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https://www.readbyqxmd.com/read/28222562/impaired-scaling-of-preparatory-postural-responses-to-repeated-balance-perturbations-in-parkinsonian-patients-with-comorbid-white-matter-disease
#1
David Cioncoloni, Lodovica Martelli, Deborah Rosignoli, Riccardo Mazzocchio
BACKGROUND: Postural instability may result from altered sequencing of automatic motor programs for anticipatory postural corrections and/or impaired motor learning in Parkinson Disease (PD) patients. Comorbid white matter disease is a major determinant of axial motor impairment, leading to poorer stability than nigrostriatal dopaminergic denervation per se. OBJECTIVE: To assess differences in anticipatory control of postural stability function between subjects affected by PD with comorbid leukoaraiosis (LPD), idiopathic Parkinson disease (IPD) and elderly health subjects (EHS) as control group...
February 10, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28222548/does-positive-pressure-body-weight-support-alter-spatiotemporal-gait-parameters-in-healthy-and-parkinsonian-individuals
#2
Joshua J Lander, Matthew F Moran
BACKGROUND: Evidence suggests treadmill training (TT) and body-weight supported treadmill training (BWSTT) are effective strategies to improve gait in Parkinson's disease (PD) patients. However, few researchers have investigated the spatiotemporal parameters during TT or BWSTT. OBJECTIVE: The goal of this study is to determine gait adaptations in PD and healthy subjects during positive pressure BWSTT and post-intervention overground walking. METHODS: Ten PD and ten healthy individuals participated in this study...
February 6, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28222540/top-altmetric-scores-in-the-parkinson-s-disease-literature
#3
Rui Araújo, Aaron A Sorensen, Stacy Konkiel, Bastiaan R Bloem
A new class of social web-based metrics for scholarly publications (altmetrics) has surfaced as a complement to traditional citation-based metrics. Our aim was to study and characterize those recent papers in the field of Parkinson's disease which had received the highest Altmetric Attention Scores and to compare this attention measure to the traditional metrics. The top 20 papers in our analysis covered a variety of topics, mainly new disease mechanisms, treatment options and risk factors for the development of PD...
2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28222539/technologies-assessing-limb-bradykinesia-in-parkinson-s-disease
#4
Hasan Hasan, Dilan S Athauda, Thomas Foltynie, Alastair J Noyce
BACKGROUND: The MDS-UPDRS (Movement Disorders Society - Unified Parkinson's Disease Rating Scale) is the most widely used scale for rating impairment in PD. Subscores measuring bradykinesia have low reliability that can be subject to rater variability. Novel technological tools can be used to overcome such issues. OBJECTIVE: To systematically explore and describe the available technologies for measuring limb bradykinesia in PD that were published between 2006 and 2016...
2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28222538/vps35-the-retromer-complex-and-parkinson-s-disease
#5
Erin T Williams, Xi Chen, Darren J Moore
Mutations in the vacuolar protein sorting 35 ortholog (VPS35) gene encoding a core component of the retromer complex, have recently emerged as a new cause of late-onset, autosomal dominant familial Parkinson's disease (PD). A single missense mutation, AspD620Asn (D620N), has so far been unambiguously identified to cause PD in multiple individuals and families worldwide. The exact molecular mechanism(s) by which VPS35 mutations induce progressive neurodegeneration in PD are not yet known. Understanding these mechanisms, as well as the perturbed cellular pathways downstream of mutant VPS35, is important for the development of appropriate therapeutic strategies...
February 8, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28222537/timing-and-kinetics-of-nonmotor-fluctuations-in-advanced-parkinson-s-disease
#6
Christiana Ossig, Daniel Sippel, Mareike Fauser, Florin Gandor, Wolfgang H Jost, Georg Ebersbach, Alexander Storch
BACKGROUND: Nonmotor symptoms (NMS) are known to fluctuate together with motor oscillations in advanced PD, but their timing and kinetics remains enigmatic. OBJECTIVE: To evaluate timing and kinetics of NMS fluctuations. METHODS: Analysis of diary data from 17 fluctuating PD patients. Diaries were completed by rating NMS as absent (defined herein as NMS On state) or present (NMS Off state) and motor function for every hour for 5 consecutive days...
