Myotilin Gene Duplication and Late-Onset Myotilinopathy
Author Information
Author(s): Marco Spinazzi, Marco Savarese, Franck Letournel, Lydia Sagath, Florence Manero, Agnès Guichet, Alexander Hoischen, Corinne Metay, Julien Gouju, Bjarne Udd
Primary Institution: Neuromuscular Reference Center, Department of Neurology CHU d'ANGERS
Hypothesis
Can a duplication of the MYOT gene cause late-onset myotilinopathy?
Conclusion
The study identifies a duplication of the entire MYOT gene as the cause of late-onset myotilinopathy, emphasizing the importance of long-read sequencing in genetic diagnosis.
Supporting Evidence
- The study expands the molecular spectrum of myotilinopathy.
- Long-read sequencing was crucial for diagnosing genetic neurological diseases.
- Clinical features included late-onset distal myopathy and muscle hypertrophy.
- Pathological findings included myotilin aggregates and autophagic vacuoles.
Takeaway
This study found that a gene duplication can cause a rare muscle disease that usually shows up later in life, and special DNA testing can help find it.
Methodology
The study involved clinical, radiological, pathological, and molecular analysis, including long-read sequencing of affected family members.
Limitations
The study is based on a small family sample, which may limit the generalizability of the findings.
Participant Demographics
Two affected patients from a French family, including a 70-year-old man and his brother.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website