1
|
Song Y, Ren X, Gao F, Li F, Zhou J, Chen J, Zhang Y. LINC01588 regulates WWP2-mediated cardiomyocyte injury by interacting with HNRNPL. ENVIRONMENTAL TOXICOLOGY 2022; 37:1629-1641. [PMID: 35258167 DOI: 10.1002/tox.23512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 01/25/2022] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
Cardiomyocyte dysfunction and apoptosis induced by ischemia-hypoxia are common features of many acute and chronic heart diseases. WW domain-containing E3 ubiquitin ligase (WWP2) has been identified as an important regulator in pathogenesis of some health-threatening diseases. Although a couple of recent reports prompted the potential role of WWP2 in heart dysfunction, however, its exact role and how its expression was regulated in ischemic-hypoxic cardiomyocytes are still elusive. Here, we found that WWP2 protein level was induced in anoxia/reoxygenation (A/R) treated cardiomyocytes in a time-dependent manner, accompanied by synchronous expression of LINC01588 and HNRNPL. Knockdown of LINC01588 increased cardiomyocyte apoptosis, the level of oxidative stress, and expression of pro-inflammatory cytokine genes, down-regulated the expression of WWP2 and promoted expression of SEPT4 gene that contributed to cardiomyocyte dysfunction and was a target gene of WWP2. LINC01588 overexpression improved the functions of A/R treated cardiomyocytes, up-regulated WWP2 and reduced SEPT4 expression. In the mechanism exploration, we found that LINC01588 could directly bind with HNRNPL protein that could interact with WWP2, suggesting that WWP2 was involved in the regulation of LINC01588 in A/R treated cardiomyocytes. Moreover, WWP2 inhibition declined the protective role of LINC01588 in cardiomyocyte dysfunction induced by A/R. Finally, we demonstrated that LINC01588 overexpression improved acute myocardial infarction in mice in vivo. In conclusion, LINC01588 improved A/R-induced cardiomyocyte dysfunction by interacting with HNRNPL and promoting WWP2-mediated degradation of SEPT4.
Collapse
Affiliation(s)
- Yanbin Song
- Department of Cardiovasology, Yan'an University Affiliated Hospital, China
- Heart and Brain Laboratory, Yan'an University Affiliated Hospital, China
| | - Xiaoyue Ren
- Department of Oncology, Yan'an University Affiliated Hospital, China
| | - Feng Gao
- Department of Cardiovasology, Yan'an University Affiliated Hospital, China
- Heart and Brain Laboratory, Yan'an University Affiliated Hospital, China
| | - Fei Li
- Department of Cardiovasology, Yan'an University Affiliated Hospital, China
- Heart and Brain Laboratory, Yan'an University Affiliated Hospital, China
| | - Jing Zhou
- Department of Cardiovasology, Yan'an University Affiliated Hospital, China
- Heart and Brain Laboratory, Yan'an University Affiliated Hospital, China
| | - Junmin Chen
- Department of Cardiovasology, Yan'an University Affiliated Hospital, China
- Heart and Brain Laboratory, Yan'an University Affiliated Hospital, China
| | - Yunqing Zhang
- Department of Pathology, Yan'an University Affiliated Hospital, China
| |
Collapse
|
2
|
Gönczi M, Dienes B, Dobrosi N, Fodor J, Balogh N, Oláh T, Csernoch L. Septins, a cytoskeletal protein family, with emerging role in striated muscle. J Muscle Res Cell Motil 2020; 42:251-265. [PMID: 31955380 PMCID: PMC8332580 DOI: 10.1007/s10974-020-09573-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 01/06/2020] [Indexed: 12/15/2022]
Abstract
Appropriate organization of cytoskeletal components are required for normal distribution and intracellular localization of different ion channels and proteins involved in calcium homeostasis, signal transduction, and contractile function of striated muscle. Proteins of the contractile system are in direct or indirect connection with the extrasarcomeric cytoskeleton. A number of other molecules which have essential role in regulating stretch-, voltage-, and chemical signal transduction from the surface into the cytoplasm or other intracellular compartments are already well characterized. Sarcomere, the basic contractile unit, is comprised of a precisely organized system of thin (actin), and thick (myosin) filaments. Intermediate filaments connect the sarcomeres and other organelles (mitochondria and nucleus), and are responsible for the cellular integrity. Interacting proteins have a very diverse function in coupling of the intracellular assembly components and regulating the normal physiological function. Despite the more and more intense investigations of a new cytoskeletal protein family, the septins, only limited information is available regarding their expression and role in striated, especially in skeletal muscles. In this review we collected basic and specified knowledge regarding this protein group and emphasize the importance of this emerging field in skeletal muscle biology.
