Homozygous Inversion on Chromosome 13 Involving SGCG Detected by Short Read Whole Genome Sequencing in a Patient Suffering from Limb-Girdle Muscular Dystrophy.

Abstract

New techniques in molecular genetic diagnostics now allow for accurate diagnosis in a large proportion of patients with muscular diseases. Nevertheless, many patients remain unsolved, although the clinical history and/or the muscle biopsy give a clear indication of the involved genes. In many cases, there is a strong suspicion that the cause must lie in unexplored gene areas, such as deep-intronic or other non-coding regions. In order to find these changes, next-generation sequencing (NGS) methods are constantly evolving, making it possible to sequence entire genomes to reveal these previously uninvestigated regions. Here, we present a young woman who was strongly suspected of having a so far genetically unsolved sarcoglycanopathy based on her clinical history and muscle biopsy. Using short read whole genome sequencing (WGS), a homozygous inversion on chromosome 13 involving SGCG and LINC00621 was detected. The breakpoint in intron 2 of SGCG led to the absence of γ-sarcoglycan, resulting in the manifestation of autosomal recessive limb-girdle muscular dystrophy 5 (LGMDR5) in the young woman.

• Authors: Natalie Pluta, Sabine Hoffjan, Frederic Zimmer, Cornelia Köhler, Thomas Lücke, Jennifer Mohr, Matthias Vorgerd, Hoa Huu Phuc Nguyen, David Atlan, Beat Wolf, Ann-Kathrin Zaum, Simone Rost
• Journal: Genes (Genes (Basel)) Vol. 13 Issue 10 (Sep 28 2022) ISSN: 2073-4425 [Electronic] Switzerland
• PMID: 36292638 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Sarcoglycans
• SGCG protein, human

Topics

• Humans
• Female
• Sarcoglycans (genetics)
• Chromosomes, Human, Pair 13
• Muscular Dystrophies, Limb-Girdle (diagnosis, genetics)
• Homozygote
• Whole Genome Sequencing