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Parkinson’s disease

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https://www.readbyqxmd.com/read/28549077/clinical-criteria-for-subtyping-parkinson-s-disease-biomarkers-and-longitudinal-progression
#1
Seyed-Mohammad Fereshtehnejad, Yashar Zeighami, Alain Dagher, Ronald B Postuma
Parkinson's disease varies widely in clinical manifestations, course of progression and biomarker profiles from person to person. Identification of distinct Parkinson's disease subtypes is of great priority to illuminate underlying pathophysiology, predict progression and develop more efficient personalized care approaches. There is currently no clear way to define and divide subtypes in Parkinson's disease. Using data from the Parkinson's Progression Markers Initiative, we aimed to identify distinct subgroups via cluster analysis of a comprehensive dataset at baseline (i...
May 25, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28548940/microbiota-gut-brain-axis-and-the-central-nervous-system
#2
REVIEW
Xiqun Zhu, Yong Han, Jing Du, Renzhong Liu, Ketao Jin, Wei Yi
The gut and brain form the gut-brain axis through bidirectional nervous, endocrine, and immune communications. Changes in one of the organs will affect the other organs. Disorders in the composition and quantity of gut microorganisms can affect both the enteric nervous system and the central nervous system (CNS), thereby indicating the existence of a microbiota-gut-brain axis. Due to the intricate interactions between the gut and the brain, gut symbiotic microorganisms are closely associated with various CNS diseases, such as Parkinson's disease, Alzheimer's disease, schizophrenia, and multiple sclerosis...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28548894/switching-from-an-oral-dopamine-receptor-agonist-to-rotigotine-transdermal-patch-a-review-of-clinical-data-with-a-focus-on-patient-perspective
#3
Sun Ju Chung, Mahnaz Asgharnejad, Lars Bauer, Arturo Benitez, Babak Boroojerdi, Tanja Heidbrede, Allison Little, Han Joon Kim
Dopamine receptor agonists (DAs) are commonly used to treat Parkinson's disease (PD) and restless legs syndrome (RLS). In certain situations, switching from oral DAs to rotigotine transdermal patch may be beneficial for the patient (e.g., optimal symptom control/side effects/perioperative management, preference for once-daily/non-oral administration, RLS augmentation treatment). Areas covered: This narrative review summarizes available data on DA dose equivalency, dose conversions, switching schedules, safety, tolerability, efficacy and patient treatment preferences of switching from oral DAs to rotigotine (and vice versa) in patients with PD/RLS...
May 26, 2017: Expert Review of Neurotherapeutics
https://www.readbyqxmd.com/read/28548708/glucocerebrosidase-mutations-and-neuropsychiatric-phenotypes-in-parkinson-s-disease-and-lewy-body-dementias-review-and-meta-analyses
#4
REVIEW
Byron Creese, Emily Bell, Iskandar Johar, Paul Francis, Clive Ballard, Dag Aarsland
Heterozygous mutations in glucocerebrosidase gene (GBA) are a major genetic risk factor for Parkinson's disease (PD) and dementia with Lewy bodies (DLB). Recently, there has been a considerable focus on the relationship between GBA mutations and emergence of cognitive impairment and neuropsychiatric symptoms in these diseases. Here, we review the literature in this area, with a particular focus, including meta-analysis, on the key neuropsychiatric symptoms of cognitive impairment, psychosis, and depression in Parkinson's disease...
May 26, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28548309/tau-%C3%AE-synuclein-ratio-and-inflammatory-proteins-in-parkinson-s-disease-an-exploratory-study
#5
Manuel Delgado-Alvarado, Belén Gago, Ana Gorostidi, Haritz Jiménez-Urbieta, Rosalía Dacosta-Aguayo, Irene Navalpotro-Gómez, Javier Ruiz-Martínez, Alberto Bergareche, José F Martí-Massó, Pablo Martínez-Lage, Andrea Izagirre, María C Rodríguez-Oroz
BACKGROUND: No CSF or plasma biomarker has been validated for diagnosis or progression of PD. OBJECTIVES: To assess whether the CSF and plasma levels of proteins associated with PD neuropathological inclusions and with neuroinflammation might have value in the diagnosis of PD or in relation to disease severity. METHODS: CSF levels of α-synuclein, amyloid-ß1-42, total tau, and threonine-181 phosphorylated tau, as well as CSF and plasma levels of cytokines (interleukin-1ß, interleukin-2, interleukin, interferon-γ, and tumor necrosis factor α) were studied in 40 PD patients and 40 healthy controls...
