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https://www.readbyqxmd.com/read/29241654/ginsenoside-rb1-confers-neuroprotection-via-promotion-of-glutamate-transporters-in-a-mouse-model-of-parkinson-s-disease
#1
Yun-Long Zhang, Yan Liu, Xin-Pan Kang, Chun-Yan Dou, Ren-Gong Zhuo, Shu-Qiong Huang, Li Peng, Lei Wen
Ginsenoside Rb1 has been demonstrated to protect dopaminergic (DA) neurons from death in vitro. However, the neuroprotective effects and underlying mechanism of Rb1 in treating Parkinson's disease (PD) remain uncharacterized. In this study, we explored the effects of Rb1 on the movement disorder and the underlying mechanisms based on the glutamatergic transmission and excitotoxicity in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of PD. Here, for the first time, we report that Rb1 treatment ameliorates motor deficits, prevents DA neuron death, and suppresses α-synuclein expression and astrogliosis in the MPTP mouse model of PD...
December 12, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29236963/stearic-acid-supplementation-in-high-protein-to-carbohydrate-p-c-ratio-diet-improves-physiological-and-mitochondrial-functions-of-drosophila-melanogaster-parkin-null-mutants
#2
Rijan Bajracharya, S Bustamante, J William O Ballard
Optimizing dietary macronutrients benefits the prevention and management of many human diseases but there is conflicting dietary advice for Parkinson's disease (PD), and no single strategy is universally recommended. Recently, it was shown that dietary stearic acid (C18:0) improves survival and mitochondrial functions in the parkin null Drosophila model of PD. Here we incorporate stearic acid into high protein and high carbohydrate diets and study survival, climbing ability, mitochondrial membrane potential, respiration, basal reactive oxygen species and conduct lipidomics assays...
December 11, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29234413/salidroside-protects-against-mpp-induced-neuronal-injury-through-dj-1-nrf2-antioxidant-pathway
#3
Leitao Wu, Hang Xu, Liang Cao, Tao Li, Ruru Li, Yang Feng, Jianzong Chen, Jing Ma
Parkinson's disease (PD) is the second most common neurodegenerative disorder. We have found that salidroside (Sal) exhibited neuroprotective effects against MPP+ toxicity. However, the molecular mechanism is not fully understood. In this study, we found that Sal significantly prevented MPP+-induced decrease of mRNA and protein expression of Nrf2, GCLc, SOD1, and SOD2 in SH-SY5Y cells. Moreover, silencing of Nrf2 significantly inhibited Sal-induced increase in mRNA and protein expression of GCLc, SOD1, and SOD2...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29233065/understanding-the-role-of-glycogen-synthase-kinase-3-in-l-dopa-induced-dyskinesia-in-parkinson-s-disease
#4
Hojin Choi, Seong-Ho Koh
Levodopa (L-DOPA) is the most commonly used drug for Parkinson's disease (PD), but its long-term use is associated with various complications, including L-DOPA-induced dyskinesia (LID). Many studies have suggested that L-DOPA neurotoxicity and LID are associated with glycogen synthase kinase-3 (GSK-3) activation. Areas covered: LID is caused by striatal dopamine (DA) denervation in PD and pulsatile L-DOPA treatment. These factors lead to dysregulated DA transmission, abnormal intracellular signaling and transcription factors in striatal neurons, and altered gene expression and plasticity at corticostriatal synapses...
December 12, 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/29232769/antiparkinsonian-and-antidyskinetic-profiles-of-two-novel-potent-and-selective-nociceptin-orphanin-fq-receptor-agonists
#5
Ludovico Arcuri, Salvatore Novello, Martina Frassineti, Daniela Mercatelli, Clarissa Anna Pisanò, Ilaria Morella, Stefania Fasano, Blair V Journigan, Michael E Meyer, Willma E Polgar, Riccardo Brambilla, Nurulain T Zaveri, Michele Morari
BACKGROUND AND PURPOSE: We previously showed that Nociceptin/orphanin FQ opioid peptide (NOP) receptor agonists attenuate the expression of levodopa-induced dyskinesia in animal models of Parkinson's disease. We now investigate the efficacy of two novel, potent and chemically distinct NOP receptor agonists, AT-390 and AT-403, to improve parkinsonian disabilities and attenuate dyskinesia development and expression. EXPERIMENTAL APPROACH: Binding affinity and functional efficacy of AT-390 and AT-403 at the opioid receptors were determined in radioligand displacement assays and in GTPγS binding assay respectively, conducted in Chinese hamster ovary cells...
