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Related Concept Videos

Nitric Oxide Signaling Pathway01:28

Nitric Oxide Signaling Pathway

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Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
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Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.
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Neurotransmitters play a crucial role in the communication between neurons in the autonomic nervous system. Neurons in the autonomic nervous system can be cholinergic or adrenergic depending on the neurotransmitters synthesized. Cholinergic neurons use acetylcholine as their primary neurotransmitter. This includes all the preganglionic fibers of the sympathetic and pre- and postganglionic fibers of the parasympathetic nervous systems. In addition, neurons of the somatic nervous system also use...
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Neurotransmitters play a crucial role in the communication between neurons in the autonomic nervous system. Neurons in the autonomic nervous system can be cholinergic or adrenergic depending on the neurotransmitters synthesized. Cholinergic neurons use acetylcholine as their primary neurotransmitter. This includes all the preganglionic fibers of the sympathetic and pre- and postganglionic fibers of the parasympathetic nervous systems. In addition, neurons of the somatic nervous system also use...
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Neurochemical transmission, the conduction of electrical impulses between neurons mediated by neurotransmitters, plays a vital role in various physiological processes. Autonomic drugs exert their effects by modulating neurotransmission within the autonomic nervous system. For instance, drugs such as hemicholinium block the precursor uptake necessary for synthesizing acetylcholine, an essential autonomic neurotransmitter. Following synthesis, neurotransmitters are stored in vesicles. Metyrosine...
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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.
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Related Experiment Video

Updated: Dec 26, 2025

Application of Genetically Encoded Fluorescent Nitric Oxide (NO&#8226;) Probes, the geNOps, for Real-time Imaging of NO&#8226; Signals in Single Cells
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Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells

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Nitric oxide as a multimodal brain transmitter.

John Garthwaite1

  • 1Wolfson Institute for Biomedical Research, University College London, London, UK.

Brain and Neuroscience Advances
|March 14, 2020
PubMed
Summary

Nitric oxide (NO) is a key signaling molecule in the brain, involved in diverse roles from development to adulthood. Its unique properties allow for both localized and widespread signaling pathways.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Physiology

Background:

  • Nitric oxide (NO) emerged as a crucial signaling molecule ~30 years ago.
  • It plays significant roles in cardiovascular, nervous, and immune systems.
  • NO is synthesized in most mammalian brain regions, impacting development and adulthood.

Purpose of the Study:

  • To explore the diverse roles and signaling mechanisms of nitric oxide in the mammalian brain.
  • To elucidate the modes of operation for NO signaling.

Main Methods:

  • The abstract does not specify methods, focusing on established knowledge and proposed mechanisms.
  • Discussion of NO synthesis coupling to NMDA receptor activation.
  • Description of NO's mediation via enzyme-linked receptors generating cGMP.
Keywords:
NMDA receptorNitric oxidecGMPretrograde messengersynaptic plasticity

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Main Results:

  • NO exhibits diverse roles in the mammalian brain during development and adulthood.
  • NO synthesis is frequently linked to NMDA receptor activation.
  • NO's physiological effects are primarily mediated by cGMP-generating receptors.

Conclusions:

  • NO operates via two main signaling modes: near synapse-specific and volume transmission.
  • Rapid diffusion and efficient receptor capture enable NO's distinct signaling capabilities.
  • These mechanisms allow NO to impact diverse targets regardless of direct anatomical connections.