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Antioxidants & Redox Signaling

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https://www.readbyqxmd.com/read/29351723/mitochondrial-uncoupling-proteins-subtle-regulators-of-cellular-redox-signaling
#1
Petr Jezek, Blanka Holendová, Keith D Garlid, Martin Jaburek
SIGNIFICANCE: Mitochondria are the energetic, metabolic, redox and information signaling centers of the cell. Substrate pressure, mitochondrial network dynamics and cristae morphology state are integrated by the protonmotive force Δp or its potential component, ΔΨ, which are attenuated by proton backflux into the matrix, termed uncoupling. The mitochondrial uncoupling proteins (UCP1-5) play an eminent role in the regulation of each of the above aspects, being involved in numerous physiological events including redox signaling...
January 19, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29350061/the-adverse-effects-of-environmental-noise-exposure-on-oxidative-stress-and-cardiovascular-risk
#2
Thomas Münzel, Mette Sørensen, Frank P Schmidt, Erwin Schmidt, Sebastian Steven, Swenja Kröller-Schön, Andreas Daiber
Epidemiological studies have provided evidence that traffic noise exposure is linked to cardiovascular diseases such as arterial hypertension, myocardial infarction and stroke. Noise is a non-specific stressor that activates the autonomous nervous system and endocrine signaling. According to the noise reaction model introduced by Babisch and colleagues, chronic low levels of noise can cause so called non-auditory effects, such as disturbances of activity, sleep and communication, which can trigger a number of emotional responses, including annoyance and subsequent stress...
January 19, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29350049/targeted-and-off-target-bystander-and-abscopal-effects-of-radiation-therapy-redox-mechanisms-and-risk-benefit-analysis
#3
Jean-Pierre Pouget, Alexandros G Georgakilas, Jean-Luc Ravanat
Radiation therapy (from external beams to unsealed and sealed radionuclide sources) takes advantage of the detrimental effects of the clustered production of radicals and reactive oxygen species (ROS). Research has mainly focused on the interaction of radiation with water, which is the major constituent of living beings, and with nuclear DNA, which contains the genetic information. This led to the so-called "target" theory according to which cells have to be hit by ionizing particles to elicit an important biological response, including cell death...
January 19, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29343087/sulfhydrated-sirtuin-1-increasing-its-deacetylation-activity-is-an-essential-epigenetics-mechanism-of-anti-atherogenesis-by-hydrogen-sulfide
#4
Congkuo Du, Xianjuan Lin, Wenjing Xu, Fengjiao Zheng, Junyan Cai, Jichun Yang, Qinghua Cui, Chaoshu Tang, Jun Cai, Guoheng Xu, Bin Geng
AIMS: Hydrogen sulfide (H2S) has a protective role in the pathogenesis of atherosclerosis by multiple pathways. Sirtuin-1 (SIRT1) is a histone deacetylase, as an essential mediated longevity gene, and has an anti-atherogenic effect by regulating the acetylation of some functional proteins. Whether SIRT1 is involved in protecting H2S in atherosclerosis and its mechanism remains unclear. RESULTS: In ApoE-knockout atherosclerosis mice, treatment with an H2S donor (NaHS or GYY4137) reduced atherosclerotic plaque area, macrophage infiltration, aortic inflammation and plasma lipid level...