May 26, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28548297/dysregulation-of-the-causative-genes-for-hereditary-parkinsonism-in-the-midbrain-in-parkinson-s-disease
#6
Yun Joong Kim, Junbeom Jeon, Jaemoon Shin, Nan Young Kim, Jeong Hoon Hong, Jae-Min Oh, SangKyoon Hong, Yeo Jin Kim, Young-Eun Kim, Suk Yun Kang, Hyeo-Il Ma, Unjoo Lee, Jeehee Yoon
BACKGROUND AND OBJECTIVES: Many hereditary movement disorders with complex phenotypes without a locus symbol prefix for familial PD present as parkinsonism; however, the dysregulation of genes associated with these phenotypes in the SNpc of PD patients has not been systematically studied. METHODS: Gene set enrichment analyses were performed using 10 previously published genome-wide expression datasets obtained by laser-captured microdissection of pigmented neurons in the SNpc...
May 26, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28547999/a-long-term-self-managed-handwriting-intervention-for-people-with-parkinson-s-disease-results-from-the-control-group-of-a-phase-ii-randomized-controlled-trial
#7
Johnny Collett, Marloes Franssen, Charlotte Winward, Hooshang Izadi, Andy Meaney, Wala Mahmoud, Marko Bogdanovic, Martin Tims, Derick Wade, Helen Dawes
OBJECTIVE: To report on the control group of a trial primarily designed to investigate exercise for improving mobility in people with Parkinson's disease (pwP). The control group undertook a handwriting intervention to control for attention and time spent practising a specific activity. DESIGN: Secondary analysis of a two-arm parallel phase II randomized controlled trial with blind assessment. SETTING: Community. PARTICIPANTS: PwP able to walk ⩾100 m and with no contraindication to exercise were recruited from the Thames Valley, UK, and randomized (1:1) to exercise or handwriting, via a concealed computer-generated list...
May 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28547771/translation-of-wnt-developmental-programs-into-stem-cell-replacement-strategies-for-the-treatment-of-parkinson-s-disease
#8
REVIEW
Enrique M Toledo, Daniel Gyllborg, Ernest Arenas
Wnt signalling is a highly conserved pathway across species that is critical for normal development and is deregulated in multiple diseases including cancer and neurodegeneration. Wnt signalling is critically required for midbrain dopaminergic (mDA) neuron development and maintenance. Understanding the molecular processes controlled by Wnt signalling may thus hold the key to understand the physiopathology and to develop novel therapies aimed at preventing the loss of mDA neurons in Parkinson's disease (PD)...
May 26, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28547577/pramipexole-overdose-associated-with-visual-hallucinations-agitation-and-myoclonus
#9
Adeline Cardon-Dunbar, Tom Robertson, Michael S Roberts, Geoffrey K Isbister
INTRODUCTION: Pramipexole is a dopamine D2 receptor agonist used to treat idiopathic Parkinson's disease and primary restless legs syndrome. There is limited information on pramipexole overdose. CASE REPORT: A 59-year-old male ingested 3 mg pramipexole, 2250 mg venlafaxine, 360 mg mirtazapine, with suicidal intent. He presented alert, had normal vital observations and normal pupillary reflexes. He was mildly agitated, reported visual hallucinations and was given 5 mg diazepam...
May 25, 2017: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/28546963/auditory-processing-abilities-of-parkinson-s-disease-patients
#10
Robert L Folmer, Jay J Vachhani, Sarah M Theodoroff, Rachel Ellinger, Amy Riggins
Since Parkinson's Disease (PD) primarily affects older people, a majority of PD patients have age-related hearing loss (HL) that will worsen over time. The goal of this study was to assess peripheral and central auditory functions in a population of PD patients and compare the results with a group of age-matched control subjects. Study participants included 35 adults with PD (mean age = 66.9 ± 11.2 years) and a group of 35 healthy control subjects (mean age = 65.4 ± 12.3 years). Assessments included questionnaires, neuropsychological tests, audiometric testing, and a battery of central auditory processing tests...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28546865/parkinson-disease-in-gaucher-disease
#11
Federico Rodriguez-Porcel, Alberto J Espay, Miryam Carecchio
BACKGROUND: Gaucher disease (GD) is an inborn error of metabolism caused by mutations in the gene (GBA) coding for glucocerebrosidase (GCase), inherited in an autosomal recessive pattern. GD patients have up to 9% risk of developing PD. CASE PRESENTATION: We report two patients with GD that developed PD at different disease stages. CONCLUSION: We reviewed the literature on the coexistence of PD and GD and speculate that the severity of symptoms may be related to the type of GBA mutation inherited...
2017: Journal of Clinical Movement Disorders
https://www.readbyqxmd.com/read/28545788/the-factor-structure-of-the-brief-symptom-inventory-18-bsi-18-in-parkinson-disease-patients
#12
Danielle S Abraham, Ann L Gruber-Baldini, Donna Harrington, Lisa M Shulman
OBJECTIVE: Psychological distress is common among Parkinson disease (PD) patients. Screening tools, such as the Brief Symptom Inventory-18 (BSI-18), help clinicians to identify and manage PD patients with psychiatric symptoms. The objective of this study is to test the factor structure of the BSI-18 in PD patients. METHODS: Analysis was conducted on PD patients who had initial visits at a movement disorders center from 2004 to 2015. Univariate analysis was used to describe the distribution of socio-demographic and clinical characteristics...
May 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28545724/the-role-of-ca-2-in-cell-death-caused-by-oxidative-glutamate-toxicity-and-ferroptosis
#13
REVIEW
Pamela Maher, Klaus van Leyen, Partha Narayan Dey, Birgit Honrath, Amalia Dolga, Axel Methner
Ca(2+) ions play a fundamental role in cell death mediated by oxidative glutamate toxicity or oxytosis, a form of programmed cell death similar and possibly identical to other forms of cell death like ferroptosis. Ca(2+) influx from the extracellular space occurs late in a cascade characterized by depletion of the intracellular antioxidant glutathione, increases in cytosolic reactive oxygen species and mitochondrial dysfunction. Here, we aim to compare oxidative glutamate toxicity with ferroptosis, address the signaling pathways that culminate in Ca(2+) influx and cell death and discuss the proteins that mediate this...
May 12, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28545550/genetic-variation-in-neurodegenerative-diseases-and-its-accessibility-in-the-model-organism-caenorhabditis-elegans
#14
REVIEW
Yiru Anning Wang, Jan Edward Kammenga, Simon Crawford Harvey
BACKGROUND: Neurodegenerative diseases (NGDs) such as Alzheimer's and Parkinson's are debilitating and largely untreatable conditions strongly linked to age. The clinical, neuropathological, and genetic components of NGDs indicate that neurodegeneration is a complex trait determined by multiple genes and by the environment. MAIN BODY: The symptoms of NGDs differ among individuals due to their genetic background, and this variation affects the onset and progression of NGD and NGD-like states...
May 25, 2017: Human Genomics
https://www.readbyqxmd.com/read/28545479/endoplasmic-reticulum-stress-and-inflammation-in-the-central-nervous-system
#15
REVIEW
Neil T Sprenkle, Savannah G Sims, Cristina L Sánchez, Gordon P Meares
Persistent endoplasmic reticulum (ER) stress is thought to drive the pathology of many chronic disorders due to its potential to elicit aberrant inflammatory signaling and facilitate cell death. In neurodegenerative diseases, the accumulation of misfolded proteins and concomitant induction of ER stress in neurons contributes to neuronal dysfunction. In addition, ER stress responses induced in the surrounding neuroglia may promote disease progression by coordinating damaging inflammatory responses, which help fuel a neurotoxic milieu...
May 25, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28545383/quinolinic-carboxylic-acid-derivatives-as-potential-multi-target-compounds-for-neurodegeneration-monoamine-oxidase-and-cholinesterase-inhibition
#16
Nehal Afreen Khan, Imtiaz Khan, Syed Mobasher Ali Abid, Sumera Zaib, Aliya Ibrar, Hina Andleeb, Shahid Hameed, Jamshed Iqbal
BACKGROUND: Parkinson's disease (PD), a debilitating and progressive disorder, is among the most challenging and devastating neurodegenerative diseases predominantly affecting the people over 60 years of age. OBJECTIVES: To confront PD, an advanced and operational strategy is to design single chemical functionality able to control more than one target instantaneously. METHODS: In this endeavor, for the exploration of new and efficient inhibitors of Parkinson's disease, we synthesized a series of quinoline carboxylic acids (3a‒j) and evaluated their in-vitro monoamine oxidase and cholinesterase inhibitory activities...
May 25, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28545084/feasibility-study-of-tspo-quantification-with-18f-feppa-using-population-based-input-function
#17
Rostom Mabrouk, Antonio P Strafella, Dunja Knezevic, Christine Ghadery, Romina Mizrahi, Avideh Gharehgazlou, Yuko Koshimori, Sylvain Houle, Pablo Rusjan
PURPOSE: The input function (IF) is a core element in the quantification of Translocator protein 18 kDa with positron emission tomography (PET), as no suitable reference region with negligible binding has been identified. Arterial blood sampling is indeed needed to create the IF (ASIF). In the present manuscript we study individualization of a population based input function (PBIF) with a single arterial manual sample to estimate total distribution volume (VT) for [18F]FEPPA and to replicate previously published clinical studies in which the ASIF was used...
2017: PloS One
https://www.readbyqxmd.com/read/28544951/clinical-balance-scales-indicate-worse-postural-control-in-people-with-parkinson-s-disease-who-exhibit-freezing-of-gait-compared-to-those-who-do-not-a-meta-analysis
#18
REVIEW
Esther M J Bekkers, Bauke W Dijkstra, Kim Dockx, Elke Heremans, Sabine M P Verschueren, Alice Nieuwboer
Postural instability and freezing of gait (FOG) are key features of Parkinson's disease (PD) that are closely related to falls. Uncovering the postural control differences between individuals with and without FOG contributes to our understanding of the relationship between these phenomena. The objective of this meta-analysis was to investigate whether postural control deficits, as detected by clinical balance scales, were more apparent in FOG+ compared to FOG-. Furthermore, we aimed to identify whether different scales were equally sensitive to detect postural control deficits and whether medication affected postural control differentially in each subgroup...
May 11, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544038/supplementation-with-herbal-extracts-to-promote-behavioral-and-neuroprotective-effects-in-experimental-models-of-parkinson-s-disease-a-systematic-review
#19
REVIEW
Ianara Mendonça da Costa, José Rodolfo Lopes de Paiva Cavalcanti, Dinalva Brito de Queiroz, Eduardo Pereira de Azevedo, Amália Cinthia Meneses do Rêgo, Irami Araújo Filho, Paulo Parente, Marco Antônio Botelho, Fausto Pierdoná Guzen
Parkinson's disease (PD) consists of a neurodegenerative pathology that has received a considerable amount of attention because of its clinical manifestations. The most common treatment consists of administering the drugs levodopa and biperiden, which reduce the effectiveness of the disease and the progress of its symptoms. However, phytotherapy treatment of PD has shown great potential in retarding the loss of dopaminergic neurons and minimizing the behavioral abnormalities. The aim of this study is to systematically review the use of supplemental herbal plants with cellular protective effect and behavioral activity in in vivo and in vitro experimental models...
May 22, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28543969/the-public-s-perception-of-the-role-of-community-pharmacists-in-wales
#20
Joanne Kember, Karen Hodson, Delyth H James
OBJECTIVE: To investigate the general public's perceptions of the community pharmacist's (CP) role in Wales by exploring understanding, awareness of services provided and potential interventions for promoting the role of CPs. METHODS: Qualitative methodology using focus group (FG) discussions exploring opinions, facilitated by a moderator (pharmacist) and an assistant. Topics discussed included the following: what a CP does; reasons for visiting; from whom they seek advice on medicines or lifestyle issues; use of traditional and newer services and promotion of services...
May 24, 2017: International Journal of Pharmacy Practice
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