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Neuro plasticity

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https://www.readbyqxmd.com/read/29289296/identification-of-differentially-expressed-genes-response-to-tcdd-in-rat-brain-after-long-term-low-dose-exposure
#1
Yangsheng Chen, Li Xu, Heidi Q H Xie, Tuan Xu, Hualing Fu, Songyan Zhang, Rui Sha, Yingjie Xia, Bin Zhao
Several cohort studies have reported that dioxin and dioxin-like polychlorinated biphenyls might impair the nervous system and lead to neurological or neurodegenerative diseases in the elder people, but there is limited research on the involved mechanism. By using microarray analysis, we figured out the differentially expressed genes between brain samples from SD rats after low-dose (0.1μg/(kg▪bw)) dioxin exposure for six months and controls. To investigate the function changes in the course of dioxin exposure, Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed on the differentially expressed genes...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29244485/critical-role-of-trp-588-of-presynaptic-munc13-1-for-ligand-binding-and-membrane-translocation
#2
Joydip Das, Noemi Kedei, Jessica S Kelsey, Youngki You, Satyabrata Pany, Gary A Mitchell, Nancy E Lewin, Peter M Blumberg
Munc13-1 is a presynaptic active-zone protein essential for neurotransmitter release and presynaptic plasticity in the brain. This multi-domain scaffold protein contains a C1 domain that binds to the activator diacylglycerol/phorbol ester. Although the C1 domain bears close structural homology with the C1 domains of protein kinase C (PKC), the tryptophan residue at position 22 (588 in the full-length Munc13-1) occludes the activator binding pocket, which is not the case for PKC. To elucidate the role of this tryptophan, we generated W22A, W22K, W22D, W22Y and W22F substitutions in the full-length Munc13-1, expressed the GFP- tagged constructs in Neuro-2a cells, and measured their membrane translocation in response to phorbol ester treatment by imaging of the live cells using confocal microscopy...
December 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/29226668/specific-dopamine-sensing-based-on-short-term-plasticity-behavior-of-a-whole-organic-artificial-synapse
#3
Martina Giordani, Marcello Berto, Michele Di Lauro, Carlo Augusto Bortolotti, Michele Zoli, Fabio Biscarini
In this work, we demonstrate the ultra-sensitive and selec-tive detection of dopamine by means of a neuro-inspired device platform without the need of a specific recognition moiety. The sensor is a whole organic device featuring two electrodes made of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate - PEDOT:PSS - patterned on a polydymethylsiloxane - PDMS - flexible substrate. One electrode is pulsed with a train of voltage square waves, to mimic the pre-synaptic neuron behavior, while the other is used to record the displacement current, mimicking the post-synaptic neuron...
December 11, 2017: ACS Sensors
https://www.readbyqxmd.com/read/29180673/calhm2-governs-astrocytic-atp-releasing-in-the-development-of-depression-like-behaviors
#4
M Jun, Q Xiaolong, Y Chaojuan, P Ruiyuan, W Shukun, W Junbing, H Li, C Hong, C Jinbo, W Rong, L Yajin, M Lanqun, W Fengchao, W Zhiying, A Jianxiong, W Yun, Z Xia, Z Chen, Y Zengqiang
Extracellular ATP is a widespread cell-to-cell signaling molecule in the brain, where it functions as a neuromodulator by activating glia and neurons. Although ATP exerts multiple effects on synaptic plasticity and neuro-glia interactions, as well as in mood disorders, the source and regulation of ATP release remain to be elaborated. Here, we define Calhm2 as an ATP-releasing channel protein based on in vitro and in vivo models. Conventional knockout and conditional astrocyte knockout of Calhm2 both lead to significantly reduced ATP concentrations, loss of hippocampal spine number, neural dysfunction and depression-like behaviors in mice, which can be significantly rescued by ATP replenishment...
