For Healthcare Professionals

A Study for Participants With Spinal Muscular Atrophy (SMA) Who Previously Participated in Nusinersen (ISIS 396443) Investigational Studies


About the study

The primary objective is to evaluate the long-term safety and tolerability of nusinersen (ISIS 396443) administered by intrathecal (IT) injection to participants with Spinal Muscular Atrophy (SMA) who previously participated in investigational studies of nusinersen. The secondary objective is to examine the long-term efficacy of nusinersen administered by IT injection to participants with SMA who previously participated in investigational studies of nusinersen.

Who can take part

You may be eligible to participate in the study if you meet the following criteria:


  1. Signed informed consent of parent or guardian and signed informed assent of participant, if indicated per participant's age and institutional guidelines.
  2. Completion of the index study in accordance with the study protocol or as a result of Sponsor decision (e.g., early termination of the index study) within the preceding 16 weeks Key


  1. Have any condition or worsening condition which in the opinion of the Investigator would make the participant unsuitable for enrollment, or could interfere with the participant participating in or completing the study
  2. Clinically significant abnormalities in hematology or clinical chemistry parameters or electrocardiogram (ECG), as assessed by the Site Investigator, at the Screening visit that would render the participant unsuitable for participation in the study
  3. Participant's parent or legal guardian is not willing or able to meet standard of care guidelines (including vaccinations and respiratory syncytial virus prophylaxis if available), nor provide nutritional and respiratory support throughout the study
  4. Treatment with another investigational agent, biological agent, or device within one month of Screening, or 5 half-lives of study agent, whichever is longer NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.
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Study Locations

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How to Apply

Contact the study center to learn if this study is a good match for you.

Study’s details


Spinal Muscular Atrophy




Phase 3

Participants needed


Est. Completion Date

Aug 2023

Treatment type



Biogen identifier


Study number

ISIS 396443-CS11

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