Collapse
Affiliation(s)
- Mónika Gönczi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, 4012, Hungary
| | - Beatrix Dienes
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, 4012, Hungary
| | - Nóra Dobrosi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, 4012, Hungary
| | - János Fodor
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, 4012, Hungary
| | - Norbert Balogh
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, 4012, Hungary.,Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, 4012, Hungary
| | - Tamás Oláh
- Center of Experimental Orthopaedics, Saarland University, 66421, Homburg, Saar, Germany
| | - László Csernoch
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, 4012, Hungary.
| |
Collapse
|
3
|
Bergqvist F, Ossipova E, Idborg H, Raouf J, Checa A, Englund K, Englund P, Khoonsari PE, Kultima K, Wheelock CE, Larsson K, Korotkova M, Jakobsson PJ. Inhibition of mPGES-1 or COX-2 Results in Different Proteomic and Lipidomic Profiles in A549 Lung Cancer Cells. Front Pharmacol 2019; 10:636. [PMID: 31231223 PMCID: PMC6567928 DOI: 10.3389/fphar.2019.00636] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/17/2019] [Indexed: 12/23/2022] Open
Abstract
Pharmacological inhibition of microsomal prostaglandin E synthase (mPGES)-1 for selective reduction in prostaglandin E2 (PGE2) biosynthesis is protective in experimental models of cancer and inflammation. Targeting mPGES-1 is envisioned as a safer alternative to traditional non-steroidal anti-inflammatory drugs (NSAIDs). Herein, we compared the effects of mPGES-1 inhibitor Compound III (CIII) with the cyclooxygenase (COX)-2 inhibitor NS-398 on protein and lipid profiles in interleukin (IL)-1β-induced A549 lung cancer cells using mass spectrometry. Inhibition of mPGES-1 decreased PGE2 production and increased PGF2α and thromboxane B2 (TXB2) formation, while inhibition of COX-2 decreased the production of all three prostanoids. Our proteomics results revealed that CIII downregulated multiple canonical pathways including eIF2, eIF4/P70S6K, and mTOR signaling, compared to NS-398 that activated these pathways. Moreover, pathway analysis predicted that CIII increased cell death of cancer cells (Z = 3.8, p = 5.1E-41) while NS-398 decreased the same function (Z = -5.0, p = 6.5E-35). In our lipidomics analyses, we found alterations in nine phospholipids between the two inhibitors, with a stronger alteration in the lysophospholipid (LPC) profile with NS-398 compared to CIII. Inhibition of mPGES-1 increased the concentration of sphinganine and dihydroceramide (C16:0DhCer), while inhibition of COX-2 caused a general decrease in most ceramides, again suggesting different effects on cell death between the two inhibitors. We showed that CIII decreased proliferation and potentiated the cytotoxic effect of the cytostatic drugs cisplatin, etoposide, and vincristine when investigated in a live cell imaging system. Our results demonstrate differences in protein and lipid profiles after inhibition of mPGES-1 or COX-2 with important implications on the therapeutic potential of mPGES-1 inhibitors as adjuvant treatment in cancer. We encourage further investigations to illuminate the clinical benefit of mPGES-1 inhibitors in cancer.
