A Cross-sectional Controlled Developmental Study of Neuropsychological Functions in Patients with Glutaric Aciduria Type I

Overview

Journal Orphanet J Rare Dis

Publisher Biomed Central

Specialty General Medicine

Date 2015 Dec 24

PMID 26693825

Citations 8

Authors

Nikolas Boy

Jana Heringer

Gisela Haege

Esther M Glahn

Georg F Hoffmann

Sven F Garbade

Stefan Kolker

Peter Burgard

Affiliations

Soon will be listed here.

Abstract

Background: Glutaric aciduria type I (GA-I) is an inherited metabolic disease due to deficiency of glutaryl-CoA dehydrogenase (GCDH). Cognitive functions are generally thought to be spared, but have not yet been studied in detail.

Methods: Thirty patients detected by newborn screening (n = 13), high-risk screening (n = 3) or targeted metabolic testing (n = 14) were studied for simple reaction time (SRT), continuous performance (CP), visual working memory (VWM), visual-motor coordination (Tracking) and visual search (VS). Dystonia (n = 13 patients) was categorized using the Barry-Albright-Dystonia Scale (BADS). Patients were compared with 196 healthy controls. Developmental functions of cognitive performances were analysed using a negative exponential function model.

Results: BADS scores correlated with speed tests but not with tests measuring stability or higher cognitive functions without time constraints. Developmental functions of GA-I patients significantly differed from controls for SRT and VS but not for VWM and showed obvious trends for CP and Tracking. Dystonic patients were slower in SRT and CP but reached their asymptote of performance similar to asymptomatic patients and controls in all tests. Asymptomatic patients did not differ from controls, except showing significantly better results in Tracking and a trend for slower reactions in visual search. Data across all age groups of patients and controls fitted well to a model of negative exponential development.

Conclusions: Dystonic patients predominantly showed motor speed impairment, whereas performance improved with higher cognitive load. Patients without motor symptoms did not differ from controls. Developmental functions of cognitive performances were similar in patients and controls. Performance in tests with higher cognitive demand might be preserved in GA-I, even in patients with striatal degeneration.

Citing Articles

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Tuncel A, Boy N, Morath M, Horster F, Mutze U, Kolker S J Inherit Metab Dis. 2018; 41(5):765-776.

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Zhang X, Luo Q Exp Ther Med. 2017; 13(2):560-566.

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