It’s a particularly exciting time for the stem cell field. One of the most notable developments in the last year or so is the production and preliminary study of a totally new type of human embryonic stem cells (ESC) made by nuclear transfer instead of using leftover in vitro fertilization (IVF) embryos. This process of so-called […]
Dieter Egli Interview: NT-ES cells, IPSC, Mitochondrial Transfer, & More Read More »
A paper retraction is a major, painful step in science, but sometimes it is necessary and in the past few weeks we’ve seen news of two high-profile stem cell paper retractions. However, these retractions were handled entirely differently by those involved and were prompted by very distinct situations. Update: for some background on stem cell
A tale of two stem cell retractions: stark contrast between Macchiarini & Egli Read More »
An important new Cell Stem Cell paper from Dieter Egli’s lab points to an inherent, serious problem with so-called 3-person IVF or mitochondrial replacement technology that warrants putting an immediate hold on all efforts to use it in humans. I have pasted the graphical abstract from the paper below. For years a few of us scientists and
UK should freeze mitochondrial replacement as Egli paper ID’s serious problem Read More »
My to-read list this weekend includes a range of papers along with various news & media including a report of two US research groups aiming to get CRISPR baby patents. More on that below. At long last a trip + fun thing to do in NYC Last week I took my first trip in more
Weekly reads: escape to New York, CRISPR baby patents, ISSCR guidelines, pubs Read More »
Three new studies reported in preprints all show severe DNA damage to human embryos from CRISPR a surprisingly high percentage of the time including in some cases loss of heterozygosity (LOH). Anywhere from about a quarter to half of CRISPR’d embryos exhibited major genome damage. As readers of The Niche know, I never was a
CRISPR often damages human embryo chromosomes Read More »
Despite the COVID-19 pandemic there are still some research things we can do including data analysis as well as reading new papers and media articles on science, including regenerative medicine. If the weather’s good and you have wi-fi (or you print articles still on paper) you can even do this out in the fresh air
Recommended regenerative medicine reads plus COVID-19 stem cell hype Read More »
Is monkey cloning a good idea? We’re about to find out. A new Cell paper today reports the first cloning of monkeys via somatic cell nuclear transfer (SCNT), raising many questions. The paper from a team led by Qiang Sun is entitled, “Cloning of Macaque Monkeys by Somatic Cell Nuclear Transfer.” The highlight bullet points
Is monkey cloning a breakthrough or a bad idea? 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 »
What really happened at the DNA level in the experiments in that high-profile CRISPR of human embryos paper from a team led by Shoukhrat Mitalipov at OHSU? Is the team right that they successfully conducted CRISPR of human embryos to correct a mutant gene, as they reported in their Ma, et al. Nature paper? Or is the Egli,
Mulling over that Mitalipov human embryo CRISPR pub, still many questions 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 »