Collapse
Affiliation(s)
- Filip Bergqvist
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Elena Ossipova
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Helena Idborg
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Joan Raouf
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Antonio Checa
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Karin Englund
- Department of Analytical Chemistry, Stockholm University, Stockholm, Sweden
| | - Petter Englund
- Department of Analytical Chemistry, Stockholm University, Stockholm, Sweden
| | - Payam Emami Khoonsari
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden
| | - Kim Kultima
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden
| | - Craig E Wheelock
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Karin Larsson
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Marina Korotkova
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Per-Johan Jakobsson
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| |
Collapse
|
4
|
Piccirillo G, Carvajal Berrio DA, Laurita A, Pepe A, Bochicchio B, Schenke-Layland K, Hinderer S. Controlled and tuneable drug release from electrospun fibers and a non-invasive approach for cytotoxicity testing. Sci Rep 2019; 9:3446. [PMID: 30837604 PMCID: PMC6401126 DOI: 10.1038/s41598-019-40079-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/08/2019] [Indexed: 01/10/2023] Open
Abstract
Electrospinning is an attractive method to generate drug releasing systems. In this work, we encapsulated the cell death-inducing drug Diclofenac (DCF) in an electrospun poly-L-lactide (PLA) scaffold. The scaffold offers a system for a sustained and controlled delivery of the cytotoxic DCF over time making it clinically favourable by achieving a prolonged therapeutic effect. We exposed human dermal fibroblasts (HDFs) to the drug-eluting scaffold and employed multiphoton microscopy and fluorescence lifetime imaging microscopy. These methods were suitable for non-invasive and marker-independent assessment of the cytotoxic effects. Released DCF induced changes in cell morphology and glycolytic activity. Furthermore, we showed that drug release can be influenced by adding dimethyl sulfoxide as a co-solvent for electrospinning. Interestingly, without affecting the drug diffusion mechanism, the resulting PLA scaffolds showed altered fibre morphology and enhanced initial DCF burst release. The here described model could represent an interesting way to control the diffusion of encapsulated bio-active molecules and test them using a marker-independent, non-invasive approach.
Collapse
Affiliation(s)
- G Piccirillo
- Department of Science, University of Basilicata, 85100, Potenza, Italy
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany
| | - D A Carvajal Berrio
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany
| | - A Laurita
- Department of Science, University of Basilicata, 85100, Potenza, Italy
| | - A Pepe
- Department of Science, University of Basilicata, 85100, Potenza, Italy
| | - B Bochicchio
- Department of Science, University of Basilicata, 85100, Potenza, Italy
| | - K Schenke-Layland
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany
- Department of Biophysical Chemistry, Natural and Medical Sciences Institute (NMI) at the University of Tübingen, 72770, Reutlingen, Germany
- Department of Medicine/Cardiology, Cardiovascular Research Laboratories, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - S Hinderer
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany.
- Department of Biophysical Chemistry, Natural and Medical Sciences Institute (NMI) at the University of Tübingen, 72770, Reutlingen, Germany.
| |
Collapse
|
5
|
Robinson BL, Dumas M, Ali SF, Paule MG, Gu Q, Kanungo J. Mechanistic studies on ketamine-induced mitochondrial toxicity in zebrafish embryos. Neurotoxicol Teratol 2017; 69:63-72. [PMID: 29225006 DOI: 10.1016/j.ntt.2017.12.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 12/06/2017] [Accepted: 12/06/2017] [Indexed: 12/26/2022]
Abstract
Ketamine, a phencyclidine derivative, is an antagonist of the Ca2+-permeable N-methyl-d-aspartate (NMDA)-type glutamate receptors. It is a pediatric anesthetic and has been implicated in developmental neurotoxicity. Ketamine has also been shown to deplete ATP in mammalian cells. Our previous studies showed that acetyl l-carnitine (ALCAR) prevented ketamine-induced cardiotoxicity and neurotoxicity in zebrafish embryos. Based on our finding that ALCAR's protective effect was blunted by oligomycin A, an inhibitor of ATP synthase, we further investigated the effects of ketamine and ALCAR on ATP levels, mitochondria and ATP synthase in zebrafish embryos. The results demonstrated that ketamine reduced ATP levels in the embryos but not in the presence of ALCAR. Ketamine reduced total mitochondrial protein levels and mitochondrial potential, which were prevented with ALCAR co-treatment. To determine the cause of ketamine-induced ATP deficiency, we explored the status of ATP synthase. The results showed that a subunit of ATP synthase, atp5α1, was transcriptionally down-regulated by ketamine, but not in the presence of ALCAR, although ketamine caused a significant upregulation in another ATP synthase subunit, atp5β and total ATP synthase protein levels. Most of the ATP generated by heart mitochondria are utilized for its contraction and relaxation. Ketamine-treated embryos showed abnormal heart structure, which was abolished with ALCAR co-treatment. This study offers evidence for a potential mechanism by which ketamine could cause ATP deficiency mediated by mitochondrial dysfunction.
