Studies how the body processes nusinersen given through an implanted port
Tests nusinersen given through an implanted port in children and adults with SMA.
Plain-language title generated from the registry record
Registry title: A Study to Find Out How Nusinersen is Processed in the Body When Given Through the ThecaFlex DRx™ System in Adult and Pediatric Participants With Spinal Muscular Atrophy (PIERRE-PK)
Key facts
- Where
- Sheffield, United KingdomSee the site
- Phase
- Phase 1
Where in United Kingdom
- Royal Hallamshire Hospital Neurology DepartmentSheffield, United KingdomTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Biogen
- Trial code
- NCT06555419EU 2024-514239-21-00
- Record updated
- 3 September 2026
- Original description
In this PIERRE-PK study, researchers will learn how the body processes nusinersen when it is given through the ThecaFlex DRx™ System, compared to when nusinersen is given by lumbar puncture (LP). The ThecaFlex DRx system is an investigational implantable medical device developed by Alcyone Therapeutics, Inc. It consists of a catheter, which is a flexible tube, connected to a port which is placed under the skin. Alcyone Therapeutics, Inc. has an ongoing study called PIERRE to test the ThecaFlex DRx system. Participants with spinal muscular atrophy (SMA) in the PIERRE study may be enrolled in the PIERRE-PK study.Read full original descriptionShow less
An Open Label Study to Assess the Pharmacokinetic Profile of Nusinersen (BIIB058) Administered Via the ThecaFlex DRx™ System (PIERRE-PK)
In this PIERRE-PK study, researchers will learn how the body processes nusinersen when it is given through the ThecaFlex DRx™ System, compared to when nusinersen is given by lumbar puncture (LP). The ThecaFlex DRx system is an investigational implantable medical device developed by Alcyone Therapeutics, Inc. It consists of a catheter, which is a flexible tube, connected to a port which is placed under the skin. Alcyone Therapeutics, Inc. has an ongoing study called PIERRE to test the ThecaFlex DRx system. Participants with spinal muscular atrophy (SMA) in the PIERRE study may be enrolled in the PIERRE-PK study.
The main goal of the PIERRE-PK study is to learn how the body processes nusinersen when given by the ThecaFlex DRx system compared to a lumbar puncture. The main questions researchers want to answer are:
* What is the highest amount of nusinersen found in the blood after dosing? * How much nusinersen is found in the blood over the first 24 hours after dosing?
The PIERRE-PK study will be done as follows:
* Participants will be screened to check if they can join the study. The screening period will be up to 30 days for this study and may overlap with the PIERRE study. * Participants will join 1 of 2 groups based on their ongoing nusinersen treatment. One group will be receiving 12 mg doses of nusinersen. The other group will be receiving 28 mg doses of nusinersen. * Participants will first receive a dose of nusinersen by lumbar puncture. * The ThecaFlex DRx system will be implanted after the lumbar puncture, as part of the PIERRE study. * Participants will receive a dose of nusinersen by the ThecaFlex DRx system, as part of the PIERRE study. This dose will be a regular maintenance dose that happens about 4 months after their first dose in this study. * Researchers will take blood samples before and after each dose. The last blood sample will be taken 24 hours after the dose. * The total study duration for each participant in the PIERRE-PK study will be approximately 5 months. This period will overlap with the participant's first 5 months in the PIERRE study.
Inclusion: Participants must be screened in the PIERRE study to be eligible for enrollment in the PIERRE PK study; Participants in the 12 mg group; Participant must have completed all 4 required 12 mg loading doses as per the approved 12 mg dose regimen; Participant is on regular LP maintenance dosing of nusinersen 12 mg every 4 months, with 120 days ± 14 days between the LP-delivered study dose and the last nusinersen dose prior to study enrollment; Participants in the 28 mg group; Participant must have completed 1 or 2 of the 50 mg loading doses as per the approved 50/28 mg dose regimen; Participant is on regular LP maintenance dosing of nusinersen 28 mg every 4 months, with 120 days ± 14 days between the LP-delivered study dose and the last nusinersen dose prior to study enrollment.
Exclusion: Ongoing participation or participation within 6 months or 5 half-lives of the agent (whichever is longer) of enrollment in other interventional clinical trials for the treatment of SMA (except for the PIERRE study or interventional clinical trials of myostatin inhibitors [e.g., apitegromab and taldefgrobep alfa]); Participant is receiving nusinersen at a dose other than 12 mg or 28 mg; Participant is naïve to nusinersen treatment; Participant has already undergone implantation of the ThecaFlex DRx system or any other implantable medical device for intrathecal (IT) administration; Participant is pregnant, currently breastfeeding, or intending to become pregnant during the study; NOTE: Other protocol-defined Inclusion/Exclusion criteria may apply.