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https://www.readbyqxmd.com/read/28918226/chronic-central-oxytocin-infusion-impairs-sociability-in-mandarin-voles
#1
Peirong Du, Zhixiong He, Zhenlu Cai, Xin Hao, Na Dong, Wei Yuan, Wenjuan Hou, Jinfeng Yang, Rui Jia, Faodao Tai
Oxytocin (OT) has been reported to increase social contact, however some studies have related OT to reduced social contact, particularly with unfamiliar individuals. The underlying mechanisms of OT on social contact remain unclear. In this study, male mandarin vole (Microtus mandarinus), a socially monogamous rodent, was used as an animal model in which osmotic minipumps were used to intracerebroventricularly administer two continuous dosages of OT or saline for 12 consecutive days. We examined the effect of long-term OT treatment on social behavior, anxiety levels, and levels of oxytocin, vasopressin (AVP) and dopamine (DA) receptors, mRNA expression in the nucleus accumbens (NAcc), and medial amygdala (MeA)...
September 13, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28917552/crispr-correction-of-the-prkag2-gene-mutation-in-the-patient-s-ipsc-derived-cardiomyocytes-eliminates-the-electrophysiological-and-structural-abnormalities
#2
Ronen Ben Jehuda, Binyamin Eisen, Yuval Shemer, Lucy N Mekies, Agnes Szantai, Irina Reiter, Huanhuan Cui, Kaomei Guan, Shiraz Haron-Khun, Dov Freimark, Silke R Sperling, Mihaela Gherghiceanu, Michael Arad, Ofer Binah
BACKGROUND: Mutations in the PRKAG2 gene encoding the γ-subunit of adenosine monophosphate-kinase (AMPK) cause hypertrophic cardiomyopathy (HCM) and familial-Wolff-Parkinson-White syndrome (WPW). Patients carrying the R302Q mutation in PRKAG2 present sinus bradycardia, escape rhythms, ventricular pre-excitation, supraventricular tachycardia and atrioventricular block. This mutation affects AMPK activity and increases glycogen storage in cardiomyocytes. The link between glycogen storage, WPW, HCM and arrhythmias remains unknown...
September 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28912551/the-antipsychotic-drugs-olanzapine-and-haloperidol-modify-network-connectivity-and-spontaneous-activity-of-neural-networks-in-vitro
#3
Egor Dzyubenko, Georg Juckel, Andreas Faissner
Impaired neural synchronization is a hallmark of psychotic conditions such as schizophrenia. It has been proposed that schizophrenia-related cognitive deficits are caused by an unbalance of reciprocal inhibitory and stimulatory signaling. This supposedly leads to decreased power of induced gamma oscillations during the performance of cognitive tasks. In light of this hypothesis an efficient antipsychotic treatment should modify the connectivity and synchronization of local neural circuits. To address this issue, we investigated a model of hippocampal neuronal networks in vitro...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910592/optimization-of-process-condition-for-the-preparation-of-amine-impregnated-activated-carbon-developed-for-co2-capture-and-applied-to-methylene-blue-adsorption-by-response-surface-methodology
#4
Dipa Das, Bhim C Meikap
The present research describes the optimal adsorption condition for methylene blue (MB). The adsorbent used here was monoethanol amine-impregnated activated carbon (MEA-AC) prepared from green coconut shell. Response surface methodology (RSM) is the multivariate statistical technique used for the optimization of the process variables. The central composite design is used to determine the effect of activation temperature, activation time and impregnation ratio on the MB removal. The percentage (%) MB adsorption by MEA-AC is evaluated as a response of the system...
September 14, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28901394/overexpression-of-atp5b-promotes-cell-proliferation-in-asthma
#5
Jianhong Zuo, Mingsheng Lei, Meilin Wen, Yikun Chen, Zhigang Liu
Asthma is a complicated systemic disease of the airways, which is characterized by variable symptoms, including bronchial hyper‑responsive-ness, inflammation and airflow obstruction. The prevalence of asthma has increased 2‑3‑fold over recent decades in developed countries; however, the molecular mechanism of asthma remains unclear. In the current study, the expression of recombinant protein Dermatophagoides farinaeI (Derf I) was induced by isopropyl β‑D‑1‑thiogalactoside (IPTG) and purified using Ni‑NTA...
