It is intended to provide a diagnostic agent and a diagnostic method for sporadic Alzheimer's disease by detecting a metabolic change of a glycoprotein having a2,6-sialate residue in the blood. It is also intended to provide a diagnostic agent for Alzheimer's disease which comprises lectin for detecting an a2,6-sialate-containing glycoprotein.
METHOD OF DIAGNOSING ALZHEIMER'S DISEASE USING SERUM GLYCOPROTEIN AS BIOMARKER