OBJECTIVE: To study the activity of liver glycogen synthase in analogous model of NIDDM rats. METHODS: Male Wistar rats were injected with low dose of streptozotocin (STZ) (30 mg/kg body weight) via tail vena and thos...OBJECTIVE: To study the activity of liver glycogen synthase in analogous model of NIDDM rats. METHODS: Male Wistar rats were injected with low dose of streptozotocin (STZ) (30 mg/kg body weight) via tail vena and those animals with glucose tolerance impaired and level of insulin equal to or higher than that of the controls at 18th week were taken as the analogous rat model of NIDDM. The activity of liver glycogen synthase (GS) was assayed at the end of experiment. RESULTS: Type I-enzyme: 0.18 +/- 0.06 mumol/min.g versus 0.24 +/- 0.09 mumol/min.g, P展开更多
AIM:In previous experiments we have demonstrated that by administering low doses of cholecystokinin-octapeptide (CCK-8),the process of regeneration following L-arginine (Arg)-induced pancreatitis is accelerated.In rat...AIM:In previous experiments we have demonstrated that by administering low doses of cholecystokinin-octapeptide (CCK-8),the process of regeneration following L-arginine (Arg)-induced pancreatitis is accelerated.In rats that were also diabetic(induced by streptozotocin,STZ),pancreatic regeneration was not observed.The aim of this study was to deduce whether the administration of exogenous insulin could in fact restore the hypertrophic effect of CCK-8 in diabetic-pancreatitic rats. METHODS:Male Wistar rats were used for the experiments. Diabetes mellitus was induced by administering 60mg/kg body mass of STZ intraperitoneally(i.p.),then,on d 8, pancreatitis was induced by 200mg/100 g body mass Arg i.p.twice at an interval of 1 h.The animals were injected subcutaneously twice daily(at 7 a.m.and 7 p.m.)with 1 μg/kg of CCK-8 and/or 2 IU mixed insulin(300g/L short- action and 700g/L intermediate-action insulin) for 14 d after pancreatitis induction.Following this the animals were killed and the serum amylase,glucose and insulin levels as well as the plasma glucagon levels,the pancreatic mass/body mass ratio(pm/bm),the pancreatic contents of DNA,protein,amylase,lipase and trypsinogen were measured.Pancreatic tissue samples were examined by light microscopy on paraffin-embedded sections. RESULTS:In the diabetic-pancreatitic rats treatment with insulin and CCK-8 significantly elevated pw/bm and the pancreatic contents of protein,amylase and lipase vs the rats receiving only CCK-8 treatment.CCK-8 administered in combination with insulin also elevated the number of acinar cells with mitotic activities,whereas CCK-8 alone had no effect on laboratory parameters or the mitotic activities in diabetic-pancreatitic rats. CONCLUSION:Despite the hypertrophic effect of CCK-8 being absent following acute pancreatitis in diabetic-rats, the simultaneous administration of exogenous insulin restored this effect.Our results clearly demonstrate that insulin is necessary for the hypertrophic effect of low-doses of CCK-8 following acute pancreatitis.展开更多
目的探索定量非对称回波的最小二乘估算法迭代水脂分离序列（iterative decomposition of water and fat with echo asymmetry and least-squares estimation quantitation sequence,IDEAL-IQ）定量评估兔糖尿病模型椎体骨髓脂肪含量的...目的探索定量非对称回波的最小二乘估算法迭代水脂分离序列（iterative decomposition of water and fat with echo asymmetry and least-squares estimation quantitation sequence,IDEAL-IQ）定量评估兔糖尿病模型椎体骨髓脂肪含量的可行性。材料与方法12只3月龄新西兰雄性大白兔随机分为糖尿病组（n=6）和对照组（n=6）。用四氧嘧啶对糖尿病组造模,在造模成功后各时间点（0、4、8、12、16周）,对糖尿病组及对照组行腰椎矢状位T1WI、T2WI、IDEAL-IQ检查。在IDEAL-IQ脂肪分数图像测量兴趣区内脂肪含量比值;在16周处死糖尿病组和对照组的大白兔,取腰3~7椎体做HE染色脂肪细胞计数;对实验组和对照组兔各时间点的脂肪含量比值采用重复测量的方差分析;对16周实验组和对照组IDEAL-IQ测量腰椎体脂肪比参数与HE切片镜下脂肪细胞计数行Pearson相关分析。结果16周实验组兔腰椎常规矢状位T1WI和T2WI显示诸腰椎椎体信号轻度增高。常规HE染色显示,16周糖尿病组兔椎体终板下骨髓腔脂肪含量较对照组明显增多,骨髓细胞明显减少。糖尿病组各时间节点椎体骨髓的脂肪含量比值差异存在统计学意义（F=50.387,P〈0.01）,对照组各时间点脂肪含量比值差异不存在统计学意义（F=1.477,P〉0.05）;16周实验组与对照组的椎体骨髓脂肪含量比值（FF%）差异有统计学意义（t=-10.726,P〈0.01）;IDEAL-IQ测量椎体脂肪含量比与脂肪细胞计数高度正相关关系（r=0.925,P〈0.05）。结论 IDEALIQ定量评估兔糖尿病模型椎体骨髓脂肪含量是可行的。.展开更多
