A Study to Evaluate Higher Dose (HD) Nusinersen (BIIB058) in Participants With Spinal Muscular Atrophy Previously Treated With Risdiplam

study id #: NCT05067790

condition: Spinal Muscular Atrophy

status: Not yet recruiting

purpose:

The primary objective of this study is to evaluate motor function following treatment with HD nusinersen in participants with spinal muscular atrophy (SMA) previously treated with risdiplam.

The secondary objective of this study is to evaluate the safety and tolerability of HD nusinersen in participants with SMA previously treated with risdiplam.

intervention: Nusinersen

results: https://clinicaltrials.gov/ct2/show/results/NCT05067790

last updated: February 04, 2022

start date: November 22, 2021

estimated completion: June 14, 2027

last updated: October 5, 2021

phase of development: Phase 3

size / enrollment: 135

primary outcomes:

• Change in Total Revised Upper Limb Module (RULM) Score
  The RULM is being utilized to assess upper limb functional abilities of participants with SMA. This test consists of upper limb performance items that are reflective of activities of daily living. The RULM is scored from 0 to 37 points, with higher scores indicating better function.
• Up to Day 855
  

secondary outcomes:

• Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
  Up to Day 855
• Number of Participants With Change from Baseline in Clinical Laboratory Parameters, Electrocardiogram (ECG), Vital Signs and Pulse Oximetry
  Up to Day 855

inclusion criteria:

Key Inclusion Criteria:

Genetic documentation of 5q SMA homozygous survival motor neuron-1 (SMN1) gene deletion or mutation or compound heterozygous mutation.
Diagnosis of later-onset SMA with symptom onset at age >6 months.
Aged ≥5 to ≤39 years at the time of informed consent for nusinersen-naïve participants.
Aged ≥18 to ≤39 years at time of informed consent for nusinersen-experienced participants.
Body weight >20 kg.
Received oral risdiplam per the approved label or per the managed access program as follows Nusinersen-naive participants must have had prior treatment with risdiplam for ≥6 months and ≤12 months before enrollment.

Nusinersen-experienced participants must have stopped nusinersen for ≥16 months and have been on risdiplam for ≥12 months and ≤18 months before enrollment.

Able to perform the age-appropriate functional assessments in the study.
RULM entry item A score ≥3.
RULM total score ≥5 and ≤30 at Screening.
Nonambulatory, defined as not able to walk 15 feet (4.57 meters) independently without support.
Willing to stop risdiplam treatment.
Willing and able to start treatment with nusinersen.

Key

exclusion criteria: Criteria:

Any major illness within 1 month before the Screening examination or within 1 week prior to Screening and up to first dose administration.
Presence of an untreated or inadequately treated active infection requiring systemic antiviral or antimicrobial therapy at any time during the Screening Period.
Presence of an implanted shunt for the drainage of CSF or of an implanted central nervous system catheter.
History of bacterial meningitis, viral encephalitis, or hydrocephalus.
Ongoing medical condition that according to the Investigator would interfere with the conduct and assessments of the study. An example is a medical disability (e.g., wasting or cachexia, severe anemia, and respiratory parameters) that would interfere with the assessment of safety or would compromise the ability of the participant to undergo study procedures.
Participants who are pregnant or currently breastfeeding and those intending to become pregnant during the study.
Treatment with an investigational drug, biological agent, or device within 30 days or 5 half-lives of the agent, whichever is longer, prior to Screening or anytime during the study; any prior or current treatment with gene therapy for the treatment of SMA.

NOTE: Other protocol defined Inclusion/

sponsor: Biogen

contacts: US Biogen Clinical Trial Center, 866-633-4636, clinicaltrials@biogen.com

investigators: Medical Director,Biogen

trial center locations: