Synaptic Remodeling
Synaptic Remodeling - Related Videos
02:54
Nucleosome Remodeling
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2020
Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure. Nucleosome remodeling complex Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
08:46
Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes
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Cited by 18 •
2010
FM dyes have been of invaluable help in the understanding of synaptic dynamics. FMs are normally followed under the fluorescent microscope during different stimulation conditions. However, photoconversion of FM dyes combined with electron microscopy allows the visualization of distinct synaptic vesicle pools, among other ultrastructure components, in synaptic boutons.
07:13
Experience-Dependent Remodeling of Juvenile Brain Olfactory Sensory Neuron Synaptic Connectivity in an Early-Life Critical Period
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Cited by 7 •
2024
We describe here methods for inducing and analyzing olfactory experience-dependent remodeling of antennal lobe synaptic glomeruli in the Drosophila juvenile brain.
08:38
Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals
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Cited by 17 •
2011
This report demonstrates a technique for mechanical isolation of individual viable neurons retaining attached presynaptic boutons. Vibrodissociated neurons have the advantages of rapid production, excellent pharmacological control and improved space-clamp without influence from neighboring cells. This method can be used for imaging of synaptic elements and patch-clamp recording.
12:22
Automated Quantification of Synaptic Fluorescence in C. elegans
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Cited by 5 •
2012
The abundance of neurotransmitter receptors clustered at synapses strongly influences synaptic strength. This method quantifies fluorescently-labeled neurotransmitter receptors in three dimensions with single-synapse resolution in C. elegans, allowing hundreds of synapses to be rapidly characterized within a single sample without distortions introduced by z-plane projection.
FAQs
Long-term potentiation, or LTP, strengthens synaptic signaling, whereas long-term depression, or LTD, weakens it. Their opposing effects allow neural circuits to adjust connection strength rather than change uniformly in one direction. Together, these mechanisms help link activity patterns with lasting changes relevant to learning, memory, and adaptation to sensory experience.
Several components can change together: neurotransmitter release, the abundance of receptors on the receiving neuron, and the structure of dendritic spines. These changes alter how effectively neurons communicate and can support either stronger or weaker connections. Examining all three provides a more complete view than considering synaptic strength as a single isolated property.
Synaptic remodeling is activity-dependent, so patterns of neural activity help determine whether connections are modified. Active connections may be strengthened or formed, while other connections may be weakened or eliminated. This selective reorganization enables circuits to adapt over time and helps explain how sensory experience can influence neural structure and function.
Eliminating synapses is important because circuit adaptation depends on selecting and reorganizing connections, not simply adding more of them. Formation can expand or establish communication routes, while weakening and elimination can remove less useful connections. This balance allows neural circuits to change their organization over time while supporting functional adaptation.
Researchers can examine changes in neurotransmitter release, receptor abundance, and dendritic spine structure as complementary indicators of synaptic change. They can also consider whether connections are forming, strengthening, weakening, or being eliminated. Relating these features to activity provides a framework for connecting cellular changes with broader changes in circuit function.
It is especially relevant when researchers study brain development, learning, memory, or adaptation to sensory experience. In each context, the central issue is how changing synaptic connections supports evolving circuit function. The same framework also helps investigate how neural networks reorganize over time rather than remaining structurally fixed.
After neural injury, synaptic remodeling may influence recovery by reorganizing connections within affected circuits. Abnormal remodeling is also relevant to addiction, epilepsy, and neurodegenerative disease, where altered synaptic changes may contribute to disease-related circuit dysfunction. Understanding these processes can therefore support efforts to explain pathology and develop targeted therapies.