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Parkinsons and treatment

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https://www.readbyqxmd.com/read/28738061/magnetic-resonance-imaging-and-tensor-based-morphometry-in-the-mptp-non-human-primate-model-of-parkinson-s-disease
#1
Michel Modo, William R Crum, Madeline Gerwig, Anthony C Vernon, Priya Patel, Michael J Jackson, Sarah Rose, Peter Jenner, Mahmoud M Iravani
Parkinson's disease (PD) is the second most common neurodegenerative disorder producing a variety of motor and cognitive deficits with the causes remaining largely unknown. The gradual loss of the nigrostriatal pathway is currently considered the pivotal pathological event. To better understand the progression of PD and improve treatment management, defining the disease on a structural basis and expanding brain analysis to extra-nigral structures is indispensable. The anatomical complexity and the presence of neuromelanin, make the use of non-human primates an essential element in developing putative imaging biomarkers of PD...
2017: PloS One
https://www.readbyqxmd.com/read/28737745/electromagnetized-gold-nanoparticles-mediate-direct-lineage-reprogramming-into-induced-dopamine-neurons-in-vivo-for-parkinson-s-disease-therapy
#2
Junsang Yoo, Euiyeon Lee, Hee Young Kim, Dong-Ho Youn, Junghyun Jung, Hongwon Kim, Yujung Chang, Wonwoong Lee, Jaein Shin, Soonbong Baek, Wonhee Jang, Won Jun, Soochan Kim, Jongki Hong, Hi-Joon Park, Christopher J Lengner, Sang Hyun Moh, Youngeun Kwon, Jongpil Kim
Electromagnetic fields (EMF) are physical energy fields generated by electrically charged objects, and specific ranges of EMF can influence numerous biological processes, which include the control of cell fate and plasticity. In this study, we show that electromagnetized gold nanoparticles (AuNPs) in the presence of specific EMF conditions facilitate an efficient direct lineage reprogramming to induced dopamine neurons in vitro and in vivo. Remarkably, electromagnetic stimulation leads to a specific activation of the histone acetyltransferase Brd2, which results in histone H3K27 acetylation and a robust activation of neuron-specific genes...
July 17, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28737225/psychostimulant-effect-of-dopaminergic-treatment-and-addictions-in-parkinson-s-disease
#3
Benoit Delpont, Eugénie Lhommée, Hélène Klinger, Emmanuelle Schmitt, Amélie Bichon, Valérie Fraix, Anna Castrioto, Jean-Louis Quesada, Pierre Pélissier, Andrea Kistner, Sébastien Carnicella, Christian Lüscher, Emmanuel Broussolle, Pierre Pollak, Stéphane Thobois, Paul Krack
BACKGROUND: Dopamine replacement therapy in PD has been associated with both behavioral addictions and dopamine addiction. OBJECTIVES: To investigate potential association between l-dopa induced neuropsychiatric fluctuations and addictions in PD. METHODS: A cohort of 102 patients with PD suffering from motor complications of l-dopa treatment was prospectively analyzed. We evaluated dopamine addiction, behavioral addictions, and neuropsychiatric fluctuations using the Ardouin scale of behavior in PD...
July 24, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28736624/lyme-and-dopaminergic-function-hypothesizing-reduced-reward-deficiency-symptomatology-by-regulating-dopamine-transmission
#4
Kenneth Blum, Edward J Modestino, Marcelo Febo, Bruce Steinberg, Thomas McLaughlin, Lyle Fried, David Baron, David Siwicki, Rajendra D Badgaiyan
The principal vector of Lyme disease in the United States is Ixodes scapularis: black legged or deer ticks. There is increased evidence that those infected may be plagued by anxiety or depression as well. Researchers have identified transcripts coding for two putative cytosolic sulfotransferases in these ticks, which recognized phenolic monoamines as their substrates. It is hypothesized that protracted Lyme disease sequelae may be due to impairment of dopaminergic function of the brain reward circuitry. The subsequent recombinant proteins exhibited sulfotransferase function against two neurotransmitters: dopamine and octopamine...
