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https://www.readbyqxmd.com/read/28937602/licochalcone-a-prevents-the-loss-of-dopaminergic-neurons-by-inhibiting-microglial-activation-in-lipopolysaccharide-lps-induced-parkinson-s-disease-models
#1
Bingxu Huang, Juxiong Liu, Chen Ju, Dongxue Yang, Guangxin Chen, Shiyao Xu, Yalong Zeng, Xuan Yan, Wei Wang, Dianfeng Liu, Shoupeng Fu
The neuroprotective effects of Licochalcone A (Lico.A), a flavonoid isolated from the herb licorice, in Parkinson's disease (PD) have not been elucidated. The prominent pathological feature of PD is the loss of dopaminergic neurons. The crucial role of neuroinflammation induced by activated microglia in dopaminergic neurodegeneration has been validated. In this study, we explore the therapeutic effects of Lico.A in lipopolysaccharide (LPS)-induced PD models in vivo and in vitro. We find that Lico.A significantly inhibits LPS-stimulated production of pro-inflammatory mediators and microglial activation by blocking the phosphorylation of extracellular signal-regulated kinase (ERK1/2) and nuclear factor κB (NF-κB) p65 in BV-2 cells...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28937035/effects-of-pinealectomy-and-gonadectomy-on-olfactory-bulb-dopaminergic-neurons-in-rats
#2
Yan Li, Jian Zhu, Ying Wang, Lei Guo, Lei Li, Dong Wang
BACKGROUND: Olfactory disorder is an early manifestation of Parkinson's disease (PD), likely to be associated with abnormalities of the dopaminergic neurons in the olfactory bulb (OB); however, the causes of olfactory disorder in PD are not entirely clear. Some studies showed that melatonin (MT) and androgens (mainly testosterone, T) might participate in the pathogenesis of PD. The research aimed to investigate effects of MT or T deficiency on OB dopaminergic neurons in rats. METHODS: One hundred and twenty normal male Wistar rats were randomly divided into the control, sham operation pinealectomy (PX), sham operation gonadectomy (GDX), PX, GDX, and PX + GDX groups...
October 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28937033/transcranial-sonographic-alterations-of-substantia-nigra-and-third-ventricle-in-parkinson-s-disease-with-or-without-dementia
#3
Zhi-Fen Dong, Cai-Shan Wang, Ying-Chun Zhang, Ying Zhang, Yu-Jing Sheng, Hua Hu, Wei-Feng Luo, Chun-Feng Liu
BACKGROUND: Numerous studies have demonstrated that patients with Parkinson's disease (PD) have a higher prevalence of substantia nigra (SN) hyperechogenicity compared with controls. Our aim was to explore the neuroimaging characteristics of transcranial sonography (TCS) of patients with PD and those with PD with dementia (PDD). The correlation between the echogenicity of the SN and clinical symptoms in Chinese patients with PDD was also assessed. METHODS: The ratios of SN hyperechogenicity (SN+), maximum sizes of SN+, and widths of third ventricle (TV) were measured using TCS for all the recruited patients...
October 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28936761/biomarkers-for-parkinson-s-disease-recent-advancement
#4
REVIEW
Sharvari Lotankar, Kedar S Prabhavalkar, Lokesh K Bhatt
As a multi-factorial degenerative disease, Parkinson's disease (PD) leads to tremor, gait rigidity, and hypokinesia, thus hampering normal living. As this disease is usually detected in the later stages when neurons have degenerated completely, cure is on hold, ultimately leading to death due to the lack of early diagnostic techniques. Thus, biomarkers are required to detect the disease in the early stages when prevention is possible. Various biomarkers providing early diagnosis of the disease include those of imaging, cerebrospinal fluid, oxidative stress, neuroprotection, and inflammation...
September 21, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28936754/biomarker-discovery-in-parkinson-s-disease-present-challenges-and-future-opportunities
#5
EDITORIAL
Song Li, Weidong Le
No abstract text is available yet for this article.
