Clinical trial NCT04428281: A Study to Investigate the Safety, Tolerability, Pharmacokinetics (PK) and Pharmacodynamics (PD) of RO7248824 in Participants With Angelman Syndrome (AS)
Official title: An Open-label, Multicenter Study to Investigate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of RO7248824 in Participants With Angelman Syndrome
Study type: INTERVENTIONAL
Overall status: ACTIVE_NOT_RECRUITING
Phase: PHASE1
Conditions: Angelman Syndrome
Keywords: RO7248824; Angelman; ASO; LNA; Angelman syndrome
Lead sponsor: Hoffmann-La Roche
Sponsor class: INDUSTRY
First posted: 2020-06-11
Enrollment: 74
Sex: ALL
Minimum age (years): 1
Maximum age (years): 12
Standard ages: CHILD
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Non-randomized, adaptive, open label, multiple ascending, intra-participant, dose-escalation study
Primary purpose: TREATMENT

Brief summary: This is a phase I, multicenter, non-randomized, adaptive, open-label, multiple ascending, intra-participant, dose-escalation study with a long-term extension (LTE) part and an optional open-label extension (OOE) part. The objective of the study is to investigate the safety, tolerability, PK and PD of RO7248824 administered intrathecally (IT) in participants with AS. Two linked sets of dose escalation cohorts are planned based on two different age groups, namely participants with AS aged ≥ 5 to ≤ 12 years in cohorts A1 to A5 (with at least 2 participants ≤ 8 years old in each cohort) and AS participants aged ≥ 1 to ≤ 4 years in cohorts B1 to B5. The two sets of cohorts will be run in parallel, with each cohort A1 to A5 preceding and gating the linked cohort B1 to B5 (e.g., A1 precedes B1).


Eligibility criteria: Inclusion Criteria:

* The participant has a parent, caregiver or legal representative (hereinafter "caregiver") who is reliable, competent and at least 18 years of age. The caregiver is willing and able to accompany the participant to clinic visits and to be available to the Investigational Site by phone or email if needed and who (in the opinion of the Investigator) is and will remain sufficiently knowledgeable of participant's ongoing condition to respond to any inquiries about the participant from personnel from the Study Site.
* A caregiver must be able to consent for the participant according to International Council on Harmonisation (ICH) and local regulations.
* Ability to comply with all study requirements.
* Have adequate supportive psychosocial circumstances.
* Able to tolerate blood draws.
* Able to undergo lumbar puncture (LP) and IT injection, under sedation or anesthesia if needed and as determined appropriate by the Investigator.
* Stable medical status for at least 4 weeks prior to Screening and at the time of enrollment.
* Body weight of ≥ 7 kg
* Participant must be ≥ 1 to ≤ 12 years of age at the time of signing of the informed consent by the caregiver.
* Clinical diagnosis of AS confirmed by a molecular diagnosis with genotypic classification of either Ubiquitin-protein ligase E3A (UBE3A) mutation of the maternal allele or deletion on the maternally inherited chromosome 15q11q13 that includes the UBE3A gene and is less than 7 megabyte (Mb) in size.

Reproductive Status:

Some of the provisions that follow may have limited applicability based on the age range of study participants (i.e., up to the age of 12) and the nature of the disease understudy. These provisions are nonetheless included for purposes of completeness in order:

A) Female Participants

A female participant is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies:

* Women of non-childbearing potential.
* Women of childbearing potential who agree to remain abstinent (refrain from heterosexual intercourse) or use acceptable contraceptive methods during the treatment period and for at least 6 months after the final dose of RO7248824 (RG6091). The following are acceptable contraceptive methods: bilateral tubal occlusion/ ligation, male sexual partner who is sterilized, established proper use of hormonal contraceptives that inhibit ovulation, hormone-releasing intrauterine devices and copper intrauterine devices, male or female condom with or without spermicide; and cap, diaphragm, or sponge with spermicide.

B) Male Participants

During the treatment period and for at least 6 months after the final dose of RO7248824 (RG6091), consent has to be provided to:

* Remain abstinent (refrain from heterosexual intercourse) or use contraceptive measures such as a condom, with a female partner of childbearing potential, or pregnant female partner, to avoid exposing the embryo.

The reliability of sexual abstinence for male and/or female enrollment eligibility needs to be evaluated in relation to the duration of the clinical study and the preferred and usual lifestyle of the participant. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or post-ovulation methods) and withdrawal are not acceptable methods of preventing drug exposure.

Inclusion Criteria for OOE Part:

- Current or prior participations in the LTE part of Study BP41674.

