Historical Perspective Neuroscience at Johns Hopkins
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The Baseline Structure of the Enteric Nervous System and Its Role in Parkinson’S Disease
life Review The Baseline Structure of the Enteric Nervous System and Its Role in Parkinson’s Disease Gianfranco Natale 1,2,* , Larisa Ryskalin 1 , Gabriele Morucci 1 , Gloria Lazzeri 1, Alessandro Frati 3,4 and Francesco Fornai 1,4 1 Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy; [email protected] (L.R.); [email protected] (G.M.); [email protected] (G.L.); [email protected] (F.F.) 2 Museum of Human Anatomy “Filippo Civinini”, University of Pisa, 56126 Pisa, Italy 3 Neurosurgery Division, Human Neurosciences Department, Sapienza University of Rome, 00135 Rome, Italy; [email protected] 4 Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.) Neuromed, 86077 Pozzilli, Italy * Correspondence: [email protected] Abstract: The gastrointestinal (GI) tract is provided with a peculiar nervous network, known as the enteric nervous system (ENS), which is dedicated to the fine control of digestive functions. This forms a complex network, which includes several types of neurons, as well as glial cells. Despite extensive studies, a comprehensive classification of these neurons is still lacking. The complexity of ENS is magnified by a multiple control of the central nervous system, and bidirectional communication between various central nervous areas and the gut occurs. This lends substance to the complexity of the microbiota–gut–brain axis, which represents the network governing homeostasis through nervous, endocrine, immune, and metabolic pathways. The present manuscript is dedicated to Citation: Natale, G.; Ryskalin, L.; identifying various neuronal cytotypes belonging to ENS in baseline conditions. -
GSK3 Signalling Regulates Mammalian Axon Regeneration by Inducing the Expression of Smad1
ARTICLE Received 28 Mar 2013 | Accepted 27 Sep 2013 | Published 28 Oct 2013 DOI: 10.1038/ncomms3690 PI3K–GSK3 signalling regulates mammalian axon regeneration by inducing the expression of Smad1 Saijilafu1,*, Eun-Mi Hur1,2,*, Chang-Mei Liu1, Zhongxian Jiao1, Wen-Lin Xu1 & Feng-Quan Zhou1,3 In contrast to neurons in the central nervous system, mature neurons in the mammalian peripheral nervous system (PNS) can regenerate axons after injury, in part, by enhancing intrinsic growth competence. However, the signalling pathways that enhance the growth potential and induce spontaneous axon regeneration remain poorly understood. Here we reveal that phosphatidylinositol 3-kinase (PI3K) signalling is activated in response to peripheral axotomy and that PI3K pathway is required for sensory axon regeneration. Moreover, we show that glycogen synthase kinase 3 (GSK3), rather than mammalian target of rapamycin, mediates PI3K-dependent augmentation of the growth potential in the PNS. Furthermore, we show that PI3K–GSK3 signal is conveyed by the induction of a transcription factor Smad1 and that acute depletion of Smad1 in adult mice prevents axon regeneration in vivo. Together, these results suggest PI3K–GSK3–Smad1 signalling as a central module for promoting sensory axon regeneration in the mammalian nervous system. 1 Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. 2 Center for Neuroscience, Brain Science Institute, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea. 3 The Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. * These authors contributed equally to this work. -
Oxytocin Effects in Mothers and Infants During Breastfeeding
© 2013 SNL All rights reserved REVIEW Oxytocin effects in mothers and infants during breastfeeding Oxytocin integrates the function of several body systems and exerts many effects in mothers and infants during breastfeeding. This article explains the pathways of oxytocin release and reviews how oxytocin can affect behaviour due to its parallel release into the blood circulation and the brain. Oxytocin levels are higher in the infant than in the mother and these levels are affected by mode of birth. The importance of skin-to-skin contact and its association with breastfeeding and mother-infant bonding is discussed. Kerstin Uvnäs Moberg Oxytocin – a system activator increased function of inhibitory alpha-2 3 MD, PhD xytocin, a small peptide of just nine adrenoceptors . Professor of Physiology amino acids, is normally associated The regulation of the release of oxytocin Swedish University of Agriculture O with labour and the milk ejection reflex. is complex and can be affected by different [email protected] However, oxytocin is not only a hormone types of sensory inputs, by hormones such Danielle K. Prime but also a neurotransmitter and a as oestrogen and even by the oxytocin 1,2 molecule itself. This article will focus on PhD paracrine substance in the brain . During Breastfeeding Research Associate breastfeeding it is released into the brain of four major sensory input nervous Medela AG, Baar, Switzerland both mother and infant where it induces a pathways (FIGURES 2 and 3) activated by: great variety of functional responses. 