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https://www.readbyqxmd.com/read/29463406/chlorpyrifos-induced-parkinsonian-model-in-mice-behavior-histopathology-and-biochemistry
#1
Haci Ahmet Deveci, Mahmut Karapehlivan
INTRODUCTION: The aim of this study was to investigate the protective effect of caffeic acid phenethyl ester (CAPE) on Paraoxonase (PON1) activity, and levels of lipid profile, total sialic acid (TSA), total antioxidant capacity (TAC) and total oxidant capacity (TOC) in the plasma and brain tissue of mice with chlorpyrifos-ethyl (CPF)-induced Parkinson. MATERIAL AND METHOD: In the study, 35 male Swiss albino mice were divided into 5 groups including equal number of mice as follows; intraperitoneal injection of saline for mice in control (C) group, subcutaneous injection of 80mg/kg CPF for CPF group, intraperitoneal injection of 10μmol/kg CAPE for CAPE group, subcutaneous injection of 80mg/kg CPF and intraperitoneal injection of 10μmol/kg CAPE for CPF+CAPE group and intraperitoneal injection of 10% ethanol diluted in physiological saline solution for 21days for ethanol (E) group...
January 2018: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29460300/catheter-associated-venous-air-embolism-in-hospitalized-horses-32-cases
#2
Nicholas J Parkinson, Harold C McKenzie, Michelle H Barton, Jennifer L Davis, Bettina Dunkel, Amy L Johnson, Elizabeth S MacDonald
BACKGROUND: Venous air embolism is a potentially life-threatening complication of IV catheter use in horses. Despite widespread anecdotal reports of their occurrence, few cases have been reported in the literature and the prognosis is currently unknown. HYPOTHESIS/OBJECTIVES: Our objective was to describe the surrounding circumstances, clinical signs, treatment, progression, and outcome of venous air embolism in hospitalized horses. ANIMALS: Thirty-two horses with acute onset of compatible clinical signs associated with IV catheter disconnection or damage...
February 20, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29460114/peripheral-administration-of-tetanus-toxin-hc-fragment-prevents-mpp-toxicity-in-vivo
#3
Natalia Moreno-Galarza, Liliana Mendieta, Victoria Palafox-Sánchez, Mireia Herrando-Grabulosa, Carles Gil, Daniel I Limón, José Aguilera
Several studies have shown that intrastriatal application of 1-methyl-4-phenylpyridinium (MPP+ ) produces similar biochemical changes in rat to those seen in Parkinson's disease (PD), such as dopaminergic terminal degeneration and consequent appearance of motor deficits, making the MPP+ lesion a widely used model of parkinsonism in rodents. Previous results from our group have shown a neuroprotective effect of the carboxyl-terminal domain of the heavy chain of tetanus toxin (Hc-TeTx) under different types of stress...
February 19, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29459065/assesssing-an-unmet-healthcare-demand-a-survey-of-immunisation-among-homecare-patients-and-their-caregivers
#4
Süleyman Görpelioğlu, Canan Emiroğlu, Özlem Suvak, Cenk Aypak, Derya Akbıyık
Susceptibility of the homecare patient to vaccine preventable infections and their complications is high. Hospitalization of this patient group increases costs to the healthcare system. Therefore vaccination services are of great importance for protecting these patients from complications and hospitalization. We aimed to determine vaccination status of the patients receiving home care services from a tertiary hospital in Turkey and to reveal their vaccination needs. This cross sectional study was carried out in the Division of Home Care Services of Dışkapı Yıldırım Beyazıt Training and Research Hospital in Ankara Turkey...
February 16, 2018: Vaccine
https://www.readbyqxmd.com/read/29458117/agomelatine-s-effect-on-circadian-locomotor-rhythm-alteration-and-depressive-like-behavior-in-6-ohda-lesioned-rats
#5
Leonardo C Souza, Bruno J Martynhak, Taysa B Bassani, Joelle de M Turnes, Meira M Machado, Eric Moura, Roberto Andreatini, Maria A B F Vital
Parkinson's disease (PD) patients often suffer from circadian locomotor rhythms impairment and depression, important non-motor symptoms. It is known that toxin-based animal models of PD can reproduce these features. In a 6-hydroxydopamine (6-OHDA) intranigral model, we first investigated the possible disturbances on circadian rhythms of locomotor activity. The rats were divided into 6-OHDA and Sham groups. After a partial dopaminergic lesion, the 6-OHDA group showed slight alterations in different circadian locomotor rhythms parameters...
