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Felipe Perez R, Mochi G, Khan A, Woodford M. Mitochondrial Chaperone Code: Just warming up. Cell Stress Chaperones 2024; 29:483-496. [PMID: 38763405 PMCID: PMC11153887 DOI: 10.1016/j.cstres.2024.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/21/2024] Open
Abstract
More than 99% of the mitochondrial proteome is encoded by the nucleus and requires refolding following import. Therefore, mitochondrial proteins require the coordinated action of molecular chaperones for their folding and activation. Several heat shock protein (Hsp) molecular chaperones, including members of the Hsp27, Hsp40/70, and Hsp90 families, as well as the chaperonin complex Hsp60/10 have an established role in mitochondrial protein import and folding. The "Chaperone Code" describes the regulation of chaperone activity by dynamic post-translational modifications; however, little is known about the post-translational regulation of mitochondrial chaperones. Dissecting the regulation of chaperone function is essential for understanding their differential regulation in pathogenic conditions and the potential development of efficacious therapeutic strategies. Here, we summarize the recent literature on post-translational regulation of mitochondrial chaperones, the consequences for mitochondrial function, and potential implications for disease.
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Affiliation(s)
- R Felipe Perez
- Department of Urology, Upstate Medical University, Syracuse, NY, USA
| | - Gianna Mochi
- Department of Urology, Upstate Medical University, Syracuse, NY, USA; Department of Biochemistry & Molecular Biology, Upstate Medical University, Syracuse, NY, USA; Upstate Cancer Center, State University of New York, Upstate Medical University, Syracuse, NY, USA
| | - Ariba Khan
- Department of Urology, Upstate Medical University, Syracuse, NY, USA
| | - Mark Woodford
- Department of Urology, Upstate Medical University, Syracuse, NY, USA; Department of Biochemistry & Molecular Biology, Upstate Medical University, Syracuse, NY, USA; Upstate Cancer Center, State University of New York, Upstate Medical University, Syracuse, NY, USA.
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2
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Wang N, Liu X, Liu K, Wang K, Zhang H. Homo-oxidized HSPB1 protects H9c2 cells against oxidative stress via activation of KEAP1/NRF2 signaling pathway. iScience 2023; 26:107443. [PMID: 37575200 PMCID: PMC10415933 DOI: 10.1016/j.isci.2023.107443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 05/02/2023] [Accepted: 07/18/2023] [Indexed: 08/15/2023] Open
Abstract
Several heat shock proteins are implicated in the endogenous cardioprotective mechanisms, but little is known about the role of heat shock protein beta-1 (HSPB1). This study aims to investigate the oxidation state and role of HSPB1 in cardiomyocytes undergoing oxidative stress and underlying mechanisms. Here, we demonstrate that hydrogen peroxide (H2O2) promotes the homo-oxidation of HSPB1. Cys137 residue of HSPB1 is not only required for it to protect cardiomyocytes against oxidative injury but also modulates its oxidation, phosphorylation at Ser15, and distribution to insoluble cell components after H2O2 treatment. Moreover, Cys137 residue is indispensable for HSPB1 to interact with KEAP1, thus regulating its oxidation and intracellular distribution, subsequently promoting the nuclear translocation of NRF2, and increasing the transcription of GLCM, HMOX1, and TXNRD1. Altogether, these findings provide evidence that Cys137 residue is indispensable for HSPB1 to maintain its redox state and antioxidant activity via activating KEAP1/NRF2 signaling cascade in cardiomyocytes.
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Affiliation(s)
- Nian Wang
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China
- Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, Hunan 410078, P.R. China
- National Medicine Functional Experimental Teaching Center, Central South University, Changsha, Hunan 410078, P.R. China
| | - Xiehong Liu
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China
- Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, Hunan 410078, P.R. China
- National Medicine Functional Experimental Teaching Center, Central South University, Changsha, Hunan 410078, P.R. China
| | - Ke Liu
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China
- Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, Hunan 410078, P.R. China
- National Medicine Functional Experimental Teaching Center, Central South University, Changsha, Hunan 410078, P.R. China
| | - Kangkai Wang
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China
- Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, Hunan 410078, P.R. China
- National Medicine Functional Experimental Teaching Center, Central South University, Changsha, Hunan 410078, P.R. China
| | - Huali Zhang
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China
- Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, Hunan 410078, P.R. China
- National Medicine Functional Experimental Teaching Center, Central South University, Changsha, Hunan 410078, P.R. China
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3
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Karademir D, Özgür A. Small molecule heat shock protein 27 inhibitor J2 decreases ovarian cancer cell proliferation via induction of apoptotic pathways. Med Oncol 2023; 40:250. [PMID: 37493998 DOI: 10.1007/s12032-023-02126-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 07/13/2023] [Indexed: 07/27/2023]
Abstract
Heat shock protein 27 (Hsp27) is an important member of the chaperone protein family and its overexpression promotes cancer cell survival. Here, we investigated the apoptosis inducer role of the J2 compound (Hsp27 inhibitor) in human ovarian cancer cell lines (SKOV3 and OVCAR-3). Cell proliferation was measured by MTT assay. The parameters of J2-Hsp27 interaction were determined with molecular docking calculation. The inhibitory effect of the J2 compound on Hsp27 chaperone activity was investigated by luciferase activity assay. Finally, the apoptotic inducer role of the J2 compound on SKOV3 and OVCAR-3 cells was determined by RT-PCR and caspase-3 activity assay. J2 compound decreased SKOV3 and OVCAR-3 cell proliferation in a dose-dependent manner at 48 h with IC50 values of 17.34 µM and 12.63 µM, respectively. J2 inhibited the refolding process of denatured luciferase as an Hsp27 inhibitor. Molecular docking calculation was carried out to determine the interaction between Hsp27 and J2. The results indicated that J2 selectively binds to the phosphorylation site of the Hsp27 and inhibits the phosphorylation process of Hsp27. To determine the apoptotic potential of the J2 compound against ovarian cancer cells, the mRNA expression levels of apoptotic and antiapoptotic markers (Bax, Bcl-2, Bcl-xL, Cyt-c, p53, Apaf-1, Cas-3, Cas-8, Cas-9, TNF-α, DAXX, and Ask-1) were measured using RT-PCR. While J2 increased the expressions of apoptotic genes, it decreased the expressions of anti-apoptotic genes. Further, the J2 compound increased Cas-3 activity in SKOV3 and OVCAR-3 at 5.52 and 4.12 folds, respectively. These results confirm that J2 has great potential and significance in the stimulation of apoptosis in ovarian cancer cells as an Hsp27 inhibitor.
