Safety, Tolerability, and Pharmacokinetics of SVG103 (Paxalisib) in Focal Cortical Dysplasia Type II (FCD-II), Tuberous Sclerosis Complex (TSC) or Hemimegalencephaly (HME)

NCT07287202 | Not Yet Recruiting Phase 1 FDA Drug

• 1 other identifier: SVG103-001
• Study Type: interventional
• Target: 15
• Locations: 1 country
• Sites: 2

Brief Summary

This is a multinational, open-label, single-arm trial of adjunctive SVG103 (paxalisib) treatment in adults with FCD-II, TSC, and HME.

Conditions

Hemimegalencephaly; Focal Cortical Dysplasia; Tuberous Sclerosis Complex (TSC)

Keywords

FCD-II; TSC; HME

Outcome Measures

Primary Outcomes (1)

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

  An adverse event (AE) was any untoward medical occurrence in a clinical study patient, temporally associated with the use of study drug, whether or not considered related to the study drug. A serious adverse event was any untoward medical occurrence that, at any dose, results in death, is life threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or any other event that requires scientific judgment.

  Up to 36 Weeks

Secondary Outcomes (1)

• Change from baseline in seizure frequency

  Baseline to Core Phase: week 1 to 12 and Baseline to Extension Phase: week 13 to 36

Study Arms (1)

Arm1

EXPERIMENTAL

Drug: SVG103 capsule It will be administered once a day (q.d.) orally.

Drug: SVG103

Interventions

SVG103 DRUG

The study treatment is administered for 3 months during the core phase and for an additional 6 months during the extension phase. Oral, daily, dosage per protocol.

Also known as: paxalisib

Arm1

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Participants diagnosed with:
• FCD-II: diagnosis of FCD Type II based on clinical symptoms and confirmed by a positive magnetic resonance imaging (MRI) or histological/pathological analysis of brain tissue, or
• TSC: diagnosis of TSC by either clinical or genetic diagnostic criteria as documented in the participant's medical record, or
• HME: Definitive HME confirmed with MRI.
• Male or female between the ages of 18 and 65 years of age (inclusive).
• History of failure to control seizures despite at least 2 ASMs at appropriate dosages and duration of treatment.
• Participants must have experienced at least 8 countable seizures per month for 2 of the 3 months as documented in historical seizure diaries before the baseline period.
• \. If participants are on a ketogenic or modified atkins diet, that the regimen can remain unchanged throughout the study, in the opinion of the investigator.
• \. Participants with Neurostimulation devices (i.e. Vagus Nerve Stimulation (VNS), Responsive Neuro Stimulation (RNS), Deep Brain Stimulation (DBS) who meet all of the following conditions:
• The device has been implanted for ≥1 year prior to the screening visit.
• The settings must have remained constant for 3 months prior to the screening visit and can remain constant throughout the study, in the opinion of the investigator.
• The battery is expected to last throughout the study. 8. A participant/caregiver or LAR willing to give written informed consent, after being properly informed of the nature and risks of the study and prior to engaging in any study-related procedures.

You may not qualify if:

• Clinically significant hepatic, renal, pulmonary, gastrointestinal, neurological (other than epilepsy; HME; TSC; FCD-II), autoimmune, immunological, infections, hematological, malignant conditions that may interfere with or impact the participation in the study or study conduct, as determined but the investigator or sponsor.
• Immunocompromised participants, defined as acquired immune deficiency syndrome (AIDS), cancer, malnutrition, and certain genetic disorders or undergoing treatment with anticancer drugs, radiation therapy, and stem cell or organ transplant.
• Participants who have an active central nervous system (CNS) infection, demyelinating disease, degenerative neurological disease, or CNS disease deemed progressive as evaluated by brain imaging (magnetic resonance imaging \[MRI\]).
• Participants being considered for brain surgery during the study or has undergone brain surgery within 6 months prior to screening visit for epilepsy or any other reason.
• Participants with HbA1c levels ≥9.0%, or with hyperglycemia or diabetes requiring insulin therapy, or significant uncontrolled hyperglycaemia or diabetes mellitus that would compromise patient safety, as determined by the investigator.
• Participants with active pneumonitis that are clinically symptomatic.
• Participants with a history of myocardial infarction or coronary artery disease or clinically significant ECG abnormality.
• Participants who have clinically significant hepatic, renal and blood laboratory values at baseline period.
• Participants with known sensitivity or allergy to any component in the investigational product(s) (microcrystalline cellulose, lactose monohydrate, croscarmellose sodium, and colloidal silicon dioxide).

Sponsors & Collaborators

• Sovargen: lead

Study Sites (2)

Austin Hospital

Heidelberg, Victoria, 3084, Australia

Location

The Alfred

Melbourne, Victoria, 3004, Australia

Location

MeSH Terms

Conditions

Focal Cortical Dysplasia; Tuberous Sclerosis; Hemimegalencephaly

Condition Hierarchy (Ancestors)

Malformations of Cortical Development, Group I; Malformations of Cortical Development; Nervous System Malformations; Nervous System Diseases; Congenital Abnormalities; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Hamartoma; Neoplasms; Neoplasms, Multiple Primary; Neoplastic Syndromes, Hereditary; Neurocutaneous Syndromes; Heredodegenerative Disorders, Nervous System; Neurodegenerative Diseases; Genetic Diseases, Inborn; Megalencephaly; Craniofacial Abnormalities; Musculoskeletal Abnormalities; Musculoskeletal Diseases

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 11, 2025
• First Posted: December 17, 2025
• Study Start: March 1, 2026
• Primary Completion (Estimated): December 1, 2026
• Study Completion (Estimated): June 1, 2027
• Last Updated: December 23, 2025

Record last verified: 2025-12

Locations

AU (2)