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Wang N, Mao L, Yang L, Zou J, Liu K, Liu M, Zhang H, Xiao X, Wang K. Resveratrol protects against early polymicrobial sepsis-induced acute kidney injury through inhibiting endoplasmic reticulum stress-activated NF-κB pathway. Oncotarget 2018; 8:36449-36461. [PMID: 28430592 PMCID: PMC5482667 DOI: 10.18632/oncotarget.16860] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/26/2017] [Indexed: 01/20/2023] Open
Abstract
Resveratrol, a polyphenol compound derived from various edible plants, protects against sepsis-induced acute kidney injury (AKI) via its anti-inflammatory activity, but the underlying mechanisms remain largely unknown. In this study, a rat model of sepsis was established by cecal ligation and puncture (CLP), 30 mg/kg resveratrol was intraperitoneally administrated immediately after the CLP operation. HK-2 cells treated by 1 μg/ml lipopolysaccharide, 0.2 μM tunicamycin, 2.5 mM irestatin 9389 and 20 μM resveratrol were used for in vitro study. The results demonstrated that resveratrol significantly improved the renal function and tubular epithelial cell injury and enhanced the survival rate of CLP-induced rat model of sepsis, which was accompanied by a substantial decrease of the serum content and renal mRNA expressions of TNF-α, IL-1β and IL-6. In addition, resveratrol obviously relieved the endoplasmic reticulum stress, inhibited the phosphorylation of inositol-requiring enzyme 1(IRE1) and nuclear factor-κB (NF-κB) in the kidney. In vitro studies showed that resveratrol enhanced the cell viability, reduced the phosphorylation of NF-κB and production of inflammatory factors in lipopolysaccharide and tunicamycin-induced HK-2 cells through inhibiting IRE1 activation. Taken together, administration of resveratrol as soon as possible after the onset of sepsis could protect against septic AKI mainly through inhibiting IRE1-NF-κB pathway-triggered inflammatory response in the kidney. Resveratrol might be a readily translatable option to improve the prognosis of sepsis.
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Affiliation(s)
- Nian Wang
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Li Mao
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Liu Yang
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Jiang Zou
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Ke Liu
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Meidong Liu
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Huali Zhang
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Xianzhong Xiao
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
| | - Kangkai Wang
- Department of Pathophysiology, Xiangya School of Medicine, Translational Medicine Center of Sepsis, Central South University, Changsha, 410078, Hunan, China
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SLAB51 Probiotic Formulation Activates SIRT1 Pathway Promoting Antioxidant and Neuroprotective Effects in an AD Mouse Model. Mol Neurobiol 2018; 55:7987-8000. [PMID: 29492848 PMCID: PMC6132798 DOI: 10.1007/s12035-018-0973-4] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/19/2018] [Indexed: 02/06/2023]
Abstract
The gut-brain axis is a bidirectional communication network functionally linking the gut and the central nervous system (CNS). Based on this, the rational manipulation of intestinal microbiota represents a novel attractive therapeutic strategy for the treatment of CNS-associated disorders. In this study, we explored the properties of a probiotic formulation (namely SLAB51) in counteracting brain oxidative damages associated with Alzheimer's disease (AD). Specifically, transgenic AD mice (3xTg-AD) were treated with SLAB51 and the effects on protein oxidation, neuronal antioxidant defence and repair systems were monitored, with the particular focus on the role of SIRT1-related pathways. We demonstrated that SLAB51 markedly reduced oxidative stress in AD mice brain by activating SIRT1-dependent mechanisms, thus representing a promising therapeutic adjuvant in AD treatment.
