nap News24.com | Pirates kidnap 6 crewmen from 2 fishing boats off Gabon: source By www.news24.com Published On :: Tue, 05 May 2020 11:20:38 +0200 Pirates have attacked two fishing vessels near the Gabonese capital Libreville, abducting six crewmen, a source close to the Gabonese government told AFP. Full Article
nap AT#190 - Travel to the Napa Valley in California's Wine Country By amateurtraveler.com Published On :: Sun, 19 Jul 2009 01:56:25 +0000 The Amateur Traveler talks to Carole Terwilliger Meyers the author of Weekend Adventures in San Francisco and Northern California. Carole comes on the show to talk about California’s traditional wine country of Napa and Sonoma Valleys. This episode focuses primarily on the Napa Valley and the many wineries that can be found there. We explore recreated castles, wine tasting , tours as well as other none wine related sites like mud baths, petrified forests, and the CIA (The Culinary Institute). We talk about restaurants and hotels, picnics and the wine train. Whether you are a connoisseur, a foodie or just a tourist, the Napa Valley has much to offer. Full Article
nap AT#492 - Trekking the Annapurna Circuit in Nepal By asia.amateurtraveler.com Published On :: Sat, 28 Nov 2015 15:30:00 +0000 Hear about Trekking the Annapurna Circuit in Nepal as the Amateur Traveler talks to the Su Family from sufamilyadventures.com about tackling this well known route. Full Article
nap AT#498 - Travel to Indianapolis, Indiana By usa.amateurtraveler.com Published On :: Sat, 16 Jan 2016 15:00:00 +0000 Hear about travel to Indianapolis, Indiana as the Amateur Traveler talked to Nancy Parode the Senior Travel Expert at about.com about travel to this mid-western capital. Full Article
nap AT#514 - Naples and the Amalfi Coast, Italy By europe.amateurtraveler.com Published On :: Sat, 14 May 2016 14:00:00 +0000 Hear about travel to Naples and the Amalfi Coast in Italy as the Amateur Traveler talks to Beth Rubin from SelectItaly.com about how to plan a trip to this beautiful region. Full Article
nap AT#527 - Travel to Napa and Sonoma, California (replay) By usa.amateurtraveler.com Published On :: Sat, 11 Nov 2017 15:00:00 +0000 Hear about travel to California's premier wine region of Napa and Sonoma as the Amateur Traveler talks again to free lance journalist Jill Robinson about this area with more than just wine... but a lot of that Full Article
nap Global Identification and Characterization of Both O-GlcNAcylation and Phosphorylation at the Murine Synapse By feedproxy.google.com Published On :: 2012-08-01 Jonathan C. TrinidadAug 1, 2012; 11:215-229Research Full Article
nap Strengthening National Accountability and Preparedness for Global Health Security (SNAP-GHS) By feedproxy.google.com Published On :: Thu, 19 Dec 2019 15:43:55 +0000 The project aims to identify the enablers and barriers to enhance data use by National Public Health Institutes (NPHIs), producing outputs that will facilitate strengthening of the role of NPHIs in monitoring potential public health threats, and in shaping and informing domestic policies on health security and preparedness. Global health security is underpinned by the actions taken at a national level to ensure capacities exist to sufficiently prepare for and respond to acute threats and crises. In many contexts, National Public Health Institutes (NPHIs) were first established because of, and in response to, specific public health challenges typically related to infectious diseases.The Strengthening National Accountability and Preparedness for Global Health Security (SNAP-GHS) project evolved from a series of roundtables and discussions hosted by the Centre on Global Health Security at Chatham House, in collaboration with the Graduate Institute of Geneva.The outcome of the project is a SNAP-GHS Toolkit to support NPHIs in better diagnosing and understanding the challenges to data use within their own institutes, as well as in relation to external stakeholders and agencies. The toolkit is intended to be used for further circulation and dissemination by the International Association of National Public Health Institutes (IANPHI).The project is led by the Centre on Global Health Security at Chatham House in collaboration with the Ethiopian Public Health Institute, the Nigeria Centre for Disease Control, and the National Institute for Health in Pakistan. Full Article
nap CBD News: The ecologically or biologically significant marine areas (EBSA) booklet series provide snapshot summaries of the pages upon pages of data compiled by participating experts, to provide an inspiring overview of some of the most ecologically or bi By www.cbd.int Published On :: Fri, 22 Jun 2018 00:00:00 GMT Full Article
nap Episode 51 - The Internet of Sick Burns (IoSB) Snapchat IPO, Android Wear 2.0 and Apple in India By play.acast.com Published On :: Fri, 10 Feb 2017 11:20:46 GMT Techworld Editor Charlotte Jee conducts the tech orchestra this week, trying to get a tune out of this cold, creaking week. Online Editor at Computerworld UK Scott Carey lets us know all about Snapchat's upcoming IPO, billions of dollars, and the gang comes to the realisation they'll perhaps never understand what it's for. Then Senior Staff Writer at PC Advisor Henry Burrell recaps on Google and LG's launch of Android Wear 2.0 and ask - frankly - is it a big deal? Finally Acting Editor at Macworld UK David Price discusses Apple's rumoured plans to move manufacturing to India, which inevitably moves us on to Tech Trumps. See acast.com/privacy for privacy and opt-out information. Full Article tech technology snapchat pod podcast IPO Google Android Wear 2.0 smartwatches Apple Donald Trump
