An NIH-funded study indicates that the immune landscape of the hippocampus, a brain region critical for learning and memory, rapidly undergoes substantial remodeling beginning in midlife. This previously unrecognized shift suggests a mechanism by which aging may contribute to neurodegenerative disease.

By inducing specific patterns of activity in small portions of the brain in awake mice, researchers supported by the National Institutes of Health (NIH) have triggered a recalibration of neural connections that normally only occurs during sleep. This new approach offset the effects of sleep deprivation in memory tasks and revealed features of sleep that are key to its restorative effect.

A team of NIH researchers have unveiled new details about the events GLP-1 receptor agonists trigger within neurons, which have been largely unexplored until now. A study in mice identified key intracellular signaling processes that are tied to the weight-loss effects of the GLP-1 drug semaglutide. The findings improve our understanding of how increasingly prevalent GLP-1s may influence human behavior and identify new opportunities to potentially enhance treatment.

Findings from a study supported in part by the National Institutes of Health (NIH) have identified a new model for predicting outcomes for hypertrophic cardiomyopathy (HCM), a heart condition with a prevalence of 1 in 500 people and a frequent cause of sudden cardiac death. Specifically, the findings demonstrate that incorporating prospective data including clinical history, imaging, and blood biomarker data into risk assessment can improve prediction of adverse cardiac events in people with HCM.  

A National Institutes of Health (NIH)-funded study has found that an emerging class of GLP-1 weight-loss drugs suppress eating for pleasure, or hedonic feeding, in mice by modulating a reward circuit deep within the brain.