Observational studyNeurology2023
Association of 4qA-Specific Distal D4Z4 Hypomethylation With Disease Severity and Progression in Facioscapulohumeral Muscular Dystrophy.
Observational study in Neurology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 19 citations in OpenAlex.
- Integrated genetic and epigenetic diagnosis of facioscapulohumeral muscular dystrophy using Oxford Nanopore long-read sequencing.Journal of human genetics · 2026Article
- Assessing the multidimensional burden of facioscapulohumeral muscular dystrophy through patient-reported outcomes and experience.Journal of patient-reported outcomes · 2026Observational
- Observational
- Association of Diaphragm Involvement Assessed by Ultrasound With Disease Severity in Facioscapulohumeral Muscular Dystrophy.Journal of cachexia, sarcopenia and muscle · 2025Observational
- Diversity challenges and reconciles genetics in facioscapulohumeral muscular dystrophy.Journal of human genetics · 2025Review
- Disease Progression of GNE Myopathy and Its Relationship With Genotype: A Retrospective, Observational Study in Chinese Patients.Neurology. Genetics · 2024Article
- Molecular, Histological, and Functional Changes in Acta1-MCM;FLExDUX4/+ Mice.International journal of molecular sciences · 2024Article
- Review
- Comprehensive genetic analysis of facioscapulohumeral muscular dystrophy by Nanopore long-read whole-genome sequencing.Journal of translational medicine · 2024Article
- Case report: Identification of facioscapulohumeral muscular dystrophy 1 in two siblings with normal phenotypic parents using optical genome mapping.Frontiers in neurology · 2024Article
- Whole exome sequencing highlights rare variants inFrontiers in genetics · 2023Article
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Authors and funding
18 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
objectivesThe objective of this study was to examine whether the regional methylation levels at the most distal D4Z4 repeat units (RU) in the 4qA-permissive haplotype were associated with disease severity and progression in facioscapulohumeral muscular dystrophy type 1 (FSHD1).
methodsThis 21-year, retrospective, observational cohort study was conducted at the Fujian Neuromedical Center (FNMC) in China. Methylation levels of the most distal D4Z4 RU, including 10 CpGs, were assessed in all participants by bisulfite sequencing. Patients with FSHD1 were stratified into 4 groups based on methylation percentage quartiles, including LM1 (low methylation), LM2 (low to intermediate methylation), LM3 (intermediate to high methylation), and highest methylation (HM) levels. Patients received evaluations of motor function focusing on lower extremity (LE) progression at baseline and in follow-ups. FSHD clinical score (CS), age-corrected clinical severity scale (ACSS), and modified Rankin scale were used to assess motor function.
resultsThe methylation levels of the 10 CpGs were significantly lower in all 823 patients with genetically confirmed FSHD1 than in 341 healthy controls (HCs). CpG6 methylation levels could distinguish the following: (1) patients with FSHD1 from HCs; (2) symptomatic from asymptomatic/unaffected patients; (3) patients with LE involvement from those without LE involvement, with AUCs (95% CI) of 0.9684 (0.9584-0.9785), 0.7417 (0.6903-0.7931), and 0.6386 (0.5816-0.6956), respectively. Lower CpG6 methylation levels were correlated with higher CS (r = -0.392), higher ACSS (r = -0.432), and earlier onset age of first-ever muscle weakness (r = 0.297). For the LM1, LM2, LM3, and HM groups, the respective proportions of LE involvement were 52.9%, 44.2%, 36.9%, and 23.4%; and onset ages of LE involvement were 20, 26.5, 25, and 26.5 years. Cox regression analysis-adjusted for sex, age at examination, D4Z4 RU, and 4qA/B haplotype-showed that the LM1, LM2, and LM3 groups (i.e., groups with lower methylation levels) had a higher risk of independent ambulation loss, with HRs (95% CI) of 3.523 (1.565-7.930), 3.356 (1.458-7.727), and 2.956 (1.245-7.020), respectively. DISCUSSION: 4q35 distal D4Z4 hypomethylation is correlated with disease severity and progression to lower extremity involvement.
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