Shock, volume 39, issue 6, pages 543

Mitotracker probes and mitochondrial membrane potential

Kholmukhamedov Andaleb
Schwartz Justin M.
Lemasters John J.
Publication typeJournal Article
Publication date2013-05-17
Journal: Shock
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor3.1
ISSN10732322, 15400514
Critical Care and Intensive Care Medicine
Emergency Medicine
Abstract
In the recent article by Lin et al. (1), the authors demonstrate protective effects of splenic infusion of isolated mitochondria against hepatic ischemia/reperfusion injury in a rat model. One of their conclusions is that the isolated mitochondria from donor animals maintained an intact membrane potential in the livers of recipient animals even at 4 hours after infusion, as assessed by Mito-Tracker Orange CMTMRos staining. Cationic fluorophores like rhodamine 123 and tetramethylrhodamine methylester (TMRM) are readily sequestered in the matrix space of polarized mitochondria, and these probes are released once mitochondria experience a loss in membrane potential. MitoTracker dyes are also cationic fluorophores that accumulate electrophoretically into mitochondria in response to the highly negative mitochondrial membrane potential. However, unlike TMRM and rhodamine 123, MitoTracker dyes possess a reactive chloromethyl group that forms a covalent bond with thiols on proteins and peptides, which traps MitoTracker dyes within mitochondria. Thus, mitochondria retain MitoTracker dyes like MitoTracker Orange CMTMRos after loss of their membrane potential (2;3). Hence, retention of MitoTracker staining does not signify that infused mitochondria remain polarized, as was concluded in (1). Indeed, high serum free Ca2+ concentration, which is 10,000 times greater than cytosolic free Ca2+, will lead quickly to mitochondrial Ca2+ overload, respiratory inhibition and mitochondrial dysfunction from onset of the mitochondrial permeability transition with loss of the mitochondrial membrane potential (4;5).

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Kholmukhamedov A., Schwartz J. M., Lemasters J. J. Mitotracker probes and mitochondrial membrane potential // Shock. 2013. Vol. 39. No. 6. p. 543.
GOST all authors (up to 50) Copy
Kholmukhamedov A., Schwartz J. M., Lemasters J. J. Mitotracker probes and mitochondrial membrane potential // Shock. 2013. Vol. 39. No. 6. p. 543.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1097/SHK.0b013e318292300d
UR - https://doi.org/10.1097%2FSHK.0b013e318292300d
TI - Mitotracker probes and mitochondrial membrane potential
T2 - Shock
AU - Kholmukhamedov, Andaleb
AU - Schwartz, Justin M.
AU - Lemasters, John J.
PY - 2013
DA - 2013/05/17 00:00:00
PB - Wolters Kluwer Health
SP - 543
IS - 6
VL - 39
PMID - 23680774
SN - 1073-2322
SN - 1540-0514
ER -
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BibTex Copy
@article{2013_Kholmukhamedov,
author = {Andaleb Kholmukhamedov and Justin M. Schwartz and John J. Lemasters},
title = {Mitotracker probes and mitochondrial membrane potential},
journal = {Shock},
year = {2013},
volume = {39},
publisher = {Wolters Kluwer Health},
month = {may},
url = {https://doi.org/10.1097%2FSHK.0b013e318292300d},
number = {6},
pages = {543},
doi = {10.1097/SHK.0b013e318292300d}
}
MLA
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MLA Copy
Kholmukhamedov, Andaleb, et al. “Mitotracker probes and mitochondrial membrane potential.” Shock, vol. 39, no. 6, May. 2013, p. 543. https://doi.org/10.1097%2FSHK.0b013e318292300d.
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