For in situ hybridization analysis, cryostat sections were hybridized using digoxigenin-labeled probes [45 (link)] directed against mouse TrkA or TrkB, or rat TrkC (gift from L. F. Parada). Antibodies used in this study were as follows: rabbit anti-Er81 [14 (link)], rabbit anti-Pea3 [14 (link)], rabbit anti-PV [14 (link)], rabbit anti-eGFP (Molecular Probes, Eugene, Oregon, United States), rabbit anti-Calbindin, rabbit anti-Calretinin (Swant, Bellinzona, Switzerland), rabbit anti-CGRP (Chemicon, Temecula, California, United States), rabbit anti-vGlut1 (Synaptic Systems, Goettingen, Germany), rabbit anti-Brn3a (gift from E. Turner), rabbit anti-TrkA and -p75 (gift from L. F. Reichardt), rabbit anti-Runx3 (Kramer and Arber, unpublished reagent), rabbit anti-Rhodamine (Molecular Probes), mouse anti-neurofilament (American Type Culture Collection, Manassas, Virginia, United States), sheep anti-eGFP (Biogenesis, Poole, United Kingdom), goat anti-LacZ [14 (link)], goat anti-TrkC (gift from L. F. Reichardt), and guinea pig anti-Isl1 [14 (link)]. Terminal deoxynucleotidyl transferase-mediated biotinylated UTP nick end labeling (TUNEL) to detect apoptotic cells in E13.5 DRG on cryostat sections was performed as described by the manufacturer (Roche, Basel, Switzerland). Quantitative analysis of TUNEL+ DRG cells was performed essentially as described [27 (link)]. BrdU pulse-chase experiments and LacZ wholemount stainings were performed as previously described [46 (link)]. For anterograde tracing experiments to visualize projections of sensory neurons, rhodamine-conjugated dextran (Molecular Probes) was injected into single lumbar (L3) DRG at E13.5 or applied to whole lumbar dorsal roots (L3) at postnatal day (P) 5 using glass capillaries. After injection, animals were incubated for 2–3 h (E13.5) or overnight (P5). Cryostat sections were processed for immunohistochemistry as described [14 (link)] using fluorophore-conjugated secondary antibodies (1:1,000, Molecular Probes). Images were collected on an Olympus (Tokyo, Japan) confocal microscope. Images from in situ hybridization experiments were collected with an RT-SPOT camera (Diagnostic Instruments, Sterling Heights, Michigan, United States), and Corel (Eden Prairie, Minnesota, United States) Photo Paint 10.0 was used for digital processing of images.
Neuron, Afferent
Neuron, Afferent: A type of neuron that transmits signals from sensory receptors or other neurons to the central nervous system.
Afferent neurons convey information about the internal and external environments, enabling the brain to perceive and respond to stimuli.
These neurons play a crucial role in sensory processing, including the senses of touch, sight, hearing, taste, and smell.
Afferent neurons are essential for maintaining homeostasis and facilitating appropriate physiological and behavioral responses.
Afferent neurons convey information about the internal and external environments, enabling the brain to perceive and respond to stimuli.
These neurons play a crucial role in sensory processing, including the senses of touch, sight, hearing, taste, and smell.
Afferent neurons are essential for maintaining homeostasis and facilitating appropriate physiological and behavioral responses.
