Cell reprogramming leaves a “footprint“ behind

February 02, 2011 LA JOLLA, CA—Reprogramming adult cells to recapture their youthful “can-do-it-all“ attitude appears to leave an indelible mark, found researchers at the Salk Institute for Biological Studies. When the team, led by Joseph Ecker, PhD., a professor in the Genomic Analysis Laboratory, scoured the epigenomes of so-called induced pluripotent stem cells base by base, they found a consistent pattern of reprogramming errors. What’s more, these incompletely or inadequately reprogrammed hotspot