September 21, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28936169/movement-related-activity-of-human-subthalamic-neurons-during-a-reach-to-grasp-task
#6
Monika Pötter-Nerger, Rene Reese, Frank Steigerwald, Jan Arne Heiden, Jan Herzog, Christian K E Moll, Wolfgang Hamel, Uri Ramirez-Pasos, Daniela Falk, Maximilian Mehdorn, Christian Gerloff, Günther Deuschl, Jens Volkmann
The aim of the study was to record movement-related single unit activity (SUA) in the human subthalamic nucleus (STN) during a standardized motor task of the upper limb. We performed microrecordings from the motor region of the human STN and registered kinematic data in 12 patients with Parkinson's disease (PD) undergoing deep brain stimulation surgery (seven women, mean age 62.0 ± 4.7 years) while they intraoperatively performed visually cued reach-to-grasp movements using a grip device. SUA was analyzed offline in relation to different aspects of the movement (attention, start of the movement, movement velocity, button press) in terms of firing frequency, firing pattern, and oscillation...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28935216/allosteric-modulators-targeting-cns-muscarinic-receptors
#7
REVIEW
Andreas Bock, Ramona Schrage, Klaus Mohr
Muscarinic acetylcholine receptors are G protein-coupled receptors (GPCRs) which are broadly expressed in the central nervous system (CNS) and other tissues in the periphery. They emerge as important drug targets for a number of diseases including Alzheimer's disease, Parkinson's disease, and schizophrenia. Muscarinic receptors are divided into five subtypes (M1-M5) of which M1-M4 have been crystalized. All subtypes possess at least one allosteric binding site which is located in the extracellular region of the receptor on top of the ACh (i...
September 18, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28934750/frontotemporal-dementia-caused-by-the-p301l-mutation-in-the-mapt-gene-clinicopathological-features-of-13-cases-from-the-same-geographical-origin-in-barcelona-spain
#8
Sergi Borrego-Écija, Joana Morgado, Leire Palencia-Madrid, Oriol Grau-Rivera, Ramón Reñé, Isabel Hernández, Consuelo Almenar, Mircea Balasa, Anna Antonell, José Luis Molinuevo, Albert Lladó, Marian Martínez de Pancorbo, Ellen Gelpi, Raquel Sánchez-Valle
BACKGROUND/AIMS: We identified and studied 13 patients carrying the P301L mutation in the MAPT gene from the same area (Baix Llobregat County) in Barcelona, Spain. METHODS: The demographic and clinical features were reviewed retrospectively. Detailed neuropathological characterization was obtained in 9 subjects. To investigate the origin of the P301L mutation in these families, 20 single nucleotide polymorphisms (SNPs) in the MAPT gene were analyzed. RESULTS: The mean age at disease onset was 51 years and the mean disease duration was 7 years...
September 22, 2017: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/28934619/distinct-brain-metabolic-patterns-separately-associated-with-cognition-motor-function-and-aging-in-parkinson-s-disease-dementia
#9
Ji Hyun Ko, Audrey Katako, Maram Aljuaid, Andrew L Goertzen, Andrew Borys, Douglas E Hobson, Seok Min Kim, Chong Sik Lee
We explored whether patients with Parkinson's disease dementia (PDD) show a distinct spatial metabolic pattern that characterizes cognitive deficits in addition to motor dysfunction. Eighteen patients with PDD underwent 3 separate positron emission tomography sessions with [(18)F]fluorodeoxyglucose (for glucose metabolism), fluorinated N-3-fluoropropyl-2-beta-carboxymethoxy-3-beta-(4-iodophenyl) nortropane (for dopamine transporter density) and Pittsburgh compound-B (for beta-amyloid load). We confirmed in PDD versus normal controls, overall hypometabolism in the posterior and prefrontal brain regions accompanied with hypermetabolism in subcortical structures and the cerebellar vermis...
August 31, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28934392/nceh-1-modulates-cholesterol-metabolism-and-protects-against-%C3%AE-synuclein-toxicity-in-a-c-elegans-model-of-parkinson-s-disease
#10
Siyuan Zhang, Samantha A Glukhova, Kim A Caldwell, Guy A Caldwell
Parkinson's disease (PD) is an aging-associated neurodegenerative disease affecting millions worldwide. Misfolding, oligomerization and accumulation of the human α-synuclein protein is a key pathological hallmark of PD and is associated with the progressive loss of dopaminergic neurons over the course of aging. Lifespan extension via the suppression of IGF-1/insulin-like signaling (IIS) offers a possibility to retard disease onset through induction of metabolic changes that provide neuroprotection. The nceh-1 gene of Caenorhabditis elegans encodes an ortholog of neutral cholesterol ester hydrolase 1 (NCEH-1), an IIS downstream protein that was identified in a screen as a modulator of α-synuclein accumulation in vivo...
