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https://www.readbyqxmd.com/read/29786160/aberrant-learning-in-parkinson-s-disease-a-neurocomputational-study-on-bradykinesia
#1
Mauro Ursino, Chiara Baston
Parkinson's disease (PD) is a neurodegenerative disorder characterized by a progressive decline in motor functions, such as bradykinesia, caused by the pathological denervation of nigrostriatal dopaminergic neurons within the basal ganglia (BG). It is acknowledged that dopamine (DA) directly affects the modulatory role of BG towards the cortex. However, a growing body of literature is suggesting that DA induced aberrant synaptic plasticity could play a role in the core symptoms of PD, thus recalling for a "reconceptualization" of the pathophysiology...
May 22, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29785038/reduced-peak-stimulated-growth-hormone-is-associated-with-hyperuricemia-in-obese-children-and-adolescents
#2
Shuang Liang, Dejian Zhang, Jianhong Qi, Xiaobo Song, Jiang Xue
The purpose of the study is to investigate whether reduced peak GH response to arginine-levodopa test is associated with hyperuricemia in obese children and adolescents. The study population consisted of a total sample of 78 obese and 30 normal-weight children and adolescents without known hypopituitarism. All participants underwent clinical examination and GH stimulation testing. IGF-1, lipid profile and other metabolic markers were assessed. The obese subjects were then divided into two groups according to the serum levels of uric acid...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29778899/dopamine-loss-alters-the-hippocampus-nucleus-accumbens-synaptic-transmission-in-the-tg2576-mouse-model-of-alzheimer-s-disease
#3
Alberto Cordella, Paraskevi Krashia, Annalisa Nobili, Annabella Pignataro, Livia La Barbera, Maria Teresa Viscomi, Alessandro Valzania, Flavio Keller, Martine Ammassari-Teule, Nicola Biagio Mercuri, Nicola Berretta, Marcello D'Amelio
The functional loop involving the ventral tegmental area (VTA), dorsal hippocampus and nucleus accumbens (NAc) plays a pivotal role in the formation of spatial memory and persistent memory traces. In particular, the dopaminergic innervation from the VTA to the hippocampus is critical for hippocampal-related memory function and alterations in the midbrain dopaminergic system are frequently reported in Alzheimer's disease (AD), contributing to age-related decline in memory and non-cognitive functions. However, much less is known about the hippocampus-NAc connectivity in AD...
May 17, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29772299/biophenols-enzymes-%C3%AE-secretase-cholinesterases-histone-deacetylase-and-tyrosinase-inhibitors-from-olive-olea-europaea-l
#4
Syed Haris Omar, Christopher J Scott, Adam S Hamlin, Hassan K Obied
The focus of this study was on inhibition of enzymes involved in the pathogenesis Alzheimer's disease (AD) including prime amyloid beta (Aβ) producing enzyme (β-secretase: BACE-1) and disease progression enzymes including acetylcholinesterase (AChE), butyrylcholinesterase (BChE), histone deacetylase (HDAC), and tyrosinase along with the catecholamine L-DOPA, by using olive biophenols. Here we report the strongest inhibition of BACE-1 from rutin (IC50 : 3.8 nM) followed by verbascoside (IC50 : 6.3 nM) and olive fruit extract (IC50 : 18 ng), respectively...
May 14, 2018: Fitoterapia
https://www.readbyqxmd.com/read/29767379/individual-cognitive-change-after-dbs-surgery-in-parkinson-s-disease-patients-using-reliable-change-index-methodology
#5
Thomas Foki, Daniela Hitzl, Walter Pirker, Klaus Novak, Gisela Pusswald, Johann Lehrner
Long-term therapy of Parkinson's disease (PD) with levodopa (L-DOPA) is associated with a high risk of developing motor fluctuations and dyskinesia. Deep brain stimulation (DBS) in PD patients of the subthalamic nucleus can improve these motor complications. Although the positive effect on motor symptoms has been proven, postoperative cognitive decline has been documented. To tackle the impact of PD-DBS on cognition, 18 DBS patients were compared to 25 best medically treated Parkinson's patients, 24 Mild Cognitive Impairment (MCI) patients and 12 healthy controls using the Neuropsychological Test Battery Vienna-long (NTBV-long) for cognitive outcome 12 months after first examination...
