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Parkinsons disease

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https://www.readbyqxmd.com/read/29778064/is-the-limit-cycle-attractor-an-almost-invariable-characteristic-in-human-walking
#1
Kim-Charline Broscheid, Christian Dettmers, Manfred Vieten
BACKGROUND: Common methods of gait analyses measure step length/width, gait velocity and gait variability to name just a few. Those parameters tend to be changing with fitness and skill of the subjects. But, do stable subject characteristic parameters in walking exist? Does the Limit-Cycle-Attractor qualify as such a parameter?. RESEARCH QUESTION: The attractor method is a new approach focusing on the dynamics of human motion. It classifies the fundamental walking pattern by calculating the Limit-Cycle-Attractor and its variability from acceleration data of the feet...
May 16, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29777676/cognitive-effects-of-rhythmic-auditory-stimulation-in-parkinson-s-disease-a-p300-study
#2
Juan Lei, Nadine Conradi, Cornelius Abel, Stefan Frisch, Alla Brodski-Guerniero, Marcel Hildner, Christian A Kell, Jochen Kaiser, Maren Schmidt-Kassow
Rhythmic auditory stimulation (RAS) may compensate dysfunctions of the basal ganglia (BG), involved with intrinsic evaluation of temporal intervals and action initiation or continuation. In the cognitive domain, RAS containing periodically presented tones facilitates young healthy participants' attention allocation to anticipated time points, indicated by better performance and larger P300 amplitudes to periodic compared to random stimuli. Additionally, active auditory-motor synchronization (AMS) leads to a more precise temporal encoding of stimuli via embodied timing encoding than stimulus presentation adapted to the participants' actual movements...
May 16, 2018: Brain Research
https://www.readbyqxmd.com/read/29777584/neuropsychiatric-expression-and-catatonia-in-22q11-2-deletion-syndrome-an-overview-and-case-series
#3
Nancy J Butcher, Erik Boot, Anthony E Lang, Danielle Andrade, Jacob Vorstman, Donna McDonald-McGinn, Anne S Bassett
Individuals with 22q11.2 deletion syndrome (22q11.2DS) are at elevated risk of developing treatable psychiatric and neurological disorders, including anxiety disorders, schizophrenia, seizures, and movement disorders, often beginning in adolescence or early to mid-adulthood. Here, we provide an overview of neuropsychiatric features associated with 22q11.2DS in adulthood. Results of a new case series of 13 individuals with 22q11.2DS and catatonic features together with 5 previously reported cases support a potential association of this serious psychomotor phenotype with the 22q11...
May 19, 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29777529/pharmacokinetics-of-ads-5102-amantadine-extended-release-capsules-administered-once-daily-at-bedtime-for-the-treatment-of-dyskinesia
#4
Robert A Hauser, Rajesh Pahwa, William A Wargin, Cindy J Souza-Prien, Natalie McClure, Reed Johnson, Jack T Nguyen, Rajiv Patni, Gregory T Went
BACKGROUND: Preclinical and clinical studies suggest amantadine immediate-release (IR) may reduce dyskinesia in Parkinson's disease (PD), although higher doses are associated with increased CNS adverse events (AEs). ADS-5102 is an extended release amantadine capsule formulation, designed for once-daily dosing at bedtime (qhs) to provide high concentrations upon waking and throughout the day, with lower concentrations in the evening. The pharmacokinetics (PK) of ADS-5102 were assessed in two phase I studies in healthy subjects, and a blinded, randomized phase II/III dose-finding study in PD patients...
May 18, 2018: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/29777524/mercury-involvement-in-neuronal-damage-and-in-neurodegenerative-diseases
#5
REVIEW
Veronica Lanza Cariccio, Annalisa Samà, Placido Bramanti, Emanuela Mazzon
Neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and multiple sclerosis are characterized by a chronic and selective process of neuronal cell death. Although the causes of neurodegenerative diseases remain still unknown, it is now a well-established idea that more factors, such as genetic, endogenous, and environmental, are involved. Among environmental causes, the accumulation of mercury, a heavy metal considered a toxic agent, was largely studied as a probable factor involved in neurodegenerative disease course...
