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https://www.readbyqxmd.com/read/28821018/a-cross-language-study-of-acoustic-predictors-of-speech-intelligibility-in-individuals-with-parkinson-s-disease
#1
Yunjung Kim, Yaelin Choi
Purpose: The present study aimed to compare acoustic models of speech intelligibility in individuals with the same disease (Parkinson's disease [PD]) and presumably similar underlying neuropathologies but with different native languages (American English [AE] and Korean). Method: A total of 48 speakers from the 4 speaker groups (AE speakers with PD, Korean speakers with PD, healthy English speakers, and healthy Korean speakers) were asked to read a paragraph in their native languages...
August 18, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28820786/models-of-care-delivery-for-patients-with-parkinson-disease-living-in-rural-areas
#2
Kristin A Schuller, Brooke Vaughan, Ian Wright
The elderly who suffer from chronic conditions have an increasingly difficult time accessing health care in rural areas compared with their healthy counterparts who seek and utilize less specialty care. Parkinson disease affects approximately 0.3% to 5% of the elderly population. However, a large portion of that population has difficulty accessing health care. The purpose of this study was to obtain an understanding of the access to care issues for patients with Parkinson disease and review solutions to aid their provision of care...
October 2017: Family & Community Health
https://www.readbyqxmd.com/read/28820738/the-effects-of-transcranial-direct-current-stimulation-on-short-interval-intracortical-inhibition-and-intracortical-facilitation-a-systematic-review-and-meta-analysis
#3
Mana Biabani, Maryam Aminitehrani, Maryam Zoghi, Michael Farrell, Gary Egan, Shapour Jaberzadeh
Transcranial direct current stimulation (tDCS) is increasingly being used to affect the neurological conditions with deficient intracortical synaptic activities (i.e. Parkinson's disease and epilepsy). In addition, it is suggested that the lasting effects of tDCS on corticospinal excitability (CSE) have intracortical origin. This systematic review and meta-analysis aimed to examine whether tDCS has any effect on intracortical circuits. Eleven electronic databases were searched for the studies investigating intracortical changes induced by anodal (a) and cathodal (c) tDCS, in healthy individuals, using two paired-pulse transcranial magnetic stimulation (TMS) paradigms: short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF)...
August 18, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28820437/are-astrocytes-the-predominant-cell-type-for-activation-of-nrf2-in-aging-and-neurodegeneration
#4
REVIEW
Jeffrey R Liddell
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor that regulates hundreds of antioxidant genes, and is activated in response to oxidative stress. Given that many neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, Huntington's disease and multiple sclerosis are characterised by oxidative stress, Nrf2 is commonly activated in these diseases. Evidence demonstrates that Nrf2 activity is repressed in neurons in vitro, and only cultured astrocytes respond strongly to Nrf2 inducers, leading to the interpretation that Nrf2 signalling is largely restricted to astrocytes...
August 18, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28820253/bioinorganic-chemistry-of-parkinson-s-disease-affinity-and-structural-features-of-cu-i-binding-to-the-full-length-%C3%AE-synuclein-protein
#5
Marco C Miotto, Mayra D Pavese, Liliana Quintanar, Markus Zweckstetter, Christian Griesinger, Claudio O Fernández
Alterations in the levels of copper in brain tissue and formation of α-synuclein (αS)-copper complexes might play a key role in the amyloid aggregation of αS and the onset of Parkinson's disease (PD). Recently, we demonstrated that formation of the high-affinity Cu(I) complex with the N-terminally acetylated form of the protein αS substantially increases and stabilizes local conformations with α-helical secondary structure and restricted motility. In this work, we performed a detailed NMR-based structural characterization of the Cu(I) complexes with the full-length acetylated form of its homologue β-synuclein (βS), which is colocalized with αS in vivo and can bind copper ions...
