A Study to Investigate the Safety and Efficacy of RO7204239 in Combination With Risdiplam (RO7034067) in Participants With Spinal Muscular Atrophy
Phase 2
Active, not recruiting
- Conditions
- Spinal Muscular Atrophy (SMA)
- Interventions
- Registration Number
- NCT05115110
- Lead Sponsor
- Hoffmann-La Roche
- Brief Summary
Risdiplam works by helping the body produce more survival motor neuron (SMN) protein throughout the body. This means fewer motor neurons - nerve cells that pass impulses from nerves to muscles to cause movement - are lost, which may improve how well muscles work in people with SMA. RO7204239 is an investigational anti-myostatin antibody that is designed to target myostatin. Myostatin plays an important role in the regulation of skeletal muscle size by controlling growth. Inhibiting myostatin may help muscles grow in size and strength. RO7204239 in combination with risdiplam, which is designed to increase the amount of SMN protein throughout the body, has the potential to further improve motor function and clinical outcomes for people living with SMA.
This trial will study the safety and efficacy of RO7204239 in combination with risdiplam in patients with spinal muscular atrophy (SMA). The trial has two parts; Part 1 is the dose-finding part in SMA patients that are either ambulant (aged 2-10 years) or non-ambulant (aged 5-10 years) within separate cohorts, and Part 2 is the pivotal part in SMA patients aged 2-25 years that are ambulant.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- ACTIVE_NOT_RECRUITING
- Sex
- All
- Target Recruitment
- 259
Inclusion Criteria
- Age at screening: Part 1 Cohorts A (ambulant participants), B (ambulant participants), and D (non-ambulant participants): 5-10 years, inclusive; Part 1 Cohort C (ambulant participants): 2-4 years, inclusive; Part 2 (ambulant participants): 2-25 years, inclusive
- Participants who have a confirmed genetic diagnosis of 5q-autosomal recessive SMA
- Symptomatic SMA disease, as per investigator's clinical judgement
- Participants who have received previous SMA disease-modifying therapies may be included provided that: Onasemnogene abeparvovec was received at least 90 days prior to screening. Participants should be tapered off steroids prior to receiving risdiplam. In addition, participants should have normal levels of liver function tests, coagulatory parameters, platelets, and troponin-I at 90 days after administration of onasemnogene abeparvovec or at least 1 month after tapering off corticosteroids, whichever comes later; Nusinersen last dose was received at least 90 days prior to screening; Risdiplam is switched to the investigational medicinal product (IMP) provided by the site
Inclusion Criteria for Part 1 Cohorts A, B, and C and Part 2 only:
- Participants who are ambulant, where ambulant is defined as able to walk/run unassisted (i.e., without the use of assistive devices such as canes, walking sticks, crutches, walkers, person/hand-held assistance, braces, orthoses, over the malleoli insoles or any other type of support) 10 meters in ≤ 30 seconds as measures by the Timed 10-Meter Walk/Run Test [10MWRT] at screening
Inclusion Criteria for Part 1 Cohort D only:
- Participants who are able to sit, defined by: A score of 3 on Item 9 of the MFM32 (sitting without upper limb support while maintaining contact between the two hands for 5 seconds); A score of at least 2 on Item 10 of the MFM32 (while seated, leaning forward to touch a tennis ball and sitting back again, either with or without upper limb support)
- Participants who are able to raise a standardized plastic cup with a 200g weight in it to the mouth, using both hands if necessary, defined by a score of 3 on the entry item of the Revised Upper Limb Module (RULM)
Exclusion Criteria
- Concomitant or previous participation in any investigational drug or device study within 90 days prior to screening or 5 half-lives of the drug whichever is longer, with the exception of those who have completed a risdiplam study, or participated in a nusinersen or onasemnogene abeparvovec study
- Receiving or have received previous administration of anti-myostatin therapies
- Any history of cell therapy
