51
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Song C, Zhang J, Qi S, Liu Z, Zhang X, Zheng Y, Andersen J, Zhang W, Strong R, Martinez PA, Musi N, Nie J, Shi Y. Cardiolipin remodeling by ALCAT1 links mitochondrial dysfunction to Parkinson's diseases. Aging Cell 2019; 18:e12941. [PMID: 30838774 PMCID: PMC6516155 DOI: 10.1111/acel.12941] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 01/21/2019] [Accepted: 02/09/2019] [Indexed: 12/18/2022] Open
Abstract
Cardiolipin (CL) is a mitochondrial signature phospholipid that is required for membrane structure, respiration, dynamics, and mitophagy. Oxidative damage of CL by reactive oxygen species is implicated in the pathogenesis of Parkinson's disease (PD), but the underlying cause remains elusive. This work investigated the role of ALCAT1, an acyltransferase that catalyzes pathological remodeling of CL in various aging-related diseases, in a mouse model of PD induced by 1-methyl-4-phenyl-1,2,4,6-tetrahydropyridine (MPTP). We show that MPTP treatment caused oxidative stress, mtDNA mutations, and mitochondrial dysfunction in the midbrain. In contrast, ablation of the ALCAT1 gene or pharmacological inhibition of ALCAT1 prevented MPTP-induced neurotoxicity, apoptosis, and motor deficits. ALCAT1 deficiency also mitigated mitochondrial dysfunction by modulating DRP1 translocation to the mitochondria. Moreover, pharmacological inhibition of ALCAT1 significantly improved mitophagy by promoting the recruitment of Parkin to dysfunctional mitochondria. Finally, ALCAT1 expression was upregulated by MPTP and by α-synucleinopathy, a key hallmark of PD, whereas ALCAT1 deficiency prevented α-synuclein oligomerization and S-129 phosphorylation, implicating a key role of ALCAT1 in the etiology of mouse models of PD. Together, these findings identify ALCAT1 as a novel drug target for the treatment of PD.
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Affiliation(s)
- Chengjie Song
- Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesNanjing Medical UniversityNanjingChina
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
| | - Jun Zhang
- Perenna Pharmceuticals IncSan AntonioTexas
| | - Shasha Qi
- Department of Pathophysiologythe Second Military Medical UniversityShanghaiChina
| | - Zhen Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesNanjing Medical UniversityNanjingChina
| | - Xiaoyang Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesNanjing Medical UniversityNanjingChina
| | - Yue Zheng
- Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesNanjing Medical UniversityNanjingChina
| | - John‐Paul Andersen
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
| | - Weiping Zhang
- Department of Pathophysiologythe Second Military Medical UniversityShanghaiChina
| | - Randy Strong
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
| | - Paul Anthony Martinez
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
| | - Nicolas Musi
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
| | - Jia Nie
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
| | - Yuguang Shi
- Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesNanjing Medical UniversityNanjingChina
- Barshop Institute for Longevity and Aging Studies, Department of PharmacologyUniversity of Texas Health Science CenterSan AntonioTexas
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Mitochondrial Entry of Cytotoxic Proteases: A New Insight into the Granzyme B Cell Death Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9165214. [PMID: 31249651 PMCID: PMC6556269 DOI: 10.1155/2019/9165214] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 04/08/2019] [Indexed: 02/03/2023]
Abstract
The mitochondria represent an integration and amplification hub for various death pathways including that mediated by granzyme B (GB), a granule enzyme expressed by cytotoxic lymphocytes. GB activates the proapoptotic B cell CLL/lymphoma 2 (Bcl-2) family member BH3-interacting domain death agonist (BID) to switch on the intrinsic mitochondrial death pathway, leading to Bcl-2-associated X protein (Bax)/Bcl-2 homologous antagonist/killer- (Bak-) dependent mitochondrial outer membrane permeabilization (MOMP), the dissipation of mitochondrial transmembrane potential (ΔΨm), and the production of reactive oxygen species (ROS). GB can also induce mitochondrial damage in the absence of BID, Bax, and Bak, critical for MOMP, indicating that GB targets the mitochondria in other ways. Interestingly, granzyme A (GA), GB, and caspase 3 can all directly target the mitochondrial respiratory chain complex I for ROS-dependent cell death. Studies of ROS biogenesis have revealed that GB must enter the mitochondria for ROS production, making the mitochondrial entry of cytotoxic proteases (MECP) an unexpected critical step in the granzyme death pathway. MECP requires an intact ΔΨm and is mediated though Sam50 and Tim22 channels in a mtHSP70-dependent manner. Preventing MECP severely compromises GB cytotoxicity. In this review, we provide a brief overview of the canonical mitochondrial death pathway in order to put into perspective this new insight into the GB action on the mitochondria to trigger ROS-dependent cell death.
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53
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Ismail NI, Othman I, Abas F, H Lajis N, Naidu R. Mechanism of Apoptosis Induced by Curcumin in Colorectal Cancer. Int J Mol Sci 2019; 20:E2454. [PMID: 31108984 PMCID: PMC6566943 DOI: 10.3390/ijms20102454] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/20/2019] [Accepted: 04/26/2019] [Indexed: 02/07/2023] Open
Abstract
Colorectal cancer (CRC) is among the top three cancer with higher incident and mortality rate worldwide. It is estimated that about over than 1.1 million of death and 2.2 million new cases by the year 2030. The current treatment modalities with the usage of chemo drugs such as FOLFOX and FOLFIRI, surgery and radiotherapy, which are usually accompanied with major side effects, are rarely cured along with poor survival rate and at higher recurrence outcome. This trigger the needs of exploring new natural compounds with anti-cancer properties which possess fewer side effects. Curcumin, a common spice used in ancient medicine was found to induce apoptosis by targeting various molecules and signaling pathways involved in CRC. Disruption of the homeostatic balance between cell proliferation and apoptosis could be one of the promoting factors in colorectal cancer progression. In this review, we describe the current knowledge of apoptosis regulation by curcumin in CRC with regard to molecular targets and associated signaling pathways.
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Affiliation(s)
- Nor Isnida Ismail
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway Darul Ehsan, Malaysia.
- UniKL MESTECH, A1-1 Jalan TKS1, Taman Kajang Sentral, 43000 Kajang, Malaysia.
| | - Iekhsan Othman
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway Darul Ehsan, Malaysia.
| | - Faridah Abas
- Laboratory of Natural Products, Faculty of Science, University Putra Malaysia, UPM, 43400 Serdang, Malaysia.
- Department of Food Science, Faculty of Food Science and Technology, University Putra Malaysia, UPM, 434000 Serdang, Malaysia.
| | - Nordin H Lajis
- Laboratory of Natural Products, Faculty of Science, University Putra Malaysia, UPM, 43400 Serdang, Malaysia.
| | - Rakesh Naidu
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway Darul Ehsan, Malaysia.
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Magalhães-Novais S, Bermejo-Millo JC, Loureiro R, Mesquita KA, Domingues MR, Maciel E, Melo T, Baldeiras I, Erickson JR, Holy J, Potes Y, Coto-Montes A, Oliveira PJ, Vega-Naredo I. Cell quality control mechanisms maintain stemness and differentiation potential of P19 embryonic carcinoma cells. Autophagy 2019; 16:313-333. [PMID: 30990357 DOI: 10.1080/15548627.2019.1607694] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Given the relatively long life of stem cells (SCs), efficient mechanisms of quality control to balance cell survival and resistance to external and internal stress are required. Our objective was to test the relevance of cell quality control mechanisms for SCs maintenance, differentiation and resistance to cell death. We compared cell quality control in P19 stem cells (P19SCs) before and after differentiation (P19dCs). Differentiation of P19SCs resulted in alterations in parameters involved in cell survival and protein homeostasis, including the redox system, cardiolipin and lipid profiles, unfolded protein response, ubiquitin-proteasome and lysosomal systems, and signaling pathways controlling cell growth. In addition, P19SCs pluripotency was correlated with stronger antioxidant protection, modulation of apoptosis, and activation of macroautophagy, which all contributed to preserve SCs quality by increasing the threshold for cell death activation. Furthermore, our findings identify critical roles for the PI3K-AKT-MTOR pathway, as well as autophagic flux and apoptosis regulation in the maintenance of P19SCs pluripotency and differentiation potential.Abbreviations: 3-MA: 3-methyladenine; AKT/protein kinase B: thymoma viral proto-oncogene; AKT1: thymoma viral proto-oncogene 1; ATG: AuTophaGy-related; ATF6: activating transcription factor 6; BAX: BCL2-associated X protein; BBC3/PUMA: BCL2 binding component 3; BCL2: B cell leukemia/lymphoma 2; BNIP3L: BCL2/adenovirus E1B interacting protein 3-like; CASP3: caspase 3; CASP8: caspase 8; CASP9: caspase 9; CL: cardiolipin; CTSB: cathepsin B; CTSD: cathepsin D; DDIT3/CHOP: DNA-damage inducible transcript 3; DNM1L/DRP1: dynamin 1-like; DRAM1: DNA-damage regulated autophagy modulator 1; EIF2AK3/PERK: eukaryotic translation initiation factor 2 alpha kinase 3; EIF2S1/eIF2α: eukaryotic translation initiation factor 2, subunit alpha; ERN1/IRE1α: endoplasmic reticulum to nucleus signaling 1; ESCs: embryonic stem cells; KRT8/TROMA-1: cytokeratin 8; LAMP2A: lysosomal-associated membrane protein 2A; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; MTOR: mechanistic target of rapamycin kinase; NANOG: Nanog homeobox; NAO: 10-N-nonyl acridine orange; NFE2L2/NRF2: nuclear factor, erythroid derived 2, like 2; OPA1: OPA1, mitochondrial dynamin like GTPase; P19dCs: P19 differentiated cells; P19SCs: P19 stem cells; POU5F1/OCT4: POU domain, class 5, transcription factor 1; PtdIns3K: phosphatidylinositol 3-kinase; RA: retinoic acid; ROS: reactive oxygen species; RPS6KB1/p70S6K: ribosomal protein S6 kinase, polypeptide 1; SCs: stem cells; SOD: superoxide dismutase; SHC1-1/p66SHC: src homology 2 domain-containing transforming protein C1, 66 kDa isoform; SOX2: SRY (sex determining region Y)-box 2; SQSTM1/p62: sequestosome 1; SPTAN1/αII-spectrin: spectrin alpha, non-erythrocytic 1; TOMM20: translocase of outer mitochondrial membrane 20; TRP53/p53: transformation related protein 53; TUBB3/betaIII-tubulin: tubulin, beta 3 class III; UPR: unfolded protein response; UPS: ubiquitin-proteasome system.