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Affiliation(s)
- Dilay Karademir
- Faculty of Medicine, Department of Gynecology and Obstetrics, Sivas Cumhuriyet University, Sivas, Turkey.
| | - Aykut Özgür
- Artova Vocational School, Department of Veterinary Medicine, Laboratory and Veterinary Health Program, Tokat Gaziosmanpasa University, Tokat, Turkey
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4
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Chakafana G, Spracklen TF, Kamuli S, Zininga T, Shonhai A, Ntusi NAB, Sliwa K. Heat Shock Proteins: Potential Modulators and Candidate Biomarkers of Peripartum Cardiomyopathy. Front Cardiovasc Med 2021; 8:633013. [PMID: 34222357 PMCID: PMC8241919 DOI: 10.3389/fcvm.2021.633013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 05/06/2021] [Indexed: 12/31/2022] Open
Abstract
Peripartum cardiomyopathy (PPCM) is a potentially life-threatening condition in which heart failure and systolic dysfunction occur late in pregnancy or within months following delivery. To date, no reliable biomarkers or therapeutic interventions for the condition exist, thus necessitating an urgent need for identification of novel PPCM drug targets and candidate biomarkers. Leads for novel treatments and biomarkers are therefore being investigated worldwide. Pregnancy is generally accompanied by dramatic hemodynamic changes, including a reduced afterload and a 50% increase in cardiac output. These increased cardiac stresses during pregnancy potentially impair protein folding processes within the cardiac tissue. The accumulation of misfolded proteins results in increased toxicity and cardiac insults that trigger heart failure. Under stress conditions, molecular chaperones such as heat shock proteins (Hsps) play crucial roles in maintaining cellular proteostasis. Here, we critically assess the potential role of Hsps in PPCM. We further predict specific associations between the Hsp types Hsp70, Hsp90 and small Hsps with several proteins implicated in PPCM pathophysiology. Furthermore, we explore the possibility of select Hsps as novel candidate PPCM biomarkers and drug targets. A better understanding of how these Hsps modulate PPCM pathogenesis holds promise in improving treatment, prognosis and management of the condition, and possibly other forms of acute heart failure.
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Affiliation(s)
- Graham Chakafana
- Department of Medicine, Faculty of Health Sciences, Cape Heart Institute, University of Cape Town, Cape Town, South Africa.,Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Timothy F Spracklen
- Department of Medicine, Faculty of Health Sciences, Cape Heart Institute, University of Cape Town, Cape Town, South Africa.,Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Stephen Kamuli
- Department of Medicine, Faculty of Health Sciences, Cape Heart Institute, University of Cape Town, Cape Town, South Africa.,Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Tawanda Zininga
- Department of Biochemistry, Stellenbosch University, Stellenbosch, South Africa
| | - Addmore Shonhai
- Department of Biochemistry, University of Venda, Thohoyandou, South Africa
| | - Ntobeko A B Ntusi
- Department of Medicine, Faculty of Health Sciences, Cape Heart Institute, University of Cape Town, Cape Town, South Africa.,Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,Cape Universities Body Imaging Centre, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Karen Sliwa
- Department of Medicine, Faculty of Health Sciences, Cape Heart Institute, University of Cape Town, Cape Town, South Africa.,Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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Taghavizadeh Yazdi ME, Amiri MS, Nourbakhsh F, Rahnama M, Forouzanfar F, Mousavi SH. Bio-indicators in cadmium toxicity: Role of HSP27 and HSP70. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:26359-26379. [PMID: 33834331 DOI: 10.1007/s11356-021-13687-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
Heat shock proteins (HSPs) are a family of proteins that are expressed by cells in reply to stressors. The changes in concentration of HSPs could be utilized as a bio-indicator of oxidative stress caused by heavy metal. Exposure to the different heavy metals may induce or reduce the expression of different HSPs. The exposure to cadmium ion (Cd2+) could increase HSP70 and HSP27 over 2- to 10-fold or even more. The in vitro and in vivo models indicate that the HSP70 family is more sensitive to Cd intoxication than other HSPs. The analyses of other HSPs along with HSP70, especially HSP27, could also be useful to obtain more accurate results. In this regard, this review focuses on examining the literature to bold the futuristic uses of HSPs as bio-indicators in the initial assessment of Cd exposure risks in defined environments.