- Hospitalization for a pulmonary event within the last 2 months or planned hospitalization at the time of screening
- Past surgery for scoliosis or hip fixation in the 6 months preceding screening or planned within the next 9 months (Part 1) or 21 months (Part 2)
- Unstable gastrointestinal, renal, hepatic, endocrine, or cardiovascular system diseases considered to be clinically significant
- Clinically significant ECG abnormalities at screening from average of triplicate measurement, abnormal findings at echocardiography, or cardiovascular disease indicating a safety risk for participants at the time of screening
- Any major illness within 1 month before screening
- Received any multidrug and toxin extrusion (MATE1/2K) substrates within 2 weeks before screening
- Hereditary fructose intolerance
- Used any of the following medications within 90 days prior to screening: riluzole, valproic acid, hydroxyurea, sodium phenylbutyrate, butyrate derivatives, creatine, carnitine, growth hormone, anabolic steroids, probenecid, acetyl cholinesterase inhibitors, agents that could potentially increase or decrease muscle strength, and agents with known or presumed histone deacetylase (HDAC) inhibitory effect
- Clinically significant abnormalities in laboratory test results at the time of screening
- Ascertained or presumptive hypersensitivity to RO7204239 or risdiplam, or to the constituents of its formulations
- Clinically relevant history of anaphylactic reaction requiring inotropic support
- Any abnormal skin conditions, pigmentation or lesions in the area intended for SC injection (abdomen) and that would prevent visualization of potential injection site reactions to RO7204239
- Immobilization, surgical procedures, fracture, or trauma to the upper or lower limbs within 90 days prior to screening
Exclusion Criteria for Part 1 Cohorts A and B only:
- Participants with contraindications for MRI scan (including, but not restricted to, claustrophobia, pacemaker, artificial heart valves, cochlear implants, presence of foreign metal objects in heart or body, including spinal rods, intracranial vascular clips, insulin pumps, etc.), difficulties maintaining a prolonged supine position, or any other clinical history or examination finding that would pose a potential hazard in combination with MRI
Exclusion Criteria for Part 1 Cohort D only:
- Participants who are unable to adopt the correct position to endure adequate quality of DXA scan acquisition, as determined by the DXA scan technologist
- Participants who have contractures at screening that would interfere with DXA scan acquisition or functional assessments, as confirmed by the DXA scan technologist and clinical evaluator
- For participants able to take steps only: Able to walk unassisted (i.e., without the use of assistive devices such as canes, walking sticks, crutches, walkers, person/hand held assistance, braces, orthoses, over the malleoli insoles or any other type of support) 10 meters in ≤ 30 seconds as measured by the timed 10MWRT at screening
- Participants who have severe scoliosis (curvature > 40°) at screening based on the participant's most recent X-ray as performed per standard of care or scoliosis that would interfere with functional assessments, as confirmed by the clinical evaluator. An X-ray is not required if it is not clinically indicated (e.g., in participants with mild scoliosis)
- Participants who require invasive ventilation, tracheostomy, or the use of noninvasive ventilation (e.g., bilevel positive airway pressure) during the daytime
