title: Somatostatin immunoreactivity is reduced in Parkinson's disease dementia with Alzheimer's changes.
abstract: Somatostatin-like immunoreactivity (SLI) was measured in postmortem brain tissue from 15 control patients, 7 non-demented parkinsonian patients and 7 demented parkinsonian patients who had Alzheimer-type cortical pathology. The non-demented parkinsonian patients had normal concentrations of SLI in the cerebral cortex, hippocampus, amygdala, putamen, caudate or globus pallidus. Demented parkinsonian patients with Alzheimer-type cortical pathology had significantly reduced (approximately 40%) levels of SLI in both the frontal (Brodmann area 6) and temporal (Brodmann area 21) cortex. These findings suggest that parkinsonian dementia with Alzheimer-type pathology like Alzheimer's disease itself, is associated with reduced concentrations of cortical somatostatin.
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000209:etiology / Q000378:metabolism*; D002540:Cerebral Cortex / Q000378:metabolism* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications / Q000378:metabolism*; D010455:Peptides / Q000378:metabolism*
chemical_list: D010455:Peptides; C029993:somatostatin-like peptides