Where are all the new CRISPR human embryo papers?

Last year I heard from several sources that there somewhere between 3-5 unpublished manuscripts reporting the use of CRISPR gene targeting in human embryos being shopped around at various journals in addition to the one that had been published. Since that time we’ve seen a grand total of one additional paper reporting on CRISPR of human embryos.

So what gives?

Were the sources wrong?

I don’t think so and I believe there are additional labs pursuing research on the use of CRISPR in human embryos.

Depending on the context, the oversight, and the training of those involved, there may be nothing wrong with these studies at all. In fact, they could be positive and teach us a lot if the teams are careful. However, CRISPR’ing human embryos without a good rationale and appropriate oversight is unwise. I also cannot imagine supporting use of CRISPR with the intent to make a modified new human being for many years to come if ever. You can learn more about the history of genetic modification and my views as well as those of CRISPR leaders in my new book, GMO Sapiens.

So where are all the CRISPR human embryo papers? I can think of a few main reasons why we haven’t seen more so far.

embryo human

Wikimedia Photo

Editors as gatekeepers? One possible reason we haven’t seen more CRISPR’d human embryo papers is that journal editors are reluctant to publish them and are acting as essentially gatekeepers for this kind of work. If true, what are the potential risks or benefits of such a de facto filtering system and what is the basis by which the editors are making such decisions?

Outcomes of first 2 pubs discouraged more? Another possibility is that other research teams have been discouraged by the first two papers reporting CRISPR use in human embryos. I can see at least two levels at which those considering working and publishing in this area might be reluctant to proceed because of the first two papers. On the one hand, both papers reported technical challenges with this research, which was discouraging. On the other hand, both papers were heavily criticized by some.

NAS Meeting deterrent? In between the two papers, the National Academy of Sciences held its big DC meeting that concluded with a somewhat moderate warning that it would be unwise for people to use CRISPR in the human germline, but that research limited to the lab is OK. Could that have discouraged people from doing CRISPR in human embryos and publishing it? I kind of doubt it.

Tough reviewers? Finally, it is possible that more papers reporting the use of CRISPR in human embryos are coming soon, but reviewers rightly have high expectations for these papers to use the latest CRISPR technology and be very rigorous.

It could also be some combination of these things together or some other factor. One way or another, more of these papers are coming sooner or later. I hope that the research will have been done with proper approvals, oversight, and ethics training plus that these papers teach us new, important things both about human development and about CRISPR itself. See my ABCD plan for responsible use of CRISPR in a human embryo  context.

4 thoughts on “Where are all the new CRISPR human embryo papers?


  1. The extremely cynical v.iew would be the authors are trying to get these in Nature, Cell, Science, which don’t want them because the shock value (and by extension ad revenue) ain’t there anymore. It wouldn’t be the absolute first paper, so who would care?

    The (slightly) less cynical view goes with one of the BSD gatekeepers telling the editors to reject these papers on ethical grounds (while simultaneously working on the idea themselves).

    The scientific view might be the papers are just not interesting. What would the advance be? Off-targets were (shoddily) analyzed. Cleavage was demonstrated. It would probably have to be a developmental mutant paper, which may just recapitulate stuff developmental biology already knew or be a screen for human development.

    Who knows, maybe they’ll just show up in PLoS ONE eventually?


  2. good. All research in anything involving designer babies should be halted. I am glad to see people are being proactive in stopping it before the government steps in and bans it outright.

    There is no point at all in researching the possibility of altering embryos unless you plan to produce designer babies at some point.


  3. Is it possible that the people producing these papers were persuaded to pursue commercial endeavors with their innovations, and persuaded as well to keep them under wraps to avoid assisting potential competitors?

    While the main topics of these papers seem unlikely to point towards a commercial product, is it possible that some of their key innovations could?


    • I’m honestly hard pressed to come up with any “key innovations” that the theoretical authors in question would come up with. I would think for human embryo manipulation a lot of credit for a successful experiment comes down to how good the injectionist is.

      It’s much more likely that the papers will just be replication-type studies at different genomic loci with no real innovations and the papers are being submitted (and rejected) at “high-impact” journals.

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