May 18, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29777037/inhibition-of-tbc1d5-activates-rab7a-and-can-enhance-the-function-of-the-retromer-cargo-selective-complex
#6
Matthew N J Seaman, Aamir S Mukadam, Sophia Y Breusegem
The retromer complex is a vital component of the endosomal protein sorting machinery being necessary for sorting into both the endosome-to-Golgi retrieval pathway and also the endosome-to-cell-surface recycling pathway. Retromer mediates cargo selection through a trimeric complex comprising VPS35, VPS29 and VPS26 which is recruited to endosomes by binding to Rab7a and Snx3. Retromer function is linked to two distinct neurodegenerative diseases, Parkinson's disease and Alzheimer's disease and modulating retromer function has been proposed as an avenue to explore for a putative therapy in these conditions...
May 18, 2018: Journal of Cell Science
https://www.readbyqxmd.com/read/29776865/gut-microbiota-in-patients-with-parkinson-s-disease-in-southern-china
#7
Aiqun Lin, Wenxia Zheng, Yan He, Wenli Tang, Xiaobo Wei, Rongni He, Wei Huang, Yuying Su, Yaowei Huang, Hongwei Zhou, Huifang Xie
INTRODUCTION: Accumulating evidence has revealed alterations in the communication between the gut and brain in patients with Parkinson's disease (PD), and previous studies have confirmed that alterations in the gut microbiome play an important role in the pathogenesis of numerous diseases, including PD. The aim of this study was to determine whether the faecal microbiome of PD patients in southern China differs from that of control subjects and whether the gut microbiome composition alters among different PD motor phenotypes...
May 16, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29776864/putaminal-dopamine-depletion-in-de-novo-parkinson-s-disease-predicts-future-development-of-wearing-off
#8
Su Jin Chung, Yoonju Lee, Jungsu S Oh, Jae Seung Kim, Phil Hyu Lee, Young H Sohn
INTRODUCTION: The present study aimed to investigate whether the level of presynaptic dopamine neuronal loss predicts future development of wearing-off in de novo Parkinson's disease. METHODS: This retrospective cohort study included a total of 342 non-demented patients with de novo Parkinson's disease who underwent dopamine transporter positron emission tomography scans at their initial evaluation and received dopaminergic medications for 24 months or longer. Onset of wearing-off was determined based on patients' medical records at their outpatient clinic visits every 3-6 months...
May 10, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29776682/the-impact-of-apolipoprotein-e-alleles-on-cognitive-performance-in-patients-with-parkinson-s-disease
#9
Anna Pierzchlińska, Monika Białecka, Mateusz Kurzawski, Jarosław Sławek
Apolipoprotein E (ApoE) is a vital component of several lipoproteins and plays a major role in lipid metabolism. APOE gene comprises of three alleles determined by two single nucleotide polymorphisms (rs429358 and rs7412) resulting in the protein isoforms, among which ApoE4 is a confirmed risk factor for Alzheimer's Disease. However, the impact of APOE genotypes on Parkinson's Disease Dementia (PDD) is still inconclusive. The PDD diagnostic criteria are very inconsistent, and could be complemented with genetic factors...
May 5, 2018: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29775624/characterization-and-comparative-analysis-of-a-new-mouse-microglial-cell-model-for-studying-neuroinflammatory-mechanisms-during-neurotoxic-insults
#10
Souvarish Sarkar, Emir Malovic, Deeksha Sarda, Vivek Lawana, Dharmin Rokad, Huajun Jin, Vellareddy Anantharam, Arthi Kanthasamy, Anumantha G Kanthasamy
Microglia are the first responders of the central nervous system, acting as the key modulators of neuroinflammation observed during neurotoxic insults as well as in the pathophysiology of several neurodegenerative disorders including Alzheimer's (AD), Parkinson's (PD), and Huntington's diseases (HD). The number of publications on microglia has increased steadily throughout the past decade because of immense interests in the neuroinflammation that precedes the neurodegenerative process. To study microglial biology and its role in modulating neuroinflammation, immortalized microglial cell lines derived from mice, rats, and humans have been developed...
