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Nociception

Nociception

Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain.

Pain

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Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...

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Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...

Nitric Oxide Signaling Pathway

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Related Experiment Video

Updated: Sep 6, 2025

Optimizing Photoneuromodulation Techniques to Evaluate the Role of Green Light-Emitting Diodes in Pain Management

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NADPH Oxidases in Pain Processing.

Wiebke Kallenborn-Gerhardt¹, Katrin Schröder^2,3, Achim Schmidtko¹

¹Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany.

Antioxidants (Basel, Switzerland)

|June 24, 2022

Summary

Reactive oxygen species (ROS) from NADPH oxidases (Nox1, Nox2, Nox4) are key in chronic pain. Targeting these Nox enzymes offers a potential new strategy for treating inflammatory and neuropathic pain.

Keywords:

NADPH oxidase Nox Nox inhibition inflammation neuropathy nociception pain peripheral injury

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Last Updated: Sep 6, 2025

Optimizing Photoneuromodulation Techniques to Evaluate the Role of Green Light-Emitting Diodes in Pain Management

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Published on: March 28, 2025

Bioluminescence Imaging of NADPH Oxidase Activity in Different Animal Models

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Published on: October 22, 2012

Chronic Post-Ischemia Pain Model for Complex Regional Pain Syndrome Type-I in Rats

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Published on: January 21, 2020

Area of Science:

Neuroscience
Biochemistry
Pharmacology

Background:

Chronic pain conditions arise from somatosensory nervous system inflammation or injury.
Reactive oxygen species (ROS) act as signaling molecules in pain processing.
NADPH oxidases (Nox) are primary sources of ROS in the nervous system.

Purpose of the Study:

To summarize the distinct roles of Nox1, Nox2, and Nox4 in pain pathways.
To discuss the therapeutic potential of Nox inhibitors for chronic pain.

Main Methods:

Review of studies on Nox1, Nox2, and Nox4 expression and function in pain.
Analysis of data from knockout mice and knockdown experiments.
Evaluation of current Nox inhibitor development and application.

Main Results:

Nox1, Nox2, and Nox4 are expressed in the nociceptive system.
These Nox isoforms contribute to distinct signaling pathways in chronic pain.
Targeting specific Nox enzymes shows promise for pain management.

Conclusions:

Nox enzymes play specific roles in inflammatory and neuropathic pain.
Selective Nox inhibitors represent a novel therapeutic strategy for chronic pain.