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Regulation of Sirtuin-Mediated Protein Deacetylation by Cardioprotective Phytochemicals. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:1750306. [PMID: 29234485 PMCID: PMC5695026 DOI: 10.1155/2017/1750306] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/26/2017] [Accepted: 09/25/2017] [Indexed: 01/06/2023]
Abstract
Modulation of posttranslational modifications (PTMs), such as protein acetylation, is considered a novel therapeutic strategy to combat the development and progression of cardiovascular diseases. Protein hyperacetylation is associated with the development of numerous cardiovascular diseases, including atherosclerosis, hypertension, cardiac hypertrophy, and heart failure. In addition, decreased expression and activity of the deacetylases Sirt1, Sirt3, and Sirt6 have been linked to the development and progression of cardiac dysfunction. Several phytochemicals exert cardioprotective effects by regulating protein acetylation levels. These effects are mainly exerted via activation of Sirt1 and Sirt3 and inhibition of acetyltransferases. Numerous studies support a cardioprotective role for sirtuin activators (e.g., resveratrol), as well as other emerging modulators of protein acetylation, including curcumin, honokiol, oroxilyn A, quercetin, epigallocatechin-3-gallate, bakuchiol, tyrosol, and berberine. Studies also point to a cardioprotective role for various nonaromatic molecules, such as docosahexaenoic acid, alpha-lipoic acid, sulforaphane, and caffeic acid ethanolamide. Here, we review the vast evidence from the bench to the clinical setting for the potential cardioprotective roles of various phytochemicals in the modulation of sirtuin-mediated deacetylation.
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54
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Zhu H, Gao Y, Zhu S, Cui Q, Du J. Klotho Improves Cardiac Function by Suppressing Reactive Oxygen Species (ROS) Mediated Apoptosis by Modulating Mapks/Nrf2 Signaling in Doxorubicin-Induced Cardiotoxicity. Med Sci Monit 2017; 23:5283-5293. [PMID: 29107939 PMCID: PMC5687120 DOI: 10.12659/msm.907449] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background Anthracyclines-induced cardiotoxicity has become one of the major restrictions of their clinical applications. Klotho showed cardioprotective effects. This study aimed to investigate the effects and possible mechanisms of klotho on doxorubicin (DOX)-induced cardiotoxicity. Material/Methods Rats and isolated myocytes were exposed to DOX and treated with exogenous klotho. Specific inhibitors and siRNAs silencing MAPKs were also used to treat the animals and/or myocytes. An invasive hemodynamic method was used to determine cardiac functions. Intracellular ROS generation was evaluated by DHE staining. Western blotting was used to determine the phosphorylation levels of JNK, ERK, and p38 MAPKs in plasma extracts and Nrf2 in nuclear extracts. Nuclear translocation of Nrf2 in myocytes was evaluated by immunohistochemistry. Cell apoptosis was evaluated by TUNEL assay and flow cytometry. Results Klotho treatment improved DOX-induced cardiac dysfunction in rats. The DOX-induced ROS accumulation and cardiac apoptosis were attenuated by klotho. Impaired phosphorylations of MAPKs, Nrf2 translocation and expression levels of HO1 and Prx1 were also attenuated by klotho treatment. However, the anti-oxidant and anti-apoptotic effects of klotho on DOX-exposed myocardium and myocytes were impaired by both specific inhibitors and siRNAs against MAPKs. Moreover, the recovery effects of klotho on phosphorylations of MAPKs, Nrf2 translocation and expression levels of HO1 and Prx1 were also impaired by specific inhibitors and siRNAs against MAPKs. Conclusions By recovering the activation of MAPKs signaling, klotho improved cardiac function loss which was triggered by DOX-induced ROS mediated cardiac apoptosis.
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Affiliation(s)
- Huolan Zhu
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China (mainland)
| | - Yan Gao
- ECG Exam Room, Function Testing Lab, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China (mainland)
| | - Shunming Zhu
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China (mainland)
| | - Qianwei Cui
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China (mainland)
| | - Jie Du
- Health Examination Center, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China (mainland)
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Fernandes GFS, Silva GDB, Pavan AR, Chiba DE, Chin CM, Dos Santos JL. Epigenetic Regulatory Mechanisms Induced by Resveratrol. Nutrients 2017; 9:nu9111201. [PMID: 29104258 PMCID: PMC5707673 DOI: 10.3390/nu9111201] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/05/2017] [Accepted: 09/18/2017] [Indexed: 12/11/2022] Open
Abstract
Resveratrol (RVT) is one of the main natural compounds studied worldwide due to its potential therapeutic use in the treatment of many diseases, including cancer, diabetes, cardiovascular diseases, neurodegenerative diseases and metabolic disorders. Nevertheless, the mechanism of action of RVT in all of these conditions is not completely understood, as it can modify not only biochemical pathways but also epigenetic mechanisms. In this paper, we analyze the biological activities exhibited by RVT with a focus on the epigenetic mechanisms, especially those related to DNA methyltransferase (DNMT), histone deacetylase (HDAC) and lysine-specific demethylase-1 (LSD1).