February 8, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28222536/predictors-of-recurrent-falls-in-people-with%C3%A2-parkinson-s-disease-and-proposal-for%C3%A2-a%C3%A2-predictive-tool
#7
Lorena R S Almeida, Guilherme T Valenca, Nádja N Negreiros, Elen B Pinto, Jamary Oliveira-Filho
BACKGROUND: Falls are a debilitating problem for people with Parkinson's disease (PD). OBJECTIVES: To compare clinical and functional characteristics of non-fallers, single and recurrent fallers (≥2 falls); to determine predictors of time to second fall; and to develop a predictive tool for identifying people with PD at different categories of falls risk. METHODS: Participants (n = 229) were assessed by disease-specific, self-report and balance measures and followed up for 12 months...
February 8, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28222515/meta-analysis-of-parkinson-s-disease-and-alzheimer-s-disease-revealed-commonly-impaired-pathways-and-dysregulation-of-nrf2-dependent-genes
#8
Qian Wang, Wen-Xing Li, Shao-Xing Dai, Yi-Cheng Guo, Fei-Fei Han, Jun-Juan Zheng, Gong-Hua Li, Jing-Fei Huang
Many lines of evidence suggest that Parkinson's disease (PD) and Alzheimer's disease (AD) have common characteristics, such as mitochondrial dysfunction and oxidative stress. As the underlying molecular mechanisms are unclear, we perform a meta-analysis with 9 microarray datasets of PD studies and 7 of AD studies to explore it. Functional enrichment analysis revealed that PD and AD both showed dysfunction in the synaptic vesicle cycle, GABAergic synapses, phagosomes, oxidative phosphorylation, and TCA cycle pathways, and AD had more enriched genes...
February 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28222355/neuroimaging-of-major-depression-in-parkinson-s-disease-cortical-thickness-cortical-and-subcortical-volume-and-spectroscopy-findings
#9
Marcos Hortes N Chagas, Vitor Tumas, Márcio A Pena-Pereira, João Paulo Machado-de-Sousa, Antonio Carlos Dos Santos, Rafael Faria Sanches, Jaime E C Hallak, José Alexandre S Crippa
Depression is the most common psychiatric disorder in Parkinson's disease (PD). The aim of this study was to compare PD patients with current Major Depressive Disorder (MDD), lifetime MDD, and no MDD using three neuroimaging techniques. A total of 43 PD patients were selected and divided into three groups: (i) current MDD (n = 15), (ii) previous MDD without current MDD (n = 10); and (iii) control group (no current or lifetime MDD; n = 18). All participants underwent magnetic resonance imaging to evaluate cortical thickness, cortical and subcortical volume, and spectroscopy in the bilateral putamen and cingulate cortex...
February 13, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28222198/algorithmic-design-of-a-noise-resistant-and-efficient-closed-loop-deep-brain-stimulation-system-a-computational-approach
#10
Sofia D Karamintziou, Ana Luísa Custódio, Brigitte Piallat, Mircea Polosan, Stéphan Chabardès, Pantelis G Stathis, George A Tagaris, Damianos E Sakas, Georgia E Polychronaki, George L Tsirogiannis, Olivier David, Konstantina S Nikita
Advances in the field of closed-loop neuromodulation call for analysis and modeling approaches capable of confronting challenges related to the complex neuronal response to stimulation and the presence of strong internal and measurement noise in neural recordings. Here we elaborate on the algorithmic aspects of a noise-resistant closed-loop subthalamic nucleus deep brain stimulation system for advanced Parkinson's disease and treatment-refractory obsessive-compulsive disorder, ensuring remarkable performance in terms of both efficiency and selectivity of stimulation, as well as in terms of computational speed...
