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pubmed-article:21406203pubmed:abstractTextMitochondria play central roles in cell life as a source of energy and in cell death by inducing apoptosis. Many important functions of mitochondria change in cancer, and these organelles can be a target of chemotherapy. The widely used anticancer drug doxorubicin (DOX) causes cell death, inhibition of cell cycle/proliferation and mitochondrial impairment. However, the mechanism of such impairment is not completely understood. In our study we used confocal and two-photon fluorescence imaging together with enzymatic and respirometric analysis to study short- and long-term effects of doxorubicin on mitochondria in various human carcinoma cells. We show that short-term (<30 min) effects include i) rapid changes in mitochondrial redox potentials towards a more oxidized state (flavoproteins and NADH), ii) mitochondrial depolarization, iii) elevated matrix calcium levels, and iv) mitochondrial ROS production, demonstrating a complex pattern of mitochondrial alterations. Significant inhibition of mitochondrial endogenous and uncoupled respiration, ATP depletion and changes in the activities of marker enzymes were observed after 48 h of DOX treatment (long-term effects) associated with cell cycle arrest and death.lld:pubmed
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pubmed-article:21406203pubmed:authorpubmed-author:GrimmMichaelMlld:pubmed
pubmed-article:21406203pubmed:authorpubmed-author:MargreiterRai...lld:pubmed
pubmed-article:21406203pubmed:authorpubmed-author:SaksValdurVlld:pubmed
pubmed-article:21406203pubmed:authorpubmed-author:KuznetsovAndr...lld:pubmed
pubmed-article:21406203pubmed:authorpubmed-author:AmbergerAlber...lld:pubmed
pubmed-article:21406203pubmed:copyrightInfoCopyright © 2011 Elsevier B.V. All rights reserved.lld:pubmed
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pubmed-article:21406203pubmed:volume1813lld:pubmed
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pubmed-article:21406203pubmed:pagination1144-52lld:pubmed
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pubmed-article:21406203pubmed:year2011lld:pubmed
pubmed-article:21406203pubmed:articleTitleChanges in mitochondrial redox state, membrane potential and calcium precede mitochondrial dysfunction in doxorubicin-induced cell death.lld:pubmed
pubmed-article:21406203pubmed:affiliationDepartment of Heart Surgery, Innsbruck Medical University, Innrain 66, Innsbruck A-6020, Austria. andrey.kuznetsov@uki.atlld:pubmed
pubmed-article:21406203pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:21406203pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed