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Liver exerkine reverses aging- and Alzheimer's-related memory loss via vasculature

2 months 1 week ago
Blood factors transfer the benefits of exercise to the aged brain independent of physical activity. Here, we show that the liver-derived exercise factor (exerkine) glycosylphosphatidylinositol (GPI)-specific phospholipase D1 (GPLD1), a GPI-degrading enzyme, reverses aging- and Alzheimer's-related memory loss by targeting the brain vasculature. GPLD1 has the potential to cleave over 100 putative GPI-anchored proteins, necessitating the identification of downstream targets that mediate cognitive...
Gregor Bieri

Brain-wide mapping of oligodendrocyte organization, oligodendrogenesis, and myelin injury

2 months 1 week ago
Insulating sheaths of myelin accelerate neuronal communication in the mammalian brain. Oligodendrocytes that produce myelin are generated throughout life to gradually increase myelin coverage, but these dynamics have not been defined brain-wide across the lifespan. We developed a cellular mapping pipeline involving tissue clearing, lightsheet microscopy, and AI-assisted analysis to identify the precise location of millions of oligodendrocytes and assess regional myelin density in the mouse...
Yu Kang T Xu

Vulnerability of short-term memory in a mouse model of Alzheimer's disease

2 months 1 week ago
Interference from distracting stimuli renders short-term memory vulnerable. While behavioral evidence suggests short-term memory deficits in Alzheimer's disease (AD), the underlying neural mechanisms remain poorly understood. Using a mouse model of AD (APP-KI), we identified increased susceptibility of short-term memory to sensory perturbations. Simultaneous two-photon calcium imaging across eight cortical regions during a delayed-response task showed that distractors disrupted neural...
Chunyue Li