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https://www.readbyqxmd.com/read/28092091/preliminary-results-on-long-term-potentiation-like-cortical-plasticity-and-cholinergic-dysfunction-after-miglustat-treatment-in-niemann-pick-disease-type-c
#1
Alberto Benussi, Maria Sofia Cotelli, Maura Cosseddu, Valeria Bertasi, Marinella Turla, Ettore Salsano, Andrea Dardis, Alessandro Padovani, Barbara Borroni
Niemann-Pick disease type C (NPC) is a rare autosomal recessive lysosomal storage disorder, which manifests clinically with a wide range of neurological signs and symptoms. We assessed multiple neurological, neuropsychological and neurophysiological biomarkers using a transcranial magnetic stimulation (TMS) multi-paradigm approach in two patients with NPC carrying a homozygous mutation in the NPC1 gene, and in two heterozygous family members.We assessed short-interval intracortical inhibition (SICI), intracortical facilitation (ICF), long-interval intracortical inhibition (LICI), short-latency afferent inhibition (SAI) and long-term potentiation (LTP)-like cortical plasticity with a paired associative stimulation (PAS) protocol...
January 17, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28091409/effect-of-shensong-yangxin-on-the-progression-of-paroxysmal-atrial-fibrillation-is-correlated-with-regulation-of-autonomic-nerve-activity
#2
Hong-Yi Zhao, Shu-Di Zhang, Kai Zhang, Xi Wang, Qing-Yan Zhao, Shu-Juan Zhang, Zi-Xuan Dai, Yong-Sheng Qian, You-Jing Zhang, Hao-Tian Wei, Yan-Hong Tang, Cong-Xin Huang
BACKGROUND: Shensong Yangxin (SSYX), a traditional Chinese herbal medicine, has long been used clinically to treat arrhythmias in China. However, the mechanism of SSYX on atrial fibrillation (AF) is unknown. In this study, we tested the hypothesis that the effect of SSYX on the progression of paroxysmal AF is correlated with the regulation of autonomic nerve activity. METHODS: Eighteen mongrel dogs were randomly divided into control group (n = 6), pacing group (n = 6), and pacing + SSYX group (n = 6)...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28090804/choline-acetyltransferase-may-contribute-to-the-risk-of-tourette-syndrome-combination-of-family-based-analysis-and-case-control-study
#3
Xiuling Yang, Wenmiao Liu, Mingji Yi, Ru Zhang, Yinglei Xu, Zuzhou Huang, Shiguo Liu, Tang Li
OBJECTIVES: Twin and family analyses have revealed a genetic contribution to Tourette syndrome and postmortem studies have raised the intriguing possibility of a reduction in cholinergic interneuronsin TS patients. METHODS: We selected five tag SNPs (rs100824791, rs12264845, rs1880676, rs3793790 and rs3793798) of Choline Acetyltransferase (CHAT) from the Han Chinese population Hapmap database. Genotyping was conducted on 401 TS nuclear family trios and 405 control subjects...
January 16, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28089695/the-pharmacology-of-tacrine-at-n-methyl-d-aspartate-receptors
#4
REVIEW
Martin Horak, Kristina Holubova, Eugenie Nepovimova, Jan Krusek, Martina Kaniakova, Jan Korabecny, Ladislav Vyklicky, Kamil Kuca, Ales Stuchlik, Jan Ricny, Karel Vales, Ondrej Soukup
The mechanism of tacrine as a precognitive drug has been considered to be complex and not fully understood. It has been reported to involve a wide spectrum of targets involving cholinergic, gabaergic, nitrinergic and glutamatergic pathways. Here, we review the effect of tacrine and its derivatives on the NMDA receptors (NMDAR) with a focus on the mechanism of action and biological consequences related to the Alzheimer's disease treatment. Our findings indicate that effect of tacrine on glutamatergic neurons is both direct and indirect...
January 13, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28088312/dementia-in-parkinson-s-disease
#5
REVIEW
Hasmet A Hanagasi, Zeynep Tufekcioglu, Murat Emre
Dementia can occur in a substantial number of patients with Parkinson's disease with a point prevalence close to 30%. The cognitive profile is characterized by predominant deficits in executive, visuospatial functions, attention and memory. Behavioral symptoms are frequent such as apathy, visual hallucinations and delusions. The most prominent associated pathology is Lewy body-type and biochemical deficit is cholinergic. Placebo-controlled randomized trials with cholinesterase inhibitors demonstrated modest but significant benefits in cognition, behavioral symptoms and global functions...
