Cerebrospinal fluid proteome alterations related to depressive symptoms in cognitive decline and Alzheimer's disease

This is the first study to investigate cerebrospinal fluid proteome alterations associated with depressive symptoms in the context of cognitive decline and Alzheimer's disease (AD). Dysregulated proteins in patients with higher depression scores were related to pathways linked to cell adhesion/inflammation, synaptic signaling, and neurogenesis, as well as cholesterol metabolism in amyloid-positive individuals. The identified proteome alterations may represent shared biological mechanisms involved in both AD and depression in older people.