Talluri Thirumala R, Kumar Dharmendra, Glage Silke, Garrels Wiebke, Ivics Zoltan, Debowski Katharina, Behr Rüdiger, Niemann Heiner, Kues Wilfried A
1 Institut für Nutztiergenetik, Friedrich-Loeffler-Institut , Mariensee, 31535 Neustadt, Germany .
Cell Reprogram. 2015 Apr;17(2):131-40. doi: 10.1089/cell.2014.0080.
Induced pluripotent stem cells (iPSCs) are a seminal breakthrough in stem cell research and are promising tools for advanced regenerative therapies in humans and reproductive biotechnology in farm animals. iPSCs are particularly valuable in species in which authentic embryonic stem cell (ESC) lines are yet not available. Here, we describe a nonviral method for the derivation of bovine iPSCs employing Sleeping Beauty (SB) and piggyBac (PB) transposon systems encoding different combinations of reprogramming factors, each separated by self-cleaving peptide sequences and driven by the chimeric CAGGS promoter. One bovine iPSC line (biPS-1) generated by a PB vector containing six reprogramming genes was analyzed in detail, including morphology, alkaline phosphatase expression, and typical hallmarks of pluripotency, such as expression of pluripotency markers and formation of mature teratomas in immunodeficient mice. Moreover, the biPS-1 line allowed a second round of SB transposon-mediated gene transfer. These results are promising for derivation of germ line-competent bovine iPSCs and will facilitate genetic modification of the bovine genome.
诱导多能干细胞(iPSC)是干细胞研究中的一项重大突破,是用于人类先进再生疗法和家畜生殖生物技术的有前景的工具。iPSC在尚未获得真正胚胎干细胞(ESC)系的物种中特别有价值。在此,我们描述了一种非病毒方法,用于利用编码不同重编程因子组合的睡美人(SB)和猪尾巴(PB)转座子系统来获得牛iPSC,每个重编程因子由自我切割肽序列隔开,并由嵌合的CAGGS启动子驱动。对由包含六个重编程基因的PB载体产生的一个牛iPSC系(biPS-1)进行了详细分析,包括形态学、碱性磷酸酶表达以及多能性的典型特征,如多能性标志物的表达和在免疫缺陷小鼠中形成成熟畸胎瘤。此外,biPS-1系允许第二轮SB转座子介导的基因转移。这些结果对于获得具有生殖系能力的牛iPSC很有前景,并将促进牛基因组的基因修饰。