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Placebo + Risdiplam Placebo Participants who have not previously been treated with risdiplam will receive risdiplam for at least 8 weeks prior to randomization into a treatment group (Part 1 only). Participants that have been treated with risdiplam for at least 8 continuous weeks immediately prior to joining the study may be immediately randomized to combination therapy, or join the study run-in period (the period between screening and randomization to a treatment group) where they will continue to receive risdiplam monotherapy until randomization. Participants enrolled in Part 1 will receive placebo (low or high dose-matched) + risdiplam for 24 weeks, followed by RO7204239 + risdiplam for 72 weeks. Participants enrolled in Part 2 will receive risdiplam for 8 weeks and then treatment with placebo + risdiplam for 72 weeks. Once the treatment period has completed (Part 1 or Part 2), participants will have the option of treatment with RO7204239 + risdiplam for 2 additional years. RO7204239 + Risdiplam RO7204239 Participants who have not previously been treated with risdiplam will receive risdiplam for at least 8 weeks prior to randomization into a treatment group (Part 1 only). Participants that have been treated with risdiplam for at least 8 continuous weeks immediately prior to joining the study may be immediately randomized to combination therapy, or join the study run-in period (the period between screening and randomization to a treatment group) where they will continue to receive risdiplam monotherapy until randomization. Participants enrolled in Part 1 will receive RO7204239 (low or high dose) + risdiplam for 24 weeks, followed by RO7204239 + risdiplam for 72 weeks. Participants enrolled in Part 2 will receive risdiplam for 8 weeks and then treatment with RO7204239 + risdiplam for 72 weeks. Once the treatment period has completed (Part 1 or Part 2), participants will have the option of treatment with RO7204239 + risdiplam for 2 additional years. RO7204239 + Risdiplam Risdiplam Participants who have not previously been treated with risdiplam will receive risdiplam for at least 8 weeks prior to randomization into a treatment group (Part 1 only). Participants that have been treated with risdiplam for at least 8 continuous weeks immediately prior to joining the study may be immediately randomized to combination therapy, or join the study run-in period (the period between screening and randomization to a treatment group) where they will continue to receive risdiplam monotherapy until randomization. Participants enrolled in Part 1 will receive RO7204239 (low or high dose) + risdiplam for 24 weeks, followed by RO7204239 + risdiplam for 72 weeks. Participants enrolled in Part 2 will receive risdiplam for 8 weeks and then treatment with RO7204239 + risdiplam for 72 weeks. Once the treatment period has completed (Part 1 or Part 2), participants will have the option of treatment with RO7204239 + risdiplam for 2 additional years. Placebo + Risdiplam Risdiplam Participants who have not previously been treated with risdiplam will receive risdiplam for at least 8 weeks prior to randomization into a treatment group (Part 1 only). Participants that have been treated with risdiplam for at least 8 continuous weeks immediately prior to joining the study may be immediately randomized to combination therapy, or join the study run-in period (the period between screening and randomization to a treatment group) where they will continue to receive risdiplam monotherapy until randomization. Participants enrolled in Part 1 will receive placebo (low or high dose-matched) + risdiplam for 24 weeks, followed by RO7204239 + risdiplam for 72 weeks. Participants enrolled in Part 2 will receive risdiplam for 8 weeks and then treatment with placebo + risdiplam for 72 weeks. Once the treatment period has completed (Part 1 or Part 2), participants will have the option of treatment with RO7204239 + risdiplam for 2 additional years.
- Primary Outcome Measures
Name Time Method Part 1 - Trough concentration (Ctrough) of RO7204239 Through Week 96 Part 1 - Plasma concentration of risdiplam Week 21 Part 1 - Plasma concentration of risdiplam metabolite (M1) Week 21 Part 1 - Incidence of relevant echocardiographic parameter z scores > 2 Up to 4.5 years Part 1 - Serum concentration of RO7204239 Through Week 96 Part 1 - Percentage of participants with adverse events (AEs) Up to 4.5 years Part 1 - Time to maximum serum concentration (Cmax) of RO7204239 Through Week 96 Part 1 - Area under the curve (AUC) of RO7204239 Through Week 96 Part 1 - AUC of risdiplam Week 21 Part 1 - Cmax of risdiplam Week 21 Part 1 - Ctrough of risdiplam Week 21 Part 1 - Incidence of anti-drug antibodies (ADAs) Through Week 96 Part 1 - Change from