of repeated oto-sinopulmonary infections and/or organ dysfunction consistent with APDS).
6. Patient has the ability to ingest unaltered study-related medications without difficulty in the investigator's opinion.
7. At screening, vital signs (systolic blood pressure [BP], diastolic BP, and pulse rate) will be assessed in the sitting position after the patient has been at rest for at least 3 minutes. Patient's sitting vital signs should be within the following ranges: • Systolic BP: Less than the 95th percentile adjusted for sex, age, and height percentile. • Diastolic BP: Less than the 95th percentile adjusted for sex, age, and height percentile. • Heart rate (HR): i) Age 4 to <10 years: 60 to 140 bpm ii) Age ≥10 years: 50 to 100 bpm
8. Institutional review board-/independent ethics committee-approved written informed consent/assent and privacy language as per national and local regulations must be obtained from the patient and parent/legal guardian prior to any study-related procedures.
9. Patient parent/legal guardian is willing and able to complete the informed consent/assent process and comply with study procedures and visit schedule.
10. Patient parent/legal guardian agrees patient will not participate in any other interventional study while enrolled in this study.
11. Female patients should be of non-childbearing potential at screening (should not have reached menarche). Male patients with partners of childbearing potential should be willing to use a highly effective method of contraception for at least 30 days after the last study procedure if at risk of pregnancy.
12. Female patient and parent/legal guardian must agree to the following if menses develops after screening, up to 30 days after the last study procedure: • True sexual abstinence defined as refraining from heterosexual activity during the entire period of the study through 6 months post-study or • Using a highly effective method of contraception for at least 30 days after the last study procedure if at risk of pregnancy.

Exclusion criteria 24

1. Patient has previous or concurrent use of immunosuppressive medication such as: a. An mTOR inhibitor (e.g, sirolimus, rapamycin, everolimus) or a PI3Kδ inhibitor (selective or non selective PI3K inhibitors) within 6 weeks prior to first dose. b. B cell depleters (e.g, rituximab) within 6 months prior to first dose of study medication. 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.
2. Patient has a history or current diagnosis of electrocardiogram (ECG) abnormalities indicating significant risk of safety for patients participating in the study.
3. Patient is currently using a medication known to be a strong inhibitor or moderate or strong inducer of isoenzyme cytochrome P450 (CYP)3A, if treatment cannot be discontinued or switched to a different medication prior to starting study treatment.
4. Patient is currently using medications that are metabolized by isoenzyme CYP1A2 and have a narrow therapeutic index.
5. Patient is currently using medications known to be organic anion transporter protein (OATP) 1B1, OATP1B3, and breast cancer resistance protein (BCRP) substrates.
6. Patient had been administered live vaccines starting from 6 weeks before the anticipated first study drug administration, during the study, and up to 7 days after the last dose of leniolisib.
7. Patient has clinically significant abnormalities in hematology or clinical chemistry parameters as determined by the investigator or medical monitor.
8. Patient has liver disease or liver injury as indicated by clinically significant abnormal liver function tests (alanine aminotransferase and aspartate aminotransferase >2.5 times upper limit of normal), history of renal injury/renal disease (e.g, renal trauma, glomerulonephritis, or one kidney only), or presence of impaired renal function as indicated by a serum creatinine level >1.5 mg/dL (133 μmol/L).
9. Patient has moderate or severe hepatic impairment (Child-Pugh Class B or C).
10. Patient is receiving concurrent treatment with another investigational therapy or use of another investigational therapy less than 4 weeks from the first study procedure.
11. Patient has active hepatitis B (e.g, hepatitis B surface antigen reactive) or active hepatitis C (e.g, hepatitis C virus RNA [qualitative] is detected) at screening.
12. Patient has human immunodeficiency virus (HIV) infection (HIV 1 or 2) at screening.
13. Patient has a positive coronavirus disease 19 result (polymerase chain reaction or antigen) within 1 week prior to first dose. The patient can be rescreened after a subsequent negative result.
14. Patient has a history of malignancy (except lymphoma) within 3 years before the first study procedure or has evidence of residual disease from a previously diagnosed malignancy.
15. Patient has a previous diagnosis of lymphoma that has been treated with chemotherapy, radiotherapy, or transplant within 1 year of the first study procedure or is anticipated to require lymphoma treatment within 6 months of the first study procedure.
16. Patient has a history of uncontrolled diabetes mellitus within 3 months of the first study procedure.
17. Patient has had major surgery requiring hospitalization or radiotherapy within 4 weeks prior to the first study procedure.
18. Patient has uncontrolled chronic or recurrent infectious disease (with the exception of those that are considered to be characteristic of APDS) or evidence of tuberculosis infection as defined by a positive Mantoux tuberculin skin test at screening. If presence of latent tuberculosis is established, then treatment according to local country guidelines must have been completed before patients can be considered for enrollment.
19. Patient has a known allergy or history of hypersensitivity to study defined medications or any ingredients of the medications.
20. Patient has a planned or expected major surgical procedure.
21. Patient or parent/legal guardian is unable or unwilling to comply with study procedures or is unable to travel for repeat visits.
22. Patient or parent/legal guardian is unwilling to keep study results/observations confidential or to refrain from posting confidential study results/observations on social media sites.
23. Patient or parent/legal guardian refuses to sign consent/assent form.
24. Patient has other underlying medical condition that, in the opinion of the investigator, would impair the ability of the patient to receive or tolerate the planned procedures or follow-up.

