
Berkeley Genomics Project
560 posts

Berkeley Genomics Project
@BerkeleyGenomic
Unlock the promise of safe, accessible, powerful reprogenetics. Independent nonprofit. Book on methods for strong reprogenetics: https://t.co/GBOjkvX0nB






Embryo editing is the most archetypal "active" reprogenetic method (the "non-active" method being preimplantation genetic testing). It's concrete and understandable, in outline. But it's probably not actually very important, in the grand scheme of things. Embryo editing is quite difficult. Yes, the research on precision editing is underpursued due to societal/ethical concerns that are legitimate but ultimately overemphasized, and yes this implies directionally that the research might be easier than expected. But the research is just difficult. Or to put it another way, the approach is just not that feasible. If you're wanting to do strong reprogenetics, and you're using gene editors, you're going to need to make hundreds of edits. Mosaicism means live validation is not feasible, so you'd need super-duper-high-precision editing, which doesn't exist. More important approaches involve operating on stem cells (e.g. iterated editing with validation; chromosome selection; iterated meiotic selection), which is then followed by epigenomic corrected to produce gametes / a zygote. (Or, maybe, chromosome selection on epigenomically correct chromosomes from sperm or embryos.) These methods would be very powerful and very safe. They are also probably easier than safe very-multiplex embryo editing, as well as more live verifiable. Embryo editing has a place. Before other methods are available, embryo editing could offer a good risk/reward tradeoff for parents who cannot naturally get many or any embryos that don't have some very harmful single variant. If nothing else--even if embryo editing cannot actually be made safe enough at all--the venture gives an opportunity to work out what sort of validation is required for safety for active reprogenetics methods. But it's not a top priority for getting to strong safe reprogenetics.




















