Effects of Hypericum perforatum extract in a rat model of ischemia and reperfusion injury

Rosanna De Paola, Carmelo Muià, Emanuela Mazzon, Tiziana Genovese, Concetta Crisafulli, Marta Menegazzi, Achille P. Capuli, Hisanori Suzuki, Salvatore Cuzzocrea

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Oxidative stress results from an oxidant/antioxidant imbalance, an excess of oxidants, and/or a depletion of antioxidants. A considerable body of recent evidence suggests that oxidative stress and exaggerated production of reactive oxygen species play a major role in several aspects ischemia and reperfusion. Hypericum perforatum is a medicinal plant species containing many polyphenolic compounds, namely flavonoids and phenolic acids. Because polyphenolic compounds have high antioxidant potential, in this study we evaluated the effect of H. perforatum extract on splanchnic artery occlusion (SAO) shock-mediated injury. SAO shock was induced in rats by clamping the superior mesenteric artery and the celiac trunk for 45 min. After 1 h of reperfusion, SAO-shocked rats developed a significant fall in mean arterial blood pressure. Treatment of rats with H. perforatum extract (applied at 25 mg/kg 15 min before reperfusion) significantly reduced a significant fall in mean arterial blood pressure and the migration of polymorphonuclear cells caused by SAO-shock. H. perforatum extract also attenuated the iteum injury (histology) as welt as the increase in the tissue levels of myeloperoxidase and malondialdehyde caused by SAO shock in the ileum. Immunohistochemical analysis for nitrotyrosine and for poly ADP-ribosylated proteins revealed a positive staining in ileum from SAO-shocked rats. The degree of staining for nitrotyrosine and poly ADP-ribosylated proteins was markedly reduced in tissue sections obtained from SAO-shocked rats that had received H. perforatum extract. Reperfused ileum tissue sections from SAO-shocked rats showed positive staining for P-selectin and for intercellular adhesion molecule-1 in the vascular endothelial cells. H. perforatum extract treatment markedly reduced the intensity and degree of P-selectin and intercellular adhesion molecule-1 in tissue section from SAO-shocked rats. H. perforatum extract treatment significantly improved survival. In conclusion, this study demonstrates that H. perforatum extract exerts multiple protective effects in splanchnic artery occlusion-reperfusion shock and suggests that H. perforatum extract may be a candidate for consideration as a therapeutic intervention for ischemia-reperfusion injury.

Original languageEnglish
Pages (from-to)255-263
Number of pages9
Issue number3
Publication statusPublished - Sep 2005


  • Hypericum perforatum extract
  • Neutrophil infiltration
  • Splanchnic artery occlusion shock

ASJC Scopus subject areas

  • Physiology
  • Critical Care and Intensive Care Medicine

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    De Paola, R., Muià, C., Mazzon, E., Genovese, T., Crisafulli, C., Menegazzi, M., Capuli, A. P., Suzuki, H., & Cuzzocrea, S. (2005). Effects of Hypericum perforatum extract in a rat model of ischemia and reperfusion injury. Shock, 24(3), 255-263. https://doi.org/10.1097/01.shk.0000175428.57769.34