BrainASAP

Mutant Huntingtin Suppressed CSE and Depleted Cysteine in Huntington Disease

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CSE Loss Exposed a Huntington Neurodegeneration Route

TL;DR: Huntington disease may exploit a metabolic weak point: mutant huntingtin suppresses CSE, depleting cysteine biology in vulnerable striatal tissue, while cysteine rescue reversed abnormalities in models. Key Findings CSE was depleted: The Nature abstract reports major depletion of CSE, the cysteine-biosynthetic enzyme, in Huntington disease tissues. Transcriptional defect implicated: The defect appeared to occur …

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Immature Hippocampal Neurons Marked Cognitive Resilience in Alzheimer’s Brains

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Immature Neurons Linked to Alzheimer’s Resilience

Immature Neurons Linked to Alzheimer’s Resilience TL;DR: A 2026 Cell Stem Cell study used single-nucleus RNA sequencing of aged human hippocampus tissue and found rare immature neurons in healthy, Alzheimer’s, and dementia-resilient brains. The important signal was not simply whether these cells existed. It was how their gene activity changed in Alzheimer’s disease and in …

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Early Life Stress Rewired Gut Nerves and Visceral Pain Pathways

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Early Stress Rewired the Gut's Nerves, Not Just the Brain

Early Stress Rewired the Gut’s Nerves, Not Just the Brain TL;DR: Early life stress produced lasting gut pain and motility changes through enteric and sympathetic nerve pathways, with pediatric cohort data pointing in the same direction. Key Findings Maternal separation produced gut hypersensitivity: The mouse model developed visceral pain sensitivity and lasting motility defects. Motility …

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Locus Coeruleus Axon Loss May Explain Alzheimer’s Smell Loss

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Early Locus Coeruleus Axon Loss May Explain Smell Loss in Alzheimer’s

Early Locus Coeruleus Axon Loss May Explain Smell Loss in Alzheimer’s TL;DR: Alzheimer’s-model mice lost noradrenergic locus coeruleus axons in the olfactory bulb before major plaque buildup, took 60% longer to find buried food, and improved when microglial phagocytosis was reduced. Key Findings 3-month axon loss before heavy plaque load: AppNL-G-F mice showed a selective …

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Whole-Spinal-Cord MRI Could Detect Silent MS Lesions Missed by Brain MRI

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Spinal Cord MRI Could Change Early MS Follow-Up

Spinal Cord MRI Could Change Early Multiple Sclerosis Follow-Up TL;DR: Routine MS monitoring focuses on the brain — but prior data suggest 12% of new spinal cord lesions appear with no simultaneous brain activity. The MSpine trial is now testing whether systematic whole-spine MRI catches disease that standard follow-up is missing. Key Findings 31.2% of …

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AVATAR Therapy Outperformed CBT at 3 Months for Auditory Hallucinations

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AVATAR Therapy Outlasted CBT for Auditory Hallucinations

AVATAR Therapy Outlasted CBT for Auditory Hallucinations TL;DR: AVATAR therapy matched CBT on voice severity right after treatment, then pulled ahead at 3 months — with roughly half the sessions. A 26-trial meta-analysis, 2,273 patients. Key Findings No clear edge at treatment end: AVATAR did not significantly beat CBT on voice severity right after therapy …

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GBA1 Parkinson’s Risk Carriers Showed Gut Microbiome Changes Before Symptoms

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Gut Microbiome Signal Appeared Before Parkinson’s Symptoms

Gut Microbiome Signal Appeared Before Parkinson’s Symptoms in GBA1 Carriers TL;DR: In people carrying a genetic risk factor for Parkinson’s but not yet symptomatic, about 25% of their gut microbiome signature already looked intermediate between healthy controls and diagnosed patients — and the shift tracked with early warning signs like sleep disruption and smell loss. …

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SuperAgers Kept Youthful Memory With Preserved Cortex and Larger Entorhinal Neurons

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SuperAgers Reveal Biology of Preserved Memory

SuperAgers Reveal Brain Biology of Preserved Memory TL;DR: Octogenarians who recall words like 50-year-olds carry a distinct brain profile: preserved cortical volume, a cingulate cortex thicker than younger adults, larger entorhinal neurons, fewer inflammatory microglia, and more von Economo neurons — the biology is real, not just motivational. Key Findings Age-80 memory matched 50-to-60-year-olds: SuperAgers …

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Autism Severity Tracked Frontoparietal-DMN Connectivity Across ADHD and Autism

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Autism Severity Showed Up in a Shared ADHD Connectome

Autism Severity Showed Up in a Shared ADHD Connectome TL;DR: In 166 verbal children diagnosed with either autism or ADHD without autism, stronger resting-state coupling between the left middle frontal gyrus and posterior cingulate cortex tracked clinician-rated autism severity across both diagnoses, while ADHD symptom ratings showed no comparable brain-wide signal. Key Findings 166 low-motion …

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Digital Avatar Faces Appear Believable When Eyes Match Emotions

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Digital Faces Looked More Believable When Their Eyes Matched the Emotion

Digital Faces Looked More Believable When Their Eyes Matched the Emotion TL;DR: A virtual smile or glare looked most believable with direct eye contact, while sadness became more believable when the digital face looked downward. Key Findings Direct gaze boosted approach emotions: Happy and angry avatar expressions looked most authentic when the eyes met the …

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