Browse Items · NEOMED Bibliography Database

Synaptic Inhibition in Avian Interaural Level Difference Sound Localizing Neurons.

Synaptic inhibition plays a fundamental role in the neural computation of the interaural level difference (ILD), an important cue for the localization of high-frequency sound. Here, we studied the inhibitory synaptic currents in the chicken posterior…

Tags: *dorsal nucleus of the lateral lemniscus, *GABAA receptor, *interaural level difference, *reversal potential, *synaptic inhibition, 2016, Acoustic Stimulation/methods, Animals, Anions/metabolism, Avian Proteins/metabolism, Brain Stem/cytology/drug effects/*physiology, Chick Embryo, Chlorides/metabolism, Curry Rebecca J, Department of Anatomy & Neurobiology, Electric Stimulation, eNeuro, Female, GABA-A/metabolism, gamma-Aminobutyric Acid/metabolism, Glycine/metabolism, Intracellular Space/drug effects/metabolism, Lu Yong, Male, NEOMED College of Medicine, Neural Inhibition/drug effects/*physiology, Neurons/cytology/drug effects/*physiology, Patch-Clamp Techniques, Receptors, Sound Localization/drug effects/*physiology, Symporters/metabolism, Synaptic Transmission/drug effects/*physiology, Tissue Culture Techniques

Identification and functional characterization of two type VI collagen receptors, alpha 3 beta 1 integrin and NG2, during avian corneal stromal development.

PURPOSE: The development and maintenance of extracellular matrix architecture in the corneal stroma is associated with abundant type VI collagen deposition. This collagen has been implicated in mediating both cell-matrix and matrix-matrix…

Spatial and temporal variations in extracellular matrix of periocular and corneal regions during corneal stromal development.

The development of the avian corneal stroma occurs in discrete developmental stages. During this sequence of events, the neural crest-derived corneal fibroblast precursor cells are surrounded by distinct extracellular matrices which change both…

Tags: *Extracellular Matrix, 1996, Animals, Birk D E, Cell Differentiation, Chick Embryo, Collagen/biosynthesis, Cornea/chemistry/*embryology/metabolism, Doane K J, Experimental eye research, Eye Proteins/analysis, Fibroblasts/cytology, Glycoproteins/analysis, McLaughlin J S, Neural Crest/cytology, Proteoglycans/biosynthesis, Time Factors, Ting W H

Pertubation of beta1 integrin function using anti-sense or function-blocking antibodies on corneal cells grown on fibronectin and tenascin.

During corneal development, neural crest derivatives from the periocular mesenchyme migrate into the cornea and differentiate into corneal fibroblasts. During this time, these cells interact with a variety of extracellular matrices for proper…

Early development of intrinsic and synaptic properties of chicken nucleus laminaris neurons.

Onset of auditory brainstem responses in chickens takes place at about embryonic day 11/12 (E11/12). We investigated early development of neuronal properties of chicken nucleus laminaris neurons, the third-order auditory neurons critically involved…

Intrinsic plasticity induced by group II metabotropic glutamate receptors via enhancement of high-threshold KV currents in sound localizing neurons.

Intrinsic plasticity has emerged as an important mechanism regulating neuronal excitability and output under physiological and pathological conditions. Here, we report a novel form of intrinsic plasticity. Using perforated patch clamp recordings, we…

Interplay between low threshold voltage-gated K(+) channels and synaptic inhibition in neurons of the chicken nucleus laminaris along its frequency axis.

Central auditory neurons that localize sound in horizontal space have specialized intrinsic and synaptic cellular mechanisms to tightly control the threshold and timing for action potential generation. However, the critical interplay between…

Type VI collagen increases cell survival and prevents anti-beta 1 integrin-mediated apoptosis.

Cell-matrix interactions are important in the development of the avian cornea. Type VI collagen is present within the periocular mesenchyme prior to the migration of cells into the corneal stroma and is abundant in the mature stroma. Whether the…

Inhibition of nerve growth factor-stimulated neurite outgrowth by methylamine-modified alpha 2-macroglobulin.

alpha 2-Macroglobulin (alpha 2M) is a rather ubiquitous protein in extracellular spaces of mammals. It is an inhibitor of endopeptidases, can be modified by aliphatic amines, and combines with a number of hormones/cytokines such as beta-nerve growth…

Interaction of nerve growth factor with murine alpha-macroglobulin.

The murine nerve growth factor, when injected i.v. or, combined in vitro with plasma, was found largely associated with the mouse alpha-macroglobulin (a homologue of human alpha 2-macroglobulin). The nerve growth factor-alpha-macroglobulin complex…

Tags: 1989, alpha-Macroglobulins/*metabolism, Animals, Cells, Chick Embryo, Cultured, Ganglia, Journal of neuroscience research, Koo P H, Methylamines/pharmacology, Mice, Nerve Growth Factors/*metabolism, Spinal/*cytology/drug effects, Stach R W, Trypsin/pharmacology, Zinc/pharmacology

An overview of vertebrate mineralization with emphasis on collagen-mineral interaction.

The nucleation, growth, and development of mineral crystals through their interaction principally with collagen in normal bone and calcifying tendon have been elaborated by applying a number of different techniques for analysis of the inorganic and…

Serotonin-activated alpha 2-macroglobulin inhibits neurite outgrowth and survival of embryonic sensory and cerebral cortical neurons.