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Affiliation(s)
| | | | - Fahimeh Nourbakhsh
- Medical Toxicology Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mostafa Rahnama
- Department of Plant Pathology, University of Kentucky, Lexington, KY, 40506, USA
| | - Fatemeh Forouzanfar
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Neuroscience, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Hadi Mousavi
- Medical Toxicology Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
- Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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6
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Ramani S, Park S. HSP27 role in cardioprotection by modulating chemotherapeutic doxorubicin-induced cell death. J Mol Med (Berl) 2021; 99:771-784. [PMID: 33728476 DOI: 10.1007/s00109-021-02048-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 01/19/2023]
Abstract
The common phenomenon expected from any anti-cancer drug in use is to kill the cancer cells without any side effects to non-malignant cells. Doxorubicin is an anthracycline derivative anti-cancer drug active over different types of cancers with anti-cancer activity but attributed to unintended cytotoxicity and genotoxicity triggering mitogenic signals inducing apoptosis. Administration of doxorubicin tends to both acute and chronic toxicity resulting in cardiomyopathy (left ventricular dysfunction) and congestive heart failure (CHF). Cardiotoxicity is prevented through administration of different cardioprotectants along with the drug. This review elaborates on mechanism of drug-mediated cardiotoxicity and attenuation principle by different cardioprotectants, with a focus on Hsp27 as cardioprotectant by prevention of drug-induced oxidative stress, cell survival pathways with suppression of intrinsic cell death. In conclusion, Hsp27 may offer an exciting/alternating cardioprotectant, with a wider study being need of the hour, specifically on primary cell line and animal models in conforming its cardioprotectant behaviour.
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Affiliation(s)
- Sivasubramanian Ramani
- Department of Food Science and Biotechnology, Sejong University, 209 Neungdong-ro, Seoul, 05006, South Korea
| | - Sungkwon Park
- Department of Food Science and Biotechnology, Sejong University, 209 Neungdong-ro, Seoul, 05006, South Korea.
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Sharma L, Shukla G. Placental Malaria: A New Insight into the Pathophysiology. Front Med (Lausanne) 2017; 4:117. [PMID: 28791290 PMCID: PMC5524764 DOI: 10.3389/fmed.2017.00117] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/11/2017] [Indexed: 12/30/2022] Open
Abstract
Malaria in pregnancy poses a great health risk to mother and her fetus and results into complications, such as abortion, still birth, intra uterine growth retardation, and low birth weight. The heavy infiltration of Plasmodium falciparum-infected RBCs in the intervillous spaces of placenta seems to be responsible for all the complications observed. Infected RBCs in the placenta cause an inflammatory environment with increase in inflammatory cells and cytokines which is deleterious to the placenta. Increased inflammatory responses in the infected placenta result into oxidative stress that in turn causes oxidative stress-induced placental cell death. Moreover, heat shock proteins that are produced in high concentration in stressed cells to combat the stress have been reported in fewer concentrations in malaria-infected placenta. Pathologies associated with placental malaria seems to be the effect of a change in immune status from antibody-mediated immune response to cell-mediated immune response resulting into excess inflammation, oxidative stress, apoptosis, and decreased heat shock protein expression. However, we also need to study other aspects of pathologies so that better drugs can be designed with new molecular targets.
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Affiliation(s)
- Lalita Sharma
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Geeta Shukla
- Department of Microbiology, Panjab University, Chandigarh, India
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Curcumin Attenuated Bupivacaine-Induced Neurotoxicity in SH-SY5Y Cells Via Activation of the Akt Signaling Pathway. Neurochem Res 2016; 41:2425-32. [PMID: 27233246 DOI: 10.1007/s11064-016-1955-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 04/06/2016] [Accepted: 05/11/2016] [Indexed: 10/21/2022]
Abstract
Bupivacaine is widely used for regional anesthesia, spinal anesthesia, and pain management. However, bupivacaine could cause neuronal injury. Curcumin, a low molecular weight polyphenol, has a variety of bioactivities and may exert neuroprotective effects against damage induced by some stimuli. In the present study, we tested whether curcumin could attenuate bupivacaine-induced neurotoxicity in SH-SY5Y cells. Cell injury was evaluated by examining cell viability, mitochondrial damage and apoptosis. We also investigated the levels of activation of the Akt signaling pathway and the effect of Akt inhibition by triciribine on cell injury following bupivacaine and curcumin treatment. Our findings showed that the bupivacaine treatment could induce neurotoxicity. Pretreatment of the SH-SY5Y cells with curcumin significantly attenuated bupivacaine-induced neurotoxicity. Interestingly, the curcumin treatment increased the levels of Akt phosphorylation. More significantly, the pharmacological inhibition of Akt abolished the cytoprotective effect of curcumin against bupivacaine-induced cell injury. Our data suggest that pretreating SH-SY5Y cells with curcumin provides a protective effect on bupivacaine-induced neuronal injury via activation of the Akt signaling pathway.
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Choudhary I, Lee H, Pyo MJ, Heo Y, Bae SK, Kwon YC, Yoon WD, Kang C, Kim E. Proteomics approach to examine the cardiotoxic effects of Nemopilema nomurai Jellyfish venom. J Proteomics 2015; 128:123-31. [PMID: 26193491 DOI: 10.1016/j.jprot.2015.07.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Revised: 07/07/2015] [Accepted: 07/13/2015] [Indexed: 01/19/2023]
Abstract
UNLABELLED Nemopilema nomurai is one of the largest species of jellyfish in the world. It blooms mainly offshore of Korea, China, and Japan. Increasing population numbers of N. nomurai is increasing the risk of sea bathers to the jellyfish stings and accompanying envenomations. Cardiovascular effects, and cytotoxicity and hemolytic activities have been previously reported in rodent models. To understand the mechanism of cardiac toxicity, we examined the effect of N. nomurai jellyfish venom (NnV) at the proteome level on rat cardiomyocytes cell line H9c2 using two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/MS). Cells treated with NnV displayed dose-dependent inhibition of viability. Cellular changes at proteome level were investigated after 6h and 12h of venom treatment. Electrophoretic examination revealed 72 protein spots displaying significant quantitative changes. These proteins were analyzed by MALDI-TOF/MS. Thirty four differentially expressed proteins were successfully identified; 24 proteins increased in quantity and 10 proteins decreased, compared to the respective controls. Proteins altered in content in Western blot analyses included myosin VII, annexin A2, aldose reductase, suppressor of cytokine signaling 1 (SOCS1), and calumenin, which are well-known marker proteins of cardiac dysfunctions. BIOLOGICAL SIGNIFICANCE This is the first report revealing the cardiac toxicity of NnV at the proteome level. NnV directly targeted proteins involved in cardiac dysfunction or maintenance. Suppressor of cytokine signaling 1 (SOCS1), which inhibits the Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway, was upregulated by NnV. Other proteins related to cardiac arrest that were over-expressed included aldose reductase and calumenin. These results clarify the underlying mechanism of cardiomyocyte damage caused by NnV. By inhibiting these particular targets and more precisely identifying the components of NnV-mediated cardiac toxicity, jellyfish venom-associated poisoning could be reduced or prevented.
