A fading sense of smell may be one of the earliest warning signs of Alzheimer’s disease—appearing years before memory loss or cognitive decline. New research from DZNE and Ludwig-Maximilians-Universität München (LMU), published in Nature Communications, suggests that changes in the brain’s immune system may be to blame. The study, based on both animal and human data, highlights how immune cells called microglia mistakenly attack nerve fibers crucial for odor perception. For details log on to
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