Low-Level Drinking Was Not Invisible to the Aging Cortex TL;DR: Even drinking within low-risk guidelines was linked to lower cortical blood flow and thinner cortex when lifetime exposure met advancing age. Key Findings All participants stayed under 60 drinks per month: The cohort excluded alcohol use disorder and focused on healthy non-smoking adults reporting low-level …
Lifetime Cognitive Enrichment Delayed Alzheimer’s Dementia TL;DR: In 1,939 Rush Memory and Aging Project participants, higher lifetime cognitive enrichment was linked to 38% lower Alzheimer’s dementia hazard and about 5 years later dementia onset. Key Findings 1,939 dementia-free adults: Participants were older adults from Northeastern Illinois in the Rush Memory and Aging Project, with a …
Ketamine Restored Reward Bias Across Species TL;DR: Ketamine restored reward-learning bias in both treatment-resistant depression and chronically stressed rats while leaving basic discrimination unchanged. Key Findings Reward bias increased: Ketamine significantly increased response bias toward the more frequently rewarded stimulus in both species. Healthy-control levels returned: The reward-bias effect reached levels comparable with healthy controls …
EPA Rewired Brain Vessels After Repetitive Brain Injury TL;DR: Fish-oil-derived EPA looked less like a simple neuroprotective supplement and more like a lipid signal that changed brain-vessel repair after repetitive mild traumatic brain injury. Key Findings EPA accumulated before injury: In a fish-oil diet model, eicosapentaenoic acid built up in the brain at baseline rather …
Mediterranean Diet Linked Mitochondrial Microproteins TL;DR: Mediterranean diet adherence tracked with higher mitochondrial microproteins Humanin and SHMOOSE in older adults, pointing to a possible mitochondrial route for healthy-aging benefits. Key Findings Higher adherence tracked with SHMOOSE: Patients with stronger Mediterranean diet adherence showed higher circulating SHMOOSE levels. Humanin moved with diet and Nox2: Humanin was …
Dopamine Disruption May Start Alzheimer’s Memory Failure TL;DR: In an Alzheimer’s mouse model, early memory failure tracked a broken dopamine signal into the lateral entorhinal cortex, and both optogenetic dopamine reactivation and L-DOPA partially restored learning. Key Findings Early learning slipped: Young APP knock-in mice reached 78.6% correct trials in the final learning block, compared …
C4A Broke Away From C1Q in First-Episode Psychosis TL;DR: In cerebrospinal fluid from people with first-episode psychosis, the usual positive relationship between C4A and C1Q disappeared, while C4A’s broader immune-network pattern shifted sharply in a way C4B did not. Key Findings C4A-C1Q coupling broke in psychosis: The study compared 113 patients with first-episode psychosis against …
In Borderline Personality Disorder, Loneliness Tracked a Gap Between Self-View and Expectations TL;DR: In borderline personality disorder, loneliness was higher when patients rated themselves as especially prosocial and justice-sensitive but did not expect the same level of fairness or concern from other people. Key Findings Self-view and expectations diverged in BPD: Treatment-seeking patients showed bigger …
Astrocyte BMP Suppression Eased Fragile X Signals TL;DR: In a fragile X mouse model, suppressing BMP signaling specifically in astrocytes reduced sound-triggered seizure severity and partially restored synaptic activity in the auditory cortex, a sound-processing region relevant to sensory over-responsiveness. Key Findings BMP signaling was elevated in fragile X astrocytes: The study focused on bone …
Childhood Trauma Made Teen Depression Networks More Random TL;DR: In 343 adolescents with major depression, childhood trauma was linked to less efficient brain-network organization, partial normalization after treatment, and an fMRI-based model that predicted antidepressant response with 82% balanced accuracy. Key Findings 343 depressed adolescents scanned: The study analyzed resting-state functional MRI (fMRI) in adolescents …
