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The hidden skeleton “gatekeeper” inside brain cells could help fight Alzheimer's

5 hours 59 minutes ago
Researchers have discovered that a microscopic skeleton inside neurons does much more than hold cells together. It acts as a gatekeeper that controls what brain cells absorb and when they absorb it. When this protective structure weakens, neurons rapidly take in harmful proteins associated with Alzheimer's disease, suggesting that stabilizing it could become a promising new strategy for preventing brain cell damage.

A comparative evaluation of brain MRI modalities, modality-specific measures, brain regions, and cognitive tests for brain age prediction

10 hours 37 minutes ago
Brain age estimation using machine learning has gained significant attention as a promising approach to assess cognitive health and aging. By analyzing structural and functional MRI data, these models can predict an individual's brain age, providing insights into neurological conditions and potential interventions. The purpose of this study is to compare the performance of different MRI modalities in predicting brain age and to determine the relative importance of specific brain regions. In this...
Hami Mahdavinataj

Age-associated microglial heterogeneity includes emergence of mobile microglial states

10 hours 37 minutes ago
Microglia maintain neuronal homeostasis through dynamic surveillance strategies that depend on their functional state. In the healthy brain, highly ramified microglia monitor neuronal integrity via motile processes and transient soma contacts. Aging is associated with reduced process motility and diminished expression of homeostatic markers, raising the question of how microglial surveillance adapts to these changes. Here, we used ex vivo time-lapse imaging of acute cortical slices from young...
Sunitha Subhramanian