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Affiliation(s)
- Guilherme Felipe Santos Fernandes
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800903 Araraquara, Brazil.
- Institute of Chemistry, São Paulo State University (UNESP), 14800060 Araraquara, Brazil.
| | | | - Aline Renata Pavan
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800903 Araraquara, Brazil.
| | - Diego Eidy Chiba
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800903 Araraquara, Brazil.
| | - Chung Man Chin
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800903 Araraquara, Brazil.
| | - Jean Leandro Dos Santos
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800903 Araraquara, Brazil.
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Jain A, Rani V. Mode of treatment governs curcumin response on doxorubicin-induced toxicity in cardiomyoblasts. Mol Cell Biochem 2017; 442:81-96. [DOI: 10.1007/s11010-017-3195-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 09/09/2017] [Indexed: 01/01/2023]
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Hwang ES, Song SB. Nicotinamide is an inhibitor of SIRT1 in vitro, but can be a stimulator in cells. Cell Mol Life Sci 2017; 74:3347-3362. [PMID: 28417163 PMCID: PMC11107671 DOI: 10.1007/s00018-017-2527-8] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 03/24/2017] [Accepted: 04/12/2017] [Indexed: 01/15/2023]
Abstract
Nicotinamide (NAM), a form of vitamin B3, plays essential roles in cell physiology through facilitating NAD+ redox homeostasis and providing NAD+ as a substrate to a class of enzymes that catalyze non-redox reactions. These non-redox enzymes include the sirtuin family proteins which deacetylate target proteins while cleaving NAD+ to yield NAM. Since the finding that NAM exerts feedback inhibition to the sirtuin reactions, NAM has been widely used as an inhibitor in the studies where SIRT1, a key member of sirtuins, may have a role in certain cell physiology. However, once administered to cells, NAM is rapidly converted to NAD+ and, therefore, the cellular concentration of NAM decreases rapidly while that of NAD+ increases. The result would be an inhibition of SIRT1 for a limited duration, followed by an increase in the activity. This possibility raises a concern on the validity of the interpretation of the results in the studies that use NAM as a SIRT1 inhibitor. To understand better the effects of cellular administration of NAM, we reviewed published literature in which treatment with NAM was used to inhibit SIRT1 and found that the expected inhibitory effect of NAM was either unreliable or muted in many cases. In addition, studies demonstrated NAM administration stimulates SIRT1 activity and improves the functions of cells and organs. To determine if NAM administration can generate conditions in cells and tissues that are stimulatory to SIRT1, the changes in the cellular levels of NAM and NAD+ reported in the literature were examined and the factors that are involved in the availability of NAD+ to SIRT1 were evaluated. We conclude that NAM treatment can hypothetically be stimulatory to SIRT1.
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Affiliation(s)
- Eun Seong Hwang
- Department of Life Science, University of Seoul, Dongdaemungu, 163 Seoulsiripdaero, Seoul, 02504, Republic of Korea.