Collapse
Affiliation(s)
- Bonnie L Robinson
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR 72079, USA
| | - Melanie Dumas
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR 72079, USA
| | - Syed F Ali
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR 72079, USA
| | - Merle G Paule
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR 72079, USA
| | - Qiang Gu
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR 72079, USA
| | - Jyotshna Kanungo
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR 72079, USA.
| |
Collapse
|
6
|
Mashimo K, Arthur PG, Ohno Y. Ethanol Dose- and Time-dependently Increases α and β Subunits of Mitochondrial ATP Synthase of Cultured Neonatal Rat Cardiomyocytes. J NIPPON MED SCH 2016; 82:237-45. [PMID: 26568390 DOI: 10.1272/jnms.82.237] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mitochondria are target subcellular organelles of ethanol. In this study, the effects of ethanol on protein composition was examined with 2-dimensional electrophoresis of protein extracts from cultured neonatal rat cardiomyocytes exposed to 100 mM ethanol for 24 hours. A putative β subunit of mitochondrial ATP synthase was increased, which was confirmed by Western blot. The cellular protein abundances in the α and β subunits of ATP synthase increased in dose (0, 10, 50, and 100 mM) - and time (0.5 hour and 24 hours) -dependent manners. The DNA microarray analysis of total RNA extract demonstrated that gene expression of the corresponding messenger RNAs of these subunit proteins did not significantly alter due to 24-hour ethanol exposure. Therefore, protein expression of these nuclear-encoded mitochondrial proteins may be regulated at the translational, rather than the transcriptional, level. Alternatively, degradation of these subunit proteins might be decreased. Additionally, cellular ATP content of cardiomyocytes scarcely decreased following 24-hour exposure to any examined concentrations of ethanol. Previous studies, together with this study, have demonstrated that protein abundance of the α subunit or β subunit or both subunits of ATP synthase after ethanol exposure or dysfunctional conditions might differ according to tissue: significant increases in heart but decreases in liver and brain. Thus, it is suggested that the abundance of subunit proteins of mitochondrial ATP synthase in the ethanol-exposed heart, being different from that in the liver and brain, should increase dose-dependently through either translational upregulation or decreased degradation or both to maintain ATP production, as the heart requires much more energy than other tissues for continuing sustained contractions.
Collapse
|
7
|
Rabilloud T, Lescuyer P. Proteomics in mechanistic toxicology: History, concepts, achievements, caveats, and potential. Proteomics 2014; 15:1051-74. [DOI: 10.1002/pmic.201400288] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 07/25/2014] [Accepted: 08/25/2014] [Indexed: 12/19/2022]
Affiliation(s)
- Thierry Rabilloud
- Laboratory of Chemistry and Biology of Metals; CNRS UMR; 5249 Grenoble France
- Laboratory of Chemistry and Biology of Metals; Université Grenoble Alpes; Grenoble France
- Laboratory of Chemistry and Biology of Metals; CEA Grenoble; iRTSV/CBM; Grenoble France
| | - Pierre Lescuyer
- Department of Human Protein Sciences; Clinical Proteomics and Chemistry Group; Geneva University; Geneva Switzerland
- Toxicology and Therapeutic Drug Monitoring Laboratory; Department of Genetic and Laboratory Medicine; Geneva University Hospitals; Geneva Switzerland
| |
Collapse
|
8
|
Dolat L, Hu Q, Spiliotis ET. Septin functions in organ system physiology and pathology. Biol Chem 2014; 395:123-41. [PMID: 24114910 DOI: 10.1515/hsz-2013-0233] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 10/08/2013] [Indexed: 02/07/2023]
Abstract
Human septins comprise a family of 13 genes that encode for >30 protein isoforms with ubiquitous and tissue-specific expressions. Septins are GTP-binding proteins that assemble into higher-order oligomers and filamentous polymers, which associate with cell membranes and the cytoskeleton. In the last decade, much progress has been made in understanding the biochemical properties and cell biological functions of septins. In parallel, a growing number of studies show that septins play important roles for the development and physiology of specific tissues and organs. Here, we review the expression and function of septins in the cardiovascular, immune, nervous, urinary, digestive, respiratory, endocrine, reproductive, and integumentary organ systems. Furthermore, we discuss how the tissue-specific functions of septins relate to the pathology of human diseases that arise from aberrations in septin expression.
