Endothelin-1-like immunoreactivity in cerebral cortex of Alzheimer-type dementia.

1. Endothelin-1-like immunoreactivity (ET-1-LI) in cerebral cortex in postmortem brains obtained from patients with Alzheimer-type dementia (ATD) was measured by enzyme-immunoassay. 2. The ET-1-LI in the ATD brains was significantly increased in frontal and occipital cortex than those in the control brains and a significant correlation was found between frontal and temporal lobe of ATD brains. 3. These findings may explain the clinico-radiological results that the cerebral blood flow is decreased in ATD patients, the mechanism of which is still unknown.