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https://www.readbyqxmd.com/read/29030221/inhibition-of-bdnf-production-by-mpp-through-up-regulation-of-mir-210-3p-contributes-to-dopaminergic-neuron-damage-in-mptp-model
#1
Shan Zhang, Shu Chen, Anmin Liu, Jungang Wan, Lingwen Tang, Niandong Zheng, Yi Xiong
The neurotrophin brain-derived neurotrophic factor (BDNF) has been involved in supporting of neuron survival. The observation of reduced level of BDNF in the substantia nigra (SN) of Parkinson's disease (PD) patients suggests its important role in neuron protection in PD pathogenesis. However, the mechanism underlying the down-regulation of BDNF in PD was largely unknown. In this study, we found that miR-210-3p is involved in the regulation of BDNF production by 1-methyl-4-phenylpyridinium (MPP(+)). MPP(+) inhibits the BDNF production in SH-SY5Y cells through a transcription independent manner...
October 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29030185/inhibitory-effect-of-tartrate-against-phosphate-induced-dj-1-aggregation
#2
Min Soo Kim, Sangmin Lee, Sanguk Yun, Pann-Ghill Suh, Jongmi Park, Minghua Cui, Sun Choi, Sun-Shin Cha, Wook Jin
The DJ-1 protein engages in diverse cellular and pathological processes, including tumorigenesis, apoptosis, sperm fertilization, and the progression of Parkinson's disease (PD). The functional dimeric form of DJ-1 transforms into non-functional filamentous aggregates in an inorganic phosphate (Pi)-dependent manner in vitro. Here, we demonstrated that Pi and reactive oxygen species (ROS) induce DJ-1 aggregation in Neuro2A and SH-SY5Y cells. Remarkably, tartrate treatment significantly reduced Pi- and ROS-induced DJ-1 aggregation and restored Pi- and ROS-provoked cell death using quantitative data as mean±standard deviation, and statistics...
October 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29029571/encoding-strategy-training-and-self-reported-everyday-prospective-memory-in-people-with-parkinson-disease-a-randomized-controlled-trial
#3
Susan Goedeken, Cathryne Potempa, Eliza M Prager, Erin R Foster
Objective To compare the effects of laboratory-based training in implementation intentions (II; experimental strategy) and verbal rehearsal (VR; control strategy) on self-reported everyday prospective memory among people with Parkinson disease (PD) and to investigate potential correlates of change in self-reported everyday prospective memory in response to this training. Method This was a randomized-controlled trial. Participants with mild to moderate PD without dementia underwent one session of training in either II (n = 25) or VR (n = 27)...
October 13, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/29027056/curcumin-affords-neuroprotection-and-inhibits-%C3%AE-synuclein-aggregation-in-lipopolysaccharide-induced-parkinson-s-disease-model
#4
Neha Sharma, Bimla Nehru
Parkinson's disease (PD) pathology is characterized by the abnormal accumulation and aggregation of the pre-synaptic protein α-synuclein in the dopaminergic neurons as Lewy bodies (LBs). Curcumin, which plays a neuroprotective role in various animal models of PD, was found to directly modulate the aggregation of α-synuclein in in vitro as well as in in vivo studies. While curcumin has been shown to exhibit strong anti-oxidant and anti-inflammatory properties, there are a number of other possible mechanisms by which curcumin may alter α-synuclein aggregation which still remains obscure...
October 12, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/29021837/the-bssg-rat-model-of-parkinson-s-disease-progressing-towards-a-valid-predictive-model-of-disease
#5
REVIEW
Jackalina M Van Kampen, Harold A Robertson
ABSTRACT: Parkinson's disease (PD) is a neurodegenerative disorder, classically considered a movement disorder. A great deal is known about the anatomical connections and neuropathology and pharmacological changes of PD, as they relate to the loss of dopaminergic function and the appearance of cardinal motor symptoms. Our understanding of the role of dopamine in PD has led to the development of effective pharmacological treatments of the motor symptoms in the form of dopamine replacement therapy using levodopa and dopaminergic agonists...
