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Veres B, Eros K, Antus C, Kalman N, Fonai F, Jakus PB, Boros E, Hegedus Z, Nagy I, Tretter L, Gallyas F, Sumegi B. Cyclophilin D-dependent mitochondrial permeability transition amplifies inflammatory reprogramming in endotoxemia. FEBS Open Bio 2021; 11:684-704. [PMID: 33471430 PMCID: PMC7931201 DOI: 10.1002/2211-5463.13091] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/16/2020] [Accepted: 12/30/2020] [Indexed: 01/05/2023] Open
Abstract
Microorganisms or LPS (lipopolysaccharide), an outer membrane component of Gram-negative bacteria, can induce a systemic inflammatory response that leads to sepsis, multiple organ dysfunction, and mortality. Here, we investigated the role of cyclophilin D (CypD)-dependent mitochondrial permeability transition (mPT) in the immunosuppressive phase of LPS-induced endotoxic shock. The liver plays an important role in immunity and organ dysfunction; therefore, we used liver RNA sequencing (RNA-seq) data, Ingenuity® Pathway Analysis (IPA ® ) to investigate the complex role of mPT formation in inflammatory reprogramming and disease progression. LPS induced significant changes in the expression of 2844 genes, affecting 179 pathways related to mitochondrial dysfunction, defective oxidative phosphorylation, nitric oxide (NO) and reactive oxygen species (ROS) accumulation, nuclear factor, erythroid 2 like 2 (Nrf2), Toll-like receptors (TLRs), and tumor necrosis factor α receptor (TNFR)-mediated processes in wild-type mice. The disruption of CypD reduced LPS-induced alterations in gene expression and pathways involving TNFRs and TLRs, in addition to improving survival and attenuating oxidative liver damage and the related NO- and ROS-producing pathways. CypD deficiency diminished the suppressive effect of LPS on mitochondrial function, nuclear- and mitochondrial-encoded genes, and mitochondrial DNA (mtDNA) quantity, which could be critical in improving survival. Our data propose that CypD-dependent mPT is an amplifier in inflammatory reprogramming and promotes disease progression. The mortality in human sepsis and shock is associated with mitochondrial dysfunction. Prevention of mPT by CypD disruption reduces inflammatory reprogramming, mitochondrial dysfunction, and lethality; therefore, CypD can be a novel drug target in endotoxic shock and related inflammatory diseases.
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Affiliation(s)
- Balazs Veres
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
| | - Krisztian Eros
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
- MTA‐PTE Nuclear‐Mitochondrial Interactions Research GroupPecsHungary
- Szentagothai Janos Research CenterUniversity of PecsHungary
| | - Csenge Antus
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
| | - Nikoletta Kalman
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
| | - Fruzsina Fonai
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
| | - Peter Balazs Jakus
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
| | - Eva Boros
- Institute of BiochemistryBiological Research CentreSzegedHungary
| | - Zoltan Hegedus
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
- Institute of BiophysicsBiological Research CentreSzegedHungary
| | - Istvan Nagy
- Institute of BiochemistryBiological Research CentreSzegedHungary
- SeqOmics Biotechnology LtdMorahalomHungary
| | - Laszlo Tretter
- Department of Medical BiochemistrySemmelweis UniversityBudapestHungary
| | - Ferenc Gallyas
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
- MTA‐PTE Nuclear‐Mitochondrial Interactions Research GroupPecsHungary
- Szentagothai Janos Research CenterUniversity of PecsHungary
| | - Balazs Sumegi
- Department of Biochemistry and Medical ChemistryMedical SchoolUniversity of PecsHungary
- MTA‐PTE Nuclear‐Mitochondrial Interactions Research GroupPecsHungary
- Szentagothai Janos Research CenterUniversity of PecsHungary
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2
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Ordog K, Horvath O, Eros K, Bruszt K, Toth S, Kovacs D, Kalman N, Radnai B, Deres L, Gallyas F, Toth K, Halmosi R. Mitochondrial protective effects of PARP-inhibition in hypertension-induced myocardial remodeling and in stressed cardiomyocytes. Life Sci 2021; 268:118936. [PMID: 33421523 DOI: 10.1016/j.lfs.2020.118936] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/27/2020] [Accepted: 12/12/2020] [Indexed: 12/13/2022]
Abstract
AIMS During oxidative stress mitochondria become the main source of endogenous reactive oxygen species (ROS) production. In the present study, we aimed to clarify the effects of pharmacological PARP-1 inhibition on mitochondrial function and quality control processes. MAIN METHODS L-2286, a quinazoline-derivative PARP inhibitor, protects against cardiovascular remodeling and heart failure by favorable modulation of signaling routes. We examined the effects of PARP-1 inhibition on mitochondrial quality control processes and function in vivo and in vitro. Spontaneously hypertensive rats (SHRs) were treated with L-2286 or placebo. In the in vitro model, 150 μM H2O2 stress was applied on neonatal rat cardiomyocytes (NRCM). KEY FINDINGS PARP-inhibition prevented the development of left ventricular hypertrophy in SHRs. The interfibrillar mitochondrial network were less fragmented, the average mitochondrial size was bigger and showed higher cristae density compared to untreated SHRs. Dynamin related protein 1 (Drp1) translocation and therefore the fission of mitochondria was inhibited by L-2286 treatment. Moreover, L-2286 treatment increased the amount of fusion proteins (Opa1, Mfn2), thus preserving structural stability. PARP-inhibition also preserved the mitochondrial genome integrity. In addition, the mitochondrial biogenesis was also enhanced due to L-2286 treatment, leading to an overall increase in the ATP production and improvement in survival of stressed cells. SIGNIFICANCE Our results suggest that the modulation of mitochondrial dynamics and biogenesis can be a promising therapeutical target in hypertension-induced myocardial remodeling and heart failure.
