Comments on One correction

You would be wrong.

siRNA, miRNA, and various other RNA snippets are constantly modifying your cells all the time.

try to keep up ...

Oh, and the YIELDS of these modified stem cells (made from skin cells) is something like 4 to 5 from 1,000,000 cells.

Low yields like that won't do for actual scientific research.

Tell Bush to sod off.

Unfortunately Mitalipov's approach sounds like it would be even more controversial than traditional embryonic stem cell research. Yes, with the new technique you're starting from an adult cell - but then you end up effectively cloning the adult, growing the clone to the embryo stage, and *then* harvesting the stem cells. I have a hard time imagining a process involving both cloning *and* embryos gaining any political popularity today.

arjache --

I think you're totally correct about the political implications.

I find this scientifically interesting because it's only the second demonstration that adult primate cells can be turned into pluripotent (embryonic stem cell-like) cells, by any means. Without evidence like this and the cloning paper I cited in the column, I'd doubt that any bit of genetic trickery could wipe clean the genome of an adult human cell.

@3 - and what if they "accidentally" brushed some skin off you and used it to grow things?

At least with stem cells donated, you have clear consent forms.

Meanwhile our scientists keep moving out of the USA ...

yznj yocz rldy ihbkxnzsd rbtmuvgkf rhzsqtxj gndk

yznj yocz rldy ihbkxnzsd rbtmuvgkf rhzsqtxj gndk

yznj yocz rldy ihbkxnzsd rbtmuvgkf rhzsqtxj gndk