baseline in serum concentration of total myostatin Through Week 85 Part 1 - Change from baseline in serum concentration of free latent myostatin Through Week 85 Part 1 - Change from baseline in serum concentration of mature myostatin Through Week 85 Part 1 - Percent change from baseline in the contractile area of skeletal muscle in the dominant thigh muscles as assessed by magnetic resonance imaging (MRI) in participants aged at least 5 years Week 24 of combination treatment Part 1 - Percent change from baseline in the contractile area of skeletal muscle in the dominant calf muscles as assessed by MRI in participants aged at least 5 years Week 24 of combination treatment Part 2 - Change from baseline in Revised Hammersmith Scale (RHS) total score Week 72 of combination treatment (study Week 80)
- Secondary Outcome Measures
Name Time Method Part 2 - Change from baseline in Motor Function Measure (MFM) Domain 1 + Domain 2 (D1 + D2) score Week 72 of combination treatment (study Week 80) Part 2 - Cmax of RO7204239 Through Week 80 Part 2 - AUC of RO7204239 Through Week 80 Part 2 - Change from baseline in MFM-32 total score Week 72 of combination treatment (study Week 80) Part 2 - Change from baseline in time taken to rise from the floor as measured by RHS Item 25 Week 72 of combination treatment (study Week 80) Part 2 - Change from baseline in time taken to walk/run 10 meters as measured by RHS Item 19 Week 72 of combination treatment (study Week 80) Part 2 - Percent change from baseline in lean mass as assessed by full body dual energy X-ray absorptiometry (DXA) scan in participants aged at least 5 years Week 72 of combination treatment (study Week 80) Part 2 - Plasma concentration of risdiplam Week 32 Part 2 - Plasma concentration of risdiplam metabolite (M1) Week 32 Part 2 - Cmax of risdiplam Week 32 Part 2 - AUC of risdiplam Week 32 Part 2 - Ctrough of risdiplam Week 32 Part 2 - Incidence of ADAs Through Week 80 Part 2 - Percentage of participants with adverse events (AEs) Up to 4.5 years Part 2 - Serum concentration of RO7204239 Through Week 80 Part 2 - Ctrough of RO7204239 Through Week 80
Trial Locations
- Locations (35)
Nemours Children's Hospital
🇺🇸Orlando, Florida, United States
Chr de La Citadelle
🇧🇪Liège, Belgium
Hospital de Santa Maria
🇵🇹Lisboa, Portugal
Boston Childrens Hospital
🇺🇸Boston, Massachusetts, United States
Columbia University Medical Center
🇺🇸New York, New York, United States
Neurology & Neuromuscular Care Center
🇺🇸Denton, Texas, United States
Sydney Children's Hospital
🇦🇺Randwick, New South Wales, Australia
UZ Gent
🇧🇪Gent, Belgium
British Columbia Children's Hospital
🇨🇦Vancouver, British Columbia, Canada
The Hospital for Sick Children
🇨🇦Toronto, Ontario, Canada
McGill University Health Centre - Glen Site
🇨🇦Montreal, Quebec, Canada
Clinical Hospital Centre Zagreb
🇭🇷Zagreb, Croatia
Ospedale Pediatrico Bambino Gesù
🇮🇹Roma, Lazio, Italy
Policlinico Agostino Gemelli
🇮🇹Roma, Lazio, Italy
IRCCS Istituto Giannina Gaslini
🇮🇹Genova, Liguria, Italy
Fondazione IRCCS Istituto Neurologico ?Carlo Besta?
🇮🇹Milano, Lombardia, Italy
Asst Grande Ospedale Metropolitano Niguarda
🇮🇹Milano, Lombardia, Italy
Ospedali Riuniti Torrette di Ancona
🇮🇹Ancona, Marche, Italy
Kobe University Hospital
🇯🇵Hyogo, Japan
Kagoshima University Hospital
🇯🇵Kagoshima, Japan
Center Hospital of the National Center for Global Health and Medicine
🇯🇵Tokyo, Japan
Universitair Medisch Centrum Utrecht
🇳🇱Utrecht, Netherlands
Instytut Centrum Zdrowia Matki Polki
🇵🇱?ód?, Poland
Uniwersyteckie Centrum Kliniczne
🇵🇱Gda?sk, Poland
Uniwersytecki Szpital Kliniczny w Poznaniu
🇵🇱Pozna?, Poland
Klinika Neurologii I Wydzialu Lekarskiego WUM w Warszawie
🇵🇱Warszawa, Poland
Instytut Pomnik Centrum Zdrowia Dziecka
🇵🇱Warszawa, Poland
CHULC, E.P.E. - Hospital Dona Estefania
🇵🇹Lisboa, Portugal
Hospital Sant Joan De Deu
🇪🇸Esplugues De Llobregas, Barcelona, Spain
Hospital Vall d'Hebron
🇪🇸Barcelona, Spain
Hospital Universitario La Paz
🇪🇸Madrid, Spain
Hospital Universitario la Fe
🇪🇸Valencia, Spain
Birmingham Heartlands Hospital
🇬🇧Birmingham, United Kingdom
Great Ormond Street Hospital For Children
🇬🇧London, United Kingdom
John Radcliffe Hospital
🇬🇧Oxford, United Kingdom