- In two pivotal clinical studies, Evrysdi showed event-free survival and motor milestone improvements never previously achieved in the natural history of the disease
- More than 2,500 patients now treated with Evrysdi in clinical trial, compassionate use and real-world settings
- Evrysdi is approved in seven countries, submitted in 30 more
The CHMP recommendation was completed under the accelerated assessment pathway, which is offered to medicines deemed to be of major interest for public health and therapeutic innovation. A final decision regarding approval is expected from the
“Our close partnership with the SMA community has enabled the development of the first ‘at-home’ treatment for SMA in infants, children and adults with varying levels of disease severity, the majority of whom remain untreated,” said
The CHMP recommendation is based on data from two clinical studies designed to represent a broad spectrum of people living with SMA: FIREFISH in symptomatic Type 1 infants aged 2 to 7 months and SUNFISH in symptomatic Type 2 and 3 children and adults aged 2 to 25 years. SUNFISH is the first and only placebo-controlled trial to include adults with Types 2 and 3 SMA.
In FIREFISH, 29% (12/41; p<0.0001 compared to natural history) of infants treated with Evrysdi for 12 months were able to sit without support for at least five seconds, as assessed by the Gross Motor Scale of the Bayley Scales of Infant and Toddler Development Third Edition. This is a key motor milestone never achieved in the natural history of Type 1 SMA. In addition, 93% of infants were alive and 85% were event-free (alive with no permanent ventilation). Furthermore, 5% (2/41) of infants were able to stand with support, as measured by the Hammersmith Infant Neurological Examination, and 83% were able to feed orally. Ninety per
In SUNFISH, children and adults treated with Evrysdi experienced a clinically meaningful and statistically significant improvement in motor function at 12 months (1.55 point mean difference; p=0.0156) compared to placebo (1.36 points [95% CI: 0.61, 2.11]; -0.19 points [95% CI: -1.22, 0.84], respectively), as measured by a change from baseline in the Motor Function Measure-32 (MFM-32) total score. Children and adults also experienced significant improvement in upper limb function, a key secondary endpoint, at 12 months (1.59 point mean difference; p=0.0469) compared to placebo (1.61 points [95% CI: 1.00, 2.22]; 0.02 points [95% CI: -0.83, 0.87] respectively), as measured by a change from baseline in the Revised Upper Limb Module (RULM). The median age at enrolment was nine years.
Evrysdi demonstrated a favourable efficacy and safety profile, with the safety profile established across the FIREFISH and SUNFISH trials. The most common adverse events were upper respiratory tract infection, pneumonia, nasopharyngitis, pyrexia, constipation, rhinitis, diarrhoea, headache, cough and vomiting. There were no treatment-related safety findings leading to withdrawal from either study.
Evrysdi is designed to treat SMA by increasing and sustaining the production of the survival motor neuron (SMN) protein. SMN protein is found throughout the body and is critical for maintaining healthy motor neurons and movement.
More than 2,500 patients have now been treated with Evrysdi in clinical trials, compassionate use and real world settings, with patients ranging from birth to over 70 years of age and including those previously treated with other SMA-targeting therapies.
*Children’s Hospital of Philadelphia Infant Test of Neuromuscular Disorders
About Evrysdi™ (risdiplam)
Evrysdi is a survival motor neuron 2 (SMN2) splicing modifier designed to treat SMA caused by mutations in chromosome 5q that lead to SMN protein deficiency. Evrysdi is administered daily at home in liquid form by mouth or by feeding tube.
Evrysdi has been approved in seven countries (US,
Evrysdi is currently being evaluated in four multicentre trials in people with SMA:
- FIREFISH (NCT02913482) – an open-label, two-part pivotal clinical trial in infants with Type 1 SMA. Part 1 was a dose-escalation study in 21 infants with the primary objective of assessing the safety profile of risdiplam in infants and determining the dose for Part 2. Part 2 is a pivotal, single-arm study of risdiplam in 41 infants with Type 1 SMA treated for 2 years, followed by an open-label extension. Enrolment for Part 2 was completed in
November 2018 . The primary objective of Part 2 was to assess efficacy as measured by the proportion of infants sitting without support after 12 months of treatment, as assessed by the Gross Motor Scale of the Bayley Scales of Infant andToddler Development – Third Edition (BSID-III) (defined as sitting without support for 5 seconds). The study met its primary endpoint. - SUNFISH (NCT02908685) – SUNFISH is a two part, double-blind, placebo controlled pivotal study in people aged 2-25 years with Types 2 or 3 SMA. Part 1 (n=51) determined the dose for the confirmatory Part 2. Part 2 (n=180) evaluated motor function using the total score of Motor Function Measure 32 (MFM-32) at 12 months. MFM-32 is a validated scale used to evaluate fine and gross motor function in people with neurological disorders, including SMA. The study met its primary endpoint.
- JEWELFISH (NCT03032172) – an open-label exploratory trial designed to assess the safety, tolerability, pharmacokinetics and pharmacodynamics in people with SMA aged 6 months to 60 years who received other investigational or approved SMA therapies for at least 90 days prior to receiving Evrysdi. The study has completed recruitment (n=174).
- RAINBOWFISH (NCT03779334) – an open-label, single-arm, multicentre study, investigating the efficacy, safety, pharmacokinetics and pharmacodynamics of risdiplam in babies (~n=25), from birth to six weeks of age (at first dose) with genetically diagnosed SMA who are not yet presenting with symptoms. The study is currently recruiting.
About SMA
SMA is a severe, progressive neuromuscular disease that can be fatal. It affects approximately one in 10,000 babies and is the leading genetic cause of infant mortality. SMA is caused by a mutation of the survival motor neuron 1 (SMN1) gene, which leads to a deficiency of SMN protein. This protein is found throughout the body and is essential to the function of nerves that control muscles and movement. Without it, nerve cells cannot function correctly, leading to muscle weakness over time. Depending on the type of SMA, an individual’s physical strength and their ability to walk, eat or breathe can be significantly diminished or lost.
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