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Related Concept Videos

Nociception01:44

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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.
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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
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Sensory Functions of the Skin01:16

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Ribonuclease 4 Functions in Nociceptor-Mediated Nerve Homeostasis.

Xiaona Feng1,2, Kaiwen Zhang1, Prach Techameena1

  • 1Laboratory of Neurobiology of Pain & Therapeutics, Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden.

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|March 25, 2026
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Ribonuclease 4 (RNase4) regulates pain sensation by controlling nociceptor function and myelin integrity. This discovery reveals a novel molecular pathway for pain management and nerve repair.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Nociceptor regulation is crucial for pain sensation, but molecular mechanisms are not fully understood.
  • Disruptions in nociceptor function can lead to altered pain perception.

Purpose of the Study:

  • To identify novel molecular regulators of nociceptor identity and function.
  • To investigate the role of ribonuclease 4 (RNase4) in pain sensation and nerve repair.

Main Methods:

  • Selective expression analysis of RNase4 in nociceptor lineages.
  • Phenotypic analysis of RNase4-deficient mice.
  • Single-cell transcriptomic analysis.
  • Neuropathic pain modeling and behavioral assessment.

Main Results:

  • RNase4 is selectively expressed in unmyelinated nociceptors, playing a cell-autonomous role in their function.
  • RNase4 deficiency alters mechanical sensation in a neuropathic pain model.
  • RNase4 influences myelin structural organization in adjacent myelinated axons.

Conclusions:

  • RNase4 acts as a dual regulator of nociceptor biology and myelin integrity.
  • RNase4 represents a potential molecular target for pain regulation and nerve repair strategies.