Scientists unveil the ‘most clever CRISPR gadget’ so far
By Sharon Begley,
STAT
| 04. 20. 2016
Untitled Document
For all the hoopla about CRISPR, the revolutionary genome-editing technology has a dirty little secret: it’s a very messy business. Scientists basically whack the famed double helix with a molecular machete, often triggering the cell’s DNA repair machinery to make all sorts of unwanted changes to the genome beyond what they intended.
On Wednesday, researchers unveiled in Nature a significant improvement — a new CRISPR system that can switch single letters of the genome cleanly and efficiently, in a way that they say could reliably repair many disease-causing mutations.
Because of “the cell’s desperate attempts” to mend its genome, said Harvard University biologist George Church, “what often passes as ‘genome editing’ would more appropriately be called ‘genome vandalism,’” as the cell inserts and deletes random bits of DNA where CRISPR cuts it.
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