这是个一直争论的命题。这两天有个报道， 看看这儿。http://www.nature.com/nature/journal/v5

Nature Volume:505, Pages: 641–647 Date published:(30 January 2014)

DOI:doi:10.1038/nature12968

Stimulus-triggered fate conversion of somatic cells into pluripotency

Here we report a unique cellular reprogramming phenomenon, called stimulus-triggered acquisition of pluripotency (STAP), which requires neither nuclear transfer nor the introduction of transcription factors. In STAP, strong external stimuli such as a transient low-pH stressor reprogrammed mammalian somatic cells, resulting in the generation of pluripotent cells.