May 16, 2018: Neuropsychiatrie: Klinik, Diagnostik, Therapie und Rehabilitation
https://www.readbyqxmd.com/read/29765181/assessment-of-leg-muscle-activity-using-toe-tapping-in-patients-with-parkinson-s-disease-comparison-of-two-types-of-toe-tapping
#6
Seira Taniguchi, Ferdinand Peper, Tetsuya Shimokawa
[Purpose] This study investigates two types of toe tapping, i.e., "closed," with both feet on the floor, and "open," in which the foot does not touch the ground, and evaluates their usefulness in combination with monitoring of muscle activity during toe tapping. [Subjects and Methods] The study enrolled 11 patients with Parkinson's disease (PD) and 9 controls (Controls). The tibialis anterior (TA) and gastrocnemius (GS) muscle activity during toe tapping was measured using surface electromyography...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29760163/%C3%A2-safinamide-for-parkinson-s-disease
#7
(no author information available yet)
▼ Safinamide (Xadago - Zambon S.p.A) is a monoamine-oxidase B (MAO-B) inhibitor licensed as add-on therapy for people with idiopathic Parkinson's disease who are experiencing motor fluctuations with levodopa.1 Currently there is no cure for Parkinson's disease and drugs are used to reduce motor symptoms and improve daily activities.2,3 Here, we review the evidence for this MAO-B inhibitor.
May 2018: Drug and Therapeutics Bulletin
https://www.readbyqxmd.com/read/29759928/bdnf-variant-is-associated-with-milder-motor-symptom-severity-in-early-stage-parkinson-s-disease
#8
D Luke Fischer, Peggy Auinger, John L Goudreau, Katrina L Paumier, Allyson Cole-Strauss, Christopher J Kemp, Jack W Lipton, Caryl E Sortwell
INTRODUCTION: Parkinson's disease (PD) progression is heterogeneous. Variants in PD-related genes may alter disease progression or severity. We examined if the single nucleotide variant rs6265 in the gene Bdnf alters clinical phenotype in early-stage, unmedicated PD. METHODS: A retrospective analysis was conducted using data collected in the Deprenyl And Tocopherol Antioxidative Therapy Of Parkinsonism (DATATOP) study. DNA samples (n = 217) were genotyped for the Bdnf rs6265 variant, and the primary endpoint was time to initiate levodopa...
May 9, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29756335/treatment-of-restless-legs-syndrome-evidence-based-review-and-implications-for-clinical-practice-revised-2017-%C3%A2
#9
REVIEW
Juliane Winkelmann, Richard P Allen, Birgit Högl, Yuichi Inoue, Wolfgang Oertel, Aaro V Salminen, John W Winkelman, Claudia Trenkwalder, Cristina Sampaio
The objective of the current review was to update the previous evidence-based medicine review of treatments for restless legs syndrome published in 2008. All randomized, controlled trials (level I) with a high quality score published between January 2007 and January 2017 were reviewed. Forty new studies qualified for efficacy review. Pregabalin, gabapentin enacarbil, and oxycodone/naloxone, which did not appear in the previous review, have accrued data to be considered efficacious. Likewise, new data enable the modification of the level of efficacy for rotigotine from likely efficacious to efficacious...
May 14, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29756234/inhaling-xenon-ameliorates-l-dopa-induced-dyskinesia-in-experimental-parkinsonism
#10
Jérôme Baufreton, Tomislav Milekovic, Qin Li, Steve McGuire, Eduardo Martin Moraud, Grégory Porras, Shiqi Sun, Wai Kin D Ko, Marine Chazalon, Stéphanie Morin, Elisabeth Normand, Géraldine Farjot, Aude Milet, Jan Pype, Elsa Pioli, Gregoire Courtine, Baptiste Bessière, Erwan Bezard
Parkinson's disease motor symptoms are treated with levodopa, but long-term treatment leads to disabling dyskinesia. Altered synaptic transmission and maladaptive plasticity of corticostriatal glutamatergic projections play a critical role in the pathophysiology of dyskinesia. Because the noble gas xenon inhibits excitatory glutamatergic signaling, primarily through allosteric antagonism of the N-methyl-d-aspartate receptors, we aimed to test its putative antidyskinetic capabilities. We first studied the direct effect of xenon gas exposure on corticostriatal plasticity in a murine model of levodopa-induced dyskinesia We then studied the impact of xenon inhalation on behavioral dyskinetic manifestations in the gold-standard rat and primate models of PD and levodopa-induced dyskinesia...