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Affiliation(s)
- Indu Choudhary
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Hyunkyoung Lee
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Min-Jung Pyo
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Yunwi Heo
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Seong Kyeong Bae
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Young Chul Kwon
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Won Duk Yoon
- Headquarters for Marine Environment, National Fisheries Research & Development Institute, Shiran-ri, Gijang-eup, Gijang-gun, Busan 619-705, Republic of Korea
| | - Changkeun Kang
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea; Institutes of Agriculture and Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Euikyung Kim
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea; Institute of Animal Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea.
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10
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Chen YY, Li Q, Pan CS, Yan L, Fan JY, He K, Sun K, Liu YY, Chen QF, Bai Y, Wang CS, He B, Lv AP, Han JY. QiShenYiQi Pills, a compound in Chinese medicine, protects against pressure overload-induced cardiac hypertrophy through a multi-component and multi-target mode. Sci Rep 2015; 5:11802. [PMID: 26136154 PMCID: PMC4488877 DOI: 10.1038/srep11802] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 06/02/2015] [Indexed: 12/31/2022] Open
Abstract
The present study aimed to explore the holistic mechanism for the antihypertrophic effect of a compound in Chinese medicine, QiShenYiQi Pills (QSYQ) and the contributions of its components to the effect in rats with cardiac hypertrophy (CH). After induction of CH by ascending aortic stenosis, rats were treated with QSYQ, each identified active ingredient (astragaloside IV, 3, 4-dihydroxy-phenyl lactic acid or notoginsenoside R1) from its 3 major herb components or dalbergia odorifera, either alone or combinations, for 1 month. QSYQ markedly attenuated CH, as evidenced by echocardiography, morphology and biochemistry. Proteomic analysis and western blot showed that the majority of differentially expressed proteins in the heart of QSYQ-treated rats were associated with energy metabolism or oxidative stress. Each ingredient alone or their combinations exhibited similar effects as QSYQ but to a lesser extent and differently with astragaloside IV and notoginsenoside R1 being more effective for enhancing energy metabolism, 3, 4-dihydroxy-phenyl lactic acid more effective for counteracting oxidative stress while dalbergia odorifera having little effect on the variables evaluated. In conclusion, QSYQ exerts a more potent antihypertrophic effect than any of its ingredients or their combinations, due to the interaction of its active components through a multi-component and multi-target mode.
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Affiliation(s)
- Yuan-Yuan Chen
- 1] Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing, China [2] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [3] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [4] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Quan Li
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Chun-Shui Pan
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Li Yan
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Jing-Yu Fan
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Ke He
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Kai Sun
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Yu-Ying Liu
- 1] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [2] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [3] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Qing-Fang Chen
- 1] Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing, China [2] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [3] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [4] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Yan Bai
- Institute of Vascular Medicine, Peking University Third Hospital and Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptide, Ministry of Health, Beijing, China
| | - Chuan-She Wang
- 1] Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing, China [2] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [3] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [4] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
| | - Bing He
- The School of Chinese Medicine of Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Ai-Ping Lv
- The School of Chinese Medicine of Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Jing-Yan Han
- 1] Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing, China [2] Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China [3] Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of China, Beijing, China [4] Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of China, Beijing, China
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11
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Tyrosol prevents ischemia/reperfusion-induced cardiac injury in H9c2 cells: involvement of ROS, Hsp70, JNK and ERK, and apoptosis. Molecules 2015; 20:3758-75. [PMID: 25723850 PMCID: PMC6272375 DOI: 10.3390/molecules20033758] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Revised: 01/15/2015] [Accepted: 02/04/2015] [Indexed: 12/20/2022] Open
Abstract
Ischemia-Reperfusion (I/R) injury causes ROS overproduction, creating oxidative stress, and can trigger myocyte death, resulting in heart failure. Tyrosol is an antioxidant abounded in diets and medicine. Our objective was to investigate the protective effect of tyrosol on I/R-caused mortality in H9c2 cardiomyocytes through its influence on ROS, Hsp70, ERK, JNK, Bcl-2, Bax and caspase-8. A simulated I/R model was used, myocytes loss was examined by MTT, and ROS levels were measured using DCFH-DA. Nuclear condensation and caspase-3 activity were assessed by DAPI staining and fluorometric assay. Phosphorylated ERK and JNK were determined by electrochemiluminescent ELISA, and Hsp70, Bcl-2, Bax and caspase-8 were examined by Western blotting. Results show that tyrosol salvaged myocyte loss, inhibited nuclear condensation and caspase-3 activity dose-dependently, indicating its protection against I/R-caused myocyte loss. Furthermore, tyrosol significantly inhibited ROS accumulation and activation of ERK and JNK, augmenting Hsp70 expression. Besides, tyrosol inhibited I/R-induced apoptosis, associated with retained anti-apoptotic Bcl-2 protein, and attenuated pro-apoptotic Bax protein, resulting in a preservation of Bcl-2/Bax ratio. Finally, tyrosol notably decreased cleaved caspase-8 levels. In conclusion, cytoprotection of tyrosol in I/R-caused myocyte mortality was involved with the mitigation of ROS, prohibition of the activation of ERK, JNK and caspase-8, and elevation of Hsp70 and Bcl-2/Bax ratio.
