May 30, 2020

The Niche

Knoepfler lab stem cell blog

Rudolf Jaenisch

3 min read

There’s much more to CRISPR-Cas9 than just gene editing and a new paper from the lab of Rudy Jaenisch in Cell highlights that in an exciting way. It reports epigenetic reversal of a Fragile X Syndrome phenotype in induced pluripotent stem cell (IPSC) neurons. Fragile X Syndrome is a neurological disorder in boys resulting from CGG repeat expansions in the regulatory region of the FMR1 gene and associated epigenetic alterations including DNA methylation that tend to shut off gene expression. The new paper, Liu, et al., …Read More

1 min read

What were the top posts here on The Niche for the past year? I’ve listed some of them below along with some posts from 2015 that remain highly read. Some top 2016 posts 20 Nominees for Stem Cell Person of the Year 2016 Award REGROW Act is Attack on Science-Based Stem Cell Trial Oversight Will new gene editing tech NgAgo challenge CRISPR? FDA Warning Letter to Irvine Stem Cell Treatment Center Clinics Across US Public stem cell skirmish erupts between Hanna & Jaenisch Controversy over …Read More

2 min read

Professor Rudolf Jaenisch of MIT and his former postdoc/now assistant professor at The Weizmann Jacob Hanna have gotten into a very public, stem cell skirmish over conflicting papers. Hanna raised concerns over a Jaenisch lab paper and things have escalated from there. This mess is playing out before our eyes on PubMed (there was a comment from Hanna on the Jaenisch lab paper, but now removed), PubPeer (scroll down near the bottom of the comments on that page for several items), on the website of the journal Cell …Read More

6 min read

Today marks nearing the completion of a full circle for one of science’s biggest controversies: the STAP cell fiasco. Today STAP cells are completely refuted with the publication of two new papers in Nature and we know much more–with some notable gaps still–about what went wrong. In January of last year, an international team of collaborators from RIKEN in Japan and Harvard/Brigham & Women’s Hospital (including the lab of Charles Vacanti where the STAP idea reportedly originated) here in the US published two Nature …Read More

25 min read

By Michael Cea Jeanne Loring of the Scripps Research Institute in La Jolla, California kindly sat down with me at the ISSCR annual meeting for a broad discussion of her history, views on the field and developments in the science. I found Jeanne a refreshing character, as I did a number of others I was fortunate to meet in Sweden. Her style I can only best describe as natural. It must be the Southern California air or something but there is a definite quality of relaxed …Read More

4 min read

Last week was a big one for the life sciences in that we saw the milestone of the first ever published paper reporting human embryo genetic modification (see here and here). It was one of those situations where we knew it was coming, but it was still a jolt. Not surprisingly this event sparked intense discussion and even some arguments. Below are 4 areas of contention at this moment and some additional thoughts on them. I value diverse views so please weight in with comments. A big deal …Read More