But the skin cells were regressed using a method which caused tumors and the potential for genetic mutation, which meant those induced pluripotent stem cells, or iPS, were not safe for clinical use.

• 但采用一种方法可使皮肤细胞退化，而该方法可导致肿瘤和潜在的基因变异，这意味着这种诱导的多能干细胞或ips使用于临床是不安全的。