Autoantibodies to beta-amyloid and neurotransmitters in patients with Alzheimer's disease and senile dementia of the Alzheimer type.

The content of autoantibodies to beta-amyloid protein Abeta(1-42), its neurotoxic fragment Abeta(25-35), and neurotransmitters were studied in the blood of patients with presenile Alzheimer's disease and senile dementia of the Alzheimer type. Significant differences in the relative content of autoantibodies to Abeta(1-42)and autoantibodies to biogenic amines were demonstrated. These results can be used for the development of a biochemical method for differential diagnosis of Alzheimer dementias.