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Jiang B, Zhou X, Yang T, Wang L, Feng L, Wang Z, Xu J, Jing W, Wang T, Su H, Yang G, Zhang Z. The role of autophagy in cardiovascular disease: Cross-interference of signaling pathways and underlying therapeutic targets. Front Cardiovasc Med 2023; 10:1088575. [PMID: 37063954 PMCID: PMC10090687 DOI: 10.3389/fcvm.2023.1088575] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/13/2023] [Indexed: 03/31/2023] Open
Abstract
Autophagy is a conserved lysosomal pathway for the degradation of cytoplasmic proteins and organelles, which realizes the metabolic needs of cells and the renewal of organelles. Autophagy-related genes (ATGs) are the main molecular mechanisms controlling autophagy, and their functions can coordinate the whole autophagic process. Autophagy can also play a role in cardiovascular disease through several key signaling pathways, including PI3K/Akt/mTOR, IGF/EGF, AMPK/mTOR, MAPKs, p53, Nrf2/p62, Wnt/β-catenin and NF-κB pathways. In this paper, we reviewed the signaling pathway of cross-interference between autophagy and cardiovascular diseases, and analyzed the development status of novel cardiovascular disease treatment by targeting the core molecular mechanism of autophagy as well as the critical signaling pathway. Induction or inhibition of autophagy through molecular mechanisms and signaling pathways can provide therapeutic benefits for patients. Meanwhile, we hope to provide a unique insight into cardiovascular treatment strategies by understanding the molecular mechanism and signaling pathway of crosstalk between autophagy and cardiovascular diseases.
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Affiliation(s)
- Bing Jiang
- Department of Integrated Chinese and Western Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Xuan Zhou
- Department of First Clinical Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Tao Yang
- Department of Basic Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Linlin Wang
- Department of First Clinical Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Longfei Feng
- Department of Basic Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Zheng Wang
- Department of Integrated Chinese and Western Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Jin Xu
- Department of First Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Weiyao Jing
- Department of Acupuncture-Moxibustion and Tuina, Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Tao Wang
- Research Center for Translational Medicine, Gansu Province Academic Institute for Medical Research, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - Haixiang Su
- Research Center for Translational Medicine, Gansu Province Academic Institute for Medical Research, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - GuoWei Yang
- Center for Heart, First Hospital of Lanzhou University, Lanzhou, China
| | - Zheng Zhang
- Department of Integrated Chinese and Western Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Center for Heart, First Hospital of Lanzhou University, Lanzhou, China
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2
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Ishii T, Warabi E, Mann GE. Stress Activated MAP Kinases and Cyclin-Dependent Kinase 5 Mediate Nuclear Translocation of Nrf2 via Hsp90α-Pin1-Dynein Motor Transport Machinery. Antioxidants (Basel) 2023; 12:antiox12020274. [PMID: 36829834 PMCID: PMC9952688 DOI: 10.3390/antiox12020274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/19/2023] [Accepted: 01/22/2023] [Indexed: 01/28/2023] Open
Abstract
Non-lethal low levels of oxidative stress leads to rapid activation of the transcription factor nuclear factor-E2-related factor 2 (Nrf2), which upregulates the expression of genes important for detoxification, glutathione synthesis, and defense against oxidative damage. Stress-activated MAP kinases p38, ERK, and JNK cooperate in the efficient nuclear accumulation of Nrf2 in a cell-type-dependent manner. Activation of p38 induces membrane trafficking of a glutathione sensor neutral sphingomyelinase 2, which generates ceramide upon depletion of cellular glutathione. We previously proposed that caveolin-1 in lipid rafts provides a signaling hub for the phosphorylation of Nrf2 by ceramide-activated PKCζ and casein kinase 2 to stabilize Nrf2 and mask a nuclear export signal. We further propose a mechanism of facilitated Nrf2 nuclear translocation by ERK and JNK. ERK and JNK phosphorylation of Nrf2 induces the association of prolyl cis/trans isomerase Pin1, which specifically recognizes phosphorylated serine or threonine immediately preceding a proline residue. Pin1-induced structural changes allow importin-α5 to associate with Nrf2. Pin1 is a co-chaperone of Hsp90α and mediates the association of the Nrf2-Pin1-Hsp90α complex with the dynein motor complex, which is involved in transporting the signaling complex to the nucleus along microtubules. In addition to ERK and JNK, cyclin-dependent kinase 5 could phosphorylate Nrf2 and mediate the transport of Nrf2 to the nucleus via the Pin1-Hsp90α system. Some other ERK target proteins, such as pyruvate kinase M2 and hypoxia-inducible transcription factor-1, are also transported to the nucleus via the Pin1-Hsp90α system to modulate gene expression and energy metabolism. Notably, as malignant tumors often express enhanced Pin1-Hsp90α signaling pathways, this provides a potential therapeutic target for tumors.
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Affiliation(s)
- Tetsuro Ishii
- School of Medicine, University of Tsukuba, Tsukuba 305-8577, Japan
- Correspondence:
| | - Eiji Warabi
- School of Medicine, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Giovanni E. Mann
- King’s British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, 150 Stamford Street, London SE1 9NH, UK
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3
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Cheng CI, Tai MH, Chang HR, Chou MH, Chen GT, Chen PH, Kao YH. Oxidized low-density lipoprotein induced hepatoma-derived growth factor upregulation mediates foam cell formation of cultured rat aortic vascular smooth muscle cells. Eur J Cell Biol 2021; 100:151169. [PMID: 34273665 DOI: 10.1016/j.ejcb.2021.151169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/22/2021] [Accepted: 07/02/2021] [Indexed: 11/18/2022] Open
Abstract
Vascular smooth muscle cells (SMCs) are important vascular components that are essential for the regulation of vascular functions during vascular atherosclerogenesis and vascular injury. Oxidized low-density lipoprotein (oxLDL) is known to induce SMC activation and foam cell transformation. This study characterized the role of hepatoma-derived growth factor (HDGF) in oxLDL-induced foam cell formation in cultured primary rat aortic SMCs. OxLDL exposure significantly increased HDGF expression and extracellular release. It also upregulated atherogenic regulators in SMCs, including TLR4, MyD88, LOX-1, and CD36. Exogenous HDGF stimulation not only increased the expression of cognate receptor nucleolin, but also the innate immunity regulators TLR4/MyD88 and lipid metabolism regulators, including LOX-1 and CD36. Oil red O staining showed that HDGF did not initiate, but enhanced oxLDL-driven foam cell formation in SMCs. Further signaling characterization demonstrated that oxLDL evoked activation of PI3K/Akt and p38 MAPK signaling pathways, both of which were involved in the upregulation of HDGF, LOX-1, and CD36 induced by oxLDL. Gene knockdown experiments using LOX-1 targeted siRNA demonstrated that LOX-1 expression was critical for oxLDL-induced HDGF upregulation, while HDGF gene depletion completely abolished oxLDL-triggered TLR4, LOX-1, and CD36 overexpression and foam cell formation in SMCs. These findings strongly suggest that oxLDL-induced HDGF upregulation participates in subsequent LOX-1 and CD36 expression in aortic SMCs and mechanistically contributes to the formation of SMC-derived foam cells. The oxLDL/LOX-1/HDGF axis may serve as a target for anti-atherogenesis therapy.
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Affiliation(s)
- Cheng-I Cheng
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
| | - Ming-Hong Tai
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Huoy-Rou Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Ming-Huei Chou
- Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung, Taiwan; Center for General Education, Cheng-Shiu University, Kaohsiung, Taiwan
| | - Guan-Ting Chen
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Po-Han Chen
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Ying-Hsien Kao
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan.
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Transcriptomic Changes Associated with Loss of Cell Viability Induced by Oxysterol Treatment of a Retinal Photoreceptor-Derived Cell Line: An In Vitro Model of Smith-Lemli-Opitz Syndrome. Int J Mol Sci 2021; 22:ijms22052339. [PMID: 33652836 PMCID: PMC7956713 DOI: 10.3390/ijms22052339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 11/17/2022] Open
Abstract
Smith–Lemli–Opitz Syndrome (SLOS) results from mutations in the gene encoding the enzyme DHCR7, which catalyzes conversion of 7-dehydrocholesterol (7DHC) to cholesterol (CHOL). Rats treated with a DHCR7 inhibitor serve as a SLOS animal model, and exhibit progressive photoreceptor-specific cell death, with accumulation of 7DHC and oxidized sterols. To understand the basis of this cell type specificity, we performed transcriptomic analyses on a photoreceptor-derived cell line (661W), treating cells with two 7DHC-derived oxysterols, which accumulate in tissues and bodily fluids of SLOS patients and in the rat SLOS model, as well as with CHOL (negative control), and evaluated differentially expressed genes (DEGs) for each treatment. Gene enrichment analysis and compilation of DEG sets indicated that endoplasmic reticulum stress, oxidative stress, DNA damage and repair, and autophagy were all highly up-regulated pathways in oxysterol-treated cells. Detailed analysis indicated that the two oxysterols exert their effects via different molecular mechanisms. Changes in expression of key genes in highlighted pathways (Hmox1, Ddit3, Trib3, and Herpud1) were validated by immunofluorescence confocal microscopy. The results extend our understanding of the pathobiology of retinal degeneration and SLOS, identifying potential new druggable targets for therapeutic intervention into these and other related orphan diseases.
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An Overview of Nrf2 Signaling Pathway and Its Role in Inflammation. Molecules 2020; 25:molecules25225474. [PMID: 33238435 PMCID: PMC7700122 DOI: 10.3390/molecules25225474] [Citation(s) in RCA: 538] [Impact Index Per Article: 134.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/13/2020] [Accepted: 11/19/2020] [Indexed: 12/16/2022] Open
Abstract
Inflammation is a key driver in many pathological conditions such as allergy, cancer, Alzheimer’s disease, and many others, and the current state of available drugs prompted researchers to explore new therapeutic targets. In this context, accumulating evidence indicates that the transcription factor Nrf2 plays a pivotal role controlling the expression of antioxidant genes that ultimately exert anti-inflammatory functions. Nrf2 and its principal negative regulator, the E3 ligase adaptor Kelch-like ECH- associated protein 1 (Keap1), play a central role in the maintenance of intracellular redox homeostasis and regulation of inflammation. Interestingly, Nrf2 is proved to contribute to the regulation of the heme oxygenase-1 (HO-1) axis, which is a potent anti-inflammatory target. Recent studies showed a connection between the Nrf2/antioxidant response element (ARE) system and the expression of inflammatory mediators, NF-κB pathway and macrophage metabolism. This suggests a new strategy for designing chemical agents as modulators of Nrf2 dependent pathways to target the immune response. Therefore, the present review will examine the relationship between Nrf2 signaling and the inflammation as well as possible approaches for the therapeutic modulation of this pathway.
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6
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Guo C, Davies MJ, Hawkins CL. Role of thiocyanate in the modulation of myeloperoxidase-derived oxidant induced damage to macrophages. Redox Biol 2020; 36:101666. [PMID: 32781424 PMCID: PMC7417949 DOI: 10.1016/j.redox.2020.101666] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/20/2020] [Accepted: 07/28/2020] [Indexed: 12/13/2022] Open
Abstract
Myeloperoxidase (MPO) is a vital component of the innate immune system, which produces the potent oxidant hypochlorous acid (HOCl) to kill invading pathogens. However, an overproduction of HOCl during chronic inflammatory conditions causes damage to host cells, which promotes disease, including atherosclerosis. As such, there is increasing interest in the use of thiocyanate (SCN-) therapeutically to decrease inflammatory disease, as SCN- is the favoured substrate for MPO, and a potent competitive inhibitor of HOCl formation. Use of SCN- by MPO forms hypothiocyanous acid (HOSCN), which can be less damaging to mammalian cells. In this study, we examined the ability of SCN- to modulate damage to macrophages induced by HOCl, which is relevant to lesion formation in atherosclerosis. Addition of SCN- prevented HOCl-mediated cell death, altered the extent and nature of thiol oxidation and the phosphorylation of mitogen activated protein kinases. These changes were dependent on the concentration of SCN- and were observed in some cases, at a sub-stoichiometric ratio of SCN-: HOCl. Co-treatment with SCN- also modulated HOCl-induced perturbations in the expression of various antioxidant and inflammatory genes. In general, the data reflect the conversion of HOCl to HOSCN, which can induce reversible modifications that are repairable by cells. However, our data also highlight the ability of HOSCN to increase pro-inflammatory gene expression and cytokine/chemokine release, which may be relevant to the use of SCN- therapeutically in atherosclerosis. Overall, this study provides further insight into the cellular pathways by which SCN- could exert protective effects on supplementation to decrease the development of chronic inflammatory diseases, such as atherosclerosis.
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Affiliation(s)
- Chaorui Guo
- Department of Biomedical Sciences, University of Copenhagen, Panum, Blegdamsvej 3B, Copenhagen, DK-2200, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, University of Copenhagen, Panum, Blegdamsvej 3B, Copenhagen, DK-2200, Denmark
| | - Clare L Hawkins
- Department of Biomedical Sciences, University of Copenhagen, Panum, Blegdamsvej 3B, Copenhagen, DK-2200, Denmark.