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Affiliation(s)
| | - Juan C Bermejo-Millo
- Department of Morphology and Cell Biology, University of Oviedo, Oviedo, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Rute Loureiro
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Cantanhede, Portugal
| | - Katia A Mesquita
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Cantanhede, Portugal
| | - M Rosário Domingues
- Mass Spectrometry Centre, Department of Chemistry & QOPNA, University of Aveiro, Aveiro, Portugal
| | - Elisabete Maciel
- Mass Spectrometry Centre, Department of Chemistry & QOPNA, University of Aveiro, Aveiro, Portugal.,Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal
| | - Tânia Melo
- Mass Spectrometry Centre, Department of Chemistry & QOPNA, University of Aveiro, Aveiro, Portugal
| | - Inês Baldeiras
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Cantanhede, Portugal.,School of Medicine, University of Coimbra, Coimbra, Portugal
| | - Jenna R Erickson
- Department of Biomedical Sciences, University of Minnesota-Duluth, Duluth, MN, USA
| | - Jon Holy
- Department of Biomedical Sciences, University of Minnesota-Duluth, Duluth, MN, USA
| | - Yaiza Potes
- Department of Morphology and Cell Biology, University of Oviedo, Oviedo, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Ana Coto-Montes
- Department of Morphology and Cell Biology, University of Oviedo, Oviedo, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Paulo J Oliveira
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Cantanhede, Portugal
| | - Ignacio Vega-Naredo
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Cantanhede, Portugal.,Department of Morphology and Cell Biology, University of Oviedo, Oviedo, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
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55
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Qin X, Cheng J, Zhong Y, Mahgoub OK, Akter F, Fan Y, Aldughaim M, Xie Q, Qin L, Gu L, Jian Z, Xiong X, Liu R. Mechanism and Treatment Related to Oxidative Stress in Neonatal Hypoxic-Ischemic Encephalopathy. Front Mol Neurosci 2019; 12:88. [PMID: 31031592 PMCID: PMC6470360 DOI: 10.3389/fnmol.2019.00088] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 03/21/2019] [Indexed: 12/24/2022] Open
Abstract
Hypoxic ischemic encephalopathy (HIE) is a type of neonatal brain injury, which occurs due to lack of supply and oxygen deprivation to the brain. It is associated with a high morbidity and mortality rate. There are several therapeutic strategies that can be used to improve outcomes in patients with HIE. These include cell therapies such as marrow mesenchymal stem cells (MSCs) and umbilical cord blood stem cells (UCBCs), which are being incorporated into the new protocols for the prevention of ischemic brain damage. The focus of this review is to discuss the mechanism of oxidative stress in HIE and summarize the current available treatments for HIE. We hope that a better understanding of the relationship between oxidative stress and HIE will provide new insights on the potential therapy of this devastating condition.
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Affiliation(s)
- Xingping Qin
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China.,Department of Neurosurgery, Harvard Medical School, Boston, MA, United States
| | - Jing Cheng
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yi Zhong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Omer Kamal Mahgoub
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Farhana Akter
- Department of Neurosurgery, Harvard Medical School, Boston, MA, United States.,Department of Neuroscience, University of Cambridge, Cambridge, United Kingdom
| | - Yanqin Fan
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - Mohammed Aldughaim
- Department of Neurosurgery, Harvard Medical School, Boston, MA, United States
| | - Qiurong Xie
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Lingxia Qin
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Lijuan Gu
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - Zhihong Jian
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Xiaoxing Xiong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Renzhong Liu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, China
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56
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The role of cardiolipin concentration and acyl chain composition on mitochondrial inner membrane molecular organization and function. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1039-1052. [PMID: 30951877 DOI: 10.1016/j.bbalip.2019.03.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/19/2019] [Accepted: 03/30/2019] [Indexed: 12/28/2022]
Abstract
Cardiolipin (CL) is a key phospholipid of the mitochondria. A loss of CL content and remodeling of CL's acyl chains is observed in several pathologies. Strong shifts in CL concentration and acyl chain composition would presumably disrupt mitochondrial inner membrane biophysical organization. However, it remains unclear in the literature as to which is the key regulator of mitochondrial membrane biophysical properties. We review the literature to discriminate the effects of CL concentration and acyl chain composition on mitochondrial membrane organization. A widely applicable theme emerges across several pathologies, including cardiovascular diseases, diabetes, Barth syndrome, and neurodegenerative ailments. The loss of CL, often accompanied by increased levels of lyso-CLs, impairs mitochondrial inner membrane organization. Modest remodeling of CL acyl chains is not a major driver of impairments and only in cases of extreme remodeling is there an influence on membrane properties.
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57
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Khayyal MT, Kreuter MH, Kemmler M, Altmann P, Abdel-Naby DH, El-Ghazaly MA. Effect of a chamomile extract in protecting against radiation-induced intestinal mucositis. Phytother Res 2019; 33:728-736. [PMID: 30632234 DOI: 10.1002/ptr.6263] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/02/2018] [Accepted: 11/27/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Mohamed T Khayyal
- Department of Pharmacology, Faculty of Pharmacy, Cairo University, Giza, Egypt
| | | | - Michael Kemmler
- Alpinia Laudanum Institute of Phytopharmaceutical Sciences, Walenstadt, Switzerland
| | - Peter Altmann
- Alpinia Laudanum Institute of Phytopharmaceutical Sciences, Walenstadt, Switzerland
| | - Doaa H Abdel-Naby
- Department of Drug Radiation Research, National Centre for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| | - Mona A El-Ghazaly
- Department of Drug Radiation Research, National Centre for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
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58
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Oyagbemi AA, Omobowale TO, Ola-Davies OE, Asenuga ER, Ajibade TO, Adejumobi OA, Arojojoye OA, Afolabi JM, Ogunpolu BS, Falayi OO, Hassan FO, Ochigbo GO, Saba AB, Adedapo AA, Yakubu MA. Quercetin attenuates hypertension induced by sodium fluoride via reduction in oxidative stress and modulation of HSP 70/ERK/PPARγ signaling pathways. Biofactors 2018; 44:465-479. [PMID: 30171731 DOI: 10.1002/biof.1445] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 06/25/2018] [Indexed: 12/13/2022]
Abstract
Hypertension is one of the silent killers in the world with high mortality and morbidity. The exposure of humans and animals to fluoride and/or fluoride containing compounds is almost inevitable. This study investigated the modulatory effects of quercetin on sodium fluoride (NaF)-induced hypertension and cardiovascular complications. Forty male rats were randomly separated into four groups (n =10). Group A animals served as the control, rats in Group B were exposed to 300 ppm of NaF, Groups C and D animals were exposed to 300 ppm of NaF along with quercetin orally at 50 mg/kg and 100 mg/kg orally by gavage, while NaF was administered in drinking water, respectively, for a week. Administration of NaF caused severe hypertension as indicated with significant increases in the systolic, diastolic, and mean arterial blood pressure, together with prolonged ventricular depolarization (QRS) and the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle (QT) intervals when compared with controls. NaF significantly decreased the activities of antioxidant enzymes, caused increase in markers of oxidative stress and renal damage when compared with controls. Immunohistochemical staining revealed lower expressions of Hsp70, ERK, and PPARγ in the heart, kidney, and aorta of rats-administered NaF relative to the controls. Together, quercetin co-treatment with NaF restored blood pressure, normalized QRS interval, and improved antioxidant defense system. © 2018 BioFactors, 44(5):465-479, 2018.
