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Related Concept Videos

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

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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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Analgesia and Pain Management01:25

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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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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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Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
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Tissue Preparation and Immunostaining of Mouse Sensory Nerve Fibers Innervating Skin and Limb Bones
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Nerve Growth Factor Signaling and Its Contribution to Pain.

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Area of Science:

  • Neuroscience
  • Pain Research
  • Molecular Biology

Background:

  • Nerve growth factor (NGF) is crucial for neuronal development and survival.
  • NGF plays a significant role in adult nociception (pain signaling).
  • This has led to the development of novel analgesics targeting the NGF pathway.

Purpose of the Study:

  • To review how NGF receptor activation and downstream signaling influence nociception.
  • To summarize NGF's role in direct nociceptor sensitization and gene expression changes.
  • To highlight NGF as a therapeutic target for chronic pain.

Main Methods:

  • Narrative review of existing animal and human studies.
  • Analysis of NGF's effects on nociceptors and gene expression in dorsal root ganglia.
  • Examination of NGF's role in inflammatory mediator release and neuronal sprouting.

Main Results:

  • NGF directly sensitizes nociceptors at injury sites.
  • NGF alters gene expression in dorsal root ganglia, enhancing pain signaling.
  • NGF influences inflammatory mediators, ion channel activity, and neuronal sprouting, contributing to pain.

Conclusions:

  • NGF has a complex, multifunctional role in nociceptive processing.
  • While pathways are complex and not fully understood, NGF significantly modulates pain.
  • NGF is a validated and attractive therapeutic target for chronic pain conditions.