Generation of Fully Pluripotent Female Murine-Induced Pluripotent Stem Cells1

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Abstract

The high quality of induced pluripotent stem cells (iPSCs) has been determined to be high-grade chimeras that are competent for germline transmission, and viable mice can be generated through tetraploid complementation. Most of the high-quality iPSCs described to date have been male. Female iPSCs, especially fully pluripotent female iPSCs, are also essential for clinical applications and scientific research. Here, we show, for the first time, that a gender-mixed induction strategy could lead to a skewed sex ratio of iPSCs. After reprogramming, 50%, 70%, and 90% female initiating mouse embryonic fibroblasts at different male ratios resulted in 14.1 ± 6.8% (P < 0.05), 31.8 ± 5.4% (P < 0.05), and 80.1 ± 2.8% (P < 0.05) female iPSCs, respectively. Furthermore, these female iPSCs had pluripotent properties typical of embryonic stem cells. Importantly, these fully pluripotent female iPSCs could generate viable mice by tetraploid complementation. These findings indicate that high-quality female iPSCs could be derived effectively, and suggest that clinical application of female iPSCs is feasible.

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