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Mutations in THAP1, a gene encoding a nuclear pro-apoptotic protein, have been associated with DYT6 dystonia. First reports on the phenotype of DYT6 dystonia show an early onset dystonia with predominant cranio-cervical and laryngeal involvement. Here we assessed the frequency and phenotype of THAP1 mutation carriers in a large Dutch cohort of adult-onset (≥26 years) dystonia (n = 388) and early-onset dystonia (n = 67) patients. We describe the phenotype of DYT6 dystonia patients and their response on GPi DBS. Overall, 3 nonsynonymous heterozygous mutations were detected in the early-onset group (4.5%). Two DYT6 families were identified, showing a heterozygous phenotype. All patients had segmental or generalized dystonia, often associated with profound oromandibular and laryngeal involvement. No nonsynonymous mutations were found in patients with adult-onset focal dystonia. Rare synonymous variants were identified in conserved regions of THAP1, two in the adult-onset cervical dystonia group and one in the control group. Four DYT6 dystonia patients were treated with GPi DBS with moderate to good response on motor function but marginal benefit on speech.
Department of Neurology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
This article was published in the following journal.
Name: Movement disorders : official journal of the Movement Disorder Society
Primary generalized dystonia (PGD) is a genetic form of dystonia that frequently displays pharmacological resistance and progresses quickly after onset. Deep brain stimulation (DBS) has been used succ...
Dystonia often has inconsistent benefits and requires more energy-demanding DBS settings. Studies suggest that squared biphasic pulses could provide significant clinical benefit; however, dystonia pat...
To develop a process to improve patient outcomes from deep brain stimulation (DBS) surgery for Parkinson disease (PD), essential tremor (ET), and dystonia.
The threshold current for inducing muscle contractions by stimulation of pyramidal tract fibres adjacent to the globus pallidus internus (GPi) is, besides microelectrode recordings for the determinati...
RATIONALE: Dystonia is a disorder in which the muscles that control voluntary movements are persistently or intermittently contracted (not relaxed). Deep brain stimulation is provided by a...
To compile characteristics of real-world outcomes of Boston Scientific Corporation's commercially approved VerciseTM Deep Brain Stimulation (DBS) Systems for the treatment of dystonia.
The purpose of this study is to allow patients to undergo deep brain stimulation (DBS) surgery for the treatment of dystonia. This is NOT a research study, but rather, a requirement by th...
The purpose of this study is to evaluate the safety and effectiveness of deep brain stimulation (DBS) of the subthalamic nucleus (STN)for dystonia.
Dystonia is increasingly being considered as a multi-nodal network disorder involving both basal ganglia and cerebellar dysfunction. The aim of this study is to determine if "Multi-Target"...
Mutation process that restores the wild-type PHENOTYPE in an organism possessing a mutationally altered GENOTYPE. The second "suppressor" mutation may be on a different gene, on the same gene but located at a distance from the site of the primary mutation, or in extrachromosomal genes (EXTRACHROMOSOMAL INHERITANCE).
Genes that have a suppressor allele or suppressor mutation (SUPPRESSION, GENETIC) which cancels the effect of a previous mutation, enabling the wild-type phenotype to be maintained or partially restored. For example, amber suppressors cancel the effect of an AMBER NONSENSE MUTATION.
The identification of selected parameters in newborn infants by various tests, examinations, or other procedures. Screening may be performed by clinical or laboratory measures. A screening test is designed to sort out healthy neonates (INFANT, NEWBORN) from those not well, but the screening test is not intended as a diagnostic device, rather instead as epidemiologic.
A screening phenotype consisting of both elevated WAIST CIRCUMFERENCE and elevated fasting TRIGLYCERIDES level.
This type of gonadal defect is characterized by a female phenotype, normal to tall stature, bilateral streak or dysgenetic gonads, and a 46,XY karyotype. This XY gonadal dysgenesis is a heterogenous condition with variant forms resulting from a structural abnormality on Y chromosome, a mutation in SRY gene or a mutation in autosomal genes. The syndrome is sometimes called "pure gonadal dysgenesis," but this designation may also refer to gonadal dysgenesis with a 46,XX karyotype (GONADAL DYSGENESIS, 46,XX).
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