November 28, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29175959/disrupted-neuro-glial-metabolic-coupling-after-peripheral-surgery
#5
Teresa Femenía, Alfredo Giménez-Cassina, Simone Codeluppi, Teresa Fernández-Zafra, Yurika Katsu-Jiménez, Niccolò Terrando, Lars I Eriksson, Marta Gómez-Galán
Immune-related events in the periphery can remotely affect brain function, contributing to neurodegenerative processes and cognitive decline. In mice, peripheral surgery induces a systemic inflammatory response associated with changes in hippocampal synaptic plasticity and transient cognitive decline, however the underlying mechanisms remain unknown. Here we investigated the effect of peripheral surgery on neuronal-glial function within hippocampal neuronal circuits of relevance to cognitive processing in male mice at 6, 24, and 72h post-surgery...
November 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29146293/andrographolide-a-promising-therapeutic-agent-negatively-regulates-glial-cell-derived-neurodegeneration-of-prefrontal-cortex-hippocampus-and-working-memory-impairment
#6
Sudeshna Das, K P Mishra, Lilly Ganju, S B Singh
Over activation of glial cell derived innate immune factors induces neuro-inflammation that results in neurodegenerative disease, like working memory impairment. In this study, we have investigated the role of andrographolide, a major constituent of Andrographis paniculata plant, in reduction of reactive glial cell derived working memory impairment. Real time PCR, Western bloting, flow cytometric and immunofluorescence studies demonstrated that andrographolide inhibited lipopolysaccharide (LPS)-induced overexpression of HMGB1, TLR4, NFκB, COX-2, iNOS, and release of inflammatory mediators in primary mix glial culture, adult mice prefrontal cortex and hippocampus region...
November 8, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29038516/eeg-topographies-provide-subject-specific-correlates-of-motor-control
#7
Elvira Pirondini, Martina Coscia, Jesus Minguillon, José Del R Millán, Dimitri Van De Ville, Silvestro Micera
Electroencephalography (EEG) of brain activity can be represented in terms of dynamically changing topographies (microstates). Notably, spontaneous brain activity recorded at rest can be characterized by four distinctive topographies. Despite their well-established role during resting state, their implication in the generation of motor behavior is debated. Evidence of such a functional role of spontaneous brain activity would provide support for the design of novel and sensitive biomarkers in neurological disorders...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28933267/neonatal-plasticity-of-the-nociceptive-system-mechanisms-effects-and-treatment-of-repetitive-painful-procedures-during-nicu-admittance
#8
N J Van den Hoogen, J Patijn, D Tibboel, E A Joosten
INTRODUCTION: In Neonatal Intensive Care Unit (NICU), prematurely born infants undergo a range of skin breaking and painful procedures. At the same time, the spinal nociceptive system is in a sensitive developmental stage. Both neonatal repetitive painful procedures and their treatment can induce plasticity of the neonatal spinal nociceptive system, causing long-lasting alterations to pain processing and pain reactivity. METHODS: This review focuses on developmental processes related to the nociceptive network in the spinal dorsal horn and more specifically at mechanisms related to 1...
September 21, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28903026/differential-expression-of-genes-in-fetal-brain-as-a-consequence-of-maternal-protein-deficiency-and-nematode-infection
#9
Manjurul Haque, Lisa M Starr, Kristine G Koski, Marilyn E Scott
Maternal dietary protein deficiency and gastrointestinal nematode infection during early pregnancy have negative impacts on both maternal placental gene expression and fetal growth in the mouse. Here we used next-generation RNA sequencing to test our hypothesis that maternal protein deficiency and/or nematode infection also alter the expression of genes in the developing fetal brain. Outbred pregnant CD1 mice were used in a 2×2 design with two levels of dietary protein (24% versus 6%) and two levels of infection (repeated sham versus Heligmosomoides bakeri beginning at gestation day 5)...
