98%
921
2 minutes
20
The cell fate transition from radial glial-like (RGL) cells to neurons and astrocytes is crucial for development and pathological conditions. Two chromatin repressors-the enhancer of zeste homolog 2 and suppressor of variegation 4-20 homolog-are expressed in RGL cells in the hippocampus, implicating these epigenetic regulators in hippocampal cell fate commitment. Using a double knockout mouse model, we demonstrated that loss of both chromatin repressors in the RGL population leads to deficits in hippocampal development. Single-nuclei RNA-Seq revealed differential gene expression and provided mechanistic insight into how the two chromatin repressors are critical for the maintenance of cycling cells in the dentate gyrus as well as the balance of cell trajectories between neuronal and astroglial lineages.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/1873-3468.14254 | DOI Listing |
JBMR Plus
October 2025
Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia.
Genome-wide association studies (GWAS) relevant to osteoporosis have identified hundreds of loci; however, understanding how these variants influence the phenotype is complicated because most reside in non-coding DNA sequence that serves as transcriptional enhancers and repressors. To advance knowledge on these regulatory elements in osteoclasts (OCs), we performed Micro-C analysis, which informs on the genome topology of these cells and integrated the results with transcriptome and GWAS data to further define loci linked to BMD. Using blood cells isolated from 4 healthy participants aged 31-61 yr, we cultured OC in vitro and generated a Micro-C chromatin conformation capture dataset.
View Article and Find Full Text PDFPlant J
September 2025
Université de Strasbourg, CNRS, IBMP UPR 2357, Strasbourg, France.
Trimethylation of histone H3 at lys36 (H3K36me3) promotes gene transcription and governs plant development and plant responses to environmental cues. Yet, how H3K36me3 is translated into specific downstream events remains largely uninvestigated. Here, we report that the Arabidopsis PWWP-domain protein HUA2 binds methyl-H3K36 in a PWWP motif-dependent manner.
View Article and Find Full Text PDFCurr Opin Microbiol
August 2025
Institute for Advanced Biosciences (IAB), Team Host-pathogen interactions and immunity to infection, INSERM U1209, CNRS UMR5309, University Grenoble Alpes, Grenoble, France. Electronic address:
Toxoplasma gondii, a widespread apicomplexan parasite, navigates a complex life cycle in which it switches back and forth between tachyzoites and bradyzoites to balance acute infection and persistence while also undergoing an often-overlooked one-way commitment to the sexual stage. Emerging evidence suggests that Toxoplasma's developmental trajectories are orchestrated by an interconnected network of transcriptional switches and chromatin remodeling mechanisms, acting in concert to ensure robust stage transitions. This review outlines an updated epigenetic framework for stage transitions and highlights the functional synergy between an Imitation SWItch family chromatin remodeler and the MORC/HDAC3 repressor complex, which together modulate chromatin accessibility to maintain or shift developmental states.
View Article and Find Full Text PDFGenes Chromosomes Cancer
July 2025
Molecular Biology Laboratory, Instituto Valenciano de Oncología, Valencia, Spain.
We report a uterine myxoid mesenchymal tumor with a novel SS18::VEZF1 gene fusion. The current lesion was identified in a 53-year-old woman who presented with symptomatic "fibroids" showing accelerated growth and heterogeneous morphology on radiologic assessment. Microscopic examination revealed a well-demarcated neoplasm, and the tumor exhibited alternating hypocellular/hyalinized and hypercellular areas, composed of a monomorphic proliferation of spindle, ovoid, and epithelioid cells arranged in sheets.
View Article and Find Full Text PDFNat Commun
August 2025
Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA.
Programmable epigenome editors modify gene expression in mammalian cells by altering the local chromatin environment at target loci without inducing DNA breaks. However, the large size of CRISPR-based epigenome editors poses a challenge to their broad use in biomedical research and as future therapies. Here, we present Robust ENveloped Delivery of Epigenome-editor Ribonucleoproteins (RENDER) for transiently delivering programmable epigenetic repressors (CRISPRi, DNMT3A-3L-dCas9, CRISPRoff) and activator (TET1-dCas9) as ribonucleoprotein complexes into human cells to modulate gene expression.
View Article and Find Full Text PDF