September 2017: EPMA Journal
https://www.readbyqxmd.com/read/29018160/dopamine-dysregulation-syndrome-in-parkinson-s-disease-a-systematic-review-of-published-cases
#6
Nicola Warren, Cullen O'Gorman, Alexander Lehn, Dan Siskind
OBJECTIVES: Dopamine dysregulation syndrome (DDS) is an uncommon complication of the treatment of Parkinson's disease, characterised by addictive behaviour and excessive use of dopaminergic medication. DDS may frequently go unrecognised or misdiagnosed. We aimed to clarify current understanding of presentation, risk factors, comorbidities and management of DDS. METHODS: Case reports were identified through a systematic search of databases (PubMed, Embase) with the following terms: dopaminergic dysregulation syndrome, hedonistic homeostatic dysregulation, dopamine/levodopa addiction...
October 10, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29017893/chronic-inflammation-inflammaging-in-the-ageing-cochlea-a-novel-target-for-future-presbycusis-therapy
#7
Nathan Watson, Bo Ding, Xiaoxia Zhu, Robert D Frisina
Chronic, low-grade inflammation, or inflammaging, is a crucial contributor to various age-related pathologies and natural processes in aging tissue, including the nervous system. Over the past two decades, much effort has been done to understand the mechanisms of inflammaging in disease models such as type II diabetes, cardiovascular disease, Alzheimer's disease, Parkinson's disease, and others. However, despite being the most prevalent neurodegenerative disorder, the number one communication disorder, and one of the top three chronic medical conditions of our aged population; little research has been conducted on the potential role of inflammation in age-related hearing loss (ARHL)...
October 7, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28991675/sodium-butyrate-exerts-protective-effect-against-parkinson-s-disease-in-mice-via-stimulation-of-glucagon-like-peptide-1
#8
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/28990084/neuroprotective-effect-of-chondroitin-sulfate-on-sh%C3%A2-sy5y-cells-overexpressing-wild%C3%A2-type-or-a53t-mutant-%C3%AE-%C3%A2-synuclein
#9
Chuanxia Ju, Jianjun Gao, Lin Hou, Lei Wang, Fang Zhang, Fusheng Sun, Tingting Zhang, Pingping Xu, Zhenyan Shi, Fang Hu, Congxiao Zhang
Accumulation of α‑synuclein (α‑SYN) is a common pathology for Parkinson's disease (PD). There is abundant evidence that the toxic‑gain‑of‑function of α‑SYN's is associated with aggregation and consequent effects. To assess the potential of chondroitin sulfate (CS) in this regard, the present study investigated its neuroprotective on SH‑SY5Y cells overexpressing wild‑type (WT) or A53T mutant α‑SYN. Cell viability was measured by MTT assay. Apoptosis, reactive oxygen species (ROS) and mitochondrial membrane potential were detected by flow cytometry...
October 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28986199/vascular-parkinsonism-in-a-tertiary-care-stroke-prevention-clinic-and-the-development-of-a-new-screening-strategy
#10
Herbert A Manosalva, Fabricio Pio, Thomas Jeerakathil, Maher Saqqur, Richard Camicioli, Oksana Suchowersky
OBJECTIVES: To determine the prevalence of vascular parkinsonism (VasP) in a stroke prevention clinic (SPC). BACKGROUND: VasP can be defined by an onset of parkinsonism with prominent gait problems occurring within 1 year of stroke. METHODS: We created a screening strategy based on the Tanner Questionnaire (TQ), a validated scale for parkinsonism, and the creation of a 4-point Five-Minute Assessment Scale (FMAS) operationalizing Zijlmans' criteria for the diagnosis of VasP...
