Parvalbumin-immunoreactive neurons in the neocortex are resistant to degeneration in Alzheimer's disease

Recent studies have stressed the fact that specific neuronal subtypes may display a differential sensitivity to degeneration in Alzheimer's disease. For example, large pyramidal neurons have been shown to be vulnerable, whereas smaller neurons are resistant to pathology. Using a monoclonal anti...

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Published inJournal of neuropathology and experimental neurology Vol. 50; no. 4; pp. 451 - 462
Main Authors HOF, P. R, COX, K, YOUNG, W. G, CELIO, M. R, ROGERS, J, MORRISON, J. H
Format Journal Article
LanguageEnglish
Published Hagerstown, MD Lippincott Williams & Wilkins 1991
Subjects
Aged
Aged, 80 and over
Alzheimer Disease - metabolism
Alzheimer Disease - pathology
Biological and medical sciences
Brain - metabolism
Brain - pathology
Humans
Medical sciences
Neurons - pathology
Parvalbumins - metabolism
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Human
Resistance
Cerebral cortex
Neuron
Pathophysiology
Alzheimer disease
Degeneration
Psychiatry
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Summary:Recent studies have stressed the fact that specific neuronal subtypes may display a differential sensitivity to degeneration in Alzheimer's disease. For example, large pyramidal neurons have been shown to be vulnerable, whereas smaller neurons are resistant to pathology. Using a monoclonal antibody against the calcium-binding protein parvalbumin, we investigated the possible changes in a subpopulation of interneurons in two cortical areas known to be strongly damaged in Alzheimer's disease. In the prefrontal cortex as well as in the inferior temporal cortex, we observed no differences in parvalbumin-immunoreactive cell counts or cell size in Alzheimer's disease brains as compared to control cases. Moreover, the general cellular morphology of these neurons was preserved in the Alzheimer's disease cases, in that their perikarya and dendritic arborizations were intact. These results suggest that paravalbumin-immunoreactive cells represent a neuronal subset resistant to degeneration, and further support the hypothesis that the pathological process in Alzheimer's disease involves specific neuronal subtypes with particular morphological and molecular characteristics.
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ISSN:0022-3069
1554-6578
DOI:10.1097/00005072-199107000-00006