May 15, 2018: Neurotoxicology
https://www.readbyqxmd.com/read/29775152/semi-automated-application-for-estimating-subthalamic-nucleus-boundaries-and-optimal-target-selection-for-deep-brain-stimulation-implantation-surgery
#11
John A Thompson, Salam Oukal, Hagai Bergman, Steven Ojemann, Adam O Hebb, Sara Hanrahan, Zvi Israel, Aviva Abosch
OBJECTIVE Deep brain stimulation (DBS) of the subthalamic nucleus (STN) has become standard care for the surgical treatment of Parkinson's disease (PD). Reliable interpretation of microelectrode recording (MER) data, used to guide DBS implantation surgery, requires expert electrophysiological evaluation. Recent efforts have endeavored to use electrophysiological signals for automatic detection of relevant brain structures and optimal implant target location. The authors conducted an observational case-control study to evaluate a software package implemented on an electrophysiological recording system to provide online objective estimates for entry into and exit from the STN...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29774960/alteration-of-nociceptive-integration-in-the-spinal-cord-of-a-rat-model-of-parkinson-s-disease
#12
Keri-Ann Charles, Frédéric Naudet, Rabia Bouali-Benazzouz, Marc Landry, Philippe De Deurwaerdère, Pascal Fossat, Abdelhamid Benazzouz
BACKGROUND: Pain is a major non motor symptom that contributes to impaired quality of life in PD. However, its mechanism is unknown. OBJECTIVES AND METHODS: We sought to identify the pain phenotypes and parallel changes in spinal integration of peripheral stimuli in a rat model of PD induced by lesions of SN dopamine neurons, using behavioral plantar and von Frey tests as well as electrophysiology of the dorsal horn. RESULTS: We show that dopamine depletion by 6-OHDA induced hypersensitivity to mechanical and thermal stimuli...
May 18, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29774765/-staying-safe-a-narrative-review-of-falls-prevention-in-people-with-parkinson-s-pdsafe
#13
Sophia Hulbert, Lynn Rochester, Alice Nieuwboer, Vicki Goodwin, Carolyn Fitton, Kim Chivers-Seymour, Ann Ashburn
BACKGROUND: Parkinson's disease demonstrates a spectrum of motor and non-motor symptoms. Falling is common and disabling. Current medical management shows minimal impact to reduce falls or fall-related risk factors, such as deficits in gait, strength, and postural instability. Despite evidence supporting rehabilitation in reducing fall risk factors, the most appropriate intervention to reduce overall fall rate remains inconclusive. This article aims to 1) synthesise current evidence and conceptual models of falls rehabilitation in Parkinson's in a narrative review; and based on this evidence, 2) introduce the treatment protocol used in the falls prevention and multi-centre clinical trial "PDSAFE"...
May 18, 2018: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29774458/effects-of-rs591323-on-serotonin-transporter-availability-in-healthy-male-subjects
#14
Kyoungjune Pak, Hyun-Yeol Nam, Seunghyeon Shin, Keunyoung Kim, Myung Jun Lee, Eun-Joo Kim, Jae Meen Lee, Seong-Jang Kim, In Joo Kim
OBJECTIVES: We aimed to investigate the association between genetic factors of SNPs dopamine transporter (DAT) and serotonin transporter (SERT) availabilities in healthy controls. METHODS: The study population consisted of healthy controls with screening 123 I-FP-CIT single-photon emission computed tomography. Specific binding of 123 I-FP-CIT regarding DAT and SERT was calculated using a region of interest analysis. VOI template was applied to measure specific binding ratios (SBRs) of caudate nucleus, putamen, striatum, midbrain, and pons...
