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https://www.readbyqxmd.com/read/29150884/directional-local-field-potentials-a-tool-to-optimize-deep-brain-stimulation
#1
Gerd Tinkhauser, Alek Pogosyan, Ines Debove, Andreas Nowacki, Syed Ahmar Shah, Kathleen Seidel, Huiling Tan, John-Stuart Brittain, Katrin Petermann, Lazzaro di Biase, Markus Oertel, Claudio Pollo, Peter Brown, Michael Schuepbach
BACKGROUND: Although recently introduced directional DBS leads provide control of the stimulation field, programing is time-consuming. OBJECTIVES: Here, we validate local field potentials recorded from directional contacts as a predictor of the most efficient contacts for stimulation in patients with PD. METHODS: Intraoperative local field potentials were recorded from directional contacts in the STN of 12 patients and beta activity compared with the results of the clinical contact review performed after 4 to 7 months...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150873/survival-in-patients-with-parkinson-s-disease-after-deep-brain-stimulation-or-medical-management
#2
Frances M Weaver, Kevin T Stroupe, Bridget Smith, Beverly Gonzalez, Zhiping Huo, Lishan Cao, Dolores Ippolito, Kenneth A Follett
OBJECTIVE: Deep brain stimulation has been shown to have a significant long-term beneficial effect on motor function. However, whether it affects survival is not clear. In this study, we compared survival rates for Parkinson's disease (PD) patients who underwent deep brain stimulation (DBS) with those who were medically managed. METHODS: A retrospective analysis of Veterans Affairs and Medicare administrative data of veterans with PD who received DBS and were propensity score matched to a cohort of veterans with PD who did not receive DBS between 2007-2013...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150872/predicting-the-onset-of-freezing-of-gait-a-longitudinal-study
#3
Kaylena A Ehgoetz Martens, Emily L Lukasik, Matthew J Georgiades, Moran Gilat, Julie M Hall, Courtney C Walton, Simon J G Lewis
BACKGROUND: Freezing of gait is a disabling symptom of Parkinson's disease that ultimately affects approximately 80% of patients, yet very little research has focused on predicting the onset of freezing of gait and tracking the longitudinal progression of symptoms prior to its onset. The objective of the current study was to examine longitudinal data spanning the transition period when patients with PD developed freezing of gait to identify symptoms that may precede freezing and create a prediction model that identifies those "at risk" for developing freezing of gait in the year to follow...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150865/enhanced-mu-opioid-receptor-dependent-opioidergic-modulation-of-striatal-cholinergic-transmission-in-dyt1-dystonia
#4
Giulia Ponterio, Annalisa Tassone, Giuseppe Sciamanna, Valentina Vanni, Maria Meringolo, Massimo Santoro, Nicola Biagio Mercuri, Paola Bonsi, Antonio Pisani
BACKGROUND: Mu opioid receptor activation modulates acetylcholine release in the dorsal striatum, an area deeply involved in motor function, habit formation, and reinforcement learning as well as in the pathophysiology of different movement disorders, such as dystonia. Although the role of opioids in drug reward and addiction is well established, their involvement in motor dysfunction remains largely unexplored. METHODS: We used a multidisciplinary approach to investigate the responses to mu activation in 2 mouse models of DYT1 dystonia (Tor1a(+/Δgag) mice, Tor1a(+/-) torsinA null mice, and their respective wild-types)...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150860/quality-of-life-outcomes-after-subthalamic-stimulation-in-parkinson-s-disease-depends-on-age
#5
Haidar S Dafsari, Paul Reker, Lisa Stalinski, Monty Silverdale, Alexandra Rizos, Keyoumars Ashkan, Michael T Barbe, Gereon R Fink, Julian Evans, Julia Steffen, Michael Samuel, Till A Dembek, Veerle Visser-Vandewalle, Angelo Antonini, K Ray-Chaudhuri, Pablo Martinez-Martin, Lars Timmermann
OBJECTIVE: The purpose of this study was to investigate how quality of life outcome after bilateral subthalamic nucleus (STN) deep brain stimulation (DBS) in Parkinson's disease (PD) depends on age. METHODS: In this prospective, open-label, multicenter study including 120 PD patients undergoing bilateral STN-DBS, we investigated the PDQuestionnaire-8 (PDQ-8), Unified PD Rating Scale-III, Scales for Outcomes in PD-motor examination, complications, activities of daily living, and levodopa equivalent daily dose preoperatively and at 5 months follow-up...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150520/dopaminergic-neurotoxins-induce-cell-death-by-attenuating-nf-%C3%AE%C2%BAb-mediated-regulation-of-trpc1-expression-and-autophagy
#6
Pramod Sukumaran, Yuyang Sun, Neil Antonson, Brij B Singh
Alterations in Ca(2+) homeostasis affect neuronal survival. However, the identity of Ca(2+) channels and the mechanisms underlying neurotoxin-induced neuronal degeneration are not well understood. In this study, the dopaminergic neurotoxins 6-hydroxydopamine (6-OHDA) and 1-methyl -4-phenylpyridium ions (MPP(+)/MPTP), which mimic Parkinson's disease (PD), induced neuronal degeneration by decreasing store-mediated Ca(2+) entry. The function of the transient receptor potential canonical (TRPC)-1 channel was decreased upon exposure to the neurotoxins, followed by a decrease in TRPC1 expression...