Most cited protocols related to «Neuron, Afferent»
Anabolism
Animals
Antibodies
Apoptosis
Bromodeoxyuridine
Calbindins
Calretinin
Capillaries
Cavia
Cells
Diagnosis
Digoxigenin
DNA Nucleotidylexotransferase
Domestic Sheep
Goat
Immunohistochemistry
In Situ Hybridization
In Situ Nick-End Labeling
LacZ Genes
Lumbar Region
Mice, House
Microscopy, Confocal
Molecular Probes
Neurofilaments
Neuron, Afferent
Pulse Rate
Rabbits
Rhodamine
rhodamine dextran
Root, Dorsal
Staining
transcription factor PEA3
tropomyosin-related kinase-B, human
Cells
collagenase 1
Fetal Bovine Serum
Ganglia
Ganglia, Spinal
Hemoglobin, Sickle
Lysine
Neuron, Afferent
Papain
Poly A
Rats, Sprague-Dawley
Sodium Chloride
Streptococcal Infections
Uridine
Cells
collagenase 1
DRG1 protein, human
Electron Microscopy
Fetal Bovine Serum
Ganglia
Ganglia, Spinal
Hemoglobin, Sickle
Lumbar Region
Lysine
Neprilysin
Nerve Growth Factors
Neuron, Afferent
Neurons
Penicillins
Poly A
Rats, Sprague-Dawley
Sodium Chloride
Streptomycin
accutase
Astrocytes
Cells
Dopaminergic Neurons
Fibroblast Growth Factor 2
Growth Factor
Heparin
Laminin
Motor Neurons
Neuron, Afferent
Neurons
Oligodendroglia
Ornithine
Poly A
polyornithine
Striatum, Corpus
Action Potentials
Animals
ARID1A protein, human
Bicarbonate, Sodium
Cells
C Fibers
Egtazic Acid
Electric Conductivity
Enzymes
Epineurium
Ganglia
Glucose
HEPES
Inflammation Mediators
Magnesium Chloride
Microelectrodes
Microscopy
Neuron, Afferent
Neurons
Nylons
Protoplasm
Pulses
Root, Dorsal
Satellite Glia
Sodium Chloride
Suction Drainage
Ventral Roots
Most recents protocols related to «Neuron, Afferent»
In this mouse model, the Cre-mediated recombination of Adam23 was tissue-specific and confined to Parvalbumin (Pv)-positive cells such as the interneurons in the brain and the large-diameter proprioceptive afferent sensory neurons of the dorsal root ganglia (de Nooij et al., 2015 (link)). The parvalbumin promoter of the Cre knockin allele directs Cre recombinase expression in Pv-expressing cells (Hippenmeyer et al., 2005 (link)). The allele, originally denoted as Pvalbtm1(cre)Arbr is referred to here as PvCre. Mice expressing PvCre were crossed with Adam23LoxP/LoxP mice, leading to Cre-mediated recombination of Adam23 in Pv-positive tissue. PvCre:Adam23LoxP/LoxP mice are referred to as Adam23PvKO/PvKO.
Alleles
Brain
Cells
Cre recombinase
Ganglia, Spinal
Interneurons
Mice, Laboratory
Neuron, Afferent
Parvalbumins
Proprioception
Recombination, Genetic
Tissues
Tissue Specificity
Here, the current-based leaky integrate-and-fire (C-LIF) neuron model (Gütig, 2016 (link)) is used as the basic computational unit in SCTN. Assuming there are N afferent neurons, the voltage of the C-LIF spiking neuron can be calculated as:
where wi is the synaptic efficacy, denotes the time of the j-th input spike from the i-th afferent neuron, and denotes the time of the j-th firing spike. Each spike at time contributes a postsynaptic potential (PSP), whose shape is determined by the double exponential kernel function . V0 is a normalization factor that normalizes the maximum value of the kernel to 1. αm, αs mean the time decay factors, which are learnable parameters in SCTN. ϑ denotes the threshold of the neuron and it is equal to 0.5 in our experiments. Lt is the dynamics of the leaky integrate-and-fire (LIF) neuron model (Gerstner and Kistler, 2002 (link)), which describes the input synaptic current from N presynaptic neurons. Compared with the LIF model, the C-LIF model has one more reset item Et, indicating that each output spike will suppress the voltage for a moment. For C-LIF model, a spike is triggered when Vt exceeds ϑ and then Vt is reset.
where wi is the synaptic efficacy, denotes the time of the j-th input spike from the i-th afferent neuron, and denotes the time of the j-th firing spike. Each spike at time contributes a postsynaptic potential (PSP), whose shape is determined by the double exponential kernel function . V0 is a normalization factor that normalizes the maximum value of the kernel to 1. αm, αs mean the time decay factors, which are learnable parameters in SCTN. ϑ denotes the threshold of the neuron and it is equal to 0.5 in our experiments. Lt is the dynamics of the leaky integrate-and-fire (LIF) neuron model (Gerstner and Kistler, 2002 (link)), which describes the input synaptic current from N presynaptic neurons. Compared with the LIF model, the C-LIF model has one more reset item Et, indicating that each output spike will suppress the voltage for a moment. For C-LIF model, a spike is triggered when Vt exceeds ϑ and then Vt is reset.
