Abstract

Intestinal ischemia and reperfusion (I/R) is a clinical problem occurred for diverse causes with high mortality. The present study was to explore the role of Notoginsenoside R1 (R1), a major component form Panax. Notoginseng, in management of intestinal I/R injury. Intestinal I/R was induced in male Sprague‐Dawley rats by clamping the superior mesenteric artery for 90 min followed by reperfusion for 60 min or 3 days. R1 (10 mg/kg/h) was administered either 20 min before ischemia or 20 min after reperfusion. Intestinal microcirculation was evaluated by intravital microscopy over 60 min reperfusion. Sixty min or 3 days after reperfusion, rats were killed for histological examination of the jejunum tissue and immunohistochemical localization of myeloperoxidase and CD68. ATP, ADP and AMP content in jejunum tissue was assessed by ELISA. Activation of NF‐κB, expression of ATP5D and tight junction proteins were determined by Western blotting. The results demonstrated that R1 is capable of attenuating intestinal I/R‐induced microvascular hyperpermeability, inflammatory cytokine production, NF‐κB activation and loss of tight junction proteins, as well as improving energy metabolism during I/R. The results of the present study suggest R1 as an option in protecting against intestinal I/R injury.

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