A Cedars-Sinai team generated youthful mononuclear phagocytes from human induced pluripotent stem cells and infused them into aging mice and Alzheimer’s models, yielding dramatic reversals: improved memory performance, restored mossy cells in the hippocampus (key for learning), and rejuvenated microglia that efficiently cleared brain debris without inflammation. Unlike direct neuron replacement, these immune cells appear to exert protective effects indirectly—possibly via anti-aging blood signals—enhancing overall neural health and reducing amyloid buildup. The study, spanning multiple mouse strains, highlights the untapped potential of regenerative immunology for human trials, offering hope for halting or reversing cognitive decline in neurodegenerative diseases like Alzheimer’s, which affects millions worldwide. No adverse effects were noted, and human applicability is a key next step. Read the full article
https://www.sciencedaily.com/releases/2025/10/251023031631.htm
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