## Why does one toxic protein spare some neurons and destroy others? Amyloid-beta, the protein at the heart of Alzheimer's, does not kill every neuron identica
Four 2026 studies converge on one conclusion: brain aging is not the brain's problem alone. Peripheral CD8⁺ EMRA T-cell immunosenescence, plasma glucose with Mendelian Randomization causal evidence, and arterial wall cellular heterogeneity collapse are converging on the aging brain — while intracranial microglia and oligodendrocytes inflammage in near-perfect synchrony (Pearson r≈0.98). Understanding this multi-source siege reframes what prevention might realistically look like.
Ferroptosis and pyroptosis are two forms of cell death that rupture and splash pro-inflammatory cargo onto neighboring cells. Four 2026 studies — spanning skin fibroblasts, brain microglia and neurons, and diabetic kidneys — trace the same self-amplifying loop and identify three brake points: HIF-1α, stem-cell-secreted TSG-6, and puerarin's control of caspase-1.
Senescent cells have been the bad neighbor of aging biology for nearly two decades. Three 2026 papers flip the question: before we rush to clear them, do we even know what they are? Turns out we barely did — and now that we're learning, the picture is far less black and white.
A blue pill that might protect your brain, and a fiber classification system that's been misleading you for decades. Two stories about how oversimplified categories can steer us wrong.
Recent large-scale genetic analyses shatter the 'longevity gene' myth: the same genetic variant that lowers mortality in youth can increase risk in old age. From antagonistic pleiotropy to circadian rhythms, hippocampal plasticity, and cross-organ aging axes, unpacking the temporal tug-of-war of aging.