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Al-Khalili L, de Castro Barbosa T, Östling J, Massart J, Katayama M, Nyström AC, Oscarsson J, Zierath JR. Profiling of human myotubes reveals an intrinsic proteomic signature associated with type 2 diabetes. TRANSLATIONAL PROTEOMICS 2014. [DOI: 10.1016/j.trprot.2013.12.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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13
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Rani N, Bharti S, Manchanda M, Nag TC, Ray R, Chauhan SS, Kumari S, Arya DS. Regulation of heat shock proteins 27 and 70, p-Akt/p-eNOS and MAPKs by Naringin Dampens myocardial injury and dysfunction in vivo after ischemia/reperfusion. PLoS One 2013; 8:e82577. [PMID: 24324809 PMCID: PMC3855773 DOI: 10.1371/journal.pone.0082577] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 10/24/2013] [Indexed: 11/18/2022] Open
Abstract
Naringin has antioxidant properties that could improve redox-sensitive myocardial ischemia reperfusion (IR) injury. This study was designed to investigate whether naringin restores the myocardial damage and dysfunction in vivo after IR and the mechanisms underlying its cardioprotective effects. Naringin (20–80 mg/kg/day, p.o.) or saline were administered to rats for 14 days and the myocardial IR injury was induced on 15th day by occluding the left anterior descending coronary artery for 45 min and subsequent reperfusion for 60 min. Post-IR rats exhibited pronounced cardiac dysfunction as evidenced by significantly decreased mean arterial pressure, heart rate, +LVdP/dtmax (inotropic state), -LVdP/dtmax (lusitropic state) and increased left ventricular end diastolic pressure as compared to sham group, which was improved by naringin. Further, on histopathological and ultrastructural assessments myocardium and myocytes appeared more normal in structure and the infarct size was reduced significantly in naringin 40 and 80 mg/kg/day group. This amelioration of post-IR-associated cardiac injury by naringin was accompanied by increased nitric oxide (NO) bioavailability, decreased NO inactivation to nitrotyrosine, amplified protein expressions of Hsp27, Hsp70, β-catenin and increased p-eNOS/eNOS, p-Akt/Akt, and p-ERK/ERK ratio. In addition, IR-induced TNF-α/IKK-β/NF-κB upregulation and JNK phosphorylation were significantly attenuated by naringin. Moreover, western blotting and immunohistochemistry analysis of apoptotic signaling pathway further established naringin cardioprotective potential as it upregulated Bcl-2 expression and downregulated Bax and Caspase-3 expression with reduced TUNEL positivity. Naringin also normalized the cardiac injury markers (lactate dehydrogenase and creatine kinase-MB), endogenous antioxidant activities (superoxide dismutase, reduced glutathione and glutathione peroxidase) and lipid peroxidation levels. Thus, naringin restored IR injury by preserving myocardial structural integrity and regulating Hsp27, Hsp70, p-eNOS/p-Akt/p-ERK signaling and inflammatory response.
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Affiliation(s)
- Neha Rani
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India
| | - Saurabh Bharti
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India
| | - Mansi Manchanda
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
| | - T. C. Nag
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Ruma Ray
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - S. S. Chauhan
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
| | - Santosh Kumari
- Department of Plant Physiology, Indian Agricultural Research Institute, Pusa, New Delhi, India
| | - Dharamvir Singh Arya
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India
- * E-mail:
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14
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Vijayakumar A, Buffin NJ, Gallagher EJ, Blank J, Wu Y, Yakar S, LeRoith D. Deletion of growth hormone receptors in postnatal skeletal muscle of male mice does not alter muscle mass and response to pathological injury. Endocrinology 2013; 154:3776-83. [PMID: 23861377 PMCID: PMC5398538 DOI: 10.1210/en.2013-1209] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this study, we investigated whether loss of GH receptor (GHR) signaling in postnatal skeletal muscle alters muscle mass and regenerative ability in adult mice and whether this was dependent on IGF-1 receptor (IGF-1R) signaling. To do so, we used mouse models with skeletal muscle-specific loss of GHR signaling (mGHRKO), IGF-1R and insulin receptor signaling (MKR), or both GHR and IGF-1R/insulin receptor signaling (mGHRKO/MKR). We did not find a reduction in muscle cross-sectional area, fiber type composition, or response to pathological muscle injury in male mGHRKO and mGHRKO/MKR mice when compared with control and MKR mice, respectively. This could potentially be explained by unchanged skeletal muscle Igf-1 expression in mGHRKO and mGHRKO/MKR mice relative to control and MKR mice, respectively. Furthermore, MKR and mGHRKO/MKR mice, but not mGHRKO mice, demonstrated reduced fiber fusion after cardiotoxin injection, suggesting that IGF-1, and not GH, promotes fiber fusion in adult mice. In summary, our data suggest that GHR signaling in postnatal skeletal muscle does not play a significant role in regulating muscle mass or muscle regeneration. Additionally, in our model, muscle Igf-1 expression is not dependent on GHR signaling in postnatal skeletal muscle.
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MESH Headings
- Animals
- Cardiotoxins/toxicity
- Diabetes Mellitus/drug therapy
- Diabetes Mellitus/metabolism
- Growth Hormone/metabolism
- Humans
- Insulin/metabolism
- Insulin/therapeutic use
- Insulin Resistance
- Insulin-Like Growth Factor I/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Muscle Development
- Muscle, Skeletal/cytology
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiology
- Receptor, IGF Type 1/biosynthesis
- Receptor, IGF Type 1/genetics
- Receptor, IGF Type 1/metabolism
- Receptor, Insulin/genetics
- Receptor, Insulin/metabolism
- Receptors, Somatotropin/genetics
- Receptors, Somatotropin/metabolism
- Regeneration
- Signal Transduction/drug effects
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Affiliation(s)
- Archana Vijayakumar
- MD, PhD, Division of Endocrinology, Metabolism, and Bone Diseases, Department of Medicine, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1055, New York, New York 10029.
