Abstract:
:Mitochondria are often regarded as a major source of reactive oxygen species (ROS) in animal cells, with H2O2 being the predominant ROS released from mitochondria; however, it has been recently demonstrated that energized brain mitochondria may act as stabilizers of H2O2 concentration (Starkov et al. [1]) based on the balance between production and the consumption of H2O2, the later of which is a function of [H2O2] and follows first order kinetics. Here we test the hypothesis that isolated skeletal muscle mitochondria, from the rat, are able to modulate [H2O2] based upon the interaction between the production of ROS, as superoxide/H2O2, and the H2O2 decomposition capacity. The compartmentalization of detection systems for H2O2 and the intramitochondrial metabolism of H2O2 leads to spacial separation between these two components of the assay system. This results in an underestimation of rates when relying solely on extramitochondrial H2O2 detection. We find that differentiating between these apparent rates found when using extramitochondrial H2O2 detection and the actual rates of metabolism is important to determining the rate constant for H2O2 consumption by mitochondria in kinetic experiments. Using the high rate of ROS production by mitochondria respiring on succinate, we demonstrate that net H2O2 metabolism by mitochondria can approach a stable steady-state of extramitochondrial [H2O2]. Importantly, the rate constant determined by extrapolation of kinetic experiments is similar to the rate constant determined as the [H2O2] approaches a steady state.
journal_name
Redox Bioljournal_title
Redox biologyauthors
Treberg JR,Munro D,Banh S,Zacharias P,Sotiri Edoi
10.1016/j.redox.2015.05.001subject
Has Abstractpub_date
2015-08-01 00:00:00pages
216-224issn
2213-2317pii
S2213-2317(15)00044-0journal_volume
5pub_type
杂志文章相关文献
Redox Biology文献大全abstract:BACKGROUND:Macrophages regulate the inflammatory response and affect re-endothelialization. Inflammation and macrophages play important roles in promoting tissue repair, but p38α mitogen-activated protein kinase's role in re-endothelialization is unknown. METHODS AND RESULTS:Wire injuries of carotid arteries and Evans...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101775
更新日期:2021-01-01 00:00:00
abstract::A reliable and fast liquid chromatography-tandem mass spectrometry method has been developed for the simultaneous determination of three oxidized nucleic acid damage products in urine, 8-oxoguanine (8-oxoGua), 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo) and 8-oxo-7,8-dihydroguanosine (8-oxoGuo). We applied this me...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2018.11.016
更新日期:2019-01-01 00:00:00
abstract::Compared to other organs, the brain is especially exposed to oxidative stress. In general, brains from young females tend to present lower oxidative damage in comparison to their male counterparts. This has been attributed to higher antioxidant defenses and a better mitochondrial function in females, which has been li...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2020.101505
更新日期:2020-04-01 00:00:00
abstract::Highly active anti-retrovirus therapy (HAART) has been used to block the progression and symptoms of human immunodeficiency virus infection. Although it decreases morbidity and mortality, clinical use of HAART has also been linked to various adverse effects such as severe cardiomyopathy resulting from compromised mito...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2017.06.011
更新日期:2017-10-01 00:00:00
abstract::In the present study, we aimed to investigate the impact of permanent cystathionine-β-Synthase (CBS) gene knockdown in human telomerase reverse transcriptase (hTERT) immortalized human adipose-derived mesenchymal stem cells (ASC52telo) and in their capacity to differentiate into adipocytes. CBS gene KD in ASC52telo ce...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101668
更新日期:2020-08-02 00:00:00
abstract::Hydrogen peroxide appears to be the key reactive oxygen species involved in redox signalling, but comparisons of the low concentrations of hydrogen peroxide that are calculated to exist within cells with those previously shown to activate common signalling events in vitro indicate that direct oxidation of key thiol gr...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2020.101484
更新日期:2020-08-01 00:00:00
abstract:BACKGROUND:Vitamin D status [25(OH)D] has recently been reported to be associated with altered cellular bioenergetic profiles of peripheral blood mononuclear cells (PBMCs). No study has tracked the seasonal variation of 25(OH)D and its putative influence on whole body energy metabolism, cellular bioenergetic profiles, ...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2017.04.009
更新日期:2017-08-01 00:00:00