Neuron, Afferent
Neurons
Postsynaptic Potentials
We used two-tailed, paired t tests to compare the mean signal during stimulus presentation with an unstimulated period of identical length within the same neuron. Neurons were tested for both ON and OFF responses. The P values were corrected for multiple testing using false discovery rate (76 ). To test for asymmetric neuron responses, we used two-tailed, two-sample t tests (unpaired). Sensory neuron responses to all conditions are publicly available at this data repository, together with plots of average responses, phase trajectories, and time trace correlation matrices.
Conditioned Reflex
Neuron, Afferent
Neurons
The primary objective of the study was to understand how the 11 chemosensory neuron pairs in C. elegans encode odorant identity and intensity. We developed a transgenic nematode in which all of the ciliated sensory neurons were fluorescently labeled with GCaMP, allowing the activity of the 11 chemosensory neuron pairs to be recorded from simultaneously. We assembled a broad panel of 23 volatile odorants and five pheromones and used a microfluidic device to present these stimuli to nematodes. We used confocal microscopy to record from chemosensory neurons as odorant stimuli at multiple concentrations were presented.
Animals, Transgenic
Microchip Analytical Devices
Microscopy, Confocal
Nematoda
Neuron, Afferent
Neurons
Odorants
Pheromone
The antennal nerves of centipedes were isolated. The sensory neurons were acutely dissociated and harvested in a serum-free medium for enzymatic digestion (a combination of collagenase and trypsin) according to procedures as previously described (25 (link)). These isolated neurons were incubated at 27 °C for 6 h (5% CO2) before calcium imaging. The antennal neurons or HEK293 cells (described below) were loaded with Fluo-4 acetoxymethyl in 2 mM Ca2+ Ringer’s solution, which contained 140 mM NaCl, 5 mM KCl, 2 mM MgCl2, 10 mM glucose, 2 mM CaCl2, and 10 mM 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) (pH 7.2). Fluorescence images of antennal neurons and HEK293 cells were acquired with an Olympus IX73 microscope with a Hamamatsu R2 charge-coupled device camera controlled by MetaFluor software (Molecular Devices). The bathing solution with different pH values (135 mM NaCl, 5 mM KCl, 2 mM MgCl2, 10 mM glucose, 4 mM CaCl2, and 10 mM HEPES) was used to elicit calcium signals. Fluo-4 was excited using an light emitting diode light source (X-Cite 120LED, Lumen Dynamics) with a 500/20-nm excitation filter, while fluorescence emission was detected with a 535/30-nm emission filter. Fluorescence images were acquired with automated routines written in MetaMorph software (Molecular Devices) and analyzed with Igor Pro (WaveMetrics). To heat the cells by perfusion, temperature control was achieved by perfusion of preheated solutions. Solutions were heated with an SHM-828 heater controlled by a CL-100 temperature controller (Harvard Apparatus). The glass slide or patched pipette was placed about 1 mm from the solution output port. A TA-29 miniature bead thermistor was placed right next to the pipette to ensure accurate monitoring of local temperature. The thermistor’s temperature readout was fed into an analog input of the patch amplifier and recorded simultaneously with current.
Acids
Calcium
Chilopoda
Collagenase
Digestion
Enzymes
Fluo 4
Fluorescence
Glucose
HEK293 Cells
HEPES
Light
Magnesium Chloride
Medical Devices
Microscopy
Nervousness
Neuron, Afferent
Neurons
Perfusion
Ringer's Solution
Serum
Sodium Chloride
Trypsin
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L-glutamine is an amino acid that is commonly used as a dietary supplement and in cell culture media. It serves as a source of nitrogen and supports cellular growth and metabolism.
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Penicillin/streptomycin is a commonly used antibiotic solution for cell culture applications. It contains a combination of penicillin and streptomycin, which are broad-spectrum antibiotics that inhibit the growth of both Gram-positive and Gram-negative bacteria.