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MESH Headings
- Animals
- Cells, Cultured
- Citrate (si)-Synthase/metabolism
- DNA, Mitochondrial/genetics
- DNA, Mitochondrial/metabolism
- Electrocardiography
- Glutathione/metabolism
- Hypertension/physiopathology
- Hypertrophy, Left Ventricular/drug therapy
- Hypertrophy, Left Ventricular/etiology
- Male
- Membrane Potential, Mitochondrial/drug effects
- Mitochondria, Heart/drug effects
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/pathology
- Mitochondria, Heart/ultrastructure
- Mitochondrial Proteins/metabolism
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/pathology
- Natriuretic Peptide, Brain/blood
- Piperidines/pharmacology
- Poly(ADP-ribose) Polymerase Inhibitors/pharmacology
- Quinazolines/pharmacology
- Rats, Inbred SHR
- Rats, Wistar
- Rats
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Affiliation(s)
- K Ordog
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary; Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - O Horvath
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary; Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - K Eros
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary; Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, Pecs, Hungary; HAS-UP Nuclear-Mitochondrial Interactions Research Group, Budapest, Hungary
| | - K Bruszt
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary; Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Sz Toth
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary
| | - D Kovacs
- Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, Pecs, Hungary
| | - N Kalman
- Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, Pecs, Hungary
| | - B Radnai
- Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, Pecs, Hungary
| | - L Deres
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary; Szentagothai Research Centre, University of Pecs, Pecs, Hungary; HAS-UP Nuclear-Mitochondrial Interactions Research Group, Budapest, Hungary
| | - F Gallyas
- Szentagothai Research Centre, University of Pecs, Pecs, Hungary; Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, Pecs, Hungary; HAS-UP Nuclear-Mitochondrial Interactions Research Group, Budapest, Hungary
| | - K Toth
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary; Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - R Halmosi
- 1st Department of Medicine, University of Pecs Medical School, Pecs, Hungary; Szentagothai Research Centre, University of Pecs, Pecs, Hungary.
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3
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Horvath O, Ordog K, Bruszt K, Kalman N, Kovacs D, Radnai B, Gallyas F, Toth K, Halmosi R, Deres L. Modulation of Mitochondrial Quality Control Processes by BGP-15 in Oxidative Stress Scenarios: From Cell Culture to Heart Failure. Oxid Med Cell Longev 2021; 2021:6643871. [PMID: 33728024 PMCID: PMC7937466 DOI: 10.1155/2021/6643871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/15/2021] [Accepted: 02/09/2021] [Indexed: 12/13/2022]
Abstract
Heart failure (HF) is a complex chronic clinical disease characterized by among others the damage of the mitochondrial network. The disruption of the mitochondrial quality control and the imbalance in fusion-fission processes lead to a lack of energy supply and, finally, to cell death. BGP-15 (O-[3-piperidino-2-hydroxy-1-propyl]-nicotinic acid amidoxime dihydrochloride) is an insulin sensitizer molecule and has a cytoprotective effect in a wide variety of experimental models. In our recent work, we aimed to clarify the mitochondrial protective effects of BGP-15 in a hypertension-induced heart failure model and "in vitro." Spontaneously hypertensive rats (SHRs) received BGP-15 or placebo for 18 weeks. BGP-15 treatment preserved the normal mitochondrial ultrastructure and enhanced the mitochondrial fusion. Neonatal rat cardiomyocytes (NRCMs) were stressed by hydrogen-peroxide. BGP-15 treatment inhibited the mitochondrial fission processes, promoted mitochondrial fusion, maintained the integrity of the mitochondrial genome, and moreover enhanced the de novo biogenesis of the mitochondria. As a result of these effects, BGP-15 treatment also supports the maintenance of mitochondrial function through the preservation of the mitochondrial structure during hydrogen peroxide-induced oxidative stress as well as in an "in vivo" heart failure model. It offers the possibility, which pharmacological modulation of mitochondrial quality control under oxidative stress could be a novel therapeutic approach in heart failure.