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15
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Dong H, Li J, Lv Y, Zhou Y, Wang G, Hu S, He X, Yang P, Zhou Z, Xiang X, Wang CY. Comparative analysis of the alveolar macrophage proteome in ALI/ARDS patients between the exudative phase and recovery phase. BMC Immunol 2013; 14:25. [PMID: 23773529 PMCID: PMC3727986 DOI: 10.1186/1471-2172-14-25] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 06/11/2013] [Indexed: 11/21/2022] Open
Abstract
Background Despite decades of extensive studies, the morbidity and mortality for acute lung injury/acute respiratory distress syndrome (ALI/ARDS) remained high. Particularly, biomarkers essential for its early diagnosis and prognosis are lacking. Methods Recent studies suggest that alveolar macrophages (AMs) at the exudative phase of ALI/ARDS initiate, amplify and perpetuate inflammatory responses, while they resolve inflammation in the recovery phase to prevent further tissue injury and perpetuated inflammation in the lung. Therefore, proteins relevant to this functional switch could be valuable biomarkers for ALI/ARDS diagnosis and prognosis. We thus conducted comparative analysis of the AM proteome to assess its dynamic proteomic changes during ALI/ARDS progression and recovery. Results 135 proteins were characterized to be differentially expressed between AMs at the exudative and recovery phase. MALDI-TOF-MS and peptide mass fingerprint (PMF) analysis characterized 27 informative proteins, in which 17 proteins were found with a marked increase at the recovery phase, while the rest of 10 proteins were manifested by the significantly higher levels of expression at the exudative phase. Conclusions Given the role of above identified proteins played in the regulation of inflammatory responses, cell skeleton organization, oxidative stress, apoptosis and metabolism, they have the potential to serve as biomarkers for early diagnosis and prognosis in the setting of patients with ALI/ARDS.
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Affiliation(s)
- Haiyun Dong
- Intensive Care Unit, Diabetes Center, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
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16
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Cardioprotective molecules are enriched in beating cardiomyocytes derived from human embryonic stem cells. Int J Cardiol 2013; 165:341-54. [DOI: 10.1016/j.ijcard.2012.07.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 07/16/2012] [Accepted: 07/21/2012] [Indexed: 01/11/2023]
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17
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Kumar SD, Vijaya M, Samy RP, Dheen ST, Ren M, Watt F, Kang YJ, Bay BH, Tay SSW. Zinc supplementation prevents cardiomyocyte apoptosis and congenital heart defects in embryos of diabetic mice. Free Radic Biol Med 2012; 53:1595-606. [PMID: 22819979 DOI: 10.1016/j.freeradbiomed.2012.07.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 07/02/2012] [Accepted: 07/08/2012] [Indexed: 12/14/2022]
Abstract
Oxidative stress induced by maternal diabetes plays an important role in the development of cardiac malformations. Zinc (Zn) supplementation of animals and humans has been shown to ameliorate oxidative stress induced by diabetic cardiomyopathy. However, the role of Zn in the prevention of oxidative stress induced by diabetic cardiac embryopathy remains unknown. We analyzed the preventive role of Zn in diabetic cardiac embryopathy by both in vivo and in vitro studies. In vivo study revealed a significant decrease in lipid peroxidation, superoxide ions, and oxidized glutathione and an increase in reduced glutathione, nitric oxide, and superoxide dismutase in the developing heart at embryonic days (E) 13.5 and 15.5 in the Zn-supplemented diabetic group when compared to the diabetic group. In addition, significantly down-regulated protein and mRNA expression of metallothionein (MT) in the developing heart of embryos from diabetic group was rescued by Zn supplement. Further, the nuclear microscopy results showed that trace elements such as phosphorus, calcium, and Zn levels were significantly increased (P<0.001), whereas the iron level was significantly decreased (P<0.05) in the developing heart of embryos from the Zn-supplemented diabetic group. In vitro study showed a significant increase in cellular apoptosis and the generation of reactive oxygen species (ROS) in H9c2 (rat embryonic cardiomyoblast) cells exposed to high glucose concentrations. Supplementation with Zn significantly decreased apoptosis and reduced the levels of ROS. In summary, oxidative stress induced by maternal diabetes could play a role in the development and progression of cardiac embryopathy, and Zn supplementation could be a potential therapy for diabetic cardiac embryopathy.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Blood Glucose/metabolism
- Blotting, Western
- Cells, Cultured
- Diabetes Complications/etiology
- Diabetes Complications/pathology
- Diabetes Complications/prevention & control
- Diabetes Mellitus, Experimental/physiopathology
- Dietary Supplements
- Embryo, Mammalian/cytology
- Embryo, Mammalian/drug effects
- Embryo, Mammalian/metabolism
- Female
- Glutathione/genetics
- Glutathione/metabolism
- Heart Defects, Congenital/etiology
- Heart Defects, Congenital/pathology
- Heart Defects, Congenital/prevention & control
- Immunoenzyme Techniques
- Lipid Peroxidation/drug effects
- Metallothionein/genetics
- Metallothionein/metabolism
- Mice
- Myocytes, Cardiac/cytology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Nuclear Microscopy
- Oxidative Stress
- RNA, Messenger/genetics
- Rats
- Reactive Oxygen Species/metabolism
- Real-Time Polymerase Chain Reaction
- Reverse Transcriptase Polymerase Chain Reaction
- Superoxide Dismutase/genetics
- Superoxide Dismutase/metabolism
- Zinc/administration & dosage
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Affiliation(s)
- Srinivasan Dinesh Kumar
- Department of Anatomy, National University Health System, National University of Singapore, Singapore 117597.
