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Parkinson's Disease

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https://www.readbyqxmd.com/read/29333317/phosphorylated-%C3%AE-synuclein-copper-complex-formation-in-the-pathogenesis-of-parkinson-s-disease
#1
REVIEW
Juan Antonio Castillo-Gonzalez, Maria De Jesus Loera-Arias, Odila Saucedo-Cardenas, Roberto Montes-de-Oca-Luna, Aracely Garcia-Garcia, Humberto Rodriguez-Rocha
Parkinson's disease is the second most important neurodegenerative disorder worldwide. It is characterized by the presence of Lewy bodies, which are mainly composed of α-synuclein and ubiquitin-bound proteins. Both the ubiquitin proteasome system (UPS) and autophagy-lysosomal pathway (ALS) are altered in Parkinson's disease, leading to aggregation of proteins, particularly α-synuclein. Interestingly, it has been observed that copper promotes the protein aggregation process. Additionally, phosphorylation of α-synuclein along with copper also affects the protein aggregation process...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29333316/impact-of-m%C3%A3-zi%C3%A3-res-rehabilitative-method-in-patients-with-parkinson-s-disease-a-randomized-controlled-trial
#2
Teresa Paolucci, Federico Zangrando, Giulia Piccinini, Laura Deidda, Rossella Basile, Enrico Bruno, Emigen Buzi, Alice Mannocci, Franca Tirinelli, Shalom Haggiag, Ludovico Lispi, Ciro Villani, Vincenzo M Saraceni
The aim of this study was to assess the efficacy of Mézières method in improving trunk flexibility of the back muscles and balance in patients with Parkinson's disease (PD). Materials and Methods. Thirty-six patients were randomized into 2 groups: the Mézières treatment group and the control group (home exercise group). The primary outcome was the improvement in balance per the Berg Balance Scale (BBS) and the trunk flexibility of the back for the anterior flexion trunk test. Also, we evaluated pain, gait balance for the Functional Gait Assessment (FGA), disease-related disability for the Modified Parkinson's Activity Scale and the Unified Parkinson's Disease Rating Scale (UPDRS), the quality of life, and the functional exercise capacity...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29214093/should-skin-biopsies-be-performed-in-patients-suspected-of-having-parkinson-s-disease
#3
REVIEW
Timo Siepmann, Ana Isabel Penzlin, Ben Min-Woo Illigens, Heinz Reichmann
In patients with Parkinson's disease (PD), the molecularly misfolded form of α-synuclein was recently identified in cutaneous autonomic nerve fibers which displayed increased accumulation even in early disease stages. However, the underlying mechanisms of synucleinopathic nerve damage and its implication for brain pathology in later life remain to be elucidated. To date, specific diagnostic tools to evaluate small fiber pathology and to discriminate neurodegenerative proteinopathies are rare. Recently, research has indicated that deposition of α-synuclein in cutaneous nerve fibers quantified via immunohistochemistry in superficial skin biopsies might be a valid marker of PD which could facilitate early diagnosis and monitoring of disease progression...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29209554/genetic-analysis-of-lrrk2-r1628p-in-parkinson-s-disease-in-asian-populations
#4
REVIEW
Yuan Zhang, Qiying Sun, Minhan Yi, Xun Zhou, Jifeng Guo, Qian Xu, Beisha Tang, Xinxiang Yan
Although the etiology of Parkinson's disease (PD) remains unclear, there is increasing evidence of genetic factors contributing to the onset of PD. Various mutations and risk variants of the gene LRRK2 have been reported, but the association between LRRK2 R1628P and PD is still inconsistent. Thus, we conducted a meta-analysis to determine the potential relationship between R1628P and PD. Our study sample was an aggregate of 17 publications, which in total consisted of 9,275 PD patients and 8,114 controls. All of these articles are of high quality according to NOS, and there was no obvious reporting bias or heterogeneity...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29209553/antidyskinetic-treatment-with-mtep-affects-multiple-molecular-pathways-in-the-parkinsonian-striatum
#5
Jing-Ya Lin, Zhen-Guo Liu, Cheng-Long Xie, Lu Song, Ai-Juan Yan
