Glutamate Receptor Internalization
Glutamate Receptor Internalization - Related Videos
05:27
An In Vitro Technique to Study Glutamate Receptor Trafficking in Hippocampal Neurons
0 Views •
2025
This video demonstrates an antibody-feeding approach to study the trafficking of glutamate receptors in primary hippocampal neuronal cultures. This approach allows the observation of receptor populations at both the plasma and internal membranes. Discrimination between these subsets is achieved by labeling the receptors before and after membrane permeabilization, using the same primary antibody but secondary antibodies conjugated to different fluorophores.
01:56
Internal Receptors
0 Views •
2021
Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas. Similar to membrane-bound receptors, binding of a ligand to a receptor located in the cytoplasm or nucleus of a cell...
01:56
Internal Receptors
0 Views •
2026
Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas. Similar to membrane-bound receptors, binding of a ligand to a receptor located in the cytoplasm or nucleus of a cell...
01:07
Types of Receptors: Internal Receptors
0 Views •
2023
Many cellular signals are hydrophilic and cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind intracellular receptors that reside within the cell cytoplasm or nucleus. Many mammalian steroid hormones and nitric oxide (NO) gas use this cell signaling mechanism. Similar to membrane-bound receptors, the binding of a ligand to the intracellular receptor of causes a conformational change in the...
09:49
Combined Optogenetic and Freeze-fracture Replica Immunolabeling to Examine Input-specific Arrangement of Glutamate Receptors in the Mouse Amygdala
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Cited by 6 •
2016
This article illustrates how the expression of neurotransmitter receptors can be quantified and the pattern analyzed at synapses with identified pre and postsynaptic elements using a combination of viral transduction of optogenetic tools and the freeze-fracture replica immunolabeling technique.
FAQs
Neuronal activity acts as a regulatory signal for changing the number of glutamate receptors exposed at the cell surface. When activity promotes internalization, fewer receptors remain available to participate in excitatory synaptic communication. Measuring this activity-dependent change therefore helps connect cellular receptor trafficking with changes in synaptic strength and plasticity.
Endocytic machinery provides the capture and enclosure step: it gathers receptor proteins from the neuronal membrane and packages them into intracellular vesicles. Vesicular transport then separates the initial removal event from the receptor’s eventual fate. This organization allows cells to regulate surface signaling while directing receptors toward recycling or degradation.
The two routes imply different effects on receptor availability. Recycling can return receptors to the neuronal surface, supporting restoration or adjustment of synaptic responsiveness, whereas degradation removes them from the usable receptor pool for a longer-lasting change. Comparing these outcomes helps researchers interpret whether altered signaling reflects temporary trafficking or more persistent receptor loss.
Researchers can examine the process as linked stages: activity-dependent receptor capture at the cell surface, enclosure within membrane vesicles, transport into intracellular compartments, and subsequent recycling or degradation. Separating these stages helps identify whether a change occurs during removal, transport, or receptor fate, rather than treating all reduced surface availability as the same event.
By changing the number of receptors available at excitatory synapses, this trafficking can alter how strongly those synapses respond to neuronal activity. Such regulation provides a cellular route for activity-dependent plasticity, in which synaptic communication changes over time. Because plasticity is associated with learning and memory, receptor trafficking is a key focus in neuroscience studies of these processes.
When regulation of receptor removal is disrupted, excitatory synaptic signaling can become improperly controlled. That disruption may alter receptor availability at synapses and interfere with activity-dependent plasticity. Consequently, studies of abnormal internalization help connect molecular trafficking changes with broader research on neurological and psychiatric disorders, especially when investigators examine how altered trafficking affects communication and synaptic strength.