January 5, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28081467/oxidative-stress-and-mrna-expression-of-acetylcholinesterase-in-the-leukocytes-of-ischemic-patients
#6
Mesut Işık, Şükrü Beydemir, Aslan Yılmaz, Muhammet Emin Naldan, Hatice Esra Aslan, İlhami Gülçin
BACKGROUND: Pathogenesis of ischemic brain injury is occurred by crucial metabolic reasons. For instance, oxidative stress from free radical generation is causing to the thrombotic cerebrovascular stroke. In this case, the measurement of the oxidative stress is very important for a better understanding of the stroke pathophysiology. Because, the oxidative stress in stroke is generally assumed as one of the mechanisms taking part in neuronal damage. Thus, oxidative stress has a vital role in the cholinergic system...
January 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28078612/ameliorative-effect-of-ginsenoside-rg1-on-lipopolysaccharide-induced-cognitive-impairment-role-of-cholinergic-system
#7
Yang Jin, Jian Peng, Xiaona Wang, Dong Zhang, Tianyin Wang
Bacterial endotoxin lipopolysaccharide (LPS) can induce systemic inflammation, and therefore disrupt learning and memory processes. Ginsenoside Rg1, a major bioactive component of ginseng, is shown to greatly improve cognitive function. The present study was designed to further investigate whether administration of ginsenoside Rg1 can ameliorate LPS-induced cognitive impairment in the Y-maze and Morris water maze (MWM) task, and to explore the underlying mechanisms. Results showed that exposure to LPS (500 μg/kg) significantly impaired working and spatial memory and that repeated treatment with ginsenoside Rg1 (200 mg/kg/day, for 30 days) could effectively alleviate the LPS-induced cognitive decline as indicated by increased working and spatial memory in the Y-maze and MWM tests...
January 11, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28078611/hyperbaric-oxygen-prevents-cognitive-impairments-in-mice-induced-by-d-galactose-by-improving-cholinergic-and-anti-apoptotic-functions
#8
Chunxia Chen, Luying Huang, Zhihuan Nong, Yaoxuan Li, Wan Chen, Jianping Huang, Xiaorong Pan, Guangwei Wu, Yingzhong Lin
Our previous study demonstrated that hyperbaric oxygen (HBO) improved cognitive impairments mainly by regulating oxidative stress, inflammatory responses and aging-related gene expression. However, a method for preventing cognitive dysfunction has yet to be developed. In the present study, we explored the protective effects of HBO on the cholinergic system and apoptosis in D-galactose (D-gal)-treated mice. A model of aging was established via systemic intraperitoneal injection of D-gal daily for 8 weeks. HBO was administered during the last 2 weeks of D-gal injection...
January 11, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28077962/the-influence-of-duodenally-delivered-shakuyakukanzoto-shao-yao-gan-cao-tang-on-duodenal-peristalsis-during-endoscopic-retrograde-cholangiopancreatography-a-randomised-controlled-trial
#9
Haruka Fujinami, Shinya Kajiura, Jun Nishikawa, Takayuki Ando, Toshiro Sugiyama
BACKGROUND: Anti-cholinergic agents may be used to inhibit duodenal peristalsis, but they may have adverse effects. Shakuyakukanzoto (Shao Yao Gan Cao Tang) has an anti-spasmodic effect and has been used before for oesophagogastroduodenoscopy and colonoscopy. This randomised clinical trial aimed to evaluate the inhibitory effect of Shakuyakukanzoto on duodenal peristalsis, and its usefulness when administered into the duodenum just before endoscopic retrograde cholangiopancreatography (ERCP)...
2017: Chinese Medicine
https://www.readbyqxmd.com/read/28077670/the-mammalian-efferent-vestibular-system-plays-a-crucial-role-in-vestibulo-ocular-reflex-compensation-after-unilateral-labyrinthectomy
#10
Patrick P Hübner, Serajul I Khan, Americo A Migliaccio
The α9 nicotinic acetylcholine receptor (α9-nAChR) subunit is expressed in the vestibular and auditory periphery, and its loss of function could compromise peripheral input from the predominantly-cholinergic efferent vestibular system (EVS). A recent study has shown that α9-nAChRs play an important role in short-term vestibulo-ocular reflex (VOR) adaptation. We hypothesise that α9-nAChRs could also be important for other forms of vestibular plasticity, such as that needed for VOR recovery after vestibular organ injury...