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Affiliation(s)
- Ademola Adetokunbo Oyagbemi
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Temidayo Olutayo Omobowale
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Olufunke Eunice Ola-Davies
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ebunoluwa Racheal Asenuga
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Benin, Benin, Nigeria
| | - Temitayo Olabisi Ajibade
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Olumuyiwa Abiola Adejumobi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | | | - Jeremiah Moyinoluwa Afolabi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
- Cell Biology & Physiology track, Integrated Biomedical Sciences PhD, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Blessing Seun Ogunpolu
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Olufunke Olubunmi Falayi
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Fasilat Oluwakemi Hassan
- Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Grace Onyeche Ochigbo
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Adebowale Benard Saba
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Adeolu Alex Adedapo
- Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Momoh Audu Yakubu
- Department of Environmental and Interdisciplinary Sciences, College of Science, Engineering and Technology, Vascular Biology Unit, Center for Cardiovascular Diseases, COPHS, Texas Southern University, Houston, TX, USA
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59
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Kanarovskii EY, Yaltychenko OV, Gorinchoy NN. Kinetics of Antioxidant Activity of α-Tocopherol and Some of Its Homologues: Part 1. Review: Theoretical Model. SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY 2018. [DOI: 10.3103/s1068375518050058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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60
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Monti DM, Ferraro G, Petruk G, Maiore L, Pane F, Amoresano A, Cinellu MA, Merlino A. Ferritin nanocages loaded with gold ions induce oxidative stress and apoptosis in MCF-7 human breast cancer cells. Dalton Trans 2018; 46:15354-15362. [PMID: 29072740 DOI: 10.1039/c7dt02370g] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Two anticancer gold(iii) compounds, Au2phen and Auoxo4, were encapsulated within a ferritin nanocage. The gold-compound loaded proteins were characterized by UV-Vis spectroscopy, inductively coupled plasma mass spectrometry and circular dichroism. X-ray crystallography shows that the compounds degrade upon encapsulation and gold(i) ions bind Ft within the cage, close to the side chains of Cys126. The gold-encapsulated nanocarriers are cytotoxic to human cancer cells. Au(i)-loaded Ft, obtained upon the encapsulation of Au2phen within the cage, induces oxidative stress activation, which finally leads to apoptosis in MCF-7 cells.
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Affiliation(s)
- Daria Maria Monti
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126, Napoli, Italy.
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61
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Parousis A, Carter HN, Tran C, Erlich AT, Mesbah Moosavi ZS, Pauly M, Hood DA. Contractile activity attenuates autophagy suppression and reverses mitochondrial defects in skeletal muscle cells. Autophagy 2018; 14:1886-1897. [PMID: 30078345 PMCID: PMC6152519 DOI: 10.1080/15548627.2018.1491488] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 06/05/2018] [Accepted: 06/18/2018] [Indexed: 12/18/2022] Open
Abstract
Macroautophagy/autophagy is a survival mechanism that facilitates protein turnover in post-mitotic cells in a lysosomal-dependent process. Mitophagy is a selective form of autophagy, which arbitrates the selective recognition and targeting of aberrant mitochondria for degradation. Mitochondrial content in cells is the net balance of mitochondrial catabolism via mitophagy, and organelle biogenesis. Although the latter process has been well described, mitophagy in skeletal muscle is less understood, and it is currently unknown how these two opposing mechanisms converge during contractile activity. Here we show that chronic contractile activity (CCA) in muscle cells induced mitochondrial biogenesis and coordinately enhanced the expression of TFEB (transcription factor EB) and PPARGC1A/PGC-1α, master regulators of lysosome and mitochondrial biogenesis, respectively. CCA also enhanced the expression of PINK1 and the lysosomal protease CTSD (cathepsin D). Autophagy blockade with bafilomycin A1 (BafA) reduced mitochondrial state 3 and 4 respiration, increased ROS production and enhanced the accumulation of MAP1LC3B-II/LC3-II and SQSTM1/p62. CCA ameliorated this mitochondrial dysfunction during defective autophagy, increased PPARGC1A, normalized LC3-II levels and reversed mitochondrially-localized SQSTM1 toward control levels. NAC emulated the LC3-II reductions induced by contractile activity, signifying that a decrease in oxidative stress could represent a mechanism of autophagy normalization brought about by CCA. CCA enhances mitochondrial biogenesis and lysosomal activity, and normalizes autophagy flux during autophagy suppression, partly via ROS-dependent mechanisms. Thus, contractile activity represents a potential therapeutic intervention for diseases in which autophagy is inhibited, such as vacuolar myopathies in skeletal muscle, by establishing a healthy equilibrium of anabolic and catabolic pathways. ABBREVIATIONS AMPK: AMP-activated protein kinase; BafA: bafilomycin A1; BNIP3L: BCL2/adenovirus E1B interacting protein 3-like; CCA: chronic contractile activity; COX4I1: cytochrome c oxidase subunit 4I1; DMEM: Dulbecco's modified Eagle's medium; GFP: green fluorescent protein; LSD: lysosomal storage diseases; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; MTORC1: mechanistic target of rapamycin kinase complex 1; NAC: N-acetylcysteine; PPARGC1A: peroxisome proliferative activated receptor, gamma, coactivator 1 alpha; PINK1: PTEN induced putative kinase 1; ROS: reactive oxygen species; SOD2: superoxide dismutase 2, mitochondrial; SQSTM1/p62: sequestosome 1; TFEB: transcription factor EB.
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Affiliation(s)
- Alexa Parousis
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Heather N. Carter
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Claudia Tran
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Avigail T. Erlich
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Zahra S. Mesbah Moosavi
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Marion Pauly
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - David A. Hood
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
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Abhishek K, Das S, Kumar A, Kumar A, Kumar V, Saini S, Mandal A, Verma S, Kumar M, Das P. Leishmania donovani induced Unfolded Protein Response delays host cell apoptosis in PERK dependent manner. PLoS Negl Trop Dis 2018; 12:e0006646. [PMID: 30036391 PMCID: PMC6081962 DOI: 10.1371/journal.pntd.0006646] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 08/02/2018] [Accepted: 06/29/2018] [Indexed: 02/06/2023] Open
Abstract
Background Endoplasmic reticulum (ER) stress generated unfolded stress response (UPR) is a basic survival mechanism which protects cell under unfavourable conditions. Leishmania parasite modulates host macrophages in various ways to ensure its survival. Modulation of PI3K-Akt pathway in delayed apoptotic induction of host; enables parasite to stabilize the infection for further propagation. Methodology Infected RAW macrophages were exposed to campothecin or thagsigargin and phosphorylation status of PERK, Akt, BAD and Cyt-C was determined through western blotting using phospho specific antibody. Expression at transcriptional level for cIAP1 &2, ATF4, CHOP, ATF3, HO-1 and sXBP1 was determined using real time PCR. For inhibition studies, RAW macrophages were pre-treated with PERK inhibitor GSK2606414 before infection. Findings Our studies in RAW macrophages showed that induction of host UPR against L.donovani infection activates Akt mediated pathway which delays apoptotic induction of the host. Moreover, Leishmania infection results in phosphorylation and activation of host PERK enzyme and increased transcription of genes of inhibitor of apoptosis gene family (cIAP) mRNA. In our inhibition studies, we found that inhibition of infection induced PERK phosphorylation under apoptotic inducers reduces the Akt phosphorylation and fails to activate further downstream molecules involved in protection against apoptosis. Also, inhibition of PERK phosphorylation under oxidative exposure leads to increased Nitric Oxide production. Simultaneously, decreased transcription of cIAP mRNA upon PERK phosphorylation fates the host cell towards apoptosis hence decreased infection rate. Conclusion Overall the findings from the study suggests that Leishmania modulated host UPR and PERK phosphorylation delays apoptotic induction in host macrophage, hence supports parasite invasion at early stages of infection. Visceral Leishmaniasis or Kala-azar is one of the severe tropical neglected parasitic diseases caused by Leishmania donovani in Indian subcontinent. Modulation of host in terms of delayed apoptotic induction is one of the aspects which favours disease establishment; however the mechanism is not clearly understood yet. In the present study, we tried to explore the connection between L.donovani infection induced UPR in host with delayed onset of apoptosis. We found that L.donovani infection phosphorylates the PERK and Akt molecule in host along with delayed apoptosis. Simultaneously, the levels of cellular IAP (cIAP1 & 2) genes were also up-regulated in infected macrophages. To assess the involvement of PERK in delayed apoptosis of host, we inhibited the phosphorylation of PERK under the exposure to apoptotic inducers. We found that PERK inhibition decreased the Akt phosphorylation and fails to activate other associated downstream molecules involved in delayed apoptosis of host. Also, a significant reduction in cIAP levels was observed. Under oxidative exposure, inhibition of PERK phosphorylation debilitates infected RAW cell’s ability to maintain redox homeostasis leading to higher nitric oxide production. Altogether, L.donovani infection modulates host apoptosis in a PERK dependent manner and favours infection.
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Affiliation(s)
- Kumar Abhishek
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Sushmita Das
- Department of Microbiology, All India Institute of Medical Sciences, Phulwarisharif, Patna Bihar, India
| | - Ashish Kumar
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Ajay Kumar
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Vinod Kumar
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Savita Saini
- National Institute of Pharmaceutical Education and Research, Export Promotion Industrial Park, Hajipur, Vaishali, Bihar, India
| | - Abhishek Mandal
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Sudha Verma
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Manjay Kumar
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
| | - Pradeep Das
- Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences, Agamkuan, Patna, Bihar, India
- * E-mail:
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63
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Sullivan EM, Pennington ER, Green WD, Beck MA, Brown DA, Shaikh SR. Mechanisms by Which Dietary Fatty Acids Regulate Mitochondrial Structure-Function in Health and Disease. Adv Nutr 2018; 9:247-262. [PMID: 29767698 PMCID: PMC5952932 DOI: 10.1093/advances/nmy007] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/02/2018] [Accepted: 01/30/2018] [Indexed: 02/06/2023] Open
Abstract
Mitochondria are the energy-producing organelles within a cell. Furthermore, mitochondria have a role in maintaining cellular homeostasis and proper calcium concentrations, building critical components of hormones and other signaling molecules, and controlling apoptosis. Structurally, mitochondria are unique because they have 2 membranes that allow for compartmentalization. The composition and molecular organization of these membranes are crucial to the maintenance and function of mitochondria. In this review, we first present a general overview of mitochondrial membrane biochemistry and biophysics followed by the role of different dietary saturated and unsaturated fatty acids in modulating mitochondrial membrane structure-function. We focus extensively on long-chain n-3 (ω-3) polyunsaturated fatty acids and their underlying mechanisms of action. Finally, we discuss implications of understanding molecular mechanisms by which dietary n-3 fatty acids target mitochondrial structure-function in metabolic diseases such as obesity, cardiac-ischemia reperfusion injury, obesity, type 2 diabetes, nonalcoholic fatty liver disease, and select cancers.
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Affiliation(s)
- E Madison Sullivan
- Department of Biochemistry and Molecular Biology and
- East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, NC
| | - Edward Ross Pennington
- Department of Biochemistry and Molecular Biology and
- East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, NC
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
| | - William D Green
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
| | - Melinda A Beck
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
| | - David A Brown
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech Corporate Research Center, Blacksburg, VA
| | - Saame Raza Shaikh
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
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Ceresa CDL, Nasralla D, Jassem W. Normothermic Machine Preservation of the Liver: State of the Art. CURRENT TRANSPLANTATION REPORTS 2018; 5:104-110. [PMID: 29564207 PMCID: PMC5843699 DOI: 10.1007/s40472-018-0186-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Purpose of Review This review aims to introduce the concept of normothermic machine perfusion (NMP) and its role in liver transplantation. By discussing results from recent clinical studies and highlighting the potential opportunities provided by this technology, we aim to provide a greater insight into NMP and the role it can play to enhance liver transplantation. Recent Findings NMP has recently been shown to be both safe and feasible in liver transplantation and has also demonstrated its superiority to traditional cold storage in terms of early biochemical liver function. Through the ability to perform a viability assessment during preservation and extend preservation times, it is likely that an increase in organ utilisation will follow. NMP may facilitate the enhanced preservation with improved outcomes from donors after cardiac death and steatotic livers. Furthermore, it provides the exciting potential for liver-directed therapeutic interventions. Summary Evidence to date suggests that NMP facilitates the enhanced preservation of liver grafts with improved early post-transplant outcomes. The key role for this technology is to increase the number and quality of liver grafts available for transplantation and to reduce waiting list deaths.
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Affiliation(s)
- Carlo D L Ceresa
- 1Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - David Nasralla
- 1Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Wayel Jassem
- 2Institute of Liver Studies, King's College Hospital, London, UK
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Kudryavtseva AV, Krasnov GS, Dmitriev AA, Alekseev BY, Kardymon OL, Sadritdinova AF, Fedorova MS, Pokrovsky AV, Melnikova NV, Kaprin AD, Moskalev AA, Snezhkina AV. Mitochondrial dysfunction and oxidative stress in aging and cancer. Oncotarget 2018; 7:44879-44905. [PMID: 27270647 PMCID: PMC5216692 DOI: 10.18632/oncotarget.9821] [Citation(s) in RCA: 330] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 05/28/2016] [Indexed: 12/16/2022] Open
Abstract
Aging and cancer are the most important issues to research. The population in the world is growing older, and the incidence of cancer increases with age. There is no doubt about the linkage between aging and cancer. However, the molecular mechanisms underlying this association are still unknown. Several lines of evidence suggest that the oxidative stress as a cause and/or consequence of the mitochondrial dysfunction is one of the main drivers of these processes. Increasing ROS levels and products of the oxidative stress, which occur in aging and age-related disorders, were also found in cancer. This review focuses on the similarities between ageing-associated and cancer-associated oxidative stress and mitochondrial dysfunction as their common phenotype.
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Affiliation(s)
- Anna V Kudryavtseva
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,National Medical Research Radiological Center, Ministry of Health of the Russian Federation, Moscow, Russia
| | - George S Krasnov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Alexey A Dmitriev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Boris Y Alekseev
- National Medical Research Radiological Center, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Olga L Kardymon
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Asiya F Sadritdinova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,National Medical Research Radiological Center, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Maria S Fedorova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | | | - Nataliya V Melnikova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Andrey D Kaprin
- National Medical Research Radiological Center, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Alexey A Moskalev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Russia
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Agarwal A, Kasinathan A, Ganesan R, Balasubramanian A, Bhaskaran J, Suresh S, Srinivasan R, Aravind KB, Sivalingam N. Curcumin induces apoptosis and cell cycle arrest via the activation of reactive oxygen species-independent mitochondrial apoptotic pathway in Smad4 and p53 mutated colon adenocarcinoma HT29 cells. Nutr Res 2018; 51:67-81. [PMID: 29673545 DOI: 10.1016/j.nutres.2017.12.011] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 12/31/2017] [Accepted: 12/31/2017] [Indexed: 11/25/2022]
Abstract
Curcumin is a natural dietary polyphenol compound that has various pharmacological activities such as antiproliferative and cancer-preventive activities on tumor cells. Indeed, the role reactive oxygen species (ROS) generated by curcumin on cell death and cell proliferation inhibition in colon cancer is poorly understood. In the present study, we hypothesized that curcumin-induced ROS may promote apoptosis and cell cycle arrest in colon cancer. To test this hypothesis, the apoptosis-inducing potential and cell cycle inhibition effect of ROS induced by curcumin was investigated in Smd4 and p53 mutated HT-29 colon adenocarcinoma cells. We found that curcumin treatment significantly increased the level of ROS in HT-29 cells in a dose- and time-dependent manner. Furthermore, curcumin treatment markedly decreased the cell viability and proliferation potential of HT-29 cells in a dose- and time-dependent manner. Conversely, generation of ROS and inhibitory effect of curcumin on HT-29 cells were abrogated by N-acetylcysteine treatment. In addition, curcumin treatment did not show any cytotoxic effects on HT-29 cells. Furthermore, curcumin-induced ROS generation caused the DNA fragmentation, chromatin condensation, and cell nuclear shrinkage and significantly increased apoptotic cells in a dose- and time-dependent manner in HT-29 cells. However, pretreatment of N-acetylcysteine inhibited the apoptosis-triggering effect of curcumin-induced ROS in HT-29 cells. In addition, curcumin-induced ROS effectively mediated cell cycle inhibition in HT-29 cells. In conclusion, our data provide the first evidence that curcumin induces ROS independent apoptosis and cell cycle arrest in colon cancer cells that carry mutation on Smad4 and p53.
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Affiliation(s)
- Ayushi Agarwal
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Akiladdevi Kasinathan
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Ramamoorthi Ganesan
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Akhila Balasubramanian
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Jahnavi Bhaskaran
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Samyuktha Suresh
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Revanth Srinivasan
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - K B Aravind
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India
| | - Nageswaran Sivalingam
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur-603203, Tamilnadu, India.