Endpoints

Primary and secondary outcome measures (English text)

Primary endpoints 9

1. Part I: • Incidence of treatment-emergent AEs (TEAEs), SAEs, and AEs leading to discontinuation of study drug
2. Part I: • Change from baseline in clinical laboratory test results (hematology, blood chemistry, urinalysis)
3. Part I: • Change from baseline in vital signs
4. Part I: • Change from baseline in physical examination findings
5. Part I: • Change from baseline in electrocardiograms (ECGs)
6. Part I: • Change from baseline in growth and physical development
7. Part I: • Reduction in lymphoproliferation as measured by MRI or low-dose CT at end of 12 weeks of treatment
8. Part I: • Immunophenotype normalization assessed by changes from baseline in the proportion of naïve B cells among all B cells to end of 12 weeks of treatment
9. Part II: • All safety parameters (including TEAEs, SAEs, Aes leading to discontinuation of study drug, physical examination, vital signs, ECGs, growth and physical development, and clinical laboratory results)

Secondary endpoints 5

1. Part I: • 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)
2. Part I: • Frequency of infections, use of antibiotics, and Ig replacement therapy
3. Part I: • Phosphorylated protein kinase B (pAKT) inhibition in whole blood
4. Part II: • Reduction in lymphoproliferation as measured by MRI or low-dose CT at 1 year, as measured by SPD of index and measurable non-index lesions selected as per the Cheson methodology, 3D volume and 3D sizes of spleen and liver, where appropriate
5. Part II: • Incidence of infections, use of antibiotics, and use of Ig replacement therapy

Investigational products

Investigational medicinal products (IMPs), comparators, placebo, auxiliary

Test 2

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Pharming Technologies B.V.

Sponsor organisation

Pharming Technologies B.V.

Address

Darwinweg 24

City

Leiden

Postcode

2333 CR

Country

Netherlands

Scientific contact point

Organisation

Pharming Technologies B.V.

Contact name

Clinical Department

Public contact point

Organisation

Pharming Technologies B.V.

Contact name

Clinical Department

Third parties 7

Locations

1 EU/EEA country · 1 investigational sites

By country

Investigational sites

Country notifications

Trial-start, recruitment-start, end and early-termination notifications submitted per Member State

Results and documents

Annex IV summary of results, Annex V layperson summary, and all documents registered in CTIS for this trial

Documents 8 files

Public protocol annexes, IB summaries, regulatory submissions and post-authorisation documents registered in CTIS.

Application history

4 submissions — initial application plus substantial / non-substantial modifications