Abstract:
:Noncoding repeat expansions cause various neuromuscular diseases, including myotonic dystrophies, fragile X tremor/ataxia syndrome, some spinocerebellar ataxias, amyotrophic lateral sclerosis and benign adult familial myoclonic epilepsies. Inspired by the striking similarities in the clinical and neuroimaging findings between neuronal intranuclear inclusion disease (NIID) and fragile X tremor/ataxia syndrome caused by noncoding CGG repeat expansions in FMR1, we directly searched for repeat expansion mutations and identified noncoding CGG repeat expansions in NBPF19 (NOTCH2NLC) as the causative mutations for NIID. Further prompted by the similarities in the clinical and neuroimaging findings with NIID, we identified similar noncoding CGG repeat expansions in two other diseases: oculopharyngeal myopathy with leukoencephalopathy and oculopharyngodistal myopathy, in LOC642361/NUTM2B-AS1 and LRP12, respectively. These findings expand our knowledge of the clinical spectra of diseases caused by expansions of the same repeat motif, and further highlight how directly searching for expanded repeats can help identify mutations underlying diseases.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Ishiura H,Shibata S,Yoshimura J,Suzuki Y,Qu W,Doi K,Almansour MA,Kikuchi JK,Taira M,Mitsui J,Takahashi Y,Ichikawa Y,Mano T,Iwata A,Harigaya Y,Matsukawa MK,Matsukawa T,Tanaka M,Shirota Y,Ohtomo R,Kowa H,Date H,doi
10.1038/s41588-019-0458-zsubject
Has Abstractpub_date
2019-08-01 00:00:00pages
1222-1232issue
8eissn
1061-4036issn
1546-1718pii
10.1038/s41588-019-0458-zjournal_volume
51pub_type
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