Exclusion Criteria:

Diagnostic Assessments

* Clinically-significant laboratory, vital sign or electrocardiography (ECG) abnormalities at Screening

Type of Participants and Disease Characteristics

* Molecular diagnosis of AS with genotypic classification: Paternal Uniparental Disomy (UPD) of 15q11-13; UBE3A Imprinting center defect (ID); A partial molecular diagnosis of AS, that cannot exclude (UPD)or ID despite appropriate genetic testing.
* Clinically relevant hematological, hepatic, cardiac or renal disease or event, in the judgement of the Investigator.
* Any concomitant condition that might interfere with the clinical evaluation of AS and that is not related to AS.
* Known history of human immunodeficiency virus (HIV) or hepatitis B virus (HBV) or hepatitis C virus (HCV).
* Any condition that increases risk of meningitis.
* History of bleeding diathesis or coagulopathy.
* A medical history of brain or spinal disease that would interfere with the LP process, CSF circulation or safety assessment
* History of clinically significant post-lumbar-puncture headache of moderate or severe intensity and/or blood patch
* Malignancy within 5 years of Screening
* Hospitalization for any major medical or surgical procedure involving general anesthesia within 12 weeks of Screening or planned during the study
* Have any other conditions, which, in the opinion of the Investigator, would make the participant unsuitable for inclusion or could interfere with the participant participating in or completing the study, including any contraindication to administration of intrathecal therapy.
* Premature birth with gestational age at birth below 34 weeks.
* History of hypersensitivity to the investigational medicinal product (IMP), antisense oligonucleotides, or any excipients.

Prior Therapy

* Allowed sleep medications have not been stable for 4 weeks prior to screening and at the time of enrollement.
* Allowed medications for treatment of epilepsy have not been stable for 12 weeks prior to screening and at the time of enrollment.
* Use of antiplatelet or anticoagulant therapy for 2 weeks prior to screening and at the time of enrollment.
* Concurrent psychotropic medications have not been stable for 4 weeks prior to screening and at the time of enrollment.

Other Exclusion Criteria: Prior/Concurrent Clinical Study Experience

* Received an investigational drug within 90 days or 5 times the half-life of the investigational drug (whichever is longer) or participation in a study testing an investigational medical device within 90 days prior to first dosing or if the device is still active.
* Concurrent or planned concurrent participation in any clinical study (including observational, non-drug and non-interventional studies) without a signed data sharing agreement in place between the other clinical study and the Sponsor.
* Previous participation in a cellular therapy, or gene therapy, or gene editing clinical study.

Exclusion Criteria for OOE Part:

- Participants who never enrolled in Study BP41674, or who discontinued participation due to safety reasons, are not eligible for the OOE part.

Primary outcomes:
measure: Frequency and Severity of Adverse Events (AEs)
timeFrame: Baseline to last visit or early withdrawal
measure: Frequency and Severity of Serious Adverse Events (SAEs)
timeFrame: Baseline to last visit or early withdrawal
measure: Number of Participants Discontinued Treatment due to AEs
timeFrame: Baseline to last visit or early withdrawal
measure: Frequency of Abnormal Laboratory Findings (Blood, Cerebrospinal Fluid [CSF] and Urinalysis)
timeFrame: Baseline to last visit or early withdrawal
measure: Frequency of Abnormal Vital Signs
timeFrame: Baseline to last visit or early withdrawal
measure: Frequency of Abnormal Electrocardiography (ECG) Values
timeFrame: Baseline to last visit or early withdrawal
measure: Mean Changes From Baseline in Temperature Over Time
timeFrame: Baseline to last visit or early withdrawal
measure: Mean Changes From Baseline in Systolic Blood Pressure Over Time
timeFrame: Baseline to last visit or early withdrawal
measure: Mean Changes From Baseline in Diastolic Blood Pressure Over Time
timeFrame: Baseline to last visit or early withdrawal
measure: Mean Changes From Baseline in Heartrate Over Time
timeFrame: Baseline to last visit or early withdrawal
measure: Mean Changes From Baseline in Respiratory Rate Over Time
timeFrame: Baseline to last visit or early withdrawal
Secondary outcomes:
measure: Time to Maximum Concentration (Tmax) for RO7248824
timeFrame: Baseline to last visit or early withdrawal
measure: Maximum Plasma Concentration Observed (Cmax) for RO7248824
timeFrame: Baseline to last visit or early withdrawal
measure: Area Under Curve (AUC) From Time 0 to Time of Last Sampling Point or Last Quantifiable Sample, Whichever Comes First (AUC last) for RO7248824
timeFrame: Baseline to last visit or early withdrawal
measure: AUC From Time 0 to Infinity (AUCinf) for RO7248824
timeFrame: Baseline to last visit or early withdrawal
Other outcomes:
Locations:
city: Los Angeles
country: United States
facility: UCLA Neuropsychiatric Institute
state: California
city: San Diego
country: United States
facility: Rady Children's Hospital - San Diego
state: California
city: Chicago
country: United States
facility: Rush Medical Center
state: Illinois
city: Rochester
country: United States
facility: Mayo Clinic - Rochester
state: Minnesota
city: New York
country: United States
facility: Columbia University Medical Center
state: New York
city: Carrboro
country: United States
facility: Carolina Institute for Development DisabilitiesUniversity of North Carolina/School of Medicine
state: North Carolina
city: Houston
country: United States
facility: Baylor College of Med
state: Texas
city: Roma
country: Italy
facility: Ospedale Pediatrico Bambino Gesù
state: Lazio
city: Rotterdam
country: Netherlands
facility: Erasmus MC / location Sophia Kinderziekenhuis
city: Esplugues De Llobregas
country: Spain
facility: Hospital Sant Joan De Deu
state: Barcelona
city: Sabadell
country: Spain
facility: Corporacio Sanitaria Parc Tauli
state: Barcelona
city: Sevilla
country: Spain
facility: Hospital Universitario Virgen del Rocío
Study officials:
affiliation: Hoffmann-La Roche
name: Clinical Trials
role: STUDY_DIRECTOR
References: