Study of AROSOD-1 in Adult Participants With Amyotrophic Lateral Sclerosis (ALS)

• ClinicalTrials.gov Identifier: NCT05949294
• Recruitment Status: Withdrawn
• First Posted: July 18, 2023
• Last Update Posted: April 17, 2024
• Sponsor: Arrowhead Pharmaceuticals
• Information provided by (Responsible Party): Arrowhead Pharmaceuticals

Study Description

Brief Summary:

In this Phase 1 adult symptomatic patients with amyotrophic lateral sclerosis (ALS) carrying a superoxide dismutase 1 (SOD1) gene mutation thought to be causative of ALS, will receive single ascending doses of ARO-SOD1 administered by intrathecal (IT) infusion. The study is primarily intended to evaluate safety, but will also evaluate the effect of ARO-SOD1 on SOD1 cerebrospinal fluid (CSF) levels as a biomarker of pharmacodynamic (PD) effect, therefore lumbar punctures will be required at timepoints throughout the study. After each participant has completed their individual final visit, participants whose SOD1 CSF levels have recovered to a satisfactory level may rescreen and enroll into higher dose cohorts; or if unable or unwilling to rescreen may enroll into an open-label study to be added by amendment when supported by nonclinical data for multidose administration.

Condition or disease	Intervention/treatment	Phase
Amyotrophic Lateral Sclerosis	Drug: ARO-SOD1 Injection	Phase 1

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 0 participants
• Allocation: N/A
• Intervention Model: Sequential Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase 1 Dose Escalation Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of ARO-SOD1 in Adult Patients With Amyotrophic Lateral Sclerosis Harboring a Superoxide Dismutase-1 Mutation Considered to be Causative of Amyotrophic Lateral Sclerosis
• Estimated Study Start Date: January 2024
• Estimated Primary Completion Date: March 2025
• Estimated Study Completion Date: March 2025

Arms and Interventions

Arm	Intervention/treatment
Experimental: ARO-SOD1; ARO-SOD1 Injection	Drug: ARO-SOD1 Injection; single doses of ARO-SOD1 Injection by IT infusion

Outcome Measures

Primary Outcome Measures :

1. Number of Participants with Treatment-Emergent Adverse Events (TEAEs) [ Time Frame: From first dose of study drug through the end of study (EOS; up to 168 days) ]

Secondary Outcome Measures :

1. Change Over Time from Baseline in CSF SOD1 Protein Levels [ Time Frame: Pre-dose on Day 1 (Baseline) through EOS (up to 168 days) ]
2. Change Over Time from Baseline in Plasma Levels of Neurofilament Light Chain (NfL) [ Time Frame: Pre-dose on Day 1 (Baseline) through EOS (up to 168 days) ]
3. Pharmacokinetics (PK) of ARO-SOD1: Maximum Observed Plasma Concentration (Cmax) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
4. PK of ARO-SOD1: Time to Reach Maximum Observed Plasma Concentration (Tmax) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
5. PK of ARO-SOD1: Area Under the Plasma Concentration Versus Time Curve from Zero to 24 Hours (AUC0-24) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
6. PK of ARO-SOD1: Area Under the Plasma Concentration Versus Time Curve from Zero to the Last Quantifiable Plasma Concentration (AUClast) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
7. PK of ARO-SOD1: Area Under the Plasma Concentration Versus Time Curve from Zero to Infinity (AUCinf) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
8. PK of ARO-SOD1: Terminal Elimination Half-Life (t1/2) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
9. PK of ARO-SOD1: Apparent Systemic Clearance (CL/F) [ Time Frame: Days 1, 2, 15, 29, 57, 85 and EOS (Day 168): Pre-dose, post-dose at 1, 3, 5, 7, 12 and 24 hours ]
10. PK of ARO-SOD1: Recovery of Unchanged Drug in Urine Over 0-24 Hours (Amount Excreted: Ae) [ Time Frame: Pre-dose through 24 hours post-dose ]
11. PK of ARO-SOD1: Percentage of Administered Drug Recovered in Urine Over 0-24 Hours [ Time Frame: Pre-dose through 24 hours post-dose ]
12. PK of ARO-SOD1: Renal Clearance (CLr) [ Time Frame: Pre-dose through 24 hours post-dose ]
13. Change From Baseline in Total Protein in CSF [ Time Frame: Pre-dose on Day 1 (Baseline) through EOS (up to 168 days) ]
14. Change From Baseline in Glucose in CSF [ Time Frame: Pre-dose on Day 1 (Baseline) through EOS (up to 168 days) ]
15. Change From Baseline in Cell Count in CSF [ Time Frame: Pre-dose on Day 1 (Baseline) through EOS (up to 168 days) ]

Eligibility Criteria

• Ages Eligible for Study: 18 Years and older (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Diagnosis of ALS based on source-verifiable medical record and meets the Gold Coast Criteria
• Pathogenic or likely pathogenic SOD1 mutation based on source-verifiable medical records or genetic testing during Screening
• Slow Vital Capacity (SVC) ≥ 50% of predicted value adjusted for sex, age, and height (from a sitting position) at Screening
• Body Mass Index (BMI) ≥ 18.0 kg/m2 at Screening
• Able to complete at least 6 months of follow-up
• If taking any medication or supplement to treat ALS or ALS symptoms, must be on stable dose for ≥ 4 weeks prior to Day 1 and expected to remain at that dose until final study visit and not expected to start these medications after the first dose of ARO-SOD1
• Able and willing to provide written informed consent and to comply with all study assessments
• Participants of childbearing potential must agree to use highly effective contraception in addition to a condom during the study and for at least 90 days following the end of study or last dose of study drug, whichever is later. Males must not donate sperm and females must not donate eggs during the study and for at least 90 days following the end of the study or last dose of study drug, whichever is later.

Exclusion Criteria:

• Current or anticipated need of a diaphragm pacing system (DPS) during the study
• Participants using tofersen can be enrolled only after a washout period of approximately 20 weeks from the last tofersen dose to the first planned dose of ARO-SOD1
• History of having received stem cell therapy for ALS treatment
• Any current or anticipated contraindications to lumbar puncture (LP)
• The presence of an implanted shunt for drainage of CSF or an implanted central nervous system (CNS) catheter
• Human immunodeficiency virus (HIV), seropositive for hepatitis B virus (HBV), seropositive for hepatitis C virus (HCV)
• Uncontrolled hypertension
• Severe cardiovascular disease
• History of drug abuse or alcoholism within 6 months of study enrollment
• Inability to comply with study requirements

Note: additional inclusion/exclusion criteria may apply per protocol

Contacts and Locations

No Contacts or Locations Provided

More Information

• Responsible Party: Arrowhead Pharmaceuticals
• ClinicalTrials.gov Identifier: NCT05949294
• Other Study ID Numbers: AROSOD1-1001; 2023-509032-26 ( EudraCT Number )
• First Posted: July 18, 2023
• Last Update Posted: April 17, 2024
• Last Verified: April 2024

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: No

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No
• Product Manufactured in and Exported from the U.S.: Yes

Additional relevant MeSH terms:

Motor Neuron Disease; Amyotrophic Lateral Sclerosis; Sclerosis; Pathologic Processes; Neurodegenerative Diseases; Nervous System Diseases; Neuromuscular Diseases; Spinal Cord Diseases; Central Nervous System Diseases; TDP-43 Proteinopathies; Proteostasis Deficiencies; Metabolic Diseases