January 17, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334763/long-non-coding-rna-linc01619-regulates-mir-27a-foxo1-and-endoplasmic-reticulum-stress-mediated-podocyte-injury-in-diabetic-nephropathy
#5
Xiaoyan Bai, Jian Geng, Xiao Li, Jiao Wan, Jixing Liu, Zhan Mei Zhou, Xiaoting Liu
AIMS: Altered activities of long non-coding RNAs (lncRNAs) have been implicated in the regulation of microRNAs. MicroRNA-27a (miR-27a) upregulation has been shown to induce endoplasmic reticulum stress (ER stress) and podocyte injury in diabetic nephropathy (DN). Herein, we aim to interrogate the mutually regulated network of miR-27a with long intergenic non-coding RNA 1619 (LINC01619) and the target gene. RESULTS: LINC01619 downregulation was found in human DN renal biopsy tissues and contributed to proteinuria and diminished renal function...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334762/altered-redox-state-modulates-endothelial-kca2-3-and-kca3-1-levels-in-normal-pregnancy-and-preeclampsia
#6
Shinkyu Choi, Ji Aee Kim, Hai-Yan Li, Sae-Jin Lee, Ye Seon Seok, Tae Hun Kim, Ki-Hwan Han, Mi Hye Park, Geum Joon Cho, Suk Hyo Suh
AIMS: Altered redox state has been related to the development of normal pregnancy (NP) and preeclampsia (PE). Endothelial KCa2.3 and KCa3.1 (KCas) play an important role in vasodilation, and KCas levels are affected by oxidative stress. We investigated the mechanisms of oxidative stress-mediated KCas expression modulation during NP and PE. RESULTS: Human uterine microvascular endothelial cells were incubated in serum from normal non-pregnant women (n=13) and women with NP (n=24) or PE (n=15), or in VEGF, oxidized low-density lipoprotein (ox-LDL), progesterone, or estradiol-17-containing medium for 24 hours...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334761/regulation-of-cancer-and-cancer-related-genes-via-nad
#7
Tanveer Sharif, Emma Martell, Cathleen Dai, Mohammad Ghassemi-Rad, Barry Kennedy, Patrick Lee, Shashi Gujar
SIGNIFICANCE: NAD+ is an essential redox cofactor in cellular metabolism and has emerged as an important regulator of a wide spectrum of disease conditions, most notably, cancers. As such, various strategies targeting NAD+ synthesis in cancers are in clinical trials. Recent Advances: Being a substrate required for the activity of various enzyme families, especially sirtuins and poly(ADP-ribose) polymerases, NAD+-mediated signaling plays an important role in gene expression, calcium release, cell cycle progression, DNA repair and cell proliferation...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334759/redox-nano-architectures-perspectives-and-implications-in-diagnosis-and-treatment-of-human-diseases
#8
Shamim Akhtar Sufi, Sankar Pajaniradje, Victor Mukherjee, Rukkumani Rajagopalan
Significance - Efficient targeted therapy with minimal side effects is the need of the hour.. Locally altered redox state is observed in several human ailments, such as inflammation, sepsis, and cancer. This has been taken advantage in designing redox-responsive nano-drug carriers. Redox-responsive nanosystems open a door to multitude of possibilities for the control of diseases over other drug delivery systems. Recent Advances -The first generation nanotherapy relies on novel properties of nanomaterials to shield the drug and deliver it to the diseased tissue or organ...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334758/anticancer-thiosemicarbazones-chemical-properties-interaction-with-iron-metabolism-and-resistance-development
#9
Petra Heffeter, Veronika F S Pape, Eva A Enyedy, Bernhard K Keppler, Gergely Szakas, Christian R Kowol
SIGNIFICANCE: During the last decades, thiosemicarbazones have been clinically developed for a variety of diseases including tuberculosis, viral infections, malaria and cancer. With regard to malignant diseases, the class of α-N-heterocyclic thiosemicarbazones, and here especially Triapine, was intensively developed in multiple clinical phase I/II trials. Recent Advances: Very recently two new derivatives, namely COTI-2 and DpC have entered phase I evaluation. Based on the strong metal-chelating/metal-interacting properties of thiosemicarbazones, interference with the cellular iron (and copper) homeostasis is assumed to play an important role in their biological activity...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29334756/thioredoxin-1-negatively-modulates-adam17-activity-through-direct-binding-and-indirect-reductive-activity
#10
Daniela Granato, Rute A P Costa, Rebeca Kawahara, Sami Yokoo, Annelize Aragao, Romenia Domingues, Bianca Pauletti, Rodrigo Honorato, Juliana Fattori, Ana Figueira, Paulo Oliveira, Silvio Consonni, Denise Castro Fernandes, Francisco Rafael Martins Laurindo, Hinrich Hansen, Adriana F Paes Leme
A Disintegrin And Metalloprotease 17 (ADAM17) modulates signaling events by releasing surface protein ectodomains such as TNFα and the EGFR-ligands. We have previously characterized cytoplasmic thioredoxin-1 (Trx-1) as a partner of ADAM17 cytoplasmic domain. Combining discovery and targeted proteomic approaches, we uncovered that Trx-1 negatively regulates ADAM17 by direct and indirect effect. We performed cell-based assays with synthetic peptides and site-directed mutagenesis and we demonstrated that the interaction interface of Trx-1 and ADAM17 is important for the negative regulation of ADAM17 activity...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29325444/redox-paradox-a-novel-approach-to-therapeutics-resistant-cancer
#11
Luksana Chaiswing, William H St Clair, Daret K St Clair
Cancer cells that are resistant to radiation and chemotherapy are a major problem limiting the success of cancer therapy. Aggressive cancer cells depend on elevated intracellular levels of reactive oxygen species (ROS) to proliferate, self-renew, and metastasize. As a result, these aggressive cancers maintain high basal levels of ROS compared to normal cells. The prominence of the redox state in cancer cells led us to consider whether increasing the redox state to the condition of oxidative stress could be used as a successful adjuvant therapy for aggressive cancers...
