Active — Not RecruitingPhase 1/2

Astroscape: A Study of Radiprodil on Safety, Tolerability, Pharmacokinetics, and Effect on Seizures and Behavioral Symptoms in Patients With TSC or FCD Type II

Australia, Belgium, Canada30 participantsStarted 2024-07-10

Plain-language summary

Study RAD-GRIN-201 is a phase 1B/2A trial to assess safety, tolerability, pharmacokinetics (PK), and potential efficacy of radiprodil in participants with Tuberous Sclerosis Complex (TSC) or Focal Cortical Dysplasia (FCD) type II. The study is open-label, so all participants will be treated with radiprodil. Subjects' participation in the study is expected to last up to six months in Part A and one year in Part B/long-term treatment period. The treatment period in Part B may be extended based on a favorable benefit/risk profile.

Who can participate

Age range

6 Months – 18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. diagnosis of FCD Type II based on clinical symptoms and confirmed by a positive magnetic resonance imaging (MRI)
. diagnosis of TSC by either clinical or genetic diagnostic criteria (Northrup, 2021) as documented in the participant's medical record - Participant on average has had at least 8 countable/witnessed primary seizures during a 4-week baseline period with at least 1 seizure occurring in at least 3 of the 4 weeks of baseline

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Incidence of Treatment-Emergent Adverse Events (TEAEs), Serious TEAEs (SAEs), Adverse Drug Reactions (ADRs), TEAEs Leading to Discontinuation and Severity of TEAEs

Timeframe: from Baseline to End-of-study: 1 year 6 months

Plasma concentration of radiprodil and maximum plasma concentration (Cmax)

Timeframe: Titration Visit 1 (week 7): Pre-dose to 12 hours post-dose. Titration Visits 2,3,4 (week 8 to 13) and Maintenance Visit 7 (week 25): pre-dose to 5 hours post-dose

Plasma concentration of radiprodil versus time, area under the curve (AUCt)

Timeframe: Titration Visit 1 (week 7): Pre-dose to 12 hours post-dose. Titration Visits 2,3,4 (week 8 to 13) and Maintenance Visit 7 (week 25): pre-dose to 5 hours post-dose

Pharmacokinetic plasma concentration of radiprodil: half-life (T1/2)

Timeframe: Titration Visit 1 (week 7): Pre-dose to 12 hours post-dose. Titration Visits 2,3,4 (week 8 to 13) and Maintenance Visit 7 (week 25): pre-dose to 5 hours post-dose

Pharmacokinetic plasma concentration of radiprodil: time to Cmax (Tmax)

Timeframe: Titration Visit 1 (week 7): Pre-dose to 12 hours post-dose. Titration Visits 2,3,4 (week 8 to 13) and Maintenance Visit 7 (week 25): pre-dose to 5 hours post-dose

Trial details

NCT IDNCT06392009

SponsorGRIN Therapeutics, Inc.

Sponsor typeINDUSTRY

Study typeINTERVENTIONAL

Primary completion2026-06

View on ClinicalTrials.gov More Tuberous Sclerosis Complex trials

Plain-language summary

Who can participate

Age range

6 Months – 18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. diagnosis of FCD Type II based on clinical symptoms and confirmed by a positive magnetic resonance imaging (MRI)
. diagnosis of TSC by either clinical or genetic diagnostic criteria (Northrup, 2021) as documented in the participant's medical record - Participant on average has had at least 8 countable/witnessed primary seizures during a 4-week baseline period with at least 1 seizure occurring in at least 3 of the 4 weeks of baseline