December 12, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29230960/ciq-a-positive-allosteric-modulator-of-glun2c-d-containing-n-methyl-d-aspartate-receptors-rescues-striatal-synaptic-plasticity-deficit-in-a-mouse-model-of-parkinson-s-disease
#6
Mona Nouhi, Xiaoqun Zhang, Ning Yao, Karima Chergui
AIMS: To investigate if CIQ, a positive allosteric modulator of N-methyl-d-aspartate receptors (NMDARs) containing GluN2C/D subunits, rescues the loss of long-term potentiation (LTP) and forelimb-use asymmetry in a mouse model of Parkinson's disease (PD). METHODS: We have used electrophysiology in brain slices and the cylinder test to examine the effect of CIQ on glutamatergic synaptic transmission, synaptic plasticity, and forelimb-use in the unilateral 6-hydroxydopamine-lesion mouse model of PD...
December 11, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29229294/impact-of-dha-intake-in-a-mouse-model-of-synucleinopathy
#7
Katherine Coulombe, Olivier Kerdiles, Cyntia Tremblay, Vincent Emond, Manon Lebel, Anne-Sophie Boulianne, Mélanie Plourde, Francesca Cicchetti, Frédéric Calon
Polyunsaturated fatty acids omega-3 (n-3 PUFA), such as docosahexaenoic acid (DHA), have been shown to prevent, and partially reverse, neurotoxin-induced nigrostriatal denervation in animal models of Parkinson's disease (PD). However, the accumulation of α-synuclein (αSyn) in cerebral tissues is equally important to the pathophysiology. To determine whether DHA intake improves various aspects related to synucleinopathy, ninety male mice overexpressing human αSyn under the Thy-1 promoter (Thy1-αSyn) were fed one of three diets (specially formulated control, low n-3 PUFA or high DHA) and compared to non-transgenic C57/BL6 littermate mice exposed to a control diet...
December 8, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29228971/alpha-synuclein-oligomer-selective-antibodies-reduce-intracellular-accumulation-and-mitochondrial-impairment-in-alpha-synuclein-exposed-astrocytes
#8
Gabriel Gustafsson, Veronica Lindström, Jinar Rostami, Eva Nordström, Lars Lannfelt, Joakim Bergström, Martin Ingelsson, Anna Erlandsson
BACKGROUND: Due to its neurotoxic properties, oligomeric alpha-synuclein (α-syn) has been suggested as an attractive target for passive immunization against Parkinson's disease (PD). In mouse models of PD, antibody treatment has been shown to lower the levels of pathogenic α-syn species, including oligomers, although the mechanisms of action remain unknown. We have previously shown that astrocytes rapidly engulf α-syn oligomers that are intracellularly stored, rather than degraded, resulting in impaired mitochondria...
December 11, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29228015/development-of-an-iron-selective-antioxidant-probe-with-protective-effects-on-neuronal-function
#9
Olimpo García-Beltrán, Natalia P Mena, Pabla Aguirre, Germán Barriga-González, Antonio Galdámez, Edgar Nagles, Tatiana Adasme, Cecilia Hidalgo, Marco T Núñez
Iron accumulation, oxidative stress and calcium signaling dysregulation are common pathognomonic signs of several neurodegenerative diseases, including Parkinson´s and Alzheimer's diseases, Friedreich ataxia and Huntington's disease. Given their therapeutic potential, the identification of multifunctional compounds that suppress these damaging features is highly desirable. Here, we report the synthesis and characterization of N-(1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl)-2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetamide, named CT51, which exhibited potent free radical neutralizing activity both in vitro and in cells...
2017: PloS One
https://www.readbyqxmd.com/read/29227709/a-review-study-on-the-beneficial-effects-of-baduanjin
#10
Liye Zou, Zhujun Pan, Albert Yeung, Saira Talwar, Chaoyi Wang, Yang Liu, Yankai Shu, Xiaoan Chen, Garrett Anthony Thomas
AIM: Baduanjin, a Chinese traditional Qigong exercise that focuses on a mind-body integration, is considered to be an effective exercise in promoting health. Thus, we systematically and critically evaluated the emerging literature relating to the effects of Baduanjin on health outcomes. METHODS: We used seven English-language electronic databases for the literature search. At least one health-related parameter was reported in retrievable full-text Baduanjin intervention studies...
