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Related Concept Videos

Neuronal Communication01:28

Neuronal Communication

Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
Adrenergic Neurons: Neurotransmission01:27

Adrenergic Neurons: Neurotransmission

Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism.
Synthesis: Catecholamine synthesis requires tyrosine, which is taken...
Neurons as Communicators of the Brain01:22

Neurons as Communicators of the Brain

Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
Synaptic Signaling01:09

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Synaptic Signaling01:12

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Neurons: The Axon01:21

Neurons: The Axon

Axons are long, cytoplasmic processes of nerve cells capable of propagating electrical impulses known as action potentials. The cytoplasm or axoplasm of an axon contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes, all encased within the axolemma, the plasma membrane of the axon.
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment.

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Updated: May 24, 2026

Isolation and Quantification of Axonal mRNAs Using Porous Membrane Inserts and RTddPCR
07:06

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Published on: February 6, 2026

Neuronal mRNAs travel singly into dendrites.

Mona Batish1, Patrick van den Bogaard, Fred Russell Kramer

  • 1Public Health Research Institute and Department of Microbiology and Molecular Genetics, New Jersey Medical School, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103, USA.

Proceedings of the National Academy of Sciences of the United States of America
|March 7, 2012
PubMed
Summary
This summary is machine-generated.

Messenger RNA (mRNA) molecules travel alone to synapses in neurons. This independent transport allows for precise control of protein synthesis at individual neuronal connections, crucial for brain plasticity.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • RNA granules transport repressed mRNAs to dendrites for localized translation.
  • Synaptic activity regulates the translation of these mRNAs.
  • The stoichiometry and assembly of mRNAs within neuronal granules remain poorly understood.

Purpose of the Study:

  • To investigate the stoichiometry and colocalization of different mRNA species within neuronal transport granules.
  • To determine if mRNAs with common localization elements form common complexes.
  • To elucidate the transport dynamics of mRNAs in dendrites.

Main Methods:

  • Single-molecule imaging of nine distinct dendritically localized mRNA species.
  • Utilizing subdiffraction-limit resolution microscopy.
  • Experiments conducted in cultured hippocampal neurons.

Main Results:

  • Individual mRNA molecules, whether of the same or different species, do not assemble into common structures within granules.
  • Even mRNAs sharing common dendritic localization elements do not colocalize.
  • Evidence suggests mRNAs traffic singly and independently within dendrites.

Conclusions:

  • mRNA molecules are transported individually to dendritic sites, not in preassembled complexes.
  • This independent trafficking model allows for fine-tuned regulation of synaptic mRNA content.
  • Independent mRNA transport supports synaptic plasticity through precise control of local protein synthesis.