9 Surprising Facts About Gene Editing With CRISPR Today

7. CRISPR-Edited Organs Are Becoming Reality for Transplantation

The development of CRISPR-edited organs for human transplantation represents one of the most ambitious and surprising applications of gene editing technology, potentially solving the critical shortage of donor organs that affects hundreds of thousands of patients worldwide. Researchers have made remarkable progress in editing pig organs to make them compatible with human physiology, addressing the major barriers to xenotransplantation that have persisted for decades. The most significant breakthrough involves the systematic removal of porcine endogenous retroviruses (PERVs) from pig genomes, eliminating the risk of cross-species viral transmission that has long been a concern with animal-to-human organ transplants. Scientists have successfully created pigs with up to 69 genetic modifications, including the removal of genes that cause organ rejection and the addition of human genes that improve compatibility. Recent clinical trials have demonstrated the successful transplantation of CRISPR-edited pig kidneys and hearts into human patients, with some organs functioning normally for extended periods. The technology has also enabled the development of organs with enhanced properties, such as kidneys that are more resistant to ischemia-reperfusion injury and hearts with improved resistance to cardiac arrest. Beyond xenotransplantation, CRISPR is being used to edit human organs ex vivo before transplantation, potentially improving outcomes and reducing rejection rates. The precision of modern gene editing has also enabled the creation of personalized organs that are specifically modified to match individual patient genetics, representing a new frontier in personalized medicine.