| | - Seon Beom Song
- Department of Life Science, University of Seoul, Dongdaemungu, 163 Seoulsiripdaero, Seoul, 02504, Republic of Korea
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Dolinsky VW. The role of sirtuins in mitochondrial function and doxorubicin-induced cardiac dysfunction. Biol Chem 2017; 398:955-974. [PMID: 28253192 DOI: 10.1515/hsz-2016-0316] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 02/11/2017] [Indexed: 01/15/2023]
Abstract
Anthracycline chemotherapeutics such as doxorubicin continue to be important treatments for many cancers. Through improved screening and therapy, more patients are surviving and living longer after the diagnosis of their cancer. However, anthracyclines are associated with both short- and long-term cardiotoxic effects. Doxorubicin-induced mitochondrial dysfunction is a central mechanism in the cardiotoxic effects of doxorubicin that contributes to impaired cardiac energy levels, increased reactive oxygen species production, cardiomyocyte apoptosis and the decline in cardiac function. Sirtuins are protein deacetylases that are activated by low energy levels and stimulate energy production through their activation of transcription factors and enzymatic regulators of cardiac energy metabolism. In addition, sirtuins activate oxidative stress resistance pathways. SIRT1 and SIRT3 are expressed at high levels in the cardiomyocyte. This review examines the function of sirtuins in the regulation of cardiac mitochondrial function, with a focus on their role in heart failure and an emphasis on their effects on doxorubicin-induced cardiotoxicity. We discuss the potential for sirtuin activation in combination with anthracycline chemotherapy in order to mitigate its cardiotoxic side-effects without reducing the antineoplastic activity of anthracyclines.
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Zhou Y, Jia WK, Jian Z, Zhao L, Liu CC, Wang Y, Xiao YB. Downregulation of microRNA-199a-5p protects cardiomyocytes in cyanotic congenital heart disease by attenuating endoplasmic reticulum stress. Mol Med Rep 2017; 16:2992-3000. [DOI: 10.3892/mmr.2017.6934] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 05/09/2017] [Indexed: 11/06/2022] Open
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Hsp90 inhibitor geldanamycin attenuates the cytotoxicity of sunitinib in cardiomyocytes via inhibition of the autophagy pathway. Toxicol Appl Pharmacol 2017. [PMID: 28624441 DOI: 10.1016/j.taap.2017.06.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Sunitinib malate (sunitinib) is an orally available, multitargeted tyrosine kinase inhibitor with antitumor and antiangiogenic activities. Although sunitinib is effective for the treatment of patients with gastrointestinal stromal tumor, advanced renal cell carcinoma, or pancreatic neuroendocrine tumor, adverse cardiac events associated with sunitinib administration have been reported. Here, we examined the effect of geldanamycin, an inhibitor of heat shock protein (Hsp) 90, on sunitinib-induced cytotoxicity in cardiomyocytes. First, we found that treatment with geldanamycin or other Hsp90 inhibitors (tanespimycin, ganetespib, or BIIB021) significantly attenuated sunitinib-induced cytotoxicity in rat H9c2 cardiomyocytes, suggesting a drug-class effect of Hsp90 inhibitors. We then examined the mechanisms underlying sunitinib-induced cytotoxicity and found that sunitinib induced autophagy in H9c2 cells and that pretreatment with geldanamycin inhibited the induction of autophagy by promoting degradation of the autophagy-related proteins Atg7, Beclin-1, and ULK1. Pharmacological assessment with autophagy inhibitors confirmed that geldanamycin attenuated the cytotoxicity of sunitinib by interfering with autophagy. In addition, we found that the molecular chaperone Hsp70, which is induced by geldanamycin, was not involved in the attenuation of sunitinib-induced cytotoxicity. Finally, to provide more clinically relevant data, we confirmed that geldanamycin attenuated sunitinib-induced cytotoxicity in human induced pluripotent stem cell-derived cardiomyocytes. Together, these data suggest that geldanamycin attenuates sunitinib-induced cytotoxicity in cardiomyocytes by inhibiting the autophagy pathway. Thus, the further investigation of combination or sequential treatment with an Hsp90 inhibitor and sunitinib is warranted as a potential strategy of attenuating the cardiotoxicity associated with sunitinib administration in the clinical setting.