2017: PloS One
https://www.readbyqxmd.com/read/28221817/neuroprotective-effect-of-omega-3-polyunsaturated-fatty-acids-in-the-6-ohda-model-of-parkinson-s-disease-is-mediated-by-a-reduction-of-inducible-nitric-oxide-synthase
#11
Marco Aurélio Mori, Ana Marcia Delattre, Bruno Carabelli, Claudia Pudell, Mariza Bortolanza, Pedro Vinícius Staziaki, Jesuí Vergilio Visentainer, Paula Fernandes Montanher, Elaine A Del Bel, Anete Curte Ferraz
OBJECTIVE: Parkinson's disease (PD) is characterized by deterioration of the nigrostriatal system and associated with chronic neuroinflammation. Glial activation has been associated with regulating the survival of dopaminergic neurons and is thought to contribute to PD through the release of proinflammatory and neurotoxic factors, such as reactive nitric oxide (NO) that triggers or exacerbates neurodegeneration in PD. Polyunsaturated fatty acids (PUFAs) exert protective effects, including antiinflammatory, antiapoptotic, and antioxidant activity, and may be promising for delaying or preventing PD by attenuating neuroinflammation and preserving dopaminergic neurons...
February 21, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28221705/association-of-igf1-gene-polymorphism-with-parkinson-s-disease-in-a-han-chinese-population
#12
Yousheng Xiao, Luan Cen, Mingshu Mo, Xiang Chen, Shuxuan Huang, Lei Wei, Shaomin Li, Xinling Yang, Shaogang Qu, Zhong Pei, Pingyi Xu
BACKGROUND: Accumulating evidence suggests that insulin-like growth factor 1 (IGF1) plays an important role in Parkinson's disease (PD) pathogenesis. However, it is not clear if IGF1 polymorphism contributes to PD risk. METHODS: We performed a case-control study in a Han Chinese population that included 512 sporadic PD cases and 535 matched controls. All participants were genotyped for rs972936 using the Sequenom MassARRAY iPLEX platform. Serum IGF1 levels of 61 de novo, drug-naïve PD patients, and 55 age- and sex-matched controls were also measured by enzyme-linked immunosorbent assay (ELISA)...
February 21, 2017: Journal of Gene Medicine
https://www.readbyqxmd.com/read/28221082/partial-lesion-of-the-nigrostriatal-dopamine-pathway-in-rats-impairs-egocentric-learning-but-not-spatial-learning-or-behavioral-flexibility
#13
Katharine M Seip-Cammack, James J Young, Megan E Young, Matthew L Shapiro
Degeneration of the nigrostriatal dopaminergic system in Parkinson's disease (PD) causes motor dysfunction and cognitive impairment, but the etiology of the cognitive deficits remains unclear. The present study investigated the behavioral effects of partial lesions of the nigrostriatal dopamine (DA) pathway. Rats received bilateral infusions of either 6-hydroxydopamine (6-OHDA) or vehicle into the dorsolateral striatum and were tested in spatial and procedural learning tasks. Compared with intact rats, DA-depleted rats were impaired when the first task they learned required egocentric responses...
February 20, 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/28220836/nucleobindin-1-binds-to-multiple-types-of-pre-fibrillar-amyloid-and-inhibits-fibrillization
#14
Alessandra Bonito-Oliva, Shahar Barbash, Thomas P Sakmar, W Vallen Graham
During amyloid fibril formation, amyloidogenic polypeptides misfold and self assemble into soluble pre-fibrillar aggregates, i.e., protofibrils, which elongate and mature into insoluble fibrillar aggregates. An emerging class of chaperones, chaperone-like amyloid binding proteins (CLABPs), has been shown to interfere with aggregation of particular misfolded amyloid peptides or proteins. We have discovered that the calcium-binding protein nuclebindin-1 (NUCB1) is a novel CLABP. We show that NUCB1 inhibits aggregation of islet-amyloid polypeptide associated with type 2 diabetes mellitus, a-synuclein associated with Parkinson's disease, transthyretin V30M mutant associated with familial amyloid polyneuropathy, and Aβ42 associated with Alzheimer's disease by stabilizing their respective protofibril intermediates...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220718/the-big-imitator-strikes-again-a-case-report-of-neurosyphilis-in-a-patient-with-newly-diagnosed-hiv
#15
Sévérine de Bruijn, Chris Kenyon, Nicolas Léonard, Erika Vlieghe
BACKGROUND: Neurosyphilis is the result of an infection of the central nervous system caused by the spirochete Treponema pallidum. Its clinical presentation includes meningovascular syphilis, tabes dorsalis, and dementia paralytica, resulting in a wide range of symptoms such as psychosis, Parkinsonism, and depression. CASE REPORT: A 49-year-old male was admitted to a psychiatric hospital because of social withdrawal and self-neglect, indicative of a major depression...
