重编程方法和多能性状态在患者特异性人多能干细胞向配子分化中的作用。

The role of the reprogramming method and pluripotency state in gamete differentiation from patient-specific human pluripotent stem cells.

机构信息

Ghent-Fertility and Stem Cell Team, Department for Reproductive Medicine, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium.

Research Group, Reproduction and Genetics, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Brussels, Belgium.

出版信息

Mol Hum Reprod. 2018 Apr 1;24(4):173-184. doi: 10.1093/molehr/gay007.

Abstract

The derivation of gametes from patient-specific pluripotent stem cells may provide new perspectives for genetic parenthood for patients currently facing sterility. We use current data to assess the gamete differentiation potential of patient-specific pluripotent stem cells and to determine which reprogramming strategy holds the greatest promise for future clinical applications. First, we compare the two best established somatic cell reprogramming strategies: the production of induced pluripotent stem cells (iPSC) and somatic cell nuclear transfer followed by embryonic stem cell derivation (SCNT-ESC). Recent reports have indicated that these stem cells, though displaying a similar pluripotency potential, show important differences at the epigenomic level, which may have repercussions on their applicability. By comparing data on the genetic and epigenetic stability of these cell types during derivation and in-vitro culture, we assess the reprogramming efficiency of both technologies and possible effects on the subsequent differentiation potential of these cells. Moreover, we discuss possible implications of mitochondrial heteroplasmy. We also address the ethical aspects of both cell types, as well as the safety considerations associated with clinical applications using these cells, e.g. the known genomic instability of human PSCs during long-term culture. Secondly, we discuss the role of the stem cell pluripotency state in germ cell differentiation. In mice, success in germ cell development from pluripotent stem cells could only be achieved when starting from a naive state of pluripotency. It remains to be investigated if the naive state is also crucial for germ cell differentiation in human cells and to what extent human naive pluripotency resembles the naive state in mouse.

摘要

患者特异性多能干细胞来源的配子可能为目前面临不育的患者提供遗传父母的新视角。我们利用现有数据评估患者特异性多能干细胞的配子分化潜能,并确定哪种重编程策略对未来的临床应用最有希望。首先,我们比较了两种最成熟的体细胞重编程策略:诱导多能干细胞(iPSC)的产生和体细胞细胞核转移后胚胎干细胞的衍生(SCNT-ESC)。最近的报告表明,尽管这些干细胞显示出相似的多能性潜力,但在表观基因组水平上存在重要差异,这可能对它们的适用性产生影响。通过比较这些细胞类型在衍生和体外培养过程中遗传和表观遗传稳定性的数据,我们评估了这两种技术的重编程效率以及对这些细胞随后分化潜能的可能影响。此外,我们还讨论了线粒体异质性的可能影响。我们还讨论了这两种细胞类型的伦理方面,以及使用这些细胞进行临床应用的安全考虑因素,例如在长期培养过程中人类 PSCs 的已知基因组不稳定性。其次,我们讨论了干细胞多能性状态在生殖细胞分化中的作用。在小鼠中,只有从原始多能性状态开始,才能从多能干细胞中成功获得生殖细胞发育。目前仍需研究原始状态是否对人类细胞生殖细胞分化也至关重要,以及人类原始多能性在多大程度上类似于小鼠中的原始状态。

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