August 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28820064/flow-cytometric-analysis-of-protein-aggregates
#6
Abhijit Chakrabarti, Sushanta Debnath, Bikram Nath
Misfolding of proteins often leads to aggregation. Accumulation of diverse protein aggregates in various cells, tissue and organs is the hallmark of many diseases, such as Alzheimer's disease and Parkinson's disease. In this report, we present a novel method of characterization of protein aggregates, associated with differential toxicity with different size and composition in vitro using flow cytometry. Autofluorescence and scattering intensities could distinguish between amyloid and non-amyloid aggregates...
August 18, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28820063/loss-in-toxic-function-of-aggregates-of-%C3%AE-synuclein-mutants-by-a-%C3%AE-synuclein-derived-peptide
#7
Soheila Mohammadi, Maryam Nikkhah, Saman Hosseinkhani
Parkinson's disease (PD) primarily results from a severe and selective damage of dopaminergic neurons. The neuropathological hallmark of the disease is the presence of inclusions known as Lewy bodies, that are enriched in α-Synuclein (αS) nanofibrils, within the surviving neurons. The inhibition of αS aggregation is considered as an efficient approach for preventing or treating PD. To date, several researchers have been focused on screening for the inhibitors that are able to block, slow down, or reverse αS aggregation, particularly at its early stages...
August 18, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28820054/qsar-modeling-of-histamine-h3r-antagonists-inverse-agonists-as-future-drugs-for-neurodegenerative-diseases
#8
Michelle Fidelis Corrêa, João Paulo Dos Santos Fernandes
Histamine H3 receptor (H3R) is associated with several neuropsychological diseases. It is predominantly expressed in the central nervous system as presynaptic receptor, especially in regions associated with cognition and behavior, and is responsible for modulate the synthesis and release of histamine and other neurotransmitters such as acetylcholine, dopamine and serotonin. Therefore, H3R is an important target involved in several CNS disorders, such as narcolepsy, attention deficit hyperactivity disorder and schizophrenia...
August 17, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28819888/paraquat-induced-movement-disorder-in-relation-to-oxidative-stress-mediated-neurodegeneration-in-the-brain-of-drosophila-melanogaster
#9
S Niveditha, S R Ramesh, T Shivanandappa
Exposure to pesticides like paraquat (PQ) is considered as a risk factor for Parkinson's disease (PD). PQ has been shown to induce PD-like phenotype in experimental animals. Drosophila, a valuable laboratory model organism, is widely used to study neurodegenerative disorders including PD. The acute (single dose) PQ model of PD in Drosophila is associated with high mortality as well as reversibility of locomotor deficits and, therefore, does not replicate the disease phenotype. We have investigated the relevance of the acute and multiple (sublethal) dose of PQ to induce PD-like symptoms in Drosophila and shown that multiple-dose of PQ induces irreversible locomotor impairment without significant mortality...
August 18, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28819676/granger-causality-supports-abnormal-functional-connectivity-of-beta-oscillations-in-the-dorsolateral-striatum-and-substantia-nigra-pars-reticulata-in-hemiparkinsonian-rats
#10
Qiang Wang, Min Li, Zhengyuan Xie, Junbin Cai, Nanxiang Li, Hu Xiao, Ning Wang, Jinyan Wang, Fei Luo, Wangming Zhang
Synchronized oscillatory neuronal activity in the beta frequency range has been reported in the basal ganglia (BG) of patients with Parkinson disease (PD) and PD animal models. The coherent abnormal oscillatory activities in the dorsolateral striatum (dStr) and substantia nigra pars reticulata (SNr) that accompany parkinsonian states have not been resolved. In this study, we recorded local field potentials (LFPs) in the dStr and SNr of 6-hydroxydopamine (6-OHDA)-induced dopamine (DA)-lesioned rats in an awake, resting state...
