@mitchell-lab.bsky.social

Regulation of transcription, stem cells, and trying to figure out the regulatory code. The Mitchell Lab at the U of Toronto.

It's #WorldHealthDay Since 2000, maternal deaths globally declined by 40%! 💙 BUT—progress is slowing, and aid funding cuts mean major threats to lifesaving maternity services in many parts of the world. ❌

Access alone is not enough; people need high-quality care. Fewer women are dying in childbirth as access to health care has increased.Maternity service coverage has increased.Access to health care saves lives. Pregnancy can be a dangerous time in a woman's life.

Our work on the enhancers regulating Sox2 in neural stem cells is published! This one has been a long time in the works. We found a cluster of downstream enhancers, including the more well studied SRR2, are required to maintain Sox2 expression and anterior neural identity. doi.org/10.1093/g3jo...

A Sox2 Enhancer Cluster Regulates Region-Specific Neural Fates from Mouse Embryonic Stem Cells

Abstract. Sex-determining region Y box 2 (Sox2) is a critical transcription factor for embryogenesis and neural stem and progenitor cell (NSPC) maintenance

doi.org

Out now in @ScienceAdvances A great team effort, spearheaded by Angeliki, showing that promoter and enhancer dynamics become homogenized on transcriptional activation, and that loop extrusion and transcription compete to put brakes on chromatin doi.org/10.1126/scia...

Transcription processes compete with loop extrusion to homogenize promoter and enhancer dynamics

Gene promoters and enhancers share the same constrained mobilities during transcription, opposing cohesin-mediated loop extrusion.

doi.org

The cells are all-right: Regulation of the Lefty genes by separate enhancers in mouse embryonic stem cells. How are 2 genes separately regulated even though they are fairly close to each other in the genome, we find a primary role for gene separation distance. journals.plos.org/plosgenetics...

The cells are all-right: Regulation of the Lefty genes by separate enhancers in mouse embryonic stem cells

Author summary Our study explores how two closely related genes, Lefty1 and Lefty2, are regulated independently despite their proximity in the genome. Both genes play important roles in stem cell main...

journals.plos.org