November 17, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29150478/early-versus-late-application-of-subthalamic-deep-brain-stimulation-to-parkinson-s-disease-patients-with-motor-complications-elass-protocol-of-a-multicentre-prospective-and-observational-study
#7
Lulu Jiang, Wai Sang Poon, Elena Moro, Wenbiao Xian, Chao Yang, Xian Lun Zhu, Jing Gu, Xiaodong Cai, Jinlong Liu, Vincent Mok, Yanmei Liu, Shaohua Xu, Qiyu Guo, Wanru Chen, Ling Chen
INTRODUCTION: Deep brain stimulation (DBS) of the subthalamic nucleus (STN) is a well-established surgical treatment for Parkinson's disease (PD). However, there is currently no consensus on the best timing for this surgery. The aim of our study is to compare the therapeutic efficacy of bilateral STN DBS in patients with PD with early and late motor complications. METHODS AND ANALYSIS: 200 patients with PD will be enrolled in this multicentre, prospective, observational study, and will be followed up for 4 years...
November 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/29150384/the-effect-of-sensory-motor-training-on-hand-and-upper-extremity-sensory-and-motor-function-in-patients-with-idiopathic-parkinson-disease
#8
Ghorban Taghizadeh, Akram Azad, Sepiede Kashefi, Soheila Fallah, Fatemeh Daneshjoo
STUDY DESIGN: Blinded randomized controlled trial. INTRODUCTION: Patients with Parkinson disease (PD) have sensory problems, but there is still no accurate understanding of the effects of sensory-motor interventions on PD. PURPOSE OF THE STUDY: To investigate the effects of sensory-motor training (SMT) on hand and upper extremity sensory and motor function in patients with PD. METHODS: Forty patients with PD were allocated to the SMT group or the control group (CG) (mean ages ± standard deviation: SMT, 61...
November 14, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/29150334/a-routinely-used-protein-staining-dye-acts-as-an-inhibitor-of-wild-type-and-mutant-alpha-synuclein-aggregation-and-modulator-of-neurotoxicity
#9
Nuzhat Ahsan, Ibrar Ahmed Siddique, Sarika Gupta, Avadhesha Surolia
Inhibition of amyloid formation along with modulation of toxicity employing small molecules is emerging as a potential therapeutic approach for protein misfolding disorders which includes Parkinson's disease, Alzheimer's disease and Multiple System Atrophy etc. Countless current interventional strategies for treating α-synucleinopathies consider using peptidic and non-peptidic inhibitors for arresting fibrillisation, disrupting existing fibrils and reducing associated toxicity. One group of molecules less exploited in this regard are triphenylmethane dyes...
October 12, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29150272/proposed-biochemistry-of-parkinson-s-and-alzheimer-s-diseases
#10
D S Robertson
The formation of brain compounds linked to Parkinson's and Alzheimer's brain diseases are described. Metabolic mechanisms involved in the control of reacting biochemicals are detailed. Relationships are established between the biochemical reactions, biochemical control mechanisms and the onset of Parkinson's, Alzheimer's. Treatments based on these relationships are proposed.
