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Establishment of a rapid and footprint-free protocol for differentiation of human embryonic stem cells into pancreatic endocrine cells with synthetic mRNAs encoding transcription factors

机译:建立快速无占用空间的协议用于利用编码转录因子的合成mRNA将人胚胎干细胞分化为胰腺内分泌细胞

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摘要

BackgroundTransplantation of pancreatic β cells generated in vitro from pluripotent stem cells (hPSCs) such as embryonic stem cells (ESCs) or induced pluripotent stem cells (iPSCs) has been proposed as an alternative therapy for diabetes. Though many differentiation protocols have been developed for this purpose, lentivirus-mediated forced expression of transcription factors (TF)—PDX1 and NKX6.1—has been at the forefront for its relatively fast and straightforward approach. However, considering that such cells will be used for therapeutic purposes in the future, it is desirable to develop a procedure that does not leave any footprint on the genome, as any changes of DNAs could potentially be a source of unintended, concerning effects such as tumorigenicity. In this study, we attempted to establish a novel protocol for rapid and footprint-free hESC differentiation into a pancreatic endocrine lineage by using synthetic mRNAs (synRNAs) encoding PDX1 and NKX6.1. We also tested whether siPOU5F1, which reduces the expression of pluripotency gene POU5F1 (also known as OCT4), can enhance differentiation as reported previously for mesoderm and endoderm lineages.
机译:背景技术已经提出了从多能干细胞(hPSC)例如胚胎干细胞(ESC)或诱导性多能干细胞(iPSC)体外产生的胰腺β细胞的移植作为糖尿病的替代疗法。尽管已经为此目的开发了许多分化方案,但慢病毒介导的转录因子(TF)PDX1和NKX6.1的强制表达由于其相对快速和直接的方法而处于最前沿。但是,考虑到此类细胞将来会用于治疗目的,希望开发一种不会在基因组上留下任何足迹的方法,因为有关DNA的任何变化,DNA的任何变化都可能是意料之外的来源。致瘤性。在这项研究中,我们尝试通过使用编码PDX1和NKX6.1的合成mRNA(synRNA),建立一种快速且无足迹的hESC分化为胰腺内分泌谱系的新方案。我们还测试了降低多能性基因POU5F1(也称为OCT4)表达的siPOU5F1是否可以增强分化,如先前针对中胚层和内胚层谱系的报道。

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