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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...
579

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Development of Recombinant Proteins to Treat Chronic Pain
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Kv3.1 Interaction with UBR5 Is Required for Chronic Inflammatory Pain.

Ying Zeng1, Meng-Lan Sun1, Di Liu2

  • 1Jiangsu Province Key Laboratory of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application Technology, NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Tong Shan Road no. 209, Xuzhou, 221004, Jiangsu Province, China.

Molecular Neurobiology
|June 12, 2024
PubMed
Summary

Kv3.1 protein levels decrease in inflammatory pain, causing neuronal hyperactivity. Restoring Kv3.1 alleviates pain by inhibiting UBR5-mediated degradation, offering a new therapeutic target for chronic pain.

Keywords:
Chronic inflammatory painDorsal spinal hornKv3.1Peptide interferenceUBR5

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pain Research

Background:

  • Chronic inflammatory pain is a refractory condition often linked to neuronal hyperactivity.
  • Kv3.1 channels are crucial for high-frequency neuronal firing but their role in pain is unclear.

Purpose of the Study:

  • To investigate the role of Kv3.1 in inflammatory pain.
  • To identify mechanisms regulating Kv3.1 expression in pain.
  • To explore Kv3.1 as a therapeutic target for inflammatory pain.

Main Methods:

  • Utilized a complete Freund's adjuvant (CFA) mouse model of inflammatory pain.
  • Assessed Kv3.1 mRNA and protein expression in the dorsal spinal horn.
  • Manipulated Kv3.1 expression and evaluated nociceptive behaviors.
  • Investigated the interaction between Kv3.1 and ubiquitin protein ligase E3 component n-recognin 5 (UBR5).
  • Administered a peptide (TP-CH-401) targeting the Kv3.1-UBR5 interaction.

Main Results:

  • Kv3.1 protein, but not mRNA, decreased in the CFA model.
  • Upregulating Kv3.1 reduced pain behaviors; downregulating Kv3.1 increased them.
  • UBR5 directly binds and promotes Kv3.1 ubiquitination and degradation.
  • TP-CH-401 peptide restored Kv3.1 levels and currents, attenuating pain hypersensitivity.

Conclusions:

  • UBR5-mediated degradation of Kv3.1 is a novel pathway in inflammatory pain.
  • Kv3.1 plays a critical role in regulating nociceptive behavior.
  • Targeting the Kv3.1-UBR5 interaction with peptides like TP-CH-401 is a potential strategy for treating inflammatory pain.