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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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Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Related Experiment Video

Updated: Jun 26, 2025

The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice
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Aging-associated decrease of PGC-1α promotes pain chronification.

Xinbo Wu1, Liuyue Yang1, Zihua Li1

  • 1Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Aging Cell
|May 18, 2024
PubMed
Summary
This summary is machine-generated.

Aging decreases PGC-1α in the brain, worsening chronic pain in older mice. Restoring PGC-1α in the primary somatosensory cortex (S1) alleviates this pain, offering a potential therapeutic target for chronic pain in aging populations.

Keywords:
PGC‐1αagingmicepainsomatosensory cortex

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Area of Science:

  • Neuroscience
  • Aging Research
  • Pain Management

Background:

  • Aging typically reduces somatosensory function, yet chronic pain is prevalent in older adults.
  • The role of the primary somatosensory cortex (S1) in age-related pain processing and chronification remains unclear.
  • Degenerative conditions like osteoarthritis contribute to pain in aging populations.

Purpose of the Study:

  • To investigate how aging affects pain processing in the primary somatosensory cortex (S1).
  • To determine if aging alters neural dynamics in S1 and promotes pain chronification.
  • To explore the role of peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) in age-related pain.

Main Methods:

  • Utilized aged and mature adult mice models with nerve injury.
  • Measured nociceptive behavior and analyzed PGC-1α expression in S1.
  • Employed intravital two-photon calcium imaging to assess S1 neural dynamics.
  • Used chemogenetics and viral vectors to manipulate S1 interneuron activity and PGC-1α levels.

Main Results:

  • Older mice exhibited prolonged nociceptive behavior post-nerve injury compared to younger mice.
  • Decreased PGC-1α expression in S1 of older mice correlated with prolonged pain.
  • Both aging and PGC-1α deficiency led to altered S1 neural dynamics.
  • Modulating S1 interneuron activity and PGC-1α levels impacted nociceptive behavior and neural dynamics.

Conclusions:

  • Aging-associated reduction in PGC-1α in S1 contributes to pain chronification.
  • Altering S1 neural dynamics, particularly PGC-1α levels in interneurons, can ameliorate age-related chronic pain.
  • Targeting PGC-1α in S1 offers a potential strategy for managing chronic pain in older individuals.