0000000000082229

AUTHOR

Angela Neitz

showing 4 related works from this author

Presynaptic nitric oxide/cGMP facilitates glutamate release via hyperpolarization-activated cyclic nucleotide-gated channels in the hippocampus

2011

In hippocampal neurons, synaptic transmission is affected by a variety of modulators, including nitric oxide (NO), which was proposed as a retrograde messenger as long as two decades ago. NO signals via two NO-sensitive guanylyl cyclases (NO-GCs) (NO-GC1 and NO-GC2) and the subsequent increase in cGMP. Lack of long-term potentiation in mice deficient in either one of the two NO-GCs demonstrates the involvement of both NO-GCs in synaptic transmission. However, the physiological consequences of NO/cGMP and the cellular mechanisms involved are unknown. Here, we analyzed glutamatergic synaptic transmission, most likely reflecting glutamate release, in the hippocampal CA1 region of NO-GC knockou…

General NeuroscienceGlutamate receptorLong-term potentiationHyperpolarization (biology)BiologyNeurotransmissionNitric oxideCell biologychemistry.chemical_compoundGlutamatergicBiochemistrychemistryRetrograde signalingSoluble guanylyl cyclaseEuropean Journal of Neuroscience
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Oligodendrocyte precursor cells modulate the neuronal network by activity-dependent ectodomain cleavage of glial NG2.

2014

The role of glia in modulating neuronal network activity is an important question. Oligodendrocyte precursor cells (OPC) characteristically express the transmembrane proteoglycan nerve-glia antigen 2 (NG2) and are unique glial cells receiving synaptic input from neurons. The development of NG2+ OPC into myelinating oligodendrocytes has been well studied, yet the retention of a large population of synapse-bearing OPC in the adult brain poses the question as to additional functional roles of OPC in the neuronal network. Here we report that activity-dependent processing of NG2 by OPC-expressed secretases functionally regulates the neuronal network. NG2 cleavage by the α-secretase ADAM10 yields…

MaleQH301-705.5ADAM10Long-Term PotentiationAMPA receptorReceptors N-Methyl-D-AspartateGeneral Biochemistry Genetics and Molecular BiologyCell LineADAM10 ProteinMiceBiological neural networkAnimalsBiology (General)AntigensMice KnockoutNeuronsNeuronal PlasticityGeneral Immunology and MicrobiologybiologyGeneral NeurosciencePyramidal CellsGlutamate receptorMembrane ProteinsBiology and Life SciencesLong-term potentiationSensory GatingCell biologyExtracellular MatrixProtein Structure Tertiarystomatognathic diseasesADAM ProteinsOligodendrogliaBiochemistryEctodomainnervous systemReceptors GlutamateSynapsesbiology.proteinSynopsisNMDA receptorProteoglycansAmyloid Precursor Protein SecretasesGeneral Agricultural and Biological SciencesAmyloid precursor protein secretaseNeurosciencePLoS biology
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Focal Cortical Lesions Induce Bidirectional Changes in the Excitability of Fast Spiking and Non Fast Spiking Cortical Interneurons

2014

A physiological brain function requires neuronal networks to operate within a well-defined range of activity. Indeed, alterations in neuronal excitability have been associated with several pathological conditions, ranging from epilepsy to neuropsychiatric disorders. Changes in inhibitory transmission are known to play a key role in the development of hyperexcitability. However it is largely unknown whether specific interneuronal subpopulations contribute differentially to such pathological condition. In the present study we investigated functional alterations of inhibitory interneurons embedded in a hyperexcitable cortical circuit at the border of chronically induced focal lesions in mouse …

500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie570Neural NetworksPostsynaptic CurrentExcitotoxicity610lcsh:MedicineNeurophysiologyAction PotentialsNeural Homeostasis600 Technik Medizin angewandte Wissenschaften::610 Medizin und Gesundheitmedicine.disease_causeInhibitory postsynaptic potentialMiceEpilepsyInterneuronsmedicineBiological neural networkAnimalslcsh:ScienceVisual CortexCerebral CortexMembrane potentialMultidisciplinarymusculoskeletal neural and ocular physiologylcsh:RNeurotransmissionBiology and Life SciencesExcitatory Postsynaptic Potentialsmedicine.diseaseVisual cortexmedicine.anatomical_structurenervous systemCellular NeuroscienceExcitatory postsynaptic potentiallcsh:QNeuroscienceResearch ArticleNeurosciencePLoS ONE
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Postsynaptic NO/cGMP Increases NMDA Receptor Currents via Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels in the Hippocampus

2013

The nitric oxide (NO)/cyclic guanosine monophosphate (cGMP) signaling cascade participates in the modulation of synaptic transmission. The effects of NO are mediated by the NO-sensitive cGMP-forming guanylyl cyclases (NO-GCs), which exist in 2 isoforms with indistinguishable regulatory properties. The lack of long-term potentiation (LTP) in knock-out (KO) mice deficient in either one of the NO-GC isoforms indicates the contribution of both NO-GCs to LTP. Recently, we showed that the NO-GC1 isoform is located presynaptically in glutamatergic neurons and increases the glutamate release via hyperpolarization-activated cyclic nucleotide (HCN)-gated channels in the hippocampus. Electrophysiologi…

Patch-Clamp TechniquesCognitive NeuroscienceLong-Term PotentiationIn Vitro TechniquesNeurotransmissionNitric OxideReceptors N-Methyl-D-AspartateMiceCellular and Molecular Neurosciencechemistry.chemical_compoundCyclic nucleotidePostsynaptic potentialHyperpolarization-Activated Cyclic Nucleotide-Gated ChannelsHCN channelAnimalsAnesthetics LocalCA1 Region HippocampalCyclic GMPCyclic guanosine monophosphateMice KnockoutNeuronsbiologyLidocaineTetraethylammoniumLong-term potentiationHyperpolarization (biology)Electric StimulationPyrimidinesAnimals Newbornnervous systemchemistryGuanylate CyclaseBiophysicsbiology.proteinNMDA receptorExcitatory Amino Acid AntagonistsNeuroscienceCerebral Cortex
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