February 21, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/28220655/ppars-in-the-central-nervous-system-roles-in-neurodegeneration-and-neuroinflammation
#16
Juan M Zolezzi, Manuel J Santos, Sussy Bastías-Candia, Claudio Pinto, Juan A Godoy, Nibaldo C Inestrosa
Over 25 years have passed since peroxisome proliferators-activated receptors (PPARs), were first described. Like other members of the nuclear receptors superfamily, PPARs have been defined as critical sensors and master regulators of cellular metabolism. Recognized as ligand-activated transcription factors, they are involved in lipid, glucose and amino acid metabolism, taking part in different cellular processes, including cellular differentiation and apoptosis, inflammatory modulation and attenuation of acute and chronic neurological damage in vivo and in vitro...
February 20, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28220571/genetic-risk-factors-for-cognitive-decline-in-parkinson-s-disease-a-review-of-the-literature
#17
REVIEW
E S Fagan, L Pihlstrøm
Parkinson's disease is a highly heterogeneous disorder, where genetic factors are likely to contribute to clinical variability, including susceptibility to cognitive impairment and dementia. Monogenic forms of parkinsonism show distinct cognitive profiles, yet less is known about the impact of common genetic variants on cognition in sporadic Parkinson's disease. In a systematic review of the literature, the current results from genetic association studies of cognitive outcomes are summarized and prospects and challenges for future studies are discussed...
February 21, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28220542/the-gut-microbiome-in-human-neurological-disease-a-review
#18
REVIEW
Helen Tremlett, Kylynda C Bauer, Silke Appel-Cresswell, Brett B Finlay, Emmanuelle Waubant
Almost half the cells and 1% of the unique genes found in our bodies are human, the rest are from microbes; predominantly bacteria, archaea, fungi, and viruses. These microorganisms collectively form the human microbiota, with most colonizing the gut. Recent technological advances, open access data-libraries, and application of high throughput sequencing have allowed these microbes to be identified and their contribution to neurological health examined. Emerging evidence links perturbations in the gut microbiota to neurological disease, including disease risk, activity, and progression...
February 21, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28220396/evaluation-of-the-turning-characteristics-according-to-the-severity-of-parkinson-disease-during-the-timed-up-and-go-test
#19
Minji Son, Changhong Youm, Sangmyung Cheon, Jaewoo Kim, Meounggon Lee, Youkyung Kim, Jinhee Kim, Hyeryun Sung
BACKGROUND: Patients with Parkinson disease (PD) experience problems such as falls and freezing of gait during walking and turning in daily activities. However, few studies have examined the relationship between simultaneous turning tasks and the severity of PD. AIM: To investigate turning characteristics in patients with PD using three-dimensional (3D) analysis during the timed up and go (TUG) test. METHODS: Thirty individuals performed the TUG test under 3D motion analysis: 10 patients with Hoehn and Yahr (H&Y) stages 2...
February 20, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28220269/is-cerebral-vasomotor-reactivity-impaired-in-parkinson-disease
#20
Martha F Hanby, Ronney B Panerai, Thompson G Robinson, Victoria J Haunton
PURPOSE: The ability of a blood vessel to change diameter in response to a change in carbon dioxide concentration is often referred to as vasomotor reactivity. This study aimed to determine whether vasomotor reactivity is impaired in patients with idiopathic Parkinson's Disease in comparison to healthy controls. METHODS: Transcranial Doppler was used to measure cerebral blood flow velocity in the middle cerebral arteries at baseline and under hypocapnic conditions in 40 patients with idiopathic Parkinson's disease and 50 healthy controls...
February 20, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
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