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18
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De Souza AI, Cardin S, Wait R, Chung YL, Vijayakumar M, Maguy A, Camm AJ, Nattel S. Proteomic and metabolomic analysis of atrial profibrillatory remodelling in congestive heart failure. J Mol Cell Cardiol 2010; 49:851-63. [DOI: 10.1016/j.yjmcc.2010.07.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 07/12/2010] [Accepted: 07/14/2010] [Indexed: 01/03/2023]
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19
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Ma R, Wang X, Lu C, Li C, Cheng Y, Ding G, Liu L, Ding Z. Dexamethasone attenuated bupivacaine-induced neuron injury in vitro through a threonine–serine protein kinase B-dependent mechanism. Neuroscience 2010; 167:329-42. [DOI: 10.1016/j.neuroscience.2009.12.049] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Revised: 12/18/2009] [Accepted: 12/22/2009] [Indexed: 01/24/2023]
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20
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Chronic acetaminophen attenuates age-associated increases in cardiac ROS and apoptosis in the Fischer Brown Norway rat. Basic Res Cardiol 2010; 105:535-44. [DOI: 10.1007/s00395-010-0094-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Revised: 03/11/2010] [Accepted: 03/13/2010] [Indexed: 12/11/2022]
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21
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Shao ZH, Sharp WW, Wojcik KR, Li CQ, Han M, Chang WT, Ramachandran S, Li J, Hamann KJ, Vanden Hoek TL. Therapeutic hypothermia cardioprotection via Akt- and nitric oxide-mediated attenuation of mitochondrial oxidants. Am J Physiol Heart Circ Physiol 2010; 298:H2164-73. [PMID: 20382860 DOI: 10.1152/ajpheart.00994.2009] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Therapeutic hypothermia (TH) is a promising cardioprotective treatment for cardiac arrest and acute myocardial infarction, but its cytoprotective mechanisms remain unknown. In this study, we developed a murine cardiomyocyte model of ischemia-reperfusion injury to better determine the mechanisms of TH cardioprotection. We hypothesized that TH manipulates Akt, a survival kinase that mediates mitochondrial protection by modulating reactive oxygen species (ROS) and nitric oxide (NO) generation. Cardiomyocytes, isolated from 1- to 2-day-old C57BL6/J mice, were exposed to 90 min simulated ischemia and 3 h reperfusion. For TH, cells were cooled to 32 degrees C during the last 20 min of ischemia and the first hour of reperfusion. Cell viability was evaluated by propidium iodide and lactate dehydrogenase release. ROS production was measured by 6-carboxy-2',7'-dichlorodihydrofluorescein diacetate and mitochondrial membrane potential (DeltaPsim) by 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazoly-carbocyanine iodide (JC-1). Phospho (p)-Akt (Thr308), p-Akt (Ser473), and phosphorylated heat shock protein 27 (p-HSP27) (Ser82) were analyzed by Western blot analysis. TH attenuated reperfusion ROS generation, increased NO, maintained DeltaPsim, and decreased cell death [19.3 + or - 3.3% (n = 11) vs. 44.7 + or - 2.7% (n = 10), P < 0.001]. TH also increased p-Akt during ischemia before reperfusion. TH protection and attenuation of ROS were blocked by the inhibition of Akt and NO synthase but not by a cGMP inhibitor. HSP27, a regulator of Akt, also exhibited increased phosphorylation (Ser82) during ischemia with TH. We conclude that TH cardioprotection is mediated by enhanced Akt/HSP27 phosphorylation and enhanced NO generation, resulting in the attenuation of ROS generation and the maintenance of DeltaPsim following ischemia-reperfusion.
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Affiliation(s)
- Zuo-Hui Shao
- Section of Emergency Medicine, Department of Medicine, Emergency Resuscitation Center, University of Chicago, Chicago, IL, USA
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22
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Glutathione peroxidase 1 protects mitochondria against hypoxia/reoxygenation damage in mouse hearts. Pflugers Arch 2010; 460:55-68. [PMID: 20306076 DOI: 10.1007/s00424-010-0811-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 02/16/2010] [Accepted: 02/18/2010] [Indexed: 10/19/2022]
Abstract
Glutathione peroxidase 1 (GPx1) plays an important role in preventing cardiac dysfunction following ischemia-reperfusion injury. However, its role in protecting cardiac mitochondria against reoxygenation-induced reactive oxygen species (ROS) generation in vivo is unclear. We examined the role of GPx1 in protecting cardiac mitochondria against hypoxia-reoxygenation (HR) damage by testing for alterations in cardiac mitochondrial function. We used a two-dimensional gel electrophoresis proteomics analysis to examine the effects of reoxygenation on cardiac protein in wild-type (GPx1(+/+)) and GPx1 knockout (GPx1(-/-)) mouse hearts. We identified 42 protein spots showing differential expression in the two groups. Sixteen of the proteins identified were located in mitochondria and were involved in a number of key metabolic pathways. To verify our proteomics findings functionally, we performed NADH autofluorescence measurements and ATP production assays. The reduced expression of oxidative phosphorylation proteins in GPx1(-/-) mice following HR treatment resulted in loss of the mitochondrial membrane potential and decreased mitochondrial respiration. Mitochondrial ROS production and oxidative mtDNA damage were increased markedly during reoxygenation in GPx1(-/-) hearts. We also found morphological abnormalities in cardiac mitochondria and myocytes in HR-treated GPx1(-/-). This is the first report of the role of GPx1 in protecting cardiac mitochondria against reoxygenation damage in vivo. These findings will help clarify the mechanisms of HR injury and will aid in the development of antioxidant therapies to prevent cardiac mitochondrial dysfunction associated with reoxygenation.
