Cited by 125Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

Parvalbumin-immunoreactive neurons in the hippocampal formation of Alzheimer’s diseased brain

Brady, D.R, Mufson, E.J·1997·Neuroscience

Abstract

The number and topographic distribution of immunocytochemically stained parvalbumin interneurons was determined in the hippocampal formation of control and Alzheimer's diseased brain. In control hippocampus, parvalbumin interneurons were aspiny and pleomorphic, with extensive dendritic arbors. In dentate gyrus, parvalbumin cells, as well as a dense plexus of fibers and puncta, were associated with the granule cell layer. A few cells also occupied the molecular layer. In strata oriens and pyramidale of CA1-CA3 subfields, parvalbumin neurons gave rise to dendrites that extended into adjacent strata. Densely stained puncta and beaded fibers occupied stratum pyramidale, with less dense staining in adjacent strata oriens and radiatum. Virtually no parvalbumin profiles were observed in stratum lacunosum-moleculare or the alveus. Numerous polymorphic parvalbumin neurons and a dense plexus of fibers and puncta characterized the deep layer of the subiculum and the lamina principalis externa of the presubiculum. In Alzheimer's diseased hippocampus, there was an approximate 60% decrease in the number of parvalbumin interneurons in the dentate gyrus/CA4 subfield (P<0.01) and subfields CA1-CA2 (P<0.01). In contrast, parvalbumin neurons did not statistically decline in subfields CA3, subiculum or presubiculum in Alzheimer's diseased brains relative to controls. Concurrent staining with Thioflavin-S histochemistry did not reveal degenerative changes within parvalbumin-stained profiles. These findings reveal that parvalbumin interneurons within specific hippocampal subfields are selectively vulnerable in Alzheimer's disease. This vulnerability may be related to their differential connectivity, e.g., those regions connectionally related to the cerebral cortex (dentate gyrus and CA1) are more vulnerable than those regions connectionally related to subcortical loci (subiculum and presubiculum).

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Crossref · 10.1016/s0306-4522(97)00068-7

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  • In the hippocampus of AD patients, a ~60% decrease of PV-positive interneurons has been detected in the dentate gyrus and CA1-CA2 subfields.

    “In the hippocampus of AD patients, a ~60% decrease of PV-positive interneurons has been detected in the dentate gyrus and CA1–CA2 subfields [118]”

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Authors
Brady, D. R., & Mufson, E. J.
Affiliations
  • National Institutes of Health (US)
  • Rush University Medical Center (US)
Corresponding author
Brady, D.R
Venue
Neuroscience
Publisher
Elsevier BV
Published
1997-08
Volume
80
Issue
4
Pages
1113-1125
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2082796074
Cited by
125
References
44
Citations by year
2026: 3 · 2025: 6 · 2024: 8 · 2023: 7 · 2022: 9 · 2021: 8 · 2020: 16 · 2019: 8 · 2018: 6 · 2017: 5 · 2016: 6 · 2015: 2 · 2014: 3 · 2013: 4 · 2012: 3
FWCI
1.43
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (7r01ns026146-04, 5r01ag011482-03)
  • National Institute on Aging (AG 11482, AG10688)
  • National Institute of Neurological Disorders and Stroke (NS 26146)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
parvalbumin, interneurons, Alzheimer's disease, hippocampal formation, dentate gyrus, subiculum, presubiculum, neuronal vulnerability, topographic distribution, dendritic branching, thioflavin S staining, neuronal connectivity
MeSH terms
Adult, Aged, Aged, 80 and over, Alzheimer Disease, Female, Hippocampus, Humans, Immunohistochemistry, Male, Middle Aged, Nerve Fibers, Neurons, Parvalbumins, Reference Values, Pyramidal Cells, Dentate Gyrus

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