Fu SL, Zhu HM, Zheng L. Establishment of a Beagle dog model of obesity and type 2 diabetes.
Shijie Huaren Xiaohua Zazhi 2011;
19:2534-2539. [DOI:
10.11569/wcjd.v19.i24.2534]
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Abstract
AIM: To establish a big animal model of obesity and type 2 diabetes for further investigation of surgical or endoscopic interventional therapy of this disease.
METHODS: Ten healthy adult male Beagle dogs were randomly and equally divided into two groups: control group and model group. The control group was feed a standard diet during the whole experiment (16 wk), while the model group was feed a high-fat hypercaloric diet. At week 8, the model group was intravenously injected with small dose of streptozotocin (STZ). The body mass, length, fasting blood glucose, intravenous glucose tolerance test (IVGTT), and lipid were measured regularly.
RESULTS: At week 8, the average body mass (16.9 kg ± 0.8 kg vs 14.8 kg ± 1.03 kg, P < 0.01), Lee index (P < 0.05), serum insulin and c-peptide (both P < 0.01) were significantly higher in the model group than in the control group. One week after STZ injection, in the model group, the fast blood glucose was significantly higher than that in the control group (P < 0.05), IVGTT-2 h glucose was significantly higher than the pre-injection value (143 mg/dL ± 7.4 mg/dL vs 127 mg/dL ± 4.2 mg/dL, P < 0.05), and serum insulin and c-peptide decreased significantly (P < 0.01). Eight weeks after STZ injection, in the model group, the fast blood glucose was significantly higher than that in the control group (P < 0.01), and IVGTT-2h glucose was significantly higher than the pre-injection value (323 mg/dL ± 12.1 mg/dL vs 127 mg/dL ± 4.2 mg/dL, P < 0.01). All Beagle dogs were confirmed to have type 2 diabetes, and no Beagle dogs died during the experimental period.
CONCLUSION: A high-fat hypercaloric diet combined with intravenous injection of small dose of STZ can induce obesity and type 2 diabetes in Beagle dogs. This animal model mimics the nature history and metabolic characteristics of human type 2 diabetes and can be used for further investigation of surgical or endoscopic interventional therapy of obesity and type 2 diabetes.
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