August 17, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28819579/dual-task-performance-in-gba-parkinson-s-disease
#11
Karin Srulijes, Kathrin Brockmann, Senait Ogbamicael, Markus A Hobert, Ann-Kathrin Hauser, Claudia Schulte, Jasmin Fritzen, Michael Schwenk, Thomas Gasser, Daniela Berg, Walter Maetzler
INTRODUCTION: Parkinson's disease patients carrying a heterozygous mutation in the gene glucocerebrosidase (GBA-PD) show faster motor and cognitive decline than idiopathic Parkinson's disease (iPD) patients, but the mechanisms behind this observation are not well understood. Successful dual tasking (DT) requires a smooth integration of motor and nonmotor operations. This study compared the DT performances between GBA-PD and iPD patients. METHODS: Eleven GBA-PD patients (p...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28819547/continuous-force-decoding-from-deep-brain-local-field-potentials-for-brain-computer-interfacing
#12
Syed A Shah, Huiling Tan, Peter Brown
Current Brain Computer Interface (BCI) systems are limited by relying on neuronal spikes and decoding limited to kinematics only. For a BCI system to be practically useful, it should be able to decode brain information on a continuous basis with low latency. This study investigates if force can be decoded from local field potentials (LFP) recorded with deep brain electrodes located at the Subthalamic nucleus (STN) using data from 5 patients with Parkinson's disease, on a continuous basis with low latency. A Wiener-Cascade (WC) model based decoder was proposed using both time-domain and frequency-domain features...
2017: International IEEE/EMBS Conference on Neural Engineering: [proceedings]
https://www.readbyqxmd.com/read/28819229/cryo-em-analysis-of-homodimeric-full-length-lrrk2-and-lrrk1-protein-complexes
#13
Kushal Sejwal, Mohamed Chami, Hervé Rémigy, Renée Vancraenenbroeck, William Sibran, Rosmarie Sütterlin, Paul Baumgartner, Robert McLeod, Marie-Christine Chartier-Harlin, Veerle Baekelandt, Henning Stahlberg, Jean-Marc Taymans
Leucine-rich repeat kinase 2 (LRRK2) is a large multidomain protein implicated in the pathogenesis of both familial and sporadic Parkinson's disease (PD), and currently one of the most promising therapeutic targets for drug design in Parkinson's disease. In contrast, LRRK1, the closest homologue to LRRK2, does not play any role in PD. Here, we use cryo-electron microscopy (cryo-EM) and single particle analysis to gain structural insight into the full-length dimeric structures of LRRK2 and LRRK1. Differential scanning fluorimetry-based screening of purification buffers showed that elution of the purified LRRK2 protein in a high pH buffer is beneficial in obtaining high quality cryo-EM images...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819044/the-parkinson-s-disease-associated-protein-dj-1-plays-a-positive-nonmitochondrial-role-in-endocytosis-in-dictyostelium-cells
#14
Suwei Chen, Sarah J Annesley, Rasha A F Jasim, Vanessa J Musco, Oana Sanislav, Paul R Fisher
The loss of function of DJ-1 caused by mutations of DJ-1 causes a form of familial Parkinson's Disease (PD). However, the role of DJ-1 in healthy and in PD cells is poorly understood. Even its subcellular localization in mammalian cells is uncertain, both cytosolic and mitochondrial locations having been reported. We show here that DJ-1 is normally located in the cytoplasm in healthy Dictyostelium discoideum cells. With its unique life cycle, straightforward genotype-phenotype relationships, experimental accesibility and genetic tractability, Dictyostelium discoideum offers an attractive model to investigate the roles of PD-associated genes...
August 17, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28818698/a-novel-epm2a-mutation-in-a-patient-with-lafora-disease-presenting-with-early-parkinsonism-symptoms-in-childhood
#15
Edibe Pembegul Yildiz, Gozde Yesil, Melis Ulak Ozkan, Gonca Bektas, Mine Caliskan, Meral Ozmen
No abstract text is available yet for this article.
