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Cell Res:“定制”转基因猪成为可能

2014-02-17 佚名 光明网

我国科学家成功培育出世界首例 ROSA26 定点基因打靶猪模型,这让科学家培养“定制”基因猪成为可能。研究成果日前在线发表于著名学术期刊《细胞研究》(Cell Research)上。这项研究是由吉林大学动物医院学院教授、中科院广州生物医药与健康研究院研究员赖良学博士与美国密西根大学王忠教授合作开展的。 赖良学解释说,从基因角度上看,猪与人类基因的相似性达到83%,因此猪在

我国科学家成功培育出世界首例 ROSA26 定点基因打靶猪模型,这让科学家培养“定制”基因猪成为可能。研究成果日前在线发表于著名学术期刊《细胞研究》(Cell Research)上。这项研究是由吉林大学动物医院学院教授、中科院广州生物医药与健康研究院研究员赖良学博士与美国密西根大学王忠教授合作开展的。



赖良学解释说,从基因角度上看,猪与人类基因的相似性达到83%,因此猪在医学研究上有很大前景。“比如,因为猪与人类生理比较接近,我们可以让猪得人类的疾病,进而探讨治疗方法,这比将小鼠作为模型动物要可靠得多。而猪的肝脏、胰脏等器官与人类的相似性也很高,科学家们一直在寻找将猪作为人源化器官培养体的方式。”赖良学说,“但这一切都需要通过转基因的方法实现。简单地说,就是破坏猪原有的一些性状,转进我们需要的性状。”

但是,由于缺乏猪胚胎干细胞,转基因猪的制备主要依赖于体细胞基因修饰和体细胞核移植技术。这种技术缺乏可控性,科学家们往往无法得到需要性状的猪,这成了目前研究中最大的瓶颈。

赖良学领导的研究团队在猪的基因组中找到了一个特殊基因位点: ROSA26 ,处在这个位点后的基因会广泛表达于所有组织和细胞中。“简单地说,这能让我们转入的基因表达出来,得到拥有定制性状的猪。”

这些“定制的猪”还可以用于在猪体内世系追踪各类干细胞的分化和再生,为揭示和人类干细胞相关的疾病机理和实施干细胞治疗提供宝贵的大动物实验依据。

原始出处:

Xiaoping Li, Yi Yang, Lei Bu, Xiaogang Guo, Chengcheng Tang, Jun Song, Nana Fan, Bentian Zhao, Zhen Ouyang, Zhaoming Liu, Yu Zhao, Xiaoling Yi, Longquan Quan, Songcai Liu, Zhenguo Yang, Hongsheng Ouyang, Y Eugene Chen, Zhong Wang & Liangxue Lai. Rosa26-targeted swine models for stable gene over-expression and Cre-mediated lineage tracing. Cell Research, 7 February 2014; doi:10.1038/cr.2014.15

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    2014-03-18 维他命
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    2014-02-19 muzishouyi

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