Gene editing, or genome editing, is a group of technologies that give scientists the ability to change an organism's DNA. These technologies allow genetic material to be added, removed, or altered at particular locations in the genome. Several approaches to genome editing have been developed. A recent one is known as CRISPR-Cas9, which is short for clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9.
The concept of gene editing has been developing for several decades, with early techniques like homologous recombination being used to target specific genes. However, the field was revolutionized with the discovery of CRISPR-Cas9 in the 2010s. The system was originally discovered in bacteria as a defense mechanism against viruses. Jennifer Doudna and Emmanuelle Charpentier were awarded the Nobel Prize in Chemistry in 2020 for their development of the CRISPR-Cas9 genetic scissors.
The CRISPR-Cas9 system has been widely adopted in laboratories worldwide for its efficiency, low cost, and ease of use. It is being used for a wide range of applications, from basic research to developing new treatments for genetic diseases. In agriculture, it is used to create crops that are more resistant to pests and drought. The technology is also being explored for its potential to edit human embryos to prevent inherited diseases, which raises ethical concerns.