Cited by 86Mitochondrial Function and PathologyAutophagy in Disease and TherapyCell death mechanisms and regulation

Manipulation of Mitochondria Dynamics Reveals Separate Roles for Form and Function in Mitochondria Distribution

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Trevisan, Tatiana, Pendin, Diana, Montagna, Aldo, Bova, Sergio, Ghelli, Anna Maria, Daga, Andrea·2018·Cell Reports

Abstract

Mitochondria shape is controlled by membrane fusion and fission mediated by mitofusins, Opa1, and Drp1, whereas mitochondrial motility relies on microtubule motors. These processes govern mitochondria subcellular distribution, whose defects are emphasized in neurons because of their polarized structure. We have studied how perturbation of the fusion/fission balance affects mitochondria distribution in Drosophila axons. Knockdown of Marf or Opa1 resulted in progressive loss of distal mitochondria and in a distinct oxidative phosphorylation and membrane potential deficit. Downregulation of Drp1 rescued the lethality and bioenergetic defect caused by neuronal Marf RNAi, but induced only a modest restoration of axonal mitochondria distribution. Surprisingly, Drp1 knockdown rescued fragmentation and fully restored aberrant distribution of axonal mitochondria produced by Opa1 RNAi; however, Drp1 knockdown did not improve viability or mitochondria function. Our data show that proper morphology is critical for proper axonal mitochondria distribution independent of bioenergetic efficiency. The health of neurons largely depends on mitochondria function, but does not depend on shape or distribution.

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Crossref · 10.1016/j.celrep.2018.04.017

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  • Similar changes in mitochondrial ultrastructure were observed in a recent study investigating acute downregulation of both Opa1 and Drp1 in Drosophila adult muscles.

    “Similar changes were observed in a recent study that investigated the acute downregulation of both Opa1 and Drp1 in Drosophila adult muscles [33].”

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Authors
Trevisan, T., Pendin, D., Montagna, A., Bova, S., Ghelli, A. M., & Daga, A.
Affiliations
  • IRCCS Eugenio Medea (IT)
  • University of Padua (IT)
  • University of Bologna (IT)
Corresponding author
Daga, Andrea
Venue
Cell Reports
Publisher
Elsevier BV
Published
2018-05
Volume
23
Issue
6
Pages
1742-1753
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2799755002
Cited by
86
References
35
Citations by year
2026: 9 · 2025: 6 · 2024: 9 · 2023: 5 · 2022: 13 · 2021: 15 · 2020: 12 · 2019: 16 · 2018: 1
FWCI
3.89
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by-nc-nd)
Funders
  • Italian Ministry of Health (Starting Grant 2015)
  • Cariparo Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
mitochondrial dynamics, mitochondrial fusion, mitochondrial fission, mitochondrial motility, Marf, OPA1, Drp1, mitofusins, neuronal polarity, oxidative phosphorylation, mitochondrial membrane potential, Drosophila neurons, mitochondrial morphology
MeSH terms
Animals, Axons, Drosophila melanogaster, Larva, Mitochondria, Muscles, Neuromuscular Junction, Phenotype, Membrane Potential, Mitochondrial, Mitochondrial Dynamics

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