1. Sucking of the mother’s nipple, in which Through three different release pathways the sensory nerves originate in the (FIGURE 1), oxytocin functions rather like a breast. -
Neurotransmitter Actions
Central University of South Bihar Panchanpur, Gaya, India E-Learning Resources Department of Biotechnology NB: These materials are taken/borrowed/modified/compiled from various resources like research articles and freely available internet websites, and are meant to be used solely for the teaching purpose in a public university, and for serving the needs of specified educational programmes. Dr. Jawaid Ahsan Assistant Professor Department of Biotechnology Central University of South Bihar (CUSB) Course Code: MSBTN2003E04 Course Name: Neuroscience Neurotransmitter Actions • Excitatory Action: – A neurotransmitter that puts a neuron closer to an action potential (facilitation) or causes an action potential • Inhibitory Action: – A neurotransmitter that moves a neuron further away from an action potential • Response of neuron: – Responds according to the sum of all the neurotransmitters received at one time Neurotransmitters • Acetylcholine • Monoamines – modified amino acids • Amino acids • Neuropeptides- short chains of amino acids • Depression: – Caused by the imbalances of neurotransmitters • Many drugs imitate neurotransmitters – Ex: Prozac, zoloft, alcohol, drugs, tobacco Release of Neurotransmitters • When an action potential reaches the end of an axon, Ca+ channels in the neuron open • Causes Ca+ to rush in – Cause the synaptic vesicles to fuse with the cell membrane – Release the neurotransmitters into the synaptic cleft • After binding, neurotransmitters will either: – Be destroyed in the synaptic cleft OR – Taken back in to surrounding neurons (reuptake) Excitable cells: Definition: Refers to the ability of some cells to be electrically excited resulting in the generation of action potentials. Neurons, muscle cells (skeletal, cardiac, and smooth), and some endocrine cells (e.g., insulin- releasing pancreatic β cells) are excitable cells. -
Oxytocinergic-System-A-Proposal.Pdf
Opinion Article iMedPub Journals ACTA PSYCHOPATHOLOGICA 2018 www.imedpub.com ISSN 2469-6676 Vol.4 No.3:14 DOI: 10.4172/2469-6676.100170 Oxytocinergic System: A Proposal João Paulo Correia Lima* and Avelino Luiz Rodrigues Received: April 17, 2018; Accepted: May 07, 2018; Published: May 18, 2018 Department of Clinical Psychology and Nucleus of Neuroscience and Behavior, Institute of Psychology, University of Sao Introduction Paulo, Brazil Since 1910, when Ott and Scott [1] published their discovers about the oxytocin participation in milk ejection, the comprehension *Corresponding author: about function and role of oxytocin in several physiological João Paulo Correia Lima functions didn’t stop enlarging and growing. In birth, through his action over uterus contractions, in uterus contractions in [email protected] women’s orgasm and men’s erection [2,3], for instance. However, this approach always considers its peripheral effects. After this, Psychologist for Neuroscience and Behavior, some oxytocin effects had been reported to have actions over Institute of Psychology, University of Sao behavioural traits, like we can see in publishings of Pedersen and Paulo, Brazil. Prange [4] and Winslow and co-workers [5], reporting the oxytocin actions over, respectively, maternal behaviour and pair bonding. Tel: +55-11-32852420; +55-11-983439754 Since then, the increasing data about the oxytocin’s function in behaviour and its central action can’t be ignored. In this short proposal, we’ll consider the opportunity or utility of thinking Citation about oxytocin as a system, instead of a single neurotransmitter. : Lima JPC, Rodrigues AL (2018) Oxytocinergic System: A Proposal. Acta Neurotransmitter or Hormone: Central Psychopathol Vol.4 No.3:14 and Peripheral Actions of Oxytocin Once a molecule could have his function defined through the way death, passive avoidance). -