January 12, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29320870/transgenic-organisms-meet-redox-bioimaging-one-step-closer-to-physiology
#12
Lija Swain, Maithily Nanadikar, Sergej Borowik, Anke Zieseniss, Dörthe Magdalena Katschinski
SIGNIFICANCE: Redox signaling is a common mechanism in the cellular response towards a variety of stimuli. For analyzing redox-dependent specific alterations in a cell, genetically encoded biosensors were highly instrumental in the past. To advance the knowledge about the importance of this signaling mechanism in vivo, models, which are as close as possible to physiology are needed. Recent advances: The development of transgenic redox biosensor animal models has enhanced the knowledge of redox signaling under patho(physio)logical conditions...
January 10, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29320869/challenges-and-opportunities-for-small-molecule-fluorescent-probes-in-redox-biology-applications
#13
Xiqian Jiang, Lingfei Wang, Shaina Laufer Carroll, Jianwei Chen, Meng C Wang, Jin Wang
SIGNIFICANCE: The concentrations of reactive oxygen/nitrogen species (ROS/RNS) are critical to various biochemical processes. Small molecule fluorescent probes have been widely used to detect and/or quantify ROS/RNS in many redox biology studies and serve as an important complementary to protein-based sensors with unique applications. Recent Advances: New sensing reactions have emerged in probe development allowing more selective and quantitative detection of ROS/RNS, especially in live cells...
January 10, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29316804/renal-protective-effect-of-hydrogen-sulfide-in-cisplatin-induced-nephrotoxicity
#14
Xu Cao, Siping Xiong, Yebo Zhou, Zhi-Yuan Wu, Lei Ding, Yike Zhu, Mark Wood, Matthew Whiteman, Philip K Moore, Jin-Song Bian
AIMS: Cisplatin is a major therapeutic drug for solid tumors, but can cause severe nephrotoxicity. However, the role and therapeutic potential of hydrogen sulfide (H2S), an endogenous gaso-transmitter, in cisplatin-induced nephrotoxicity remains to be defined. RESULTS: Cisplatin led to the impairment of H2S production in vitro and in vivo by downregulating the expression level of cystathionine γ-lyase (CSE), which may contribute to the subsequent renal proximal tubule (RPT) cell death and thereby renal toxicity...
January 9, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29186971/reactive-oxygen-species-and-oncoprotein-signaling-a-dangerous-liaison
#15
Stephen Jun Fei Chong, Jolin Xiao Hui Lai, Jie Qing Eu, Gregory Lucien Bellot, Shazib Pervaiz
SIGNIFICANCE: There is evidence to implicate reactive oxygen species (ROS) in tumorigenesis and its progression. This has been associated with the interplay between ROS and oncoproteins, resulting in enhanced cellular proliferation and survival. Recent Advances: To date, studies have investigated specific contributions of the crosstalk between ROS and signaling networks in cancer initiation and progression. These investigations have challenged the established dogma of ROS as agents of cell death by demonstrating a secondary function that fuels cell proliferation and survival...