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MESH Headings
- Animals
- Animals, Newborn
- Cell Culture Techniques
- Citrate (si)-Synthase/metabolism
- DNA/metabolism
- DNA Damage
- DNA, Mitochondrial/genetics
- Dynamins/metabolism
- Electron Transport/drug effects
- Energy Metabolism/drug effects
- Genome, Mitochondrial
- Heart Failure/etiology
- Heart Failure/pathology
- Hypertension/complications
- Male
- Membrane Potential, Mitochondrial/drug effects
- Mitochondria, Heart/drug effects
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/ultrastructure
- Mitochondrial Dynamics
- Mitochondrial Proteins/metabolism
- Myocardium/pathology
- Myocardium/ultrastructure
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/ultrastructure
- Natriuretic Peptide, Brain/metabolism
- Organelle Biogenesis
- Oxidative Stress/drug effects
- Oximes/administration & dosage
- Oximes/chemistry
- Oximes/pharmacology
- Oxygen Consumption/drug effects
- Piperidines/administration & dosage
- Piperidines/chemistry
- Piperidines/pharmacology
- Rats, Inbred SHR
- Rats, Inbred WKY
- Rats
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Affiliation(s)
- Orsolya Horvath
- 1st Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
| | - Katalin Ordog
- 1st Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
| | - Kitti Bruszt
- 1st Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
| | - Nikoletta Kalman
- Department of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Dominika Kovacs
- Department of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Balazs Radnai
- Department of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Ferenc Gallyas
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
- Department of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
- HAS-UP Nuclear-Mitochondrial Interactions Research Group, 1245 Budapest, Hungary
| | - Kalman Toth
- 1st Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
| | - Robert Halmosi
- 1st Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
| | - Laszlo Deres
- 1st Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
- Szentágothai Research Centre, University of Pecs, Pecs, Hungary
- HAS-UP Nuclear-Mitochondrial Interactions Research Group, 1245 Budapest, Hungary
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4
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Hocsak E, Szabo V, Kalman N, Antus C, Cseh A, Sumegi K, Eros K, Hegedus Z, Gallyas F, Sumegi B, Racz B. PARP inhibition protects mitochondria and reduces ROS production via PARP-1-ATF4-MKP-1-MAPK retrograde pathway. Free Radic Biol Med 2017; 108:770-784. [PMID: 28457938 DOI: 10.1016/j.freeradbiomed.2017.04.018] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 04/13/2017] [Accepted: 04/16/2017] [Indexed: 12/01/2022]
Abstract
Oxidative stress induces DNA breaks and PARP-1 activation which initiates mitochondrial reactive oxygen species (ROS) production and cell death through pathways not yet identified. Here, we show the mechanism by which PARP-1 influences these processes via PARylation of activating transcription factor-4 (ATF4) responsible for MAP kinase phosphatase-1 (MKP-1) expression and thereby regulates MAP kinases. PARP inhibitor, or silencing, of PARP induced MKP-1 expression by ATF4-dependent way, and inactivated JNK and p38 MAP kinases. Additionally, it induced ATF4 expression and binding to cAMP-response element (CRE) leading to MKP-1 expression and the inactivation of MAP kinases. In contrast, PARP-1 activation induced the PARylation of ATF4 and reduced its binding to CRE sequence in vitro. CHIP-qPCR analysis showed that PARP inhibitor increased the ATF4 occupancy at the initiation site of MKP-1. In oxidative stress, PARP inhibition reduced ROS-induced cell death, suppressed mitochondrial ROS production and protected mitochondrial membrane potential on an ATF4 and MKP-1 dependent way. Basically identical results were obtained in WRL-68, A-549 and T24/83 human cell lines indicating that the aforementioned mechanism can be universal. Here, we provide the first description of PARP-1-ATF4-MKP-1-JNK/p38 MAPK retrograde pathway, which is responsible for the regulation of mitochondrial integrity, ROS production and cell death in oxidative stress, and may represent a new mechanism of PARP in cancer therapy since cancer stem cells development is JNK-dependent.
