TY  - JOUR
A1  - Müller, Stefanie H.
A1  - Girard, Simon L.
A1  - Hopfner, Franziska
A1  - Merner, Nancy D.
A1  - Bourassa, Cynthia V.
A1  - Lorenz, Delia
A1  - Clark, Lorraine N.
A1  - Tittmann, Lukas
A1  - Soto-Ortolaza, Alexandra I.
A1  - Klebe, Stephan
A1  - Hallett, Mark
A1  - Schneider, Susanne A.
A1  - Hodgkinson, Colin A.
A1  - Lieb, Wolfgang
A1  - Wszolek, Zbigniew K.
A1  - Pendziwiat, Manuela
A1  - Lorenzo-Betancor, Oswaldo
A1  - Poewe, Werner
A1  - Ortega-Cubero, Sara
A1  - Seppi, Klaus
A1  - Rajput, Alex
A1  - Hussl, Anna
A1  - Rajput, Ali H.
A1  - Berg, Daniela
A1  - Dion, Patrick A.
A1  - Wurster, Isabel
A1  - Shulman, Joshua M.
A1  - Srulijes, Karin
A1  - Haubenberger, Dietrich
A1  - Pastor, Pau
A1  - Vilariño-Güell, Carles
A1  - Postuma, Ronald B.
A1  - Bernard, Geneviève
A1  - Ladwig, Karl-Heinz
A1  - Dupré, Nicolas
A1  - Jankovic, Joseph
A1  - Strauch, Konstantin
A1  - Panisset, Michel
A1  - Winkelmann, Juliane
A1  - Testa, Claudia M.
A1  - Reischl, Eva
A1  - Zeuner, Kirsten E.
A1  - Ross, Owen A.
A1  - Arzberger, Thomas
A1  - Chouinard, Sylvain
A1  - Deuschl, Günther
A1  - Louis, Elan D.
A1  - Kuhlenbäumer, Gregor
A1  - Rouleau, Guy A.
T1  - Genome-wide association study in essential tremor identifies three new loci
JF  - Brain
N2  - We conducted a genome-wide association study of essential tremor, a common movement disorder characterized mainly by a postural and kinetic tremor of the upper extremities. Twin and family history studies show a high heritability for essential tremor. The molecular genetic determinants of essential tremor are unknown. We included 2807 patients and 6441 controls of European descent in our two-stage genome-wide association study. The 59 most significantly disease-associated markers of the discovery stage were genotyped in the replication stage. After Bonferroni correction two markers, one (rs10937625) located in the serine/threonine kinase STK32B and one (rs17590046) in the transcriptional coactivator PPARGC1A were associated with essential tremor. Three markers (rs12764057, rs10822974, rs7903491) in the cell-adhesion molecule CTNNA3 were significant in the combined analysis of both stages. The expression of STK32B was increased in the cerebellar cortex of patients and expression quantitative trait loci database mining showed association between the protective minor allele of rs10937625 and reduced expression in cerebellar cortex. We found no expression differences related to disease status or marker genotype for the other two genes. Replication of two lead single nucleotide polymorphisms of previous small genome-wide association studies (rs3794087 in SLC1A2, rs9652490 in LINGO1) did not confirm the association with essential tremor.
KW  - quality-control
KW  - disease
KW  - tool
KW  - movement disorders
KW  - genome-wide association study
KW  - tremor
KW  - genetics
KW  - essential tremor
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-186541
VL  - 139
ER  - 
TY  - JOUR
A1  - Canessa, Andrea
A1  - Pozzi, Nicolò G.
A1  - Arnulfo, Gabriele
A1  - Brumberg, Joachim
A1  - Reich, Martin M.
A1  - Pezzoli, Gianni
A1  - Ghilardi, Maria F.
A1  - Matthies, Cordula
A1  - Steigerwald, Frank
A1  - Volkmann, Jens
A1  - Isaias, Ioannis U.
T1  - Striatal Dopaminergic Innervation Regulates Subthalamic Beta-Oscillations and Cortical-Subcortical Coupling during Movements: Preliminary Evidence in Subjects with Parkinson's Disease
JF  - Frontiers in Human Neuroscience
N2  - Activation of the basal ganglia has been shown during the preparation and execution of movement. However, the functional interaction of cortical and subcortical brain areas during movement and the relative contribution of dopaminergic striatal innervation remains unclear. We recorded local field potential (LFP) activity from the subthalamic nucleus (STN) and high-density electroencephalography (EEG) signals in four patients with Parkinson’s disease (PD) off dopaminergic medication during a multi-joint motor task performed with their dominant and non-dominant hand. Recordings were performed by means of a fully-implantable deep brain stimulation (DBS) device at 4 months after surgery. Three patients also performed a single-photon computed tomography (SPECT) with [123I]N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl)nortropane (FP-CIT) to assess striatal dopaminergic innervation. Unilateral movement execution led to event-related desynchronization (ERD) followed by a rebound after movement termination event-related synchronization (ERS) of oscillatory beta activity in the STN and primary sensorimotor cortex of both hemispheres. Dopamine deficiency directly influenced movement-related beta-modulation, with greater beta-suppression in the most dopamine-depleted hemisphere for both ipsi- and contralateral hand movements. Cortical-subcortical, but not interhemispheric subcortical coherencies were modulated by movement and influenced by striatal dopaminergic innervation, being stronger in the most dopamine-depleted hemisphere. The data are consistent with a role of dopamine in shielding subcortical structures from an excessive cortical entrapment and cross-hemispheric coupling, thus allowing fine-tuning of movement.
KW  - beta oscillations
KW  - Parkinson’s disease
KW  - motor control
KW  - movement disorders
KW  - imaging
KW  - subthalamic nucleus
KW  - coherence analysis
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-164061
VL  - 10
IS  - 611
ER  -