This raised the question of whether transcription factors could directly induce other defined somatic cell fates, and not only an undifferentiated state.
这就引出问题，转录因子是否能直接诱导其它明确的体细胞，而不仅是未分化状态的细胞。
When cultured on feeder cells in the presence of many kinds of cytokines, primordial germ cells can proliferate continually and maintain undifferentiated state.
在饲养细胞层和多种生长因子的共同作用下，可保持原生殖细胞在体外不断增殖而不分化，最终建立EG细胞系。
Conclusion HPESCRG1 was found to be a novel gene expressed specifically in human es cell, which might be related to self renewal of human es cell and maintaining its undifferentiated state.
结论HPESCRG1基因是一个人类ES细胞中表达特异性新基因，很可能与人类ES细胞的自我更新和维持其未分化状态密切相关。
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