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Deng Z, Jin J, Wang Z, Wang Y, Gao Q, Zhao J. The metal nanoparticle-induced inflammatory response is regulated by SIRT1 through NF-κB deacetylation in aseptic loosening. Int J Nanomedicine 2017; 12:3617-3636. [PMID: 28553103 PMCID: PMC5439723 DOI: 10.2147/ijn.s124661] [Citation(s) in RCA: 38] [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] [Indexed: 12/20/2022] Open
Abstract
Aseptic loosening is the most common cause of total hip arthroplasty (THA) failure, and osteolysis induced by wear particles plays a major role in aseptic loosening. Various pathways in multiple cell types contribute to the pathogenesis of osteolysis, but the role of Sirtuin 1 (SIRT1), which can regulate inflammatory responses through its deacetylation, has never been investigated. We hypothesized that the downregulation of SIRT1 in macrophages induced by metal nanoparticles was one of the reasons for osteolysis in THA failure. In this study, the expression of SIRT1 was examined in macrophages stimulated with metal nanoparticles from materials used in prosthetics and in specimens from patients suffering from aseptic loosening. To address whether SIRT1 downregulation triggers these inflammatory responses, the effects of the SIRT1 activator resveratrol on the expression of inflammatory cytokines in metal nanoparticle-stimulated macrophages were tested. The results demonstrated that SIRT1 expression was significantly downregulated in metal nanoparticle-stimulated macrophages and clinical specimens of prosthesis loosening. Pharmacological activation of SIRT1 dramatically reduced the particle-induced expression of inflammatory cytokines in vitro and osteolysis in vivo. Furthermore, SIRT1 regulated particle-induced inflammatory responses through nuclear factor kappa B (NF-κB) acetylation. Thus, the results of this study suggest that SIRT1 plays a key role in metal nanoparticle-induced inflammatory responses and that targeting the SIRT1 pathway may lead to novel therapeutic approaches for the treatment of aseptic prosthesis loosening.
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Affiliation(s)
- Zhantao Deng
- Department of Orthopedics, Jinling Hospital, School of Medicine, Nanjing University
- Center for Translational Medicine, Nanjing University Medical School
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, Jiangsu, People’s Republic of China
| | - Jiewen Jin
- Center for Translational Medicine, Nanjing University Medical School
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, Jiangsu, People’s Republic of China
| | - Zhenheng Wang
- Department of Orthopedics, Jinling Hospital, School of Medicine, Nanjing University
| | - Yong Wang
- Center for Translational Medicine, Nanjing University Medical School
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, Jiangsu, People’s Republic of China
| | - Qian Gao
- Center for Translational Medicine, Nanjing University Medical School
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, Jiangsu, People’s Republic of China
| | - Jianning Zhao
- Department of Orthopedics, Jinling Hospital, School of Medicine, Nanjing University
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Akolkar G, Bagchi AK, Ayyappan P, Jassal DS, Singal PK. Doxorubicin-induced nitrosative stress is mitigated by vitamin C via the modulation of nitric oxide synthases. Am J Physiol Cell Physiol 2017; 312:C418-C427. [DOI: 10.1152/ajpcell.00356.2016] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/12/2017] [Accepted: 01/12/2017] [Indexed: 12/14/2022]
Abstract
An increase in oxidative stress is suggested to be the main cause in Doxorubicin (Dox)–induced cardiotoxicity. However, there is now evidence that activation of inducible nitric oxide synthase (iNOS) and nitrosative stress are also involved. The role of vitamin C (Vit C) in the regulation of nitric oxide synthase (NOS) and reduction of nitrosative stress in Dox-induced cardiotoxicity is unknown. The present study investigated the effects of Vit C in the mitigation of Dox-induced changes in the levels of nitric oxide (NO), NOS activity, protein expression of NOS isoforms, and nitrosative stress as well as cytokines TNF-α and IL-10 in isolated cardiomyocytes. Cardiomyocytes isolated from adult Sprague-Dawley rats were segregated into four groups: 1) control, 2) Vit C (25 µM), 3) Dox (10 µM), and 4) Vit C + Dox. Dox caused a significant increase in the generation of superoxide radical (O2·−), peroxynitrite, and NO, and these effects of Dox were blunted by Vit C. Dox increased the expression of iNOS and altered protein expression as well as activation of endothelial NOS (eNOS). These changes were prevented by Vit C. Dox induced an increase in the ratio of monomeric/dimeric eNOS, promoting the production of O2·−, which was prevented by Vit C by increasing the stability of the dimeric form of eNOS. Vit C protected against the Dox-induced increase in TNFα as well as a reduction in IL-10. These results suggest that Vit C provides cardioprotection by reducing oxidative/nitrosative stress and inflammation via a modulation of Dox-induced increase in the NO levels and NOS activity.
