摘要
Objective： The aim of the study was to investigate apoptosis of the autonomic neuron in streptozotocin-induced diabetic rats, and observe the effect of intervention with nerve growth factor （NGF） on the apoptosis. Methods： A total of 29 male Sprague-Dawley rats were divided into three groups, i.e. normal control （NC, n = 12）, untreated diabetic （DM, n = 9） and diabetic treated with NGF daily of 500 μg/kg for 30 days （DM＋NGF, n = 8）. The diabetic rat models were produced by intraperitoneal injection with streptozotocin （65 mg/kg ）. Over 3 months since the diabetes were setup, the superior cervical sympathetic ganglions（SCG） and the celiac ganglions（CG） were removed and fixed with 10% paraformaldchyde. Apoptosis was measured using terminal deoxynucleotidyl transferase-mediated dUTP nick-end labelling（TUNEL）. Apoptotic index （AI） was calculated by computer image analysis system. Results： The AI of SCG and CG in DM and DM＋NGF group were significant higher than those of NC group （P 〈 0.001） respectively. There was no difference of AI of SCG and CG between DM group and DM＋NGF group （both P 〉 0.05）. Conclusion： Neuron apoptosis may contribute to the pathophysiology of diabetic autonomic neuropathy and NGF can not prevent the apoptosis of autonomic neuron in diabetic rats.
Objective： The aim of the study was to investigate apoptosis of the autonomic neuron in streptozotocin-induced diabetic rats, and observe the effect of intervention with nerve growth factor （NGF） on the apoptosis. Methods： A total of 29 male Sprague-Dawley rats were divided into three groups, i.e. normal control （NC, n = 12）, untreated diabetic （DM, n = 9） and diabetic treated with NGF daily of 500 μg/kg for 30 days （DM＋NGF, n = 8）. The diabetic rat models were produced by intraperitoneal injection with streptozotocin （65 mg/kg ）. Over 3 months since the diabetes were setup, the superior cervical sympathetic ganglions（SCG） and the celiac ganglions（CG） were removed and fixed with 10% paraformaldchyde. Apoptosis was measured using terminal deoxynucleotidyl transferase-mediated dUTP nick-end labelling（TUNEL）. Apoptotic index （AI） was calculated by computer image analysis system. Results： The AI of SCG and CG in DM and DM＋NGF group were significant higher than those of NC group （P 〈 0.001） respectively. There was no difference of AI of SCG and CG between DM group and DM＋NGF group （both P 〉 0.05）. Conclusion： Neuron apoptosis may contribute to the pathophysiology of diabetic autonomic neuropathy and NGF can not prevent the apoptosis of autonomic neuron in diabetic rats.
