If it seems to you like dramatic cautionary tales about CRISPR accompanied by all sorts of media are coming at us more frequently, it’s not your imagination. In the latest yesterday, it was reported in a new paper led by Allan Bradley that CRISPR-Cas9 results in sometimes large-scale chromosomal lesions at or even away from the […]
Mulling over latest CRISPR tumult, this one from Nat Biot pub on DNA lesions Read More »
Every year in December I go out onto a limb and make stem cell predictions for the coming year as I did in late 2017 for this year. Then usually around the 1/2-way point through the year I check in on how the predictions are faring so far at that point. In this post I give
Midterm grades on my 20 x 2018 stem cell predictions Read More »
The news that CRISPR-Cas9 gene editing in its current form may not work in a substantial fraction of people due to many of us having immunity to Cas9 came as a shock to many, but if you think about it, maybe it’s not so surprising. I don’t see it as the end of the world. A (preprint) from
Keep calm & CRISPR on: perspectives on report of human Cas9 immunity Read More »
Every year I look into my stem cell crystal ball and make predictions for our field including regenerative medicine. Well, I don’t really look into a crystal ball, but I try to use a combination of what I’m hearing through the grapevine, stuff I’m reading, some info that is not yet in the public domain,
20 predictions for stem cells & regenerative medicine in 2018 Read More »
Nominations have closed for the 2017 Stem Cell Person of the Year Award and we have a great group of nominees. I’ve listed them below in alphabetical order, along with a bit of description of who they are, which includes in some cases the language used by the nominator(s). Where possible I’ve included a link
20 Stem Cell Person of The Year 2017 Award Nominees Read More »
Human germline CRISPR raises major bioethical considerations, but what about technical issues? Setting aside the many ethical issue about the general idea of human modification itself, could this really work? Yes in theory it could, but there are some very tough technological challenges that could and likely would cause failures or unacceptable outcomes at many steps
7 tech hurdles to human germline CRISPR Read More »
It’s germline, heritable human CRISPR time, right? Wrong. But the particularly enthusiastic supporters of heritable human CRISPR often cite hypothetical benefits in glowing terms, but either don’t mention risks or strongly downplay them. These fans also tend to leave alternative, proven and safe technologies such as preimplantation genetic diagnosis (PGD) out of the discussion or
Countering that Pro-Heritable Human CRISPR WSJ Piece Read More »
Scientist make knockout human embryos with CRISPR? Today we see a new Nature paper (Fogarty, et al.) on CRISPR “gene editing” of human embryos, this time from the UK from Kathy Niakan’s group. Niakan got UK permission about 18 months ago to CRISPR healthy human embryos so they’ve been hard at work since. Because Fredrik
1st Knockout Human Embryos Made with CRISPR: My Take on the Pub Read More »
Is it possible that CRISPR gene editing actually didn’t happen in many of the human embryos in that big Nature paper that made such news a couple weeks back? Some doubts have emerged that call the main conclusions of the paper into question and argue that more definitive studies are needed to be sure. An
Doubts raised on key points of Nature paper on CRISPR gene editing of human embryos Read More »
The FDA sent a stern letter today to Dr. John Zhang, PhD, MD, the physician who last year created a genetically modified human embryo in the U.S. and then exported it to Mexico where he self-reported creating a genetically modified baby boy. While the genetically modified baby created in Mexico was reportedly seemingly OK, it’s not clear
FDA chides US doc who genetically modified human embryo in reported 3-person IVF Read More »