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Affiliation(s)
- Eniko Hocsak
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary; Nuclear-Mitochondrial Interactions Research Group, Hungarian Academy of Sciences, Budapest, Hungary.
| | - Viktor Szabo
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Nikoletta Kalman
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Csenge Antus
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Anna Cseh
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Katalin Sumegi
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Krisztian Eros
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
| | - Zoltan Hegedus
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary; Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Ferenc Gallyas
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary; Nuclear-Mitochondrial Interactions Research Group, Hungarian Academy of Sciences, Budapest, Hungary; Szentagothai Research Center, Pecs, Hungary
| | - Balazs Sumegi
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary; Nuclear-Mitochondrial Interactions Research Group, Hungarian Academy of Sciences, Budapest, Hungary; Szentagothai Research Center, Pecs, Hungary
| | - Boglarka Racz
- Departments of Biochemistry and Medical Chemistry, University of Pecs, Medical School, Pecs, Hungary
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5
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Fonai F, Priber JK, Jakus PB, Kalman N, Antus C, Pollak E, Karsai G, Tretter L, Sumegi B, Veres B. Lack of cyclophilin D protects against the development of acute lung injury in endotoxemia. Biochim Biophys Acta Mol Basis Dis 2015; 1852:2563-73. [PMID: 26385159 DOI: 10.1016/j.bbadis.2015.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/04/2015] [Accepted: 09/12/2015] [Indexed: 01/19/2023]
Abstract
Sepsis caused by LPS is characterized by an intense systemic inflammatory response affecting the lungs, causing acute lung injury (ALI). Dysfunction of mitochondria and the role of reactive oxygen (ROS) and nitrogen species produced by mitochondria have already been proposed in the pathogenesis of sepsis; however, the exact molecular mechanism is poorly understood. Oxidative stress induces cyclophilin D (CypD)-dependent mitochondrial permeability transition (mPT), leading to organ failure in sepsis. In previous studies mPT was inhibited by cyclosporine A which, beside CypD, inhibits cyclophilin A, B, C and calcineurin, regulating cell death and inflammatory pathways. The immunomodulatory side effects of cyclosporine A make it unfavorable in inflammatory model systems. To avoid these uncertainties in the molecular mechanism, we studied endotoxemia-induced ALI in CypD(-/-) mice providing unambiguous data for the pathological role of CypD-dependent mPT in ALI. Our key finding is that the loss of this essential protein improves survival rate and it can intensely ameliorate endotoxin-induced lung injury through attenuated proinflammatory cytokine release, down-regulation of redox sensitive cellular pathways such as MAPKs, Akt, and NF-κB and reducing the production of ROS. Functional inhibition of NF-κB was confirmed by decreased expression of NF-κB-mediated proinflammatory genes. We demonstrated that impaired mPT due to the lack of CypD reduces the severity of endotoxemia-induced lung injury suggesting that CypD specific inhibitors might have a great therapeutic potential in sepsis-induced organ failure. Our data highlight a previously unknown regulatory function of mitochondria during inflammatory response.
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Affiliation(s)
- Fruzsina Fonai
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary
| | - Janos K Priber
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary
| | - Peter B Jakus
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary
| | - Nikoletta Kalman
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary
| | - Csenge Antus
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary
| | - Edit Pollak
- Department of Comparative Anatomy and Developmental Biology, Faculty of Sciences, University of Pecs, Pecs, Hungary
| | - Gergely Karsai
- Department of Comparative Anatomy and Developmental Biology, Faculty of Sciences, University of Pecs, Pecs, Hungary
| | - Laszlo Tretter
- Department of Medical Biochemistry, Semmelweis University, Budapest, Hungary
| | - Balazs Sumegi
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary; Szentagothai Research Center, University of Pecs, Pecs, Hungary; MTA-PTE Nuclear and Mitochondrial Interactions Research Group, Pecs, Hungary
| | - Balazs Veres
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Pecs, Hungary.