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Martelli A, Citi V, Testai L, Brogi S, Calderone V. Organic Isothiocyanates as Hydrogen Sulfide Donors. Antioxid Redox Signal 2020; 32:110-144. [PMID: 31588780 DOI: 10.1089/ars.2019.7888] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Significance: Hydrogen sulfide (H2S), the "new entry" in the series of endogenous gasotransmitters, plays a fundamental role in regulating the biological functions of various organs and systems. Consequently, the lack of adequate levels of H2S may represent the etiopathogenetic factor of multiple pathological alterations. In these diseases, the use of H2S donors represents a precious and innovative opportunity. Recent Advances: Natural isothiocyanates (ITCs), sulfur compounds typical of some botanical species, have long been investigated because of their intriguing pharmacological profile. Recently, the ITC moiety has been proposed as a new H2S-donor chemotype (with a l-cysteine-mediated reaction). Based on this recent discovery, we can clearly observe that almost all the effects of natural ITCs can be explained by the H2S release. Consistently, the ITC function was also used as an original H2S-releasing moiety for the design of synthetic H2S donors and original "pharmacological hybrids." Very recently, the chemical mechanism of H2S release, resulting from the reaction between l-cysteine and some ITCs, has been elucidated. Critical Issues: Available literature gives convincing demonstration that H2S is the real player in ITC pharmacology. Further, countless studies have been carried out on natural ITCs, but this versatile moiety has been used only rarely for the design of synthetic H2S donors with optimal drug-like properties. Future Directions: The development of more ITC-based synthetic H2S donors with optimal drug-like properties and selectivity toward specific tissues/pathologies seem to represent a stimulating and indispensable prospect of future experimental activities.
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Affiliation(s)
- Alma Martelli
- Department of Pharmacy, University of Pisa, Pisa, Italy.,Interdepartmental Research Centre "Nutraceuticals and Food for Health (NUTRAFOOD)," University of Pisa, Pisa, Italy.,Interdepartmental Research Centre of "Ageing Biology and Pathology," University of Pisa, Pisa, Italy
| | | | - Lara Testai
- Department of Pharmacy, University of Pisa, Pisa, Italy.,Interdepartmental Research Centre "Nutraceuticals and Food for Health (NUTRAFOOD)," University of Pisa, Pisa, Italy.,Interdepartmental Research Centre of "Ageing Biology and Pathology," University of Pisa, Pisa, Italy
| | - Simone Brogi
- Department of Pharmacy, University of Pisa, Pisa, Italy
| | - Vincenzo Calderone
- Department of Pharmacy, University of Pisa, Pisa, Italy.,Interdepartmental Research Centre "Nutraceuticals and Food for Health (NUTRAFOOD)," University of Pisa, Pisa, Italy.,Interdepartmental Research Centre of "Ageing Biology and Pathology," University of Pisa, Pisa, Italy
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8
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Ungvari Z, Tarantini S, Nyúl-Tóth Á, Kiss T, Yabluchanskiy A, Csipo T, Balasubramanian P, Lipecz A, Benyo Z, Csiszar A. Nrf2 dysfunction and impaired cellular resilience to oxidative stressors in the aged vasculature: from increased cellular senescence to the pathogenesis of age-related vascular diseases. GeroScience 2019; 41:727-738. [PMID: 31655958 PMCID: PMC6925097 DOI: 10.1007/s11357-019-00107-w] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 09/13/2019] [Indexed: 01/29/2023] Open
Abstract
Aging is associated with increased oxidative stress in vascular endothelial and smooth muscle cells, which contribute to the development of a wide range of diseases affecting the circulatory system in older adults. There is growing evidence that in addition to increased production of reactive oxygen species (ROS), aging critically impairs pathways determining cellular resilience to oxidative stressors. In young organisms, the evolutionarily conserved nuclear factor-erythroid-2-related factor 2 (Nrf2)-mediated antioxidant response pathway maintains cellular reduction-oxidation homeostasis and promotes a youthful cellular phenotype by regulating the transcription of an array of cytoprotective (antioxidant, pro-survival, anti-inflammatory and macromolecular damage repair) genes. A critical mechanism by which increased ROS production and Nrf2 dysfunction promote vascular aging and exacerbate pathogenesis of age-related vascular diseases is induction of cellular senescence, an evolutionarily conserved cellular stress response mechanism. Senescent cells cease dividing and undergo distinctive phenotypic alterations, contributing to impairment of angiogenic processes, chronic sterile inflammation, remodeling of the extracellular matrix, and barrier dysfunction. Herein, we review mechanisms contributing to dysregulation of Nrf2-driven cytoprotective responses in the aged vasculature and discuss the multifaceted role of Nrf2 dysfunction in the genesis of age-related pathologies affecting the circulatory system, including its role in induction of cellular senescence. Therapeutic strategies that restore Nrf2 signaling and improve vascular resilience in aging are explored to reduce cardiovascular mortality and morbidity in older adults.
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Affiliation(s)
- Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine, Department of Public Health, Semmelweis University, Budapest, Hungary.
- International Training Program in Geroscience, Theoretical Medicine Doctoral School, Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary.
- Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma HSC, 975 N. E. 10th Street - BRC 1303, Oklahoma City, OK, 73104, USA.
| | - Stefano Tarantini
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine, Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Ádám Nyúl-Tóth
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Biological Research Centre, Institute of Biophysics, Szeged, Hungary
| | - Tamas Kiss
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Theoretical Medicine Doctoral School, Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Tamas Csipo
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine, Department of Public Health, Semmelweis University, Budapest, Hungary
- International Training Program in Geroscience, Division of Clinical Physiology, Department of Cardiology, Kalman Laki Doctoral School, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Priya Balasubramanian
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Agnes Lipecz
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Zoltan Benyo
- Doctoral School of Basic and Translational Medicine, Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Theoretical Medicine Doctoral School, Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
- Doctoral School of Basic and Translational Medicine, Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
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9
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Priestley JRC, Fink KE, McCord JM, Lombard JH. NRF2 activation with Protandim attenuates salt-induced vascular dysfunction and microvascular rarefaction. Microcirculation 2019; 26:e12575. [PMID: 31132190 DOI: 10.1111/micc.12575] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 05/07/2019] [Accepted: 05/22/2019] [Indexed: 12/18/2022]
Abstract
HYPOTHESIS This study tested the hypothesis that dietary activation of the master antioxidant and cell protective transcription factor nuclear factor, erythroid -2-like 2 (NRF2), protects against salt-induced vascular dysfunction by restoring redox homeostasis in the vasculature. METHODS Male Sprague-Dawley rats and Syrian hamsters were fed a HS (4.0% NaCl) diet containing ~60 mg/kg/day Protandim supplement for 2 weeks and compared to controls fed HS diet alone. RESULTS Protandim supplementation restoredendothelium-dependent vasodilation in response to acetylcholine (ACh) in middle cerebral arteries (MCA)of HS-fed rats and hamster cheek pouch arterioles, and increased microvessel density in the cremastermuscle of HS-fed rats. The restored dilation to ACh in MCA of Protandim-treated rats was prevented by inhibiting nitric oxide synthase (NOS) with L-NAME [100 μM] and was absent in MCA from Nrf2(-/-) knockout rats fed HS diet. Basilar arteries from HS-fed rats treated with Protandim exhibited significantly lower staining for mitochondrial oxidizing species than untreated animals fed HS diet alone; and Protandim treatment increased MnSOD (SOD2) protein expression in mesenteric arteries of HS-fed rats. CONCLUSIONS These results suggest that dietary activation of NRF2 protects against salt-induced vascular dysfunction, vascular oxidative stress, and microvascular rarefaction by upregulating antioxidant defenses and reducing mitochondrial ROS levels.
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Affiliation(s)
| | - Katie E Fink
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Joe M McCord
- Division of Pulmonary Sciences and Critical Care Medicine Research, University of Colorado at Denver - Anschutz Medical Campus, Aurora, Colorado
| | - Julian H Lombard
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
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10
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Zhang D, Rennhack J, Andrechek ER, Rockwell CE, Liby KT. Identification of an Unfavorable Immune Signature in Advanced Lung Tumors from Nrf2-Deficient Mice. Antioxid Redox Signal 2018; 29:1535-1552. [PMID: 29634345 PMCID: PMC6421995 DOI: 10.1089/ars.2017.7201] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIMS Activation of the nuclear factor (erythroid-derived 2)-like 2 (Nrf2) pathway in normal cells inhibits carcinogenesis, whereas constitutive activation of Nrf2 in cancer cells promotes tumor growth and chemoresistance. However, the effects of Nrf2 activation in immune cells during lung carcinogenesis are poorly defined and could either promote or inhibit cancer growth. Our studies were designed to evaluate tumor burden and identify immune cell populations in the lungs of Nrf2 knockout (KO) versus wild-type (WT) mice challenged with vinyl carbamate. RESULTS Nrf2 KO mice developed lung tumors earlier than the WT mice and exhibited more and larger tumors over time, even at late stages. T cell populations were lower in the lungs of Nrf2 KO mice, whereas tumor-promoting macrophages and myeloid-derived suppressor cells were elevated in the lungs and spleen, respectively, of Nrf2 KO mice relative to WT mice. Moreover, 34 immune response genes were significantly upregulated in tumors from Nrf2 KO mice, especially a series of cytokines (Cxcl1, Csf1, Ccl9, Cxcl12, etc.) and major histocompatibility complex antigens that promote tumor growth. INNOVATION Our studies discovered a novel immune signature, characterized by the infiltration of tumor-promoting immune cells, elevated cytokines, and increased expression of immune response genes in the lungs and tumors of Nrf2 KO mice. A complementary profile was also found in lung cancer patients, supporting the clinical significance of our findings. CONCLUSION Overall, our results confirmed a protective role for Nrf2 in late-stage carcinogenesis and, unexpectedly, suggest that activation of Nrf2 in immune cells may be advantageous for preventing or treating lung cancer. Antioxid. Redox Signal.
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Affiliation(s)
- Di Zhang
- 1 Department of Pharmacology and Toxicology, Michigan State University , East Lansing, Michigan
| | - Jonathan Rennhack
- 2 Department of Physiology, Michigan State University , East Lansing, Michigan
| | - Eran R Andrechek
- 2 Department of Physiology, Michigan State University , East Lansing, Michigan
| | - Cheryl E Rockwell
- 1 Department of Pharmacology and Toxicology, Michigan State University , East Lansing, Michigan
| | - Karen T Liby
- 1 Department of Pharmacology and Toxicology, Michigan State University , East Lansing, Michigan
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11
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Matzinger M, Fischhuber K, Heiss EH. Activation of Nrf2 signaling by natural products-can it alleviate diabetes? Biotechnol Adv 2018; 36:1738-1767. [PMID: 29289692 PMCID: PMC5967606 DOI: 10.1016/j.biotechadv.2017.12.015] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 12/19/2017] [Accepted: 12/26/2017] [Indexed: 02/06/2023]
Abstract
Type 2 diabetes mellitus (DM) has reached pandemic proportions and effective prevention strategies are wanted. Its onset is accompanied by cellular distress, the nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor boosting cytoprotective responses, and many phytochemicals activate Nrf2 signaling. Thus, Nrf2 activation by natural products could presumably alleviate DM. We summarize function, regulation and exogenous activation of Nrf2, as well as diabetes-linked and Nrf2-susceptible forms of cellular stress. The reported amelioration of insulin resistance, β-cell dysfunction and diabetic complications by activated Nrf2 as well as the status quo of Nrf2 in precision medicine for DM are reviewed.
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Affiliation(s)
- Manuel Matzinger
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
| | - Katrin Fischhuber
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
| | - Elke H Heiss
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria.
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12
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Wang Y, Li L, Wang Y, Zhu X, Jiang M, Song E, Song Y. New application of the commercial sweetener rebaudioside a as a hepatoprotective candidate: Induction of the Nrf2 signaling pathway. Eur J Pharmacol 2018; 822:128-137. [PMID: 29355553 DOI: 10.1016/j.ejphar.2018.01.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/10/2018] [Accepted: 01/15/2018] [Indexed: 10/18/2022]
Abstract
A large population of drug candidates have failed "from bench to bed" due to unwanted toxicities. We intend to develop an alternative approach for drug discovery, that is, to seek candidates from "safe" compounds. Rebaudioside A (Reb-A) is an approved commercial sweetener from Stevia rebaudiana Bertoni. We found that Reb-A protects against carbon tetrachloride (CCl4)-induced oxidative injury in human liver hepatocellular carcinoma (HepG2) cells. Reb-A showed antioxidant activity on reducing cellular reactive oxygen species and malondialdehyde levels while increasing glutathione levels and superoxide dismutase and catalase activities. Reb-A treatment induced nuclear factor erythroid-derived 2-like 2 (Nrf2) activation and antioxidant response element activity, as well as the expression of heme oxygenase-1 (HO-1) and NAD(P)H quinone oxidoreductase 1 (NQO1). Further mechanistic studies indicated that c-Jun N-terminal kinase (JNK), extracellular signal-regulated protein kinase (ERK), mitogen-active protein kinase (MAPK) and protein kinase C epsilon (PKCε) signaling was upregulated. Thus, the present in vitro study conclusively demonstrated that Reb-A is an activator of Nrf2 and is a potential candidate hepatoprotective agent. More importantly, the present study illustrated that seeking drug candidates from "safe" compounds is a promising strategy.
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Affiliation(s)
- Yuxin Wang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Linyao Li
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Yawen Wang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Xiaokang Zhu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Mingdong Jiang
- Department of Radiation Oncology, The Ninth People's Hospital of Chongqing, Chongqing 400700, People's Republic of China.
| | - Erqun Song
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Yang Song
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China.
