In group A,all animals were pretreated with BDM (40 mg/rat) before superior mesenteric artery (SMA) occlusion.

• A 组于SMA 夹闭前静脉推注2，3 丁二酮类化合物（BDM）生理盐水0.；15 m l（每只鼠含BDM 40 m g）；