September 10, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28894435/neuroactive-steroids-receptor-interactions-and-responses
#10
REVIEW
Kald Beshir Tuem, Tesfay Mehari Atey
Neuroactive steroids (NASs) are naturally occurring steroids, which are synthesized centrally as de novo from cholesterol and are classified as pregnane, androstane, and sulfated neurosteroids (NSs). NASs modulate many processes via interacting with gamma-aminobutyric acid (GABA), N-methyl-d-aspartate, serotonin, voltage-gated calcium channels, voltage-dependent anion channels, α-adrenoreceptors, X-receptors of the liver, transient receptor potential channels, microtubule-associated protein 2, neurotrophin nerve growth factor, and σ1 receptors...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28876567/a-review-of-presentations-to-the-surgical-research-society-of-southern-africa-and-the-association-of-surgeons-of-south-africa-from-2010-to-2016
#11
S Burger, S van Straten, S Rayne
This paper looks at research done in South Africa from 2010 to 2016. We reviewed a total of 679 abstracts, posters and oral presentations submitted to the SAJS and the ASSA congresses during this time. During this time 21945 patients were investigated with an average of 577,5 patients per study. Each paper had on average 3,5 authors. The most popular topics are trauma (23%), gastrointestinal surgery (18%) and breast (11%). Upcoming topics include: reducing sepsis, global surgery, procedural discussion, infectious diseases (HIV/ TB), post-operative healing, ENT, neuro, plastic surgery, cardiothoracic and paediatric surgery...
September 2017: South African Journal of Surgery. Suid-Afrikaanse Tydskrif Vir Chirurgie
https://www.readbyqxmd.com/read/28846500/neuro-cardio-and-immunoplasticity-effects-of-early-adversity
#12
Eric Pakulak, Courtney Stevens, Helen Neville
The relationship between early adversity and outcomes across the lifespan is apparent in a striking range of measures. Evidence suggests that many of these outcomes can be traced to the impacts of early adversity on multiple and integrated biological systems mediated by the brain. In this review, we integrate empirical and theoretical advances in the understanding of relationships among the brain and the functions of the endocrine, autonomic, and immune systems. We emphasize the effects of environmental experiences related to caregiver relationships because it is these experiences, in particular, that shape regulatory and threat response systems in ways that increase vulnerability and may underlie the wide range of poor outcomes associated with early adversity...
August 28, 2017: Annual Review of Psychology
https://www.readbyqxmd.com/read/28833676/the-subthalamic-nucleus-external-globus-pallidus-loop-biases-exploratory-decisions-towards-known-alternatives-a-neuro-computational-study
#13
Javier Baladron, Atsushi Nambu, Fred H Hamker
Theories and models of the basal ganglia have mainly focused on the role of three different cortico-thalamic pathways: direct, indirect and hyperdirect. Although the indirect and the hyperdirect pathways are linked through the bidirectional connections between the subthalamic nucleus (STN) and the external globus pallidus (GPe), the role of their interactions has been mainly discussed in the context of a dysfunction (abnormal oscillations in Parkinson's disease) and not of its function. We here propose a novel role for the loop formed by the STN and the GPe...
August 22, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28818270/the-glass-ceiling-a-biological-phenomenon
#14
Tom W J Schulpen
Many brilliant and ambitious young women lose their drive for top careers after childbirth. New maternal impulses are at odds with their original ambitions and for many mothers stress and frustration will be the result as they have to combine child care with workweeks of 60-80h to reach or remain at the top. Pregnancy hormones modify the female's brain as has been demonstrated already for decades in animals. This brain plasticity due to adult neurogenesis in the so called maternal circuitry of the limbic system is long-lasting and perhaps lifelong...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28807253/interdisciplinary-reconstruction-of-oncological-resections-at-the-skull-base-scalp-and-facial-region
#15
REVIEW
P M Vogt, T R Mett, G F Broelsch, C Radtke, N-C Gellrich, J K Krauss, M Samii, R Ipaktchi
Extensive bone and soft tissue defects of the skull require unique plastic and reconstructive techniques to avoid and optimize aesthetic appearance following oncological resections. Procedures are ideally planned in an interdisciplinary board composed of neurosurgery, otorhinolaryngology, plastic and reconstructive surgery to facilitate reconstructive procedures of soft tissue and bone as early as possible in one approach. Large resections may require plastic surgery involvement from the beginning. Herein, we describe the function of a multidisciplinary approach to complex oncologic resections of the cranial base, scalp, and facial regions for neuro-oncologic patients...
