中文摘要：

背景人的胚胎的干细胞能在 vitro 无止境地宣传并且能区分进所有三胚胎的细菌层的衍生物。主要在他们的潜力包围人的胚胎的干细胞谎言生产的兴奋专业化能被用于的房间移植治疗。然而，进一步的调查与改变基因背景要求另外的房间线。因此，导出并且建立更多的人的胚胎的干细胞线的努力是高度，从施主的 warranted.Methods 剩余胚胎(胚囊) 被用来由 immunosurgery 孤立内部房间团。所有房间在照耀的鼠科的胚胎的成纤维细胞上连续地是有教养的喂层和多半人的胚胎的干细胞殖民地被房间表面标记染色， karyotyping 和 teratoma formation.Results 随后描绘二根人的胚胎的干细胞线(SYSU-1 和 SYSU-2 ) 从剩余胚胎被建立。二根线表示包括碱的磷酸酶， SSEA- 4， Tra-1-60， Oct-4， Nanog 和 Rex-1.They 的标记在延长段落以后与正常 karyotype 处于无差别的状态仍然是的几 pluripotency 并且能在 vivo.Conclusion 在 vitro 和 teratoma 形成胚胎植物或动物身体二根新人的胚胎的干细胞线从剩余胚胎被建立了。他们能被用来理解 selfrenewal 和区分的机制并且为再生药提供更多的选择。

英文摘要：

Background Human embryonic stem cells can propagate indefinitely in vitro and are able to differentiate into derivatives of all three embryonic germ layers. The excitement surrounding human embryonic stem cells lies largely in their potential to produce specialized cells that can be used for transplant therapies. However, further investigation requires additional cell lines with varying genetic background. Therefore, efforts to derive and establish more human embryonic stern cell lines are highly warranted. Methods Surplus embryos （blastocysts） from donors were used to isolate the inner cell mass by immunosurgery. All cells were cultured continuously on irradiated murine embryonic fibroblasts feed layer and likely human embryonic stem cell colonies were subsequently characterized by cell surface marker staining, karyotyping and teratoma formation. Results Two human embryonic stern cell lines （SYSU-1 and SYSU-2） were established from surplus embryos. The two lines express several pluripotency markers including alkaline phosphatase, SSEA- 4, Tra-1-60, Oct-4, Nanog and Rex-1. They remain in undifferentiated state with normal karyotype after prolonged passages and can form embryoid bodies in vitro and teratoma in vivo. Conclusion Two new human embryonic stem cell lines have been established from surplus embryos. They can be used to understand selfrenewal and differentiating mechanisms and provide more choices for regenerative medicine.