December 11, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/29225912/effects-of-virtual-rehabilitation-versus-conventional-physical-therapy-on-postural-control-gait-and-cognition-of-patients-with-parkinson-s-disease-study-protocol-for-a-randomized-controlled-feasibility-trial
#11
Keyte Guedes Silva, Tatiana Beline De Freitas, Flávia Doná, Fernando Freitas Ganança, Henrique Ballalai Ferraz, Camila Torriani-Pasin, José Eduardo Pompeu
Background: There is an association among postural instability, gait dysfunction, and cognitive impairment in subjects with Parkinson's disease (PD). Difficulty in dividing attention, response inhibition, and visuospatial attention deficiencies may contribute to the impairment of motor performance during daily activities. There are strong evidences that physical therapy can prevent physical and cognitive decline in individuals with PD. Recently, the European Physiotherapy Guideline (EPG) was developed based on randomized clinical trials about the effectiveness of the physical therapy to improve the functional deficiencies of individuals with PD...
2017: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/29225181/the-effect-of-green-synthesis-silver-nanoparticles-agnps-from-pulicaria-undulata-on-the-amyloid-formation-in-%C3%AE-lactalbumin-and-the-chaperon-action-of-%C3%AE-casein
#12
Mansoor Dehvari, Arezou Ghahghaei
The formation and deposition of protein fibrillar aggregates in the tissues is associated with several neurodegenerative diseases such as Alzheimer's and Parkinson's disease. Molecular chaperones are a family of proteins that are believed to have the ability to inhibit protein aggregation. The present study examines the effect of different concentrations of green synthesis silver nanoparticles (AgNPs) from Pulicaria undulata L. on the aggregation of α-lactalbumin (α-LA) and the chaperone action of αs-casein...
December 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29217686/synaptic-regulator-%C3%AE-synuclein-in-dopaminergic-fibers-is-essentially-required-for-the-maintenance-of-subependymal-neural-stem-cells
#13
Ana Perez-Villalba, Mª Salomé Sirerol-Piquer, Germán Belenguer, Raúl Soriano-Cantón, Ana Belén Muñoz-Manchado, Javier Villadiego, Diana Alarcón-Arís, Federico N Soria, Benjamin Dehay, Erwan Bezard, Miquel Vila, Analía Bortolozzi, Juan José Toledo-Aral, Francisco Pérez-Sánchez, Isabel Fariñas
Synaptic protein α-synuclein (α-SYN) modulates neurotransmission in a complex and poorly understood manner and aggregates in the cytoplasm of degenerating neurons in Parkinson's disease. Here, we report that α-SYN present in dopaminergic nigral afferents is essential for the normal cycling and maintenance of neural stem cells (NSCs) in the brain subependymal zone of adult male and female mice. We also show that premature senescence of adult NSCs into non-neurogenic astrocytes in mice lacking α-SYN resembles the effects of dopaminergic fiber degeneration resulting from chronic exposure to MPTP or intranigral inoculation of aggregated toxic α-SYN...
December 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29216719/prevalent-placement-error-of-deep-brain-stimulation-electrode-in-movement-disorders-technical-considerations
#14
M Kloc, Z Kosutzka, J Steno, P Valkovic
BACKGROUND: Deep brain stimulation is an effective and safe technique. Displacement of the electrode relative to the optimal stimulation site can lead to insufficient effect and sometimes to the need of operative electrode re-position. OBJECTIVE: This study was aimed to analyse targeting accuracy of deep brain stimulation electrode implantation to subthalamic nucleus (STN) and globus pallidus internus (Gpi). It detected possible causes of inaccuracy and prevalent shift to certain direction...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29214873/a-highly-sensitive-mir-195-nanobiosensor-for-early-detection-of-parkinson-s-disease
#15
Zahra Aghili, Navid Nasirizadeh, Adeleh Divsalar, Shahram Shoeibi, Parichehreh Yaghmaei
Early detection of Parkinson's disease (PD), as a dangerous neurodegenerative disease, is a key factor in the therapy or prevention of further development of this disease. We developed an electrochemical nanobiosensor for early detection of PD based on the quantification of circulating biomarker, miR-195. Exfoliated graphene oxide (EGO) and gold nanowires (GNWs) were used to modify the surface of screen-printed carbon electrode. A single-strand thiolated probe was designed for specific hybridization with target miRNA (miR-195), and doxorubicin was used as an electrochemical indicator for differential pulse voltammetry measurements...