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29149825/dopamine-agonists-and-neurodegenerative-disorders
#11
Saba Khanam, Yasir Hasan Siddique
Parkinson's disease (PD) is a neurodegenerative disease characterized by the loss of dopaminergic neurons within the substantia nigra pars compacta. Despite of many researches, there is still no cure for this disease. Levodopa is first line treatment of PD, but the long term use of it leads to motor impairments and dyskinesias. The dopamine agonists are the preferred choice for the treatment of PD. They are neuroprotective in nature but also have side effects. In this review, we highlighted the metabolism of dopamine, different types of dopamine agonists with their properties and possible side effects...
November 17, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/29149768/mitochondrial-dna-changes-in-pedunculopontine-cholinergic-neurons-in-parkinson-s
#12
Alexander G Bury, Angela Pyle, Joanna L Elson, Laura Greaves, Christopher M Morris, Gavin Hudson, Ilse S Pienaar
In Parkinson's disease (PD), mitochondrial dysfunction associates with nigral dopaminergic neuronal loss. Cholinergic neuronal loss co-occurs, particularly within a brainstem structure, the pedunculopontine nucleus (PPN). We isolated single cholinergic neurons from post-mortem PPNs of aged controls and PD patients. Mitochondrial DNA (mtDNA) copy number and mtDNA deletions were increased significantly in PD patients compared to controls. Furthermore, compared to controls the PD patients had significantly more PPN cholinergic neurons containing mtDNA deletion levels exceeding 60%, a level associated with deleterious effects on oxidative phosphorylation...
November 17, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29149763/formulation-and-anti-neurotoxic-activity-of-baicalein-incorporating-neutral-nanoliposome
#13
Farhang Aliakbari, Ali Akbar Shabani, Hassan Bardania, Hossein Mohammad-Beigi, Amir Tayaranian Marvian, Faezeh Dehghani Esmatabad, Abbas Ali Vafaei, Seyed Abbas Shojaosadati, Ali Akbar Saboury, Gunna Christiansen, Daniel E Otzen, Dina Morshedi
Despite extensive studies of the effects of herbal-derived small molecules in the biopharmaceutical and biomedical sciences, their low solubility and stability remain a challenge. Here we focus on baicalein, a small molecule showing potential against neurodegenerative diseases such as Parkinson's and Alzheimer's. However, therapeutic usage in vivo is challenged by low solubility and stability. To address this we have applied neutrally-charged nanoliposome (NLP) as carrier for baicalein. Baicalein was incorporated into NLP to form NLP-Ba at molar baicalain:lipid ratios of up to 1:3, giving a drug entrapment efficiency of 96...
November 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29149290/discovering-the-3-utr-mediated-regulation-of-alpha-synuclein
#14
Domenica Marchese, Teresa Botta-Orfila, Davide Cirillo, Juan Antonio Rodriguez, Carmen Maria Livi, Rubén Fernández-Santiago, Mario Ezquerra, Maria J Martí, Elias Bechara, Gian Gaetano Tartaglia
Recent evidence indicates a link between Parkinson's Disease (PD) and the expression of a-synuclein (SNCA) isoforms with different 3' untranslated regions (3'UTRs). Yet, the post-transcriptional mechanisms regulating SNCA expression are unknown. Using a large-scale in vitro/in silico screening we identified RNA-binding proteins (RBPs) that interact with SNCA 3' UTRs. We identified two RBPs, ELAVL1 and TIAR, that bind with high affinity to the most abundant and translationally active 3' UTR isoform (575 nt)...
November 15, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29149058/neurotrophic-and-neuroregenerative-effects-of-gh-igf1
#15
Vittorio Emanuele Bianchi, Vittorio Locatelli, Laura Rizzi
INTRODUCTION: Human neurodegenerative diseases increase progressively with age and present a high social and economic burden. Growth hormone (GH) and insulin-like growth factor-1 (IGF-1) are both growth factors exerting trophic effects on neuronal regeneration in the central nervous system (CNS) and peripheral nervous system (PNS). GH and IGF-1 stimulate protein synthesis in neurons, glia, oligodendrocytes, and Schwann cells, and favor neuronal survival, inhibiting apoptosis. This study aims to evaluate the effect of GH and IGF-1 on neurons, and their possible therapeutic clinical applications on neuron regeneration in human subjects...