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Neurobasal medium is a cell culture medium designed for the maintenance and growth of primary neuronal cells. It provides a defined, serum-free environment that supports the survival and differentiation of neurons. The medium is optimized to maintain the phenotypic characteristics of neurons and minimizes the growth of non-neuronal cells.
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NGF is a laboratory instrument used for the detection and quantification of nerve growth factor (NGF) in biological samples. It functions as a tool for researchers studying neurological processes and disorders related to NGF. The core purpose of NGF is to provide accurate and reliable measurements of NGF levels, which is essential for understanding its role in various physiological and pathological conditions.
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HBSS (Hank's Balanced Salt Solution) is a salt-based buffer solution commonly used in cell culture and biological research applications. It provides a balanced ionic environment to maintain the pH and osmotic pressure of cell cultures. The solution contains various inorganic salts, including calcium, magnesium, and potassium, as well as glucose, to support cell viability and homeostasis.
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DMEM/F12 is a cell culture medium developed by Thermo Fisher Scientific. It is a balanced salt solution that provides nutrients and growth factors essential for the cultivation of a variety of cell types, including adherent and suspension cells. The medium is formulated to support the proliferation and maintenance of cells in vitro.
More about "Neuron, Afferent"
Afferent neurons, also known as sensory neurons or receptor neurons, are a type of neuron that transmit signals from sensory receptors or other neurons to the central nervous system.
These neurons play a crucial role in sensory processing, enabling the brain to perceive and respond to both internal and external stimuli.
They are essential for maintaining homeostasis and facilitating appropriate physiological and behavioral responses.
Afferent neurons convey information about various senses, including touch, sight, hearing, taste, and smell.
They transmit signals from receptors, such as mechanoreceptors, photoreceptors, and chemoreceptors, to the central nervous system, where the information is processed and interpreted.
In addition to their sensory functions, afferent neurons are also involved in proprioception, the awareness of the position and movement of the body.
They receive inputs from muscle spindles, Golgi tendon organs, and joint receptors, providing the brain with information about the body's position and movement.
The study of afferent neurons and their function is crucial for understanding various neurological and sensory disorders, as well as for developing treatments and therapies.
Techniques such as L-glutamine, PClamp 10 software, and the use of Neurobasal medium, Laminin, and Poly-D-lysine are commonly employed in the research and analysis of afferent neurons.
Furthermore, the application of NGF (Nerve Growth Factor), Trypsin-EDTA, HBSS, and DMEM/F12 media are also important in the culturing and maintenance of afferent neurons for experimental purposes.
By understanding the role and function of afferent neurons, researchers can gain valuable insights into the mechanisms of sensory perception, neural communication, and the overall functioning of the nervous system.
These neurons play a crucial role in sensory processing, enabling the brain to perceive and respond to both internal and external stimuli.
They are essential for maintaining homeostasis and facilitating appropriate physiological and behavioral responses.
Afferent neurons convey information about various senses, including touch, sight, hearing, taste, and smell.
They transmit signals from receptors, such as mechanoreceptors, photoreceptors, and chemoreceptors, to the central nervous system, where the information is processed and interpreted.
In addition to their sensory functions, afferent neurons are also involved in proprioception, the awareness of the position and movement of the body.
They receive inputs from muscle spindles, Golgi tendon organs, and joint receptors, providing the brain with information about the body's position and movement.
The study of afferent neurons and their function is crucial for understanding various neurological and sensory disorders, as well as for developing treatments and therapies.
Techniques such as L-glutamine, PClamp 10 software, and the use of Neurobasal medium, Laminin, and Poly-D-lysine are commonly employed in the research and analysis of afferent neurons.
Furthermore, the application of NGF (Nerve Growth Factor), Trypsin-EDTA, HBSS, and DMEM/F12 media are also important in the culturing and maintenance of afferent neurons for experimental purposes.
By understanding the role and function of afferent neurons, researchers can gain valuable insights into the mechanisms of sensory perception, neural communication, and the overall functioning of the nervous system.