July 27, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28818561/the-rise-and-fall-of-impulse-control-behavior-disorders
#16
Giovanni Cossu, Roberta Rinaldi, Carlo Colosimo
INTRODUCTION: Impulse control disorders (ICDs) are psychiatric disorders characterized by the failure to resist an impulse or by the temptation to perform an act that is harmful to oneself or to others. METHODS: ICDs, including pathological gambling, hypersexuality, compulsive eating and shopping, can occur as a complication of Parkinson's disease (PD) together with other behavioral disorders, including dopamine dysregulation syndrome. This review is based on a literature search updated to May 2017, focusing on the epidemiology, clinical features, and therapeutic options of ICDs associated with PD...
August 1, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28818560/rotigotine-for-nocturnal-hypokinesia-in-parkinson-s-disease-quantitative-analysis-of-efficacy-from-a-randomized-placebo-controlled-trial-using-an-axial-inertial-sensor
#17
Roongroj Bhidayasiri, Jirada Sringean, Suchapit Chaiwong, Chanawat Anan, Nuntiwat Penkeaw, Amarinee Leaknok, Kamolwan Boonpang, Karn Saksornchai, Watchara Rattanachaisit, Chusak Thanawattano, Priya Jagota
BACKGROUND: Nocturnal hypokinesia is a common symptom in Parkinson's disease (PD), negatively affecting quality of life of both patients and caregivers. However, evidence-based treatment strategies are limited. OBJECTIVE: To evaluate the efficacy of rotigotine transdermal patch, using a wearable sensor, in the management of nocturnal immobility. METHODS: 34 PD subjects with nocturnal immobility were randomized to receive rotigotine transdermal patch (mean ± SD of 10...
August 9, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28818104/neuroprotective-properties-of-curcumin-in-toxin-base-animal-models-of-parkinson-s-disease-a-systematic-experiment-literatures-review
#18
Xin-Shi Wang, Zeng-Rui Zhang, Man-Man Zhang, Miao-Xuan Sun, Wen-Wen Wang, Cheng-Long Xie
BACKGROUND: Curcumin (diferuloylmethane), a polyphenol extracted from the plant Curcuma longa, is widely used in Southeast Asia, China and India in food preparation and for medicinal purposes. Meanwhile, the neuroprotective actions of curcumin have been documented for experimental therapy in Parkinson's disease (PD). METHODS: In this study, we used a systematic review to comprehensively assess the efficacy of curcumin in experimental PD. Using electronic and manual search for the literatures, we identified studies describing the efficacy of curcumin in animal models of PD...
August 17, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28818020/preserving-self-theorizing-the-social-and-psychological-processes-of-living-with-parkinson-disease
#19
Terrie Vann-Ward, Janice M Morse, Kathy Charmaz
The purpose of this constructivist grounded theory article is to identify, explore, and theorize the social and psychological processes used by people with Parkinson disease. Analytic procedures generated the five-stage theory of Preserving self of people with Parkinson disease: (a) making sense of symptoms, (b) defining turning points, (c) experiencing identity dilemmas, (d) reconnecting the self, and (e) envisioning a future. Reminders of former selves and capabilities were painful; participants desperately sought normalcy...
June 2017: Qualitative Health Research
https://www.readbyqxmd.com/read/28817967/pimavanserin-a-novel-antipsychotic-for-management-of-parkinson-s-disease-psychosis
#20
Yasaman Kianirad, Tanya Simuni
Parkinson's disease psychosis (PDP) may develop in up to 60% of Parkinson's patients and is associated with increased morbidity and mortality. It also correlates with depression and dementia, and can contribute to caregiver stress and burnout. Pimavanserin is the first FDA approved drug for the treatment of hallucinations and delusions associated with PDP. Areas covered: For this review, a MEDLINE literature search (via PubMed) and information provided by ACADIA Pharmaceuticals were used. References of our search results were screened for additional studies...
August 18, 2017: Expert Review of Clinical Pharmacology
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