文摘OBJECTIVE: To study the activity of liver glycogen synthase in analogous model of NIDDM rats. METHODS: Male Wistar rats were injected with low dose of streptozotocin (STZ) (30 mg/kg body weight) via tail vena and those animals with glucose tolerance impaired and level of insulin equal to or higher than that of the controls at 18th week were taken as the analogous rat model of NIDDM. The activity of liver glycogen synthase (GS) was assayed at the end of experiment. RESULTS: Type I-enzyme: 0.18 +/- 0.06 mumol/min.g versus 0.24 +/- 0.09 mumol/min.g, P
基金Supported by The Wellcome Trust Grant No.022618,and by the Hungarian Scientific Research Fund D42188,T43066 and T042589
文摘AIM:In previous experiments we have demonstrated that by administering low doses of cholecystokinin-octapeptide (CCK-8),the process of regeneration following L-arginine (Arg)-induced pancreatitis is accelerated.In rats that were also diabetic(induced by streptozotocin,STZ),pancreatic regeneration was not observed.The aim of this study was to deduce whether the administration of exogenous insulin could in fact restore the hypertrophic effect of CCK-8 in diabetic-pancreatitic rats. METHODS:Male Wistar rats were used for the experiments. Diabetes mellitus was induced by administering 60mg/kg body mass of STZ intraperitoneally(i.p.),then,on d 8, pancreatitis was induced by 200mg/100 g body mass Arg i.p.twice at an interval of 1 h.The animals were injected subcutaneously twice daily(at 7 a.m.and 7 p.m.)with 1 μg/kg of CCK-8 and/or 2 IU mixed insulin(300g/L short- action and 700g/L intermediate-action insulin) for 14 d after pancreatitis induction.Following this the animals were killed and the serum amylase,glucose and insulin levels as well as the plasma glucagon levels,the pancreatic mass/body mass ratio(pm/bm),the pancreatic contents of DNA,protein,amylase,lipase and trypsinogen were measured.Pancreatic tissue samples were examined by light microscopy on paraffin-embedded sections. RESULTS:In the diabetic-pancreatitic rats treatment with insulin and CCK-8 significantly elevated pw/bm and the pancreatic contents of protein,amylase and lipase vs the rats receiving only CCK-8 treatment.CCK-8 administered in combination with insulin also elevated the number of acinar cells with mitotic activities,whereas CCK-8 alone had no effect on laboratory parameters or the mitotic activities in diabetic-pancreatitic rats. CONCLUSION:Despite the hypertrophic effect of CCK-8 being absent following acute pancreatitis in diabetic-rats, the simultaneous administration of exogenous insulin restored this effect.Our results clearly demonstrate that insulin is necessary for the hypertrophic effect of low-doses of CCK-8 following acute pancreatitis.
文摘目的探索定量非对称回波的最小二乘估算法迭代水脂分离序列（iterative decomposition of water and fat with echo asymmetry and least-squares estimation quantitation sequence,IDEAL-IQ）定量评估兔糖尿病模型椎体骨髓脂肪含量的可行性。材料与方法12只3月龄新西兰雄性大白兔随机分为糖尿病组（n=6）和对照组（n=6）。用四氧嘧啶对糖尿病组造模,在造模成功后各时间点（0、4、8、12、16周）,对糖尿病组及对照组行腰椎矢状位T1WI、T2WI、IDEAL-IQ检查。在IDEAL-IQ脂肪分数图像测量兴趣区内脂肪含量比值;在16周处死糖尿病组和对照组的大白兔,取腰3~7椎体做HE染色脂肪细胞计数;对实验组和对照组兔各时间点的脂肪含量比值采用重复测量的方差分析;对16周实验组和对照组IDEAL-IQ测量腰椎体脂肪比参数与HE切片镜下脂肪细胞计数行Pearson相关分析。结果16周实验组兔腰椎常规矢状位T1WI和T2WI显示诸腰椎椎体信号轻度增高。常规HE染色显示,16周糖尿病组兔椎体终板下骨髓腔脂肪含量较对照组明显增多,骨髓细胞明显减少。糖尿病组各时间节点椎体骨髓的脂肪含量比值差异存在统计学意义（F=50.387,P〈0.01）,对照组各时间点脂肪含量比值差异不存在统计学意义（F=1.477,P〉0.05）;16周实验组与对照组的椎体骨髓脂肪含量比值（FF%）差异有统计学意义（t=-10.726,P〈0.01）;IDEAL-IQ测量椎体脂肪含量比与脂肪细胞计数高度正相关关系（r=0.925,P〈0.05）。结论 IDEALIQ定量评估兔糖尿病模型椎体骨髓脂肪含量是可行的。.