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Barichello T, Simões LR, Collodel A, Giridharan VV, Dal-Pizzol F, Macedo D, Quevedo J. The translocator protein (18 kDa) and its role in neuropsychiatric disorders. Neurosci Biobehav Rev 2017; 83:183-199. [DOI: 10.1016/j.neubiorev.2017.10.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 09/20/2017] [Accepted: 10/10/2017] [Indexed: 02/08/2023]
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Yuan F, Hedayat AF, Ferguson CM, Lerman A, Lerman LO, Eirin A. Mitoprotection attenuates myocardial vascular impairment in porcine metabolic syndrome. Am J Physiol Heart Circ Physiol 2017; 314:H669-H680. [PMID: 29196345 DOI: 10.1152/ajpheart.00431.2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Metabolic syndrome (MetS) leads to cardiac vascular injury, which may reflect in increased retention of endothelial progenitor cells (EPCs). Coronary endothelial cell (EC) mitochondria partly regulate vascular function and structure. We hypothesized that chronic mitoprotection would preserve EC mitochondria and attenuate coronary vascular injury and dysfunction in swine MetS. Pigs were studied after 16 wk of diet-induced MetS, MetS treated for the last 4 wk with the mitochondria-targeted peptide elamipretide (ELAM; 0.1 mg/kg sc once daily), and lean controls ( n = 6 each). Cardiac remodeling and function were assessed in vivo by multidetector-computed tomography (CT), and coronary artery and sinus blood samples were collected. EC mitochondrial density, apoptosis, oxidative stress, endothelial nitric oxide synthase immunoreactivity, myocardial microvascular density (three-dimensional microcomputed tomography), and coronary endothelial function (organ bath) were assessed ex vivo. The number and arteriovenous gradient of CD34+/KDR+ EPCs were calculated by FACS (a negative net gradient indicating EPC retention). MetS and MetS + ELAM pigs developed similar MetS (obesity, hyperlipidemia, insulin resistance, and hypertension). EC mitochondrial density decreased in MetS animals compared with lean animals but normalized in MetS + ELAM animals. ELAM also attenuated EC oxidative stress and apoptosis and improved subendocardial microvascular density. ELAM-induced vasculoprotection was reflected by decreased coronary retention of EPCs. ELAM also partly improved endothelial nitric oxide synthase immunoreactivity, coronary endothelial function, and vessel maturity, whereas myocardial perfusion was unaffected. Chronic mitoprotection improved coronary EC mitochondrial density and decreased vascular remodeling and dysfunction. However, additional mitochondria-independent mechanisms likely contribute to MetS-induced cardiac vascular injury. NEW & NOTEWORTHY The present study shows that chronic mitoprotection preserved coronary endothelial cell mitochondria and decreased vascular injury, subendocardial microvascular loss, coronary retention of endothelial progenitor cells, and release of markers of vascular injury. However, myocardial perfusion remained blunted, suggesting that additional mitochondria-independent mechanisms likely contribute to metabolic syndrome-induced cardiac vascular injury.
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Affiliation(s)
- Fang Yuan
- Division of Nephrology and Hypertension, Mayo Clinic , Rochester, Minnesota.,Department of Cardiology, People's Hospital of Zhengzhou University, Henan Provincial People's Hospital , Henan , People's Republic of China
| | - Ahmad F Hedayat
- Division of Nephrology and Hypertension, Mayo Clinic , Rochester, Minnesota
| | | | - Amir Lerman
- Department of Cardiovascular Diseases, Mayo Clinic , Rochester, Minnesota
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic , Rochester, Minnesota.,Department of Cardiovascular Diseases, Mayo Clinic , Rochester, Minnesota
| | - Alfonso Eirin
- Division of Nephrology and Hypertension, Mayo Clinic , Rochester, Minnesota
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Cold storage or normothermic perfusion for liver transplantation: probable application and indications. Curr Opin Organ Transplant 2017; 22:300-305. [PMID: 28301388 DOI: 10.1097/mot.0000000000000410] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
PURPOSE OF REVIEW Preservation of the liver via normothermic machine perfusion (NMP) is rapidly becoming an area of great academic and clinical interest. This review focuses on the benefits and limitations of NMP and where the role for static cold storage may lie. RECENT FINDINGS Clinical studies have recently been published reporting the use of NMP in liver preservation for transplantation. They have described the technology to be well tolerated and feasible with potentially improved posttransplant outcomes. NMP facilitates extended preservation times as well as the potential to increase organ utilization through viability assessment and regeneration. However, this technology is considerably more costly than cold storage and carries significant logistical challenges. Cold storage remains the gold standard preservation for standard criteria livers with good long-term patient and graft survival. SUMMARY NMP is an exciting new technological advancement in liver preservation, which is likely to have a positive impact in liver transplantation. However, randomized controlled trials are required to justify its inclusion into standard practice and provide evidence to support its efficacy.
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70
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Paradies G, Paradies V, Ruggiero FM, Petrosillo G. Mitochondrial bioenergetics decay in aging: beneficial effect of melatonin. Cell Mol Life Sci 2017; 74:3897-3911. [PMID: 28785806 PMCID: PMC11107727 DOI: 10.1007/s00018-017-2619-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 08/03/2017] [Indexed: 12/18/2022]
Abstract
Aging is a biological process characterized by progressive decline in physiological functions, increased oxidative stress, reduced capacity to respond to stresses, and increased risk of contracting age-associated disorders. Mitochondria are referred to as the powerhouse of the cell through their role in the oxidative phosphorylation to generate ATP. These organelles contribute to the aging process, mainly through impairment of electron transport chain activity, opening of the mitochondrial permeability transition pore and increased oxidative stress. These events lead to damage to proteins, lipids and mitochondrial DNA. Cardiolipin, a phospholipid of the inner mitochondrial membrane, plays a pivotal role in several mitochondrial bioenergetic processes as well as in mitochondrial-dependent steps of apoptosis and in mitochondrial membrane stability and dynamics. Cardiolipin alterations are associated with mitochondrial bienergetics decline in multiple tissues in a variety of physiopathological conditions, as well as in the aging process. Melatonin, the major product of the pineal gland, is considered an effective protector of mitochondrial bioenergetic function. Melatonin preserves mitochondrial function by preventing cardiolipin oxidation and this may explain, at least in part, the protective role of this compound in mitochondrial physiopathology and aging. Here, mechanisms through which melatonin exerts its protective role against mitochondrial dysfunction associated with aging and age-associated disorders are discussed.
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Affiliation(s)
- Giuseppe Paradies
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.
| | - Valeria Paradies
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Francesca M Ruggiero
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Giuseppe Petrosillo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Bari, Italy
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71
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Min K, Lawan A, Bennett AM. Loss of MKP-5 promotes myofiber survival by activating STAT3/Bcl-2 signaling during regenerative myogenesis. Skelet Muscle 2017; 7:21. [PMID: 29047406 PMCID: PMC5648478 DOI: 10.1186/s13395-017-0137-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 09/25/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The mitogen-activated protein kinases (MAPKs) have been shown to be involved in regulating myofiber survival. In skeletal muscle, p38 MAPK and JNK are negatively regulated by MAPK phosphatase-5 (MKP-5). During muscle regeneration, MKP-5 is downregulated, thereby promoting p38 MAPK/JNK signaling, and subsequent repair of damaged muscle. Mice lacking MKP-5 expression exhibit enhanced regenerative myogenesis. However, the effect of MKP-5 on myofiber survival during regeneration is unclear. METHODS To investigate whether MKP-5 is involved in myofiber survival, skeletal muscle injury was induced by cardiotoxin injection, and the effects on apoptosis were assessed by TUNEL assay in wild type and MKP-5-deficient mice. The contribution of MKP-5 to apoptotic signaling and its link to this pathway through mitochondrial function were determined in regenerating skeletal muscle of MKP-5-deficient mice. RESULTS We found that loss of MKP-5 in skeletal muscle resulted in improved myofiber survival. In response to skeletal muscle injury, loss of MKP-5 decreased activation of the mitochondrial apoptotic pathway involving the signal transducer and activator of transcription 3 (STAT3) and increased expression of the anti-apoptotic transcription factor Bcl-2. Skeletal muscle of MKP-5-deficient mice also exhibited an improved anti-oxidant capacity as a result of increased expression of catalase further contributing to myofiber survival by attenuating oxidative damage. CONCLUSIONS Taken together, these findings suggest that MKP-5 coordinates skeletal muscle regeneration by regulating mitochondria-mediated apoptosis. MKP-5 negatively regulates apoptotic signaling, and during regeneration, MKP-5 downregulation contributes to the restoration of myofiber survival. Finally, these results suggest that MKP-5 inhibition may serve as an important therapeutic target for the preservation of skeletal muscle survival in degenerative muscle diseases.
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Affiliation(s)
- Kisuk Min
- Department of Pharmacology, Yale University, New Haven, CT, 06520, USA
| | - Ahmed Lawan
- Department of Pharmacology, Yale University, New Haven, CT, 06520, USA
| | - Anton M Bennett
- Department of Pharmacology, Yale University, New Haven, CT, 06520, USA. .,Program in Integrative Cell Signaling and Neurobiology of Metabolism, Yale University, New Haven, CT, 06520, USA.