October 3, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28986122/mitochondrial-ros-mediated-post-transcriptional-regulation-of-%C3%AE-synuclein-through-mir-7-and-mir-153
#11
Goun Je, Yoon-Seong Kim
Dysregulation of human alpha-synuclein (α-SYN) is one of the major contributors in the pathogenesis of Parkinson's disease. 1-methyl-4-phenylpyridinium (MPP(+)) is well known neurotoxin which increases α-SYN expression and causes dopaminergic neuronal death. Increasing evidence suggests microRNAs (miRNAs), especially miRNA-7 and miR-153, have important role in the regulation of α-SYN translation and they can prevent MPP(+)-mediated neuronal death. Here, we examined whether MPP(+)-mediated upregulation of α-SYN expression is directly related to miRNA-7 and miR-153...
October 3, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28982631/effect-of-the-5%C3%AE-reductase-enzyme-inhibitor-dutasteride-in-the-brain-of-intact-and-parkinsonian-mice
#12
Nadhir Litim, Marc Morissette, Donatella Caruso, Roberto C Melcangi, Thérèse Di Paolo
Dutasteride is a 5alpha-reductase inhibitor in clinical use to treat endocrine conditions. The present study investigated the neuroprotective mechanisms of action of dutasteride in intact and 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned mice using a low dose of MPTP not affecting motor activity modeling early stages of Parkinson's disease (PD). We hypothesized that dutasteride neuroprotection is due to altered steroids levels. Dutasteride pre-treatment prevented loss of striatal dopamine (DA) and its metabolite DOPAC...
October 2, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28980404/preventive-and-therapeutic-potential-of-ascorbic-acid-in-neurodegenerative-diseases
#13
REVIEW
Morgana Moretti, Daiane Bittencourt Fraga, Ana Lúcia S Rodrigues
In this review, we summarize the involvement of ascorbic acid in neurodegenerative diseases by presenting available evidence on the behavioral and biochemical effects of this compound in animal models of neurodegeneration as well as the use of ascorbic acid as a therapeutic approach to alleviate neurodegenerative progression in clinical studies. Ascorbate, a reduced form of vitamin C, has gained interest for its multiple functions and mechanisms of action, contributing to the homeostasis of normal tissues and organs as well as to tissue regeneration...
October 4, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28973664/lrrk2-g2019s-induced-mitochondrial-dna-damage-is-lrrk2-kinase-dependent-and-inhibition-restores-mtdna-integrity-in-parkinson-s-disease
#14
Evan H Howlett, Nicholas Jensen, Frances Belmonte, Faria Zafar, Xiaoping Hu, Jillian Kluss, Birgitt Schüle, Brett A Kaufman, J Timothy Greenamyre, Laurie H Sanders
Mutations in leucine-rich repeat kinase 2 (LRRK2) are associated with increased risk for developing Parkinson's disease (PD). Previously we found that LRRK2 G2019S mutation carriers have increased mitochondrial DNA (mtDNA) damage and after zinc finger nuclease-mediated gene mutation correction, mtDNA damage was no longer detectable. While the mtDNA damage phenotype can be unambiguously attributed to the LRRK2 G2019S mutation, the underlying mechanism(s) is unknown. Here, we examine the role of LRRK2 kinase function in LRRK2 G2019S-mediated mtDNA damage, using both genetic and pharmacological approaches in cultured neurons and PD patient-derived cells...
August 14, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28970800/the-mechanisms-of-traditional-chinese-medicine-underlying-the-prevention-and-treatment-of-parkinson-s-disease
#15
REVIEW
Xiaoliang Li, YaNan Zhang, Yu Wang, Jing Xu, Ping Xin, YongHai Meng, Qiuhong Wang, Haixue Kuang
Parkinson's disease (PD), characterized with bradykinesia, static tremor, rigidity and disturbances in balance, is the second most common neurodegenerative disorder. Along with the largely aging population in the world, the incidence is increasing year by year, which imposes the negative impacts on patients, their families and the whole society. Traditional Chinese medicine (TCM) has a positive prospect for the prevention and cure of PD due to its advantages of less side effects and multi-target effects. At present, the pathogenesis of PD is not yet fully discovered...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28969943/deciphering-the-pathways-that-protect-from-il-13-mediated-potentiation-of-oxidative-stress-induced-dopaminergic-nerve-cell-death
#16
Pamela Maher, Bruno Conti
The majority of Parkinson's disease (PD) cases are sporadic with only about 10% of PD patients having a family history of the disease suggesting that this neurodegenerative disorder is the result of both environmental and genetic factors. Both oxidative stress and neuroinflammation are thought to contribute to PD. Previously, we showed that the activation of interleukin 13 receptor alpha 1 (IL-13Rα1) increases the sensitivity of dopaminergic neurons to oxidative damage both in cultured cells and in animals...
