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Related Concept Videos

Neuron Structure01:31

Neuron Structure

Overview
Neuron Structure01:30

Neuron Structure

Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
Structure and Function of Neurons
The neuronal cell body—the soma— houses the nucleus and organelles vital to cellular...
Neurons: The Cell Body and the Dendrites01:23

Neurons: The Cell Body and the Dendrites

A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...
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...
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.
Nervous Tissue: Neuron Types01:19

Nervous Tissue: Neuron Types

Neurons, the fundamental units of the nervous system, can be classified based on both their structural and functional characteristics.
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...

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Defining a neuron: neuronal ELAV proteins.

A Pascale1, M Amadio, A Quattrone

  • 1Department of Experimental and Applied Pharmacology, University of Pavia, Via Taramelli 14, 27100, Pavia, Italy. alessia.pascale@unipv.it

Cellular and Molecular Life Sciences : CMLS
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Neuronal ELAV (nELAV) proteins, a type of RNA-binding protein, are crucial for neuronal gene expression, aiding in cell development and memory formation by controlling mRNA. These proteins enhance gene expression by increasing mRNA stability and promoting protein synthesis.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Neuronal cells rely on RNA-binding proteins (RBPs) for gene expression control, essential for maintaining their phenotype.
  • Neuronal ELAV (nELAV) proteins are key RBPs influencing mRNA processing, including polyadenylation, splicing, export, localization, stability, and translation.
  • nELAV proteins enhance gene expression by increasing mRNA half-life and promoting protein synthesis via an unelucidated mechanism.

Purpose of the Study:

  • To investigate the role of nELAV proteins in neuronal development and function.
  • To elucidate the molecular mechanisms by which nELAV proteins regulate gene expression.
  • To explore the involvement of nELAV proteins in cognitive processes like memory.

Main Methods:

  • The study likely involved analyzing nELAV protein interactions with mRNA targets.
  • Methods may include techniques like RNA immunoprecipitation (RIP), gene expression analysis (e.g., RNA-seq), and functional assays in neuronal models.
  • Investigating nELAV's role in neural stem cell differentiation and mature neuron function.

Main Results:

  • nELAV proteins act as inducers for the transition from neural stem/progenitor cells to differentiation-committed cells.
  • They assist neuroblasts in completing their maturation program.
  • nELAV proteins play a pivotal role in memory by controlling mRNA availability for translation in specific subcellular domains, enhancing synaptic strength.

Conclusions:

  • nELAV proteins are critical regulators of neuronal gene expression throughout development and in mature brain function.
  • Their functions include promoting neuronal differentiation, maturation, and synaptic plasticity underlying memory.
  • Further research is needed to fully understand the molecular mechanisms of nELAV-mediated translation enhancement.