September 2017: Surgical Oncology
https://www.readbyqxmd.com/read/28761554/towards-neuro-inspired-symbolic-models-of-cognition-linking-neural-dynamics-to-behaviors-through-asynchronous-communications
#16
Pierre Bonzon
A computational architecture modeling the relation between perception and action is proposed. Basic brain processes representing synaptic plasticity are first abstracted through asynchronous communication protocols and implemented as virtual microcircuits. These are used in turn to build mesoscale circuits embodying parallel cognitive processes. Encoding these circuits into symbolic expressions gives finally rise to neuro-inspired programs that are compiled into pseudo-code to be interpreted by a virtual machine...
August 2017: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/28719644/isolation-of-putative-stem-cells-present-in-human-adult-olfactory-mucosa
#17
Tamara Tanos, Alberto Maria Saibene, Carlotta Pipolo, Paolo Battaglia, Giovanni Felisati, Alicia Rubio
The olfactory mucosa (OM) has the unique characteristic of performing an almost continuous and lifelong neurogenesis in response to external injuries, due to the presence of olfactory stem cells that guarantee the maintenance of the olfactory function. The easy accessibility of the OM in humans makes these stem cells feasible candidates for the development of regenerative therapies. In this report we present a detailed characterization of a patient-derived OM, together with a description of cell cultures obtained from the OM...
2017: PloS One
https://www.readbyqxmd.com/read/28718304/the-role-of-surgery-in-low-grade-gliomas-do-timing-and-extent-of-resection-matter
#18
Hugues Duffau
Hugues Duffau is a Professor and Chairman of the Neurosurgery Department in the Montpellier University Medical Center and Head of the INSERM 1051 Team "plasticity of the central nervous system, human stem cells and glial tumors" at the Institute for Neurosciences of Montpellier (France). He is an expert in the awake cognitive neurosurgery of slow-growing brain tumors, such as low-grade gliomas, a routine which he has developed since 20 years. His fundamental approach is centered on the concepts of the brain connectomics and neuroplasticity, breaking with the traditional localizationist view of cerebral processing...
July 18, 2017: CNS Oncology
https://www.readbyqxmd.com/read/28714607/new-insights-into-how-serotonin-selective-reuptake-inhibitors-shape-the-developing-brain
#19
REVIEW
Jay A Gingrich, Heli Malm, Mark S Ansorge, Alan Brown, Andre Sourander, Deepika Suri, Cátia M Teixeira, Martha K Caffrey Cagliostro, Darshini Mahadevia, Myrna M Weissman
Development passes through sensitive periods, during which plasticity allows for genetic and environmental factors to exert indelible influence on the maturation of the organism. In the context of central nervous system (CNS) development, such sensitive periods shape the formation of neuro-circuits that mediate, regulate, and control behavior. This general mechanism allows for development to be guided by both the genetic blueprint, as well as the environmental context. While allowing for adaptation, such sensitive periods are also windows of vulnerability during which external and internal factors can confer risk to brain disorders by derailing adaptive developmental programs...
July 17, 2017: Birth Defects Research
https://www.readbyqxmd.com/read/28711720/onset-age-of-l2-acquisition-influences-language-network-in-early-and-late-cantonese-mandarin-bilinguals
#20
Xiaojin Liu, Liu Tu, Junjing Wang, Bo Jiang, Wei Gao, Ximin Pan, Meng Li, Miao Zhong, Zhenzhen Zhu, Meiqi Niu, Yanyan Li, Ling Zhao, Xiaoxi Chen, Chang Liu, Zhi Lu, Ruiwang Huang
Early second language (L2) experience influences the neural organization of L2 in neuro-plastic terms. Previous studies tried to reveal these plastic effects of age of second language acquisition (AoA-L2) and proficiency-level in L2 (PL-L2) on the neural basis of language processing in bilinguals. Although different activation patterns have been observed during language processing in early and late bilinguals by task-fMRI, few studies reported the effect of AoA-L2 and high PL-L2 on language network at resting state...
November 2017: Brain and Language
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