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find Author "YU Ailin" 1 results
  • Establishment and Evaluation of Ischemic Hind Limb Model in Type 2 Diabetic Rats

    Objective To establish and evaluate the hind limb ischemia model in type 2 diabetic rats, and to providea platform for subsequent intervention experiment. Methods Fifteen SD rats were randomly divided into 3 groups:normal control group, diabetes group, and diabetic ischemia group, each group enrolled 5 rats. The 10 rats of later 2 groups were fed with high fat diet for 4 weeks, and then received intraperitoneal injection of streptozotocin (40 mg/kg) to establish type 2 diabetic model. Three days later, the rats of diabetic ischemia group underwent ligation of the bilateral common iliac artery to establish the hind limb ischemia model, but iliac artery of rats in other 2 groups didn’t received ligation. Ultrasound and color Doppler flow imaging detection was used to determine the peak velocity and acceleration time of femoral artery in rats of 3 groups in 2 weeks after operation, and triceps tissues and quadriceps tissues were collected to perform HE staining and SP staining for the observation on status of nutrition and vascular regeneration respectively. Results The peak velocity of femoral artery in rats of normal control group, diabetes group, and diabetic ischemia group were (22.49±3.02) cm/s, (17.36±2.60) cm/s, and (11.23±1.26) cm/s, the acceleration time were (0.080±0.009) s,(0.120±0.009)s, and(0.160±0.020) s, the arteriolar density measured by immunohistochemistry SP method were 6.80±0.84/HPF, 4.60±0.55/HPF, and 1.40±0.55/HPF respectively. The peak velocity of femoral artery and arteriolar density of rats in diabetic ischemia group were both lower (P<0.05), but acceleration time was longer (P<0.05). Results of HE staining showed that structure of triceps tissues was damaged, with infiltration of lots of inflamm-atory cells, which was worse than normal control group and diabetes group. Conclusion Method of high-fat diet in combination with small dose of streptozotocin can induce type 2 diabetic rat model, and hind limb ischemia model can be successfully established by ligation of common iliac artery on this model.

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