January 11, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28072465/splicing-regulation-and-dysregulation-of-cholinergic-genes-expressed-at-the-neuromuscular-junction
#11
REVIEW
Kinji Ohno, Mohammad Alinoor Rahman, Mohammad Nazim, Farhana Nasrin, Yingni Lin, Jun-Ichi Takeda, Akio Masuda
We humans have evolved by acquiring diversity of alternative RNA metabolisms including alternative means of splicing and transcribing non-coding genes, and not by acquiring new coding genes. Tissue-specific and developmental stage-specific alternative RNA splicing is achieved by tightly regulated spatiotemporal regulation of expressions and activations of RNA-binding proteins that recognize their cognate splicing cis-elements on nascent RNA transcripts. Genes expressed at the neuromuscular junction (NMJ) are also alternatively spliced...
January 10, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28072454/non-neuronal-acetylcholine-involved-in-reproduction-in-mammals-and-honeybees
#12
REVIEW
Ignaz Wessler, Charles James Kirkpatrick
Bacteria and archaea synthesize acetylcholine (ACh). Thus it can be postulated that ACh was created by nature roughly 3 billion years ago. Therefore, the wide expression of ACh in nature (i.e. in bacteria, archaea, unicellular organisms, plants, fungi, non-vertebrates and vertebrates and the abundance of non-neuronal cells of mammals) is not surprising. The term non-neuronal ACh and non-neuronal cholinergic system have been introduced to describe the auto- and paracrine, i.e. local regulatory actions of cells not innervated by neuronal cholinergic fibers to communicate among themselves...
January 10, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28069927/impact-of-altered-cholinergic-tones-on-the-neurovascular-coupling-response-to-whisker-stimulation
#13
Clotilde Lecrux, Claire H Sandoe, Sujaya Neupane, Pascal Kropf, Xavier Toussay, Xin-Kang Tong, María Lacalle-Aurioles, Amir Shmuel, Edith Hamel
Brain imaging techniques that use vascular signals to map changes in neuronal activity rely on the coupling between electrophysiology and hemodynamics, a phenomenon referred to "neurovascular coupling" (NVC). It is unknown whether this relationship remains reliable under altered brain states associated to acetylcholine (ACh) levels, such as attention and arousal, and in pathological conditions like Alzheimer's disease. We therefore assessed the effects of varying ACh tone on whisker evoked-NVC responses in rat barrel cortex, measured by cerebral blood flow (CBF) and neurophysiological recordings (local field potentials, LFPs)...
January 9, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28069463/extinction-and-recovery-of-an-avoidance-memory-impaired-by-scopolamine
#14
N M Navarro, M C Krawczyk, M M Boccia, M G Blake
Pre-training administration of scopolamine (SCP) resembles situations of cholinergic dysfunction, leading to memory impairment of mice trained in an inhibitory avoidance task. We suggest here that SCP does not impair memory formation, but acquisition is affected in a way that reduces the strength of the stored memory, thus making this memory less able to control behavior when tested. Hence, a memory trace is stored, but is poorly expressed during the test. Although weakly expressed, this memory shows extinction during successive tests, and can be strengthened by using a reminder...
January 6, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28069458/loganin-enhances-long-term-potentiation-and-recovers-scopolamine-induced-learning-and-memory-impairments
#15
Eun-Sang Hwang, Hyun-Bum Kim, Seok Lee, Min-Ji Kim, Sung-Ok Lee, Seung-Moo Han, Sungho Maeng, Ji-Ho Park
Although the incidence rate of dementia is rapidly growing in the aged population, therapeutic and preventive reagents are still suboptimal. Various model systems are used for the development of such reagents in which scopolamine is one of the favorable pharmacological tools widely applied. Loganin is a major iridoid glycoside obtained from Corni fructus (Cornusofficinaliset Zucc) and demonstrated to have anti-inflammatory, anti-tumor and osteoporosis prevention effects. It has also been found to attenuate Aβ-induced inflammatory reactions and ameliorate memory deficits induced by scopolamine...