January 9, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29310441/dihydromyricetin-ameliorates-nonalcoholic-fatty-liver-disease-by-improving-mitochondrial-respiratory-capacity-and-redox-homeostasis-through-modulation-of-sirt3-signaling
#16
Xianglong Zeng, Jining Yang, Ou Hu, Juan Huang, Li Ran, Mengting Chen, Yu Zhang, Xi Zhou, Jundong Zhu, Qianyong Zhang, Long Yi, Mantian Mi
AIMS: Our previous clinical trial indicated that the flavonoid dihydromyricetin (DHM) could improve hepatic steatosis in patients with NAFLD, altough the potential mechanisms of these effects remained elusive. Here, we investigated the hepatoprotective role of DHM on high-fat diet (HFD)-induced NAFLD. RESULTS: DHM supplementation could effectively ameliorate the development of NAFLD by inhibiting hepatic lipids accumulation both in HFD-fed wild type mice and in palmitic acid (PA)-induced hepatocytes...
January 8, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29304561/crosstalk-between-cellular-redox-state-and-the-anti-apoptotic-protein-bcl-2
#17
Sebastian Other-Gee Pohl, Mark Agostino, Arun Dharmarajan, Shazib Pervaiz
SIGNIFICANCE B cell lymphoma-2 (Bcl-2) is the prototypical anti-apoptotic member of the Bcl-2 family that comprises proteins with contrasting effects on cell fate. Identified as a consequence chromosomal translocation (t 14:18) in human lymphoma, subsequent studies have revealed mutations and/or copy number alterations, as well as post-translational modifications, of Bcl-2 in a variety of cancers. The canonical function of Bcl-2 is linked to its ability to inhibit mitochondrial membrane permeabilization, regulating apoptosome assembly and activation by blocking cytosolic translocation of death amplification factors...
January 5, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29304557/abnormal-golgi-ph-homeostasis-in-cancer-cells-impairs-apical-targeting-of-carcinoembryonic-antigen-ceacam5-by-inhibiting-its-gpi-anchor-mediated-association-with-lipid-rafts
#18
Nina Kokkonen, Elham Khosrowabadi, Antti Hassinen, Deborah Harrus, Tuomo Glumoff, Thomas Kietzmann, Sakari Kellokumpu
Carcinoembryonic antigen (CEACAM5, CEA) is a known tumor marker for colorectal cancer that localizes in a polarized manner to the apical surface in normal colon epithelial cells while in cancer cells it is present at both the apical and basolateral surfaces of the cells. Since the Golgi apparatus sorts and transports most proteins to these cell surface domains, we set out here to investigate whether any of the factors commonly associated with tumorigenesis including hypoxia, generation of reactive oxygen species (ROS), altered redox homeostasis or an altered Golgi pH, are responsible for mistargeting of CEA to the basolateral surface in cancer cells...
January 5, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29304555/the-epigenetic-contribution-to-the-development-and-progression-of-vascular-diabetic-complications
#19
Hanah Rodriguez, Assam El-Osta
SIGNIFICANCE: The number of people suffering from diabetes worldwide is steadily rising. Complications from diabetes, including cardiovascular and renal disease, contribute to the high morbidity and mortality associated with this disease. Recent Advances: hyperglycaemia promotes tissue damage through diverse mechanisms involving increased production of reactive oxygen species (ROS). Increased oxidative stress drives changes in chromatin structure that mediate gene expression changes leading to the up-regulation of pro-inflammatory and pro-fibrotic mediators...
January 5, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29304554/-i-in-vivo-i-epr-radical-concepts-for-translation-to-the-clinical-setting
#20
Valery V Khramtsov
EPR-based spectroscopic and imaging techniques allow for the study of free radicals - molecules with one or more unpaired electrons. Biological EPR applications include detection of endogenous biologically-relevant free radicals as well as use of specially designed exogenous radicals to probe local microenvironments. This forum issue focuses on recent advances in the field of <i>in vivo</i> EPR applications discussed at the International Conference on Electron Paramagnetic Resonance Spectroscopy and Imaging of Biological Systems (EPR-2017)...
January 5, 2018: Antioxidants & Redox Signaling
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