December 7, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29212815/rab29-activation-of-the-parkinson-s-disease-associated-lrrk2-kinase
#16
Elena Purlyte, Herschel S Dhekne, Adil R Sarhan, Rachel Gomez, Pawel Lis, Melanie Wightman, Terina N Martinez, Francesca Tonelli, Suzanne R Pfeffer, Dario R Alessi
Parkinson's disease predisposing LRRK2 kinase phosphorylates a group of Rab GTPase proteins including Rab29, within the effector-binding switch II motif. Previous work indicated that Rab29, located within the PARK16 locus mutated in Parkinson's patients, operates in a common pathway with LRRK2. Here, we show that Rab29 recruits LRRK2 to the trans-Golgi network and greatly stimulates its kinase activity. Pathogenic LRRK2 R1441G/C and Y1699C mutants that promote GTP binding are more readily recruited to the Golgi and activated by Rab29 than wild-type LRRK2...
December 6, 2017: EMBO Journal
https://www.readbyqxmd.com/read/29209434/vitamin-d-in-the-prevention-prediction-and-treatment-of-neurodegenerative-and-neuroinflammatory-diseases
#17
REVIEW
Priscilla Koduah, Friedemann Paul, Jan-Markus Dörr
Vitamin D research has gained increased attention in recent times due to its roles beyond bone health and calcium homeostasis, such as immunomodulation. In some parts of the brain and on immune cells, vitamin D hydroxylating enzymes and its receptors are located. Epidemiological evidence demonstrates that deficiency of Vitamin D is relevant for disease risk and course in multiple sclerosis (MS) and presumably also in neuromyelitis optica spectrum disorders (NMOSD), Parkinson's disease (PD), and Alzheimer's disease (AD)...
December 2017: EPMA Journal
https://www.readbyqxmd.com/read/29207498/steppogenin-isolated-from-cudrania-tricuspidata-shows-antineuroinflammatory-effects-via-nf-%C3%AE%C2%BAb-and-mapk-pathways-in-lps-stimulated-bv2-and-primary-rat-microglial-cells
#18
Dong-Cheol Kim, Tran Hong Quang, Hyuncheol Oh, Youn-Chul Kim
Excessive microglial stimulation has been recognized in several neurodegenerative diseases, including Parkinson's disease (PD), Alzheimer's disease (AD), amyotropic lateral sclerosis (ALS), HIV-associated dementia (HAD), multiple sclerosis (MS), and stroke. When microglia are stimulated, they produce proinflammatory mediators and cytokines, including nitric oxide (NO) derived from inducible NO synthase (iNOS), prostaglandin E2 (PGE₂) derived from cyclooxygenase-2 (COX-2), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-12 (IL-12), and interleukin-6 (IL-6)...
December 2, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29204935/neuroprotective-potential-of-crocin-against-malathion-induced-motor-deficit-and-neurochemical-alterations-in-rats
#19
Leila Mohammadzadeh, Hossein Hosseinzadeh, Khalil Abnous, Bibi Marjan Razavi
In several epidemiological studies, an association between pesticide exposure and the incidence of Parkinson's disease (PD) has been reported. Increasing evidence showed that oxidative stress plays an important role in the pathogenesis of PD. The present study investigated the preventive effect of crocin, saffron active components, on malathion (an organophosphate pesticide (OP))-induced Parkinson-like behaviors in rat. Rats were divided into eight groups: control (normal saline), malathion (100 mg/kg/day, i...
December 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29197200/conscious-attention-defect-and-inhibitory-control-deficit-in-parkinson-s-disease-mild-cognitive-impairment-a-comparison-study-with-amnestic-mild-cognitive-impairment-multiple-domain
#20
Davide Maria Cammisuli, Marco Timpano Sportiello
BACKGROUND: Frontal/executive dysfunction commonly occurs in Parkinso's disease - Mild Cognitive Impairment (PD-MCI patients). However, to date, the number of studies comparing PD-MCI and MCI patients of other etiologies are too small. The present study aims at clarifying the attention/working memory and executive dysfunction of PD-MCI patients in comparison to amnestic MCI multiple domain patients with first extended then abbreviated structural brain changes suggesting preclinical Alzheimer's Disease...
December 2017: Psychiatria Danubina
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