‘Foolish choice’: Rogue Chinese scientist He Jiankui’s gene-edited twin babies face risk of premature death
- Research suggests changes made by scientist to protect girls from HIV infection may have significantly increased their risk of dying early
- Specialists say findings underline need for extreme caution when considering possible human applications of gene-editing technologies
A rogue Chinese scientist who caused outrage last year when he said he had created the world’s first “gene-edited” babies in an attempt to protect them from HIV may also have put them at risk with a “foolish” choice of gene, experts said on Monday.
He Jiankui, then an associate professor at the Southern University of Science and Technology in Shenzhen, China, sparked an international scientific and ethical debate when he said he had used a technology known as CRISPR-Cas9 to alter the embryonic genes of twin girls born in November 2018.
He said he had targeted a gene known as CCR5 and edited it in a way he believed would protect the girls from infection with HIV, the virus that causes Aids.
But in a study published in the journal Nature Medicine on Monday, scientists found that people who have two copies of a so-called “Delta 32” mutation of CCR5 – which protects against HIV infection in some people – also have a significantly higher risk of premature death.
The researchers, Xinzhu Wei and Rasmus Nielsen of the University of California, Berkeley, said their findings showed the unintended consequences of introducing mutations in humans.
Robin Lovell-Badge, a leading geneticist and the organiser of a conference where He Jiankui made his revelation, said the results showed the Chinese scientist “was foolish to choose CCR5 to mutate in his attempts at germ line genome editing”.
