RYR1-related myopathy
MONDO:0100150A disorder of the musculoskeletal system caused by pathogenic variants in the RYR1 gene, which encodes the ryanodine receptor type 1 protein. These variants are associated with a variety of overlapping features characterized by symmetric proximal muscle weakness, often with pronounced facial weakness with or without dysmorphism and ophthalmoparesis/ophthalmoplegia with ptosis, bulbar weakness, significant respiratory involvement, severe neonatal hypotonia, scoliosis, orthopedic deformities including arthrogryposis, hip dislocation, club feet, and King Denborough syndrome (pectus carinatum or excavatum, short stature, joint contractures, facial and skeletal deformities), malignant hyperthermia susceptibility, anesthesia-induced rhabdomyolysis, fatigue, exercise-induced hyperthermia/exertional heat stroke, and exertional myalgia. Histologic findings on skeletal muscle biopsy reveal a wide range of structural abnormalities and can include central core disease, multiminicore disease, cone-rod myopathy, centronuclear myopathy, and congenital fiber-type disproportion.
Also known as: RYR1-related disease, RYR1-related disorder, RYR1-related myopathy, neurological muscular channelopathy due to a genetic ryanodine receptor defect
10 clinical trials for this condition and its sub-types.
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Broader categories
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New drug hopes to strengthen muscles in rare genetic disorder
Disease control Recruiting nowThis study tests a medicine called surlorian in 28 adults with a rare genetic muscle disease (RYR1-related myopathy) that causes weakness. The goal is to see if surlorian improves muscle strength and function, like standing from a chair or walking. Participants will be randomly a…
Phase: PHASE2 • Sponsor: RyCarma Therapeutics, Inc. • Aim: Disease control
Last updated Jul 17, 2026 00:00 UTC
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New handheld scanner could replace MRI for muscle disease monitoring
Diagnosis Recruiting nowThis study is testing a handheld device called mScan that uses a tiny, painless electrical current to measure muscle health. Researchers want to see if it can give similar results to an MRI, but faster and more conveniently. The study involves 150 adults with and without muscle d…
Sponsor: Beth Israel Deaconess Medical Center • Aim: Diagnosis
Last updated Jun 27, 2026 12:03 UTC
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Virtual park cycling could slow muscle decline in children
Symptom relief Recruiting nowThis study tests whether cycling while using a virtual park app can slow the loss of motor function in children and teens with neuromuscular diseases like muscular dystrophy. Twenty-two participants will first receive standard care for 3 months, then use the virtual park bike 3 t…
Phase: NA • Sponsor: Istituto di Sistemi e Tecnologie Industriali Intelligenti per il Manifatturiero Avanzato • Aim: Symptom relief
Last updated Aug 13, 2026 00:00 UTC
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New study: longer fasting may cut aspiration danger for GLP-1 users
Knowledge-focused Recruiting nowThis study looks at whether a longer fasting period before an upper endoscopy can lower the risk of stomach contents entering the lungs (aspiration) in people taking GLP-1 receptor agonists (like Ozempic or Wegovy). Researchers at Mayo Clinic will check the stomachs of 150 adults…
Phase: NA • Sponsor: Mayo Clinic • Aim: Knowledge-focused
Last updated Jun 27, 2026 13:00 UTC
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Gene hunt for rare muscle diseases could unlock future treatments
Knowledge-focused Recruiting nowThis research study at Boston Children's Hospital is looking at the genes and proteins involved in congenital myopathies—rare muscle diseases that are present from birth. Researchers will analyze DNA from up to 4,000 participants, including patients and their family members, to f…
Sponsor: Boston Children's Hospital • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:00 UTC
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Simple blood test may predict muscle disease severity
Knowledge-focused Recruiting nowThis study is looking at whether a molecule in the blood called miR-1 can help doctors understand how muscle diseases like Duchenne muscular dystrophy and myotonic dystrophy are progressing. Researchers will compare miR-1 levels in 104 people, including patients with different mu…
Phase: NA • Sponsor: University Hospital, Clermont-Ferrand • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:07 UTC
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New study tracks rare muscle disease to pave way for future treatments
Knowledge-focused Recruiting nowThis study follows 150 people aged 7 and older with RYR1-related muscle disorders for 3 to 5 years. Researchers will collect medical history, perform physical exams, and use questionnaires, activity trackers, and tests of heart, lung, and muscle function. The goal is to better un…
Sponsor: National Institutes of Health Clinical Center (CC) • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:13 UTC
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Wearable tech tracks fatigue in muscle disease patients
Knowledge-focused Recruiting nowThis study aims to find better ways to measure fatigue and walking problems in people with neuromuscular diseases like muscular dystrophy and spinal muscular atrophy. Researchers will use a wearable sensor to track physical activity for one week in daily life and during a walking…
Sponsor: IRCCS Eugenio Medea • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:12 UTC