Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study.
Dystrophinopathy is a group of inherited phenotypes arising from pathogenic variants in DMD. We evaluated the clinical and genetic characteristics of Korean patients with genetically confirmed dystrophinopathy. We retrospectively reviewed medical records (January 2004-September 2020) from the myopat...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2021-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0255011 |
| _version_ | 1818834318325186560 |
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| author | UnKyu Yun Seung-Ah Lee Won Ah Choi Seong-Woong Kang Go Hun Seo Jung Hwan Lee Goeun Park Sujee Lee Young-Chul Choi Hyung Jun Park |
| author_facet | UnKyu Yun Seung-Ah Lee Won Ah Choi Seong-Woong Kang Go Hun Seo Jung Hwan Lee Goeun Park Sujee Lee Young-Chul Choi Hyung Jun Park |
| author_sort | UnKyu Yun |
| collection | DOAJ |
| description | Dystrophinopathy is a group of inherited phenotypes arising from pathogenic variants in DMD. We evaluated the clinical and genetic characteristics of Korean patients with genetically confirmed dystrophinopathy. We retrospectively reviewed medical records (January 2004-September 2020) from the myopathy database maintained at the study hospital and found 227 patients from 218 unrelated families with dystrophinopathy. Clinical phenotypes included 120 (53%) Duchenne muscular dystrophy (DMD) cases, 20 (9%) intermediate phenotype muscular dystrophy (IMD) cases, 65 (29%) Becker muscular dystrophy (BMD) cases, 18 (8%) undetermined phenotypes, and 4 (2%) symptomatic carriers. The median ages at symptom onset and diagnosis were 5.0 years (interquartile range [IQR]: 3.8-8.0) and 12.0 years (IQR: 7.0-21.0), respectively. Total manual muscle test (MMT) scores decreased annually in patients with DMD, IMD, and BMD. Overall, when age increased by 1 year, total MMT scores decreased on average by -1.978, -1.681, and -1.303 in patients with DMD (p<0.001), IMD (p<0.001), and BMD (p<0.001), respectively. Exonic deletion and duplication were reported in 147 (67%) and 31 (14%) of the 218 unrelated probands, respectively. A total of 37 different small sequence variants were found in 40 (18%) of the 218 probands. The reading frame rule was applicable to 142 (94%) of the 151 probands. The present results highlight the long-term natural history and genetic spectrum of dystrophinopathy in a large-scale Korean cohort. |
| first_indexed | 2024-12-19T02:32:55Z |
| format | Article |
| id | doaj.art-299248817ceb4427a87a729a47009b78 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-19T02:32:55Z |
| publishDate | 2021-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-299248817ceb4427a87a729a47009b782022-12-21T20:39:33ZengPublic Library of Science (PLoS)PLoS ONE1932-62032021-01-01167e025501110.1371/journal.pone.0255011Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study.UnKyu YunSeung-Ah LeeWon Ah ChoiSeong-Woong KangGo Hun SeoJung Hwan LeeGoeun ParkSujee LeeYoung-Chul ChoiHyung Jun ParkDystrophinopathy is a group of inherited phenotypes arising from pathogenic variants in DMD. We evaluated the clinical and genetic characteristics of Korean patients with genetically confirmed dystrophinopathy. We retrospectively reviewed medical records (January 2004-September 2020) from the myopathy database maintained at the study hospital and found 227 patients from 218 unrelated families with dystrophinopathy. Clinical phenotypes included 120 (53%) Duchenne muscular dystrophy (DMD) cases, 20 (9%) intermediate phenotype muscular dystrophy (IMD) cases, 65 (29%) Becker muscular dystrophy (BMD) cases, 18 (8%) undetermined phenotypes, and 4 (2%) symptomatic carriers. The median ages at symptom onset and diagnosis were 5.0 years (interquartile range [IQR]: 3.8-8.0) and 12.0 years (IQR: 7.0-21.0), respectively. Total manual muscle test (MMT) scores decreased annually in patients with DMD, IMD, and BMD. Overall, when age increased by 1 year, total MMT scores decreased on average by -1.978, -1.681, and -1.303 in patients with DMD (p<0.001), IMD (p<0.001), and BMD (p<0.001), respectively. Exonic deletion and duplication were reported in 147 (67%) and 31 (14%) of the 218 unrelated probands, respectively. A total of 37 different small sequence variants were found in 40 (18%) of the 218 probands. The reading frame rule was applicable to 142 (94%) of the 151 probands. The present results highlight the long-term natural history and genetic spectrum of dystrophinopathy in a large-scale Korean cohort.https://doi.org/10.1371/journal.pone.0255011 |
| spellingShingle | UnKyu Yun Seung-Ah Lee Won Ah Choi Seong-Woong Kang Go Hun Seo Jung Hwan Lee Goeun Park Sujee Lee Young-Chul Choi Hyung Jun Park Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study. PLoS ONE |
| title | Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study. |
| title_full | Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study. |
| title_fullStr | Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study. |
| title_full_unstemmed | Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study. |
| title_short | Clinical and genetic spectra in patients with dystrophinopathy in Korea: A single-center study. |
| title_sort | clinical and genetic spectra in patients with dystrophinopathy in korea a single center study |
| url | https://doi.org/10.1371/journal.pone.0255011 |
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