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

Sex-determining region Y box 2 (Sox2) is a critical transcription factor for embryogenesis and neural stem and progenitor cell (NSPC) maintenance. While distal enhancers control Sox2 in embryonic stem cells (ESCs), enhancers closer to the gene are implicated in Sox2 transcriptional regulation in neural development. We hypothesize that a downstream enhancer cluster, termed Sox2 regulatory regions 2-18 (SRR2-18), regulates Sox2 transcription in neural stem cells and we investigate this in NSPCs derived from mouse ESCs.

Photocatalytic C-C Bond Azidation and Cyanation of Acyclic Ketones via a Pro-aromatic Intermediate.

Herein, we report a formal C-C bond azidation and cyanation of unactivated aliphatic ketones using commercially available tosyl azide and cyanide, respectively. A visible-light-mediated organophotocatalyst enables radical azidation and cyanation of ketone-derived pro-aromatic dihydroquinazolinones (under mostly redox-neutral conditions) as supported by preliminary mechanistic studies. These metal-free and scalable protocols can be used to synthesize tertiary, secondary, and primary alkyl azides and nitriles with good functional group tolerance and postsynthetic diversification of the azide group, including bioconjugation.

Comparing new tools of artificial intelligence to the authentic intelligence of our global health students.

Introduction: The transformative feature of Artificial Intelligence (AI) is the massive capacity for interpreting and transforming unstructured data into a coherent and meaningful context. In general, the potential that AI will alter traditional approaches to student research and its evaluation appears to be significant. With regard to research in global health, it is important for students and research experts to assess strengths and limitations of GenAI within this space.

A Case Series and Brief Review of Literature on Encapsulating Peritoneal Sclerosis: Unveiling the Cocoon.

This case series explores four distinct instances of encapsulating peritoneal sclerosis (EPS), a rare but serious condition characterized by the encapsulation of abdominal viscera, commonly referred to as abdominal cocoon. EPS is associated with severe complications, including bowel obstruction and sepsis, which can significantly impact patient outcomes. The first case involves a 41-year-old male patient who had undergone a liver transplant and ultimately succumbed to extensively drug-resistant (XDR) sepsis.

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

Enhancers play a critical role in regulating precise gene expression patterns essential for development and cellular identity; however, how gene-enhancer specificity is encoded within the genome is not clearly defined. To investigate how this specificity arises within topologically associated domains (TAD), we performed allele-specific genome editing of sequences surrounding the Lefty1 and Lefty2 paralogs in mouse embryonic stem cells. The Lefty genes arose from a tandem duplication event and these genes interact with each other in chromosome conformation capture assays which place these genes within the same TAD.