Summary: Researchers have discovered that aging drives a substantial and previously unrecognized migration of bone marrow–derived immune cells from the blood into the human brain. This finding overturns the long-standing view that the brain’s immune compartment is entirely maintained by resident microglia established before birth and isolated from peripheral influence. Key Facts Shifts long-held neuroimmunology … Read more

Summary: Researchers identified a specific structural change in the hippocampus linked with depression in older adults. High-resolution MRI scans from 2,009 cognitively unimpaired adults aged 50 to 90 showed that those with depression had significantly smaller volume in the CA23DG hippocampal subfield, a combined region made up of CA2, CA3 and the dentate gyrus. Key … Read more

Summary: The common marmoset, a New World primate closely related to humans, naturally shows age-related cognitive decline, making it a valuable model for neurodegenerative disease research. Using a telomere-to-telomere (T2T) reference together with population genomic data from 230 individuals, researchers at the UC Santa Cruz Genomics Institute produced a complete, gapless marmoset genome and mapped … Read more

Summary: A new study shows a novel approach using ChatGPT (GPT-4) to generate, validate, and predict population-level responses to personality assessment questionnaires derived from any source text. The research team tested this method by creating questionnaires from two very different texts: the clinical Diagnostic and Statistical Manual of Mental Disorders (DSM-5) and a popular astrology … Read more

Summary: Researchers propose the Reproductive Resilience Hypothesis (RRH), a new evolutionary framework that reinterprets the relationship between reproduction and lifespan. RRH challenges classical trade-off models by arguing that, in many species, the sex that invests most in reproduction often evolves stronger somatic resilience mechanisms, which can produce longer lifespans rather than shorter ones. The authors … Read more

Summary: Researchers have identified a new, toxic pathway by which tau protein promotes Alzheimer’s disease and related tauopathies. The team found that hyperphosphorylated tau can enter neuronal mitochondria and bind directly to a core electron transport chain subunit, NDUFS3. This interaction distorts NDUFS3’s structure, jams electron flow and forces electrons to move in reverse — … Read more

Summary: Researchers have identified a dynamic physical mechanism in the adult brain that helps regulate learning plateaus and preserve mastered skills. The study shows that the extracellular matrix (ECM)—a scaffold-like network surrounding neurons—undergoes rapid daily remodeling in the auditory cortex: it loosens within hours after practice to permit synaptic change, then rebuilds within about 24 … Read more

Summary: Researchers examined how people perceive and interpret nonordinary experiences (NOEs)—events such as out-of-body episodes, extrasensory perception, and sensing an unseen presence. Using a newly validated 47-item Inventory of Nonordinary Experiences with a large general-population sample of 5,117 adults, the study distinguished the raw context of the events from the cognitive appraisal and long-term meaning-making … Read more

Summary: Maintaining normal blood pressure, avoiding diabetes, and not smoking between roughly ages 48 and 68 is associated with nearly 13 additional years of life free from dementia, according to a long-term community study. The research also found consistent differences across sex and race: women lived longer without dementia than men at comparable risk levels, … Read more

Summary: Researchers have identified thousands of previously unannotated, tumor-specific genetic isoforms in glioblastoma that were undetectable with conventional short-read sequencing. A subset of these novel isoforms is predicted to bind strongly to major histocompatibility complex (MHC) class I molecules, representing a newly described class of potential neoantigens. This atlas and the validated analytical framework expand … Read more