The DOI matches its Crossref record; 51 of the 51 references it cites were found in a registry or an index.
Mitochondria are morphologically and functionally heterogeneous within cells
Open accessAbstract
We investigated whether mitochondria represent morphologically continuous and functionally homogenous entities within single intact cells. Physical continuity of mitochondria was determined by three-dimensional reconstruction of fluorescence from mitochondrially targeted DsRed1 or calcein. The mitochondria of HeLa, PAEC, COS-7, HUVEC, hepatocytes, cortical astrocytes and neuronal cells all displayed heterogeneous distributions and were of varying sizes. There was a denser aggregation of mitochondria in perinuclear positions than in the cell periphery, where individual isolated mitochondria could be seen clearly. Using fluorescence-recovery after photobleaching, we observed that DsRed1 and calcein were highly mobile within the matrix of individual mitochondria, and that mitochondria within a cell were not lumenally continuous. Mitochondria were not electrically coupled, since only individual mitochondria were observed to depolarize following irradiation of TMRE-loaded cells. Functional heterogeneity of mitochondria in single cells was observed with respect to membrane potential, sequestration of hormonally evoked cytosolic calcium signals and timing of permeability transition pore opening in response to tert-butyl hydroperoxide. Our data indicate that mitochondria within individual cells are morphologically heterogeneous and unconnected, allowing them to have distinct functional properties.
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Cites
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Cited by
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Mitochondrial fusion and fission in cell life and death
Westermann, B. (2010) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm3013 · Cited by 2,002
The cell biology of mitochondrial membrane dynamics
Giacomello, M., Pyakurel, A., Glytsou, C., & Scorrano, L. (2020) · Nature Reviews Molecular Cell Biology · doi:10.1038/s41580-020-0210-7 · Cited by 1,550
Csordás, G., Renken, C., Várnai, P., Walter, L., Weaver, D., Buttle, K. F., Balla, T., Mannella, C. A., & Hajnóczky, G. (2006) · The Journal of Cell Biology · doi:10.1083/jcb.200604016 · Cited by 1,373
OPA1 requires mitofusin 1 to promote mitochondrial fusion
Cipolat, S., de Brito, O. M., Dal Zilio, B., & Scorrano, L. (2004) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0407043101 · Cited by 1,300
Metadata
- Authors
- Collins, T. J.
- Venue
- The EMBO Journal
- Published
- 2002-04-01
- Volume
- 21
- Issue
- 7
- Pages
- 1616-1627
- ISSN
- 0261-4189 (ISSN-L)
- 1460-2075
- OpenAlex
- W2124872060
- Cited by
- 592
- References
- 51
- FWCI
- 12.53
- Type
- journal article
- Language
- en
- Open access
- hybrid
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