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Oxidative stress and endoplasmic reticulum (ER) stress in the development of neonatal hypoxic-ischaemic brain injury. Biochem Soc Trans 2017; 45:1067-1076. [PMID: 28939695 PMCID: PMC5652227 DOI: 10.1042/bst20170017] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 02/06/2023]
Abstract
Birth asphyxia in term neonates affects 1–2/1000 live births and results in the development of hypoxic–ischaemic encephalopathy with devastating life-long consequences. The majority of neuronal cell death occurs with a delay, providing the potential of a treatment window within which to act. Currently, treatment options are limited to therapeutic hypothermia which is not universally successful. To identify new interventions, we need to understand the molecular mechanisms underlying the injury. Here, we provide an overview of the contribution of both oxidative stress and endoplasmic reticulum stress in the development of neonatal brain injury and identify current preclinical therapeutic strategies.
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73
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Sheeran FL, Pepe S. Mitochondrial Bioenergetics and Dysfunction in Failing Heart. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 982:65-80. [PMID: 28551782 DOI: 10.1007/978-3-319-55330-6_4] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Energy insufficiency has been recognized as a key feature of systolic heart failure. Although mitochondria have long been known to sustain myocardial work energy supply, the capacity to therapeutically target mitochondrial bioenergetics dysfunction is hampered by a complex interplay of multiple perturbations that progressively compound causing myocardial failure and collapse. Compared to non-failing human donor hearts, activity rates of complexes I and IV, nicotinamide nucleotide transhydrogenase (NADPH-transhydrogenase, Nnt) and the Krebs cycle enzymes isocitrate dehydrogenase, malate dehydrogenase and aconitase are markedly decreased in end-stage heart failure. Diminished REDOX capacity with lower total glutathione and coenzyme Q10 levels are also a feature of chronic left ventricular failure. Decreased enzyme activities in part relate to abundant and highly specific oxidative, nitrosylative, and hyperacetylation modifications. In this brief review we highlight that energy deficiency in end-stage failing human left ventricle predominantly involves concomitantly impaired activities of key electron transport chain and Krebs cycle enzymes rather than altered expression of respective genes or proteins. Augmented oxidative modification of these enzyme subunit structures, and the formation of highly reactive secondary metabolites, implicates dysfunction due to diminished capacity for management of mitochondrial reactive oxygen species, which contribute further to progressive decreases in bioenergetic capacity and contractile function in human heart failure.
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Affiliation(s)
- Freya L Sheeran
- Heart Research, Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia.,Royal Children's Hospital, Melbourne, Australia
| | - Salvatore Pepe
- Heart Research, Murdoch Children's Research Institute, Melbourne, Australia. .,Department of Paediatrics, University of Melbourne, Melbourne, Australia. .,Royal Children's Hospital, Melbourne, Australia. .,Department of Cardiology, Royal Children's Hospital, 50 Flemington Road, VIC, 3052, Melbourne, Australia.
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74
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Patel M, McElroy PB. Mitochondrial Dysfunction in Parkinson’s Disease. OXIDATIVE STRESS AND REDOX SIGNALLING IN PARKINSON’S DISEASE 2017. [DOI: 10.1039/9781782622888-00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Parkinson’s disease (PD) is one of the most common neurodegenerative disorders where oxidative stress and mitochondrial dysfunction have been implicated as etiological factors. Mitochondria are the major producers of reactive oxygen species (ROS) that can have damaging effects to cellular macromolecules leading to neurodegeneration. The most compelling evidence for the role of mitochondria in the pathogenesis of PD has been derived from toxicant-induced models of parkinsonism. Over the years, epidemiological studies have suggested a link between exposure to environmental toxins such as pesticides and the risk of developing PD. Data from human and experimental studies involving the use of chemical agents like paraquat, diquat, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, rotenone and maneb have provided valuable insight into the underlying mitochondrial mechanisms contributing to PD and associated neurodegeneration. In this review, we have discussed the role of mitochondrial ROS and dysfunction in the pathogenesis of PD with a special focus on environmental agent-induced parkinsonism. We have described the various mitochondrial mechanisms by which such chemicals exert neurotoxicity, highlighting some landmark epidemiological and experimental studies that support the role of mitochondrial ROS and oxidative stress in contributing to these effects. Finally, we have discussed the significance of these studies in understanding the mechanistic underpinnings of PD-related dopaminergic neurodegeneration.
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Affiliation(s)
- Manisha Patel
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
| | - Pallavi Bhuyan McElroy
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
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75
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Wang X, Dong H, Zeng Q, Xia Q, Zhang L, Zhou Z. Reduced Iron-Containing Clay Minerals as Antibacterial Agents. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:7639-7647. [PMID: 28570809 DOI: 10.1021/acs.est.7b00726] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Previous work documented the general antibacterial mechanism of iron containing clays that involved hydroxyl radical (•OH) production from soluble Fe2+, and attack of cell membrane and intracellular proteins. Here we explore the role of clay structural Fe(II) in •OH production at near neutral pH and identify a lipid involved in the antibacterial process. Structural Fe(III) in nontronite NAu-2 was reduced (rNAu-2) and E. coli, a model bacterium, was exposed to rNAu-2 in oxic suspension. The antibacterial activity of rNAu-2 was dependent on pH and Fe(II) concentration, where E. coli were completely killed at pH 6, but survived at pH 7 and 8. In the presence of a •OH scavenger or in anaerobic atmosphere, E. coli survived better, suggesting that cell death may be caused by •OH generated from oxidation of structural Fe(II) in rNAu-2. In-situ imaging revealed damage of a membrane lipid, cardiolipin, in the polar region of E. coli cells, where reactive oxygen species and redox-active labile Fe were enriched. Our results advance the previous antibacterial model by demonstrating that the structural Fe(II) is the primary source of •OH, which damages cardiolipin, triggers the influx of soluble Fe2+ into the cell, and ultimately leads to cell death.
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Affiliation(s)
- Xi Wang
- Geomicrobiology Laboratory, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Beijing 100083, China
| | - Hailiang Dong
- Geomicrobiology Laboratory, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Beijing 100083, China
- Department of Geology and Environmental Earth Science, Miami University , Oxford, Ohio 45056, United States
| | - Qiang Zeng
- Geomicrobiology Laboratory, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Beijing 100083, China
| | - Qingyin Xia
- Geomicrobiology Laboratory, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Beijing 100083, China
| | - Limin Zhang
- Geomicrobiology Laboratory, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Beijing 100083, China
| | - Ziqi Zhou
- Geomicrobiology Laboratory, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Beijing 100083, China
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76
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Jang S, Lewis TS, Powers C, Khuchua Z, Baines CP, Wipf P, Javadov S. Elucidating Mitochondrial Electron Transport Chain Supercomplexes in the Heart During Ischemia-Reperfusion. Antioxid Redox Signal 2017; 27:57-69. [PMID: 27604998 PMCID: PMC5488255 DOI: 10.1089/ars.2016.6635] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
AIMS Mitochondrial supercomplexes (SCs) are the large supramolecular assembly of individual electron transport chain (ETC) complexes that apparently provide highly efficient ATP synthesis and reduce electron leakage and reactive oxygen species (ROS) production. Oxidative stress during cardiac ischemia-reperfusion (IR) can result in degradation of SCs through oxidation of cardiolipin (CL). Also, IR induces calcium overload and enhances reactive oxygen species (mitROS) in mitochondria that result in the opening of the nonselective permeability transition pores (PTP). The opening of the PTP further compromises cellular energetics and increases mitROS ultimately leading to cell death. Here, we examined the role of PTP-induced mitROS in disintegration of SCs during cardiac IR. The relationship between mitochondrial PTP, ROS, and SCs was investigated using Langendorff-perfused rat hearts subjected to global ischemia (25 min) followed by short-time (5 min) or long-time (60 min) reperfusion in the presence or absence of the PTP inhibitor, sanglifehrin A (SfA), and the mitochondrial targeted ROS and electron scavenger, XJB-5-131. Also, the effects of CL deficiency on SC degradation, PTP, and mitROS were investigated in tafazzin knockdown (TazKD) mice. RESULTS Cardiac IR induced PTP opening and mitROS generation, inhibited by SfA. Percent distributions of SCs were significantly affected by IR, and the effects were dependent on the reperfusion time and reversed by SfA and XJB-5-131. TazKD mice demonstrated a 40% lower SC I + III+IV with reduced basal mitochondrial PTP, ROS, and ETC complex activity. Innovation and Conclusion: Sustained reperfusion after cardiac ischemia induces disintegration of mitochondrial SCs, and PTP-induced ROS presumably play a causal role in SC disassembly. Antioxid. Redox Signal. 27, 57-69.
