Abstract Details

Title MANATEE: A Study of RO7204239 in Combination with Risdiplam Treatment in Pediatric Patients with SMA

Topic Child Neurology and Developmental Neurology

Presentation(s) P16 - Poster Session 16 (8:00 AM-9:00 AM)

Poster/Presentation
Number 6-002

Objective To assess safety, tolerability and pharmacokinetics/pharmacodynamics of different doses of the investigational, recycling and antigen-sweeping monoclonal anti-myostatin antibody RO7204239 (myostatin is a negative regulator of skeletal muscle growth) in combination with risdiplam in patients with spinal muscular atrophy (SMA).

Background

Disease-modifying treatments for patients with SMA that directly target the deficiency of survival of motor neuron (SMN) protein have now been approved in over 50 countries. While these treatments have positively impacted the disease trajectory, treated patients may continue to experience motor deficiencies.

Risdiplam (EVRYSDI®) is a centrally and peripherally distributed, oral SMN2 pre-mRNA splicing modifier that has been approved by the FDA for the treatment of patients with SMA, aged ≥2 months.

Design/Methods MANATEE (BN42644) is a multicenter, two-part, randomized, placebo-controlled, double-blind study that will investigate the effect of RO7204239 in combination with risdiplam in treatment-naïve and non-treatment-naïve ambulant patients, aged 2–10 years at screening. Part 1 (target enrollment N~36) will assess safety, tolerability and pharmacokinetics/pharmacodynamics of different RO7204239 doses in combination with risdiplam. Part 2 (target enrollment N~144) will assess efficacy and safety of the Part 1-selected dose of RO7204239 in combination with risdiplam.

Results

Risdiplam has demonstrated clinically meaningful benefit in patients with SMA and there have been no treatment-related safety findings leading to treatment withdrawal in the risdiplam studies to date. In a mouse model of SMA, the combination of RO7204239 and an SMN2 splicing modifier was found to further improve muscle size and strength compared with treatment with SMN2 splicing modifier treatment alone. This approach may lead to a complementary effect on improvement of skeletal muscle atrophy/weakness. Here, we present the study design of the MANATEE study.

Conclusions This study will provide valuable information about safety and efficacy of RO7204239 in combination with risdiplam treatment in ambulant pediatric patients with SMA.

Authors/Disclosures
Tina Duong PRESENTER	Tina Duong has received personal compensation for serving as an employee of Roche. Tina Duong has received personal compensation for serving as an employee of Novartis. Tina Duong has received personal compensation for serving as an employee of Scholar Rock. Tina Duong has received personal compensation for serving as an employee of Genentech. Tina Duong has received personal compensation for serving as an employee of Novartis. Tina Duong has received personal compensation for serving as an employee of Sarepta. Tina Duong has received personal compensation for serving as an employee of Biogen. Tina Duong has received personal compensation for serving as an employee of Audentes. Tina Duong has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Roche. Tina Duong has received personal compensation in the range of $0-$499 for serving as a Consultant for Audentes. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Novartis. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Genentech. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sarepta. Tina Duong has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for biogen. The institution of Tina Duong has received research support from biogen. The institution of Tina Duong has received research support from scholar rock.
Basil T. Darras, MD (Children'S Hosp Boston Harvard Med School)	The institution of Dr. Darras has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Amicus. Dr. Darras has received personal compensation in the range of $0-$499 for serving on a Scientific Advisory or Data Safety Monitoring board for Amicus. The institution of Dr. Darras has received research support from National Institutes of Health/National Institute of Neurological Disorders and Stroke,. The institution of Dr. Darras has received research support from Slaney Family Fund for SMA. The institution of Dr. Darras has received research support from Spinal Muscular Atrophy Foundation. The institution of Dr. Darras has received research support from CureSMA. The institution of Dr. Darras has received research support from Working on Walking Fund . The institution of Dr. Darras has received research support from CHERISH, CS2/CS12 . The institution of Dr. Darras has received research support from Biogen for CS11. The institution of Dr. Darras has received research support from AveXis. The institution of Dr. Darras has received research support from Sarepta Pharmaceuticals. The institution of Dr. Darras has received research support from PTC Therapeutics. The institution of Dr. Darras has received research support from Roche. The institution of Dr. Darras has received research support from Santhera. The institution of Dr. Darras has received research support from Scholar Rock. The institution of Dr. Darras has received research support from Fibrogen. The institution of Dr. Darras has received research support from Summit. Dr. Darras has received publishing royalties from a publication relating to health care. Dr. Darras has received publishing royalties from a publication relating to health care.
Jasper Morrow, MD (William Goodenough House)	The institution of Dr. Morrow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. The institution of Dr. Morrow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. The institution of Dr. Morrow has received research support from Muscular Dystrophy Association.
Francesco Muntoni, MD (UCL Institute of Child Health)	Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sarepta. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Pfizer. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sarepta. Dr. Muntoni has received personal compensation in the range of $0-$499 for serving on a Speakers Bureau for Biogen. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. The institution of Dr. Muntoni has received research support from European Commission. The institution of Dr. Muntoni has received research support from Medical Research Council. The institution of Dr. Muntoni has received research support from Biogen. The institution of Dr. Muntoni has received research support from Muscular Dystrophy UK. The institution of Dr. Muntoni has received research support from MDA USA. The institution of Dr. Muntoni has received research support from Sarepta. The institution of Dr. Muntoni has received research support from Association Francoise Myopathies. Dr. Muntoni has received personal compensation in the range of $0-$499 for serving as a Clinical expert with UK NICE Committee.
Laurent Servais (John Radcliffe Hospital)	Laurent Servais has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Biogen. Laurent Servais has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Roche. Laurent Servais has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Novartis. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Astellas. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Pfizer. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sarepta. The institution of Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Evox. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for PTC. Laurent Servais has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sysnav. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for BioHaven. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Dyne. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Zentech. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for MitoRx. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Lupin. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Fibrogen. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Alltrana. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Illumina. Laurent Servais has received personal compensation in the range of $10,000-$49,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. The institution of Laurent Servais has received research support from Roche. The institution of Laurent Servais has received research support from Novartis. The institution of Laurent Servais has received research support from Biogen. The institution of Laurent Servais has received research support from Zentech. The institution of Laurent Servais has received research support from BioHaven. The institution of Laurent Servais has received research support from PerkinHalmers. The institution of Laurent Servais has received research support from Scholar Rock.
	No disclosure on file
	No disclosure on file
Heidemarie Kletzl	Heidemarie Kletzl has received personal compensation for serving as an employee of Hoffmann-La Roche.
	No disclosure on file
	No disclosure on file
	No disclosure on file
	No disclosure on file

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