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Affiliation(s)
- Gauri Akolkar
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Ashim K. Bagchi
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Prathapan Ayyappan
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Davinder S. Jassal
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Pawan K. Singal
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
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Liu MH, Shan J, Li J, Zhang Y, Lin XL. Resveratrol inhibits doxorubicin-induced cardiotoxicity via sirtuin 1 activation in H9c2 cardiomyocytes. Exp Ther Med 2016; 12:1113-1118. [PMID: 27446329 DOI: 10.3892/etm.2016.3437] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 04/25/2016] [Indexed: 12/22/2022] Open
Abstract
Doxorubicin (DOX) is an efficient drug used in cancer therapy; however, it can induce severe cytotoxicity, which limits its clinical application. In the present study, the effects of resveratrol (RES) on sirtuin 1 (SIRT1) activation in mediating DOX-induced cytotoxicity in H9c2 cardiac cells was investigated. H9c2 cells were exposed to 5 µM DOX for 24 h to establish a model of DOX cardiotoxicity. Apoptosis of H9c2 cardiomyocytes was assessed using the MTT assay and Hoechst nuclear staining. The results demonstrated that pretreating H9c2 cells with RES prior to the exposure of DOX resulted in increased cell viability and a decreased quantity of apoptotic cells. Western blot analysis demonstrated that DOX decreased the expression level of SIRT1. These effects were significantly alleviated by co-treatment with RES. In addition, the results demonstrated that DOX administration amplified forkhead box O1 (FoxO1) and P53 expression levels in H9c2 cells. RES was also found to protect against DOX-induced increases of FoxO1 and P53 expression levels in H9c2 cells. Furthermore, the protective effects of RES were arrested by the SIRT1 inhibitor nicotinamide. In conclusion, the results demonstrated that RES protected H9c2 cells against DOX-induced injuries via SIRT1 activation.
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Affiliation(s)
- Mi-Hua Liu
- Department of Clinical Laboratory, Affiliated Nanhua Hospital, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Jian Shan
- Department of Pathology, Zhongshan Torch Development Zone Hospital, Zhongshan, Guangdong 528437, P.R. China
| | - Jian Li
- Department of Ultrasonic Diagnosis, Bo'Ai Hospital of Zhongshan, Zhongshan, Guangdong 528403, P.R. China
| | - Yuan Zhang
- Department of Pathology, Mawangdui Hospital, Changsha, Hunan 410016, P.R. China
| | - Xiao-Long Lin
- Department of Pathology, The Third People's Hospital of Huizhou, Affiliated Huizhou Hospital of Guangzhou Medical University, Huizhou, Guangdong 516002, P.R. China
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Huffman DM, Schafer MJ, LeBrasseur NK. Energetic interventions for healthspan and resiliency with aging. Exp Gerontol 2016; 86:73-83. [PMID: 27260561 DOI: 10.1016/j.exger.2016.05.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/03/2016] [Accepted: 05/24/2016] [Indexed: 12/16/2022]
Abstract
Several behavioral and pharmacological strategies improve longevity, which is indicative of delayed organismal aging, with the most effective interventions extending both life- and healthspan. In free living creatures, maintaining health and function into old age requires resilience against a multitude of stressors. Conversely, in experimental settings, conventional housing of rodents limits exposure to such challenges, thereby obscuring an accurate assessment of resilience. Caloric restriction (CR) and exercise, as well as pharmacologic strategies (resveratrol, rapamycin, metformin, senolytics), are well established to improve indices of health and aging, but some paradoxical effects have been observed on resilience. For instance, CR potently retards the onset of age-related diseases, and improves lifespan to a greater extent than exercise in a variety of models. However, exercise has proven more consistently beneficial to organismal resilience against a broad array of stressors, including infections, surgery, wound healing and frailty. CR can improve cellular stress defenses and protect from frailty, but also impairs the response to infections, bed rest and healing. How an intervention will impact not only longevity, health and function, but also resiliency, is critical to better understanding translational implications. Thus, organismal robustness represents a critical, albeit understudied aspect of aging, which needs more careful attention in order to better inform on how putative age-delaying strategies will impact preservation of health and function in response to stressors with aging in humans.