nap Snapshots of American Dentistry By www.ada.org Published On :: Mon, 20 Jan 2020 00:00:00 -0600 Average educational indebtedness of graduating students from U.S. dental schools has increased an average of 3.5% annually between 2000 and 2018 after adjusting for inflation. Full Article
nap Snapshots of American Dentistry By www.ada.org Published On :: Mon, 03 Feb 2020 00:00:00 -0600 International dental school graduates in U.S. dental schools Full Article
nap Snapshots of American Dentistry By www.ada.org Published On :: Mon, 17 Feb 2020 00:00:00 -0600 Advanced dental education program enrollment by gender Full Article
nap Snapshots of American Dentistry By www.ada.org Published On :: Mon, 16 Mar 2020 00:00:00 -0500 Allied dental vs predoctoral dental graduates Full Article
nap Snapshots of American Dentistry By www.ada.org Published On :: Mon, 04 May 2020 13:52:00 -0500 Full Article
nap PROactive: A Sad Tale of Inappropriate Analysis and Unjustified Interpretation By clinical.diabetesjournals.org Published On :: 2006-04-01 Jay S. SkylerApr 1, 2006; 24:63-65Commentary Full Article
nap Revisiting the forum non-convenience and inappropriate forum / paper presented by Dr Ricky J. Lee, Globalex Tax & Legal. By www.catalog.slsa.sa.gov.au Published On :: Full Article
nap [Anaphora of Our Lady by St. Cyriacus of Behnesa] By search.wellcomelibrary.org Published On :: 18th - 19th century. Full Article
nap François-Charles-Joseph Bonaparte, King of Rome, as a boy. Engraving by W. Bromley, 1830, after Sir T. Lawrence. By feedproxy.google.com Published On :: Full Article
nap François-Charles-Joseph Bonaparte, King of Rome, as a boy. Engraving by W. Bromley, 1830, after Sir T. Lawrence. By feedproxy.google.com Published On :: London (3 Haymarket) : Published ... by W.B. Tiffin, June 21st 1830. Full Article
nap Synaptic Specificity and Application of Anterograde Transsynaptic AAV for Probing Neural Circuitry By www.jneurosci.org Published On :: 2020-04-15 Brian ZinggApr 15, 2020; 40:3250-3267Systems/Circuits Full Article
nap Circuit Stability to Perturbations Reveals Hidden Variability in the Balance of Intrinsic and Synaptic Conductances By www.jneurosci.org Published On :: 2020-04-15 Sebastian OnaschApr 15, 2020; 40:3186-3202Systems/Circuits Full Article
nap Gamma Oscillation by Synaptic Inhibition in a Hippocampal Interneuronal Network Model By www.jneurosci.org Published On :: 1996-10-15 Xiao-Jing WangOct 15, 1996; 16:6402-6413Articles Full Article
nap Three-dimensional structure of dendritic spines and synapses in rat hippocampus (CA1) at postnatal day 15 and adult ages: implications for the maturation of synaptic physiology and long-term potentiation [published erratum appears in J Neurosci 1992 Aug;1 By www.jneurosci.org Published On :: 1992-07-01 KM HarrisJul 1, 1992; 12:2685-2705Articles Full Article
nap Quantitative Ultrastructural Analysis of Hippocampal Excitatory Synapses By www.jneurosci.org Published On :: 1997-08-01 Thomas SchikorskiAug 1, 1997; 17:5858-5867Articles Full Article
nap High-Level Neuronal Expression of A{beta}1-42 in Wild-Type Human Amyloid Protein Precursor Transgenic Mice: Synaptotoxicity without Plaque Formation By www.jneurosci.org Published On :: 2000-06-01 Lennart MuckeJun 1, 2000; 20:4050-4058Cellular Full Article
nap Synaptic Modifications in Cultured Hippocampal Neurons: Dependence on Spike Timing, Synaptic Strength, and Postsynaptic Cell Type By www.jneurosci.org Published On :: 1998-12-15 Guo-qiang BiDec 15, 1998; 18:10464-10472Articles Full Article
nap Integration of Swimming-Related Synaptic Excitation and Inhibition by olig2+ Eurydendroid Neurons in Larval Zebrafish Cerebellum By www.jneurosci.org Published On :: 2020-04-08T09:30:18-07:00 The cerebellum influences motor control through Purkinje target neurons, which transmit cerebellar output. Such output is required, for instance, for larval zebrafish to learn conditioned fictive swimming. The output cells, called eurydendroid neurons (ENs) in teleost fish, are inhibited by Purkinje cells and excited by parallel fibers. Here, we investigated the electrophysiological properties of glutamatergic ENs labeled by the transcription factor olig2. Action potential firing and synaptic responses were recorded in current clamp and voltage clamp from olig2+ neurons in immobilized larval zebrafish (before sexual differentiation) and were correlated with motor behavior by simultaneous recording of fictive swimming. In the absence of swimming, olig2+ ENs had basal firing rates near 8 spikes/s, and EPSCs and IPSCs were evident. Comparing Purkinje firing rates and eurydendroid IPSC rates indicated that 1-3 Purkinje cells converge onto each EN. Optogenetically suppressing Purkinje simple spikes, while preserving complex spikes, suggested that eurydendroid IPSC size depended on presynaptic spike duration rather than amplitude. During swimming, EPSC