Methylamine-modified alpha-2-macroglobulin (MA-alpha 2M) has been recently shown to inhibit the biological activity of beta-nerve growth factor (NGF) in promoting neurite outgrowth by embryonic dorsal root ganglia in culture (Koo PH, Liebl DJ, J…

Regulation of glutamatergic and GABAergic neurotransmission in the chick nucleus laminaris: role of N-type calcium channels.

Neurons in the chicken nucleus laminaris (NL), the third order auditory nucleus involved in azimuth sound localization, receive bilaterally segregated (ipsilateral vs contralateral) glutamatergic excitation from the cochlear nucleus magnocellularis…

Thrombospondin-4 mediates TGF-beta-induced angiogenesis.

TGF-beta is a multifunctional cytokine affecting many cell types and implicated in tissue remodeling processes. Due to its many functions and cell-specific effects, the consequences of TGF-beta signaling are process-and stage-dependent, and it is not…

Metabotropic glutamate and GABA receptors modulate cellular excitability and glutamatergic transmission in chicken cochlear nucleus angularis neurons.

Neurons in the avian cochlear nucleus angularis (NA) receive glutamatergic input from the auditory nerve, and GABAergic input from the superior olivary nucleus. Physiologically heterogeneous, NA neurons perform multiple functions including encoding…

Modified aminosilane substrates to evaluate osteoblast attachment, growth, and gene expression in vitro.

Bone cell-substrate interactions are important to understand in the design, selection, and surface modification of bone implants. To gain insight into such interactions, substrates designed with surface species approximating the physiological…

Tags: *Cell Adhesion, *Cell Division, *Gene Expression, *Silanes/chemistry, 2006, Alkaline Phosphatase/metabolism, Animals, Base Sequence, Chick Embryo, Collagen/metabolism, DNA Primers, Jacquet R, Journal of biomedical materials research. Part A, Landis W J, Osteoblasts/*cytology/enzymology/metabolism, Reverse Transcriptase Polymerase Chain Reaction, RNA/isolation & purification/metabolism, Siperko L M

Ambient GABA-activated tonic inhibition sharpens auditory coincidence detection via a depolarizing shunting mechanism.

Tonic inhibition mediated by extrasynaptic GABA(A) receptors (GABA(A)Rs) has emerged as a novel form of neural inhibition in the CNS. However, little is known about its presence and function in the auditory system. Using whole-cell recordings in…

Control of a depolarizing GABAergic input in an auditory coincidence detection circuit.

Neurons in the chicken nucleus laminaris (NL), the third-order auditory neurons that detect the interaural time differences that enable animals to localize sounds in the horizontal plane, receive glutamatergic excitation from the cochlear nucleus…

Activation of synaptic group II metabotropic glutamate receptors induces long-term depression at GABAergic synapses in CNS neurons.

Metabotropic glutamate receptor (mGluR)-dependent homosynaptic long-term depression (LTD) has been studied extensively at glutamatergic synapses in the CNS. However, much less is known about heterosynaptic long-term plasticity induced by mGluRs at…

Tags: 2013, Amino Acids/pharmacology, Animals, Chick Embryo, Cochlear Nucleus/drug effects/metabolism, Curry Rebecca J, Cyclopropanes/pharmacology, Department of Anatomy & Neurobiology, Dinh Emilie Hoang, Excitatory Amino Acid Agonists/pharmacology, Excitatory Amino Acid Antagonists/pharmacology, Excitatory Postsynaptic Potentials/drug effects/physiology, GABAergic Neurons/drug effects/*metabolism, Glycine/analogs & derivatives/pharmacology, Hamlet William R, Inhibitory Postsynaptic Potentials/drug effects/physiology, Liu Yu-Wei, Long-Term Synaptic Depression/drug effects/*physiology, Lu Yong, Metabotropic Glutamate/agonists/antagonists & inhibitors/*metabolism, NEOMED College of Medicine, Neural Inhibition/drug effects/physiology, Receptors, Shi Wei, Synapses/drug effects/*metabolism, Synaptic Transmission/drug effects/*physiology, Tang Zheng-Quan, The Journal of neuroscience : the official journal of the Society for Neuroscience, Xanthenes/pharmacology

Two GABAA responses with distinct kinetics in a sound localization circuit.

The temporal characteristics and functional diversity of GABAergic inhibition are determined by the spatiotemporal neurotransmitter profile, intrinsic properties of GABAA receptors, and other factors. Here, we report two distinct GABAA responses and…

Tags: *Sound, 2012, Animals, Chick Embryo, Chickens, Department of Anatomy & Neurobiology, Female, GABA-A/*physiology, gamma-Aminobutyric Acid/metabolism, Lu Yong, Male, NEOMED College of Medicine, Neurons/*metabolism, Pitch Discrimination, Receptors, Sound Localization/*physiology, Synapses/physiology, Tang Zheng-Quan, The Journal of physiology

Synaptic activity-induced Ca(2+) signaling in avian cochlear nucleus magnocellularis neurons.

Neurons of the avian cochlear nucleus magnocellularis (NM) receive glutamatergic inputs from the spiral ganglion cells via the auditory nerve and feedback GABAergic inputs primarily from the superior olivary nucleus. We investigated regulation of…

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