September 30, 2017: Cytokine
https://www.readbyqxmd.com/read/28965171/targeting-of-disordered-proteins-by-small-molecules-in-neurodegenerative-diseases
#17
Francesca Longhena, PierFranco Spano, Arianna Bellucci
The formation of protein aggregates and inclusions in the brain and spinal cord is a common neuropathological feature of a number of neurodegenerative diseases including Alzheimer's disease (AD), Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), and many others. These are commonly referred as neurodegenerative proteinopathies or protein-misfolding diseases. The main characteristic of protein aggregates in these disorders is the fact that they are enriched in amyloid fibrils. Since protein aggregation is considered to play a central role for the onset of neurodegenerative proteinopathies, research is ongoing to develop strategies aimed at preventing or removing protein aggregation in the brain of affected patients...
October 1, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28952832/prevalence-and-pattern-of-antipsychotic-induced-movement-disorders-in-a-tertiary-care-teaching-hospital-in-india-a-cross-sectional-study
#18
Nimisha Desai, Parvati B Patel, Sandip Shah, Tejas K Patel, Saurabh N Shah, Ela Vatsala
OBJECTIVES: To assess prevalence and pattern of movement disorders among patients taking antipsychotic medications. METHODS: This cross-sectional, intensive monitoring (patient interview, case record form review and clinical examination) study was conducted in patients taking antipsychotic drugs irrespective of duration for the development of movement disorders. The psychiatrist used Modified Simpson-Angus Scale score (10-item scale), Barnes' rating scale and Abnormal Involuntary Movement Scale to diagnose parkinsonism, akathisia and tardive dyskinesia, respectively...
September 27, 2017: International Journal of Psychiatry in Clinical Practice
https://www.readbyqxmd.com/read/28952032/neuroprotective-strategies-to-prevent-and-treat-parkinson-s-disease-based-on-its-pathophysiological-mechanism
#19
REVIEW
Yujeong Lee, Min-Sun Kim, Jaewon Lee
Parkinson's disease (PD) is the second most common progressive neurodegenerative disease after Alzheimer's disease. PD exhibits clinical symptoms that include tremors, rigidity, and bradykinesia. Many drugs are available to treat PD, such as, L-dopa, COMT inhibitor, MAO-B inhibitor, and dopamine agonists, but these drugs simply compensate for dopamine loss in PD, and therefore, cannot completely suppress its symptoms or progression. Although the causes of PD are not clearly understood, common pathophysiological pathways, such as, oxidative stress, mitochondrial dysfunction, and neuroinflammation are considered to be etiological factors, and thus, many treatments and interventions have been developed to target these pathophysiological factors...
September 26, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28951838/alteration-in-biochemical-parameters-in-the-brain-of-transgenic-drosophila-melanogaster-model-of-parkinson-s-disease-exposed-to-apigenin
#20
Yasir Hasan Siddique, Smita Jyoti
BACKGROUND: Oxidative stress is one of the key components of the pathology of various neurodegenerative disorders. Parkinson's disease (PD) is characterized by the progressive loss of dopaminergic neurons owing to the aggregation of alpha-synuclein (αS) in the brain. A number of polyphenols have been reported to inhibit the αS aggregation resulting in the possible prevention of PD. The involvement of free radicals in mediating the neuronal death in PD has also been implicated. METHODS: In the present study, the transgenic flies expressing human αS in the brain were exposed to 10 μM, 20 μM, 40 μM, and 80 μM of apigenin established in diet for 24 days...
September 2017: Integrative medicine research
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