Epigenetic age acceleration is a distinctive trait of epithelioid sarcoma with potential therapeutic implications.

Recently, DNA methylation clocks have been proven to be precise age predictors, and the application of these clocks in cancer tissue has revealed a global age acceleration in a majority of cancer subtypes when compared to normal tissue from the same individual. The polycomb repressor complex 2 plays a pivotal role in the aging process, and its targets have been shown to be enriched in CpG sites that gain methylation with age. This complex is further regulated by the chromatin remodeling complex SWItch/Sucrose Non-Fermentable and its core subunit, notably the tumor suppressor gene SMARCB1, which under physiological conditions inhibits the activity of the polycomb repressor complex 2.

The Role of Polycomb Proteins in Cell Lineage Commitment and Embryonic Development.

Embryonic development is a highly intricate and complex process. Different regulatory mechanisms cooperatively dictate the fate of cells as they progress from pluripotent stem cells to terminally differentiated cell types in tissues. A crucial regulator of these processes is the Polycomb Repressive Complex 2 (PRC2).

Loss of PRC2 subunits primes lineage choice during exit of pluripotency.

Polycomb Repressive Complex 2 (PRC2) is crucial for the coordinated expression of genes during early embryonic development, catalyzing histone H3 lysine 27 trimethylation. Two distinct PRC2 complexes, PRC2.1 and PRC2.

Two Functional Axes of Feedback-Enforced PRC2 Recruitment in Mouse Embryonic Stem Cells.

Polycomb Repressive Complex 2 (PRC2) plays an essential role in gene repression during development, catalyzing H3 lysine 27 trimethylation (H3K27me3). MTF2 in the PRC2.1 sub-complex, and JARID2 in PRC2.

Non-invasive detection of actionable mutations in advanced non-small-cell lung cancer using targeted sequencing of circulating tumor DNA.

Objective: To evaluate the feasibility of detecting actionable gene mutations in circulating tumor DNA (ctDNA) in patients with advanced non-small-cell lung cancer (NSCLC) using targeted next-generation sequencing (NGS).

Materials And Methods: In total 50 plasma samples from patients newly diagnosed with advanced NSCLC or resistant to first-line tyrosine kinase inhibitors (TKIs) were subjected to deep sequencing on a seven-gene panel (BRAF, EGFR, ERBB2, KRAS, NRAS, PIK3CA, PTEN) incorporated with molecular barcodes to improve accuracy in variant detection. When possible, results were compared with those from matched tissue samples.

A Roadmap for Human Liver Differentiation from Pluripotent Stem Cells.

How are closely related lineages, including liver, pancreas, and intestines, diversified from a common endodermal origin? Here, we apply principles learned from developmental biology to rapidly reconstitute liver progenitors from human pluripotent stem cells (hPSCs). Mapping the formation of multiple endodermal lineages revealed how alternate endodermal fates (e.g.