Parkinson's disease is characterized by dopaminergic neuron loss and dopamine (DA) depletion in the striatum. Standard treatment is still focused on the restoration of dopamine with exogenous L-Dopa, which however causes L-Dopa-induced dyskinesia (LID). Several studies have shown that antagonism of the metabotropic glutamate receptor 5 alleviates LID, but the underlying mechanisms have remained unclear. We set out to determine where this alleviation may depend on restoring the equilibrium between the two main striatofugal pathways...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29158943/depression-in-parkinson-s-disease-the-contribution-from-animal-studies
#6
REVIEW
Jéssica Lopes Fontoura, Camila Baptista, Flávia de Brito Pedroso, José Augusto Pochapski, Edmar Miyoshi, Marcelo Machado Ferro
Besides being better known for causing motor impairments, Parkinson's disease (PD) can also cause many nonmotor symptoms, like depression and anxiety, which can cause significant loss of life quality and may not respond to regular drugs treatment. In this review, we discuss the depression in PD, based on data from studies in humans and rodents. Depression frequency seems higher in PD patients than in general population, despite high variation in data due to diagnosis disparities. Development of depression in PD seems more likely to be caused by the nigrostriatal pathway degeneration than as a consequence of the awareness of disease prognostic, and it seems to be related to dopaminergic, noradrenergic, and serotoninergic synapses deficits...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29158942/the-single-nucleotide-polymorphism-rs1014290-of-the-slc2a9-gene-is-associated-with-uric-acid-metabolism-in-parkinson-s-disease
#7
Jiangfang Miao, Jing Liu, Li Xiao, Jiedi Zheng, Chunfeng Liu, Zufu Zhu, Kai Li, Weifeng Luo
Individuals with Parkinson's disease (PD) have lower uric acid levels than those without PD, and the CC genotype and C minor allele of a single nucleotide polymorphism (SNP), rs1014290 of SLC2A9, are associated with lower uric acid levels. We investigated the association of rs1014290 with uric acid metabolism in a cohort of PD cases (220) and controls (110) in a Han Chinese population. Uric acid levels were determined and rs1014290 was assayed using a mutation-sensitive on/off switch technology. PD uric acid levels (291...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29147598/dbs-programming-an-evolving-approach-for-patients-with-parkinson-s-disease
#8
REVIEW
Aparna Wagle Shukla, Pam Zeilman, Hubert Fernandez, Jawad A Bajwa, Raja Mehanna
Deep brain stimulation (DBS) surgery is a well-established therapy for control of motor symptoms in Parkinson's disease. Despite an appropriate targeting and an accurate placement of DBS lead, a thorough and efficient programming is critical for a successful clinical outcome. DBS programming is a time consuming and laborious manual process. The current approach involves use of general guidelines involving determination of the lead type, electrode configuration, impedance check, and battery check. However there are no validated and well-established programming protocols...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29147597/psychometric-evaluation-of-the-parkinson-s-disease-activities-of-daily-living-scale
#9
Stina B Jonasson, Peter Hagell, Gun-Marie Hariz, Susanne Iwarsson, Maria H Nilsson
Objective: To evaluate a set of psychometric properties (i.e., data completeness, targeting, and external construct validity) of the Parkinson's disease Activities of Daily Living Scale (PADLS) in people with Parkinson's disease (PD). Specific attention was paid to the association between PADLS and PD severity, according to the Hoehn & Yahr (H&Y) staging. Methods: The sample included 251 persons with PD (mean age 70 [SD 9] years). Data collection comprised a self-administered postal survey, structured interviews, and clinical assessments at home visits...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29119036/technology-assisted-rehabilitation-of-writing-skills-in-parkinson-s-disease-visual-cueing-versus-intelligent-feedback
#10
Evelien Nackaerts, Alice Nieuwboer, Elisabetta Farella