November 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29148896/prooxidant-antioxidant-balance-advanced-oxidation-protein-products-and-lipid-peroxidation-in-serbian-patients-with-parkinson-s-disease
#16
Jadranka Miletić, Dunja Drakulić, Snežana Pejić, Marijana Petković, Tihomir V Ilić, Milica Miljković, Aleksandra Stefanović, Milica Prostran, Marina Stojanov
BACKGROUND: Biomarkers of oxidative stress are relevant in the evaluation of the disease status and prooxidant-antioxidant balance, advanced oxidation protein products and lipid peroxidation products (malondialdehyde and 4-hydroxynonenal) are being extensively evaluated regarding their relationship with clinical presentation and disease severity. The aim of study was to evaluate the levels of above mentioned parameters in plasma of 39 men and 17 women with Parkinson's disease, originated from the Republic of Serbia and their relation to clinicopathological characteristics (gender, age at examination, duration of the disease, and Hoehn and Yahr score) and oxidative status...
November 17, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29148136/effects-of-sensitive-electrical-stimulation-based-somatosensory-cueing-in-parkinson-s-disease-gait-and-freezing-of-gait-assessment
#17
Benoît Sijobert, Christine Azevedo, David Andreu, Claudia Verna, Christian Geny
This study aims to investigate the effect of a somatosensory cueing on gait disorders in subjects with Parkinson's disease (PD). After having performed stepping in place and timed up and go assessing tasks, 13 participants with PD were equipped with an electrical stimulator and an inertial measurement unit (IMU) located under the lateral malleolus on the sagittal plane. Electrodes were positioned under the arch of the foot and electrical stimulation (ES) parameters (five 500 µs/phase charge-balanced biphasic pulses delivered at 200 Hz, repeated four times at 10 Hz) adjusted to deliver a sensitive signal...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29148118/role-of-the-combination-of-fa-and-t2-parameters-as-a-new-diagnostic-method-in-therapeutic-evaluation-of-parkinson-s-disease
#18
Yuan Fang, Tao Zheng, Lanxiang Liu, Dawei Gao, Qinglei Shi, Yanchao Dong, Dan Du
BACKGROUND: Simple diffusion delivery (SDD) has attained good effects with only tiny amounts of drugs. Fractional anisotropy (FA) and relaxation time T2* that indicate the integrity of fiber tracts and iron concentration within brain tissue were used to evaluate the therapeutic effect of SDD. PURPOSE: To evaluate therapeutic effect of SDD in the Parkinson's disease (PD) rat model with FA and T2* parameters. STUDY TYPE: Prospective case-control animal study...
November 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29147911/dj-1-as-a-therapeutic-target-against-cancer
#19
Ji Cao, Xiaobing Chen, Meidan Ying, Qiaojun He, Bo Yang
DJ-1 is a gene involved in various cellular processes, including transcriptional regulation, oxidative stress response, fertilization, mitochondrial regulation, inflammatory and fibrogenic niche formation, and glycation damage prevention. Although a disease-associated genetic study within the past decade has demonstrated that the mutation of DJ-1 is associated with autosomal early-onset Parkinson's disease, increasing evidence suggests that DJ-1 also plays a critical role in tumor development and progression...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29147910/therapeutic-activities-of-dj-1-and-its-binding-compounds-against-neurodegenerative-diseases
#20
Masatoshi Inden, Daijiro Yanagisawa, Masanori Hijioka, Hiroyoshi Ariga, Yoshihisa Kitamura
Parkinson's disease (PD) is a progressive neurodegenerative disorder that is primarily characterized by the degeneration of dopaminergic neurons in the nigrostriatal pathway. Loss-of-function mutations in the gene encoding PARK7/DJ-1 were identified in familial PD. Wild-type DJ-1 acts as an oxidative stress sensor in neural cells. Previously, we identified binding compounds of DJ-1, including UCP0045037/compound A, UCP0054278/compound B, and compound-23 (comp-23), by in silico virtual screening. These compounds prevented oxidative stress-induced dopaminergic neuronal death and restored locomotion defects in animal models of PD...
2017: Advances in Experimental Medicine and Biology
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