October 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28934248/vps35-deficiency-impairs-slc4a11-trafficking-and-promotes-corneal-dystrophy
#11
Wei Liu, Fu-Lei Tang, Sen Lin, Kai Zhao, Lin Mei, Jian Ye, Wen-Cheng Xiong
Vps35 (vacuolar protein sorting 35) is a major component of retromer that selectively promotes endosome-to-Golgi retrieval of transmembrane proteins. Dysfunction of retromer is a risk factor for the pathogenesis of Parkinson's disease (PD) and Alzheimer's disease (AD). However, Vps35/retromer's function in the eye or the contribution of Vps35-deficiency to eye degenerative disorders remains to be explored. Here we provide evidence for a critical role of Vps35 in mouse corneal dystrophy. Vps35 is expressed in mouse and human cornea...
2017: PloS One
https://www.readbyqxmd.com/read/28933786/pink1-interacts-with-%C3%AE-synuclein-and-abrogates-%C3%AE-synuclein-induced-neurotoxicity-by-activating-autophagy
#12
Jia Liu, Xue Wang, Yongquan Lu, Chunli Duan, Ge Gao, Lingling Lu, Hui Yang
Parkinson's disease (PD) is one of the most common neurodegenerative diseases, characterized by degeneration of dopaminergic neurons in the substantia nigra. α-synuclein (α-syn) and PTEN-induced putative kinase (PINK)1 are two critical proteins associated with the pathogenesis of PD. α-syn induces mitochondrial deficits and apoptosis, PINK1 was found to alleviate α-syn-induced toxicity, but the mechanistic details remain obscure. Here, we show that PINK1 interacts with α-syn mainly in the cytoplasm, where it initiates autophagy...
September 21, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28933707/high-accuracy-automatic-classification-of-parkinsonian-tremor-severity-using-machine-learning-method
#13
Hyoseon Jeon, Woongwoo Lee, Hyeyoung Park, Hong Ji Lee, Sang Kyong Kim, Han Byul Kim, Beomseok Jeon, Kwang Suk Park
Although clinical aspirations for new technology to accurately measure and diagnose Parkinsonian tremors exist, automatic scoring of tremor severity using machine learning approaches has not yet been employed. Objective: This study aims to maximize the scientific validity of automatic tremor-severity classification using machine learning algorithms to score Parkinsonian tremor severity in the same manner as the Unified Parkinson's Disease Rating Scale (UPDRS) used to rate scores in real clinical practice...
September 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28933613/a-randomized-controlled-feasibility-trial-exploring-partnered-ballroom-dancing-for-people-with-parkinson-s-disease
#14
D Kunkel, C Fitton, L Roberts, R M Pickering, H C Roberts, R Wiles, S Hulbert, J Robison, A Ashburn
OBJECTIVE: To determine the feasibility of a Dance Centre delivering a programme of mixed dances to people with Parkinson's and identify suitable outcomes for a future definitive trial. DESIGN: A two-group randomized controlled feasibility trial. METHODS: People with Parkinson's were randomized to a control or experimental group (ratio 15:35), alongside usual care. In addition, participants in the experimental group danced with a partner for one hour, twice-a-week for 10 weeks; professional dance teachers led the classes and field-notes were kept...
October 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28933595/phosphoproteome-based-kinase-activity-profiling-reveals-the-critical-role-of-map2k2-and-plk1-in-neuronal-autophagy
#15
Lei-Lei Chen, Yong-Bo Wang, Ju-Xian Song, Wan-Kun Deng, Jia-Hong Lu, Li-Li Ma, Chuan-Bin Yang, Min Li, Yu Xue
Recent studies have demonstrated that dysregulation of macroautophagy/autophagy may play a central role in the pathogenesis of neurodegenerative disorders, and the induction of autophagy protects against the toxic insults of aggregate-prone proteins by enhancing their clearance. Thus, autophagy has become a promising therapeutic target against neurodegenerative diseases. In this study, quantitative phosphoproteomic profiling together with a computational analysis was performed to delineate the phosphorylation signalling networks regulated by 2 natural neuroprotective autophagy enhancers, corynoxine (Cory) and corynoxine B (Cory B)...