and IPSC rates increased. Total excitatory and inhibitory currents during sensory-evoked swimming were both more than double those during spontaneous swimming. During both spontaneous and sensory-evoked swimming, the total inhibitory current was more than threefold larger than the excitatory current. Firing rates of ENs nevertheless increased, suggesting that the relative timing of IPSCs and EPSCs may permit excitation to drive additional eurydendroid spikes. The data indicate that olig2+ cells are ENs whose activity is modulated with locomotion, suiting them to participate in sensorimotor integration associated with cerebellum-dependent learning. SIGNIFICANCE STATEMENT The cerebellum contributes to movements through signals generated by cerebellar output neurons, called eurydendroid neurons (ENs) in fish (cerebellar nuclei in mammals). ENs receive sensory and motor signals from excitatory parallel fibers and inhibitory Purkinje cells. Here, we report electrophysiological recordings from ENs of larval zebrafish that directly illustrate how synaptic inhibition and excitation are integrated by cerebellar output neurons in association with motor behavior. The results demonstrate that inhibitory and excitatory drive both increase during fictive swimming, but inhibition greatly exceeds excitation. Firing rates nevertheless increase, providing evidence that synaptic integration promotes cerebellar output during locomotion. The data offer a basis for comparing aspects of cerebellar coding that are conserved and that diverge across vertebrates. Full Article
nap Synaptic Specificity and Application of Anterograde Transsynaptic AAV for Probing Neural Circuitry By www.jneurosci.org Published On :: 2020-04-15T09:30:18-07:00 Revealing the organization and function of neural circuits is greatly facilitated by viral tools that spread transsynaptically. Adeno-associated virus (AAV) exhibits anterograde transneuronal transport, however, the synaptic specificity of this spread and its broad application within a diverse set of circuits remains to be explored. Here, using anatomic, functional, and molecular approaches, we provide evidence for the preferential transport of AAV1 to postsynaptically connected neurons and reveal its spread is strongly dependent on synaptic transmitter release. In addition to glutamatergic pathways, AAV1 also spreads through GABAergic synapses to both excitatory and inhibitory cell types. We observed little or no transport, however, through neuromodulatory projections (e.g., serotonergic, cholinergic, and noradrenergic). In addition, we found that AAV1 can be transported through long-distance descending projections from various brain regions to effectively transduce spinal cord neurons. Combined with newly designed intersectional and sparse labeling strategies, AAV1 can be applied within a wide variety of pathways to categorize neurons according to their input sources, morphology, and molecular identities. These properties make AAV1 a promising anterograde transsynaptic tool for establishing a comprehensive cell-atlas of the brain, although its capacity for retrograde transport currently limits its use to unidirectional circuits. SIGNIFICANCE STATEMENT The discovery of anterograde transneuronal spread of AAV1 generates great promise for its application as a unique tool for manipulating input-defined cell populations and mapping their outputs. However, several outstanding questions remain for anterograde transsynaptic approaches in the field: (1) whether AAV1 spreads exclusively or specifically to synaptically connected neurons, and (2) how broad its application could be in various types of neural circuits in the brain. This study provides several lines of evidence in terms of anatomy, functional innervation, and underlying mechanisms, to strongly support that AAV1 anterograde transneuronal spread is highly synapse specific. In addition, several potentially important applications of transsynaptic AAV1 in probing neural circuits are described. Full Article
nap Circuit Stability to Perturbations Reveals Hidden Variability in the Balance of Intrinsic and Synaptic Conductances By www.jneurosci.org Published On :: 2020-04-15T09:30:18-07:00 Neurons and circuits each with a distinct balance of intrinsic and synaptic conductances can generate similar behavior but sometimes respond very differently to perturbation. Examining a large family of circuit models with non-identical neurons and synapses underlying rhythmic behavior, we analyzed the circuits' response to modifications in single and multiple intrinsic conductances in the individual neurons. To summarize these changes over the entire range of perturbed parameters, we quantified circuit output by defining a global stability measure. Using this measure, we identified specific subsets of conductances that when perturbed generate similar behavior in diverse individuals of the population. Our unbiased clustering analysis enabled us to quantify circuit stability when simultaneously perturbing multiple conductances as a nonlinear combination of single conductance perturbations. This revealed surprising conductance combinations that can predict the response to specific perturbations, even when the remaining intrinsic and synaptic conductances