Inducible transgenic rat model for diabetes mellitus based on shRNA-mediated gene knockdown.

Inducible transgenic rat model for diabetes mellitus based on shRNA-mediated gene knockdown.
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DOI:
10.1371/journal.pone.0005124
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发表时间:
2009
期刊:
影响因子:
3.7
通讯作者:
Bader M
Bader M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kotnik K;Popova E;Todiras M;Mori MA;Alenina N;Seibler J;Bader M

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大鼠是生物医学研究中的重要动物模型,但基因打靶技术尚未建立。因此,我们的目标是利用shRNA技术和原核显微注射技术培育转基因敲除大鼠。为此,我们采用了四环素诱导的靶向胰岛素受体(IR)的shRNA表达系统。多西环素(DOX)对转基因大鼠的治疗导致剂量依赖性和可逆性的血糖升高,这是由于普遍抑制IR的表达和信号而引起的。在DOX处理后,我们既没有检测到干扰素反应,也没有检测到microRNA加工的干扰,排除了shRNA表达的毒性影响。小剂量DOX治疗可导致糖尿病的慢性状态。总之,我们开发了一种技术,可以对大鼠中任何感兴趣的基因进行特异性、诱导性和可逆性抑制。我们用这种方法建立的第一个转基因大鼠系代表了一种可诱导的糖尿病模型。
The rat is an important animal model in biomedical research, but gene targeting technology is not established for this species. Therefore, we aimed to produce transgenic knockdown rats using shRNA technology and pronuclear microinjection. To this purpose, we employed a tetracycline-inducible shRNA expression system targeting the insulin receptor (IR). Doxycycline (DOX) treatment of the resulting transgenic rats led to a dose-dependent and reversible increase in blood glucose caused by ubiquitous inhibition of IR expression and signalling. We could neither detect an interferon response nor disturbances in microRNA processing after DOX treatment excluding toxic effects of shRNA expression. Low dose DOX treatment induced a chronic state of diabetes mellitus. In conclusion, we have developed a technology which allows the specific, inducible, and reversible suppression of any gene of interest in the rat. Our first transgenic rat line generated with this method represents an inducible model for diabetes mellitus.
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