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Affiliation(s)
- Sehwan Jang
- Department of Physiology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico
| | - Taber S. Lewis
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Corey Powers
- The Heart Institute, Cincinnati Children's Medical Center and University of Cincinnati, Cincinnati, Ohio
| | - Zaza Khuchua
- The Heart Institute, Cincinnati Children's Medical Center and University of Cincinnati, Cincinnati, Ohio
| | - Christopher P. Baines
- Department of Biomedical Sciences, University of Missouri-Columbia, Columbia, Missouri
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Sabzali Javadov
- Department of Physiology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico
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77
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Abstract
Reactive oxygen species (ROS) are important signaling molecules that act through the oxidation of nucleic acids, proteins, and lipids. Several hallmarks of cancer, including uncontrolled proliferation, angiogenesis, and genomic instability, are promoted by the increased ROS levels commonly found in tumor cells. To counteract excessive ROS accumulation, oxidative stress, and death, cancer cells tightly regulate ROS levels by enhancing scavenging enzymes, which are dependent on the reducing cofactor nicotinamide adenine dinucleotide phosphate (NADPH). This review focuses on mitochondrial ROS homeostasis with a description of six pathways of NADPH production in mitochondria and a discussion of the possible strategies of pharmacological intervention to selectively eliminate cancer cells by increasing their ROS levels.
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Affiliation(s)
- Francesco Ciccarese
- Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
| | - Vincenzo Ciminale
- Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy.,Veneto Institute of Oncology - IRCCS, Padua, Italy
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78
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Nicolson GL, Ash ME. Membrane Lipid Replacement for chronic illnesses, aging and cancer using oral glycerolphospholipid formulations with fructooligosaccharides to restore phospholipid function in cellular membranes, organelles, cells and tissues. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:1704-1724. [PMID: 28432031 DOI: 10.1016/j.bbamem.2017.04.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/11/2017] [Accepted: 04/13/2017] [Indexed: 12/15/2022]
Abstract
Membrane Lipid Replacement is the use of functional, oral supplements containing mixtures of cell membrane glycerolphospholipids, plus fructooligosaccharides (for protection against oxidative, bile acid and enzymatic damage) and antioxidants, in order to safely replace damaged, oxidized, membrane phospholipids and restore membrane, organelle, cellular and organ function. Defects in cellular and intracellular membranes are characteristic of all chronic medical conditions, including cancer, and normal processes, such as aging. Once the replacement glycerolphospholipids have been ingested, dispersed, complexed and transported, while being protected by fructooligosaccharides and several natural mechanisms, they can be inserted into cell membranes, lipoproteins, lipid globules, lipid droplets, liposomes and other carriers. They are conveyed by the lymphatics and blood circulation to cellular sites where they are endocytosed or incorporated into or transported by cell membranes. Inside cells the glycerolphospholipids can be transferred to various intracellular membranes by lipid globules, liposomes, membrane-membrane contact or by lipid carrier transfer. Eventually they arrive at their membrane destinations due to 'bulk flow' principles, and there they can stimulate the natural removal and replacement of damaged membrane lipids while undergoing further enzymatic alterations. Clinical trials have shown the benefits of Membrane Lipid Replacement in restoring mitochondrial function and reducing fatigue in aged subjects and chronically ill patients. Recently Membrane Lipid Replacement has been used to reduce pain and other symptoms as well as removing hydrophobic chemical contaminants, suggesting that there are additional new uses for this safe, natural medicine supplement. This article is part of a Special Issue entitled: Membrane Lipid Therapy: Drugs Targeting Biomembranes edited by Pablo V. Escribá.
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Affiliation(s)
- Garth L Nicolson
- Department of Molecular Pathology, The Institute for Molecular Medicine, Huntington Beach, California 92649, USA.
| | - Michael E Ash
- Clinical Education, Newton Abbot, Devon, TQ12 4SG, UK
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79
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Granzyme B enters the mitochondria in a Sam50-, Tim22- and mtHsp70-dependent manner to induce apoptosis. Cell Death Differ 2017; 24:747-758. [PMID: 28338658 DOI: 10.1038/cdd.2017.3] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/07/2016] [Accepted: 12/23/2016] [Indexed: 12/22/2022] Open
Abstract
We have found that granzyme B (GB)-induced apoptosis also requires reactive oxygen species resulting from the alteration of mitochondrial complex I. How GB, which does not possess a mitochondrial targeting sequence, enter this organelle is unknown. We show that GB enters the mitochondria independently of the translocase of the outer mitochondrial membrane complex, but requires instead Sam50, the central subunit of the sorting and assembly machinery that integrates outer membrane β-barrel proteins. Moreover, GB breaches the inner membrane through Tim22, the metabolite carrier translocase pore, in a mitochondrial heat-shock protein 70 (mtHsp70)-dependent manner. Granzyme A (GA) and caspase-3 use a similar route to the mitochondria. Finally, preventing GB from entering the mitochondria either by mutating lysine 243 and arginine 244 or depleting Sam50 renders cells more resistant to GB-mediated reactive oxygen species and cell death. Similarly, Sam50 depletion protects cells from GA-, GM- and caspase-3-mediated cell death. Therefore, cytotoxic molecules enter the mitochondria to induce efficiently cell death through a noncanonical Sam50-, Tim22- and mtHsp70-dependent import pathway.
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80
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Kitt JP, Bryce DA, Minteer SD, Harris JM. Raman Spectroscopy Reveals Selective Interactions of Cytochrome c with Cardiolipin That Correlate with Membrane Permeability. J Am Chem Soc 2017; 139:3851-3860. [PMID: 28221789 DOI: 10.1021/jacs.7b00238] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Permeabilization of the outer mitochondrial membrane is an integral step in apoptosis. The resulting release of pro-apoptotic signaling proteins leads to cell destruction through activation of the cysteine-aspartic protease (caspase) cascade. However, the mechanism of outer mitochondrial membrane (OMM) permeabilization remains unclear. It was recently shown that cytochrome c can induce pore formation in cardiolipin-containing phospholipid membranes, leading to large dextran and protein permeability. In this work, the interaction of cytochrome c with cardiolipin-containing phospholipid vesicles, serving as models of the OMM, is investigated to probe cytochrome c-induced permeability. Lipid vesicles having either a 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) or mixed-DPPC/cardiolipin membrane and containing a membrane-impermeable Raman tracer 3-nitrobenzenesulfonate (3-NBS) were optically trapped, translated into a solution containing cytochrome c, and monitored for 3-NBS leakage. Cytochrome-correlated leakage was observed only in cardiolipin-containing vesicles. Structural changes observed in the Raman spectra during permeabilization indicated acyl chain disordering along with decreased intensity of the cardiolipin cis-double-bond stretching modes. When the vesicle-associated cytochrome c Raman spectrum is compared with a spectrum in buffer, heme-resonance bands are absent, indicating loss of Met-80 coordination. To verify selective interactions of cytochrome c with cardiolipin, these experiments were repeated where the DPPC acyl chains were deuterated (D62-DPPC), allowing spectral resolution of the DPPC acyl chain response from that of cardiolipin. Interestingly, D62-DPPC acyl chains were unaffected by cytochrome c accumulation, while cardiolipin showed major changes in acyl chain structure. These results suggest that cytochrome-induced permeabilization proceeds through selective interaction of cytochrome c with cardiolipin, resulting in protein unfolding, where the unfolded form interacts with cardiolipin acyl chains within the bilayer to induce permeability.
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Affiliation(s)
- Jay P Kitt
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - David A Bryce
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Shelley D Minteer
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Joel M Harris
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112, United States
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81
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Zeriouh W, Nani A, Belarbi M, Dumont A, de Rosny C, Aboura I, Ghanemi FZ, Murtaza B, Patoli D, Thomas C, Apetoh L, Rébé C, Delmas D, Khan NA, Ghiringhelli F, Rialland M, Hichami A. Phenolic extract from oleaster (Olea europaea var. Sylvestris) leaves reduces colon cancer growth and induces caspase-dependent apoptosis in colon cancer cells via the mitochondrial apoptotic pathway. PLoS One 2017; 12:e0170823. [PMID: 28212423 PMCID: PMC5315385 DOI: 10.1371/journal.pone.0170823] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Accepted: 01/11/2017] [Indexed: 12/16/2022] Open
Abstract
Dietary polyphenols, derived from natural products, have received a great interest for their chemopreventive properties against cancer. In this study, we investigated the effects of phenolic extract of the oleaster leaves (PEOL) on tumor growth in mouse model and on cell death in colon cancer cell lines. We assessed the effect of oleaster leaf infusion on HCT116 (human colon cancer cell line) xenograft growth in athymic nude mice. We observed that oleaster leaf polyphenol-rich infusion limited HCT116 tumor growth in vivo. Investigations of PEOL on two human CRC cell lines showed that PEOL induced apoptosis in HCT116 and HCT8 cells. We demonstrated an activation of caspase-3, -7 and -9 by PEOL and that pre-treatment with the pan-caspase inhibitor, N-benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone (z-VAD-fmk), prevented PEOL-induced cell death. We observed an involvement of the mitochondrial pathway in PEOL-induced apoptosis evidenced by reactive oxygen species (ROS) production, a decrease of mitochondrial membrane potential, and cytochrome c release. Increase in intracellular Ca2+ concentration induced by PEOL represents the early event involved in mitochondrial dysfunction, ROS-induced endoplasmic reticulum (ER) stress and apoptosis induced by PEOL, as ruthenium red, an inhibitor of mitochondrial calcium uptake inhibited apoptotic effect of PEOL, BAPTA/AM inhibited PEOL-induced ROS generation and finally, N-acetyl-L-cysteine reversed ER stress and apoptotic effect of PEOL. These results demonstrate that polyphenols from oleaster leaves might have a strong potential as chemopreventive agent in colorectal cancer.