February 16, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29452610/the-plasma-membrane-calcium-pumps-the-old-and-the-new
#6
REVIEW
Asma Zaidi, Mercy Adewale, Lauren McLean, Paul Ramlow
The plasma membrane Ca 2+ -ATPase (PMCA) pumps play a critical role in the maintenance of calcium (Ca 2+ ) homeostasis, crucial for optimal neuronal function and cell survival. Loss of Ca 2+ homeostasis is a key precursor in neuronal dysfunction associated with brain aging and in the pathogenesis of neurodegenerative disorders. In this article, we review evidence showing age-related changes in the PMCAs in synaptic plasma membranes (SPMs) and lipid raft microdomains isolated from rat brain. Both PMCA activity and protein levels decline progressively with increasing age...
January 10, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29451381/from-a-highly-disordered-to-a-metastable-state-uncovering-insights-of-%C3%AE-synuclein
#7
Yoann Cote, Patrice Delarue, Harold Abraham Scheraga, Patrick Senet, Gia G Maisuradze
α-synuclein (αS) is a major constituent of Lewy bodies, the insoluble aggregates that are the hallmark of one of the most prevalent neurodegenerative disorders - Parkinson's disease (PD). The vast majority of experiments in vitro and in vivo provide extensive evidence that a disordered monomeric form is the predominant state of αS in water solution, and it undergoes a large-scale disorder-to-helix transition upon binding to vesicles of different types. Recently, another form, tetrameric, of αS with a stable helical structure was identified experimentally...
February 16, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29447051/targeting-crosstalk-between-nuclear-factor-erythroid-derived-2-like-2-and-nuclear-factor-kappa-beta-pathway-by-nrf2-activator-dimethyl-fumarate-in-epileptogenesis
#8
Neha Singh, Sheekha Vijayanti, Lekha Saha
Epilepsy is a complex, chronic neurological disorder characterized by increased and abnormal synchronization of neuronal electrical activity, which is manifested as seizures. It is associated with many comorbid conditions such as depression, anxiety, sleep disorder, psychiatric disorder etc. which consequently causes higher mortality rate. The understanding of its cellular and molecular mechanism is partial, because of which it remains an ongoing health problem, despite the increasing availability of newer antiepileptic drugs...
February 15, 2018: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29446158/a-neuroscience-perspective-of-the-gut-theory-of-parkinson-s-disease
#9
Lisa M Smith, Louise C Parr-Brownlie
Parkinson's disease is caused by complex interactions between environmental factors and a genetic predisposition. Environmental factors include exposure to pesticides and toxins, heavy metals and accumulation of iron and/or manganese in the brain. However, accumulating evidence indicates that gut-brain health and function is impaired in Parkinson's disease, often a decade before motor symptoms are diagnosed. We present the gut-brain theory of Parkinson's disease and summarise the peripheral and central nervous system pathology, gastrointestinal symptoms experienced by many Parkinson's patients, the route by which gut-brain dysfunction may occur, and changes in gut microbiota that are associated with disease expression...
February 15, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29444973/eight-hours-adaptive-deep-brain-stimulation-in-patients-with-parkinson-disease
#10
Mattia Arlotti, Sara Marceglia, Guglielmo Foffani, Jens Volkmann, Andres M Lozano, Elena Moro, Filippo Cogiamanian, Marco Prenassi, Tommaso Bocci, Francesca Cortese, Paolo Rampini, Sergio Barbieri, Alberto Priori
OBJECTIVES: To assess the feasibility and clinical efficacy of local field potentials (LFPs)-based adaptive deep brain stimulation (aDBS) in patients with advanced Parkinson disease (PD) during daily activities in an open-label, nonblinded study. METHODS: We monitored neurophysiologic and clinical fluctuations during 2 perioperative experimental sessions lasting for up to 8 hours. On the first day, the patient took his/her daily medication, while on the second, he/she additionally underwent subthalamic nucleus aDBS driven by LFPs beta band power...
