The proposed Program uses approaches within the disciplines of neuroanatomy, neuropharmacology, and neurophysiology to study a) electrophysiological abnormalities in injured neurons and those of chronic epileptiform foci; b) the physiology of GABA-ergic neurons in cortex and thalamus; c) actions of neurotransmitters including ACh, GABA, norepinephrine, and serotonin; d) normal organization and physiology of cortical neurons and mechanisms for initiation and propagation of epileptiform discharges in cortex; e) influences of ascending cholinergic and noradrenergic systems on cortical neuronal activities and epileptiform spike-wave activities in a simple vertebrate nervous system; f) the role of serotonin subtypes and modulation of cortical excitability; and g) mechanisms of glutamate neurotoxicity on cortical neurons. The specific projects are: I. Regulation of neuronal excitability and epileptogenesis; II. Functional organization of local cortical circuits; III. Serotonin receptor subtypes and cortical excitability; IV. Subcortical influences on cortical excitability; and V. Glutamate neurotoxicity. The techniques employed include intracellular recordings; application of neurotransmitters and other agents; patch clamp recordings of whole cell currents; field potential analysis; use of cortical slice, cultured and acutely dissociated neocortical neurons and turtle nervous system in vitro; intracellular and retrograde neuronal labeling; immunocytochemistry; radioligand binding and autoradiography. The long-term goals of the Program are to obtain information which will provide a better understanding of the pathogenesis of epilepsy and insights which will lead to the development of rational new approaches to the prevention and treatment of this disorder. The studies outlined will also contribute to our understanding of normal regulation of cerebral excitability through effects of functional connections, specific transmitter systems, and intrinsic neuronal properties.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Specialized Center (P50)
Project #
5P50NS012151-16
Application #
3107657
Study Section
Neurological Disorders Program Project Review B Committee (NSPB)
Project Start
1975-06-01
Project End
1991-05-31
Budget Start
1990-06-01
Budget End
1991-05-31
Support Year
16
Fiscal Year
1990
Total Cost
Indirect Cost
Name
Stanford University
Department
Type
Schools of Medicine
DUNS #
800771545
City
Stanford
State
CA
Country
United States
Zip Code
94305
Gu, Feng; Parada, Isabel; Shen, Fran et al. (2017) Structural alterations in fast-spiking GABAergic interneurons in a model of posttraumatic neocortical epileptogenesis. Neurobiol Dis 108:100-114
Takahashi, D Koji; Gu, Feng; Parada, Isabel et al. (2016) Aberrant excitatory rewiring of layer V pyramidal neurons early after neocortical trauma. Neurobiol Dis 91:166-81
Prince, David A (2014) How do we make models that are useful in understanding partial epilepsies? Adv Exp Med Biol 813:233-41
Tani, Hiroaki; Dulla, Chris G; Farzampour, Zoya et al. (2014) A local glutamate-glutamine cycle sustains synaptic excitatory transmitter release. Neuron 81:888-900
Jin, Xiaoming; Jiang, Kewen; Prince, David A (2014) Excitatory and inhibitory synaptic connectivity to layer V fast-spiking interneurons in the freeze lesion model of cortical microgyria. J Neurophysiol 112:1703-13
Mantoan Ritter, Laura; Golshani, Peyman; Takahashi, Koji et al. (2014) WONOEP appraisal: optogenetic tools to suppress seizures and explore the mechanisms of epileptogenesis. Epilepsia 55:1693-702
Dulla, C G; Tani, H; Brill, J et al. (2013) Glutamate biosensor imaging reveals dysregulation of glutamatergic pathways in a model of developmental cortical malformation. Neurobiol Dis 49:232-46
Ma, Yunyong; Ramachandran, Anu; Ford, Naomi et al. (2013) Remodeling of dendrites and spines in the C1q knockout model of genetic epilepsy. Epilepsia 54:1232-9
Carter, Matthew E; Brill, Julia; Bonnavion, Patricia et al. (2012) Mechanism for Hypocretin-mediated sleep-to-wake transitions. Proc Natl Acad Sci U S A 109:E2635-44
Zhang, Wei; Huguenard, John R; Buckmaster, Paul S (2012) Increased excitatory synaptic input to granule cells from hilar and CA3 regions in a rat model of temporal lobe epilepsy. J Neurosci 32:1183-96

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