May 17, 2018: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/29773975/cold-shock-induced-protein-rbm3-but-not-mild-hypothermia-protects-human-sh-sy5y-neuroblastoma-cells-from-mpp-induced-neurotoxicity
#15
Hai-Jie Yang, Xiang Shi, Fei Ju, Bei-Ning Hao, Shuang-Ping Ma, Lei Wang, Bin-Feng Cheng, Mian Wang
The cold shock protein RBM3 can mediate mild hypothermia-related protection in neurodegeneration such as Alzheimer's disease. However, it remains unclear whether RBM3 and mild hypothermia provide same protection in model of Parkinson's disease (PD), the second most common neurodegenerative disorder. In this study, human SH-SY5Y neuroblastoma cells subjected to insult by 1-methyl-4-phenylpyridinium (MPP+ ) served as an in-vitro model of PD. Mild hypothermia (32°C) aggravated MPP+ -induced apoptosis, which was boosted when RBM3 was silenced by siRNA...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29773814/melanopsin-mediated-pupil-function-is-impaired-in-parkinson-s-disease
#16
Daniel S Joyce, Beatrix Feigl, Graham Kerr, Luisa Roeder, Andrew J Zele
Parkinson's disease (PD) is characterised by non-motor symptoms including sleep and circadian disruption. Melanopsin-expressing intrinsically photosensitive Retinal Ganglion Cells (ipRGC) transmit light signals to brain areas controlling circadian rhythms and the pupil light reflex. To determine if non-motor symptoms observed in PD are linked to ipRGC dysfunction, we evaluated melanopsin and rod/cone contributions to the pupil response in medicated participants with PD (n = 17) and controls (n = 12)...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773512/increased-foot-strike-variability-in-parkinson-s-disease-patients-with-freezing-of-gait
#17
Jesal Shah, Lakshmi Pillai, David K Williams, Shannon M Doerhoff, Linda Larson-Prior, Edgar Garcia-Rill, Tuhin Virmani
INTRODUCTION: Freezing of gait (FOG) is a debilitating, late motor complication of Parkinson's disease (PD) that occurs in 50-80% of patients. Gait freezing significantly worsens quality of life by decreasing mobility and increasing falls. Studies have shown that patients with episodic freezing episodes also have deficits in continuous gait. We evaluated whether there was an objective gait correlate to the increased stumbling reported by many patients with gait freezing. METHODS: PD subjects and healthy controls (HC) were enrolled after IRB approval...
May 1, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29772521/myricetin-attenuates-neurodegeneration-and-cognitive-impairment-in-parkinsonism
#18
Vijayraja Dhanraj, Jeyaprakash Karuppaiah, Rengasamy Balakrishnan, Namasivayam Elangovan
Parkinson's disease (PD) is a progressive neurodegenerative disease due to dopaminergic neuron degeneration. It mostly affects the aged population, leads to memory decline and loss of motor coordination. The present study investigates the neuroprotective role of myricetin a flavonol isolated from the brown seaweed Turbinaria ornata in rotenone induced Drosophila model of PD. Rotenone administration led to dopaminergic neuronal degeneration, dopamine depletion, impaired muscular coordination, gait disturbances, memory decline oxidative stress and apoptosis...
June 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/29772496/vibrotactile-feedback-alters-dynamics-of-static-postural-control-in-persons-with-parkinson-s-disease-but-not-older-adults-at-high-fall-risk
#19
Carleigh M High, Hannah F McHugh, Stephen C Mills, Shinichi Amano, Jane E Freund, Srikant Vallabhajosula
BACKGROUND: Aging and Parkinson's disease are often associated with impaired postural control. Providing extrinsic feedback via vibrotactile sensation could supplement intrinsic feedback to maintain postural control. RESEARCH QUESTION: We investigated the postural control response to vibrotactile feedback provided at the trunk during challenging stance conditions in older adults at high fall risk and individuals with Parkinson's disease compared to healthy older adults...
May 8, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29772432/silymarin-prevents-apoptosis-through-inhibiting-the-bax-caspase-3-expression-and-suppresses-toll-like-receptor-4-pathway-in-the-snc-of-6-ohda-intoxicated-rats
#20
Rasool Haddadi, Alireza Mohajjel Nayebi, Shahla Eyvari Brooshghalan
BACKGROUND AND PURPOSE: Several lines of evidence show that apoptosis, oxidative stress and neuroinflammation are associated with the development of Parkinson's disease (PD). In the present study, we investigated the effect of pre-treatment with silymarin (SM) on oxidative stress, apoptosis and toll-like receptor 4 (TLR4) expression in substantia nigra pars copmacta (SNc) of 6-hydroxydopamine (6-OHDA)-lesioned rats. METHODS: Animals were pretreated with 100, 200 or 300 mg/kg of SM daily for 5 days and at 6th day 6-OHDA (8 μg/2 μl) was infused unilaterally into the central region of the SNc...
May 14, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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