are unknown. Therefore, our approach can expose hidden variability in the balance of intrinsic and synaptic conductances of the same neurons across different versions of the same circuit solely from the circuit response to perturbations. Developed for a specific family of model circuits, our quantitative approach to characterizing high-dimensional degenerate systems provides a conceptual and analytic framework to guide future theoretical and experimental studies on degeneracy and robustness. SIGNIFICANCE STATEMENT Neural circuits can generate nearly identical behavior despite neuronal and synaptic parameters varying several-fold between individual instantiations. Yet, when these parameters are perturbed through channel deletions and mutations or environmental disturbances, seemingly identical circuits can respond very differently. What distinguishes inconsequential perturbations that barely alter circuit behavior from disruptive perturbations that drastically disturb circuit output remains unclear. Focusing on a family of rhythmic circuits, we propose a computational approach to reveal hidden variability in the intrinsic and synaptic conductances in seemingly identical circuits based solely on circuit output to different perturbations. We uncover specific conductance combinations that work similarly to maintain stability and predict the effect of changing multiple conductances simultaneously, which often results from neuromodulation or injury. Full Article
nap Selective Disruption of Inhibitory Synapses Leading to Neuronal Hyperexcitability at an Early Stage of Tau Pathogenesis in a Mouse Model By www.jneurosci.org Published On :: 2020-04-22T09:29:41-07:00 Synaptic dysfunction provoking dysregulated cortical neural circuits is currently hypothesized as a key pathophysiological process underlying clinical manifestations in Alzheimer's disease and related neurodegenerative tauopathies. Here, we conducted PET along with postmortem assays to investigate time course changes of excitatory and inhibitory synaptic constituents in an rTg4510 mouse model of tauopathy, which develops tau pathologies leading to noticeable brain atrophy at 5-6 months of age. Both male and female mice were analyzed in this study. We observed that radiosignals derived from [11C]flumazenil, a tracer for benzodiazepine receptor, in rTg4510 mice were significantly lower than the levels in nontransgenic littermates at 2-3 months of age. In contrast, retentions of (E)-[11C]ABP688, a tracer for mGluR5, were unaltered relative to controls at 2 months of age but then gradually declined with aging in parallel with progressive brain atrophy. Biochemical and immunohistochemical assessment of postmortem brain tissues demonstrated that inhibitory, but not excitatory, synaptic constituents selectively diminished without overt loss of somas of GABAergic interneurons in the neocortex and hippocampus of rTg4510 mice at 2 months of age, which was concurrent with enhanced immunoreactivity of cFos, a well-characterized immediate early gene, suggesting that impaired inhibitory neurotransmission may cause hyperexcitability of cortical circuits. Our findings indicate that tau-induced disruption of the inhibitory synapse may be a critical trigger of progressive neurodegeneration, resulting in massive neuronal loss, and PET assessments of inhibitory versus excitatory synapses potentially offer in vivo indices for hyperexcitability and excitotoxicity early in the etiologic pathway of neurodegenerative tauopathies. SIGNIFICANCE STATEMENT In this study, we examined the in vivo status of excitatory and inhibitory synapses in the brain of the rTg4510 tauopathy mouse model by PET imaging with (E)-[11C]ABP688 and [11C]flumazenil, respectively. We identified inhibitory synapse as being significantly dysregulated before brain atrophy at 2 months of age, while excitatory synapse stayed relatively intact at this stage. In line with this observation, postmortem assessment of brain tissues demonstrated selective attenuation of inhibitory synaptic constituents accompanied by the upregulation of cFos before the formation of tau pathology in the forebrain at young ages. Our findings indicate that selective degeneration of inhibitory synapse with hyperexcitability in the cortical circuit constitutes the critical early pathophysiology of tauopathy. Full Article
nap Nitric Oxide Signaling Strengthens Inhibitory Synapses of Cerebellar Molecular Layer Interneurons through a GABARAP-Dependent Mechanism By www.jneurosci.org Published On :: 2020-04-22T09:29:41-07:00 Nitric oxide (NO) is an important signaling molecule that fulfills diverse functional roles as a neurotransmitter or diffusible second messenger in the developing and adult CNS. Although the impact of NO on different behaviors such as movement, sleep, learning, and memory has been well documented, the identity of its molecular and cellular targets is still an area of ongoing investigation. Here, we identify a novel role for NO in strengthening inhibitory GABAA receptor-mediated transmission in molecular layer interneurons of the mouse cerebellum. NO levels are elevated by the activity of neuronal NO synthase (nNOS) following Ca2+ entry through extrasynaptic NMDA-type ionotropic glutamate receptors (NMDARs). NO