Cited by 263Neuroscience and Neuropharmacology ResearchMitochondrial Function and PathologyCellular transport and secretion

Motile axonal mitochondria contribute to the variability of presynaptic strength

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Sun, Tao, Qiao, Haifa, Pan, Ping-Yue, Chen, Yanmin, Sheng, Zu-Hang·2013·Cell Reports

Abstract

One of the most notable characteristics of synaptic transmission is the wide variation in synaptic strength in response to identical stimulation. In hippocampal neurons, approximately one-third of axonal mitochondria are highly motile, and some dynamically pass through presynaptic boutons. This raises a fundamental question: can motile mitochondria contribute to the pulse-to-pulse variability of presynaptic strength? Recently, we identified syntaphilin as an axonal mitochondrial-docking protein. Using hippocampal neurons and slices of syntaphilin knockout mice, we demonstrate that the motility of axonal mitochondria correlates with presynaptic variability. Enhancing mitochondrial motility increases the pulse-to-pulse variability, whereas immobilizing mitochondria reduces the variability. By dual-color live imaging at single-bouton levels, we further show that motile mitochondria passing through boutons dynamically influence synaptic vesicle release, mainly by altering ATP homeostasis in axons. Thus, our study provides insight into the fundamental properties of the CNS to ensure the plasticity and reliability of synaptic transmission.

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Crossref · 10.1016/j.celrep.2013.06.040

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  • Movement of mitochondria into the vicinity of synaptic sites affects both ATP levels and synaptic vesicle fusion in response to trains of stimulation.

    “movement of mitochondria into the vicinity of synaptic sites has been demonstrated to affect both ATP levels and synaptic vesicle fusion in response to trains of stimulation (Sun et al., 2013).”

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Authors
Sun, T., Qiao, H., Pan, P.-Y., Chen, Y., & Sheng, Z.-H.
Affiliations
National Institutes of Health (US)
Corresponding author
Sheng, Zu-Hang
Venue
Cell Reports
Publisher
Elsevier BV
Published
2013-08
Volume
4
Issue
3
Pages
413-419
ISSN
2211-1247 (ISSN-L)
OpenAlex
W1971596020
Cited by
263
References
32
Citations by year
2026: 14 · 2025: 18 · 2024: 28 · 2023: 21 · 2022: 20 · 2021: 34 · 2020: 24 · 2019: 14 · 2018: 19 · 2017: 9 · 2016: 29 · 2015: 18 · 2014: 12 · 2013: 3
FWCI
10.13
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (ZIANS003029)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
axonal mitochondria, mitochondrial motility, synaptic transmission, syntaphilin, synaptic vesicle release, ATP homeostasis, hippocampal neurons, synaptic plasticity, presynaptic terminals
MeSH terms
Adenosine Triphosphate, Animals, Axons, Axonal Transport, Hippocampus, Mitochondria, Synaptic Transmission, Neurons, Presynaptic Terminals, Mice

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