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Bradykinin and inflammatory pain

A Dray1, M Perkins

  • 1Sandoz Institute for Medical Research, London, UK.

Trends in Neurosciences
|March 1, 1993
PubMed
Summary
This summary is machine-generated.

Bradykinin (BK) contributes to pain and inflammation. While BK B2 receptors are key in acute pain, BK B1 receptors may maintain hyperalgesia during prolonged inflammation.

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Pharmacology

Background:

  • Bradykinin (BK) is implicated in tissue damage, inflammation, pain, and hyperalgesia.
  • Hyperalgesia mechanisms include direct nociceptor activation and sensitization via prostanoids or other mediators.
  • BK B2 receptor antagonists show efficacy in acute inflammatory pain and inflammation.

Purpose of the Study:

  • To explore the role of bradykinin receptors in pain and inflammation.
  • To investigate the involvement of BK B1 receptors in prolonged inflammatory hyperalgesia.

Main Methods:

  • Review of existing evidence on bradykinin's role in pain pathways.
  • Analysis of proposed mechanisms for hyperalgesia.
  • Consideration of the therapeutic potential of BK receptor antagonists.

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Main Results:

  • BK B2 receptor antagonists are effective for acute inflammatory pain.
  • BK B1 receptors, typically absent in healthy tissue, may contribute to hyperalgesia in chronic inflammation.
  • This suggests adaptive mechanisms in the peripheral and central nervous systems.

Conclusions:

  • Bradykinin signaling, particularly through B1 and B2 receptors, is crucial in inflammatory pain.
  • BK B1 receptors emerge as significant contributors to persistent hyperalgesia.
  • Understanding these pathways offers targets for novel analgesic and anti-inflammatory therapies.