Neuroscience: the Science of the Brain
NEUROSCIENCE SCIENCE OF THE BRAIN AN INTRODUCTION FOR YOUNG STUDENTS British Neuroscience Association European Dana Alliance for the Brain Neuroscience: the Science of the Brain 1 The Nervous System P2 2 Neurons and the Action Potential P4 3 Chemical Messengers P7 4 Drugs and the Brain P9 5 Touch and Pain P11 6 Vision P14 Inside our heads, weighing about 1.5 kg, is an astonishing living organ consisting of 7 Movement P19 billions of tiny cells. It enables us to sense the world around us, to think and to talk. The human brain is the most complex organ of the body, and arguably the most 8 The Developing P22 complex thing on earth. This booklet is an introduction for young students. Nervous System In this booklet, we describe what we know about how the brain works and how much 9 Dyslexia P25 there still is to learn. Its study involves scientists and medical doctors from many disciplines, ranging from molecular biology through to experimental psychology, as well as the disciplines of anatomy, physiology and pharmacology. Their shared 10 Plasticity P27 interest has led to a new discipline called neuroscience - the science of the brain. 11 Learning and Memory P30 The brain described in our booklet can do a lot but not everything. It has nerve cells - its building blocks - and these are connected together in networks. These 12 Stress P35 networks are in a constant state of electrical and chemical activity. The brain we describe can see and feel. It can sense pain and its chemical tricks help control the uncomfortable effects of pain. -
At Storrs Th 5:00 Pm5:00 Universityconnecticutof Annual – Laurelhall,Floor First – 8:30 Pm 8:30 Th , 2016 , ITINERARY 5 Pm – 6 Pm …… Keynote Lecture
An event organized by the HERE PLACE PLACE UCONN Interdisciplinary STAMP Neuroscience Program Steering Committee with the support of the 20th Annual UCONN OVPR Scholarship Facilitation Fund Neuroscience and the contribution of the at Storrs departments of Biomedical Engineering Electrical & Computer Eng. Monday, October 24th, 2016 Pharmaceutical Sciences Physiology & Neurobiology Psychological Sciences and the CT Institute for the Brain For more info visit 5:00 pm – 8:30 pm and Cognitive Sciences http://neuroscience.uconn.edu/ University of Connecticut Storrs Campus – Laurel Hall, First Floor ITINERARY 5 pm – 6 pm …… Keynote Lecture David Ginty, Ph.D. Professor, Harvard Medical School, Boston MA 6 pm – 8:30 pm ......Poster Session & Reception During the poster session, Ph.D. students, postdoctoral fellows, and researchers from across campus will present their work in Keynote Lecture Keynote Speaker poster format. Everybody is welcome to interact informally over food and drinks. A Molecular-genetic David Ginty, Ph.D. Professor, Harvard Medical 7 pm – 8 pm ……………. Data Blitz Approach to Decoding School Investigator, Howard Hughes The Data Blitz is a fun way for trainees to the Sense of Touch Medical Institute present their research in a concise manner http://gintylab.hms.harvard.edu/ to a diverse audience by encapsulating Abstract: The somatosensory system endows us Bio: Dr. Ginty received a degree in biology from Mount their work in a 3 minute-long presentation with a remarkable capacity for object recognition, Saint Mary’s College (1984) and a Ph.D. in physiology and limited to only 3 PowerPoint slides. The texture discrimination, sensory-motor feedback, from East Carolina University School of Medicine bell will be rung at the end of the 3 and social exchange. -
Mechanism for Neurotransmitter-Receptor Matching