activates protein kinase G with the subsequent production of cGMP, which prompts the stimulation of NADPH oxidase and protein kinase C (PKC). The activation of PKC promotes the selective strengthening of α3-containing GABAARs synapses through a GABA receptor-associated protein-dependent mechanism. Given the widespread but cell type-specific expression of the NMDAR/nNOS complex in the mammalian brain, our data suggest that NMDARs may uniquely strengthen inhibitory GABAergic transmission in these cells through a novel NO-mediated pathway. SIGNIFICANCE STATEMENT Long-term changes in the efficacy of GABAergic transmission is mediated by multiple presynaptic and postsynaptic mechanisms. A prominent pathway involves crosstalk between excitatory and inhibitory synapses whereby Ca2+-entering through postsynaptic NMDARs promotes the recruitment and strengthening of GABAA receptor synapses via Ca2+/calmodulin-dependent protein kinase II. Although Ca2+ transport by NMDARs is also tightly coupled to nNOS activity and NO production, it has yet to be determined whether this pathway affects inhibitory synapses. Here, we show that activation of NMDARs trigger a NO-dependent pathway that strengthens inhibitory GABAergic synapses of cerebellar molecular layer interneurons. Given the widespread expression of NMDARs and nNOS in the mammalian brain, we speculate that NO control of GABAergic synapse efficacy may be more widespread than has been appreciated. Full Article
nap Carbon Monoxide, a Retrograde Messenger Generated in Postsynaptic Mushroom Body Neurons, Evokes Noncanonical Dopamine Release By www.jneurosci.org Published On :: 2020-04-29T09:30:19-07:00 Dopaminergic neurons innervate extensive areas of the brain and release dopamine (DA) onto a wide range of target neurons. However, DA release is also precisely regulated. In Drosophila melanogaster brain explant preparations, DA is released specifically onto α3/α'3 compartments of mushroom body (MB) neurons that have been coincidentally activated by cholinergic and glutamatergic inputs. The mechanism for this precise release has been unclear. Here we found that coincidentally activated MB neurons generate carbon monoxide (CO), which functions as a retrograde signal evoking local DA release from presynaptic terminals. CO production depends on activity of heme oxygenase in postsynaptic MB neurons, and CO-evoked DA release requires Ca2+ efflux through ryanodine receptors in DA terminals. CO is only produced in MB areas receiving coincident activation, and removal of CO using scavengers blocks DA release. We propose that DA neurons use two distinct modes of transmission to produce global and local DA signaling. SIGNIFICANCE STATEMENT Dopamine (DA) is needed for various higher brain functions, including memory formation. However, DA neurons form extensive synaptic connections, while memory formation requires highly specific and localized DA release. Here we identify a mechanism through which DA release from presynaptic terminals is controlled by postsynaptic activity. Postsynaptic neurons activated by cholinergic and glutamatergic inputs generate carbon monoxide, which acts as a retrograde messenger inducing presynaptic DA release. Released DA is required for memory-associated plasticity. Our work identifies a novel mechanism that restricts DA release to the specific postsynaptic sites that require DA during memory formation. Full Article
nap Calcineurin Inhibition Causes {alpha}2{delta}-1-Mediated Tonic Activation of Synaptic NMDA Receptors and Pain Hypersensitivity By www.jneurosci.org Published On :: 2020-05-06T09:30:22-07:00 Calcineurin inhibitors, such as tacrolimus (FK506) and cyclosporine, are widely used as standard immunosuppressants in organ transplantation recipients. However, these drugs can cause severe pain in patients, commonly referred to as calcineurin inhibitor-induced pain syndrome (CIPS). Although calcineurin inhibition increases NMDAR activity in the spinal cord, the underlying mechanism remains enigmatic. Using an animal model of CIPS, we found that systemic administration of FK506 in male and female mice significantly increased the amount of α2-1–GluN1 complexes in the spinal cord and the level of α2-1–bound GluN1 proteins in spinal synaptosomes. Treatment with FK506 significantly increased the frequency of mEPSCs and the amplitudes of monosynaptic EPSCs evoked from the dorsal root and puff NMDAR currents in spinal dorsal horn neurons. Inhibiting α2-1 with gabapentin or disrupting the α2-1–NMDAR interaction with α2-1Tat peptide completely reversed the effects of FK506. In α2-1 gene KO mice, treatment with FK506 failed to increase the frequency of NMDAR-mediated mEPSCs and the amplitudes of evoked EPSCs and puff NMDAR currents in spinal dorsal horn neurons. Furthermore, systemic administration of gabapentin or intrathecal injection of α2-1Tat peptide reversed thermal and mechanical hypersensitivity in FK506-treated mice. In addition, genetically deleting GluN1 in dorsal root ganglion neurons or α2-1 genetic KO similarly attenuated FK506-induced thermal and mechanical hypersensitivity. Together, our findings indicate that α2-1–bound NMDARs mediate calcineurin inhibitor-induced tonic activation of presynaptic and postsynaptic NMDARs at the spinal