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NOTCH2NLC GGC Repeat Expansions Are Associated with Sporadic Essential Tremor: Variable Disease Expressivity on Long-Term Follow-up.
- Source :
- Annals of Neurology; Sep2020, Vol. 88 Issue 3, p614-618, 5p
- Publication Year :
- 2020
-
Abstract
- We screened 662 subjects comprising 462 essential tremor (ET) subjects (285 sporadic, 125 with family history, and 52 probands from well-characterized ET pedigrees) and 200 controls and identified pathogenic NOTCH2NLC GGC repeat expansions in 4 sporadic ET patients. Two patients were followed up for >1 decade; one with 90 repeats remained an ET phenotype that did not evolve after 40 years, whereas another patient with 107 repeats developed motor symptoms and cognitive impairment after 8 to 10 years. Neuroimaging in this patient revealed severe leukoencephalopathy; diffusion-weighted imaging hyperintensity in the corticomedullary junction and skin biopsy revealed intranuclear inclusions suggestive of intranuclear inclusion body disease (NIID). No GGC repeats of >60 units were detected in familial ET cases and controls, although 4 ET patients carried 47 to 53 "intermediate" repeats. NOTCH2NLC GGC repeat expansions can be associated with sporadic ET. Carriers presenting with a pure ET phenotype may or may not convert to NIID up to 4 decades after initial tremor onset. ANN NEUROL 2020;88:614-618. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03645134
- Volume :
- 88
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Annals of Neurology
- Publication Type :
- Academic Journal
- Accession number :
- 145278593
- Full Text :
- https://doi.org/10.1002/ana.25803