Paeonol alleviates primary dysmenorrhea in mice via activating CB2R in the uterus

Feb 15, 2020Phytomedicine : international journal of phytotherapy and phytopharmacology

Paeonol reduces menstrual pain in mice by activating a specific receptor in the uterus

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Abstract

Oral administration of paeonol reduced dysmenorrhea pain and inflammatory mediator expression in mouse uterine tissues.

  • Paeonol decreased the levels of PGE2 and TNF-α in the uterus, which are associated with pain and inflammation.
  • It was distributed in lesions of the uterus, indicating localized action.
  • Paeonol nearly completely inhibited uterine contractions induced by oxytocin, high potassium, and calcium.
  • The inhibitory effects of paeonol on uterine contractions were reversed by antagonists of the CB2 receptor and the MAPK pathway.
  • Paeonol blocked calcium channels and reduced calcium influx in uterine smooth muscle cells via CB2 receptors.
  • Molecular docking results indicated that paeonol fits well with the binding site of the CB2 receptor.

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