cord level and that presynaptic NMDARs play a prominent role in the development of CIPS. SIGNIFICANCE STATEMENT Calcineurin inhibitors are immunosuppressants used to prevent rejection of transplanted organs and tissues. However, these drugs can cause severe, unexplained pain. We showed that calcineurin inhibition enhances physical interaction between α2-1 and NMDARs and their synaptic trafficking in the spinal cord. α2-1 is essential for calcineurin inhibitor-induced aberrant activation of presynaptic and postsynaptic NMDARs in the spinal cord. Furthermore, inhibiting α2-1 or disrupting α2-1–NMDAR interaction reduces calcineurin inhibitor-induced pain hypersensitivity. Eliminating NMDARs in primary sensory neurons or α2-1 KO also attenuates calcineurin inhibitor-induced pain hypersensitivity. This new information extends our mechanistic understanding of the role of endogenous calcineurin in regulating synaptic plasticity and nociceptive transmission and suggests new strategies for treating this painful condition. Full Article
nap M-Current Inhibition in Hippocampal Excitatory Neurons Triggers Intrinsic and Synaptic Homeostatic Responses at Different Temporal Scales By www.jneurosci.org Published On :: 2020-05-06T09:30:22-07:00 Persistent alterations in neuronal activity elicit homeostatic plastic changes in synaptic transmission and/or intrinsic excitability. However, it is unknown whether these homeostatic processes operate in concert or at different temporal scales to maintain network activity around a set-point value. Here we show that chronic neuronal hyperactivity, induced by M-channel inhibition, triggered intrinsic and synaptic homeostatic plasticity at different timescales in cultured hippocampal pyramidal neurons from mice of either sex. Homeostatic changes of intrinsic excitability occurred at a fast timescale (1–4 h) and depended on ongoing spiking activity. This fast intrinsic adaptation included plastic changes in the threshold current and a distal relocation of FGF14, a protein physically bridging Nav1.6 and Kv7.2 channels along the axon initial segment. In contrast, synaptic adaptations occurred at a slower timescale (~2 d) and involved decreases in miniature EPSC amplitude. To examine how these temporally distinct homeostatic responses influenced hippocampal network activity, we quantified the rate of spontaneous spiking measured by multielectrode arrays at extended timescales. M-Channel blockade triggered slow homeostatic renormalization of the mean firing rate (MFR), concomitantly accompanied by a slow synaptic adaptation. Thus, the fast intrinsic adaptation of excitatory neurons is not sufficient to account for the homeostatic normalization of the MFR. In striking contrast, homeostatic adaptations of intrinsic excitability and spontaneous MFR failed in hippocampal GABAergic inhibitory neurons, which remained hyperexcitable following chronic M-channel blockage. Our results indicate that a single perturbation such as M-channel inhibition triggers multiple homeostatic mechanisms that operate at different timescales to maintain network mean firing rate. SIGNIFICANCE STATEMENT Persistent alterations in synaptic input elicit homeostatic plastic changes in neuronal activity. Here we show that chronic neuronal hyperexcitability, induced by M-type potassium channel inhibition, triggered intrinsic and synaptic homeostatic plasticity at different timescales in hippocampal excitatory neurons. The data indicate that the fast adaptation of intrinsic excitability depends on ongoing spiking activity but is not sufficient to provide homeostasis of the mean firing rate. Our results show that a single perturbation such as M-channel inhibition can trigger multiple homeostatic processes that operate at different timescales to maintain network mean firing rate. Full Article
nap How Napalm Bombs Intensified U.S. Attacks During WWII By www.smithsonianmag.com Published On :: Thu, 30 Aug 2018 12:00:00 +0000 Bombing ground targets from the air is tricky and not always accurate. But a new type of bomb creates an unimaginable level of destruction Full Article
nap A Tour of Beauty Industry Pioneer Madam C.J. Walker’s Indianapolis By www.smithsonianmag.com Published On :: Tue, 17 Mar 2020 15:44:19 +0000 The hair-care magnate at the center of the new Netflix series 'Self Made' left her imprint on the city where she launched her career Full Article
nap Who Killed Keylan Knapp? By www.nytimes.com Published On :: Sat, 28 Mar 2020 18:30:07 GMT My childhood friend has joined America’s “deaths of despair.” Full Article