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Affiliation(s)
- Derek M Huffman
- Department of Molecular Pharmacology and Medicine, Albert Einstein College of Medicine, Bronx, NY, USA; Institute for Aging Research, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Marissa J Schafer
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
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Varoni EM, Lo Faro AF, Sharifi-Rad J, Iriti M. Anticancer Molecular Mechanisms of Resveratrol. Front Nutr 2016; 3:8. [PMID: 27148534 PMCID: PMC4828556 DOI: 10.3389/fnut.2016.00008] [Citation(s) in RCA: 228] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 03/23/2016] [Indexed: 01/07/2023] Open
Abstract
Resveratrol is a pleiotropic phytochemical belonging to the stilbene family. Though it is only significantly present in grape products, a huge amount of preclinical studies investigated its anticancer properties in a plethora of cellular and animal models. Molecular mechanisms of resveratrol involved signaling pathways related to extracellular growth factors and receptor tyrosine kinases; formation of multiprotein complexes and cell metabolism; cell proliferation and genome instability; cytoplasmic tyrosine kinase signaling (cytokine, integrin, and developmental pathways); signal transduction by the transforming growth factor-β super-family; apoptosis and inflammation; and immune surveillance and hormone signaling. Resveratrol also showed a promising role to counteract multidrug resistance: in adjuvant therapy, associated with 5-fluoruracyl and cisplatin, resveratrol had additive and/or synergistic effects increasing the chemosensitization of cancer cells. Resveratrol, by acting on diverse mechanisms simultaneously, has been emphasized as a promising, multi-target, anticancer agent, relevant in both cancer prevention and treatment.
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Affiliation(s)
- Elena M Varoni
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano , Milan , Italy
| | - Alfredo Fabrizio Lo Faro
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano , Milan , Italy
| | - Javad Sharifi-Rad
- Zabol Medicinal Plants Research Center, Zabol University of Medical Sciences, Zabol, Iran; Department of Pharmacognosy, Faculty of Pharmacy, Zabol University of Medical Sciences, Zabol, Iran
| | - Marcello Iriti
- Dipartimento di Scienze Agrarie e Ambientali, Università degli Studi di Milano , Milan , Italy
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Gaballah HH, Zakaria SS, Elbatsh MM, Tahoon NM. Modulatory effects of resveratrol on endoplasmic reticulum stress-associated apoptosis and oxido-inflammatory markers in a rat model of rotenone-induced Parkinson's disease. Chem Biol Interact 2016; 251:10-6. [PMID: 27016191 DOI: 10.1016/j.cbi.2016.03.023] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/15/2016] [Accepted: 03/21/2016] [Indexed: 12/21/2022]
Abstract
The mechanisms leading to neuronal death in Parkinson's disease (PD) are not fully elucidated; however, mounting evidence implicates endoplasmic reticulum (ER) stress, oxidative damage, and inflammatory changes are the crucial factors in its pathogenesis. This study was undertaken to investigate the modulatory effects of resveratrol on ER stress-mediated apoptosis, inflammatory and oxidative stress markers in a rat model of rotenone-induced PD. mRNA expression levels of ER stress markers; C/EBP homologous protein (CHOP) and glucose-regulated protein 78 (GRP78), were estimated in the rat brain using quantitative real-time PCR. Caspase-3 activity, IL-1β levels and Nuclear Factor Erythroid 2-related factor (Nrf2) DNA-binding activity were estimated by ELISA, while glutathione peroxidase and Xanthine oxidase activities, as well as protein carbonyl contents in the rat brain were evaluated spectrophotometrically. Our data revealed that Resveratrol ameliorated rotenone-induced ER stress by downregulating CHOP and GRP78 genes expression and hampered caspase-3 activity in the brain of rotenone exposed rats. It also restored redox balance as evident by suppressing Xanthine oxidase activity and protein carbonyls formation; in addition to preservation of intracellular antioxidants status via activating glutathione peroxidase and Nrf2 signaling pathway. In conclusion; our study launched promising avenues for the potential use of resveratrol as a neuroprotective therapeutic agent in Parkinson's disease.
