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Defining biological subtypes may refine diagnosis and treatment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS<\/jats:title>\n                    <jats:p>We analyzed cerebrospinal fluid (CSF) proteomics and longitudinal data from 550 participants in the Alzheimer's Disease Neuroimaging Initiative with up to 16.5 years of follow\u2010up. We profiled 6361 proteins, applied machine learning to identify biological subtypes, and validated them in three independent cohorts.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>Three AD subtypes were identified. Subtype 1, enriched in RNA metabolism pathways, showed the mildest atrophy and slowest cognitive decline. Subtype 2, characterized by axonogenesis\u2010related pathways, exhibited the greatest CSF tau elevations, moderate atrophy, and intermediate decline. Subtype 3, associated with catabolic processes, showed the most severe atrophy and fastest progression. These patterns were consistently replicated across validation cohorts.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>DISCUSSION<\/jats:title>\n                    <jats:p>These findings demonstrate robust, biologically distinct AD subtypes linked to divergent molecular pathways, clinical features, and progression rates. Such refined stratification supports precision diagnostics and targeted therapeutic strategies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/alz.71106","type":"journal-article","created":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T18:24:49Z","timestamp":1770402289000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Proteomics reveals three molecular subtypes of Alzheimer's disease with distinct progression patterns"],"prefix":"10.1002","volume":"22","author":[{"given":"Xiao\u2010He","family":"Hou","sequence":"first","affiliation":[{"name":"Department of Neurology Qingdao Municipal Hospital University of Health and Rehabilitation Sciences  Qingdao China"},{"name":"Institute of Science and Technology for Brain\u2010Inspired Intelligence, Department of Neurology, Huashan Hospital Fudan University  Shanghai China"},{"name":"State Key Laboratory of Brain Function and Disorders and MOE Frontiers 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