nap Blood of St. Januarius liquefies in Naples under lockdown By feedproxy.google.com Published On :: Sun, 03 May 2020 08:30:00 -0600 Rome Newsroom, May 3, 2020 / 08:30 am (CNA).- The liquefaction of the blood of the early Church martyr St. Januarius occurred Saturday amid the coronavirus lockdown, leading the Archbishop of Naples to bless the city with the miraculous relic. “Dear friends, I have a big announcement to make: even in this time of coronavirus, the Lord through the intercession of St. Januarius has liquified the blood!" Cardinal Crescenzio Sepe said May 2. Cardinal Sepe, the Archbishop of Naples, offered a Mass via video livestream from the Cathedral of the Assumption of Mary to celebrate the recurring miracle, and then used the relic of the liquified blood to bless the city. “How many times our saint has intervened to save us from the plague, from cholera. St. Januarius is the true soul of Naples,” he said in his homily. St. Januarius, or San Gennaro in Italian, the patron of Naples, was a bishop of the city in the third century, whose bones and blood are preserved in the cathedral as relics. He is believed to have been martyred during Diocletian persecution. The reputed miracle is locally known and accepted, though has not been the subject of official Church recognition. The liquefaction reportedly happens at least three times a year: Sept. 19, the saint's feast day, the Saturday before the first Sunday of May, and Dec. 16, the anniversary of the 1631 eruption of Mount Vesuvius. During the miracle, the dried, red-colored mass confined to one side of the reliquary becomes blood that covers the entire glass. In local lore, the failure of the blood to liquefy signals war, famine, disease or other disaster. “Naples has never given up in the face of the misfortunes that have affected it,” Sepe said. The cardinal praised the health care workers who are serving those infected by the coronavirus in the city. Naples is the capital of the region of Campania, where 4,459 people have been documented with COVID-19 by the Italian Ministry of Health. “But there is another possible epidemic that worries me in the most dangerous neighborhoods in the city," Sepe said, referring to the Camorra, the Neapolitan mafia. “There are those who are good at making a fortune in times of epidemic. … Let’s move, intervene immediately, because the underworld is faster than our bureaucracy. The Camorra does not wait. It is up to us to get rid of all [criminal] organizations. We must overcome and affirm the right to hope,” the cardinal said. Amid Italy’s lockdown, anti-mafia experts have warned that Italy’s criminal organizations could take advantage of the redirection of police resources, and profit from the government stimulus that could inadvertently fund mafia-controlled industries. The coronavirus lockdown also prevented the traditional procession for the miracle of St. Januarius from taking place. This procession had even continued in Naples during World War II, according to ACI Stampa. Public Masses have not been allowed in Italy for the past eight weeks under the country’s coronavirus restrictions. The president of the Italian bishops’ conference, Cardinal Gualtiero Bassetti said May 2 that the bishops had reached an agreement with the government, and that he expects public Masses to resume “in the coming weeks” if the infection curve flattens. “As a Church, we have certainly shared in suffering the limitations imposed to protect the health of all,” he said. Full Article Europe
nap Randomized Trial of Sumatriptan and Naproxen Sodium Combination in Adolescent Migraine By pediatrics.aappublications.org Published On :: 2012-05-14T00:07:40-07:00 Treatment of adolescent migraine remains a significant unmet medical need. In adults, the combination of sumatriptan and naproxen sodium has demonstrated superior efficacy, with similar tolerability, to its components in the acute treatment of migraine.This study constitutes the first large-scale, placebo-controlled evidence for the acute relief of adolescent migraine pain and associated symptoms with an oral medication. (Read the full article) Full Article
nap Galactose-{alpha}-1,3-galactose and Delayed Anaphylaxis, Angioedema, and Urticaria in Children By pediatrics.aappublications.org Published On :: 2013-04-08T00:06:53-07:00 Delayed anaphylaxis, urticaria, and angioedema to mammalian meat products were first described in the adult population in 2009. Patients with this syndrome who consume mammalian meat typically develop symptoms 4 to 6 hours after ingestion.Specific diagnoses for children who develop urticaria, angioedema, and idiopathic anaphylaxis are few and far between. We have now shown delayed anaphylaxis, urticaria, and angioedema due to mammalian meat products in the pediatric population. (Read the full article) Full Article
nap Inappropriate Use of Ultrasound in Management of Pediatric Cryptorchidism By pediatrics.aappublications.org Published On :: 2015-08-10T00:07:46-07:00 The value of ultrasound imaging for the diagnosis, prognosis, and surgical planning of cryptorchidism is limited at best.Ultrasound remains grossly overused by referring physicians throughout Ontario, Canada, which resulted in a 3-month delay to definitive surgery and unnecessary expenditures. (Read the full article) Full Article
nap Barcelona v Napoli facts By www.uefa.com Published On :: Fri, 28 Feb 2020 14:00:00 GMT Antoine Griezmann's first-leg away goal has given Barcelona an advantage after the game in Naples finished 1-1. Full Article comp_matches
nap Fujitsu ScanSnap iX1500 By www.pcmag.com Published On :: The Fujitsu ScanSnap iX1500 is a well-built, accurate, and easy-to-use entry-level sheet-fed document scanner for home and small-office use. Full Article
