他们发现这些胎儿干细胞在细胞环境中同样可以自发分化为心脏细胞。
They found that the cells spontaneously differentiated into cardiac cells in cell culture as well.
目的：提供一个对目前状况和胎儿干细胞基因治疗中的作用委员会的意见。
Objective: To provide a Committee opinion on the present status and role of stem cells in fetal genetic therapy.
一份新报告指出，长期保存的人类胎儿干细胞，其基因物质会逐渐产生变化。
A new report says human embryonic stem cells kept for long periods of time develop changes in their genetic material.
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