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13
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Jang HJ, Hong EM, Kim M, Kim JH, Jang J, Park SW, Byun HW, Koh DH, Choi MH, Kae SH, Lee J. Simvastatin induces heme oxygenase-1 via NF-E2-related factor 2 (Nrf2) activation through ERK and PI3K/Akt pathway in colon cancer. Oncotarget 2018; 7:46219-46229. [PMID: 27323826 PMCID: PMC5216792 DOI: 10.18632/oncotarget.10078] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 05/29/2016] [Indexed: 12/30/2022] Open
Abstract
Statin has been known not only as their cholesterol-lowering action but also on their pleiotropic effects including anti-inflammatory and anti-oxidant as well as anti-cancer effect. Nrf2 (NF-E2-related factor 2) is a transcription factor to activate cellular antioxidant response to oxidative stress. There are little known whether statins affect activation of Nrf2 and Nrf2 signaling pathway in colon cancer cells. We investigated whether simvastatin stimulates the expression of Nrf2 and nuclear translocation of Nrf2 and which signal pathway is involved in the expression of Nrf2 and antioxidant enzymes. We investigated the effect of simvastatin on the expression of Nrf2 and nuclear translocation of Nrf2 in two human colon cancer cell lines, HT-29 and HCT 116 through cell proliferation assay, Western blotting and immunocytochemical analysis. We evaluated which signal pathway such as ERK or PI3K pathway affect Nrf2 activation and whether simvastatin induces antioxidant enzymes (heme oxygenase-1 (HO-1), NAD(P)H: quinine oxidoreductase 1 (NQO1), γ-glutamate-cysteine ligase catalytic subunit (GCLC)). We demonstrated simvastatin-induced dose-dependent up-regulation of Nrf2 expression and stimulated Nrf2 nuclear translocation in colon cancer cells. We also demonstrated that simvastatin-induced anti-oxidant enzymes (HO-1, NQO1, and GCLC) in HT-29 and HCT 116 cells. PI3K/Akt inhibitor (LY294002) and ERK inhibitor (PD98059) suppressed simvastatin-induced Nrf2 and HO-1 expression in both HT-29 and HCT 116 cells. This study shows that simvastatin induces the activation and nuclear translocation of Nrf2 and the expression of various anti-oxidant enzymes via ERK and PI3K/Akt pathway in colon cancer cells.
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Affiliation(s)
- Hyun Joo Jang
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Eun Mi Hong
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Mikang Kim
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Jae Hyun Kim
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Juah Jang
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Se Woo Park
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Hyun Wu Byun
- Division of Gastroenterology, Department of Internal Medicine, Hangang Sacred Heart Hospital, Hallym University School of Medicine, Seoul, Korea
| | - Dong Hee Koh
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Min Ho Choi
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Sea Hyub Kae
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
| | - Jin Lee
- Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Gyeonggi do, Korea
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14
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Bereczki D, Balla J, Bereczki D. Heme Oxygenase-1: Clinical Relevance in Ischemic Stroke. Curr Pharm Des 2018; 24:2229-2235. [PMID: 30014798 PMCID: PMC6302555 DOI: 10.2174/1381612824666180717101104] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/02/2018] [Accepted: 07/12/2018] [Indexed: 02/07/2023]
Abstract
Stroke is the second-leading cause of death and a leading cause of serious long-term disability worldwide, with an increasing global burden due to the growing and aging population. However, strict eligibility criteria for current treatment opportunities make novel therapeutic approaches desirable. Oxidative stress plays a pivotal role during cerebral ischemia, eventually leading to neuronal injury and cell death. The significant correlation between redox imbalance and ischemic stroke has led to various treatment strategies targeting the endogenous antioxidant system in order to ameliorate the adverse prognosis in patients with cerebral infarction. One of the most extensively investigated cellular defense pathway in this regard is the Nrf2-heme oxygenase-1 (HO-1) axis. In this review, our aim is to focus on the potential clinical relevance of targeting the HO-1 pathway in ischemic stroke.
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Affiliation(s)
- Daniel Bereczki
- Address correspondence to this author at the Department of Neurology, Medical Centre, Hungarian Defence Forces, Róbert Károly krt. 44., Budapest, H-1134, Hungary; Tel: +36-70-701-0671; E-mail:
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15
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Lin CC, Yang CC, Chen YW, Hsiao LD, Yang CM. Arachidonic Acid Induces ARE/Nrf2-Dependent Heme Oxygenase-1 Transcription in Rat Brain Astrocytes. Mol Neurobiol 2017; 55:3328-3343. [PMID: 28497199 DOI: 10.1007/s12035-017-0590-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 04/28/2017] [Indexed: 12/21/2022]
Abstract
Arachidonic acid (AA) is a major product of phospholipid hydrolysis catalyzed by phospholipase A2 during neurodegenerative diseases. AA exerts as a second messenger to regulate various signaling components which may be involved in different pathophysiological processes. Astrocytes are the main types of CNS resident cells which maintain and support the physiological function of brain. AA has been shown to induce ROS generation through activation of NADPH oxidases (Noxs) which may play a key role in the expression of heme oxygenase-1 (HO-1). Therefore, this study was designed to investigate the mechanisms underlying AA-induced HO-1 expression in rat brain astrocytes (RBA-1). We found that AA induced HO-1 protein and mRNA expression and promoter activity in RBA-1, which was mediated through the synthesis of 15-deoxy-Δ12,14-prostaglandin D2-activated peroxisome proliferator-activated receptor-γ (PPARγ) receptors. This note was confirmed by transfection with PPARγ small interfering RNAs (siRNA) which attenuated the AA-mediated responses. AA-induced HO-1 expression was mediated through Nox/ROS generation, which was inhibited by Nox inhibitors (diphenyleneiodonium and apocynin) and ROS scavengers (N-acetyl cysteine). Moreover, AA-induced HO-1 expression was mediated through phosphorylation of Src, Pyk2, platelet-derived growth factor, PI3K/Akt, and ERK1/2 which were inhibited by the pharmacological inhibitors including PP1, PF431396, AG1296, LY294002, and U0126 or by transfection with respective siRNAs. AA-enhanced Nrf2 expression and HO-1 promoter activity was inhibited by transfection with Nrf2 siRNA or by these pharmacological inhibitors. Furthermore, chromatin immunoprecipitation assay confirmed that Nrf2 and PPARγ were associated with the proximal antioxidant response element (ARE)-binding site on HO-1 promoter, suggesting that Nrf2/PPARγ are key transcription factors modulating HO-1 expression. AA-induced ARE promoter activity was also reduced by these pharmacological inhibitors. These findings suggested that AA increases formation of Nrf2 and PPARγ complex and binding with ARE1 binding site through Src, Pyk2, PI3K/Akt, and ERK1/2, which further induced HO-1 expression in RBA-1 cells.
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Affiliation(s)
- Chih-Chung Lin
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkou, and College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Chien-Chung Yang
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital, Linkou, Kwei-San, Tao-Yuan, Taiwan.,Department of Physiology and Pharmacology and Health Aging Research Center, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Yu-Wen Chen
- Department of Physiology and Pharmacology and Health Aging Research Center, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Li-Der Hsiao
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkou, and College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Chuen-Mao Yang
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkou, and College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan. .,Department of Physiology and Pharmacology and Health Aging Research Center, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan. .,Research Center for Industry of Human Ecology, Research Center for Chinese Herbal Medicine, and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Tao-Yuan, Taiwan. .,Department of Physiology and Pharmacology, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, Taiwan.
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16
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Nègre-Salvayre A, Augé N, Camaré C, Bacchetti T, Ferretti G, Salvayre R. Dual signaling evoked by oxidized LDLs in vascular cells. Free Radic Biol Med 2017; 106:118-133. [PMID: 28189852 DOI: 10.1016/j.freeradbiomed.2017.02.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 01/30/2017] [Accepted: 02/02/2017] [Indexed: 12/12/2022]
Abstract
The oxidative theory of atherosclerosis relies on the modification of low density lipoproteins (LDLs) in the vascular wall by reactive oxygen species. Modified LDLs, such as oxidized LDLs, are thought to participate in the formation of early atherosclerotic lesions (accumulation of foam cells and fatty streaks), whereas their role in advanced lesions and atherothrombotic events is more debated, because antioxidant supplementation failed to prevent coronary disease events and mortality in intervention randomized trials. As oxidized LDLs and oxidized lipids are present in atherosclerotic lesions and are able to trigger cell signaling on cultured vascular cells and macrophages, it has been proposed that they could play a role in atherogenesis and atherosclerotic vascular remodeling. Oxidized LDLs exhibit dual biological effects, which are dependent on extent of lipid peroxidation, nature of oxidized lipids (oxidized phospholipids, oxysterols, malondialdehyde, α,β-unsaturated hydroxyalkenals), concentration of oxidized LDLs and uptake by scavenger receptors (e.g. CD36, LOX-1, SRA) that signal through different transduction pathways. Moderate concentrations of mildly oxidized LDLs are proinflammatory and trigger cell migration and proliferation, whereas higher concentrations induce cell growth arrest and apoptosis. The balance between survival and apoptotic responses evoked by oxidized LDLs depends on cellular systems that regulate the cell fate, such as ceramide/sphingosine-1-phosphate rheostat, endoplasmic reticulum stress, autophagy and expression of pro/antiapoptotic proteins. In vivo, the intimal concentration of oxidized LDLs depends on the influx (hypercholesterolemia, endothelial permeability), residence time and lipid composition of LDLs, oxidative stress intensity, induction of defense mechanisms (antioxidant systems, heat shock proteins). As a consequence, the local cellular responses to oxidized LDLs may stimulate inflammatory or anti-inflammatory pathways, angiogenic or antiangiogenic responses, survival or apoptosis, thereby contributing to plaque growth, instability, complication (intraplaque hemorrhage, proteolysis, calcification, apoptosis) and rupture. Finally, these dual properties suggest that oxLDLs could be implicated at each step of atherosclerosis development, from early fatty streaks to advanced lesions, depending on the nature and concentration of their oxidized lipid content.
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Affiliation(s)
| | | | - Caroline Camaré
- Inserm UMR-1048, France; University of Toulouse, Faculty of Medicine, Biochemistry Dept, Toulouse, France; CHU Toulouse, Rangueil, Toulouse, France
| | | | | | - Robert Salvayre
- Inserm UMR-1048, France; University of Toulouse, Faculty of Medicine, Biochemistry Dept, Toulouse, France; CHU Toulouse, Rangueil, Toulouse, France.
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17
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Otterbein LE, Foresti R, Motterlini R. Heme Oxygenase-1 and Carbon Monoxide in the Heart: The Balancing Act Between Danger Signaling and Pro-Survival. Circ Res 2017; 118:1940-1959. [PMID: 27283533 DOI: 10.1161/circresaha.116.306588] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 05/02/2016] [Indexed: 12/22/2022]
Abstract
Understanding the processes governing the ability of the heart to repair and regenerate after injury is crucial for developing translational medical solutions. New avenues of exploration include cardiac cell therapy and cellular reprogramming targeting cell death and regeneration. An attractive possibility is the exploitation of cytoprotective genes that exist solely for self-preservation processes and serve to promote and support cell survival. Although the antioxidant and heat-shock proteins are included in this category, one enzyme that has received a great deal of attention as a master protective sentinel is heme oxygenase-1 (HO-1), the rate-limiting step in the catabolism of heme into the bioactive signaling molecules carbon monoxide, biliverdin, and iron. The remarkable cardioprotective effects ascribed to heme oxygenase-1 are best evidenced by its ability to regulate inflammatory processes, cellular signaling, and mitochondrial function ultimately mitigating myocardial tissue injury and the progression of vascular-proliferative disease. We discuss here new insights into the role of heme oxygenase-1 and heme on cardiovascular health, and importantly, how they might be leveraged to promote heart repair after injury.
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Affiliation(s)
- Leo E Otterbein
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Roberta Foresti
- Inserm, U955, Equipe 12, Créteil, 94000, France.,University Paris Est, Faculty of Medicine, Créteil, 94000, France
| | - Roberto Motterlini
- Inserm, U955, Equipe 12, Créteil, 94000, France.,University Paris Est, Faculty of Medicine, Créteil, 94000, France
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18
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Tsai CY, Wen SY, Cheng SY, Wang CH, Yang YC, Viswanadha VP, Huang CY, Kuo WW. Nrf2 Activation as a Protective Feedback to Limit Cell Death in High Glucose-Exposed Cardiomyocytes. J Cell Biochem 2017; 118:1659-1669. [PMID: 27859591 DOI: 10.1002/jcb.25785] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/07/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Cheng-Yen Tsai
- Department of Pediatrics; China Medical University Beigang Hospital; Yunlin 651 Taiwan,ROC
- School of Chinese Medicine; College of Chinese Medicine; China Medical University; Taichung 40402 Taiwan
| | - Su-Ying Wen
- Department of Dermatology; Taipei City Hospital; Renai Branch; Taipei Taiwan
- Center for General Education; Mackay Junior College of Medicine; Nursing, and Management; Taipei Taiwan
| | - Shi-Yann Cheng
- Department of Medical Education and Research and Department of Obstetrics and Gynecology; China Medical University Beigang Hospital; Yunlin 651 Taiwan,ROC
- Department of Obstetrics and Gynecology; China Medical University An Nan Hospital; Yunlin 651 Taiwan,ROC
- Obstetrics and Gynecology; School of Medicine; China Medical University; Taichung Taiwan
| | - Chung-Hsing Wang
- Department of Pediatrics; China Medical University Hospital; Taichung 404 Taiwan,ROC
| | - Yao-Chih Yang
- Department of Biological Science and Technology; College of Biopharmaceutical and Food Sciences; China Medical University; Taichung 404 Taiwan,ROC
| | | | - Chih-Yang Huang
- Graduate Institute of Basic Medical Science; China Medical University; Taichung 404 Taiwan,ROC
- Department of Chinese Medicine; China Medical University Hospital; Taichung 404 Taiwan,ROC
- Department of Health and Nutrition Biotechnology; Asia University; Taichung 413 Taiwan,ROC
| | - Wei-Wen Kuo
- Department of Biological Science and Technology; College of Biopharmaceutical and Food Sciences; China Medical University; Taichung 404 Taiwan,ROC
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19
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Chistiakov DA, Orekhov AN, Bobryshev YV. Treatment of cardiovascular pathology with epigenetically active agents: Focus on natural and synthetic inhibitors of DNA methylation and histone deacetylation. Int J Cardiol 2016; 227:66-82. [PMID: 27852009 DOI: 10.1016/j.ijcard.2016.11.204] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/06/2016] [Indexed: 12/20/2022]
Abstract
Cardiovascular disease (CVD) retains a leadership as a major cause of human death worldwide. Although a substantial progress was attained in the development of cardioprotective and vasculoprotective drugs, a search for new efficient therapeutic strategies and promising targets is under way. Modulation of epigenetic CVD mechanisms through administration epigenetically active agents is one of such new approaches. Epigenetic mechanisms involve heritable changes in gene expression that are not linked to the alteration of DNA sequence. Pathogenesis of CVDs is associated with global genome-wide changes in DNA methylation and histone modifications. Epigenetically active compounds that influence activity of epigenetic modulators such as DNA methyltransferases (DNMTs), histone acetyltransferases, histone deacetylases (HDACs), etc. may correct these pathogenic changes in the epigenome and therefore be used for CVD therapy. To date, many epigenetically active natural substances (such as polyphenols and flavonoids) and synthetic compounds such as DNMT inhibitors or HDAC inhibitors are known. Both native and chemical DNMT and HDAC inhibitors possess a wide range of cytoprotective activities such as anti-inflammatory, antioxidant, anti-apoptotic, anti-anfibrotic, and anti-hypertrophic properties, which are beneficial of treatment of a variety of CVDs. However, so far, only synthetic DNMT inhibitors enter clinical trials while synthetic HDAC inhibitors are still under evaluation in preclinical studies. In this review, we consider epigenetic mechanisms such as DNA methylation and histone modifications in cardiovascular pathology and the epigenetics-based therapeutic approaches focused on the implementation of DNMT and HDAC inhibitors.