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Matejíková J, Ravingerová T, Pancza D, Čarnická S, Kolář F. Mitochondrial KATP opening confers protection against lethal myocardial injury and ischaemia-induced arrhythmias in the rat heart via PI3K/Akt-dependent and -independent mechanismsThis article is one of a selection of papers published in a special issue on Advances in Cardiovascular Research. Can J Physiol Pharmacol 2009; 87:1055-62. [DOI: 10.1139/y09-100] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Opening of mitochondrial KATP channels (mitoKATP) has been reported to underlie protection against ischaemia–reperfusion injury induced by ischaemic preconditioning (I-PC); however, the molecular mechanisms of its antiarrhythmic effect have not been fully elucidated. We explored the involvement of phosphatidylinositol 3-kinase (PI3K)/Akt in the PC-like effect of mitoKATP opener diazoxide with particular regard to its role in protection against ischaemia-induced arrhythmias. Langendorff-perfused rat hearts were subjected to 30 min LAD occlusion with or without a prior 15 min of perfusion with diazoxide (50 µmol/L) given either alone (D-PC) or in combination with the PI3K/Akt inhibitor wortmannin (100 nmol/L). In an additional protocol, ischaemia was followed by 2 h reperfusion for infarct size (IS) determination (tetrazolium staining). The total number of premature ventricular complexes over the whole period of ischaemia, episodes of ventricular tachycardia and its duration were significantly lower in the D-PC group than in the non-preconditioned controls (158 ± 20, 2 ± 0.6 and 4.6 ± 1.8 s vs. 551 ± 61, 11 ± 2 and 42 ± 8 s, respectively; p < 0.05), concomitant with a 62% reduction in the size of infarction. Wortmannin modified neither arrhythmogenesis nor IS in the non-preconditioned hearts. Bracketing of diazoxide with wortmannin did not reverse the antiarrhythmic protection, whereas the IS-limiting effect was blunted. The results indicate that in contrast with the positive role of PI3K/Akt in protection against lethal myocardial injury, its activity is not involved in suppression of ischaemia-induced arrhythmias conferred by mitoKATP opening in the rat heart.
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Affiliation(s)
- Jana Matejíková
- Institute for Heart Research, Slovak Academy of Sciences, Centre of Excellence for Cardiovascular Research, Bratislava, Slovak Republic
- Institute of Physiology, Academy of Sciences of the Czech Republic and Centre for Cardiovascular Research, Prague, Czech Republic
| | - Táňa Ravingerová
- Institute for Heart Research, Slovak Academy of Sciences, Centre of Excellence for Cardiovascular Research, Bratislava, Slovak Republic
- Institute of Physiology, Academy of Sciences of the Czech Republic and Centre for Cardiovascular Research, Prague, Czech Republic
| | - Dezider Pancza
- Institute for Heart Research, Slovak Academy of Sciences, Centre of Excellence for Cardiovascular Research, Bratislava, Slovak Republic
- Institute of Physiology, Academy of Sciences of the Czech Republic and Centre for Cardiovascular Research, Prague, Czech Republic
| | - Slávka Čarnická
- Institute for Heart Research, Slovak Academy of Sciences, Centre of Excellence for Cardiovascular Research, Bratislava, Slovak Republic
- Institute of Physiology, Academy of Sciences of the Czech Republic and Centre for Cardiovascular Research, Prague, Czech Republic
| | - František Kolář
- Institute for Heart Research, Slovak Academy of Sciences, Centre of Excellence for Cardiovascular Research, Bratislava, Slovak Republic
- Institute of Physiology, Academy of Sciences of the Czech Republic and Centre for Cardiovascular Research, Prague, Czech Republic
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Ahmed T, Tripathi AK, Suke SG, Kumar V, Ahmed RS, Das S, Banerjee BD. Role of HSP27 and reduced glutathione in modulating malathion-induced apoptosis of human peripheral blood mononuclear cells: Ameliorating effect of N-acetylcysteine and curcumin. Toxicol In Vitro 2009; 23:1319-25. [DOI: 10.1016/j.tiv.2009.07.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2008] [Revised: 06/25/2009] [Accepted: 07/08/2009] [Indexed: 11/25/2022]
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25
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CARDIAC-SPECIFIC EXPRESSION OF HEAT SHOCK PROTEIN 27 ATTENUATED ENDOTOXIN-INDUCED CARDIAC DYSFUNCTION AND MORTALITY IN MICE THROUGH A PI3K/AKT-DEPENDENT MECHANISM. Shock 2009; 32:108-17. [DOI: 10.1097/shk.0b013e318199165d] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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26
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Abrashev RI, Pashova SB, Stefanova LN, Vassilev SV, Dolashka-Angelova PA, Angelova MB. Heat-shock-induced oxidative stress and antioxidant response in Aspergillus niger 26. Can J Microbiol 2009; 54:977-83. [PMID: 19096452 DOI: 10.1139/w08-091] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To extend the knowledge about the relationship between heat shock and oxidative stress in lower eukaryotes, the filamentous fungus Aspergillus niger 26 was chosen as a model system. Here, the response of A. niger cells to heat shock is reported. The temperature treatment significantly increased the levels of reactive oxygen species, superoxide anions (O2), and hydrogen peroxide and the rate of cyanide-resistant respiration as a marker of oxidative stress. Enhanced reactive oxygen species generation coincided with an increase in the content of oxidative damaged protein and in the accumulation of the storage carbohydrates trehalose and glycogen. Thermal survival of the A. niger cells corresponded to a significant increase in the levels of the antioxidant enzymes superoxide dismutase and catalase for all variants. These observations suggest that heat and oxidative stress have a common cellular effect.
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Affiliation(s)
- Radoslav I Abrashev
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 26 Academician G. Bonchev, 1113 Sofia, Bulgaria
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