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Affiliation(s)
| | - Soha Said Zakaria
- Medical Biochemistry Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Maha M Elbatsh
- Clinical Pharmacology Department, Faculty of Medicine, Menoufia University, Egypt
| | - Nahid M Tahoon
- Physiology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
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Malkapuram S, Venkataram K, Tongaonkar R, Taran S, Kolla L, Rajagopala L. Green Coffee Extract Protects H9C2 Cardiomyocytes from Doxorubicin Induced Apoptosis. ACTA ACUST UNITED AC 2016. [DOI: 10.3923/rjmp.2016.89.97] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Cappetta D, Esposito G, Piegari E, Russo R, Ciuffreda LP, Rivellino A, Berrino L, Rossi F, De Angelis A, Urbanek K. SIRT1 activation attenuates diastolic dysfunction by reducing cardiac fibrosis in a model of anthracycline cardiomyopathy. Int J Cardiol 2015; 205:99-110. [PMID: 26730840 DOI: 10.1016/j.ijcard.2015.12.008] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 12/04/2015] [Accepted: 12/12/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Doxorubicin (DOXO) is an effective anti-neoplastic drug but its clinical benefits are hampered by cardiotoxicity. Oxidative stress, apoptosis and myocardial fibrosis mediate the anthracycline cardiomyopathy. ROS trigger TGF-β pathway that activates cardiac fibroblasts promoting fibrosis. Myocardial stiffness contributes to diastolic dysfunction, less studied aspect of anthracycline cardiomyopathy. Considering the role of SIRT1 in the inhibition of the TGF-β/SMAD3 pathway, resveratrol (RES), a SIRT1 activator, might improve cardiac function by interfering with the development of cardiac fibrosis in a model of DOXO-induced cardiomyopathy. METHODS F344 rats received a cumulative dose of 15 mg/kg of DOXO in 2 weeks or DOXO+RES (DOXO and RES, 2.5mg/kg/day, concomitantly for 2 weeks and then RES alone for 1 more week). The effects of RES on cardiac fibroblasts were also tested in vitro. RESULTS Along with systolic dysfunction, DOXO was also responsible of diastolic abnormalities. Myocardial stiffness correlated with fibroblast activation and collagen deposition. DOXO+RES co-treatment significantly improved ± dP/dt and, more interestingly, ameliorated end-diastolic pressure/volume relationship. Treatment with RES resulted in reduced fibrosis and fibroblast activation and, most importantly, the mortality rate was significantly reduced in DOXO+RES group. Fibroblasts isolated from DOXO+RES-treated rats, in which SIRT1 was upregulated, showed decreased levels of TGF-β and pSMAD3/SMAD3 when compared to cells isolated from DOXO-exposed hearts. CONCLUSIONS Our findings reveal a key role of SIRT1 in supporting animal survival and functional parameters of the heart. SIRT1 activation by interfering with fibrogenesis can improve relaxation properties of myocardium and attenuate myocardial remodeling related to chemotherapy.
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Affiliation(s)
- Donato Cappetta
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Grazia Esposito
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Elena Piegari
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Rosa Russo
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Loreta Pia Ciuffreda
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Alessia Rivellino
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Liberato Berrino
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Francesco Rossi
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
| | - Antonella De Angelis
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy.
| | - Konrad Urbanek
- Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Via Costantinopoli 16, 80138 Naples, Italy
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