Mechanism for neurotransmitter-receptor matching Dena R. Hammond-Weinbergera,1,2, Yunxin Wanga, Alex Glavis-Blooma, and Nicholas C. Spitzera,b,1 aNeurobiology Section, Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093-0357; and bCenter for Neural Circuits and Behavior, Kavli Institute for Brain and Mind, University of California San Diego, La Jolla, CA 92161 Contributed by Nicholas C. Spitzer, January 6, 2020 (sent for review September 25, 2019; reviewed by Laura N. Borodinsky and Joshua R. Sanes) Synaptic communication requires the expression of functional neurons lead to the appearance of functional neuromuscular postsynaptic receptors that match the presynaptically released junctions expressing GluR1 and GluR2 (alias GluA1 and GluA2) neurotransmitter. The ability of neurons to switch the transmitter subunits, which are blocked by the AMPA receptor antagonist they release is increasingly well documented, and these switches GYKI 52466 (16, 17). In the central nervous system, the natural require changes in the postsynaptic receptor population. Al- developmental transmitter switch from GABA to glycine in the though the activity-dependent molecular mechanism of neuro- auditory nervous system is accompanied by alterations in the transmitter switching is increasingly well understood, the basis properties of postsynaptic receptors (18, 19). Changes in illumi- of specification of postsynaptic neurotransmitter receptors match- nation during development or in photoperiod in the adult lead to ing the newly expressed transmitter is unknown. Using a func- changes in the numbers of neurons expressing dopamine in the tional assay, we show that sustained application of glutamate to embryonic vertebrate skeletal muscle cells cultured before hypothalamus that are accompanied by corresponding up- or innervation is necessary and sufficient to up-regulate ionotropic down-regulation of dopamine receptor expression in postsynaptic glutamate receptors from a pool of different receptors expressed neurons (5, 7). -
Neurotransmitter Notes
Synapses and Neurotransmitters Notes Chemical Transmitters called “Neurotransmitters” carry a signal across Synapses (& at Neuromuscular Junctions) A point of contact between two neurons is called a synapse At the synapse there is a break in electrical transmission (the action potential cannot cross). Instead chemicals called “neurotransmitters” are released that carry the signal to the next nerve. There is a delay at synapses, because chemical transmission between neurons is slower than electrical transmission (action potential) within a neuron. A neuromuscular junction (NMJ) is a contact between a neuron and a muscle: it is like a synapse in that the action potential stops and the signal is carried by a chemical neurotransmitter released by the neuron. Neurotransmitters Are Made and Stored in the Pre-synaptic Terminal The end of the neuron enlarges into an axon terminal Neurotransmitters are produced in the cell body of a neuron and then transported to the ends of the axon terminals in small membrane-enclosed sacs called “synaptic vesicles”. At the axon terminus, neurotransmitters are stored in these tiny synaptic vesicles so that they can be released when an action potential reaches the axon terminus At a synapse, axon termini of the pre-synaptic neuron contact the dendrites of the post-synaptic neuron. Because the neurotransmitter is only located in the axon termini on one side of a synapse, the impulse can go in only one direction. Calcium is Required for Neurotransmitter Release Neurotransmitter release requires Ca2+ ions Normally, the concentration of Ca2+ in the pre-synaptic neuron l is kept very low (by the action of a Ca pump). -
5-HT2C Agonists Modulate Schizophrenia-Like Behaviors in Mice
Neuropsychopharmacology (2017) 42, 2163–2177 © 2017 American College of Neuropsychopharmacology. All rights reserved 0893-133X/17 www.neuropsychopharmacology.org 5-HT2C Agonists Modulate Schizophrenia-Like Behaviors in Mice 1 1,2 3,7 4 1 Vladimir M Pogorelov , Ramona M Rodriguiz , Jianjun Cheng , Mei Huang , Claire M Schmerberg , 4 5 3 ,1,2,6 Herbert Y Meltzer , Bryan L Roth , Alan P Kozikowski and William C Wetsel* 1 2 Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA; Mouse Behavioral and Neuroendocrine 3 Analysis Core Facility, Duke University Medical Center, Durham, NC, USA; Drug Discovery Program, Department of Medicinal Chemistry and 4 Pharmacognosy, College of Pharmacy, University of Illinois, Chicago, IL, USA; Department of Psychiatry and Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA; 5National Institute of Mental Health Psychoactive Drug Screening Program, Department of Pharmacology and Division of Chemical Biology and Medicinal Chemistry, University of North Carolina Chapel Hill Medical School, Chapel Hill, NC, 6 USA; Departments of Cell Biology and Neurobiology, Duke University Medical Center, Durham, NC, USA All FDA-approved antipsychotic drugs (APDs) target primarily dopamine D2 or serotonin (5-HT2A) receptors, or both; however, these medications are not universally effective, they may produce undesirable side effects, and provide only partial amelioration of negative and cognitive symptoms. The heterogeneity of pharmacological responses in schizophrenic patients suggests that additional drug targets may be effective in improving aspects of this syndrome. Recent evidence suggests that 5-HT receptors may be a promising target for 2C schizophrenia since their activation reduces mesolimbic nigrostriatal dopamine release (which conveys antipsychotic action), they are expressed almost exclusively in CNS, and have weight-loss-promoting capabilities. -