Recent research showed that visual cueing can have both beneficial and detrimental effects on handwriting of patients with Parkinson's disease (PD) and healthy controls depending on the circumstances. Hence, using other sensory modalities to deliver cueing or feedback may be a valuable alternative. Therefore, the current study compared the effects of short-term training with either continuous visual cues or intermittent intelligent verbal feedback. Ten PD patients and nine healthy controls were randomly assigned to one of these training modes...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29104810/management-of-psychosis-in-parkinson-s-disease-emphasizing-clinical-subtypes-and-pathophysiological-mechanisms-of-the-condition
#11
REVIEW
Raquel N Taddei, Seyda Cankaya, Sandeep Dhaliwal, K Ray Chaudhuri
Investigation into neuropsychiatric symptoms in Parkinson's disease (PD) is sparse and current drug development is mainly focused on the motor aspect of PD. The tight association of psychosis with an impaired quality of life in PD, together with an important underreporting of this comorbid condition, contributes to its actual insufficient assessment and management. Furthermore, the withdrawal from access to readily available treatment interventions is unacceptable and has an impact on PD prognosis. Despite its impact, to date no standardized guidelines to the adequate management of PD psychosis are available and they are therefore highly needed...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29093980/the-importance-of-connection-to-others-in-qol-in-msa-and-psp
#12
Louise Wiblin, Rory Durcan, Mark Lee, Katie Brittain
Multiple System Atrophy (MSA) and Progressive Supranuclear Palsy (PSP) are atypical Parkinsonian disorders with extended morbidity and reduced lifespan, known to have marked and early impact upon quality of life (QoL). This study aimed to address the lack of studies in the literature regarding personal perspectives on QoL in MSA and PSP in both patients and carers. Participants took part in qualitative, in-depth interviews in the North East of England, exploring what impacts their QoL and their experiences of living with these complex conditions...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29090105/the-outcomes-of-total-hip-replacement-in-patients-with-parkinson-s-disease-comparison-of-the-elective-and-hip-fracture-groups
#13
Pavel Šponer, Tomáš Kučera, Michal Grinac, Aleš Bezrouk, Daniel Waciakowski
INTRODUCTION: The aim of the study was to compare the clinical outcomes following elective and traumatic total hip arthroplasty in Parkinson's disease patients. MATERIALS AND METHODS: Ten patients with osteoarthritis comprise the elective group (mean age at operation 74 years; mean follow-up 82 months). Thirteen patients with femoral fracture comprise the hip fracture group (mean age 76 years; mean follow-up 54 months). All patients were followed up at 6 and 36 months postoperatively and at the time of the latest follow-up...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/29075547/can-a-smartphone-diagnose-parkinson-disease-a-deep-neural-network-method-and-telediagnosis-system-implementation
#14
Y N Zhang
Parkinson's disease (PD) is primarily diagnosed by clinical examinations, such as walking test, handwriting test, and MRI diagnostic. In this paper, we propose a machine learning based PD telediagnosis method for smartphone. Classification of PD using speech records is a challenging task owing to the fact that the classification accuracy is still lower than doctor-level. Here we demonstrate automatic classification of PD using time frequency features, stacked autoencoders (SAE), and K nearest neighbor (KNN) classifier...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28951797/earlier-intervention-with-deep-brain-stimulation-for-parkinson-s-disease
#15
REVIEW
Gerson Suarez-Cedeno, Jessika Suescun, Mya C Schiess
Neuromodulation of subcortical areas of the brain as therapy to reduce Parkinsonian motor symptoms was developed in the mid-twentieth century and went through many technical and scientific advances that established specific targets and stimulation parameters. Deep Brain Stimulation (DBS) was approved by the FDA in 2002 as neuromodulation therapy for advanced Parkinson's disease, prompting several randomized controlled trials that confirmed its safety and effectiveness. The implantation of tens of thousands of patients in North America and Europe ignited research into its potential role in early disease stages and the therapeutic benefit of DBS compared to best medical therapy...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28913005/chaperone-based-therapies-for-disease-modification-in-parkinson-s-disease
