Unprecedented study of brain immune cells reveals new clues to Alzheimer's disease progression

The brain's immune cells are increasingly recognized as key players in Alzheimer's disease, but exactly how they change as the disease develops has remained unclear. A new study published in Nature Genetics [DOI: https://10.1038/s41588-026-02716-6] provides the most comprehensive map to date of these cells, identifying a protective subtype of brain immune cell that expands as Alzheimer's disease progresses and uncovering the molecular pathway that enables these cells to help defend the brain.

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