September 21, 2017: Autophagy
https://www.readbyqxmd.com/read/28933588/death-by-over-eating-the-gaucher-disease-associated-gene-gba1-identified-in-a-screen-for-mediators-of-autophagic-cell-death-is-necessary-for-developmental-cell-death-in-drosophila-midgut
#16
Santosh K Dasari, Eyal Schejter, Shani Bialik, Aya Shkedy, Vered Levin-Salomon, Smadar Levin-Zaidman, Adi Kimchi
Autophagy is critical for homeostasis and cell survival during stress, but can also lead to cell death, a little understood process that has been shown to contribute to developmental cell death in lower model organisms, and to human cancer cell death. We recently reported (1) on our thorough molecular and morphologic characterization of an autophagic cell death system involving resveratrol treatment of lung carcinoma cells. To gain mechanistic insight into this death program, we performed a signalome-wide RNAi screen for genes whose functions are necessary for resveratrol-induced death...
September 21, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28932811/effects-of-non-pharmacological-treatments-on-quality-of-life-in-parkinson-s-disease-a-review
#17
Sangwoo Ahn, Yan Chen, Tim Bredow, Corjena Cheung, Fang Yu
Parkinson's disease is a neurodegenerative chronic condition with a declining trajectory and lack of a cure, making quality of life an important aspect of care. The purpose of this literature review was to analyze the state-of-the-science on the effects of non-pharmacological treatments on quality of life in person's with Parkinson's disease. Literature search was conducted using keywords in electronic databases up to September 1, 2016 and cross-searching the references of identified articles. Of the 259 articles generated, 26 met the eligibility criteria and were included in this review...
April 2017: Journal of Parkinson's Disease and Alzheimer's Disease
https://www.readbyqxmd.com/read/28932206/distinguishing-different-stages-of-parkinson-s-disease-using-composite-index-of-speed-and-pen-pressure-of-sketching-a-spiral
#18
Poonam Zham, Dinesh K Kumar, Peter Dabnichki, Sridhar Poosapadi Arjunan, Sanjay Raghav
The speed and pen-pressure while sketching a spiral are lower among Parkinson's disease (PD) patients with higher severity of the disease. However, the correlation between these features and the severity level (SL) of PD has been reported to be 0.4. There is a need for identifying parameters with a stronger correlation for considering this for accurate diagnosis of the disease. This study has proposed the use of the Composite Index of Speed and Pen-pressure (CISP) of sketching as a feature for analyzing the severity of PD...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28932113/cationic-lipid-based-nanoparticles-mediate-functional-delivery-of-acetate-to-tumor-cells-in-vivo-leading-to-significant-anticancer-effects
#19
Leigh P Brody, Meliz Sahuri-Arisoylu, James R Parkinson, Harry G Parkes, Po Wah So, Nabil Hajji, E Louise Thomas, Gary S Frost, Andrew D Miller, Jimmy D Bell
Metabolic reengineering using nanoparticle delivery represents an innovative therapeutic approach to normalizing the deregulation of cellular metabolism underlying many diseases, including cancer. Here, we demonstrated a unique and novel application to the treatment of malignancy using a short-chain fatty acid (SCFA)-encapsulated lipid-based delivery system - liposome-encapsulated acetate nanoparticles for cancer applications (LITA-CAN). We assessed chronic in vivo administration of our nanoparticle in three separate murine models of colorectal cancer...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28931645/comorbidity-in-multiple-sclerosis-is-associated-with-diagnostic-delays-and-increased-mortality
#20
Anja Thormann, Per Soelberg Sørensen, Nils Koch-Henriksen, Bjarne Laursen, Melinda Magyari
OBJECTIVE: To investigate the effect of chronic comorbidity on the time of diagnosis of multiple sclerosis (MS) and on mortality in MS. METHODS: We conducted a population-based, nationwide cohort study including all incident MS cases in Denmark with first MS symptom between 1980 and 2005. To investigate the time of diagnosis, we compared individuals with and without chronic comorbidity using multinomial logistic regression. To investigate mortality, we used Cox regression with time-dependent covariates, following study participants from clinical MS onset until endpoint (death) or to the end of the study, censuring at emigration...
September 20, 2017: Neurology
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