Alumni Director Cover Page.Pub
Harvard University Program in Neuroscience History of Enrollment in The Program in Neuroscience July 2018 Updated each July Nicholas Spitzer, M.D./Ph.D. B.A., Harvard College Entered 1966 * Defended May 14, 1969 Advisor: David Poer A Physiological and Histological Invesgaon of the Intercellular Transfer of Small Molecules _____________ Professor of Neurobiology University of California at San Diego Eric Frank, Ph.D. B.A., Reed College Entered 1967 * Defended January 17, 1972 Advisor: Edwin J. Furshpan The Control of Facilitaon at the Neuromuscular Juncon of the Lobster _______________ Professor Emeritus of Physiology Tus University School of Medicine Albert Hudspeth, M.D./Ph.D. B.A., Harvard College Entered 1967 * Defended April 30, 1973 Advisor: David Poer Intercellular Juncons in Epithelia _______________ Professor of Neuroscience The Rockefeller University David Van Essen, Ph.D. B.S., California Instute of Technology Entered 1967 * Defended October 22, 1971 Advisor: John Nicholls Effects of an Electronic Pump on Signaling by Leech Sensory Neurons ______________ Professor of Anatomy and Neurobiology Washington University David Van Essen, Eric Frank, and Albert Hudspeth At the 50th Anniversary celebraon for the creaon of the Harvard Department of Neurobiology October 7, 2016 Richard Mains, Ph.D. Sc.B., M.S., Brown University Entered 1968 * Defended April 24, 1973 Advisor: David Poer Tissue Culture of Dissociated Primary Rat Sympathec Neurons: Studies of Growth, Neurotransmier Metabolism, and Maturaon _______________ Professor of Neuroscience University of Conneccut Health Center Peter MacLeish, Ph.D. B.E.Sc., University of Western Ontario Entered 1969 * Defended December 29, 1976 Advisor: David Poer Synapse Formaon in Cultures of Dissociated Rat Sympathec Neurons Grown on Dissociated Rat Heart Cells _______________ Professor and Director of the Neuroscience Instute Morehouse School of Medicine Peter Sargent, Ph.D. -
Iwyeth Been Identified in Many Diverse Animal Species and Also in Mammalian Viruses
Conference Lecture Series Courses About the Workshop This workshop will be a unique chance to regroup and share results from scientists interested in semaphorins and their receptors . Submission of Applications • 10fellowships of 600 euros each will be provided by the "Ecole des Neurosciences de Paris" to students presenting posters at the meeting to cover the registration cas t. Students will be selected among the registered participants by the organizers. The Semaphorins are one of the t?l\111 Boehri~ger largest family of axon guidance "'llIhv Ingelhelm molecules, with more than 25 distinct genes characterized in vertebrates and invertebrates. Semaphorins have IWyeth been identified in many diverse animal species and also in mammalian viruses. Semaphorins participate in a variety of developmental and pathological processes. In vitro most semaphorins have potent repulsive effects on specific classes of embryonic axons, although some exert attractive effects. In addition to their ro Ie in axon guidance, many results suggest that semaphorins are involved in other developmental or pathological processes, such as apopt osis, tumorigenesis, angiogenesis, neurodegenerative diseases Conference Lecture Series Courses Speakers (confirmed) Britta Eickholt INSERMU841 MRC Centre for Developmental Neurobiology Faculte de MMecine Kings College London Submission of 8 rue du General Sarrail New Hunts House, Guys Campus Applications 94010 Creteil Strand, London WC2R 2LS France U.K [email protected] David Ginty Mary C. Halloran The Solomon H. Snyder Department of Neuroscience University of Wisconsin-Madison Zoology Howard Hughes Medical Institute 307 Zoo Research The Johns Hopkins University School of Medicine 1300 University Ave. Room 10 15, PCfB Madison, WI 53706-1532 t?l\111 Boehri~geJ 725 N.