R. Alan Leo in the Harvard Gazette:
The power to edit genes is as revolutionary, immediately useful, and unlimited in its potential as was Johannes Gutenberg’s printing press. And like Gutenberg’s invention, most DNA editing tools are slow, expensive, and hard to use — a brilliant technology in its infancy. Now, Harvard researchers developing genome-scale editing tools as fast and easy as word processing have rewritten the genome of living cells using the genetic equivalent of search and replace — and combined those rewrites in novel cell strains, strikingly different from their forebears.
“The payoff doesn’t really come from making a copy of something that already exists,” said George Church, a professor of genetics at Harvard Medical School who led the research effort in collaboration with Joe Jacobson, an associate professor at the Media Lab at the Massachusetts Institute of Technology. “You have to change it — functionally and radically.”
Such change, Church said, serves three goals. The first is to add functionality to a cell by encoding for useful new amino acids. The second is to introduce safeguards that prevent cross-contamination between modified organisms and the wild. A third, related aim, is to establish multiviral resistance by rewriting code hijacked by viruses.