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Affiliation(s)
- Dimitry A Chistiakov
- Department of Molecular Genetic Diagnostics and Cell Biology, Division of Laboratory Medicine, Institute of Pediatrics, Research Center for Children's Health, 119991, Moscow, Russia
| | - Alexander N Orekhov
- Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, Moscow, 125315, Russia; Department of Biophysics, Biological Faculty, Moscow State University, Moscow, 119991, Russia; Institute for Atherosclerosis Research, Skolkovo Innovative Center, Moscow, 121609, Russia; National Research Center for Preventive Medicine, Moscow, 101000, Russia
| | - Yuri V Bobryshev
- Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, Moscow, 125315, Russia; Faculty of Medicine, School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia; School of Medicine, University of Western Sydney, Campbelltown, NSW 2560, Australia.
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20
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Maltese G, Psefteli PM, Rizzo B, Srivastava S, Gnudi L, Mann GE, Siow RCM. The anti-ageing hormone klotho induces Nrf2-mediated antioxidant defences in human aortic smooth muscle cells. J Cell Mol Med 2016; 21:621-627. [PMID: 27696667 PMCID: PMC5323877 DOI: 10.1111/jcmm.12996] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 08/16/2016] [Indexed: 12/17/2022] Open
Abstract
Vascular ageing in conditions such as atherosclerosis, diabetes and chronic kidney disease, is associated with the activation of the renin angiotensin system (RAS) and diminished expression of antioxidant defences mediated by the transcription factor nuclear factor erythroid 2‐related factor 2 (Nrf2). The anti‐ageing hormone klotho promotes longevity and protects against cardiovascular and renal diseases. Klotho has been shown to activate Nrf2 and attenuate oxidative damage in neuronal cells, however, the mechanisms by which it protects against vascular smooth muscle cell VSMC dysfunction elicited by Angiotensin II (AngII) remain to be elucidated. AngII contributes to vascular ageing and atherogenesis by enhancing VSMC oxidative stress, senescence and apoptosis. This study demonstrates that soluble klotho (1 nM, 24 hrs) significantly induces expression of Nrf2 and the antioxidant enzymes haeme oxygenase (HO‐1) and peroxiredoxin‐1 (Prx‐1) and enhances glutathione levels in human aortic smooth muscle cells (HASMC). Silencing of Nrf2 attenuated the induction of HO‐1 and Prx‐1 expression by soluble klotho. Furthermore, soluble klotho protected against AngII‐mediated HASMC apoptosis and senescence via activation of Nrf2. Thus, our findings highlight a novel Nrf2‐mediated mechanism underlying the protective actions of soluble klotho in HAMSC. Targeting klotho may thus represent a therapeutic strategy against VSMC dysfunction and cardiovascular ageing.
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Affiliation(s)
- Giuseppe Maltese
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Paraskevi-Maria Psefteli
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Benedetta Rizzo
- Department for Life Quality Studies, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Salil Srivastava
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Luigi Gnudi
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Giovanni E Mann
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Richard C M Siow
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, London, UK
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21
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Zhang X, He H, Liang D, Jiang Y, Liang W, Chi ZH, Ma J. Protective Effects of Berberine on Renal Injury in Streptozotocin (STZ)-Induced Diabetic Mice. Int J Mol Sci 2016; 17:ijms17081327. [PMID: 27529235 PMCID: PMC5000724 DOI: 10.3390/ijms17081327] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/03/2016] [Accepted: 08/01/2016] [Indexed: 12/19/2022] Open
Abstract
Diabetic nephropathy (DN) is a serious diabetic complication with renal hypertrophy and expansion of extracellular matrices in renal fibrosis. Epithelial-to-mesenchymal transition (EMT) of renal tubular epithelial cells may be involved in the main mechanism. Berberine (BBR) has been shown to have antifibrotic effects in liver, kidney and lung. However, the mechanism of cytoprotective effects of BBR in DN is still unclear. In this study, we investigated the curative effects of BBR on tubulointerstitial fibrosis in streptozotocin (STZ)-induced diabetic mice and the high glucose (HG)-induced EMT in NRK 52E cells. We found that BBR treatment attenuated renal fibrosis by activating the nuclear factor-erythroid 2-related factor 2 (Nrf2) signaling pathway in the diabetic kidneys. Further revealed that BBR abrogated HG-induced EMT and oxidative stress in relation not only with the activation of Nrf2 and two Nrf2-targeted antioxidative genes (NQO-1 and HO-1), but also with the suppressing the activation of TGF-β/Smad signaling pathway. Importantly, knockdown Nrf2 with siRNA not only abolished the BBR-induced expression of HO-1 and NQO-1 but also removed the inhibitory effect of BBR on HG-induced activation of TGF-β/Smad signaling as well as the anti-fibrosis effects. The data from present study suggest that BBR can ameliorate tubulointerstitial fibrosis in DN by activating Nrf2 pathway and inhibiting TGF-β/Smad/EMT signaling activity.
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Affiliation(s)
- Xiuli Zhang
- Department of Nephrology, Benxi Center Hospital, 29 Victory Road, Benxi 117000, Liaoning, China.
- Science Experiment Center, Benxi Center Hospital, Benxi 117000, Liaoning, China.
- Key Laboratory of Medical Cell Biology of Ministry of Education, China Medical University, Shenyang 110001, Liaoning, China.
| | - Hui He
- Science Experiment Center, Benxi Center Hospital, Benxi 117000, Liaoning, China.
| | - Dan Liang
- Troops of 95935 Unit, Haerbin 150111, Heilongjiang, China.
| | - Yan Jiang
- Science Experiment Center, Benxi Center Hospital, Benxi 117000, Liaoning, China.
| | - Wei Liang
- Science Experiment Center, Benxi Center Hospital, Benxi 117000, Liaoning, China.
| | - Zhi-Hong Chi
- Department of pathophysiology, China Medical University, Shenyang 110001, Liaoning, China.
| | - Jianfei Ma
- Department of Nephrology, the First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning, China.
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22
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Zeya B, Arjuman A, Chandra NC. Lectin-like Oxidized Low-Density Lipoprotein (LDL) Receptor (LOX-1): A Chameleon Receptor for Oxidized LDL. Biochemistry 2016; 55:4437-44. [DOI: 10.1021/acs.biochem.6b00469] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bushra Zeya
- Department
of Biochemistry, All India Institute of Medical Sciences, Patna 801507, India
| | - Albina Arjuman
- Division of P&I, Indian Council of Medical Research, New Delhi 110 029, India
| | - Nimai Chand Chandra
- Department
of Biochemistry, All India Institute of Medical Sciences, Patna 801507, India
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Li C, Zhang WJ, Frei B. Quercetin inhibits LPS-induced adhesion molecule expression and oxidant production in human aortic endothelial cells by p38-mediated Nrf2 activation and antioxidant enzyme induction. Redox Biol 2016; 9:104-113. [PMID: 27454768 PMCID: PMC4961307 DOI: 10.1016/j.redox.2016.06.006] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 06/21/2016] [Accepted: 06/25/2016] [Indexed: 01/26/2023] Open
Abstract
Atherosclerosis, the underlying cause of ischemic heart disease and stroke, is an inflammatory disease of arteries in a hyperlipidemic milieu. Endothelial expression of cellular adhesion molecules, such as endothelial-leukocyte adhesion molecule-1 (E-selectin) and intercellular adhesion molecule-1 (ICAM-1), plays a critical role in the initiation and progression of atherosclerosis. The dietary flavonoid, quercetin, has been reported to inhibit expression of cellular adhesion molecules, but the underlying mechanisms are incompletely understood. In this study, we found that quercetin dose-dependently (5–20 µM) inhibits lipopolysaccharide (LPS)-induced mRNA and protein expression of E-selectin and ICAM-1 in human aortic endothelial cells (HAEC). Incubation of HAEC with quercetin also significantly reduced LPS-induced oxidant production, but did not inhibit activation of the nuclear factor-kappaB (NF-κB). Furthermore, quercetin induced activation of the nuclear factor erythroid 2-related factor 2 (Nrf2) and subsequent mRNA and protein expression of the antioxidant enzymes, heme oxygenase-1 (HO-1), NAD(P)H dehydrogenase, quinone 1, and glutamate-cysteine ligase. The induction of Nrf2 and antioxidant enzymes was partly inhibited by the p38 mitogen-activated protein kinase (p38) inhibitor, SB203580. Our results suggest that quercetin suppresses LPS-induced oxidant production and adhesion molecule expression by inducing Nrf2 activation and antioxidant enzyme expression, which is partially mediated by p38; and the inhibitory effect of quercetin on adhesion molecule expression is not due to inhibition of NF-κB activation, but instead due to antioxidant-independent effects of HO-1. Quercetin inhibits LPS-induced oxidant production and adhesion molecule expression. Quercetin activates p38 MAP kinase and Nrf2, upregulating heme oxygenase-1 (HO-1). HO-1 rather than NF-κB may account for quercetin’s anti-inflammatory effects.
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Affiliation(s)
- Chuan Li
- Linus Pauling Institute and Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA
| | - Wei-Jian Zhang
- Linus Pauling Institute and Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA
| | - Balz Frei
- Linus Pauling Institute and Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA.
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Johansson I, Monsen VT, Pettersen K, Mildenberger J, Misund K, Kaarniranta K, Schønberg S, Bjørkøy G. The marine n-3 PUFA DHA evokes cytoprotection against oxidative stress and protein misfolding by inducing autophagy and NFE2L2 in human retinal pigment epithelial cells. Autophagy 2016; 11:1636-51. [PMID: 26237736 PMCID: PMC4590664 DOI: 10.1080/15548627.2015.1061170] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Accumulation and aggregation of misfolded proteins is a hallmark of several diseases collectively known as proteinopathies. Autophagy has a cytoprotective role in diseases associated with protein aggregates. Age-related macular degeneration (AMD) is the most common neurodegenerative eye disease that evokes blindness in elderly. AMD is characterized by degeneration of retinal pigment epithelial (RPE) cells and leads to loss of photoreceptor cells and central vision. The initial phase associates with accumulation of intracellular lipofuscin and extracellular deposits called drusen. Epidemiological studies have suggested an inverse correlation between dietary intake of marine n-3 polyunsaturated fatty acids (PUFAs) and the risk of developing neurodegenerative diseases, including AMD. However, the disease-preventive mechanism(s) mobilized by n-3 PUFAs is not completely understood. In human retinal pigment epithelial cells we find that physiologically relevant doses of the n-3 PUFA docosahexaenoic acid (DHA) induce a transient increase in cellular reactive oxygen species (ROS) levels that activates the oxidative stress response regulator NFE2L2/NRF2 (nuclear factor, erythroid derived 2, like 2). Simultaneously, there is a transient increase in intracellular protein aggregates containing SQSTM1/p62 (sequestosome 1) and an increase in autophagy. Pretreatment with DHA rescues the cells from cell cycle arrest induced by misfolded proteins or oxidative stress. Cells with a downregulated oxidative stress response, or autophagy, respond with reduced cell growth and survival after DHA supplementation. These results suggest that DHA both induces endogenous antioxidants and mobilizes selective autophagy of misfolded proteins. Both mechanisms could be relevant to reduce the risk of developing aggregate-associate diseases such as AMD.
