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Related Concept Videos

Analgesia and Pain Management01:25

Analgesia and Pain Management

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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...
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Drug Discovery: Overview01:26

Drug Discovery: Overview

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Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
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Nociception01:44

Nociception

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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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Pain01:20

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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Non-gated Ion Channels01:24

Non-gated Ion Channels

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Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
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Related Experiment Video

Updated: Sep 11, 2025

Determining Pain Detection and Tolerance Thresholds Using an Integrated, Multi-Modal Pain Task Battery
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Determining Pain Detection and Tolerance Thresholds Using an Integrated, Multi-Modal Pain Task Battery

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Decoding Pain: Next-Generation In Vitro Systems for Mechanistic Insights and Drug Discovery.

Dara Khosrowshahi1,2, Liesbet Lagae1,2, Johanna Bolander2,3,4

  • 1Department of Physics and Astronomy, KU Leuven, Leuven, Belgium.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|August 15, 2025
PubMed
Summary
This summary is machine-generated.

Developing advanced in vitro pain models using human induced pluripotent stem cells (iPSCs) offers a promising avenue for understanding chronic pain mechanisms and creating effective analgesics.

Keywords:
analgesicschronic painco‐culturein vitro pain modelsinduced pluripotent stem cellsnociceptors

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Area of Science:

  • Neuroscience
  • Biotechnology
  • Pharmacology

Background:

  • Chronic pain impacts 20% of the population, with limited analgesic efficacy due to poor understanding of pain pathophysiology.
  • Current in vivo models have limitations in studying human pain mechanisms, hindering drug development.
  • Physiologically relevant in vitro models are crucial for studying human cells and advancing translational research.

Purpose of the Study:

  • To review molecular mechanisms of pain and cell crosstalk in the nervous system.
  • To evaluate current in vivo pain models and their limitations.
  • To explore in vitro modeling strategies using human induced pluripotent stem cells (iPSCs) for pain research.

Main Methods:

  • Review of molecular pain mechanisms and cell signaling.
  • Analysis of existing in vivo pain models.
  • Exploration of in vitro models using iPSC-derived human nociceptors.
  • Assessment of in vitro model validation techniques (electrophysiology, assays).
  • Examination of coculture models mimicking in vivo microenvironments.

Main Results:

  • Human iPSCs can be differentiated into functional nociceptors for in vitro studies.
  • Advanced in vitro models, including cocultures, better replicate human pain physiology.
  • Electrophysiological characterization and specific assays validate these in vitro systems.
  • These models facilitate the study of nociceptor-non-neuronal cell interactions.

Conclusions:

  • In vitro models using iPSCs are essential for understanding human pain mechanisms.
  • These models improve the screening and development of novel analgesics with fewer side effects.
  • Further development is needed to enhance the predictability and relevance of in vitro pain models.