January 6, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28065942/neuregulin-1-erbb-module-in-c-bouton-synapses-on-somatic-motor-neurons-molecular-compartmentation-and-response-to-peripheral-nerve-injury
#16
Anna Casanovas, Sara Salvany, Víctor Lahoz, Olga Tarabal, Lídia Piedrafita, Raimundo Sabater, Sara Hernández, Jordi Calderó, Josep E Esquerda
The electric activity of lower motor neurons (MNs) appears to play a role in determining cell-vulnerability in MN diseases. MN excitability is modulated by cholinergic inputs through C-type synaptic boutons, which display an endoplasmic reticulum-related subsurface cistern (SSC) adjacent to the postsynaptic membrane. Besides cholinergic molecules, a constellation of proteins involved in different signal-transduction pathways are clustered at C-type synaptic sites (M2 muscarinic receptors, Kv2.1 potassium channels, Ca(2+) activated K(+) [SK] channels, and sigma-1 receptors [S1R]), but their collective functional significance so far remains unknown...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065198/random-spatial-patterning-of-cone-bipolar-cell-mosaics-in-the-mouse-retina
#17
Patrick W Keeley, Jason J Kim, Sammy C S Lee, Silke Haverkamp, Benjamin E Reese
Retinal bipolar cells spread their dendritic arbors to tile the retinal surface, extending them to the tips of the dendritic fields of their homotypic neighbors, minimizing dendritic overlap. Such uniform nonredundant dendritic coverage of these populations would suggest a degree of spatial order in the properties of their somal distributions, yet few studies have examined the patterning in retinal bipolar cell mosaics. The present study examined the organization of two types of cone bipolar cells in the mouse retina, the Type 2 cells and the Type 4 cells, and compared their spatial statistical properties with those of the horizontal cells and the cholinergic amacrine cells, as well as to random simulations of cells matched in density and constrained by soma size...
January 2017: Visual Neuroscience
https://www.readbyqxmd.com/read/28063945/calcineurin-inhibitors-improve-memory-loss-and-neuropathological-changes-in-mouse-model-of-dementia
#18
Amit Kumar, Nirmal Singh
AIM: The present study was designed to investigate the potential of Cyclosporine (CsA) and Tacrolimus, the inhibitors of calcineurin (CaN) in cognitive deficits of mice. METHODS: Streptozotocin [STZ, 3mg/kg, injected intracerebroventricular (i.c.v.)] was used to induce memory deficits in NIH mice, while aged mice separately taken served as a natural model of dementia. Morris water maze (MWM) test was employed to evaluate learning and memory of the animals. A battery of biochemical and histopathological studies was also performed...
January 4, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28060207/brain-cholinergic-function-and-response-to-rivastigmine-in-patients-with-chronic-sequels-of-traumatic-brain-injury-a-pet-study
#19
Anna Östberg, Jere Virta, Juha O Rinne, Vesa Oikonen, Pauliina Luoto, Kjell Någren, Eveliina Arponen, Olli Tenovuo
OBJECTIVE: To investigate quantitative positron emission tomography (PET) findings and to study whether the cholinergic function differs between respondents to cholinergic medication versus nonrespondents. SETTING: Outpatient clinic and university PET imaging center. PARTICIPANTS: We studied 17 subjects for more than 1 year after at least moderate traumatic brain injury. Ten of the subjects were respondents and 7 nonrespondents to cholinergic medication...
January 5, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28058727/exppning-how-acetylcholine-improves-gait-in-parkinson-s-disease-an-editorial-highlight-for-deletion-of-the-vesicular-acetylcholine-transporter-from-pedunculopontine-laterodorsal-tegmental-neurons-modifies-gait
#20
EDITORIAL
Björn Falkenburger
Gait impairment is one of the most intractable symptoms of Parkinson's disease, responding poorly to dopaminergic medication. Promising therapeutic strategies include deep brain stimulation (DBS) of the pedunculopontine nucleus (PPN) and enhancing cholinergic neurotransmission by acetylcholine esterase inhibitors. This Editorial discusses an elegant study by Janickova and coworkers in the current issue of the Journal of Neurochemistry, in which the authors engineered mice lacking cholinergic transmission selectively in the PPN and demonstrate that cholinergic neurons of the PPN are critical for gait...
January 6, 2017: Journal of Neurochemistry
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