At the ESGCT annual meeting in Rome, inclement weather disrupted travel. Jeremy Duffield, CSO of Prime Medicine, criticized Tessera Therapeutics' gene editing technology, emphasizing Prime's established prime editing. Michael Holmes, Tessera's CSO, presented in vivo RNA Gene Writer data for sickle cell disease and α-1 antitrypsin deficiency, aiming for one-shot therapies. Duffield later showcased Prime's preclinical data on liver diseases, highlighting LNP delivery and editing efficiency.