August 31, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28899032/mating-response-and-construction-of-heterothallic-strains-of-the-fission-yeast-schizosaccharomyces-octosporus
#6
Taisuke Seike, Hironori Niki
The fission yeast Schizosaccharomyces octosporus is one of four species in the genus Schizosaccharomyces. Recently released genome sequence data provide useful information for comparative studies. However, Sz. octosporus has not yet been genetically characterized because there have been no heterothallic strains of this species. Here we report the construction of stable heterothallic strains of Sz. octosporus for genetic crosses. First, we continuously observed the mating process of a homothallic strain, yFS286, and determined the mating frequency of Sz...
August 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28898153/diverticular-disease-of-the-terminal-ileum-mimics-cancer
#7
Nicholas Mea Hayward, Heung Chong, Robert Hagger
No abstract text is available yet for this article.
September 2, 2017: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/28883759/the-advantage-of-topographic-prominence-adopted-filter-for-the-detection-of-short-latency-spikes-of-retinal-ganglion-cells
#8
Jungryul Ahn, Myoung-Hwan Choi, Kwangsoo Kim, Solomon S Senok, Dong-Il Dan Cho, Kyo-In Koo, Yongsook Goo
Electrical stimulation through retinal prosthesis elicits both short and long-latency retinal ganglion cell (RGC) spikes. Because the short-latency RGC spike is usually obscured by electrical stimulus artifact, it is very important to isolate spike from stimulus artifact. Previously, we showed that topographic prominence (TP) discriminator based algorithm is valid and useful for artifact subtraction. In this study, we compared the performance of forward backward (FB) filter only vs. TP-adopted FB filter for artifact subtraction...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883222/temporal-changes-in-platelet-response-in-acute-coronary-syndrome-patients-with-prasugrel-and-clopidogrel-after-stent-implantation
#9
Antonio Tello-Montoliu, José Rivera, Diana Hernández, Ana Silvente, Eva Jover, Ana I Rodriguez, Miriam Quintana, Ana Romero, Esteban Orenes-Piñero, José Miguel Rivera-Caravaca, Francisco Marín, Andrea Veliz, Mariano Valdés
BACKGROUND: Prasugrel has been shown to provide more potency and less variability than clopidogrel, but its potential temporal variability has not been described.Methods and Results:We conducted a prospective open-label study, evaluating platelet reactivity overtime in acute coronary syndrome (ACS) patients on aspirin and clopidogrel (n=60) or prasugrel (n=61), after a percutaneous coronary intervention (PCI). Blood samples were taken at discharge and at 3 and 6 months. Platelet function tests included VerifyNow (VN-P2Y12), and Multiplate Aggregometry (MEA)...
September 6, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28880155/identification-of-ion-currents-components-generating-field-potential-recorded-in-mea-from-hipsc-cm
#10
Fabien Raphel, Muriel Boulakia, Nejib Zemzemi, Yves Coudiere, Jean-Michel Guillon, Philippe Zitoun, Jean-Frederic Gerbeau
Multi Electrodes Arrays (MEAs) combined with cardiomyocytes derived from human induced pluripotent stem cells (hiPSC-CMs) can enable high- or medium-throughput drug screening in safety pharmacology. This technology has recently attracted a lot of attention, in particular from an international initiative named CiPA. But it is currently limited by the difficulty to analyze the measured signals. We propose a strategy to analyze the signals acquired by the MEA and to automatically deduce the channels affected by the drug...
September 4, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28869690/highly-stretchable-compliant-polymeric-microelectrode-arrays-for-in-vivo-electrophysiological-interfacing
#11
Dianpeng Qi, Zhiyuan Liu, Yan Liu, Ying Jiang, Wan Ru Leow, Mayank Pal, Shaowu Pan, Hui Yang, Yu Wang, Xiaoqian Zhang, Jiancan Yu, Bin Li, Zhe Yu, Wei Wang, Xiaodong Chen
Polymeric microelectrode arrays (MEAs) are emerging as a new generation of biointegrated microelectrodes to transduce original electrochemical signals in living tissues to external electrical circuits, and vice versa. So far, the challenge of stretchable polymeric MEAs lies in the competition between high stretchability and good electrode-substrate adhesion. The larger the stretchability, the easier the delamination of electrodes from the substrate due to the mismatch in their Young's modulus. In this work, polypyrrole (PPy) electrode materials are designed, with PPy nanowires integrated on the high conductive PPy electrode arrays...