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Affiliation(s)
- Ida Johansson
- a Department of Laboratory Medicine ; Children's and Women's Health; Faculty of Medicine; Norwegian University of Science and Technology ; Trondheim , Norway.,b Department of Technology ; University College of Sør-Trøndelag ; Trondheim , Norway.,c Centre of Molecular Inflammation Research and Department of Cancer Research and Molecular Medicine ; Norwegian University of Science and Technology ; Trondheim , Norway
| | - Vivi Talstad Monsen
- a Department of Laboratory Medicine ; Children's and Women's Health; Faculty of Medicine; Norwegian University of Science and Technology ; Trondheim , Norway
| | - Kristine Pettersen
- a Department of Laboratory Medicine ; Children's and Women's Health; Faculty of Medicine; Norwegian University of Science and Technology ; Trondheim , Norway.,b Department of Technology ; University College of Sør-Trøndelag ; Trondheim , Norway.,c Centre of Molecular Inflammation Research and Department of Cancer Research and Molecular Medicine ; Norwegian University of Science and Technology ; Trondheim , Norway
| | - Jennifer Mildenberger
- b Department of Technology ; University College of Sør-Trøndelag ; Trondheim , Norway.,c Centre of Molecular Inflammation Research and Department of Cancer Research and Molecular Medicine ; Norwegian University of Science and Technology ; Trondheim , Norway.,d Department of Cancer Research and Molecular Medicine ; Faculty of Medicine; Norwegian University of Science and Technology ; Trondheim , Norway
| | - Kristine Misund
- d Department of Cancer Research and Molecular Medicine ; Faculty of Medicine; Norwegian University of Science and Technology ; Trondheim , Norway.,e KG Jebsen Center for Myeloma Research; Norwegian University of Science and Technology ; Trondheim , Norway
| | - Kai Kaarniranta
- f Department of Ophthalmology ; Institute of Clinical Medicine; University of Eastern Finland ; Kuopio , Finland.,g Department of Ophthalmology ; Kuopio University Hospital ; Kuopio , Finland
| | - Svanhild Schønberg
- a Department of Laboratory Medicine ; Children's and Women's Health; Faculty of Medicine; Norwegian University of Science and Technology ; Trondheim , Norway
| | - Geir Bjørkøy
- b Department of Technology ; University College of Sør-Trøndelag ; Trondheim , Norway.,c Centre of Molecular Inflammation Research and Department of Cancer Research and Molecular Medicine ; Norwegian University of Science and Technology ; Trondheim , Norway
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25
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Vurusaner B, Leonarduzzi G, Gamba P, Poli G, Basaga H. Oxysterols and mechanisms of survival signaling. Mol Aspects Med 2016; 49:8-22. [PMID: 27017897 DOI: 10.1016/j.mam.2016.02.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 02/27/2016] [Accepted: 02/29/2016] [Indexed: 12/19/2022]
Abstract
Oxysterols, a family of oxidation products of cholesterol, are increasingly drawing attention of scientists to their multifaceted biochemical properties, several of them of clear relevance to human pathophysiology. Taken up by cells through both vesicular and non-vesicular ways or often generated intracellularly, oxysterols contribute to modulate not only the inflammatory and immunological response but also cell viability, metabolism and function by modulating several signaling pathways. Moreover, they have been recognized as elective ligands for the most important nuclear receptors. The outcome of such a complex network of intracellular reactions promoted by these cholesterol oxidation products appears to be largely dependent not only on the type of cells, the dynamic conditions of the cellular and tissue environment but also on the concentration of the oxysterols. Here focus has been given to the cascade of molecular events exerted by relatively low concentrations of certain oxysterols that elicit survival and functional signals in the cells, with the aim to contribute to further expand the knowledge about the biological and physiological potential of the biochemical reactions triggered and modulated by oxysterols.
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Affiliation(s)
- Beyza Vurusaner
- Biological Sciences and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli-Tuzla, 34956 Istanbul, Turkey
| | | | - Paola Gamba
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Giuseppe Poli
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy.
| | - Huveyda Basaga
- Biological Sciences and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli-Tuzla, 34956 Istanbul, Turkey.
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26
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Chapple SJ, Keeley TP, Mastronicola D, Arno M, Vizcay-Barrena G, Fleck R, Siow RCM, Mann GE. Bach1 differentially regulates distinct Nrf2-dependent genes in human venous and coronary artery endothelial cells adapted to physiological oxygen levels. Free Radic Biol Med 2016; 92:152-162. [PMID: 26698668 DOI: 10.1016/j.freeradbiomed.2015.12.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 12/11/2015] [Accepted: 12/12/2015] [Indexed: 12/18/2022]
Abstract
The effects of physiological oxygen tension on Nuclear Factor-E2-Related Factor 2 (Nrf2)-regulated redox signaling remain poorly understood. We report the first study of Nrf2-regulated signaling in human primary endothelial cells (EC) adapted long-term to physiological O2 (5%). Adaptation of EC to 5% O2 had minimal effects on cell ultrastructure, viability, basal redox status or HIF1-α expression. Affymetrix array profiling and subsequent qPCR/protein validation revealed that induction of select Nrf2 target genes, HO-1 and NQO1, was significantly attenuated in cells adapted to 5% O2, despite nuclear accumulation and DNA binding of Nrf2. Diminished HO-1 induction under 5% O2 was stimulus independent and reversible upon re-adaptation to air or silencing of the Nrf2 repressor Bach1, notably elevated under 5% O2. Induction of GSH-related genes xCT and GCLM were oxygen and Bach1-insensitive during long-term culture under 5% O2, providing the first evidence that genes related to GSH synthesis mediate protection afforded by Nrf2-Keap1 defense pathway in cells adapted to physiological O2 levels encountered in vivo.
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Affiliation(s)
- Sarah J Chapple
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Thomas P Keeley
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Daniela Mastronicola
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Matthew Arno
- Genomics Centre, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Gema Vizcay-Barrena
- Centre for Ultrastructural Imaging, King's College London, London SE1 9NH, UK
| | - Roland Fleck
- Centre for Ultrastructural Imaging, King's College London, London SE1 9NH, UK
| | - Richard C M Siow
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Giovanni E Mann
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK.
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27
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Vurusaner B, Gamba P, Gargiulo S, Testa G, Staurenghi E, Leonarduzzi G, Poli G, Basaga H. Nrf2 antioxidant defense is involved in survival signaling elicited by 27-hydroxycholesterol in human promonocytic cells. Free Radic Biol Med 2016; 91:93-104. [PMID: 26689473 DOI: 10.1016/j.freeradbiomed.2015.12.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 12/04/2015] [Accepted: 12/07/2015] [Indexed: 01/08/2023]
Abstract
Cholesterol oxidation products such as oxysterols are considered critical factors in the atherosclerotic plaque formation since they induce oxidative stress, inflammation and apoptotic cell death. 27-hydroxycholesterol (27-OH) is one of the most represented oxysterols in atherosclerotic lesions. We recently showed that relatively low concentrations of 27-OH generated a strong survival signaling through an early and transient increase of cellular ROS level, that enhanced MEK-ERK/PI3K-Akt phosphorylation, in turn responsible of a sustained quenching of ROS production. It remains to identify the link between ERK/Akt up-regulation and the consequent quenching effect on ROS intracellular level that efficiently and markedly delay the pro-apoptotic effect of the oxysterol. Here we report on the potent activation of Nrf2 redox-sensitive transcription factor by low micromolar amount of 27-OH added to U937 promonocytic cells. The 27-OH-exerted induction of Nrf2 and subsequently of the target genes, HO-1 and NQO-1, was proved to be: (i) dependent upon the activation of ERK and Akt pathways, (ii) directly responsible for the quenching of intracellular oxidative stress and by this way (iii) ultimately responsible for the observed oxysterol-induced pro-survival response.
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Affiliation(s)
- Beyza Vurusaner
- Biological Sciences and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli-Tuzla, 34956 Istanbul, Turkey.
| | - Paola Gamba
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy.
| | - Simona Gargiulo
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy.
| | - Gabriella Testa
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy.
| | - Erica Staurenghi
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Gabriella Leonarduzzi
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy.
| | - Giuseppe Poli
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy.
| | - Huveyda Basaga
- Biological Sciences and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli-Tuzla, 34956 Istanbul, Turkey.
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28
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He M, Nitti M, Piras S, Furfaro AL, Traverso N, Pronzato MA, Mann GE. Heme oxygenase-1-derived bilirubin protects endothelial cells against high glucose-induced damage. Free Radic Biol Med 2015; 89:91-8. [PMID: 26391462 DOI: 10.1016/j.freeradbiomed.2015.07.151] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 07/29/2015] [Accepted: 07/31/2015] [Indexed: 12/15/2022]
Abstract
Hyperglycemia and diabetes are associated with endothelial cell dysfunction arising from enhanced oxidative injury, leading to the progression of diabetic vascular pathologies. The redox-sensitive transcription factor nuclear factor-E2-related factor 2 (Nrf2) is a master regulator of antioxidant genes, such as heme oxygenase-1 (HO-1), involved in cellular defenses against oxidative stress. We have investigated the pathways involved in high glucose-induced activation of HO-1 in endothelial cells and examined the molecular mechanisms underlying cytoprotection. Elevated d-glucose increased intracellular generation of reactive oxygen species (ROS), leading to nuclear translocation of Nrf2 and HO-1 expression in bovine aortic endothelial cells, with no changes in cell viability. Superoxide scavenging and inhibition of endothelial nitric oxide synthase (eNOS) abrogated upregulation of HO-1 expression by elevated glucose. Inhibition of HO-1 increased the sensitivity of endothelial cells to high glucose-mediated damage, while addition of bilirubin restored cell viability. Our findings establish that exposure of endothelial cells to high glucose leads to activation of endogenous antioxidant defense genes via the Nrf2/ARE pathway. Upregulation of HO-1 provides cytoprotection against high glucose-induced oxidative stress through the antioxidant properties of bilirubin. Modulation of the Nrf2 pathway in the early stages of diabetes may thus protect against sustained damage by hyperglycemia during progression of the disease.
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Affiliation(s)
- Meihua He
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Mariapaola Nitti
- Department of Experimental Medicine, General Pathology Section, University of Genoa, 2L.B. Alberti Street, Genoa, Italy
| | - Sabrina Piras
- Department of Experimental Medicine, General Pathology Section, University of Genoa, 2L.B. Alberti Street, Genoa, Italy
| | | | - Nicola Traverso
- Department of Experimental Medicine, General Pathology Section, University of Genoa, 2L.B. Alberti Street, Genoa, Italy
| | - Maria Adelaide Pronzato
- Department of Experimental Medicine, General Pathology Section, University of Genoa, 2L.B. Alberti Street, Genoa, Italy
| | - Giovanni E Mann
- Cardiovascular Division, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK.
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29
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Daenen KEL, Martens P, Bammens B. Association of HO-1 (GT)n Promoter Polymorphism and Cardiovascular Disease: A Reanalysis of the Literature. Can J Cardiol 2015; 32:160-8. [PMID: 26483091 DOI: 10.1016/j.cjca.2015.06.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 05/27/2015] [Accepted: 06/11/2015] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Heme-oxygenase 1 (HO-1), an inducible heme-degrading enzyme, has antiatherogenic effects through its enzymatic end products. HO-1 gene expression is modulated by a guanidine thymidine dinucleotide ([GT]n) repeat polymorphism in the promoter region. Shorter repeats with (GT)n < 25 are associated with higher inducibility and activity of HO-1. METHODS We performed a systematic review of all literature from 1997 to 2013 on the association of the HO-1 (GT)n and cardiovascular disease (CVD). On the basis of predefined criteria (patient characteristics, genotype data format, allelic distribution, repeat length cutoff) 41 articles were selected. Patients were redistributed into 4 homogeneous subpopulations: patients with CVD (CVD group), patients without CVD (nonCVD), 'controls' with unknown cardiovascular status (unspecified) and children younger than 20 years of age (unselected). Genotype distributions (homozygous short [SS] or long [LL], and heterozygous) of the 4 patient categories were compared and odds ratios (ORs) for CVD were calculated using logistic regression analysis. RESULTS Overall, the proportion of the SS genotype was lower in CVD compared with nonCVD and unspecified. The ORs for CVD was highest in patients carrying the LL genotype (OR LL vs SS, 1.769 [95% confidence interval, 1.594-1.963]). Furthermore, genotype distribution differed between Caucasian and Asian individuals, the latter having a much higher proportion of the SS genotype (22% vs 11%). CONCLUSIONS This review of the available literature on the epidemiological association between the HO-1 (GT)n repeat polymorphism and CVD supports the presumed protective effects of HO-1. The second but probably even more relevant finding of our review is that racial disparities in HO-1 (GT)n repeat length distribution exist and might influence the associations of the genotype with CVD status.
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Affiliation(s)
- Kristien E L Daenen
- Laboratory of Nephrology, Department of Immunology and Microbiology, KU Leuven, Leuven, Belgium; Department of Nephrology, Dialysis and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium
| | - Pieter Martens
- Department of Nephrology, Dialysis and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium
| | - Bert Bammens
- Laboratory of Nephrology, Department of Immunology and Microbiology, KU Leuven, Leuven, Belgium; Department of Nephrology, Dialysis and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium.