May 14, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29756003/onset-and-remission-of-psychosis-in-parkinson-s-disease-pharmacologic-and-motoric-markers
#11
Jared Thomas Hinkle, Kate Perepezko, Catherine C Bakker, Martinus P G Broen, Kathleen Chin, Ted M Dawson, Vanessa Johnson, Zoltan Mari, Cherie L Marvel, Kelly A Mills, Alexander Pantelyat, Olga Pletnikova, Liana S Rosenthal, Melissa D Shepard, Daniel A Stevens, Juan C Troncoso, Jiangxia Wang, Gregory M Pontone
Background: Psychosis is among the most disabling complications of Parkinson's disease (PD). The chronicity of PD psychosis remains understudied and the relative importance of dopaminergic therapy versus the disease process itself in engendering psychosis remains unclear. Objectives: To examine pharmacologic and motoric correlates of PD psychosis onset and remission in a longitudinally monitored PD cohort. Methods: We analyzed data from 165 participants enrolled in a longitudinal PD study through the Morris K...
January 2018: Movement Disorders Clinical Practice
https://www.readbyqxmd.com/read/29752303/typical-features-of-parkinson-disease-and-diagnostic-challenges-with-microdeletion-22q11-2
#12
Erik Boot, Nancy J Butcher, Sean Udow, Connie Marras, Kin Y Mok, Satoshi Kaneko, Matthew J Barrett, Paolo Prontera, Brian D Berman, Mario Masellis, Boris Dufournet, Karine Nguyen, Perrine Charles, Eugénie Mutez, Teodor Danaila, Aurélia Jacquette, Olivier Colin, Sophie Drapier, Michel Borg, Ania M Fiksinski, Elfi Vergaelen, Ann Swillen, Annick Vogels, Annika Plate, Claudia Perandones, Thomas Gasser, Kristien Clerinx, Frédéric Bourdain, Kelly Mills, Nigel M Williams, Nicholas W Wood, Jan Booij, Anthony E Lang, Anne S Bassett
OBJECTIVE: To delineate the natural history, diagnosis, and treatment response of Parkinson disease (PD) in individuals with 22q11.2 deletion syndrome (22q11.2DS), and to determine if these patients differ from those with idiopathic PD. METHODS: In this international observational study, we characterized the clinical and neuroimaging features of 45 individuals with 22q11.2DS and PD (mean follow-up 7.5 ± 4.1 years). RESULTS: 22q11.2DS PD had a typical male excess (32 male, 71...
May 11, 2018: Neurology
https://www.readbyqxmd.com/read/29748112/automated-assessment-of-levodopa-induced-dyskinesia-evaluating-the-responsiveness-of-video-based-features
#13
Michael H Li, Tiago A Mestre, Susan H Fox, Babak Taati
INTRODUCTION: Technological solutions for quantifying Parkinson's disease (PD) symptoms may provide an objective means to track response to treatment, including side effects such as levodopa-induced dyskinesia. Vision-based systems are advantageous as they do not require physical contact with the body and have minimal instrumentation compared to wearables. We have developed a vision-based system to quantify a change in dyskinesia as reported by patients using 2D videos of clinical assessments during acute levodopa infusions...
May 5, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29748109/efficacy-and-safety-of-adjunctive-rasagiline-in-japanese-parkinson-s-disease-patients-with-wearing-off-phenomena-a-phase-2-3-randomized-double-blind-placebo-controlled-multicenter-study
#14
Nobutaka Hattori, Atsushi Takeda, Shinichi Takeda, Akira Nishimura, Masafumi Kato, Hideki Mochizuki, Masahiro Nagai, Ryosuke Takahashi
INTRODUCTION: Rasagiline, a selective, irreversible monoamine oxidase-B inhibitor, is in development in Japan as adjunctive therapy to levodopa. This Phase 2/3 trial evaluated the efficacy and safety of adjunctive rasagiline in Japanese patients with Parkinson's disease (PD) and wearing-off phenomena. METHODS: Patients aged 30-79 years with diagnosed PD and stable levodopa use were randomized 1:1:1 to rasagiline (0.5/1 mg/day) or placebo for 26 weeks. The primary endpoint was change from baseline in mean daily OFF-time during the treatment period...