September 4, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28868212/high-density-mapping-of-brain-slices-using-a-large-multi-functional-high-density-cmos-microelectrode-array-system
#12
Vijay Viswam, Raziyeh Bounik, Amir Shadmani, Jelena Dragas, Marie Obien, Jan Müller, Yihui Chen, Andreas Hierlemann
We present a CMOS-based high-density microelectrode array (HD-MEA) system that enables high-density mapping of brain slices in-vitro with multiple readout modalities. The 4.48×2.43 mm(2) array consists of 59,760 micro-electrodes at 13.5 µm pitch (5487 electrodes/mm(2)). The overall system features 2048 action-potential, 32 local-field-potential and 32 current recording channels, 32 impedance-measurement and 28 neurotransmitter-detection channels and 16 voltage/current stimulation channels. The system enables real-time and label-free monitoring of position, size, morphology and electrical activity of brain slices...
June 2017: Int Solid State Sens Actuators Microsyst Conf
https://www.readbyqxmd.com/read/28859141/asporin-deficient-mice-have-tougher-skin-and-altered-skin-glycosaminoglycan-content-and-structure
#13
Marco Maccarana, René B Svensson, Anki Knutsson, Antonis Giannopoulos, Mea Pelkonen, MaryAnn Weis, David Eyre, Matthew Warman, Sebastian Kalamajski
The main structural component of connective tissues is fibrillar, cross-linked collagen whose fibrillogenesis can be modulated by Small Leucine-Rich Proteins/Proteoglycans (SLRPs). Not all SLRPs' effects on collagen and extracellular matrix in vivo have been elucidated; one of the less investigated SLRPs is asporin. Here we describe the successful generation of an Aspn-/- mouse model and the investigation of the Aspn-/- skin phenotype. Functionally, Aspn-/- mice had an increased skin mechanical toughness, although there were no structural changes present on histology or immunohistochemistry...
2017: PloS One
https://www.readbyqxmd.com/read/28856535/glua4-dependent-plasticity-mechanisms-contribute-to-developmental-synchronization-of-the-ca3-ca1-circuitry-in-the-hippocampus
#14
Tsvetomira Atanasova, Zoya Kharybina, Tiina Kaarela, Johanna Huupponen, Natalia V Luchkina, Tomi Taira, Sari E Lauri
During the course of development, molecular mechanisms underlying activity-dependent synaptic plasticity change considerably. At immature CA3-CA1 synapses in the hippocampus, PKA-driven synaptic insertion of GluA4 AMPA receptors is the predominant mechanism for synaptic strengthening. However, the physiological significance of the developmentally restricted GluA4-dependent plasticity mechanisms is poorly understood. Here we have used microelectrode array (MEA) recordings in GluA4 deficient slice cultures to study the role of GluA4 in early development of the hippocampal circuit function...
August 31, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28844883/heavy-metal-tolerance-traits-of-filamentous-fungi-isolated-from-gold-and-gemstone-mining-sites
#15
Oluwatosin Gbemisola Oladipo, Olusegun Olufemi Awotoye, Akinyemi Olayinka, Cornelius Carlos Bezuidenhout, Mark Steve Maboeta
Increased environmental pollution has necessitated the need for eco-friendly clean-up strategies. Filamentous fungal species from gold and gemstone mine site soils were isolated, identified and assessed for their tolerance to varied heavy metal concentrations of cadmium (Cd), copper (Cu), lead (Pb), arsenic (As) and iron (Fe). The identities of the fungal strains were determined based on the internal transcribed spacer 1 and 2 (ITS 1 and ITS 2) regions. Mycelia growth of the fungal strains were subjected to a range of (0-100 Cd), (0-1000 Cu), (0-400 Pb), (0-500 As) and (0-800 Fe) concentrations (mgkg(-1)) incorporated into malt extract agar (MEA) in triplicates...
August 8, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28842772/pdms-based-multielectrode-arrays-for-superior-in-vitro-retinal-stimulation-and-recording
#16
Satarupa Biswas, Debdeep Sikdar, Debanjan Das, Manjunatha Mahadevappa, Soumen Das
Understanding of the neural response to electrical stimulation requires simultaneous recording from the various neurons of retina. Electrodes form the physical interface with the neural or retinal tissue. Successful retinal stimulation and recording demands conformal integration of these electrodes with the soft tissue to ensure establishment of proper electrical connection with the excitable tissue. Mechanical impedance of polydimethylsiloxane (PDMS) being compliant with that of retinal tissue, offers excellent potential as a substrate for metal electrodes...
