Altos Labs has raised at least $270m (£231m) to look into whether biological reprogramming technology could revitalise animal bodies, ultimately prolonging human life.
Although some of the mice in his experiments showed signs their tissues had become younger, others developed ugly embryonic tumours called teratomas, which can be cancerous.Another expert joining the firm is Steve Horvath, a UCLA professor and developer of a"biological clock" that can accurately measure human aging and the effectiveness of any age-reversal drug developed.
Other startups have been looking at reprogramming technology, including UK-based Shift Bioscience, but their efforts have not yet led to any treatments tested on people in clinical trials. David Sinclair, a researcher at Harvard University who last year reported restoring sight to mice using the technology, said the field is uniquely promising.
Alejandro Ocampo, who used to work in Mr Izpisua Belmonte's lab, said the technology can be used to"take a cell from an 80-year old and, in vitro, reverse the age by 40 years", but cautioned that it is"risky" and"a long way from human therapy".
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