April 27, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29747716/effects-of-antiparkinson-medication-on-cognition-in-parkinson-s-disease-a-systematic-review
#15
Marc-André Roy, Maxime Doiron, Jessica Talon-Croteau, Nicolas Dupré, Martine Simard
OBJECTIVE: This study aimed to systematically review the effects of currently prescribed antiparkinson medication on cognition in patients with mild-to-moderate Parkinson's disease (PD) who were either cognitively intact or mildly impaired. METHODS: English- and French-language studies published between 1969 and 2017 were accessed via MedLine, PsychNET, EMBASE and EBSCO databases. Methodological quality (MQ) was evaluated with the quality assessment instrument of the Cochrane Collaboration Depression, Anxiety and Neurosis Review (scores from 0% to 44% indicate very low quality; scores from 45% to 64% indicate low quality; scores from 65% to 84% indicate medium quality; and scores from 85% to 100% indicate high quality)...
May 11, 2018: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/29739324/zinc-and-linoleic-acid-pre-treatment-attenuates-biochemical-and-histological-changes-in-the-midbrain-of-rats-with-rotenone-induced-parkinsonism
#16
Ngala Elvis Mbiydzenyuy, Herbert Izo Ninsiima, Miriela Betancourt Valladares, Constant Anatole Pieme
BACKGROUND: Studies have suggested the supplementation of Zinc and Linoleic acid in the management of neurodegenerative disorders but none has investigated the combined effects. Little is known about the neuroprotective effects of either Zinc or Linoleic acid or their combination against development of Parkinsonism. This study was designed to investigate the neuroprotective effects of Zinc and Linoleic acid in rotenone-induced Parkinsonism in rats. METHODS: Thirty-six young adult female rats weighing 100-150 g divided into six groups were used...
May 9, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29725172/clinical-profile-of-parkinson-s-disease-experience-of-niger
#17
Hamid Assadeck, Moussa Toudou Daouda, Fatimata Hassane Djibo, Djibo Douma Maiga, Eric Adehossi Omar
Background: Parkinson's disease (PD) is a chronic neurodegenerative pathology with unknown etiology. It is characterized clinically by the classic triad that associated tremors, bradykinesia, and rigidity. In Niger, there are no data on PD. Aims: We aimed to provide the demographic and clinical profile of PD in patients from Niger to create a database on PD in Niger. Patients and Methods: We conducted a retrospective study at the Neurology Outpatient Clinic of the Hôpital National de Niamey (HNN, Niger) over a period of 4...
April 2018: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/29724466/voice-quality-and-orofacial-strength-as-outcome-of-levodopa-effectiveness-in-patients-with-early-idiopathic-parkinson-disease-a-preliminary-report
#18
Jérôme R Lechien, Serge Blecic, Yves Ghosez, Kathy Huet, Bernard Harmegnies, Sven Saussez
INTRODUCTION: Sixty to 90% of patients with idiopathic Parkinson disease (IPD) developed early dysphonia and subtle speech impairment, which is usually related to orofacial muscular dysfunctions. The aim of this preliminary study is to assess the usefulness of voice quality and orofacial strength (involved in speech) as outcome of levodopa challenge test used for the IPD diagnosis. MATERIAL AND METHODS: A total of 20 patients with early IPD were recruited and evaluated for clinical findings (Hoehn and Yahr scale), voice handicap index, maximal phonation time, phonation quotient, percent jitter, percent shimmer, noise-to-harmonic ratio, and orofacial muscular strength (Iowa Oral Performance Instrument) at baseline, throughout the levodopa challenge test and after therapeutic stabilization...
April 30, 2018: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29722458/levodopa-induced-dyskinesia-trap-ping-the-culprit
#19
Shweta Prasad, Pramod Kumar Pal
No abstract text is available yet for this article.
May 3, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29713179/levodopa-carbidopa-entacapone-versus-levodopa-dopa-decarboxyiase-inhibitor-for-the-treatment-of-parkinson-s-disease-systematic-review-meta-analysis-and-economic-evaluation
#20
Zhan-Miao Yi, Ting-Ting Qiu, Yuan Zhang, Na Liu, Suo-Di Zhai
Aims: To review the evidence for efficacy, safety, and cost-effectiveness of levodopa/carbidopa/entacapone (LCE) compared with levodopa/dopa-decarboxyiase inhibitor (DDCI) for Parkinson's disease (PD). Methods: PubMed, Embase, the Cochrane Library, and Chinese databases WangFang Data, Chinese Sci-tech Journals Database and China National Knowledge Infrastructure, as well as ClinicalTrials.gov, were searched for randomized controlled trials with "levodopa/carbidopa/entacapone" as keywords...
2018: Therapeutics and Clinical Risk Management
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