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30
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Ge M, Yao W, Wang Y, Yuan D, Chi X, Luo G, Hei Z. Propofol alleviates liver oxidative stress via activating Nrf2 pathway. J Surg Res 2015; 196:373-81. [DOI: 10.1016/j.jss.2015.03.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/09/2015] [Accepted: 03/11/2015] [Indexed: 12/14/2022]
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31
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Yin X, Wang X, Fan Z, Peng C, Ren Z, Huang L, Liu Z, Zhao K. Hyperbaric Oxygen Preconditioning Attenuates Myocardium Ischemia-Reperfusion Injury Through Upregulation of Heme Oxygenase 1 Expression: PI3K/Akt/Nrf2 Pathway Involved. J Cardiovasc Pharmacol Ther 2015; 20:428-38. [PMID: 25604781 DOI: 10.1177/1074248414568196] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Accepted: 12/10/2014] [Indexed: 01/30/2023]
Abstract
BACKGROUND With the rise of the burden of ischemic heart disease, both clinical and economic evidence show a desperate need to protect the heart against myocardium ischemia-reperfusion injury-related complications following cardiac surgery or percutaneous coronary intervention. However, there is no effective intervention for myocardium ischemia-reperfusion injury as yet. METHODS We pretreated mice with 4 daily 2.0 absolute atmosphere (ATA) hyperbaric oxygen, then observed its effects on heart function parameters and infarct size following in situ ischemia-reperfusion. Multiple oxidative and inflammation products were measured in the myocardium. Next, we investigated the expression of heme oxygenase 1 (HO-1), phosphatidylinositol 3-kinase (PI3K)/serine/threonine protein kinase (Akt) pathway, and NF-E2-related factor 2 (Nrf2) in the presence of myocardium ischemia-reperfusion injury, hyperbaric oxygen preconditioning, and their inhibitors and their effects on heart function parameters. RESULTS Hyperbaric oxygen preconditioning ameliorated the cardiac function and histological alterations induced by myocardium ischemia-reperfusion injury, decreased oxidative products and proinflammatory cytokine. Hyperbaric oxygen preconditioning increased expression of HO-1, which was suppressed by PI3K inhibitor LY294002, Nrf2 knockout, and Akt inhibitor triciribine. The expression of Nrf2 was enhanced by hyperbaric oxygen preconditioning, but decreased by LY294002 and triciribine. The Akt was also activated by hyperbaric oxygen preconditioning but suppressed by LY294002. The hemodynamic assays showed that cardiac function was suppressed by LY294002, Nrf2 knockout, and triciribine. CONCLUSION These data present a novel signaling mechanism by which hyperbaric oxygen preconditioning protects myocardium ischemia-reperfusion injury via PI3K/Akt/Nrf2-dependent antioxidant defensive system.
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Affiliation(s)
- Xuesong Yin
- Department of Emergency Medicine, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
| | - Xiaofeng Wang
- Department of General Medicine, The Fourth Hospital of Heilongjiang Province, Harbin, People's Republic of China
| | - Zhixin Fan
- Department of Cardiology, The First Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
| | - Chenghai Peng
- Department of Emergency Medicine, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
| | - Zhongqiao Ren
- Department of Emergency Medicine, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
| | - Le Huang
- Department of Emergency Medicine, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
| | - Zhuang Liu
- Department of Emergency Medicine, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
| | - Kan Zhao
- Department of Emergency Medicine, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, People's Republic of China
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32
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Chi PL, Lin CC, Chen YW, Hsiao LD, Yang CM. CO Induces Nrf2-Dependent Heme Oxygenase-1 Transcription by Cooperating with Sp1 and c-Jun in Rat Brain Astrocytes. Mol Neurobiol 2014; 52:277-92. [PMID: 25148934 DOI: 10.1007/s12035-014-8869-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 08/15/2014] [Indexed: 12/30/2022]
Abstract
Upregulation of heme oxygenase 1 (HO-1) by carbon monoxide (CO) delivered by CO-releasing molecules (CORMs) may be utilized as a therapeutic intervention for neurodegenerative diseases. This study was to delineate the two putative anti-oxidant response elements (AREs) in modulating HO-1 gene by participating with its promoter elements in rat brain astrocytes (RBA-1). CORM-2-induced HO-1 expression was mediated through superoxide, p38 mitogen-activated protein kinase(MAPK), extracellular signal-regulated protein kinases 1 and 2 (Erk1/2), protein tyrosine kinase 2 (Pyk2), platelet-derived growth factor receptor (PDGFR), and phosphatidylinositol 3'-kinase (PI3K/Akt), revealed by the pharmacological inhibitors or knockdown of these signaling molecules. CORM-2-enhanced HO-1 promoter activity was inhibited by co-transfection with small interfering RNA (siRNA) of c-Jun, specificity protein 1 (Sp1), or nuclear factor-erythroid 2-related factor 2 (Nrf2). Immunoprecipitation assay showed that CORM-2 increased the association of nuclear Nrf2 with Sp1 and c-Jun. Furthermore, chromatin immunoprecipitation (ChIP) assay confirmed that Nrf2, Sp1, and c-Jun are associated with the proximal ARE binding site on HO-1 promoter, suggesting that Nrf2/Sp1/c-Jun cooperations are key transcription factors modulating HO-1 expression. Mechanistically, CORM-2-induced ARE promoter activity was reduced by the inhibitors of reactive oxygen species (ROS), p38 MAPK, Pyk2, MAPK/ERK kinases 1 and 2 (MEK1/2), PDGFR, and PI3K/Akt or the siRNAs of c-Jun, SP1, and Nrf2. These findings suggested that CORM-2 increases formation of c-Jun, Sp1, and Nrf2 complex and binding with ARE1 binding site, which is mediated through both ROS/p38 MAPK and Pyk2-dependent PDGFR/PI3K/Akt/Erk1/2 pathways, resulting in HO-1 expression in RBA-1 cells.
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Affiliation(s)
- Pei-Ling Chi
- Department of Physiology and Pharmacology and Health Ageing Research Center, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, 33302, Tao-Yuan, Taiwan
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33
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Zhao B, Fei J, Chen Y, Ying YL, Ma L, Song XQ, Wang L, Chen EZ, Mao EQ. Pharmacological preconditioning with vitamin C attenuates intestinal injury via the induction of heme oxygenase-1 after hemorrhagic shock in rats. PLoS One 2014; 9:e99134. [PMID: 24927128 PMCID: PMC4057195 DOI: 10.1371/journal.pone.0099134] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 05/09/2014] [Indexed: 12/17/2022] Open
Abstract
Pre-induction of heme oxygenase (HO)-1, which is regarded as an effective method of “organ preconditioning”, exerts beneficial effects during hemorrhagic shock (HS). However, the available HO-1 inducers exhibit disadvantages such as toxicity or complex technical requirements. Therefore, a safe and convenient HO-1 inducer would be promising and could be exploited in the treatment of foreseeable hemorrhaging, such as prior to major surgery. Here we investigated the effect of vitamin C (VitC), a common antioxidant, on intestinal HO-1 expression and examined whether VitC pretreatment prevented HS related intestinal tissue injuries after HO-1 induction. First, we conducted an in vitro study and found that HO-1 expression in rat intestinal epithelial cells (IEC-6) was induced by non-toxic VitC in a time and concentration dependent manner, and the mechanism was related to the activation of extracellular signal-regulated kinase 1/2 (ERK1/2). Next, we conducted an in vivo study and found that VitC induced intestinal HO-1 protein expression (mainly observed in the intestinal epithelial cells) and HO-1 activity in normal SD rats, and that these HO-1 levels were further enhanced by VitC in a rat model of HS. The HS related intestinal injuries, including histological damage, pro-inflammatory cytokine levels (tumor necrosis factor and interleukin-6), neutrophil infiltration and apoptosis decreased after VitC pretreatment, and this alleviating of organ injuries was abrogated after the inhibition of HO-1 activity by zinc protoporphyrin-IX. It was of note that VitC did little histological damage to the intestine of the sham rats. These data suggested that VitC might be applied as a safe inducer of intestinal HO-1 and that VitC pretreatment attenuated HS related intestinal injuries via the induction of HO-1.
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Affiliation(s)
- Bing Zhao
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jian Fei
- Department of Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ying Chen
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yi-Lin Ying
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Li Ma
- Department of Emergency Intensive Care Unit, the Third People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiao-Qin Song
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lu Wang
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Er-Zhen Chen
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- * E-mail: (EQM); (EZC)
| | - En-Qiang Mao
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- * E-mail: (EQM); (EZC)
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Soy isoflavone antagonizes the oxidative cerebrovascular injury induced by β-amyloid peptides 1-42 in rats. Neurochem Res 2014; 39:1374-81. [PMID: 24810766 DOI: 10.1007/s11064-014-1319-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 04/21/2014] [Accepted: 04/23/2014] [Indexed: 10/25/2022]
Abstract
Numerous evidences have shown that the antioxidative properties of soy isoflavone (SIF) have beneficial effects on prophylaxis of neurodegeneration, however, the mechanism is still not fully illustrated. As cerebrovascular dysfunction could initiate a cascade of events leading to pathogenesis of Alzheimer's disease, we tried to investigate whether SIF could protect the cerebrovascular system due to antagonizing oxidative damage induced by Aβ1-42 in present study. In addition, NF-E2-related factor 2 (Nrf2) signaling pathways in the cerebrovascular tissue of Wistar rats were investigated to identify the potential cerebrovascular protective targets of SIF. Research results showed that SIF reduced the excessive production of nitrotyrosine in cerebrovascular tissue induced by Aβ1-42, and maintained redox homeostasis by increasing the level of GSH and GSH/GSSG. Moreover, SIF could alleviate the down-regulation of Nrf2, γ-glutamylcysteine synthetase, Heme oxygenase-1 expressions in cerebrovascular tissue induced by Aβ1-42 and suppress the increase of Kelch like ECH protein-1 (Keap1). These data suggested that SIF might reduce the cerebrovascular oxidative damage induced by Aβ1-42 through regulating the Nrf2 signaling pathway. The mechanisms of SIF modulating the potential target Nrf2 might be associated with Keap1 expression.
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Kim SJ, Kim JM, Shim SH, Chang HI. Anthocyanins accelerate the healing of naproxen-induced gastric ulcer in rats by activating antioxidant enzymes via modulation of Nrf2. J Funct Foods 2014. [DOI: 10.1016/j.jff.2013.12.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Mo C, Wang L, Zhang J, Numazawa S, Tang H, Tang X, Han X, Li J, Yang M, Wang Z, Wei D, Xiao H. The crosstalk between Nrf2 and AMPK signal pathways is important for the anti-inflammatory effect of berberine in LPS-stimulated macrophages and endotoxin-shocked mice. Antioxid Redox Signal 2014; 20:574-88. [PMID: 23875776 PMCID: PMC3901384 DOI: 10.1089/ars.2012.5116] [Citation(s) in RCA: 340] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AIMS The response of AMP-activated protein kinase (AMPK) to oxidative stress has been recently reported but the downstream signals of this response are largely unknown. Meanwhile, the upstream events for the activation of nuclear factor erythroid-2-related factor-2 (Nrf2), a critical transcriptional activator for antioxidative responses, remain unclear. In the present study, we investigated the relationship between AMPK and Nrf2 signal pathways in lipopolysaccharide (LPS)-triggered inflammatory system, in which berberine (BBR), a known AMPK activator, was used for inflammation suppression. RESULTS AND INNOVATION In inflammatory macrophages, BBR attenuated LPS-induced expression of inflammatory genes (inducible nitric oxide synthase [iNOS], cyclooxygenase-2 [COX2], interleukin [IL]-6), and the generation of nitric oxide and reactive oxygen species, but increased the transcription of Nrf2-targeted antioxidative genes (NADPH quinone oxidoreductase-1 [NQO-1], heme oxygenase-1 [HO-1]), as well as the nuclear localization and phosphorylation of Nrf2 protein. Importantly, we found BBR-induced activation of Nrf2 is AMPK-dependent, as either pharmacologically or genetically inactivating AMPK blocked the activation of Nrf2. Consistent with in vitro experiments, BBR down-regulated the expression of proinflammatory genes but upregulated those of Nrf2-targeted genes in lungs of LPS-injected mice, and these effects were attenuated in Nrf2-deficient mice. Moreover, the effect of BBR on survival time extension and plasma redox regulation in endotoxin-shocked mice was largely weakened when Nrf2-depleted. CONCLUSIONS Our results demonstrate convergence between AMPK and Nrf2 pathways and this intersection is essential for anti-inflammatory effect of BBR in LPS-stimulated macrophages and endotoxin-shocked mice. Uncovering this intersection is significant for understanding the relationship between energy homeostasis and antioxidative responses and may be beneficial for developing new therapeutic strategies against inflammatory diseases. Antioxid. Redox Signal. 20, 574-588.
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Affiliation(s)
- Chunfen Mo
- 1 Lab for Aging Research, Center for Medical Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu, China
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Ha DT, Oh J, Khoi NM, Dao TT, Dung LV, Do TNQ, Lee SM, Jang TS, Jeong GS, Na M. In vitro and in vivo hepatoprotective effect of ganodermanontriol against t-BHP-induced oxidative stress. JOURNAL OF ETHNOPHARMACOLOGY 2013; 150:875-885. [PMID: 24140584 DOI: 10.1016/j.jep.2013.09.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 09/09/2013] [Accepted: 09/11/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ganoderma lucidum (Fr.) Karst. (Ganodermataceae) is a mushroom which is used as a traditional remedy in the treatment of human diseases such as hepatitis, liver disorders, hypercholesterolemia, arthritis, bronchitis and tumorigenic diseases. This study targets the evaluation of hepatoprotective activity of ganodermanontriol, a sterol isolated from Ganoderma lucidum, and the investigation of its mechanism of action in Hepa1c1c7 and murine liver cells upon tert-butyl hydroperoxide (t-BHP)-induced inflammation. t-BHP was utilized to stimulate an anti-inflammatory reaction in the hepatic cell lines and murine hepatic tissue examined. Western blot and reverse transcription-quantitative polymerase chain reaction (RT-PCR) were used to estimate the expression of ganodermanontriol (GDT)-induced proteins, including heme oxidase-1 (HO-1) and mitogen-activated protein kinases (MAPKs) as well as the corresponding mRNA. Luciferase assays were conducted to evaluate the interaction between NF-E2-related factor-2 (Nrf-2), the antioxidant response element (ARE), and the promoter region of the HO-1 gene and subsequent gene expression. Biochemical markers for hepatotoxicity were monitored to assess whether GDT protected the cells from the t-BHP-mediated oxidative stimuli. RESULTS GDT induced HO-1 expression via the activation of Nrf-2 nuclear translocation and the subsequent transcription of the HO-1 gene in vitro and in vivo, which seemed to be regulated by phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) and p38 signaling pathways. GDT exhibited in vitro and in vivo hepatoprotective activity as determined by the lowered levels of hepatic enzymes and malondialdehydes and the elevated glutathione levels. CONCLUSIONS This study validates the ethnopharmacological application of Ganoderma lucidum as a treatment for hepatic disorders. GDT induced in vitro and in vivo anti-inflammatory activity in t-BHP-damaged hepatic cells through the expression of HO-1, and in which PI3K/Akt and p38 kinases are involved. Our study motivates further research in the exploration of potent hepatoprotective agents from Ganoderma lucidum.
