Safety, Tolerability, and Exploratory Efficacy Study of Intrathecally Administered Gene Therapy AMT-162 in Adult Participants With SOD1 Amyotrophic Lateral Sclerosis (SOD1-ALS)

UniQure

Status and phase: Active, not recruiting; Phase 2; Phase 1

Conditions: Amyotrophic Lateral Sclerosis

Treatments: Drug: AMT-162

Study type: Interventional

Funder types: Industry

Identifiers

NCT06100276

AMT-162-001

Details and patient eligibility

About

This is the study of AMT-162 in Participants with SOD1-ALS and is designed to evaluate the safety, tolerability, and exploratory efficacy of intrathecally administered gene therapy AMT-162. AMT-162-001 is a Phase 1/2, multi-center, single ascending dose study.

Full description

AMT-162 is an investigational gene therapy that encodes an artificial microribonucleic acid (microRNA or miRNA) targeting the SOD1 gene. This clinical study will test the safety of AMT-162 and explore the hypothesis that it will silence expression of mutant cytosolic SOD1 and thereby ameliorate the course of ALS caused by this mutant gene.

Enrollment: 20 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Confirmed clinical and genetic diagnosis of SOD1-mediated ALS (SOD1-ALS) experiencing signs and/or symptoms of lower motor neuron dysfunction (weakness, atrophy, cramps, fasciculations), with or without upper motor neuron symptoms (weakness, bring reflexes, spasticity).
• ALSFRS-R score ≥ 25 at Screening.
• Slow vital capacity (SVC) ≥50% of predicted normal value.
• Capable of providing informed consent and complying with trial procedures, including: medically able to undergo lumbar puncture and has a responsible caregiver able to attend all clinic visit with the Participant.

Exclusion criteria

• SOD1 pathogenic or likely pathogenic variants in amino acid regions 43-47.

• Pathogenic repeat expansion in the C9orf72 gene

• Any of the following prior or concomitant treatments:

  • Any prior SOD1 suppression therapy with viral microRNA mediators
  • Prior SOD suppression therapy with antisense oligonucleotide (ASO) mediators such as tofersen (QALSODY™). Exception: Patients who previously received tofersen may be enrolled if the last dose of tofersen was received at least 20 weeks prior to the first Screening assessment and if there were no previous tofersen-related SAEs or ongoing tofersen-related adverse events that would increase the risk of receiving AMT-162, per Investigator judgment.
  • Other ALS medications riluzole (RILUTEK®, TIGLUTIK®), edaravone (RADICAVA®), and sodium phenylbutyrate and taururosdiol combination (RELYVRIO) or bioequivalents are allowed if dose is stable for 30 days prior to immunosuppression.
  • Any prior administration of an AAV gene therapy.

• Participants must be willing to forego new ALS treatments through at least 6 months after infusion of AMT-162. After 6 months, Investigators and participants may decide to add new ALS medications or change existing ALS medications.

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Sequential Assignment

Masking: None (Open label)

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20 participants in 2 patient groups

3 single Ascending Dose Levels

Experimental group

Description:

Experimental: 3 single Ascending Dose Levels The study will be open-label with an initial plan to explore 3 dose levels of AMT-162 in approximately 6 to 12 Participants in total. Each Participant will receive a single dose of AMT-162 delivered via an intrathecal (IT) infusion and will be followed for up to 5 years after AMT-162 administration.

Treatment:

Drug: AMT-162

EXPANSION COHORT

Experimental group

Description:

Expansion cohort: To further test selected dose from the SAD part in approximately 6 to 8 participants The study will be open-label. Each Participant will receive a single dose of AMT-162 delivered via an intrathecal (IT) infusion and will be followed for up to 5 years after AMT-162 administration.

Treatment:

Drug: AMT-162