abstract::The generation of NO by the various NO synthases in normal and malignant tissues is manifested by various biological effects that are involved in the regulation of cell survival, differentiation and cell death. The role of NO in the cytotoxic immune response was first revealed by demonstrating the induction of iNOS in...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2015.08.013
更新日期:2015-12-01 00:00:00
abstract::Gastric cancer is one of the leading causes of cancer-related deaths. Chemotherapy has improved long-term survival of patients with gastric cancer. Unfortunately, cancer readily develops resistance to apoptosis-inducing agents. New mechanisms, inducing caspase-independent paraptosis-like cell death in cancer cells is ...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2018.11.019
更新日期:2019-02-01 00:00:00
abstract::Ultraviolet light is the dominant environmental oxidative skin stressor and a major skin aging factor. We studied which oxidized phospholipid (OxPL) mediators would be generated in primary human keratinocytes (KC) upon exposure to ultraviolet A light (UVA) and investigated the contribution of OxPL to UVA responses. Ma...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2018.11.006
更新日期:2019-01-01 00:00:00
abstract::In recent years, the gasotransmitter hydrogen sulphide (H2S), produced by the transsulphuration pathway, has been recognized as a biological mediator playing an important role under normal conditions and in various pathologies in both eukaryotes and prokaryotes. The transsulphuration pathway (TSP) includes the convers...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101654
更新日期:2020-09-01 00:00:00
abstract::Red blood cells (RBC) have been considered almost exclusively as a transporter of metabolic gases and nutrients for the tissues. It is an accepted dogma that RBCs take up and inactivate endothelium-derived NO via rapid reaction with oxyhemoglobin to form methemoglobin and nitrate, thereby limiting NO available for vas...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2013.12.027
更新日期:2014-01-09 00:00:00
abstract:AIMS:Hyperoxic breathing might lead to redox imbalance and signaling changes that affect cerebral function. Paradoxically, hypoxic breathing is also believed to cause oxidative stress. Our aim is to dissect the cerebral tissue responses to altered O2 fractions in breathed air by assessing the redox imbalance and the re...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2016.10.018
更新日期:2017-04-01 00:00:00
abstract::The notion that oxidative stress plays a role in virtually every human disease and environmental exposure has become ingrained in everyday knowledge. However, mounting evidence regarding the lack of specificity of biomarkers traditionally used as indicators of oxidative stress in human disease and exposures now necess...
journal_title:Redox biology
pub_type: 杂志文章,meta分析
doi:10.1016/j.redox.2017.03.024
更新日期:2017-08-01 00:00:00
abstract::NADPH oxidase 5 (NOX5) is a transmembrane signaling enzyme that produces superoxide in response to elevated cytosolic calcium. In addition to its association with numerous human diseases, NOX5 has recently been discovered to play crucial roles in the immune response and cardiovascular system. Details of NOX5 maturatio...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101656
更新日期:2020-09-01 00:00:00
abstract::The diphthamide modification of translation elongation factor 2 is highly conserved in eukaryotes and archaebacteria. Nevertheless, cells lacking diphthamide can carry out protein synthesis and are viable. We have analyzed the phenotypes of diphthamide deficient cells and found that diphthamide deficiency reduces sele...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2018.09.015
更新日期:2019-01-01 00:00:00
abstract::We previously reported that the highly reactive cell-free heme (CFH) is increased in the plasma of patients with chronic lung injury and causes pulmonary edema in animal model of acute respiratory distress syndrome (ARDS) post inhalation of halogen gas. However, the mechanisms by which CFH causes pulmonary edema are u...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101592
更新日期:2020-09-01 00:00:00
abstract::Premature senescence, a death escaping pathway for cells experiencing stress, is conducive to aging and cardiovascular diseases. The molecular switch between senescent and apoptotic fate remains, however, poorly recognized. Nrf2 is an important transcription factor orchestrating adaptive response to cellular stress. H...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2019.101304
更新日期:2020-01-01 00:00:00
abstract::Retinal tissue receives its supply of oxygen from two sources - the retinal and choroidal circulations. Decreases in retinal blood flow occur in the early stages of diabetes, with the eventual development of hypoxia thought to contribute to pathological neovascularization. Oxygen consumption in the retina has been fou...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2014.04.006