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Affiliation(s)
- Do Thi Ha
- National Institute of Medicinal Materials (NIMM), 3B Quangtrung, Hoankiem, Hanoi, Vietnam; College of Pharmacy, Chungnam National University, Daejeon 305-764, Republic of Korea
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Zhang T, Liang X, Shi L, Wang L, Chen J, Kang C, Zhu J, Mi M. Estrogen receptor and PI3K/Akt signaling pathway involvement in S-(-)equol-induced activation of Nrf2/ARE in endothelial cells. PLoS One 2013; 8:e79075. [PMID: 24260155 PMCID: PMC3833998 DOI: 10.1371/journal.pone.0079075] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 09/26/2013] [Indexed: 12/25/2022] Open
Abstract
S-(-)equol, a natural product of the isoflavone daidzein, has been reported to offer cytoprotective effects with respect to the cardiovascular system, but how this occurs is unclear. Interestingly, S-(-)equol is produced by the human gut, suggesting a role in physiological processes. We report that treatment of human umbilical vein endothelial cells and EA.hy926 cells with S-(-)equol induces ARE-luciferase reporter gene activity that is dose and time dependent. S-(-)equol (10-250 nM) increases nuclear factor-erythroid 2-related factor 2 (Nrf2) as well as gene products of Nrf2 target genes heme oxygenase-1 (HO-1) and NAD(P)H (nicotinamide-adenine-dinucleotide-phosphate) quinone oxidoreductase 1 (NQO1). Endothelial cells transfected with an HA-Nrf2 expression plasmid had elevated HA-Nrf2, HO-1, and NQO1 in response to S-(-)equol exposure. S-(-)equol treatment affected Nrf2 mRNA only slightly but significantly increased HO-1 and NQO1 mRNA. The pretreatment of cells with specific ER inhibitors or PI3K/Akt (ICI182,780 and LY294002) increased Nrf2, HO-1, and NQO1 protein, impaired nuclear translocation of HA-Nrf2, and decreased ARE-luciferase activity. Identical experiments were conducted with daidzein, which had effects similar to S-(-)equol. In addition, DPN treatment (an ERβ agonist) induced the ARE-luciferase reporter gene, promoting Nrf2 nuclear translocation. Cell pretreatment with an ERβ antagonist (PHTPP) impaired S-(-)equol-induced Nrf2 activation. Pre-incubation of cells followed by co-treatment with S-(-)equol significantly improved cell survival in response to H2O2 or tBHP and reduced apoptotic and TUNEL-positively-stained cells. Notably, the ability of S-(-)equol to protect against H2O2-induced cell apoptosis was attenuated in cells transfected with an siRNA against Nrf2. Thus, beneficial effects of S-(-)equol with respect to cytoprotective antioxidant gene activation may represent a novel strategy to prevent and treat cardiovascular diseases.
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Affiliation(s)
- Ting Zhang
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Xinyu Liang
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Linying Shi
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Li Wang
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Junli Chen
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Chao Kang
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Jundong Zhu
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
| | - Mantian Mi
- Research Center for Nutrition and Food Safety, The Third Military Medical University, Chongqing, PR China
- * E-mail:
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Jiang ZY, Chu HX, Xi MY, Yang TT, Jia JM, Huang JJ, Guo XK, Zhang XJ, You QD, Sun HP. Insight into the intermolecular recognition mechanism between Keap1 and IKKβ combining homology modelling, protein-protein docking, molecular dynamics simulations and virtual alanine mutation. PLoS One 2013; 8:e75076. [PMID: 24066166 PMCID: PMC3774807 DOI: 10.1371/journal.pone.0075076] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 08/11/2013] [Indexed: 12/20/2022] Open
Abstract
Degradation of certain proteins through the ubiquitin-proteasome pathway is a common strategy taken by the key modulators responsible for stress responses. Kelch-like ECH-associated protein-1(Keap1), a substrate adaptor component of the Cullin3 (Cul3)-based ubiquitin E3 ligase complex, mediates the ubiquitination of two key modulators, NF-E2-related factor 2 (Nrf2) and IκB kinase β (IKKβ), which are involved in the redox control of gene transcription. However, compared to the Keap1-Nrf2 protein-protein interaction (PPI), the intermolecular recognition mechanism of Keap1 and IKKβ has been poorly investigated. In order to explore the binding pattern between Keap1 and IKKβ, the PPI model of Keap1 and IKKβ was investigated. The structure of human IKKβ was constructed by means of the homology modeling method and using reported crystal structure of Xenopus laevis IKKβ as the template. A protein-protein docking method was applied to develop the Keap1-IKKβ complex model. After the refinement and visual analysis of docked proteins, the chosen pose was further optimized through molecular dynamics simulations. The resulting structure was utilized to conduct the virtual alanine mutation for the exploration of hot-spots significant for the intermolecular interaction. Overall, our results provided structural insights into the PPI model of Keap1-IKKβ and suggest that the substrate specificity of Keap1 depend on the interaction with the key tyrosines, namely Tyr525, Tyr574 and Tyr334. The study presented in the current project may be useful to design molecules that selectively modulate Keap1. The selective recognition mechanism of Keap1 with IKKβ or Nrf2 will be helpful to further know the crosstalk between NF-κB and Nrf2 signaling.
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Affiliation(s)
- Zheng-Yu Jiang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Hong-Xi Chu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Mei-Yang Xi
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Ting-Ting Yang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Jian-Min Jia
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Jing-Jie Huang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Xiao-Ke Guo
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Xiao-Jin Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
- Department of Organic Chemistry, School of Science, China Pharmaceutical University, Nanjing, China
| | - Qi-Dong You
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
| | - Hao-Peng Sun
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, China
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, China
- * E-mail:
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Huang CS, Lin AH, Liu CT, Tsai CW, Chang IS, Chen HW, Lii CK. Isothiocyanates protect against oxidized LDL-induced endothelial dysfunction by upregulating Nrf2-dependent antioxidation and suppressing NFκB activation. Mol Nutr Food Res 2013; 57:1918-30. [PMID: 23836589 DOI: 10.1002/mnfr.201300063] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 04/16/2013] [Accepted: 04/21/2013] [Indexed: 12/30/2022]
Abstract
SCOPE Oxidative stress plays a pivotal role in the pathophysiology of cardiovascular diseases. Oxidized low-density lipoprotein (oxLDL) is a key contributor to atherogenesis through multiple mechanisms. In this study, we investigated the protection by three structurally related isothiocyanates, i.e., sulforaphane (SFN), benzyl isothiocyanate (BITC), and phenethyl isocyanate (PEITC), against oxLDL-induced leukocyte adhesion to vascular endothelium and the mechanism involved. METHODS AND RESULTS The protection against oxLDL-induced endothelial dysfunction by isothiocyanates was studied in human umbilical vein endothelial cells (HUVECs). oxLDL increased reactive oxygen species (ROS) production, stimulated nuclear factor-kappaB (NFκB) activation, and enhanced intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), and E-selectin expression in HUVECs, which led to promotion of monocyte adhesion to HUVECs. Treatment with SFN, BITC, and PEITC (0-10 μM) dose-dependently induced heme oxygenase (HO)-1, glutamate cysteine ligase (GCL) catalytic and modifier subunit expression, intracellular glutathione content, and antioxidant response element (ARE)-luciferase reporter activity. SFN, BITC, and PEITC pretreatment reversed oxLDL-induced ROS production, NFκB nuclear translocation, κB-reporter activity, ICAM-1, VCAM-1, and E-selectin expression, and monocyte adhesion to endothelial cells. Both heme oxygenase 1 (HO-1) and nuclear factor erythroid 2-related factor 2 (Nrf2) knockdown attenuated the isothiocyanate inhibition of oxLDL-induced ROS production, κB-reporter activity, and adhesion molecule expression. CONCLUSION SFN, BITC, and PEITC protect against oxLDL-induced endothelial damage by upregulating Nrf2-dependent HO-1 and GCL expression, which leads to inhibition of NFκB activation and ICAM-1, VCAM-1, and E-selectin expression.
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Affiliation(s)
- Chin-Shiu Huang
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
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Park CH, Lee SL, Noh JS, Yokozawa T. Rokumi-jio-gan-containing prescriptions regulate oxidative stress through improving dyslipidemia in a subtotal nephrectomized rat model. JOURNAL OF ETHNOPHARMACOLOGY 2013; 148:449-458. [PMID: 23639360 DOI: 10.1016/j.jep.2013.04.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 04/07/2013] [Accepted: 04/19/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rokumi-jio-gan-containing prescriptions, traditional medicine, are widely used to treat renal dysfunction in Japan. AIM OF THE STUDY The present study was conducted to examine whether two Rokumi-jio-gan-containing prescriptions (Hachimi-jio-gan and Bakumi-jio-gan) have an ameliorative effect on dyslipidemia in nephrectomized rats. MATERIALS AND METHODS Each prescription was orally administered to nephrectomized rats at 150mg/kg body weight per day for 10 weeks, and its effect was compared with vehicle-treated nephrectomized rats. RESULTS Rats given Hachimi-jio-gan and Bakumi-jio-gan showed an improvement of renal functional parameters such as serum urea nitrogen, creatinine, creatinine clearance, and urinary protein. The increased triglyceride, total cholesterol, non-esterified fatty acid, high-density lipoprotein cholesterol, and very low-density lipoprotein cholesterol/low-density lipoprotein cholesterol levels in serum, and triglyceride and total cholesterol contents in the kidney of nephrectomized rats were significantly decreased by Hachimi-jio-gan and Bakumi-jio-gan administration. Furthermore, Hachimi-jio-gan acts as a regulator of peroxisome proliferator-activated receptor α, sterol regulatory element binding protein (SREBP)-1, and SREBP-2. On the contrary, the increased reactive oxygen species and thiobarbituric acid-reactive substance were decreased, while superoxide dismutase and the reduced glutathione/oxidized glutathione ratio were augmented by Hachimi-jio-gan rather than Bakumi-jio-gan. The improvement of nuclear factor-kappa Bp65, cyclooxygenase-2, inducible nitric oxide synthase, NF-E2-related factor 2, and heme oxygenase-1 was marked in the group administered Bakumi-jio-gan. However, oil red O staining showed that the increased lipid deposition in the kidney of nephrectomized rats improved on Hachimi-jio-gan and Bakumi-jio-gan administration. CONCLUSION This study provides scientific evidence that two Rokumi-jio-gan-containing prescriptions (Hachimi-jio-gan and Bakumi-jio-gan) improve oxidative stress via dyslipidemia in the remnant kidney of nephrectomized rats.
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Affiliation(s)
- Chan Hum Park
- Institute of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
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Involvement of Nrf2-mediated upregulation of heme oxygenase-1 in mollugin-induced growth inhibition and apoptosis in human oral cancer cells. BIOMED RESEARCH INTERNATIONAL 2013; 2013:210604. [PMID: 23738323 PMCID: PMC3659465 DOI: 10.1155/2013/210604] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 04/03/2013] [Accepted: 04/05/2013] [Indexed: 11/17/2022]
Abstract
Although previous studies have shown that mollugin, a bioactive phytochemical isolated from Rubia cordifolia L. (Rubiaceae), exhibits antitumor effects, its biological activity in oral cancer has not been reported. We thus investigated the effects and putative mechanism of apoptosis induced by mollugin in human oral squamous cell carcinoma cells (OSCCs). Results show that mollugin induces cell death in a dose-dependent manner in primary and metastatic OSCCs. Mollugin-induced cell death involved apoptosis, characterized by the appearance of nuclear shrinkage, flow cytometric analysis of sub-G1 phase arrest, and annexin V-FITC and propidium iodide staining. Western blot analysis and RT-PCR revealed that mollugin suppressed activation of NF-κB and NF-κB-dependent gene products involved in antiapoptosis (Bcl-2 and Bcl-xl), invasion (MMP-9 and ICAM-1), and angiogenesis (FGF-2 and VEGF). Furthermore, mollugin induced the activation of p38, ERK, and JNK and the expression of heme oxygenase-1 (HO-1) and nuclear factor E2–related factor 2 (Nrf2). Mollugin-induced growth inhibition and apoptosis of HO-1 were reversed by an HO-1 inhibitor and Nrf2 siRNA. Collectively, this is the first report to demonstrate the effectiveness of mollugin as a candidate for a chemotherapeutic agent in OSCCs via the upregulation of the HO-1 and Nrf2 pathways and the downregulation of NF-κB.
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Kim DK, Lillehoj HS, Lee KW, Jang SI, Neumann AP, Siragusa GR, Lillehoj EP, Hong YH. Genome-wide differential gene expression profiles in broiler chickens with gangrenous dermatitis. Avian Dis 2013; 56:670-9. [PMID: 23397837 DOI: 10.1637/10069-013112-reg.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Gangrenous dermatitis (GD) is a disease of poultry characterized by necrosis of the skin and severe cellulitis of the subcutaneous tissues caused by infection with Clostridium septicum (CS) and/or Clostridium perfringens (CP) type A. While GD causes significant morbidity, mortality, and economic loss to the poultry industry, the fundamental mechanisms underlying this host-pathogen interaction are relatively unknown. This study used comparative global gene expression microarray analysis of GD-affected and clinically healthy chickens from a recent GD outbreak to glean insights into the molecular and cellular changes associated with this disease process. Histopathologic and immunohistochemical analyses confirmed extensive muscle damage and prominent leukocyte infiltration in the skin of GD-affected birds but not in healthy controls. The levels of mRNAs in the skin and underlying muscle corresponding to 952 microarray elements were altered in GD-afflicted birds compared with healthy controls, with 468 being increased and 484 decreased. From these, a subset of 386 genes was identified and used for biologic function and pathway analyses. The biologic functions that were most significantly associated with the differentially expressed genes were "inflammatory response" and "cellular growth and proliferation" classified under the categories of "disease and disorders" and "molecular and cellular functions," respectively. The biologic pathway that was most significantly associated with the differentially expressed genes was the nuclear factor-erythroid 2-related factor 2 (NRF2)-mediated oxidative stress pathway. Finally, in vitro infection of chicken macrophages with CS or CP modified the levels of mRNAs encoding interferon (IFN)-alpha, IFN-gamma, interleukin (IL)-1beta, IL-6, IL-12p40, tumor necrosis factor superfamily 15 (downregulated), IL-8, and IL-10 (upregulated), thus confirming the suppressive effect of GD on the chicken immune system.
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Affiliation(s)
- Duk Kyung Kim
- Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, United States Department of Agriculture, Agricultural Research Service, Building 1043, Beltsville Agricultural Research Center-East, Beltsville, MD 20705, USA
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Rokumi-jio-gan-Containing Prescriptions Attenuate Oxidative Stress, Inflammation, and Apoptosis in the Remnant Kidney. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:587902. [PMID: 23243456 PMCID: PMC3518768 DOI: 10.1155/2012/587902] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 10/09/2012] [Accepted: 10/12/2012] [Indexed: 02/07/2023]
Abstract
Two Rokumi-jio-gan-containing prescriptions (Hachimi-jio-gan and Bakumi-jio-gan) were selected to examine their actions in nephrectomized rats. Each prescription was given orally to rats for 10 weeks after the excision of five-sixths of their kidney volumes, and its effect was compared with non-nephrectomized and normal rats. Rats given Hachimi-jio-gan and Bakumi-jio-gan showed an improvement of renal functional parameters such as serum urea nitrogen, creatinine, creatinine clearance, and urinary protein. The nephrectomized rats exhibited the up-regulation of nicotinamide adenine dinucleotide phosphate oxidase subunits, c-Jun N-terminal kinase (JNK), phosphor-JNK, c-Jun, transforming growth factor-β1, nuclear factor-kappa B, cyclooxygenase-2, inducible nitric oxide synthase, monocyte chemotactic protein-1, intracellular adhesion molecule-1, Bax, cytochrome c, and caspase-3, and down-regulation of NF-E2-related factor 2, heme oxygenase-1, and survivin; however, Bakumi-jio-gan administration acts as a regulator in inflammatory reactions caused by oxidative stress in renal failure. Moreover, the JNK pathway and apoptosis-related protein expressions, Bax, caspase-3, and survivin, were ameliorated to the normal levels by Hachimi-jio-gan administration. The development of renal lesions, glomerular sclerosis, tubulointerstitial damage, and arteriolar sclerotic lesions, estimated by histopathological evaluation and scoring, was strong in the groups administered Hachimi-jio-gan rather than Bakumi-jio-gan. This study suggests that Rokumi-jio-gan-containing prescriptions play a protective role in the progression of renal failure.
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Evaluation of Effects of Chinese Prescription Kangen-karyu on Diabetes-Induced Alterations such as Oxidative Stress and Apoptosis in the Liver of Type 2 Diabetic db/db Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:143489. [PMID: 22969821 PMCID: PMC3437317 DOI: 10.1155/2012/143489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 06/22/2012] [Accepted: 06/22/2012] [Indexed: 11/23/2022]
Abstract
The present study was conducted to examine whether Kangen-karyu has an ameliorative effect on diabetes-induced alterations such as oxidative stress and apoptosis in the liver of type 2 diabetic db/db mice. Kangen-karyu (100 or 200 mg/kg body weight/day, p.o.) was administered every day for 18 weeks to db/db mice and its effect was compared with vehicle-treated db/db and m/m mice. The administration of Kangen-karyu decreased the elevated serum glucose and leptin concentrations in db/db mice, and reduced the increased oxidative biomarkers including the generation of reactive oxygen species and lipid peroxidation in the liver. The db/db mice exhibited the upregulation of nicotinamide adenine dinucleotide phosphate oxidase subunits, NF-E2-related factor 2, heme oxygenase-1, nuclear factor-kappa B, cyclooxygenase-2, and inducible nitric oxide synthase levels in the liver; however, Kangen-karyu treatment significantly reduced those expressions. Moreover, the augmented expressions of apoptosis-related proteins, Bax, cytochrome c, c-Jun N-terminal kinase (JNK), phosphor-JNK, AP-1, and caspase-3, were downregulated by Kangen-karyu administration. Hematoxylin-eosin staining showed that the increased hepatocellular damage in the liver of db/db mice improved by Kangen-karyu administration. Our findings support the therapeutic evidence for Kangen-karyu ameliorating the development of diabetic hepatic complications via regulating oxidative stress and apoptosis.
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Li FYL, Lam KSL, Tse HF, Chen C, Wang Y, Vanhoutte PM, Xu A. Endothelium-selective activation of AMP-activated protein kinase prevents diabetes mellitus-induced impairment in vascular function and reendothelialization via induction of heme oxygenase-1 in mice. Circulation 2012; 126:1267-77. [PMID: 22851545 DOI: 10.1161/circulationaha.112.108159] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Endothelial damage and dysfunction are crucial mediators that link diabetes mellitus with atherosclerotic cardiovascular disease. AMP-activated kinase (AMPK) has been implicated in regulation of both energy metabolism and vascular homeostasis. The present study investigated whether endothelium-selective activation of AMPK prevents diabetes mellitus-induced endothelial damage and vascular dysfunction by improving reendothelialization in mice. METHODS AND RESULTS Transgenic mice with endothelium-selective expression of a constitutively active (CA) AMPK were generated and rendered diabetic by the injection of streptozotocin. Relaxation and reendothelialization of carotid arteries and circulating numbers of endothelial progenitor cells (EPCs) were examined after wire-induced denudation. Bone marrow-derived EPCs were isolated to monitor their in vivo and in vitro function. Compared with wild-type littermates, the CA-AMPK transgenic mice were resistant to diabetes mellitus-induced impairment in endothelium-dependent relaxation and reendothelialization of their injured carotid arteries. These changes in the transgenic mice were accompanied by increased mobilization of EPCs and enhanced incorporation of EPCs into injured blood vessels. Furthermore, EPCs from the transgenic mice exhibited augmented adhesion, migration, and tube formation capacities. At the molecular level, the expression of heme oxygenase (HO)-1 and the secretion of stromal cell-derived factor (SDF)-1α were upregulated in EPCs derived from the transgenic mice, whereas AMPK-mediated elevation of serum SDF-1α levels and improvements of EPC function and reendothelialization were all abrogated by pharmacological inhibition of heme oxygenase-1. CONCLUSIONS Endothelium-specific AMPK activation is sufficient to protect against diabetes mellitus-induced aggravation of vascular injury by promoting EPC function and reendothelialization via upregulation of heme oxygenase-1 and SDF-1α.
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Chen M, Zhou L, Ding H, Huang S, He M, Zhang X, Cheng L, Wang D, Hu FB, Wu T. Short (GT) ( n ) repeats in heme oxygenase-1 gene promoter are associated with lower risk of coronary heart disease in subjects with high levels of oxidative stress. Cell Stress Chaperones 2012; 17:329-38. [PMID: 22120665 PMCID: PMC3312960 DOI: 10.1007/s12192-011-0309-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 10/20/2011] [Accepted: 10/21/2011] [Indexed: 01/30/2023] Open
Abstract
Although (GT) ( n ) repeats in heme oxygenase-1 (HO-1) promoter may modulate gene transcriptional activity, the association between (GT) ( n ) repeats polymorphism and risk of coronary heart disease (CHD) from different levels of oxidative stress (OS) is unknown. We determined the allelic frequencies of (GT) ( n ) repeats in the HO-1 gene promoter and plasma malonaldehyde (MDA) as biomarkers of OS in 2,298 pairs of CHD patients and controls in the Chinese population. Furthermore, we measured MDA in culture mediums and HO-1 expressions levels in cell lysates of endothelial cells carrying various (GT) ( n ) genotypes under different concentrations of H(2)O(2). Compared with L/L genotype (>25 repeats) carriers, the adjusted odd ratios for S/S genotype (≤25 repeats) in subjects with different levels of OS (MDA < 1.83, 1.83-2.91, >2.91 μmol/L) were 1.06 (95%CI, 0.75 to 1.49), 0.79 (95%CI, 0.55 to 1.12), and 0.60 (95%CI, 0.44 to 0.81), respectively (P (interaction) = 0.002). In biological experiments, compared with endothelial cells carrying L/L genotype, cells with S/S genotype did not have a significantly higher HO-1 expression under 0 μmol/L H(2)O(2), but displayed a significantly higher HO-1 expression under 50 μmol/L H(2)O(2) (P (interaction) = 0.003). S/S genotype in HO-1 gene promoter is associated with a lower risk of CHD in subjects with higher levels of OS, because under conditions of high OS, the S/S genotype has higher levels of HO-1, an antioxidant.
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Affiliation(s)
- Mu Chen
- Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd, Wuhan, Hubei 430030 China
| | - Li Zhou
- Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd, Wuhan, Hubei 430030 China
| | - Hu Ding
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, Hubei 430030 China
| | - Suli Huang
- Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd, Wuhan, Hubei 430030 China
| | - Meian He
- Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd, Wuhan, Hubei 430030 China
| | - Xiaomin Zhang
- Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd, Wuhan, Hubei 430030 China
| | - Longxian Cheng
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 32 Xinhua Rd, Wuhan, Hubei 430030 China
| | - Daowen Wang
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, Hubei 430030 China
| | - Frank B. Hu
- Departments of Nutrition and Epidemiology, Harvard School of Public Health, Boston, MA 02115 USA
| | - Tangchun Wu
- Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Rd, Wuhan, Hubei 430030 China
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Jin SM, Park K. Acetaminophen induced cytotoxicity and altered gene expression in cultured cardiomyocytes of h(9)c(2) cells. ENVIRONMENTAL HEALTH AND TOXICOLOGY 2012; 27:e2012011. [PMID: 22639738 PMCID: PMC3355274 DOI: 10.5620/eht.2012.27.e2012011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Accepted: 02/23/2012] [Indexed: 05/27/2023]
Abstract
OBJECTIVES Hepatotoxicity of acetaminophen has been widely studied. However, the adverse effects on the heart have not been sufficiently evaluated. This study was performed to investigate cytotoxicity and alterations of gene expression in cultured cardiomyocytes (H(9)C(2) cells) after exposure to acetaminophen. METHODS H(9)C(2) cells were incubated in a 10 mM concentration of acetaminophen for the designated times (6, 12, and 24 hours), and cytotoxicity was determined by the 3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method. Alteration of gene expression was observed by microarray analysis, and RT-PCR was performed for the three representative oxidative stress-related genes at 24 hours after treatment. RESULTS It revealed that acetaminophen was toxic to cardiomyocytes, and numerous critical genes were affected. Induced genes included those associated with oxidative stress, DNA damage, and apoptosis. Repressed genes included those associated with cell proliferation, myocardial contraction, and cell shape control. CONCLUSIONS These findings provide the evidences of acetaminophen-induced cytotoxicity and changes in gene expression in cultured cardiomyocytes of H(9)C(2) cells.
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Affiliation(s)
- Seon Mi Jin
- Department of Pediatrics, Eulji University College of Medicine, Daejeon, Korea
| | - Kwangsik Park
- College of Pharmacy, Dongduk Women's University, Seoul, Korea
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Chen JH, Huang SM, Tan TW, Lin HY, Chen PY, Yeh WL, Chou SC, Tsai CF, Wei IH, Lu DY. Berberine induces heme oxygenase-1 up-regulation through phosphatidylinositol 3-kinase/AKT and NF-E2-related factor-2 signaling pathway in astrocytes. Int Immunopharmacol 2012; 12:94-100. [DOI: 10.1016/j.intimp.2011.10.019] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 10/20/2011] [Accepted: 10/27/2011] [Indexed: 01/13/2023]
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Abstract
The renin-angiotensin system (RAS) plays an important role in regulating blood pressure, water-salt balance and the pathogenesis of cardiovascular diseases. Angiotensin II (Ang II) is the physiologically active mediator and mediates the main pathophysiological actions in RAS. Ang II exerts the effects by activating its receptors, primarily type 1 (AT1R) and type 2 (AT2R). Most of the known pathophysiological effects of Ang II are mediated by AT1R activation. The precise physiological function of AT2R is still not clear. Generally, AT2R is considered to oppose the effects of AT1R. Lectin-like oxidized low-density lipoprotein scavenger receptor-1 (LOX-1) is one of the major receptors responsible for binding, internalizing and degrading ox-LDL. The activation of LOX-1 has been known to be related to many pathophysiological events, including endothelial dysfunction and injury, fibroblast growth, and vascular smooth muscle cell hypertrophy. Many of these alterations are present in atherosclerosis, hypertension, and myocardial ischemia and remodeling. A growing body of evidence suggests the existence of a cross-talk between LOX-1 and Ang II receptors. Their interplays are embodied in the reciprocal regulation of their expression and activity. Their interplays are involved in a series of signals. Recent studies suggests that reactive oxygen species (ROS), nitric oxide (NO), protein kinase C (PKC) and mitogen activated protein kinases (MAPKs) are important signals responsible for their cross-talk. This paper reviews these aspects of dyslipidemia and RAS activation.
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Affiliation(s)
- Xianwei Wang
- Division of Cardiology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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