Cited by 111Neuroscience and Neuropharmacology ResearchCellular transport and secretionNeural dynamics and brain function

Human pyramidal to interneuron synapses are mediated by multi-vesicular release and multiple docked vesicles

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Molnár, Gábor, Rózsa, Márton, Baka, Judith, Holderith, Noémi, Barzó, Pál, Nusser, Zoltan, Tamás, Gábor·2016·eLife

Abstract

Classic theories link cognitive abilities to synaptic properties and human-specific biophysical features of synapses might contribute to the unparalleled performance of the human cerebral cortex. Paired recordings and multiple probability fluctuation analysis revealed similar quantal sizes, but 4-times more functional release sites in human pyramidal cell to fast-spiking interneuron connections compared to rats. These connections were mediated on average by three synaptic contacts in both species. Each presynaptic active zone (AZ) contains 6.2 release sites in human, but only 1.6 in rats. Electron microscopy (EM) and EM tomography showed that an AZ harbors 4 docked vesicles in human, but only a single one in rats. Consequently, a Katz’s functional release site occupies ~0.012 μm2 in the human presynaptic AZ and ~0.025 μm2 in the rat. Our results reveal a robust difference in the biophysical properties of a well-defined synaptic connection of the cortical microcircuit of human and rodents.

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Authors
Molnár, G., Rózsa, M., Baka, J., Holderith, N., Barzó, P., Nusser, Z., & Tamás, G.
Affiliations
  • University of Szeged (HU)
  • HUN-REN Institute of Experimental Medicine (HU)
  • Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
Corresponding author
Tamás, Gábor
Venue
eLife
Published
2016-08-18
Volume
5
ISSN
2050-084X (ISSN-L)
OpenAlex
W2513955126
Cited by
111
References
45
Citations by year
2026: 11 · 2025: 17 · 2024: 14 · 2023: 14 · 2022: 10 · 2021: 10 · 2020: 10 · 2019: 7 · 2018: 10 · 2017: 6 · 2016: 2
FWCI
4.69
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • SZTE Publicatio Repozitórium (University of Szeged) (acceptedVersion, other-oa)
  • Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • European Research Council (INTERIMPACT, 293681)
  • Magyar Tudományos Akadémia (MTA-SZTE Agykergi Neuronhalozatok Kutatocsoport, Lendület, LP2012-29, Janos Bolyai Scholarship)
  • Nemzeti Kutatási és Technológiai Hivatal (VKSZ_14-1-2015-0155)
  • Nemzeti Agykutatasi Program (NAP-A)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
fast-spiking interneurons, docked vesicles, active zone, release sites, quantal size, paired recordings, cortical microcircuits
MeSH terms
Animals, Humans, Interneurons, Synaptic Vesicles, Presynaptic Terminals, Pyramidal Cells, Microscopy, Electron, Transmission, Rats, Electron Microscope Tomography, Biophysical Phenomena

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