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Production of a mouse strain with impaired glucose tolerance by systemic heterozygous knockout of the glucokinase gene and its feasibility as a prediabetes model

机译:通过全身性杂合性敲除葡萄糖激酶基因产生具有葡萄糖耐量受损的小鼠品系及其作为糖尿病前期模型的可行性

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Exon II of glucokinase ( Gk ) was deleted to produce a systemic heterozygous Gk knockout ( Gk +/?) mouse. The relative expression levels of Gk in the heart, lung, liver, stomach, and pancreas in Gk +/? mice ranged from 0.41–0.68 versus that in wild ( Gk +/+) mice. On the other hand, its expression levels in the brain, adipose tissue, and muscle ranged from 0.95–1.03, and its expression levels in the spleen and kidney were nearly zero. Gk knockout caused no remarkable off-target effect on the expression of 7 diabetes causing genes ( Shp , Hnf1a , Hnf1b , Irs1 , Irs2 , Kir6.2 , and Pdx1 ) in 10 organs. The glucose tolerance test was conducted to determine the blood glucose concentrations just after fasting for 24 h (FBG) and at 2 h after high-glucose application (GTT2h). The FBG-GTT2h plots obtained with the wild strain fed the control diet (CD), Gk +/? strain fed the CD, and Gk +/? strain fed the HFD were distributed in separate areas in the FBG-GTT2h diagram. The respective areas could be defined as the normal state, prediabetes state, and diabetes state, respectively. Based on the results, the criteria for prediabetes could be defined for the Gk +/? strain developed in this study.
机译:删除葡萄糖激酶(Gk)的外显子II,以产生全身性杂合性Gk敲除(Gk + /?)小鼠。 Gk + /?小鼠在心脏,肺,肝,胃和胰腺中Gk的相对表达水平在0.41-0.68之间,而在野外(Gk + / + )小鼠。另一方面,它在脑,脂肪组织和肌肉中的表达水平在0.95-1.03之间,在脾脏和肾脏中的表达水平几乎为零。 Gk基因敲除对10个器官中的7种糖尿病致病基因(Shp,Hnf1a,Hnf1b,Irs1,Irs2,Kir6.2和Pdx1)的表达没有明显的脱靶作用。禁食24小时后(FBG)和高糖应用后2小时(GTT2h)进行葡萄糖耐量试验以确定血糖浓度。饲喂对照饮食(CD)的野生菌株,饲喂CD的Gk + /?菌株和饲喂HFD的Gk + /?菌株获得的FBG-GTT2h图在FBG-GTT2h图中分别分布在不同的区域。可以将各个区域分别定义为正常状态,糖尿病前状态和糖尿病状态。根据结果​​,可以为本研究中开发的Gk + /?菌株定义糖尿病前期标准。

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