Electroclinical Features of Epilepsy in Mucopolysaccharidosis III: Outcome Description in a Cohort of 15 Italian Patients.

Autor:	Barone R; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy.; Regional Referral Centre for Inborn Errors Metabolism, University Children Hospital, Policlinico San Marco, Catania, Italy., Fiumara A; Regional Referral Centre for Inborn Errors Metabolism, University Children Hospital, Policlinico San Marco, Catania, Italy.; Paediatric Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Gulisano M; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Cirnigliaro L; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Cocuzza MD; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Guida C; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Pettinato F; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Greco F; Paediatric Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy., Elia M; Oasi Research Institute, Istituto di Ricerca a Carattere Scientifico (IRCCS), Troina, Italy., Rizzo R; Child Neurology and Psychiatry Section, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy.
Jazyk:	angličtina
Zdroj:	Frontiers in neurology [Front Neurol] 2021 Jul 19; Vol. 12, pp. 705423. Date of Electronic Publication: 2021 Jul 19 (Print Publication: 2021).
DOI:	10.3389/fneur.2021.705423
Abstrakt:	Mucopolysaccharidosis III (Sanfilippo syndromes) types A-D are rare lysosomal storage disorders characterized by heparan sulfate accumulation and neurodegeneration. Patients with MPS III present with developmental stagnation and/or regression, sleep disturbance, and behavioral abnormalities usually in the first years of life. Epilepsy may occur in a proportion of patients during the disease course. However, the progression of epilepsy and EEG changes in MPS III have not been systematically investigated. We report electroclinical features in a cohort of patients with MPS III over a follow-up period ranging from 6.5 to 22 years. Participants include 15 patients (11 females; aged 7-31 years) with MPS III A ( n = 7, 47%), MPS III B ( n = 5, 34%), MPS III C ( n = 2, 13%), and MPS III D ( n = 1, 6%). At the time of this study, 8 out of 15 patients (53%) had epilepsy. Epilepsy occurred in patients with advanced disease even in the first decade of life (mean age at onset: 12.1 ± 6.7 years). However, seizure onset may also be associated with abrupt worsening of the neurobehavioral phenotype. The main epilepsy types observed were generalized (four out of eight, 50%), followed by focal (three out of eight, 37%) and combined (two out of eight, 25%) epilepsy and status epilepticus (one out of eight, 12.5%). Seizures were generally controlled by one antiepileptic drug (AED) and most patients (seven out of eight, 87%) were still on therapy after a median follow-up period of 5 years (range: 1-9 years). A total of 66 EEGs were analyzed with a median EEG follow-up duration of 7 years (range: 6 months-14 years). Slowing of the background activity occurred in 7 (46%) patients aged 4-19 years. Epileptiform EEG abnormalities were observed in 10 patients at a mean age of 9.6 ± 2.9 years. EEG epileptiform discharges were not unavoidably linked to epilepsy. Early recognition and careful monitoring of electroclinical features in MPS III is necessary for appropriate care and for the detection of disease progression. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2021 Barone, Fiumara, Gulisano, Cirnigliaro, Cocuzza, Guida, Pettinato, Greco, Elia and Rizzo.)
Databáze:	MEDLINE
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