May 2017: Journal of Systems and Integrative Neuroscience
https://www.readbyqxmd.com/read/28735099/subcellular-expression-of-aquaporin-4-in-substantia-nigra-of-normal-and-mptp-treated-mice
#5
Agnete Prydz, Katja Stahl, Maja Puchades, Nina Davarpaneh, Maria Nadeem, Ole Petter Ottersen, Vidar Gundersen, Mahmood Amiry-Moghaddam
Aquaporin-4 (AQP4) is the predominant water channel in mammalian CNS where it is localized at the perivascular astrocytic foot processes abutting brain microvessels. Several lines of evidence suggest that AQP4 is involved in important homeostatic functions and that mislocalization of the perivascular pool of AQP4 is implicated in several different brain disorders. A recent study suggests that the differential susceptibility of midbrain dopaminergic neurons to the parkinsonogenic toxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) depends on the expression of AQP4...
July 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28734998/oxidative-stress-with-tau-hyperphosphorylation-in-memory-impaired-1-2-diacetylbenzene-treated-mice
#6
Sin-Woo Kang, Sung Jin Kim, Min-Sun Kim
Long-term exposure to organic solvent may be related to the incidence of neuronal diseases, such as, Alzheimer's disease, depression, multiple sclerosis, dementia, Parkinson's disease. Previously, the authors reported 1,2-diacetylbenzene (DAB; a neurotoxic metabolite of 1,2-diethylbenzene) causes central and peripheral neuropathies that lead to motor neuronal deficits. Furthermore, it is known DAB increases oxidative stress and protein adduct levels and impairs hippocampal neurogenesis in mice. The authors examined the relevance of oxidative stress and tau hyperphosphorylation in the hippocampus...
July 19, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28734699/an-update-on-the-genetics-of-dementia-with-lewy-bodies
#7
REVIEW
Leonie J M Vergouw, Inger van Steenoven, Wilma D J van de Berg, Charlotte E Teunissen, John C van Swieten, Vincenzo Bonifati, Afina W Lemstra, Frank Jan de Jong
The genetic architecture of dementia with Lewy bodies (DLB) is increasingly taking shape. Initially, genetic research focused mainly on linkage and candidate gene studies in small series of DLB patients. More recently, association and exome sequencing studies in larger groups have been conducted, and have shown that several variants in GBA and the APOE ε4 allele are important genetic risk factors for DLB. However, genetic research in DLB is still in its infancy. So far, many genetic studies have been biased and performed in clinically and pathologically heterogeneous populations...
July 13, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28733540/am1241-alleviates-mptp-induced-parkinson-s-disease-and-promotes-the-regeneration-of-da-neurons-in-pd-mice
#8
Jun Shi, Qiong Cai, Jingxing Zhang, Xiaolie He, Yigang Liu, Rongrong Zhu, Lingjing Jin
The main pathological feature of Parkinson's disease (PD) is the loss of dopaminergic neurons in the substantia nigra. In this study, we investigated the role of cannabinoid receptor 2 (CB2R) agonist AM1241 on 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced neurotoxicity in a mouse model of PD. Upon treatment with AM1241, the decreased CB2R level in the PD mouse brain was reversed and the behavior score markedly elevated, accompanied with a dose-dependent increase of dopamine and serotonin. In addition, western blot assay and immunostaining results suggested that AM1241 significantly activated PI3K/Akt/MEK phosphorylation and increased the expression of Parkin and PINK1, both in the substantia nigra and hippocampus...
June 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732502/chronic-glucocorticoid-exposure-activates-bk-nlrp1-signal-involving-in-hippocampal-neuron-damage
#9
Biqiong Zhang, Yaodong Zhang, Wenning Wu, Tanzhen Xu, Yanyan Yin, Junyan Zhang, Dake Huang, Weizu Li
BACKGROUND: Neuroinflammation mediated by NLRP1 (nucleotide-binding oligomerization domain (NOD)-like receptor protein 1) inflammasome plays an important role in many neurological diseases such as Parkinson's disease (PD) and Alzheimer's disease (AD). Our previous studies showed that chronic glucocorticoid (GC) exposure increased brain inflammation via NLRP1 inflammasome and induce neurodegeneration. However, little is known about the mechanism of chronic GC exposure on NLRP1 inflammasome activation in hippocampal neurons...
