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0This research demonstrates that Alzheimer's disease (AD) is linked to an increased presence of somatic cancer driver variants within the brain's immune landscape. Specifically, these genetic mutations are enriched in microglia-like brain macrophages (MLBMs), driving them toward harmful pro-inflammatory and proliferative states that mirror disease-associated signatures. Evidence suggests these mutant cells may originate from blood-derived monocytes that infiltrate the brain due to age-related barrier degradation. By utilizing single-cell multi-omic analyses and iPSC-derived models, the authors show that these driver mutations autonomously trigger the transition of microglia from a protective to a neurotoxic state. Consequently, the study identifies clonal hematopoiesis as a significant, independent genetic factor that may accelerate neurodegeneration. This discovery highlights potential new therapeutic avenues using existing oncology drugs to suppress overactive, mutated immune cells in the brain.
References:
Huang A Y, Zhou Z, Talukdar M, et al. Somatic cancer variants enriched in Alzheimer’s disease microglia-like cells drive inflammatory and proliferative states[J]. Cell, 2026.