August 25, 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28837213/antithrombotic-potency-of-ticagrelor-versus-clopidogrel-in-type-2-diabetic-patients-with-cardiovascular-disease
#17
M Urooj Zafar, Usman Baber, Donald A Smith, Samantha Sartori, Johanna Contreras, Juan Rey-Mendoza, Carlos A Linares-Koloffon, Gines Escolar, Roxana Mehran, Valentin Fuster, Juan J Badimon
Type-2 Diabetes Mellitus [T2DM] is associated with increased platelet reactivity and hypo-response to antiplatelet drugs. Ticagrelor, with its faster and more potent antiplatelet effects, was shown to reduce adverse events more than clopidogrel in the overall CAD patient population of PLATO trial, but the benefits did not reach statistical significance in the T2DM subgroup. To better understand these findings, we compared the antithrombotic effects of ticagrelor versus with clopidogrel in T2DM patients with cardiovascular disease...
August 24, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28836222/the-implementation-of-managed-entry-agreements-in-central-and-eastern-europe-findings-and-implications
#18
Alessandra Ferrario, Diāna Arāja, Tomasz Bochenek, Tarik Čatić, Dávid Dankó, Maria Dimitrova, Jurij Fürst, Ieva Greičiūtė-Kuprijanov, Iris Hoxha, Arianit Jakupi, Erki Laidmäe, Olga Löblová, Ileana Mardare, Vanda Markovic-Pekovic, Dmitry Meshkov, Tanja Novakovic, Guenka Petrova, Maciej Pomorski, Dominik Tomek, Luka Voncina, Alan Haycox, Panos Kanavos, Patricia Vella Bonanno, Brian Godman
BACKGROUND: Managed entry agreements (MEAs) are a set of instruments to facilitate access to new medicines. This study surveyed the implementation of MEAs in Central and Eastern Europe (CEE) where limited comparative information is currently available. METHOD: We conducted a survey on the implementation of MEAs in CEE between January and March 2017. RESULTS: Sixteen countries participated in this study. Across five countries with available data on the number of different MEA instruments implemented, the most common MEAs implemented were confidential discounts (n = 495, 73%), followed by paybacks (n = 92, 14%), price-volume agreements (n = 37, 5%), free doses (n = 25, 4%), bundle and other agreements (n = 19, 3%), and payment by result (n = 10, >1%)...
August 23, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28834942/using-electrically-evoked-compound-action-potentials-to-estimate-perceptive-levels-in-experienced-adult-cochlear-implant-users
#19
Charles-Alexandre Joly, Vincent Péan, Ruben Hermann, Fabien Seldran, Hung Thai-Van, Eric Truy
HYPOTHESIS: The cochlear implant (CI) fitting level prediction accuracy of electrically-evoked compound action potential (ECAP) should be enhanced by the addition of demographic data in models. INTRODUCTION: No accurate automated fitting of CI based on ECAP has yet been proposed. METHODS: We recorded ECAP in 45 adults who had been using MED-EL CIs for more than 11 months and collected the most comfortable loudness level (MCL) used for CI fitting (prog-MCL), perception thresholds (meas-THR), and MCL (meas-MCL) measured with the stimulation used for ECAP recording...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28834941/selective-stimulation-of-facial-muscles-following-chronic-intraneural-electrode-array-implantation-and-facial-nerve-injury-in-the-feline-model
#20
Ronald Sahyouni, Yarah M Haidar, Omid Moshtaghi, Beverly Y Wang, Hamid R Djalilian, John C Middlebrooks, Harrison W Lin
BACKGROUND: Our group has previously shown that activation of specific facial nerve (FN) fiber populations and selective activation of facial musculature can be achieved through acute intraneural multichannel microelectrode array (MEA) implantation in the feline model. HYPOTHESIS: Selective stimulation of facial muscles will be maintained in the setting of 1) chronic and 2) acute MEA implantation after FN injury and subsequent recovery. METHODS: This study included seven cats...
October 2017: Otology & Neurotology
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