July 21, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28730349/manganese-mediated-decrease-in-levels-of-c-ret-and-tyrosine-hydroxylase-expression-in-vitro
#10
Mayuko Y Kumasaka, Ichiro Yajima, Nobutaka Ohgami, Hiromasa Ninomiya, Machiko Iida, Xiang Li, Reina Oshino, Hiroko Tanihata, Masafumi Yoshinaga, Masashi Kato
Previous studies showed that overexposure to manganese causes parkinsonism, a disorder of dopaminergic neurons. Previous studies also showed that activity of c-RET kinase controls dopamine production through regulation of tyrosine hydroxylase (TH) expression, suggesting the involvement of c-RET in the development of parkinsonism. To our knowledge, however, there is no report showing a correlation between manganese-mediated parkinsonism and c-RET. In this study, we examined the effect of manganese on the expression and/or activation levels of c-RET and TH in human TH-expressing cells (TGW cells)...
July 20, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28729942/problems-related-to-levodopa-carbidopa-intestinal-gel-treatment-in-advanced-parkinson-s-disease
#11
Marianne Udd, Jukka Lyytinen, Johanna Eerola-Rautio, Anu Kenttämies, Outi Lindström, Leena Kylänpää, Eero Pekkonen
BACKGROUND: Continuous levodopa-carbidopa intestinal gel (LCIG) diminishes daily "off" time and dyskinesia in patients with advanced Parkinson's disease (PD). Complications are common with percutaneous endoscopic gastrostomy with a jejunal extension tube (PEG-J). AIM OF THE STUDY: To report the clinical outcome of LCIG in patients with advanced PD in the years 2006-2014 at Helsinki University Hospital. PATIENTS AND METHODS: Levodopa-carbidopa intestinal gel treatment started following PEG-J placement in patients with advanced PD after successful in-hospital LCIG trial with a nasojejunal tube...
July 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28728834/calcium-signaling-and-molecular-mechanisms-underlying-neurodegenerative-diseases
#12
REVIEW
Ekaterina Pchitskaya, Elena Popugaeva, Ilya Bezprozvanny
Calcium (Ca(2+)) is a ubiquitous second messenger that regulates various activities in eukaryotic cells. Especially important role calcium plays in excitable cells. Neurons require extremely precise spatial-temporal control of calcium-dependent processes because they regulate such vital functions as synaptic plasticity. Recent evidence indicates that neuronal calcium signaling is abnormal in many of neurodegenerative disorders such as Alzheimer's disease (AD), Huntington's disease (HD) and Parkinson's disease (PD)...
June 30, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28728516/a-rare-cause-of-severe-epigastric-pain-emesis-and-increased-lipase
#13
Daan Van Olmen, Francis Somville, Gerry Van der Mieren
INTRODUCTION: Gastric volvulus is an uncommon, but severe pathology requiring early diagnosis and urgent treatment. Its atypical symptoms and rarity make it difficult to diagnose, possibly leading to delayed treatment and fatal complications. PATIENTS AND METHODS: We present a case of a 73-year-old patient with Parkinson's disease with complaints of severe epigastric pain, emesis and an increased lipase. RESULTS: Diagnosis of an organo-axial gastric volvulus was made...
July 20, 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28728000/tailor-made-purified-human-platelet-lysate-concentrated-in-neurotrophins-for-treatment-of-parkinson-s-disease
#14
Ming-Li Chou, Joe-Wei Wu, Flore Gouel, Aurélie Jonneaux, Kelly Timmerman, Ting-Yi Renn, Charlotte Laloux, Hung-Ming Chang, Liang-Tzung Lin, Jean-Christophe Devedjian, David Devos, Thierry Burnouf
Human platelet lysates (PLs), which contain multiple neurotrophins, have been proposed for treating neurodegenerative disorders, including Parkinson's disease (PD). However, current PLs suspended in plasma have high protein content and contain fibrinogen/fibrin and, following activation, also proteolytic and thrombogenic enzymes. Upon brain administration, such PLs may saturate the cerebrospinal fluid and exert neurotoxicity. We assessed whether purified PLs, concentrated in neurotrophins, protected dopaminergic neurons in PD models...
