Cited by 1,412Mitochondrial Function and PathologyCardiac Ischemia and ReperfusionCell death mechanisms and regulation

Reactive Oxygen Species (Ros-Induced) Ros Release

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Zorov, Dmitry B., Filburn, Charles R., Klotz, Lars-Oliver, Zweier, Jay L., Sollott, Steven J.·2000·The Journal of Experimental Medicine

Abstract

We sought to understand the relationship between reactive oxygen species (ROS) and the mitochondrial permeability transition (MPT) in cardiac myocytes based on the observation of increased ROS production at sites of spontaneously deenergized mitochondria. We devised a new model enabling incremental ROS accumulation in individual mitochondria in isolated cardiac myocytes via photoactivation of tetramethylrhodamine derivatives, which also served to report the mitochondrial transmembrane potential, ΔΨ. This ROS accumulation reproducibly triggered abrupt (and sometimes reversible) mitochondrial depolarization. This phenomenon was ascribed to MPT induction because (a) bongkrekic acid prevented it and (b) mitochondria became permeable for calcein (∼620 daltons) concurrently with depolarization. These photodynamically produced “triggering” ROS caused the MPT induction, as the ROS scavenger Trolox prevented it. The time required for triggering ROS to induce the MPT was dependent on intrinsic cellular ROS-scavenging redox mechanisms, particularly glutathione. MPT induction caused by triggering ROS coincided with a burst of mitochondrial ROS generation, as measured by dichlorofluorescein fluorescence, which we have termed mitochondrial “ROS-induced ROS release” (RIRR). This MPT induction/RIRR phenomenon in cardiac myocytes often occurred synchronously and reversibly among long chains of adjacent mitochondria demonstrating apparent cooperativity. The observed link between MPT and RIRR could be a fundamental phenomenon in mitochondrial and cell biology.

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Crossref · 10.1084/jem.192.7.1001

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  • High levels of ROS may damage mitochondria, leading to opening of mitochondrial pores and loss of membrane polarization.

    “High levels of ROS may damage mitochondria, leading to the opening of mitochondrial pores and allowing the influx of protons and ions, which leads to a loss of membrane polarization (13, 52).”
  • An oxidant burst in one mitochondrion can spread oxidant production throughout the mitochondrial network via transient MPT pore formation, waves of reduction in mitochondrial potential, and propagation of oxidant bursts, at least in cardiomyocytes.

    “An oxidant burst in one mitochondrion may also serve to spread oxidant production throughout the mitochondrial network in a manner that involves transient MPT pore formation, waves of reduction in mitochondrial potential, and propagation of oxidant bursts, at least in cardiomyocytes (48, 481).”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [481]

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Authors
Zorov, D. B., Filburn, C. R., Klotz, L.-O., Zweier, J. L., & Sollott, S. J.
Affiliations
  • National Institutes of Health (US)
  • Johns Hopkins University (US)
Venue
The Journal of Experimental Medicine
Published
2000-10-02
Volume
192
Issue
7
Pages
1001-1014
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2135314348
Cited by
1,412
References
48
Citations by year
2026: 34 · 2025: 40 · 2024: 62 · 2023: 71 · 2022: 69 · 2021: 82 · 2020: 71 · 2019: 56 · 2018: 67 · 2017: 70 · 2016: 78 · 2015: 65 · 2014: 68 · 2013: 67 · 2012: 70
FWCI
5.31
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (HL-38324, R01HL063744, HL52315, P50HL052315, HL 63744, R01HL038324)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
reactive oxygen species, mitochondrial permeability transition, cardiomyocytes, mitochondrial depolarization, mitochondrial membrane potential, bongkrekic acid, glutathione, mitochondrial ROS generation
MeSH terms
Animals, Calcium, Cells, Cultured, Fluorescent Dyes, Heart, Mitochondria, Heart, Myocardium, Oxidation-Reduction, Permeability, Proteins, Solubility, Sulfhydryl Compounds, Reactive Oxygen Species, Rats

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