Collapse
|
9
|
Barudzic N, Turjacanin-Pantelic D, Zivkovic V, Selakovic D, Srejovic I, Joksimovic J, Jakovljevic J, Djuric DM, Jakovljevic VL. The effects of cyclooxygenase and nitric oxide synthase inhibition on oxidative stress in isolated rat heart. Mol Cell Biochem 2013; 381:301-11. [PMID: 23749198 DOI: 10.1007/s11010-013-1712-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 05/26/2013] [Indexed: 12/17/2022]
Abstract
Despite the widespread clinical use of cyclooxygenase (COX) inhibitors, dilemmas still exist about potential impact of these drugs on cardiovascular system. The present study was aimed to estimate the effects of different COX inhibitors (meloxicam, acetylsalicylic acid [ASA], and SC-560) on oxidative stress in isolated rat heart, with special focus on L-arginine/NO system. The hearts of male Wistar albino rats (total number n = 96, each group 12 rats, 8 weeks old, body mass 180-200 g) were retrogradely perfused according to the Langendorff technique at gradually increased perfusion pressure (40-120 cmH2O). After control experiments the hearts were perfused with the following drugs: 100 μmol/l ASA (Aspirin), alone or in combination with 30 μmol/l L-NAME, 0.3 μmol/l meloxicam (movalis) with or without 30 μmol/l L-NAME, 3 μmol/l meloxicam (alone or in combination with 30 μmol/l L-NAME), 30 μmol/l L-NAME, and administration of 0.25 μmol/l SC-560. In samples of coronary venous effluent the following oxidative stress markers were measured spectrophotometrically: index of lipid peroxidation (measured as thiobarbituric acid reactive substances [TBARS]), superoxide anion radical release (O2(-)), and hydrogen peroxide (H2O2). While ASA was found to have an adverse influence on redox balance in coronary circulation, and coronary perfusion, meloxicam and SC-560 do not negatively affect the intact model of the heart. Furthermore, all effects were modulated by NOS inhibition. It seems that interaction between COX and L-arginine/NO system truly exists in coronary circulation, and can be one of the possible causes for achieved effects. That means: those effects induced by different inhibitors of COX are modulated by subsequent inhibition of NOS.
Collapse
Affiliation(s)
- Nevena Barudzic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Hah YS, Noh HS, Ha JH, Ahn JS, Hahm JR, Cho HY, Kim DR. Cathepsin D inhibits oxidative stress-induced cell death via activation of autophagy in cancer cells. Cancer Lett 2012; 323:208-14. [PMID: 22542809 DOI: 10.1016/j.canlet.2012.04.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 04/17/2012] [Accepted: 04/17/2012] [Indexed: 12/19/2022]
Abstract
Cathepsin D (CatD), a lysosomal aspartic protease, plays an essential role in tumor progression and apoptosis. However, the function of CatD in cell death is not yet fully understood. In this study, we identified CatD as one of up-regulated proteins in human malignant glioblastoma M059J cells that lack the catalytic subunit of DNA-PK compared with its isogenic M059K cells with normal DNA-PK activity. M059J cells were relatively more resistant to genotoxic stress than M059K cells. Overexpression of wild-type CatD but not catalytically inactive mutant CatD (D295N) inhibited H(2)O(2)-induced cell death in HeLa cells. Furthermore, knockdown of CatD expression abolished anti-apoptotic effect by CatD in the presence of H(2)O(2). Interestingly, high expression of CatD in HeLa cells significantly activated autophagy: increase of acidic autophagic vacuoles, LC3-II formation, and GFP-LC3 puncta. These results suggest that CatD can function as an anti-apoptotic mediator by inducing autophagy under cellular stress. In conclusion, inhibition of autophagy could be a novel strategy for the adjuvant chemotherapy of CatD-expressing cancers.
Collapse
Affiliation(s)
- Young-Sool Hah
- Clinical Research Institute, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
11
|
Hahm JR, Ahn JS, Noh HS, Baek SM, Ha JH, Jung TS, An YJ, Kim DK, Kim DR. Comparative analysis of fat and muscle proteins in fenofibratefed type II diabetic OLETF rats: the fenofibrate-dependent expression of PEBP or C11orf59 protein. BMB Rep 2010; 43:337-43. [DOI: 10.5483/bmbrep.2010.43.5.337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
|