July 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28726961/functional-single-walled-carbon-nanotubes-car-for-targeting-dopamine-delivery-into-the-brain-of-parkinsonian-mice
#15
Qing Guo, Huihui You, Xu Yang, Bencheng Lin, Zhihong Zhu, Zhisong Lu, Xiaoxiao Li, Yun Zhao, Lin Mao, Shiping Shen, Haoyan Cheng, Jiting Zhang, Lingfu Deng, Jianhua Fan, Zhuge Xi, Rui Li, Chang Ming Li
Current treatments for Parkinson's disease (PD) are limited, partly due to the difficulties posed by the blood brain barrier (BBB) when delivering drugs to the brain. Herein, we explore the feasibility and efficacy of functional single-walled carbon nanotubes 'CAR' (SWCNT-PEGs-Lf) which carry and target-deliver dopamine (DA) to the brain in PD mice for treatment. SWCNTs can penetrate the cell-membrane remarkably, with the characteristics including high drug-loading and pH-dependent therapeutic unloading capacities...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28726524/subnanomolar-indazole-5-carboxamide-inhibitors-of-monoamine-oxidase-b-mao-b-continued-indications-of-iron-binding-experimental-evidence-for-optimised-solubility-and-brain-penetration
#16
Nikolay T Tzvetkov, Liudmil Antonov
Pharmacological and physicochemical studies of N-unsubstituted indazole-5-carboxamides (subclass I) and their structurally optimised N1-methylated analogues (subclass II), initially developed as drug and radioligand candidates for the treatment and diagnosis of Parkinson's disease (PD), are presented. The compounds are highly brain permeable, selective, reversible, and competitive monoamine oxidase B (MAO-B) inhibitors with improved water-solubility and subnanomolar potency (pIC50 >8.8). Using a well-validated, combined X-ray/modelling technology platform, we performed a semi-quantitative analysis of the binding modes of all compounds and investigated the role of the indazole N1 position for their MAO-B inhibitory activity...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28725954/proteasome-stress-triggers-death-of-sh-sy5y-and-t98g-cells-via-different-cellular-mechanisms
#17
Ivana Pilchova, Katarina Klacanova, Katarina Dibdiakova, Simona Saksonova, Andrea Stefanikova, Eva Vidomanova, Lucia Lichardusova, Jozef Hatok, Peter Racay
Overload or dysfunction of ubiquitin-proteasome system (UPS) is implicated in mechanisms of neurodegeneration associated with neurodegenerative diseases, e.g. Parkinson and Alzheimer disease, and ischemia-reperfusion injury. The aim of this study was to investigate the possible association between viability of neuroblastoma SH-SY5Y and glioblastoma T98G cells treated with bortezomib, inhibitor of 26S proteasome, and accumulation of ubiquitin-conjugated proteins with respect to direct cytotoxicity of aggregates of ubiquitin-conjugated proteins...
July 19, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28725921/-parkinson-s-disease-in-the-elderly
#18
Rüdiger Lange, Frank Erbguth
Due to the increasing life expectancy and a higher incidence in the elderly, the number of elderly patients with idiopathic Parkinson's disease will increase in the coming years. Since the burden of comorbidities is higher and medication side effects are more likely in the elderly, particularly in the light of frequently occurring polypharmacy, increased awareness and therapeutic knowledge is necessary. Besides the therapy of motor symptoms, non-motor symptoms, e. g. neuropsychiatric and autonomic disorders, also need to be addressed as they can also greatly impair the quality of life...
July 19, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28725655/cell-replacement-therapy-is-the-remedial-solution-for-treating-parkinson-s-disease
#19
REVIEW
Venkatesan Dhivya, Vellingiri Balachandar
The selective degeneration of dopaminergic (DA) neurons in Parkinson's disease (PD) has made an idol target for cell replacement therapies and other emerging surgical treatments. Certainly, by transplantation method, the therapeutic regimens such as human fetal ventral midbrain (hfVM) cells, human embryonic stem cells (hESCs), human neural stem/precursor/ progenitor cells (hNSCs/hNPCs), human mesenchymal stem cells (hMSCs), human induced neural stem cells (hiNSCs), and human induced pluripotent stem cells (hiPSCs) have been used into DA deficient striatum...
2017: Stem Cell Investigation
https://www.readbyqxmd.com/read/28725212/neurochemical-systems-of-the-retina-involved-in-the-control-of-movement
#20
Gregory L Willis, Christopher B Freelance
Recent studies have revealed that the retina may exert control over deep brain function and may be importantly involved in the etiology, progression, and treatment of disorders such as Parkinson's disease (PD). While such a concept is uncharted territory and even less is known about the mechanism by which this might be achieved, this study was undertaken to determine how retinal dopamine (DA), serotonin (5-HT), and melatonin (MEL) neurotransmitter systems might be involved in the control of movement in their own right...
2017: Frontiers in Neurology
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