Transcriptional and phenotypic comparisons of Ppara knockout and siRNA knockdown mice.

Transcriptional and phenotypic comparisons of Ppara knockout and siRNA knockdown mice.
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DOI:
10.1093/nar/gkl609
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发表时间:
2006
影响因子:
14.9
通讯作者:
Ulrich RG
Ulrich RG
中科院分区:
生物学2区
文献类型:
--
作者:
De Souza AT;Dai X;Spencer AG;Reppen T;Menzie A;Roesch PL;He Y;Caguyong MJ;Bloomer S;Herweijer H;Wolff JA;Hagstrom JE;Lewis DL;Linsley PS;Ulrich RG

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RNA干扰(RNA interference,RNAi)是研究哺乳动物基因功能的重要手段。然而,对RNAi的体内应答的特异性和幅度仍有待充分表征。基因敲除小鼠和相应敲除版本的分子和表型比较将有助于阐明RNAi方法的实用性。在这里,我们使用流体动力学传递的小干扰RNA(siRNA)敲低过氧化物酶体增殖物激活受体α(Ppara),一个基因是中央的脂肪酸代谢的调节。我们发现,Ppara在肝脏中的敲低导致与Ppara−/−小鼠相当的转录谱和代谢表型。结合用PPARα激动剂非诺贝特处理的小鼠的特征,我们证实了RNAi反应的特异性,并鉴定了与PPARα调节接近的候选基因。Ppara基因敲减的动物出现了低血糖和高血糖,这是在Ppara−/−小鼠中观察到的表型。与Ppara−/−小鼠相反,不需要禁食来发现这些表型。总之,这些数据验证了RNAi方法的实用性,并表明siRNA可用作基因功能研究中经典敲除技术的补充。
RNA interference (RNAi) has great potential as a tool for studying gene function in mammals. However, the specificity and magnitude of the in vivo response to RNAi remains to be fully characterized. A molecular and phenotypic comparison of a genetic knockout mouse and the corresponding knockdown version would help clarify the utility of the RNAi approach. Here, we used hydrodynamic delivery of small interfering RNA (siRNA) to knockdown peroxisome proliferator activated receptor alpha (Ppara), a gene that is central to the regulation of fatty acid metabolism. We found that Ppara knockdown in the liver results in a transcript profile and metabolic phenotype that is comparable to those of Ppara−/− mice. Combining the profiles from mice treated with the PPARα agonist fenofibrate, we confirmed the specificity of the RNAi response and identified candidate genes proximal to PPARα regulation. Ppara knockdown animals developed hypoglycemia and hypertriglyceridemia, phenotypes observed in Ppara−/− mice. In contrast to Ppara−/− mice, fasting was not required to uncover these phenotypes. Together, these data validate the utility of the RNAi approach and suggest that siRNA can be used as a complement to classical knockout technology in gene function studies.
DOI: 10.1042/bj20031565
发表时间: 2004-03-15
影响因子: 4.1
作者:
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发表时间: 2004-06-25
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影响因子: 4.1
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DOI: 10.1002/j.1460-2075.1996.tb00918.x
发表时间: 1996-10-01
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
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通讯作者: Auwerx, J