Glutamate Uptake Analysis
Glutamate Uptake Analysis - Related Videos
09:42
Deriving the Time Course of Glutamate Clearance with a Deconvolution Analysis of Astrocytic Transporter Currents
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Cited by 11 •
2013
We describe an analytical method to estimate the lifetime of glutamate at astrocytic membranes from electrophysiological recordings of glutamate transporter currents in astrocytes.
01:22
Analysis of Glutamic Acid Decarboxylase Isoforms in Human Brain Tissue
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2025
Homogenize the tissue with a homogenizer to release proteins, including glutamic acid decarboxylase, or GAD enzyme isoforms, essential for brain function.
04:34
In Vivo Real-Time Glutamate Monitoring Using an Enzyme-Coated Microelectrode Array
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2025
In this video, a Multielectrode Array (MEA) coated with glutamate Oxidase is implanted into the brain tissue of an anesthetized mouse. Glutamate solution is injected into the extracellular space where the MEA detects the glutamate levels, enabling real-time monitoring of glutamate uptake by the astrocytes.
08:27
Single Synapse Indicators of Glutamate Release and Uptake in Acute Brain Slices from Normal and Huntington Mice
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Cited by 8 •
2020
We present a protocol to evaluate the balance between glutamate release and clearance at single corticostriatal glutamatergic synapses in acute slices from adult mice. This protocol uses the fluorescent sensor iGluu for glutamate detection, a sCMOS camera for signal acquisition and a device for focal laser illumination.
11:26
Assessment of Dopaminergic Homeostasis in Mice by Use of High-performance Liquid Chromatography Analysis and Synaptosomal Dopamine Uptake
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Cited by 20 •
2017
Synaptosomal dopamine uptake and high-performance liquid chromatography analysis represent experimental tools to investigate dopamine homeostasis in mice by assessing the function of the dopamine transporter and levels of dopamine in striatal tissue, respectively. Here we present protocols to measure dopamine tissue content and assess the functionality of the dopamine transporter.
FAQs
High-affinity excitatory amino acid transporters use electrochemical ion gradients to move glutamate from the extracellular space into astrocytes and neurons. This transporter-dependent movement lowers extracellular glutamate and supports tightly controlled neural signaling. Measuring uptake can therefore reveal how effectively these cells contribute to glutamate clearance under different cellular or experimental conditions.
The ion gradients across the cell membrane provide the driving force for transporter-mediated glutamate movement. If cellular conditions alter those gradients, measured uptake may change even when transporter abundance or intrinsic activity has not changed. Interpreting results therefore requires distinguishing altered transporter function from changes in the cellular environment that powers transport.
An uptake-rate measurement describes how quickly cells remove glutamate under defined conditions, whereas transporter activity focuses more specifically on the operation of the transport system. The two readouts can be related but are not identical, because cellular state and ion gradients also influence movement. Measuring changes after manipulation adds another level of functional comparison.
Reduced or disrupted removal of extracellular glutamate can interfere with balanced neural signaling and may contribute to excessive excitatory activity associated with excitotoxicity. Conversely, effective uptake supports control of the extracellular neurotransmitter environment and can contribute to neuroprotective mechanisms. Uptake measurements help connect cellular transporter behavior with these broader consequences in neural systems.
Depending on the assay design, the analysis may quantify the rate of glutamate uptake, transporter activity, or changes produced by a pharmacological or cellular manipulation. These measurements provide functional evidence rather than relying only on the presence of transporters. Comparing conditions can show whether an intervention changes glutamate removal by the cells being studied.
Researchers compare uptake measurements before and after a defined pharmacological or cellular change to determine whether glutamate handling is altered. The resulting difference can indicate a change in transporter function or in the cellular processes that support transport. This approach is useful for testing mechanisms involved in signaling, injury, or neuroprotective responses.
The measurements connect cellular glutamate handling with processes central to neuroscience, including synaptic transmission, excitotoxicity, neuroprotection, recycling, and metabolism. Examining uptake in altered cellular conditions can help clarify how neural tissue maintains signaling balance and how that balance changes during neurological disease or brain injury.