Researchers found that renal capillary blood flow in animals becomes refractory to restoration by reperfusion alone once artery occlusion exceeds roughly 10-30 minutes, with pericytes remaining constricted even after large-vessel flow resumes. Administering an intravenous bolus of the compound R(+)2501 after occlusion periods of up to 120 minutes rapidly restored red blood cell velocity and flux to healthy levels within about 6 minutes, and in some cases pushed flow above baseline.
Researchers built chains of spin-1 triangulene molecules on a superconducting Au(111)/Nb(110) surface and measured their behavior with scanning tunnelling spectroscopy. They found that chains with an odd number of units develop in-gap Yu-Shiba-Rusinov states tied to a collective spin-1 ground state, while even-length chains settle into a spin-0 state that stays decoupled from the superconductor.
Researchers examined a medium-entropy alloy, Nb45Ta25Ti15Hf15, alongside a simpler binary Nb70Ti30 alloy, testing their mechanical response at cryogenic temperatures down to 20 K. Using density functional theory, molecular dynamics with a machine-learning potential, and tensile experiments, they tracked how deformation shifts from dislocation glide to twinning as temperature drops, and assessed whether this shift affects the ductile-to-brittle transition.
Researchers generated chemically induced totipotent-like (ciToti) stem cell structures and tracked their single-cell transcriptomes across multiple stages, comparing them to natural mouse blastocysts at E3.5 and E4.5. The analysis identified progenitor and intermediate cell populations transitioning toward epiblast, trophectoderm and primitive endoderm lineages, mapping their developmental trajectories using pseudotime and distance-based methods.
Researchers report that the gene Elp1 is required for myeloid differentiation and for blood-derived cells to repopulate the brain as microglia-like cells. The findings draw on a growing body of work showing that transplanted hematopoietic cells can replace microglia in the central nervous system, a strategy already explored for treating genetic brain disorders in mice and humans.
Six alpacas were immunized with components of the human IL-10 receptor, and their blood samples were used to create a VHH phage library. This library was subjected to multiple rounds of panning against IL-10 receptor subunits to isolate specific antibody fragments. Additionally, humanized and knockout mouse lines were generated for further research applications.
Researchers built a sampling method covering 10% of the world's land area, selecting sites based on ten factors including biomes, elevation, government effectiveness, income levels and population density, broken into 89 distinct features. Using the Marxan conservation-planning software, they identified a representative sample of countries and territories to measure how much land is actually under conservation protection, building on an earlier study's methodology.
Researchers ran molecular dynamics simulations of a 1 M LiPF6 solution in ethylene carbonate solvent, comparing a machine-learned force field (QRNN) against a conventional empirical force field (OPLS4). The two methods produced markedly different molecular structures around lithium ions, with the QRNN simulations revealing previously unidentified clusters containing multiple lithium ions bound together.
A study of more than 100,000 people found that those with more 'active' brown fat—tissue that burns calories to generate heat—had lower rates of conditions including type 2 diabetes, depression and anxiety. Researchers used an AI model to measure active brown fat from medical scans and compared it against participants' health records. The findings were published in Nature.
Researchers used cryo-electron microscopy to solve structures of the IR8a-IR75k receptor complex from the malaria mosquito Anopheles stephensi, capturing it in ligand-free, ligand-bound, and open-channel states. The structures show how nonanoic and octanoic acid binding reshapes a pocket in IR75k, triggering domain closure that is mechanically transmitted to open the channel's pore, a mechanism confirmed through molecular dynamics simulations and electrophysiology experiments.
Researchers examined fossil evidence to determine how the first four-limbed vertebrates developed a distinct neck as they transitioned from water to land. The study identifies anatomical changes separating the skull from the shoulder girdle, a key step away from the fused head-body structure seen in fish ancestors.
Researchers report that alveolar stem cells, previously known mainly for producing gas-exchange cells in the lungs, also play a role in repairing damaged airway tissue. The finding expands the understood function of these cells beyond their traditional role in the alveoli.
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