ArticleHuman genomics2024
The cryptic complex rearrangements involving the DMD gene: etiologic clues about phenotypical differences revealed by optical genome mapping.
Article in Human genomics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Clinical diagnosis and genetic analysis of a rare case of Duchenne muscular dystrophy and spinal muscular atrophy.Molecular cytogenetics · 2026Article
- Article
- Genetic Analysis and Reproductive Intervention in a Duchenne Muscular Dystrophy Family With Cryptic Complex Chromosomal Rearrangement Identified by Structural Variation Sequencing.Human mutation · 2026Article
- Optical genome mapping identifies a balanced inversion disrupting DMD in a patient with Duchenne muscular dystrophy.Molecular cytogenetics · 2025Article
- Review
- 46,XY disorders of sex development and muscular dystrophy caused by Xp21 duplication: a case report and literature review.Translational pediatrics · 2024Article
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15 authors.
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Abstract
backgroundDeletion or duplication in the DMD gene is one of the most common causes of Duchenne and Becker muscular dystrophy (DMD/BMD). However, the pathogenicity of complex rearrangements involving DMD, especially segmental duplications with unknown breakpoints, is not well understood. This study aimed to evaluate the structure, pattern, and potential impact of rearrangements involving DMD duplication.
methodsTwo families with DMD segmental duplications exhibiting phenotypical differences were recruited. Optical genome mapping (OGM) was used to explore the cryptic pattern of the rearrangements. Breakpoints were validated using long-range polymerase chain reaction combined with next-generation sequencing and Sanger sequencing.
resultsA multi-copy duplication involving exons 64-79 of DMD was identified in Family A without obvious clinical symptoms. Family B exhibited typical DMD neuromuscular manifestations and presented a duplication involving exons 10-13 of DMD. The rearrangement in Family A involved complex in-cis tandem repeats shown by OGM but retained a complete copy (reading frame) of DMD inferred from breakpoint validation. A reversed insertion with a segmental repeat was identified in Family B by OGM, which was predicted to disrupt the normal structure and reading frame of DMD after confirming the breakpoints.
conclusionsValidating breakpoint and rearrangement pattern is crucial for the functional annotation and pathogenic classification of genomic structural variations. OGM provides valuable insights into etiological analysis of DMD/BMD and enhances our understanding for cryptic effects of complex rearrangements.
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