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논문 기본 정보

자료유형
학술저널
저자정보
Shim Yeeun (Department of Laboratory Medicine, Graduate School of Medical Sciences, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, KoreaMDxK (Molecular Diagnostics Korea), Inc., G) Seo Jieun (Department of Genetics, School of Medicine, Washington University in St. Louis, St. Louis, MO, USA) Lee Seung-Tae (Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, KoreaDxome Co. Ltd., Seongnam, Korea) Choi Jong Rak (Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, KoreaDxome Co. Ltd., Seongnam, Korea) Choi Young-Chul (Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea) Shin Saeam (Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea) Park Hyung Jun (Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea)
저널정보
대한진단검사의학회 Annals of Laboratory Medicine Annals of Laboratory Medicine 제44권 제5호
발행연도
2024.9
수록면
437 - 445 (9page)
DOI
10.3343/alm.2023.0437

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Background: Facioscapulohumeral muscular dystrophy (FSHD) is a common form of muscular dystrophy that mainly affects skeletal muscle. FSHD1 accounts for 95% of all FSHD cases and can be diagnosed based on the pathogenic contraction of the D4Z4-repeat array on chromosome 4q35. Genetic diagnosis of FSHD1 is challenging because of the large size and repetitive nature of the D4Z4 region. We evaluated the clinical applicability of optical genome mapping (OGM) for the genetic diagnosis of FSHD1. Methods: We included 25 individuals with clinically confirmed or suspected/probable FSHD and their families. Ultra-high-molecular-weight DNA from peripheral blood was labeled, stained, and imaged using a single-molecule OGM platform (Bionano Genomics Saphyr system). D4Z4 repeat size and haplotype information were analyzed using the manufacturer’s dedicated pipeline. We also compared the workflow and test time between Southern blot analysis and OGM. Results: We obtained concordant OGM and Southern blot results with 10 samples from patients with clinically confirmed FSHD. The D4Z4 repeat size differed within 1 unit between the Southern blot analysis and OGM. Among nine patients with clinically suspected or probable FSHD, six patients were confirmed to have pathogenic contractions by OGM. In our cohort, one de novo mosaic FSHD1 patient was successfully diagnosed with OGM. Moreover, OGM has a more straightforward and less time-consuming workflow than Southern blot analysis. Conclusions: OGM enables accurate and reliable detection of pathogenic contraction of the D4Z4-repeat array and is a valuable tool for the genetic diagnosis of FSHD1.

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