nap Colombian kidnapping victim says God is faithful By feedproxy.google.com Published On :: Fri, 03 Apr 2020 04:04:00 -0600 Bogotá, Colombia, Apr 3, 2020 / 04:04 am (CNA).- Diana María Toro Vélez was kidnapped on a September day, as she drove home from Mass in the Colombian city where she lived. She spent 453 days in captivity. And she says that God’s grace kept her hope alive during the ordeal. “I left Mass one Thursday and was driving home in my car and when I got home they assaulted me. They asked me a few questions and took me away. They sold me to the guerrillas,” Toro told ACI Prensa, CNA’s Spanish language news partner. Toro, the mother of three, told ACI Prensa that during her captivity, she was sometimes forced to march a lot, one time for up to 15 days in a row. “I clung to God. I cried and prayed a lot. I really held fast to God. I taught the kidnappers how to read and write. We prayed. There was a certain coexistence, and good things came out of the bad,” she said. Toro, 41, was kidnapped Sept. 27, 2018, in Amagá, about an hour’s drive from Medellin. Her captors were criminals, members of a gang called “The Sorcerers,” who handed her over to Marxist guerrillas from the the National Liberation Army (ELN) for 48M pesos, about $12,000. The ELN reportedly asked 3 billion pesos, about $745,000 for her return. Toro was released from captivity on Christmas Eve, 2019. The Catholic Church in Colombia had appealed for her release, and the release appeared to be a goodwill gesture toward achieving some kind of peace agreement between the ELN and the country’s government. Public officials credited the Church with arranging the release. Speaking to ACI Prensa, the young mom said that she was “very devoted to Our Lady of Guadalupe. When I was kidnapped I made a rosary and prayed it every day, praying a lot to the Virgin that she would allow me to be returned to my children. And God heard me, because I was released on Dec. 24, 2019.” It was difficult, Toro said, to be “separated from my three children, one of them 3, another 4 and one 14 years old. Separated from my husband, my parents, my siblings, my family members, relatives and friends.” “These were 453 days of anxiety, grief, sadness and despair. 453 days of living in the middle of the jungle, sleeping under a canopy, on branches, with snakes, scorpions, mosquitos and many other animals around,” she said. Toro told ACI Prensa she subsisted on parrot, pasta, cooked banana, and rice. She had only two sets of clothes and infrequently bathed. “These were really hard days without knowing anything about my family, just with the certainty that God was with me, filling me daily with his strength and fortitude and firmly believing that if I woke up okay, my family was okay too,” she said. “And God brought me out of that really hard situation. I saw that his glory and his mercy are immense.” Toro said the ordeal has filled her with gratitude. “I want to tell those people who in these times feel alone or in despair because of the situation we’re going through in Colombia and the entire world, that God is with us, he never has left us alone, especially now.” “Let’s pray the rosary, let’s pray as a family. The power of prayer is immense,” she added. This story was first published by ACI Prensa, CNA's Spanish-language news partner. It has been translated and adapted by CNA. Full Article Americas
nap Aid workers kidnapped in Iraq released By feedproxy.google.com Published On :: Fri, 27 Mar 2020 11:19:00 -0600 CNA Staff, Mar 27, 2020 / 11:19 am (CNA).- Four men working in Iraq for the French humanitarian organization SOS Chrétiens d'Orient who went missing in Baghdad in January have been released by their kidnappers, the French president announced Thursday. Emmanuel Macron announced March 26 that he “welcomes the release of our three nationals Antoine Brochon, Julien Dittmar, Alexandre Goodarzy and Iraqi Tariq Mattoka.” The men disappeared Jan. 20 after they made a trip to an appointment by car. SOS Chrétiens d'Orient tried to contact them the following day, unsuccessfully. The missing employees had gone to Baghdad “to renew their visas and the registration of association with the Iraqi authorities and to monitor the association's operations” in the country. Macron's office said it had made “every effort” to secure their release, and he expressed “gratitude to the Iraqi authorities for their co-operation.” SOS Chrétiens d'Orient said last week that they had received no ransom demand, and no group had claimed responsibility for the abduction. The organization works to support Eastern Christians with humanitarian material aid; it has permanent missions in Syria, Iraq, Lebanon, and Egypt. Christians in Iraq have suffered persecution in recent years, especially during the invasion of the Islamic State. Prior to the United States invasion of Iraq in 2003, there were about 1.5 million Iraqi Christians. Today, that number is believed to be fewer than 500,000. Full Article Middle East - Africa
nap AMD Looks to Shake Up the Data Center With 'Naples' By www.pcmag.com Published On :: The Naples processor is designed to compete with Intel's Xeon offerings for the data center. Full Article
nap Snap Unveils Pricey Spectacles 3 Designed for Rich Influencers By www.pcmag.com Published On :: After two unprofitable forays into augmented reality hardware, Snap is doubling down on its social camera eyewear with the $380 Spectacles 3 glasses featuring more 3D capabilities. Full Article