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作 者:王文仪[1] 刘海超[1] 李渊[1] 李维[1] 丁镇伟[1] 张自强[1] 李奥[1] 吴冠青[1]
机构地区:[1]北京协和医学院中国医学科学院肿瘤医院临床肿瘤实验中心,100021
出 处:《国际遗传学杂志》2014年第2期47-53,98,共8页International Journal of Genetics
基 金:科技部973子课题(2012CB517700);国家自然科学基金资助项目(81072688、81173114);科技部院校发展基金(2011EGl50311)
摘 要:目的构建与人类常染色体显性遗传性多囊肾病(ADPKD)疾病表型相似的小鼠模型。方法在已往建立的条件性Pkd2基因敲除小鼠基础上,通过对多种Cre启动子转基因小鼠进行筛选,寻求和建立有效模拟人类ADPKD疾病表型的小鼠模型。结果通过对多种Cre启动子转基因小鼠的筛选,发现Villin(绒毛蛋白)启动子所驱动的Cre启动子转基因小鼠与已往建立的条件性Pkd2基因敲除小鼠(Pkd砂伊)所交配产生的复合基因型小鼠(Vil-Cre:Pkd2β/β伊)可以产生与人类ADPKD相近的疾病表型。Vil-Cre:Pkd2β/β小鼠在1/2个月时肾重/体重比开始增加,随着年龄的增大,其肾脏囊肿程度都呈现加重趋势,Vil-Cre:Pkd2β/β小鼠和未携带Vil-Cre的Pkd2β/β小鼠在1/2个月、1、2个月肾重与体重比值差异显著(P=0.0386;P=0.0015;P=0.0001)。生存曲线分析发现例.Cre:Pkd2β/β小鼠在4个月左右开始死于肾囊肿导致的肾衰竭,生存时间不超过7个月。血液尿素氮检测发现随年龄增加,Vil-Cre:Pkd2β/β小鼠在1、2、3、4个月相邻月份之间尿素氮含量显著上升(P=0.0035;P=0.0072;P=0.0079),肾功能呈明显下降趋势。结论通过筛选多种Cre启动子转基因小鼠.最终发现Vil-Cre:Pkd2β/β小鼠可以产生与人类ADPKD相似的疾病表型,并在其4个月左右死于多囊肾所导致的肾功能衰竭。该动物模型的建立将为深入研究人类ADPKD发病机制和评估ADPKD治疗效果提供了一个理想的动物模型。Objective We have applied a conditional knockout mice for Pkd2 to establish a mouse model mimicking clinical phenotypes of human ADPKD. Methods Using Pkd2 conditional knock- out mice we generated previously, a mouse model ( Vil-Cre:Pkd2β/β mice ) which is closely similar to human ADPKD patient was distinguished by screening a panel of Cre transgenic mice. Results Vi/-Cre : Pkd2β/β mice exhibit cystic phenotypes in the kidney , liver and pancreas. The kidney/body ratio ofVil-Cre:Pkd2β/β mice increases from 1/2 month, and there is obvious increasing trend with their ages. Kidney/body weight among different ages (1/2, 1, and 2 months) in Vil-Cre: Pkd2β/βand Pkd2β/β mice are significantly different ( P = O. 038 6 ; P = 0. 001 5 ; P = 0. 000 1 ) . Kaplan-Meier analysis il- lustrates that Vil-Cre:Pkd2β/β mice most likely dies of renal failure due to loss of renal parenchyma a- round the age of 4- month- old and do not survived beyond 7 months. Blood Urea Nitrogen ( BUN ) analysis reflects that kidney function of Vil-Cre:Pkd2β/β mice deteriorates rapidly with the increased age, BUN contents among contiguous ages (1, 2, 3 and 4 months) increase markedly (P = 0. 003 5; P = 0. 007 2 ; P = 0. 007 9 ). Conclusion Given Vil-Cre : Pkd2β/β mice display very similar disease phe- notypes of human ADPKD, this mouse model can serve as an ideal ADPKD mouse model for study of AD- PKD pathogenesis and the evaluation of ADPKD therapeutic responses.
关 键 词:常染色体显性遗传性多囊肾疾病 ADPKD Pkd2 Vil-Cre
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