ArticleJournal of neuromuscular diseases2024
Clinical and Genetic Heterogeneity of Nuclear Envelopathy Related Muscular Dystrophies in an Indian Cohort.
Article in Journal of neuromuscular diseases, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Molecular Insights and Orthopedic Management in Muscular Dystrophies: A Comprehensive Review.International journal of molecular sciences · 2026Review
- The role of inner nuclear membrane protein emerin in myogenesis.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025Review
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11 authors.
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Abstract
Introduction: Nuclear envelopathies occur due to structural and/or functional defects in various nuclear envelope proteins such as lamin A/C and lamin related proteins. This study is the first report on the phenotype-genotype patterns of nuclear envelopathy-related muscular dystrophies from India. Methods: In this retrospective study, we have described patients with genetically confirmed muscular dystrophy associated with nuclear envelopathy. Data on clinical, laboratory findings and muscle MRI were collected. Results: Sixteen patients were included with median age at onset of 3 years (range: 1 month - 17 years). Three genes were involved: LMNA (11, 68.75%), EMD (4, 25%) and SYNE1 (1, 6.25%). The 11 patients with LMNA variants were Congenital muscular dystrophy (MDCL)=4, Limb Girdle Muscular Dystrophy (LGMD1B)=4 and Emery-Dreifuss Muscular Dystrophy (EDMD2)=3. On muscle biopsy, one patient from each laminopathy phenotype (n = 3) revealed focal perivascular inflammatory infiltrate. Other notable features were ophthalmoparesis in one and facial weakness in one. None had cardiac involvement. Patients with EDMD1 had both upper (UL) and lower limb (LL) proximo-distal weakness. Cardiac rhythm disturbances such as sick sinus syndrome and atrial arrhythmias were noted in two patients with EDMD1. Only one patient with variant c.654_658dup (EMD) lost ambulation in the 3rd decade, 18 years after disease onset. Two had finger contractures with EMD and SYNE1 variants respectively. All patients with LMNA and SYNE1 variants were ambulant at the time of evaluation. Mean duration of illness (years) was 11.6±13 (MDCL), 3.2±1.0 (EDMD2), 10.4±12.8 (LGMD1B), 11.8±8.4 (EDMD1) and 3 (EDMD4). One patient had a novel SYNE1 mutation (c.22472dupA, exon 123) and presented with UL phenotype and prominent finger and wrist contractures. Conclusion: The salient features included ophthalmoparesis and facial weakness in LMNA, prominent finger contractures in EMD and SYNE1 and upper limb phenotype with the novel pathogenic variant in SYNE1.
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