Objective To expose the effect and its potential mechanism of vinpocetine(Vinp) on the restenosis of dia-betic grafted veins. Methods Thirty-six Sprague-Dawley rats were randomized into saline control group and Vinp treat-ment group. The autologous jugular vein to carotid artery transplantation was performed in diabetic model rats. Normal sa-line or Vinp were intraperitoneally injected. The rats were sacrificed at 0, 2 or 4 weeks after surgery, then the grafted veinswere harvested. The pathological sections...