Category: Biology
- ACTH-linked antioxidant signaling protects adrenal cells in mouse experiments ()
Published October 29, 2026. Researchers linked dexamethasone-induced adrenal cell death in mice to weakened antioxidant defenses and mitochondrial oxidative stress. ACTH co-treatment reduced damage. Cell experiments implicated an ACTH–SF1–NRF2 pathway supporting antioxidant gene expression. Human tissue comparisons showed related abnormalities, but this was not a clinical treatment trial. The findings identify a potential protective mechanism; […]
- Resiquimod partially enriches bull sperm fractions without impairing cryosurvival at selected doses ()
Published October 29, 2026. A new cattle study examines whether resiquimod can partially separate sperm carrying X or Y chromosomes while preserving their ability to withstand freezing and thawing. Researchers processed 24 ejaculates from three Frieswal bulls using three resiquimod concentrations. After incubation, they collected upper and lower fractions, cryopreserved them and assessed sperm quality […]
- Cryo-electron tomography reveals local organization of the human mitotic spindle ()
Published October 29, 2026. Cryo-electron tomography is revealing how short microtubules organize into the machinery that separates chromosomes during human cell division. Conway and colleagues report the findings today in Nature Communications. The mitotic spindle must build a coherent bipolar structure from filaments that do not necessarily span the distance between a spindle pole and […]
- Darutigenol links gut microbial proline production to colitis improvement in mice ()
Published October 29, 2026. A preclinical study links the anti-inflammatory effects of darutigenol to gut microbial metabolism. Li and colleagues published the findings today in Nature Communications. Using male mice with experimental colitis, the researchers combined multi-omics analyses with fecal microbiota transplantation experiments to investigate the compound’s effects. The benefit depended on the gut microbiota. […]
- Bone anabolic agents restore tooth-supporting bone in diabetic mice ()
Published October 29, 2026. A mouse study reports that parathyroid hormone (PTH) and abaloparatide can increase tooth-supporting bone under diabetic conditions. Turkkahraman and colleagues published the findings today in the International Journal of Oral Science. The researchers used an established type 2 diabetes model induced by a high-fat diet and streptozotocin. After four weeks of […]
- Extracellular matrix shapes stability of stem-cell-derived retinal pigment cells ()
Published October 29, 2026. A cell-culture study shows how the surrounding extracellular matrix influences the stability of retinal pigment epithelium derived from human induced pluripotent stem cells. Kumar and Palakkan report the findings today in Scientific Reports. Cells grown on collagen or fibronectin progressively lost pigmentation, epithelial organization and markers of retinal pigment epithelium function. […]
- Urolithin A improves post-thaw turkey sperm quality and fertility in study ()
Published October 29, 2026. Urolithin A improved post-thaw sperm quality and reproductive outcomes in a turkey semen study published October 27 in Scientific Reports. The work explores an additive for avian germplasm banking. The researchers tested seven independent pooled semen samples using a glucose-based freezing diluent with no additive or 1, 5 or 10 micromolar […]
- Mitochondrial peptide delivery supports cryopreserved ovarian grafts in rabbits ()
Published October 29, 2026. A rabbit study explores mitochondrial protection after ovarian tissue cryopreservation and transplantation. Published October 28 in npj Regenerative Medicine, the work tests localized delivery of the antioxidant peptide elamipretide, also called SS31. Ovarian grafts face several sources of injury, including oxidative stress and the interruption and restoration of blood supply. The […]
- Hi-APEX enables spatial molecular mapping without added hydrogen peroxide ()
Published October 29, 2026. A new proximity-labeling method maps molecular neighborhoods without adding hydrogen peroxide. Chen and colleagues introduce Hi-APEX today in Nature Chemical Biology. Conventional APEX2 labeling requires hydrogen peroxide, which can disturb the redox-sensitive processes researchers want to observe. Hi-APEX instead uses a clickable tetrazine-phenol probe with the existing enzyme. The labeling reaction […]
- Bacterial extracellular matrix yields a light-crosslinked hydrogel for bioprinting ()
Published October 29, 2026. A bacterial extracellular matrix provides the starting material for a printable, cell-compatible hydrogel. Radmehr and colleagues describe the biofabrication platform today in Communications Materials. The approach uses extracellular polymeric substances produced by Acinetobacter baylyi ADP1. These substances contain a mixture of polysaccharides and proteins, offering a multicomponent alternative to hydrogels built […]