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Amyotrophic Lateral Sclerosis| ION363

A Study to Evaluate the Efficacy, Safety, Pharmacokinetics and Pharmacodynamics of ION363 in Amyotrophic Lateral Sclerosis Participants With Fused in Sarcoma Mutations (FUS-ALS)

This is a multi-center, two-part study of ION363 in up to 64 participants. Part 1 will consist of participants that will be randomized in a 2:1 ratio to receive a multi-dose regimen of ION363 or placebo for a period of 29 weeks, followed by Part 2, which will be an open-label period where all participants will receive ION363 for a period of 73 weeks.

Purpose of Study

The primary purpose of this study is to evaluate the clinical efficacy of ION363 on clinical function and survival in carriers of fused in sarcoma mutations with amyotrophic lateral sclerosis (FUS-ALS).

Eligibility

Age:
12 - 65
Sex:
Female Icon + Male Icon

Key Inclusion / Exclusion Criteria

Inclusion Criteria:

  • Signs or symptoms consistent with an ALS disease process in the opinion of the Investigator
  • Confirmed genetic mutation in FUS in a clinical laboratory improvement amendments (CLIA) certified testing laboratory and classified as “pathogenic” or “likely pathogenic”. Mutations classified as “Variants of Unknown Significance” must be approved by a variant classification committee
  • An Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised (ALSFRS-R) pre-study slope ≥ 0.4 prior to Screening if 30 to 65 years of age, inclusive, at the time of informed consent
  • Upright (sitting position) slow vital capacity (SVC) as adjusted for sex, age, and height ≥ 50 percentage (%) of predicted value
  • Participants taking edaravone must be on a stable dose for ≥ 28 days prior to Screening and riluzole must be on a stable dose for ≥ 28 days prior to Day 1, and willing to continue on that dose throughout the duration of the study, unless the Investigator determines that it should be discontinued for medical reasons, in which case it may not be restarted during the study
  • Stable concomitant medications and nutritional support for at least 1 month prior to Study Day 1. Concomitant medications or nutritional support that have not been stable for at least 1 month prior to Study Day 1 may be allowed in consultation with the Sponsor Medical Monitor or designee.
  • Has an informant/caregiver who, in the Investigator’s judgment, has frequent and sufficient contact with the participant as to be able to provide accurate information about the participant’s cognitive and functional abilities at Screening. Participants < 18 years old at Screening must have a trial partner (parent, caregiver or other) who is reliable, competent and at least 18 years of age, is willing to accompany the participant to trial visits and to be available to the Study Center by phone if needed, and who (in the opinion of the Investigator) is and will remain sufficiently knowledgeable of participant's ongoing condition to respond to Study Center inquiries about the participant

Exclusion Criteria:

  • Requiring permanent ventilation (> 22 hours of mechanical ventilation [invasive or noninvasive] per day for > 21 consecutive days) and/or tracheostomy
  • Any known ALS-associated mutations except FUS
  • Positive test result indicating chronic or active hepatitis B or hepatitis C or human immunodeficiency virus (HIV), hepatitis C or hepatitis B diagnosed by initial serological testing and confirmed with RNA testing, or prior treatment for hepatitis C.
  • Clinically significant (CS) abnormalities in medical history (e.g., previous acute coronary syndrome within 3 months of Screening, major surgery within 2 months of Screening) or physical examination, unless discussed and approved by the Sponsor Medical Monitor
  • Uncontrolled hypertension (blood pressure [BP] > 160/100 millimeters of mercury [mm Hg])
  • Malignancy within 1 year of Screening, except for basal or squamous cell carcinoma of the skin or carcinoma in situ of the cervix that has been successfully treated. Participants with a history of other malignancies that have been treated with curative intent and which have no recurrence within 6 months may also be eligible if approved by the Sponsor medical monitor
  • Obstructive hydrocephalus
  • Known significant brain or spinal disease that would interfere with the lumbar puncture (LP) process, CSF circulation or safety assessment, including tumors or abnormalities by magnetic resonance imaging (MRI) or computed tomography (CT), subarachnoid hemorrhage, suggestion of raised intracranial pressure on MRI or ophthalmic examination, spinal stenosis or curvature, chiari malformation, obstructive hydrocephalus, syringomyelia, tethered spinal cord syndrome and connective tissue disorders such as Ehlers-Danlos syndrome and Marfan syndrome
  • Concurrent participation in any other interventional clinical study
  • Previous treatment with an oligonucleotide (including small interfering RNA [siRNA])
  • Treatment with another investigational drug, biological agent, or device, including, but not limited to sodium phenylbutyrate, within 1 month of Screening, or 5 half-lives of investigational agent, whichever is longer
  • History of gene therapy or cell transplantation or any other experimental brain surgery
  • Have any other conditions, which, in the opinion of the Investigator would make the participant unsuitable for inclusion, or could interfere with the individual participating in or completing the study

Conditions:

Amyotrophic Lateral Sclerosis

Status:

Recruiting

Phase:

Phase 3

Clinical Trials ID

NCT04768972

Read Detailed Summary:

Start Date / End Date:

04 2021 - 03 2024

Intervention:

ION363

Enrollment:

64

Full Details:

https://clinicaltrials.gov/ct2/show/NCT04768972

Study Locations Map: