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Cognitive impairment in parkinson disease

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https://www.readbyqxmd.com/read/29047416/lessons-learned-about-f-18-av-1451-off-target-binding-from-an-autopsy-confirmed-parkinson-s-case
#1
Marta Marquié, Eline E Verwer, Avery C Meltzer, Sally Ji Who Kim, Cinthya Agüero, Jose Gonzalez, Sara J Makaretz, Michael Siao Tick Chong, Prianca Ramanan, Ana C Amaral, Marc D Normandin, Charles R Vanderburg, Stephen N Gomperts, Keith A Johnson, Matthew P Frosch, Teresa Gómez-Isla
[F-18]-AV-1451 is a novel positron emission tomography (PET) tracer with high affinity to neurofibrillary tau pathology in Alzheimer's disease (AD). PET studies have shown increased tracer retention in patients clinically diagnosed with dementia of AD type and mild cognitive impairment in regions that are known to contain tau lesions. In vivo uptake has also consistently been observed in midbrain, basal ganglia and choroid plexus in elderly individuals regardless of their clinical diagnosis, including clinically normal whose brains are not expected to harbor tau pathology in those areas...
October 19, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29046882/biased-numerical-cognition-impairs-economic-decision-making-in-parkinson-s-disease
#2
Qadeer Arshad, Angela Bonsu, Rhannon Lobo, Anne-Sophie Fluri, Rahuman Sheriff, Peter Bain, Nicola Pavese, Adolfo M Bronstein
OBJECTIVE: Previous findings suggest a context-dependent bihemispheric allocation of numerical magnitude. Accordingly, we predicted that lateralized motor symptoms in Parkinson's disease (PD), which reflect hemispheric asymmetries, would induce systematic lateralized biases in numerical cognition and have a subsequent influence on decision-making. METHODS: In 20 PD patients and matched healthy controls we assessed numerical cognition using a number-pair bisection and random number generation task...
October 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29046879/impaired-synaptic-function-is-linked-to-cognition-in-parkinson-s-disease
#3
Per Selnes, Ane Løvli Stav, Krisztina K Johansen, Atle Bjørnerud, Christopher Coello, Eirik Auning, Lisa Kalheim, Ina Selseth Almdahl, Erik Hessen, Henrik Zetterberg, Kaj Blennow, Dag Aarsland, Tormod Fladby
OBJECTIVE: Cognitive impairment is frequent in Parkinson's disease, but the underlying mechanisms are insufficiently understood. Because cortical metabolism is reduced in Parkinson's disease and closely associated with cognitive impairment, and CSF amyloid-β species are reduced and correlate with neuropsychological performance in Parkinson's disease, and amyloid-β release to interstitial fluid may be related to synaptic activity; we hypothesize that synapse dysfunction links cortical hypometabolism, reduced CSF amyloid-β, and presynaptic deposits of α-synuclein...
October 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29043468/cognitive-and-behavioral-disorders-in-parkinson-s-disease-an-update-i-cognitive-impairments
#4
Costanza Papagno, Luigi Trojano
Parkinson's disease (PD) is a progressive neurodegenerative disease characterized by motor symptoms such as rigidity, rest tremor, and bradykinesia. However, a growing body of evidence demonstrated that PD encompasses several non-motor disturbances as well, such as cognitive impairment. Cognitive defects can be present since early stages of the disease but tend to dominate the clinical picture as the disease progresses. Around 40% of patients with PD present with cognitive impairments in several cognitive domains including attention, working memory and executive functions, language, visuospatial skills, and episodic memory; in later stages of the disease, cognitive defects and associated behavioral disorders concur to determine clinically relevant PD-associated dementia...
October 17, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29042634/a-novel-quantification-driven-proteomic-strategy-identifies-an-endogenous-peptide-of-pleiotrophin-as-a-new-biomarker-of-alzheimer-s-disease
#5
Tobias Skillbäck, Niklas Mattsson, Karl Hansson, Ekaterina Mirgorodskaya, Rahil Dahlén, Wiesje van der Flier, Philip Scheltens, Floor Duits, Oskar Hansson, Charlotte Teunissen, Kaj Blennow, Henrik Zetterberg, Johan Gobom
We present a new, quantification-driven proteomic approach to identifying biomarkers. In contrast to the identification-driven approach, limited in scope to peptides that are identified by database searching in the first step, all MS data are considered to select biomarker candidates. The endopeptidome of cerebrospinal fluid from 40 Alzheimer's disease (AD) patients, 40 subjects with mild cognitive impairment, and 40 controls with subjective cognitive decline was analyzed using multiplex isobaric labeling. Spectral clustering was used to match MS/MS spectra...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29038946/cognitive-and-behavioral-disorders-in-parkinson-s-disease-an-update-ii-behavioral-disorders
#6
Luigi Trojano, Costanza Papagno
Patients with Parkinson's disease (PD) can experience several behavioral symptoms, such as apathy, agitation, hypersexuality, stereotypic movements, pathological gambling, abuse of antiparkinsonian drugs, and REM sleep behavioral disorders. Psychoses and hallucinations, depression and anxiety disorders, and difficulties in recognizing and experiencing emotions also impair behavior and can cause severe psychosocial problems in patients with PD. Symptoms can be present since early stages of the disease, sometimes even before the appearance of classical motor symptoms, likely in relation to dopamine depletion in basal ganglia and/or to dysfunctions of other neurotrasmitter systems, and others can develop later, in some cases in relation to dopaminergic treatment...
October 16, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29037500/motor-behavioural-and-cognitive-correlates-of-fatigue-in-early-de-novo-parkinson-disease-patients
#7
M Siciliano, L Trojano, R De Micco, A De Mase, F Garramone, A Russo, G Tedeschi, A Tessitore
INTRODUCTION: Fatigue is one of the most common and disabling non-motor symptoms in Parkinson's disease (PD). The objective of this study was to determine prevalence and motor, behavioural, and cognitive correlates of distressing fatigue in early, de novo PD patients. METHODS: Eighty-one consecutive de novo PD patients (64% men; mean age 65.73 ± 8.26 years) underwent a comprehensive examination, including Parkinson's disease Fatigue Scale (PFS), Epworth Sleepiness Scale (ESS), Parkinson's Disease Sleep Scale (PDSS), Beck Depression Inventory (BDI), Parkinson's Anxiety Scale (PAS), and Apathy Evaluation Scale (AES)...
October 9, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29037340/-neuropsychiatry-of-movement-disorders
#8
Juan Manuel Orjuela-Rojas, Gustavo Adolfo Barrios Vincos, Melisa Alejandra Martínez Gallego
Movement disorders can be defined as neurological syndromes presenting with excessive or diminished automatic or voluntary movements not related to weakness or spasticity. Both Parkinson's disease (PD) and Huntington's disease (HD) are well-known examples of these syndromes. The high prevalence of comorbid psychiatric symptoms like depression, anxiety, obsessive-compulsive symptoms, hallucinations, delusions, impulsivity, sleep disorders, apathy and cognitive impairment mean that these conditions must be regarded as neuropsychiatric diseases...
October 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/29033972/clinical-spectrum-risk-factors-and-behavioral-abnormalities-among-dementia-subtypes-in-a-north-indian-population-a-hospital-based-study
#9
Suman Kushwaha, Puneet Talwar, Aldrin Anthony, Meena Gupta, Kiran Bala, Rachna Agarwal, Vibha Sharma, Ritushree Kukreti
BACKGROUND: As variability in the clinical profile of dementia subtypes had been reported with regional differences across the world, we conducted a retrospective hospital-based study in a North Indian population. METHODS: We retrieved patient records from 2007 to 2014 for details of clinical evaluation, diagnosis, neuroimaging, biochemical investigations, and follow-up of 1,876 patients with dementia (PwD), and the data were analyzed using descriptive statistics...
May 2017: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/29028874/impaired-self-awareness-of-motor-disturbances-in-parkinson-s-disease
#10
Franziska Maier, George P Prigatano
Traditionally, anosognosia for cognitive or motor impairments in patients with Parkinson's disease (PD) was viewed as unlikely unless the patient was demented. More recent research has suggested that a portion of non-demented PD patients (30%-50%) in fact have impaired subjective awareness (ISA) of their motor impairments (ISAm). This empirical finding has implications for the clinical neuropsychological examination of PD patients and raises theoretical questions relevant to the broader study of anosognosia seen in other patient groups...
September 28, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29024046/traumatic-brain-injury-in-the-prodromal-period-of-parkinson-disease-a-large-epidemiological-study-using-medicare-data
#11
Alejandra Camacho-Soto, Mark N Warden, Susan Searles Nielsen, Amber Salter, David L Brody, Heidi Prather, Brad A Racette
OBJECTIVE: Studies suggest a greater risk of Parkinson disease (PD) after traumatic brain injury (TBI), but it is possible that the risk of TBI is greater in the prodromal period of PD. We aimed to examine the time-to-TBI in PD patients in their prodromal period compared to population-based controls. METHODS: We identified 89,790 incident PD cases and 118,095 comparable controls > 65 years of age in 2009 using Medicare claims data. Using data from the preceding five years, we compared time-to-TBI in PD patients in their prodromal period to controls...
October 10, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29021741/the-neuroprotective-role-of-protein-quality-control-in-halting-the-development-of-alpha-synuclein-pathology
#12
REVIEW
Destiny-Love Manecka, Benoît Vanderperre, Edward A Fon, Thomas M Durcan
Synucleinopathies are a family of neurodegenerative disorders that comprises Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy. Each of these disorders is characterized by devastating motor, cognitive, and autonomic consequences. Current treatments for synucleinopathies are not curative and are limited to improvement of quality of life for affected individuals. Although the underlying causes of these diseases are unknown, a shared pathological hallmark is the presence of proteinaceous inclusions containing the α-synuclein (α-syn) protein in brain tissue...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29021353/longitudinal-decline-of-driving-safety-in-parkinson-disease
#13
Ergun Y Uc, Matthew Rizzo, Amy M J O'Shea, Steven W Anderson, Jeffrey D Dawson
OBJECTIVE: To longitudinally assess and predict on-road driving safety in Parkinson disease (PD). METHODS: Drivers with PD (n = 67) and healthy controls (n = 110) drove a standardized route in an instrumented vehicle and were invited to return 2 years later. A professional driving expert reviewed drive data and videos to score safety errors. RESULTS: At baseline, drivers with PD performed worse on visual, cognitive, and motor tests, and committed more road safety errors compared to controls (median PD 38...
October 11, 2017: Neurology
https://www.readbyqxmd.com/read/29019160/the-role-of-cognitive-reserve-in-cognitive-aging-what-we-can-learn-from-parkinson-s-disease
#14
Nicoletta Ciccarelli, Maria Rita Lo Monaco, Domenico Fusco, Davide Liborio Vetrano, Giuseppe Zuccalà, Roberto Bernabei, Vincenzo Brandi, Maria Stella Pisciotta, Maria Caterina Silveri
Parkinson's disease (PD) typically occurs in elderly people and some degree of cognitive impairment is usually present. Cognitive reserve (CR) theory was proposed to explain the discrepancy between the degree of brain pathologies and clinical manifestations. We administered a comprehensive neuropsychological battery to 35 non-demented participants affected by PD. All participants underwent also the Cognitive Reserve Index questionnaire and the Brief Intelligence Test as proxies for CR. Relationships between CR and cognitive performance were investigated by linear regression analyses, adjusting for significant confounding factors...
October 11, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28994779/assessment-of-dopaminergic-homeostasis-in-mice-by-use-of-high-performance-liquid-chromatography-analysis-and-synaptosomal-dopamine-uptake
#15
Kathrine L Jensen, Annika H Runegaard, Pia Weikop, Ulrik Gether, Mattias Rickhag
Dopamine (DA) is a modulatory neurotransmitter controlling motor activity, reward processes and cognitive function. Impairment of dopaminergic (DAergic) neurotransmission is strongly associated with several central nervous system-associated diseases such as Parkinson's disease, attention-deficit-hyperactivity disorder and drug addiction(1)(,)(2)(,)(3)(,)(4). Delineating disease mechanisms involving DA imbalance is critically dependent on animal models to mimic aspects of the diseases, and thus protocols that assess specific parts of the DA homeostasis are important to provide novel insights and possible therapeutic targets for these diseases...
September 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28991675/sodium-butyrate-exerts-protective-effect-against-parkinson-s-disease-in-mice-via-stimulation-of-glucagon-like-peptide-1
#16
Jiaming Liu, Fangyan Wang, Suzhi Liu, Jimei Du, Xuezhen Hu, Jiaojiao Xiong, Renchi Fang, Wenqian Chen, Jing Sun
Sodium butyrate (NaB) has exhibited protective activity in neurological disorders. Here, we investigated the neuroprotective effect and potential mechanisms of NaB in a mouse model of Parkinson's disease (PD). A mouse was intraperitoneally treated with MPTP (30mg/kg) for 7 consecutive days to induce PD model and NaB (200mg/kg) was intragastrically treated for 3weeks. The behavioral tests were then conducted. Dopaminergic degeneration was evaluated by western blot and immunohistochemistry of tyrosine hydroxylase (TH) in the SN...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28991666/educational-attainment-and-motor-burden-in-advanced-parkinson-s-disease-the-emerging-role-of-education-in-motor-reserve
#17
Josefine Blume, Eva Rothenfusser, Jürgen Schlaier, Ulrich Bogdahn, Max Lange
OBJECTIVE: To explore the relationship of motor burden and educational attainment in patients with advanced stage PD. MATERIALS AND METHODS: We included 102 consecutive patients who underwent a complete evaluation for DBS surgery, including detailed neuropsychological testing and UPDRSIII in a standardized Levodopa challenge. Years of education (YoE) were calculated as the highest grade attained in secondary school plus years for post-secondary training. RESULTS: The OFF medication UPDRS-III score was associated with YoE (p=0...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28986235/alpha-synuclein-epigenetics-mitochondria-metabolism-calcium-traffic-circadian-dysfunction-in-parkinson-s-disease-an-integrated-strategy-for-management
#18
REVIEW
Oliver T Phillipson
The motor deficits which characterise the sporadic form of Parkinson's disease arise from age-related loss of a subset of dopamine neurons in the substantia nigra. Although motor symptoms respond to dopamine replacement therapies, the underlying disease process remains. This review details some features of the progressive molecular pathology and proposes deployment of a combination of nutrients: R-lipoic acid, acetyl-l-carnitine, ubiquinol, melatonin (or receptor agonists) and vitamin D3, with the collective potential to slow progression of these features...
October 3, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28985531/spatial-structure-normalises-working-memory-performance-in-parkinson-s-disease
#19
Sean J Fallon, Daniel Bor, Adam Hampshire, Roger A Barker, Adrian M Owen
Cognitive deficits are a frequent symptom of Parkinson's disease (PD), particularly in the domain of spatial working memory (WM). Despite numerous demonstrations of aberrant WM in patients, there is a lack of understanding about how, if at all, their WM is fundamentally altered. Most notably, it is unclear whether span - the yardstick upon which most WM models are built - is compromised by the disease. Moreover, it is also unknown whether WM deficits occur in all patients or only exist in a sub-group who are executively impaired...
September 1, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28984616/the-role-of-vitamin-d-in-disease-progression-in-early-parkinson-s-disease
#20
Isobel Sleeman, Terry Aspray, Rachael Lawson, Shirley Coleman, Gordon Duncan, Tien K Khoo, Inez Schoenmakers, Lynn Rochester, David Burn, Alison Yarnall
BACKGROUND: Previous cross-sectional studies have shown that Parkinson's disease (PD) patients have lower serum 25-hydroxy vitamin D (25(OH)D) concentrations than controls. Vitamin D deficiency was associated with increased disease severity and cognitive impairment in prevalent PD patients. OBJECTIVE: The aim of the study was to determine 25(OH)D in newly diagnosed PD and age-matched controls and to assess if there was an association with clinical outcomes (disease severity, cognition and falls) over the 36-month follow up period...
October 4, 2017: Journal of Parkinson's Disease
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