2022-08-18

Chromatin structure undergoes global and local reorganization during murine dendritic cell development and activation

Significance Dendritic cells (DCs), essential for immune responses, originate from bone marrow hematopoietic stem cells via intermediate progenitors. In eukaryotic nuclei, DNA is packaged into 3D chromatin structures that have been implicated in gene regulation. However, the chromatin structure reorganization dynamics during DC differentiation remain unknown. Here, we analyzed 3D chromatin structures in DCs and their progenitors. In genomic regions at DC-specific genes, the 3D chromatin structures were reorganized upon DC differentiation. The transcription factor IRF8 promoted chromatin structure changes in DC progenitors, leading to DC-specific gene induction. Strikingly, the chromatin structures of infection-inducible genes were preestablished in unstimulated DCs. Our findings advance the understanding of DC biology and basic principles of gene regulation for cell differentiation and host defense.
2022-07-14

A panel of nanobodies recognizing conserved hidden clefts of all SARS-CoV-2 spike variants including Omicron

We are amid the historic coronavirus infectious disease 2019 (COVID-19) pandemic. Imbalances in the accessibility of vaccines, medicines, and diagnostics among countries, regions, and populations, and those in war crises, have been problematic.
2022-05-30

Rapid screening using pathomorphological interpretation to detect BRAFV600E mutation and microsatellite instability in colorectal cancer

Purpose: Rapid decision-making is essential in precision medicine for initiating molecular targeted therapy for patients with cancer. This study aimed to extract pathomorphologic features that enable the accurate prediction of genetic abnormalities in cancer from hematoxylin and eosin images using deep learning (DL).
2022-05-27

Temperature sensitivity of DNA double-strand break repair underpins heat-induced meiotic failure in mouse spermatogenesis

Mammalian spermatogenesis is a heat-vulnerable process that occurs at low temperatures, and elevated testicular temperatures cause male infertility. However, the current reliance on in vivo assays limits their potential to detail temperature dependence and destructive processes.