Divergent WNT signaling and drug sensitivity profiles within hepatoblastoma tumors and organoids.

Hepatoblastoma, the most prevalent pediatric liver cancer, almost always carries a WNT-activating CTNNB1 mutation, yet exhibits notable molecular heterogeneity. To characterize this heterogeneity and identify novel targeted therapies, we perform comprehensive analysis of hepatoblastomas and tumor-derived organoids using single-cell RNA-seq/ATAC-seq, spatial transcriptomics, and high-throughput drug profiling. We identify two distinct tumor epithelial signatures: hepatic 'fetal' and WNT-high 'embryonal', displaying divergent WNT signaling patterns.

Diversity, Equity, and Inclusion: Obstetrics and Gynecologist Hospitalists' Impact on Maternal Mortality.

Obstetrics and gynecology hospitalists play a vital role in reducing maternal morbidity and mortality by providing immediate access to obstetric care, especially in emergencies. Their presence in hospitals ensures timely interventions and expert management, contributing to better outcomes for mothers and babies. This proactive approach can extend beyond hospital walls through education, advocacy, and community outreach initiatives aimed at improving maternal health across diverse settings.

Insurer costs of COVID-19 by disease severity and duration.

Objectives: To analyze US commercial insurance payments associated with COVID-19 as a function of severity and duration of disease.

Study Design: Retrospective database analysis.

Methods: Patients with COVID-19 between April 1, 2020, and June 30, 2021, in the Merative MarketScan Commercial database were identified and stratified as having asymptomatic, mild, moderate (with and without lower respiratory disease), or severe/critical (S/C) disease based on the severity of the acute COVID-19 infection.

Human fetal brain self-organizes into long-term expanding organoids.

Human brain development involves an orchestrated, massive neural progenitor expansion while a multi-cellular tissue architecture is established. Continuously expanding organoids can be grown directly from multiple somatic tissues, yet to date, brain organoids can solely be established from pluripotent stem cells. Here, we show that healthy human fetal brain in vitro self-organizes into organoids (FeBOs), phenocopying aspects of in vivo cellular heterogeneity and complex organization.