Nonmotor Symptoms in Dopa-Responsive Dystonia
Overview
Affiliations
Background: Dopa-responsive dystonia (DRD) is a rare inherited dystonia, caused by an autosomal dominantly inherited defect in the gene that encodes guanosine triphosphate cyclohydrolase 1. It catalyzes the first and rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin, which is the essential co-factor for aromatic amino acid hydroxylases. Mutation results in the typical scenario of a young-onset lower-limb dystonia with diurnal fluctuations, concurrent or subsequent development of parkinsonism and excellent response to levodopa. Given the myriad functions of tetrahydrobiopterin, it is reasonable that other systems, apart from motor, would also be impaired. So far, non-motor symptoms have been overlooked and very few and often contrasting data are currently available on the matter.
Methods: Here by searching the Medline database for publications between 1971 to March 2015, we render an in-depth analysis of all published data on non-motor symptoms in DRD.
Results: Depression and subtle sleep quality impairment have been reported among the different cohorts, while current data do not support any alterations of the cardiologic and autonomic systems. However, there is debate about the occurrence of sleep-related movement disorders and cognitive function. Non-motor symptoms are instead frequently reported among the clinical spectrum of other neurotransmitter disorders which may sometimes mimic DRD phenotype, ie, DRD plus diseases.
Conclusions: Further studies in larger and treatment-naïve cohorts are needed to better elucidate the extend of non-motor symptoms in DRD and also to consider treatment for these.
Segawa Syndrome, a Dramatic Response to Dopamine.
Dhungel O, Shrestha A, Sharma P, Sapkota N, Paudel R Case Rep Neurol Med. 2024; 2024:8154006.
PMID: 38590786 PMC: 10999293. DOI: 10.1155/2024/8154006.
Myoclonus-Dystonic Presentation of Childhood Onset DYT-GCH1: A Report From India.
Sharma P, Holla V, Gurram S, Kamble N, Yadav R, Pal P J Mov Disord. 2023; 16(1):101-103.
PMID: 36628429 PMC: 9978263. DOI: 10.14802/jmd.22106.
Neuropsychiatric and sleep study in autosomal dominant dopa-responsive dystonia.
Alves Junior A, Daker M, Machado A, Luna A, Valladares Neto D, Valadares E Mol Genet Metab Rep. 2022; 31:100870.
PMID: 35782624 PMC: 9248209. DOI: 10.1016/j.ymgmr.2022.100870.
Recognizing Atypical Dopa-Responsive Dystonia and Its Mimics.
Salles P, Teran-Jimenez M, Vidal-Santoro A, Chana-Cuevas P, Kauffman M, Espay A Neurol Clin Pract. 2022; 11(6):e876-e884.
PMID: 34992971 PMC: 8723939. DOI: 10.1212/CPJ.0000000000001125.
Nygaard G, Szigetvari P, Grindheim A, Ruoff P, Martinez A, Haavik J J Pers Med. 2021; 11(11).
PMID: 34834538 PMC: 8625014. DOI: 10.3390/jpm11111186.