February 14, 2018: Neurology
https://www.readbyqxmd.com/read/29442498/proteostasis-and-the-regulation-of-intra-and-extracellular-protein-aggregation-by-atp-independent-molecular-chaperones-lens-%C3%AE-crystallins-and-milk-caseins
#11
John A Carver, Heath Ecroyd, Roger J W Truscott, David C Thorn, Carl Holt
Molecular chaperone proteins perform a diversity of roles inside and outside the cell. One of the most important is the stabilization of misfolding proteins to prevent their aggregation, a process that is potentially detrimental to cell viability. Diseases such as Alzheimer's, Parkinson's, and cataract are characterized by the accumulation of protein aggregates. In vivo, many proteins are metastable and therefore under mild destabilizing conditions have an inherent tendency to misfold, aggregate, and hence lose functionality...
February 14, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29439518/the-neuroprotective-effects-of-cinnamic-aldehyde-in-an-mptp-mouse-model-of-parkinson-s-disease
#12
Woom-Yee Bae, Jae-Sun Choi, Joo-Won Jeong
Cinnamic aldehyde (CA), a key flavor compound in cinnamon essential oil, has been identified as an anti-oxidant, anti-angiogenic, and anti-inflammatory material. Recently, the neuroprotective effects of CA have been reported in various neurodegenerative disorders, including Parkinson's disease (PD). In neurons, autophagy is tightly regulated, and consequently, the dysregulation of autophagy may induce neurodegenerative disorders. In the present study, we found that the selective dopaminergic neuronal death in the substantia nigra of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse models was prevented by CA...
February 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29435803/rifampicin-prevents-sh-sy5y-cells-from-rotenone-induced-apoptosis-via-the-pi3k-akt-gsk-3%C3%AE-creb-signaling-pathway
#13
Xia Wu, Yanran Liang, Xiuna Jing, Danyu Lin, Ying Chen, Tianen Zhou, Sudan Peng, Dezhi Zheng, Zhifen Zeng, Ming Lei, Kaixun Huang, Enxiang Tao
In addition to its original application for treating tuberculosis, rifampicin has multiple potential neuroprotective effects in chronic neurodegenerative diseases including Parkinson's disease (PD) and Alzheimer's disease. Inflammatory reactions and the PI3K/Akt pathway are strongly implicated in dopaminergic neuronal death in PD. This study aims to investigate whether rifampicin protects rotenone-lesioned SH-SY5Y cells via regulating PI3K/Akt/GSK-3β/CREB pathway. Rotenone-treated SH-SY5Y cells were used as the cell model to investigate the neuroprotective effects of rifampicin...
February 12, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29434188/dopamine-d2-receptor-mediated-neuroprotection-in-a-g2019s-lrrk2-genetic-model-of-parkinson-s-disease
#14
Alessandro Tozzi, Michela Tantucci, Saverio Marchi, Petra Mazzocchetti, Michele Morari, Paolo Pinton, Andrea Mancini, Paolo Calabresi
Parkinson's disease (PD) is a neurodegenerative disorder in which genetic and environmental factors synergistically lead to loss of midbrain dopamine (DA) neurons. Mutation of leucine-rich repeated kinase2 (Lrrk2) genes is responsible for the majority of inherited familial cases of PD and can also be found in sporadic cases. The pathophysiological role of this kinase has to be fully understood yet. Hyperactivation of Lrrk2 kinase domain might represent a predisposing factor for both enhanced striatal glutamatergic release and mitochondrial vulnerability to environmental factors that are observed in PD...
February 12, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29433734/foxo-in-neural-cells-and-diseases-of-the-nervous-system
#15
Evan E Santo, Jihye Paik
The evolutionarily conserved FOXO family of transcription factors has emerged as a significant arbiter of neural cell fate and function in mammals. From the neural stem cell (NSC) state through mature neurons under both physiological and pathological conditions, they have been found to modulate neural cell survival, stress responses, lineage commitment, and neuronal signaling. Lineage-specific FOXO knockout mice have provided an invaluable tool for the dissection of FOXO biology in the nervous system. Within the NSC compartments of the brain, FOXOs are required for the maintenance of NSC quiescence and for the clearance of reactive oxygen species...