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6
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Jakus PB, Kalman N, Antus C, Radnai B, Tucsek Z, Gallyas F, Sumegi B, Veres B. TRAF6 is functional in inhibition of TLR4-mediated NF-κB activation by resveratrol. J Nutr Biochem 2012; 24:819-23. [PMID: 22925919 DOI: 10.1016/j.jnutbio.2012.04.017] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 04/19/2012] [Accepted: 04/30/2012] [Indexed: 12/30/2022]
Abstract
Resveratrol was suggested to inhibit Toll-like receptor (TLR)4-mediated activation of nuclear factor-κB (NF-κB) and Toll/interleukin-1 receptor domain-containing adaptor inducing interferon-β (TRIF)-(TANK)-binding kinase 1, but the myeloid differentiation primary response gene 88-tumor necrosis factor receptor-associated factor 6 (TRAF6) pathway is not involved in this effect. However, involvement of TRAF6 in this process is still elusive since cross talk between TRIF and TRAF6 has been reported in lipopolysaccharide (LPS)-induced signaling. Using RAW 264.7 macrophages, we determined the effect of resveratrol on LPS-induced TRAF6 expression, ubiquitination as well as activation of mitogen-activated protein (MAP) kinases and Akt in order to elucidate its involvement in TLR4 signaling. LPS-induced transient elevation in TRAF6 mRNA and protein expressions is suppressed by resveratrol. LPS induces the ubiquitination of TRAF6, which has been reported to be essential for Akt activation and for transforming growth factor-β activated kinase-1-NAP kinase kinase 6 (MKK6)-mediated p38 and c-Jun N-terminal kinase (JNK) activation. We found that resveratrol diminishes the effect of LPS on TRAF6 ubiquitination and activation of JNK and p38 MAP kinases, while it has no effect on the activation of extracellular-signal-regulated kinase (ERK)1/2. The effect of resveratrol on MAP kinase inhibition is significant since TRAF6 activation was reported to induce activation of JNK and p38 MAP kinase while not affecting ERK1/2. Moreover, Akt was identified previously as a direct target of TRAF6, and we found that, similarly to MAPKs, phosphorylation pattern of Akt followed the activation of TRAF6, and it was inhibited by resveratrol at all time points. Here, we provide the first evidence that resveratrol, by suppressing LPS-induced TRAF6 expression and ubiquitination, attenuates the LPS-induced TLR4-TRAF6, MAP kinase and Akt pathways that can be significant in its anti-inflammatory effects.
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Affiliation(s)
- Peter B Jakus
- Department of Biochemistry and Medical Chemistry, Medical Faculty, University of Pecs, Szigeti Str. 12, Pecs 7624, Hungary
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7
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Racz B, Hanto K, Tapodi A, Solti I, Kalman N, Jakus P, Kovacs K, Debreceni B, Gallyas F, Sumegi B. Regulation of MKP-1 expression and MAPK activation by PARP-1 in oxidative stress: a new mechanism for the cytoplasmic effect of PARP-1 activation. Free Radic Biol Med 2010; 49:1978-88. [PMID: 20920579 DOI: 10.1016/j.freeradbiomed.2010.09.026] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Revised: 09/17/2010] [Accepted: 09/25/2010] [Indexed: 01/30/2023]
Abstract
Previously, it was suggested that the release of nuclearly formed ADP-ribose polymers or ADP-ribosylated proteins could be responsible for the cytosolic and mitochondrial effects of poly(ADP-ribose) polymerase (PARP)-1 activation in oxidative stress. In this report, we provide a novel alternative mechanism. We found that reactive oxygen species-activated PARP-1 regulated the activation of JNK and p38 mitogen-activated protein kinases (MAPKs) because inhibition of PARP-1 by pharmacons, small interfering RNA silencing of PARP-1 expression, or the transdominant expression of enzymatically inactive PARP-1 resulted in the inactivation of these MAPKs. This regulation was achieved by increased expression and enlarged cytoplasmic localization of MAPK phosphatase-1 (MKP-1) upon PARP-1 inhibition in oxidative stress because changes in MKP-1 expression were reflected in the phosphorylation states of JNK and p38. Furthermore, we found that in MKP-1-silenced cells, PARP inhibition was unable to exert its protective effect, indicating the pivotal roles of JNK and p38 in mediating the oxidative-stress-induced cell death as well as that of increased MKP-1 expression in mediating the protective effect of PARP inhibition. We suggest that regulation of a protein that can directly influence cytoplasmic signaling cascades at the expression level represents a novel mechanism for the cytoplasmic action of PARP-1 inhibition.
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Affiliation(s)
- Boglarka Racz
- Department of Biochemistry and Medical Chemistry, University of Pecs, Pecs, Hungary.
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8
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Wachowiak J, Labopin M, Miano M, Chybicka A, Stary J, Sterba J, Masszi T, Labar B, Maschan A, Kowalczyk JR, Lange A, Holowiecki J, Kalman N, Afanassiev BV, Dini G. Haematopoietic stem cell transplantation in children in eastern European countries 1985–2004: development, recent activity and role of the EBMT/ESH Outreach Programme. Bone Marrow Transplant 2008; 41 Suppl 2:S112-7. [DOI: 10.1038/bmt.2008.68] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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