KJ Muldoon, a 10-month-old baby who sparked nationwide headlines after receiving a first-of-its kind gene-editing treatment, was released from the hospital this week. KJ has spent the majority of ...

Editor’s note: On June 3, 2025, KJ Muldoon was discharged from the hospital and is now at home with his family. When a baby born in Philadelphia was announced as the first person to get a gene ...

The main finding was the identification of two genes, RNF144B and ENPP1, that cause CPPD disease in Americans. Importantly, the same genes were detected in both people of European ancestry and ...

After ruling out a few possibilities, they stumbled across the unfortunate answer—a rare genetic disorder called severe carbamoyl phosphate synthetase 1 (CPS1) deficiency that affects only one ...

KJ Muldoon became the first patient to undergo personalized CRISPR treatment, a therapy that found the one uniquely mutated gene out of 20,000 in his little body, and fixed it.

For the first time, doctors have created a customized treatment using the revolutionary gene-editing technique known as CRISPR to treat a baby with a rare, life-threatening genetic disorder.

Just six months after a newborn at Children's Hospital of Philadelphia was diagnosed with a rare and life-threatening metabolic disorder, doctors were able to develop a personalized treatment ...

A research team has developed and safely delivered a personalized gene editing therapy to treat an infant with a life-threatening, incurable genetic disease. The infant, who was diagnosed with the ...

KJ had become the world’s first patient to be treated with a personalized CRISPR therapy that made a correction directly to the genome. Before hopping on a press briefing with reporters, Nicole ...