更新日期:2014-04-18 00:00:00
abstract::Artesunate, an anti-malarial drug, has been repurposed as an anticancer drug due to its induction of cell death via reactive oxygen species (ROS) production. However, the molecular mechanisms regulating cancer cell death and the resistance of cells to artesunate remain unclear. We investigated the molecular mechanisms...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2016.12.010
更新日期:2017-04-01 00:00:00
abstract::Oxidative stress has a critical role in the pathogenesis of Age-related Macular Degeneration (AMD), a multifactorial disease that includes age, gene variants of complement regulatory proteins and smoking as the main risk factors. Stress-induced premature cellular senescence (SIPS) is postulated to contribute to this c...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2015.11.011
更新日期:2016-04-01 00:00:00
abstract::Glutathione peroxidase 2 (GPx2) is one of the five selenoprotein GPxs having a selenocysteine in the active center. GPx2 is strongly expressed in the gastrointestinal epithelium, as is another isoform, GPx1, though with a different localization pattern. Both GPxs are redox-active enzymes that are important for the red...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2019.101388
更新日期:2020-01-01 00:00:00
abstract::Manganese superoxide dismutase, encoded by the Sod2 gene, is a ubiquitously expressed mitochondrial antioxidant enzyme that is essential for mammalian life. Mice born with constitutive genetic knockout of Sod2 do not survive the neonatal stage, which renders the longitudinal study of the biochemical and metabolic effe...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2013.01.001
更新日期:2013-02-05 00:00:00
abstract::Williamson and colleagues present important data on the effects of MitoQ - an antioxidant compound targeted to mitochondria - on mtDNA damage following exercise. Future studies are needed to elucidate, whether or not the observed prevention of MitoQ on DNA damage is beneficial with regard to functional outcomes in hea...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101732
更新日期:2021-01-01 00:00:00
abstract::Tumorigenesis is commonly known as a complicated process, in which reactive oxygen species (ROS) plays a critical role to involve in signal transduction, metabolism, cell proliferation and differentiation. Previously, ribosomal protein L10 (RPL10) was suggested to possess extra-ribosomal functions in pancreatic cancer...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2018.08.016
更新日期:2018-10-01 00:00:00
abstract::Cardiovascular disease is the leading cause of the death for both men and women. Although baseline heart physiology and the response to disease are known to differ by sex, little is known about sex differences in baseline molecular signaling, especially with regard to redox biology. In this review, we describe current...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2020.101441
更新日期:2020-04-01 00:00:00
abstract::The massive production and activation of myofibroblasts (MFB) is key to the development of liver fibrosis. In many studies, it has been proven that hepatocytes are an important part of MFB, and can be transformed into MFB through epithelial-mesenchymal transition (EMT) during hepatic fibrogenesis. In our previous stud...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2020.101600
更新日期:2020-09-01 00:00:00
abstract::Yeast Sir2 is an NAD-dependent histone deacetylase related to oxidative stress and aging. In a previous study, we showed that Sir2 is regulated by S-glutathionylation of key cysteine residues located at the catalytic domain. Mutation of these residues results in strains with increased resistance to disulfide stress. I...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2019.101229
更新日期:2019-06-01 00:00:00
abstract::Transcription factors control the rate of transcription of genetic information from DNA to messenger RNA, by binding specific DNA sequences in promoter regions. Transcriptional gene control is a rate-limiting process that is tightly regulated and based on transient environmental signals which are translated into long-...
journal_title:Redox biology
pub_type: 杂志文章,评审
doi:10.1016/j.redox.2019.101104
更新日期:2019-02-01 00:00:00
abstract::Vascular peroxidase 1 (VPO1) is a member of the peroxidase family which aggravates oxidative stress by producing hypochlorous acid (HOCl). Our previous study demonstrated that VPO1 plays a critical role in endothelial dysfunction through dimethylarginine dimethylaminohydrolase2 (DDAH2)/asymmetric Dimethylarginine (ADM...
journal_title:Redox biology
pub_type: 杂志文章
doi:10.1016/j.redox.2017.02.022
更新日期:2017-08-01 00:00:00