Protective effects of ellagic acid and ozone on rat ovaries with an ischemia/reperfusion injury

J Obstet Gynaecol Res. 2016 Jan;42(1):52-8. doi: 10.1111/jog.12858. Epub 2015 Nov 10.


Aim: This study investigated the effects of the antioxidant agents, ozone (O) and ellagic acid (EA), on ischemia/reperfusion (I/R) injuries developed from an ovarian torsion-detorsion model.

Materials and methods: Arteries in the left ovaries of rats were clamped for two hours to achieve torsion, and then the clamps were removed for a two-hour detorsion period. Thirty-five female Sprague-Dawley rats were randomly divided into five groups: control: administered only with anesthesia, rats were not subjected to torsion-detorsion; I/R: subjected to torsion and subsequent detorsion, without administering any treatment agent; and I/R + EA, I/R + O and I/R + O + EA: subjected to torsion and detorsion processes and administered with EA, O or EA + O at the 75th minute of torsion. The rats were then sacrificed under general anesthesia and the ovarian tissues were excised. The tissues were homogenized and levels of glutathione reductase, catalase, superoxide dismutase and malondialdehyde (MDA) were analyzed. Tissue damage was evaluated in terms of histopathological parameters, such as hemorrhage, congestion, edema and inflammation.

Results: Antioxidant enzyme activity and MDA levels in the ovary tissue increased in the I/R group and decreased in the O, EA and O + EA groups (P < 0.05). Histopathological examination revealed that tissue damage in the O, EA and O + EA groups decreased in comparison with the I/R group (P < 0.05).

Conclusions: These biochemical and histopathological findings suggest that EA and O are effective against ovarian I/R injury.

Keywords: ellagic acid; immunohistochemistry; ischemia/reperfusion; ovary; ozone.

MeSH terms

  • Animals
  • Antioxidants / pharmacology
  • Antioxidants / therapeutic use*
  • Catalase / metabolism
  • Ellagic Acid / pharmacology
  • Ellagic Acid / therapeutic use*
  • Female
  • Glutathione Reductase / metabolism
  • Humans
  • Malondialdehyde / metabolism
  • Ovarian Diseases / drug therapy*
  • Ovarian Diseases / metabolism
  • Ovary / blood supply
  • Ovary / drug effects
  • Oxidative Stress / drug effects
  • Ozone / pharmacology
  • Ozone / therapeutic use*
  • Protective Agents / pharmacology
  • Protective Agents / therapeutic use*
  • Rats
  • Rats, Sprague-Dawley
  • Reperfusion Injury / drug therapy*
  • Reperfusion Injury / metabolism
  • Superoxide Dismutase / metabolism
  • Torsion Abnormality / drug therapy*
  • Torsion Abnormality / metabolism
  • Treatment Outcome


  • Antioxidants
  • Protective Agents
  • Ellagic Acid
  • Malondialdehyde
  • Ozone
  • Catalase
  • Superoxide Dismutase
  • Glutathione Reductase