It is reported this week that a Russian scientist plans to edit the genes of more human embryos intending to bring gene-edited babies to birth. As with the case in China last year, the intent is to edit a gene called CCR5 that is responsible for a receptor that facilitates initiation of HIV infection. The stated reason is to prevent transmission of infection from the mother, not the father, as in the Chinese case. Maternal transmission of HIV is a real risk, but there are other ways to prevent it, with medications. And, as recently reported on this blog, the risks of editing this gene are not understood, nor are the long-term risks of heritable genome editing.
The science press is saying that someone should put a stop, now, to bringing edited embryos to pregnancy and birth. But it is unlikely that effective action can be taken. The public will has not been engaged, necessary medical research controls are not in place, and no one can say just who would have the authority to take what sort of action.
So for the moment there is little else to say. We will hear of more cases. We will find out later how we will respond. Clarity and consistency of that response seem unlikely. https:/