Chinese scientist He Jiankui’s November 2018 announcement of the world’s first gene-edited babies shocked the scientific community and triggered global ethics debates.
The Announcement
At the Second International Summit on Human Genome Editing in Hong Kong, He revealed he’d used CRISPR to edit embryos, resulting in twin girls born with modified CCR5 genes supposedly resistant to HIV. The scientific community reacted with horror - no peer review, questionable consent, unnecessary medical intervention.
The Backlash
Over 120 Chinese scientists condemned the experiment. The university denied knowledge. Jennifer Doudna (CRISPR co-inventor) called it “irresponsible.” The babies faced unknown health risks - CRISPR can cause off-target mutations. Editing germ cells means changes pass to future generations.
The Trial
China arrested He in January 2019 and sentenced him to three years in prison for “illegal medical practice” in December 2019. He was fined 3 million yuan ($430,000) and banned from reproductive medicine. Two other scientists received lesser sentences. He was released in April 2022.
Scientific Concerns
The CCR5 edit may increase susceptibility to West Nile virus and flu. Safer HIV prevention methods exist (PrEP, antiretroviral therapy). Some embryos showed mosaicism - only some cells edited. The experiment answered no scientific questions and exploited vulnerable couples desperate for IVF.
Global Response
Countries tightened regulations on human embryo editing. A WHO expert committee in 2019 called for a global registry of gene-editing research. Most nations ban germ-line editing (changes that pass to children), but enforcement varies. The technology’s power demands international governance.
Source: Nature CRISPR Babies