E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
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E.1.1.1 | Medical condition in easily understood language |
Angelman syndrome is a complex genetic disorder that primarily affects the nervous system. |
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E.1.1.2 | Therapeutic area | Diseases [C] - Congenital, Hereditary, and Neonatal Diseases and Abnormalities [C16] |
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 | 10049004 |
E.1.2 | Term | Angelman's 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 | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To assess the safety and tolerability profile of RO7248824 |
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E.2.2 | Secondary objectives of the trial |
To investigate the plasma pharmacokinetics (PK) of RO7248824 |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal 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 undergo MRI scans (e.g., no metal implants including MRI incompatible intrauterine devices (IUDs), or any condition that renders testing intolerable for the participant), under sedation or anesthesia if needed and as determined appropriate by the Investigator.
• Able to tolerate blood draws.
• Able to undergo 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.
• 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:
o UBE3A truncation mutation of maternal allele
o 15q11-15 deletion of maternal allele
• 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 or 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
• Male Participants: During the treatment period and for at least 6 months after the final dose of RO7248824, consent has to be provided to remain abstinent
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E.4 | Principal exclusion criteria |
• Clinically-significant laboratory, vital sign or electrocardiography (ECG) abnormalities at Screening.
• Molecular diagnosis of AS with genotypic classification of:
o UBE3A missense mutation of maternal allele
o Paternal UPD of 15q11-13
o UBE3A ID
o 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. Pre-existing abnormal hepatic, renal or hematology lab tests must be discussed with the Sponsor Medical Monitor.
• 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 C.
• 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 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.
• Concurrent or planned concurrent participation in any clinical study (including observational and non-interventional studies) without approval of the Sponsor Medical Monitor. At the discretion of the Sponsor, participants may enroll into non-drug observational studies.
• Previous participation in a gene therapy or gene editing clinical study.
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E.5 End points |
E.5.1 | Primary end point(s) |
1. Frequency and severity of adverse events, serious adverse events, treatment discontinuations due to adverse events.
2. Frequency of abnormal laboratory findings (blood and cerebrospinal fluid [CSF]).
3. Frequency of abnormal vital signs and ECG values.
4. Mean changes from baseline in vital signs (temperature, systolic and diastolic blood pressure, heartrate, respiratory rate) over time.
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
1. Time to maximum concentration (Tmax)
2. Maximum plasma concentration observed (Cmax)
3. AUC from Time 0 to time of last sampling point or last quantifiable sample, whichever comes first (AUClast), AUC from Time 0 to infinity (AUCinf)
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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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 | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | No |
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) | Yes |
E.7.1.1 | First administration to humans | Yes |
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) | No |
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.8.2.4 | Number of treatment arms in the trial | 2 |
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 | 8 |
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 |
Canada |
Italy |
Netherlands |
Spain |
United Kingdom |
United States |
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E.8.7 | Trial has a data monitoring committee | No |
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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A participant is considered to have completed the study if he/she has completed all periods of the study including the final visit at Day 365. The end of the study is defined as the date when the last participant last observation (LPLO) occurs. Due to the exploratory nature of this clinical study, its conduct can be discontinued at any time at the discretion of the Sponsor. This will not constitute a premature termination of the study. |
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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 | 2 |
E.8.9.1 | In the Member State concerned months | 6 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 6 |