A daring effort is under way to create the first children whose DNA has been tailored using gene editing.
When Chinese researchers first edited the genes of a human embryo in a lab dish in 2015, it sparked global outcry and pleas from scientists not to make a baby using the technology, at least for the present.
It was the invention of a powerful gene-editing tool, CRISPR, which is cheap and easy to deploy, that made the birth of humans genetically modified in an in vitro fertilization (IVF) center a theoretical possibility.
Now, it appears it may already be happening.
According to Chinese medical documents posted online this month, a team at the Southern University of Science and Technology, in Shenzhen, has been recruiting couples in an effort to create the first gene-edited babies. They planned to eliminate a gene called CCR5 in hopes of rendering the offspring resistant to HIV, smallpox, and cholera.
He Jiankui leads a team using the gene-editing technology CRISPR in an effort to prevent disease in newborns.
The clinical trial documents describe a study in which CRISPR is employed to modify human embryos before they are transferred into women’s uteruses.
The scientist behind the effort, He Jiankui, did not reply to a list of questions about whether the undertaking had produced a live birth. Reached by telephone, he declined to comment.
However, data submitted as part of the trial listing shows that genetic tests have been carried out on fetuses as late as 24 weeks, or six months. It’s not known if those pregnancies were terminated, carried to term, or are ongoing.
[After this story was published, the Associated Press reported that according to He, one couple in the trial gave birth to twin girls this month, though the agency wasn't able to confirm his claim independently. He also released a promotional video about his project.]
The birth of the first genetically tailored humans would be a stunning medical achievement, for both He and China. But it will prove controversial, too. Where some see a new form of medicine that eliminates genetic disease, others see a slippery slope to enhancements, designer babies, and a new form of eugenics.
Dr. Sullivan serves as professor of pharmacy practice and director of the Center for Bioethics. His research and writing interests include biomedical ethics, moral philosophy, and reproductive ethics. Contact him today for your story! Simply click on his icon to arrange an interview.
