Abstract:
:Molecular defects in type 1 facioscapulohumeral muscular dystrophy (FSHD) are caused by a heterozygous contraction of the D4Z4 repeat array from 1 to 10 repeat units (RUs) on 4q35. This study compared (1) the phenotype and severity of FSHD1 between patients carrying 6-8 vs. 9-10 RUs, (2) the amount of methylation in different D4Z4 regions between patients with FSHD1 with different clinical severity scores (CSS). This cross-sectional multicenter study was conducted to measure functional scales and for genetic analysis. Patients were classified into two categories according to RUs: Group 1, 6-8; Group 2, 9-10. Methylation analysis was performed in 27 patients. A total of 99 carriers of a contracted D4Z4 array were examined. No significant correlations between RUs and CSS (r = 0.04, p = 0.73) and any of the clinical outcome scales were observed between the two groups. Hypomethylation was significantly more pronounced in patients with high CSS (>3.5) than those with low CSS (<1.5) (in DR1 and 5P), indicating that the extent of hypomethylation might modulate disease severity. In Group 1, the disease severity is not strongly correlated with the allele size and is mostly correlated with the methylation of D4Z4 regions.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Salort-Campana E,Fatehi F,Beloribi-Djefaflia S,Roche S,Nguyen K,Bernard R,Cintas P,Solé G,Bouhour F,Ollagnon E,Sacconi S,Echaniz-Laguna A,Kuntzer T,Levy N,Magdinier F,Attarian Sdoi
10.3390/ijms21062221subject
Has Abstractpub_date
2020-03-23 00:00:00issue
6issn
1422-0067pii
ijms21062221journal_volume
21pub_type
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