Cited by 45Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsNeural dynamics and brain function

Subpopulations of neurons expressing parvalbumin in the human amygdala

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Pantazopoulos, Harry, Lange, Nicholas, Hassinger, Linda, Berretta, Sabina·2006·Journal of Comparative Neurology

Abstract

Amygdalar intrinsic inhibitory networks comprise several subpopulations of γ‐aminobutyric acidergic neurons, each characterized by distinct morphological features and clusters of functionally relevant neurochemical markers. In rodents, the calcium‐binding proteins parvalbumin (PVB) and calbindin D28k (CB) are coexpressed in large subpopulations of amygdalar interneurons. PVB‐immunoreactive (‐IR) neurons have also been shown to be ensheathed by perineuronal nets (PNN), extracellular matrix envelopes believed to affect ionic homeostasis and synaptic plasticity. We tested the hypothesis that differential expression of these three markers may define distinct neuronal subpopulations within the human amygdala. Toward this end, triple‐fluorescent labeling using antisera raised against PVB and CB as well as biotinylated Wisteria floribunda lectin for detection of PNN was combined with confocal microscopy. Among the 1,779 PVB‐IR neurons counted, 18% also expressed CB, 31% were ensheathed in PNN, and 7% expressed both CB and PNN. Forty‐four percent of PVB‐IR neurons did not colocalize with either CB or PNN. The distribution of each of these neuronal subgroups showed substantial rostrocaudal gradients. Furthermore, distinct morphological features were found to characterize each neuronal subgroup. In particular, significant differences relative to the distribution and morphology were detected between PVB‐IR neurons expressing CB and PVB‐IR neurons wrapped in PNNs. These results indicate that amygdalar PVB‐IR neurons can be subdivided into at least four different subgroups, each characterized by a specific neurochemical profile, morphological characteristics, and three‐dimensional distribution. Such properties suggest that each of these neuronal subpopulations may play a specific role within the intrinsic circuitry of the amygdala. J. Comp. Neurol. 496:706–722, 2006. © 2006 Wiley‐Liss, Inc.

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Research works printed but not linked: 5

  1. Gloor P, 1986, The limbic system, 159
  2. Gloor P, 1997, The amygdaloid system. The temporal lobe and limbic system, 591
  3. Halgren E, 1992, The amygdala, 191
  4. LeDoux JE, 1992, The amygdala, 339
  5. Mai JK, 1997, Atlas of the human brain

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Authors
Pantazopoulos, H., Lange, N., Hassinger, L., & Berretta, S.
Affiliations
  • McLean Hospital (US)
  • Harvard University (US)
Corresponding author
Berretta, Sabina
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2006-04-13
Volume
496
Issue
5
Pages
706-722
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2126356976
Cited by
45
References
88
Citations by year
2026: 3 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 2 · 2021: 3 · 2020: 3 · 2019: 1 · 2018: 5 · 2017: 4 · 2016: 3 · 2015: 7
FWCI
0.51
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Adobe Systems
  • National Institute of Mental Health (R01MH066280, MH 066280, R01MH066955)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
parvalbumin, calbindin-D28k, human amygdala, perineuronal nets, GABAergic interneurons, neuronal subpopulations, calcium-binding proteins, rostrocaudal gradient, neuronal morphology
MeSH terms
Adult, Amygdala, Female, Humans, Immunohistochemistry, Male, Middle Aged, Neurons, Parvalbumins, Microscopy, Confocal, Calbindins, S100 Calcium Binding Protein G, Calbindin 1

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