2018: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/29433359/piperlongumine-restores-the-balance-of-autophagy-and-apoptosis-by-increasing-bcl2-phosphorylation-in-rotenone-induced-parkinson-disease-models
#16
Jia Liu, Weijin Liu, Yongquan Lu, Hao Tian, Chunli Duan, Lingling Lu, Ge Gao, Xia Wu, Xiaomin Wang, Hui Yang
Parkinson disease (PD) is the second most common neurodegenerative disorder after Alzheimer disease and is caused by genetics, environmental factors and aging, with few treatments currently available. Apoptosis and macroautophagy/autophagy play critical roles in PD pathogenesis; as such, modulating their balance is a potential treatment strategy. BCL2 (B cell leukemia/lymphoma 2) is a key molecule regulating this balance. Piperlongumine (PLG) is an alkaloid extracted from Piper longum L. that has anti-inflammatory and anticancer effects...
February 13, 2018: Autophagy
https://www.readbyqxmd.com/read/29429622/step-length-determines-minimum-toe-clearance-in-older-adults-and-people-with-parkinson-s-disease
#17
Lisa Alcock, Brook Galna, Ruth Perkins, Sue Lord, Lynn Rochester
Reduced foot clearance when walking may increase the risk of trips and falls in people with Parkinson's disease (PD). Changes in foot clearance in people with PD are likely to be associated with temporal-spatial characteristics of gait such as walking slowly which evokes alterations in the temporal-spatial control of stepping patterns. Enhancing our understanding of the temporal-spatial determinants of foot clearance may inform the design of falls prevention therapies. Thirty-six people with PD and 38 age-matched controls completed four intermittent walks under two conditions: self-selected and fast gait velocity...
December 13, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29428995/dyskinesias-and-levodopa-therapy-why-wait
#18
REVIEW
Michele Matarazzo, Alexandra Perez-Soriano, A Jon Stoessl
Throughout the years there has been a longstanding discussion on whether levodopa therapy in Parkinson's disease should be started in early vs. later stages, in order to prevent or delay motor complications such as fluctuations and dyskinesias. This controversial topic has been extensively debated for decades, and the prevailing view today is that levodopa should not be postponed. However, there is still fear associated with its use in early stages, especially in younger patients, who are more prone to develop dyskinesias...
February 10, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29420861/do-subjects-with-minimal-motor-features-have-prodromal-pd
#19
Yaping Chu, Aron S Buchman, C W Olanow, Jeffrey H Kordower
BACKGROUND: Understanding the pathological changes underlying mild motor features of the eldery and defining a patient population with prodromal Parkinson's disease (PD) are of great clinical importance. It remains unclear, however, how to accurately and specifically diagnose prodromal PD. We examined whether older adults with minimal parkinsonian motor features have nigrostriatal degeneration and α-synuclein pathology consistent with prodromal PD. METHODS: Brain sections were obtained from older adults with a clinical diagnosis of PD (N=21) and without a clinical diagnosis of PD (N=27) who underwent motor examination proximate to death...
February 8, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29418047/the-role-of-mitochondria-in-the-female-germline-implications-to-fertility-and-inheritance-of-mitochondrial-diseases
#20
REVIEW
Marcos Roberto Chiaratti, Bruna Martins Garcia, Karen Freire Carvalho, Thiago Simões Machado, Fernanda Karina Silva da Ribeiro, Carolina Habermann Macabelli
Mitochondria play a fundamental role during development of the female germline. They are fragmented, round and small. Despite these characteristics suggesting that they are inactive, there is accumulating evidence that mitochondrial dysfunctions are a major cause of infertility and generation of aneuploidies in humans. In addition, mitochondria and their own genomes (mitochondrial DNA - mtDNA) may become damaged with time, which might be one reason why aging leads to infertility. As a result, mitochondria have been proposed as an important target for evaluating oocyte and embryo quality, and developing treatments for female infertility...
February 8, 2018: Cell Biology International
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