#16
REVIEW
Erik L Friesen, Mitch L De Snoo, Luckshi Rajendran, Lorraine V Kalia, Suneil K Kalia
Parkinson's disease (PD) is the second most common neurodegenerative disorder and is characterized by the presence of pathological intracellular aggregates primarily composed of misfolded α-synuclein. This pathology implicates the molecular machinery responsible for maintaining protein homeostasis (proteostasis), including molecular chaperones, in the pathobiology of the disease. There is mounting evidence from preclinical and clinical studies that various molecular chaperones are downregulated, sequestered, depleted, or dysfunctional in PD...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28894620/programming-for-stimulation-induced-transient-nonmotor-psychiatric-symptoms-after-bilateral-subthalamic-nucleus-deep-brain-stimulation-for-parkinson-s-disease
#17
Xi Wu, Yiqing Qiu, Keith Simfukwe, Jiali Wang, Jianchun Chen, Xiaowu Hu
BACKGROUND: Stimulation-induced transient nonmotor psychiatric symptoms (STPSs) are side effects following bilateral subthalamic nucleus deep brain stimulation (STN-DBS) in Parkinson's disease (PD) patients. We designed algorithms which (1) determine the electrode contacts that induce STPSs and (2) provide a programming protocol to eliminate STPS and maintain the optimal motor functions. Our objective is to test the effectiveness of these algorithms. MATERIALS AND METHODS: 454 PD patients who underwent programming sessions after STN-DBS implantations were retrospectively analyzed...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28884038/differential-diagnosis-of-parkinson-disease-essential-tremor-and-enhanced-physiological-tremor-with-the-tremor-analysis-of-emg
#18
Jie Zhang, Yan Xing, Xiuli Ma, Liqun Feng
We investigate the differential diagnostic value of tremor analysis of EMG on Parkinson's disease (PD), essential tremor (ET), and enhanced physiological tremor (EPT). Clinical data from 25 patients with PD, 20 patients with ET, and 20 patients with EPT were collected. The tremor frequency and muscle contraction pattern of the resting, posture, and 500 g and 1000 g overload were recorded. The frequency of PD tremor was 4-6 Hz, and the frequency of ET was also in this range; the frequency of EPT is 6-12 hz having some overlap with PD...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28852579/predictors-of-functional-and-quality-of-life-outcomes-following-deep-brain-stimulation-surgery-in-parkinson-s-disease-patients-disease-patient-and-surgical-factors
#19
Hesham Abboud, Gencer Genc, Nicolas R Thompson, Srivadee Oravivattanakul, Faisal Alsallom, Dennys Reyes, Kathy Wilson, Russell Cerejo, Xin Xin Yu, Darlene Floden, Anwar Ahmed, Michal Gostkowski, Ayman Ezzeldin, Hazem Marouf, Ossama Y Mansour, Andre Machado, Hubert H Fernandez
OBJECTIVE: The primary objective was to evaluate predictors of quality of life (QOL) and functional outcomes following deep brain stimulation (DBS) in Parkinson's disease (PD) patients. The secondary objective was to identify predictors of global improvement. METHODS: PD patients who underwent DBS at our Center from 2006 to 2011 were evaluated by chart review and email/phone survey. Postoperative UPDRS II and EQ-5D were analyzed using simple linear regression adjusting for preoperative score...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28848685/bridging-the-gaps-in-patient-education-for-dbs-surgery-in-parkinson-s-disease
#20
Colleen D Knoop, Robert Kadish, Kathy Hager, Michael C Park, Paul D Loprinzi, Kathrin LaFaver
INTRODUCTION: Improvements in quality of life, tremor, and other motor features have been recognized as superior in patients with advanced Parkinson's disease (PD) treated with deep brain stimulation (DBS) surgery versus best medical therapy. We studied a group of patients with PD after undergoing DBS surgery in regard to expectations and satisfaction with DBS outcomes to determine gaps in patient education. METHODS: This study was a retrospective, single academic center chart review and outcome questionnaire sent to patients with PD who had undergone DBS surgery between 2007 and 2014...
2017: Parkinson's Disease
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