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Affiliation(s)
- Wafa Zeriouh
- Laboratory of Natural Products, Aboubekr Belkaid University, Tlemcen, Algeria
| | - Abdelhafid Nani
- Laboratory of Natural Products, Aboubekr Belkaid University, Tlemcen, Algeria.,Department of Natural and Life Sciences, African University Ahmed Draia, Adrar, Algeria.,INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Meriem Belarbi
- Laboratory of Natural Products, Aboubekr Belkaid University, Tlemcen, Algeria
| | - Adélie Dumont
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | | | - Ikram Aboura
- Laboratory of Natural Products, Aboubekr Belkaid University, Tlemcen, Algeria.,INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Fatima Zahra Ghanemi
- Laboratory of Natural Products, Aboubekr Belkaid University, Tlemcen, Algeria.,INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Babar Murtaza
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Danish Patoli
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Charles Thomas
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Lionel Apetoh
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Cédric Rébé
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France.,Centre Georges François Leclerc, Dijon, France
| | - Dominique Delmas
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Naim Akhtar Khan
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - François Ghiringhelli
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France.,Centre Georges François Leclerc, Dijon, France
| | - Mickael Rialland
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
| | - Aziz Hichami
- INSERM U1231, Université de Bourgogne Franche-Comté, Dijon, France
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82
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Vogel T, Brockmann JG, Quaglia A, Morovat A, Jassem W, Heaton ND, Coussios CC, Friend PJ. The 24-hour normothermic machine perfusion of discarded human liver grafts. Liver Transpl 2017; 23:207-220. [PMID: 27809409 DOI: 10.1002/lt.24672] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 10/03/2016] [Indexed: 12/11/2022]
Abstract
Donor organ shortage necessitates use of less than optimal donor allografts for transplantation. The current cold storage preservation technique fails to preserve marginal donor grafts sufficiently. Evidence from large animal experiments suggests superiority of normothermic machine preservation (NMP) of liver allografts. In this study, we analyze discarded human liver grafts that underwent NMP for the extended period of 24 hours. Thirteen human liver grafts which had been discarded for transplantation were entered into this study. Perfusion was performed with an automated device using an oxygenated, sanguineous perfusion solution at normothermia. Automated control was incorporated for temperature-, flow-, and pressure-regulation as well as oxygenation. All livers were perfused for 24 hours; parameters of biochemical and synthetic liver function as well as histological parameters of liver damage were analyzed. Livers were stratified for expected viability according to the donor's medical history, procurement data, and their macroscopic appearance. Normothermic perfusion preservation of human livers for 24 hours was shown to be technically feasible. Human liver grafts, all of which had been discarded for transplantation, showed levels suggesting organ viability with respect to metabolic and synthetic liver function (to varying degrees). There was positive correlation between instantly available perfusion parameters and generally accepted predictors of posttransplant graft survival. In conclusion, NMP is feasible reliably for periods of at least 24 hours, even in highly suboptimal donor organs. Potential benefits include not only viability testing (as suggested in recent clinical implementations), but also removal of the time constraints associated with the utilization of high-risk livers, and recovery of ischemic and other preretrieval injuries (possibly by enabling therapeutic strategies during NMP). Liver Transplantation 23 207-220 2017 AASLD.
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Affiliation(s)
- Thomas Vogel
- Department of General and Visceral Surgery, University Hospital Münster, Münster, Germany
| | - Jens G Brockmann
- King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Alberto Quaglia
- Institute of Liver Studies, King's College London, London, UK
| | - Alireza Morovat
- Department of Clinical Biochemistry, Oxford University Hospitals National Health Service Trust, Oxford, UK
| | - Wayel Jassem
- Institute of Liver Studies, King's College London, London, UK
| | - Nigel D Heaton
- Institute of Liver Studies, King's College London, London, UK
| | | | - Peter J Friend
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
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83
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Félix L, Oliveira M, Videira R, Maciel E, Alves ND, Nunes FM, Alves A, Almeida JM, Domingues MRM, Peixoto FP. Carvedilol exacerbate gentamicin-induced kidney mitochondrial alterations in adult rat. ACTA ACUST UNITED AC 2017; 69:83-92. [DOI: 10.1016/j.etp.2016.11.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/05/2016] [Accepted: 11/21/2016] [Indexed: 10/20/2022]
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84
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Yang M, Wang B, Gao J, Zhang Y, Xu W, Tao L. Spinosad induces programmed cell death involves mitochondrial dysfunction and cytochrome C release in Spodoptera frugiperda Sf9 cells. CHEMOSPHERE 2017; 169:155-161. [PMID: 27870937 DOI: 10.1016/j.chemosphere.2016.11.065] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 10/22/2016] [Accepted: 11/12/2016] [Indexed: 06/06/2023]
Abstract
Spinosad, a reduced-risk insecticide, acts on the nicotinic acetylcholine receptors and the gamma-aminobutyric acid receptor in the nervous system of target insects. However, its mechanism of action in non-neural insect cells is unclear. This study aimed to evaluate mitochondrial functional changes associated with spinosad in Spodoptera frugiperda (Sf9) insect cells. Our results indicate that in Sf9 cells, spinosad induces programmed cell death and mitochondrial dysfunction through enhanced reactive oxygen species production, mitochondrial permeability transition pore (mPTP) opening, and mitochondrial membrane potential collapse, eventually leading to cytochrome C release and apoptosis. The cytochrome C release induced by spinosad treatment was partly inhibited by the mPTP inhibitors cyclosporin A and bongkrekic acid. Subsequently, we found that spinosad downregulated Bcl-2 expression and upregulated p53 and Bax expressions, activated caspase-9 and caspase-3, and triggered PARP cleavage in Sf9 cells. These findings suggested that spinosad-induced programmed cell death was modulated by mitochondrial dysfunction and cytochrome C release.
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Affiliation(s)
- Mingjun Yang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Bo Wang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Jufang Gao
- College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Yang Zhang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Wenping Xu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Liming Tao
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China.
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85
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Zhang Y, Wu J, Xu W, Gao J, Cao H, Yang M, Wang B, Hao Y, Tao L. Cytotoxic effects of Avermectin on human HepG2 cells in vitro bioassays. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 220:1127-1137. [PMID: 27852506 DOI: 10.1016/j.envpol.2016.11.022] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/07/2016] [Accepted: 11/08/2016] [Indexed: 06/06/2023]
Abstract
Avermectin (AVM) has been widely used in agriculture and animal husbandry based on its broad spectrum of effective anthelmintic activity and specificity targets. However, AVM induction of cytotoxicity in human liver is largely unknown. In this study, we investigate the cytotoxic effects of AVM on HepG2 cells in vitro. The results revealed that AVM inhibited the viability of HepG2 cells and enhanced apoptosis. Established assays of cytotoxicity were performed to characterize the mechanism of AVM toxicity on HepG2 cells. Typical apoptosis morphological changes were shown in AVM-treatment cells including chromatin condensation and DNA fragmentation. We demonstrated that AVM-induced apoptosis of HepG2 cells were mediated by generated ROS. Moreover, a decrease in mitochondrial membrane potential (MMP) and up-regulating the Bax/Bcl-2 ratio, resulted in a release of cytochrome-c as well as activation of caspase-9/-3. In conclusion, our experimental results show that AVM has a potential threat to human health which may be induce apoptosis of human hepatocyte cells via caspase-dependent mitochondrial pathways.
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Affiliation(s)
- Yang Zhang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Jigang Wu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Wenping Xu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Jufang Gao
- College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Haijing Cao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Mingjun Yang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Bo Wang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Youwu Hao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Liming Tao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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86
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Kobylińska A, Reiter RJ, Posmyk MM. Melatonin Protects Cultured Tobacco Cells against Lead-Induced Cell Death via Inhibition of Cytochrome c Translocation. FRONTIERS IN PLANT SCIENCE 2017; 8:1560. [PMID: 28959267 PMCID: PMC5603737 DOI: 10.3389/fpls.2017.01560] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 08/28/2017] [Indexed: 05/03/2023]
Abstract
Melatonin was discovered in plants more than two decades ago and, especially in the last decade, it has captured the interests of plant biologists. Beyond its possible participation in photoperiod processes and its role as a direct free radical scavenger as well as an indirect antioxidant, melatonin is also involved in plant defense strategies/reactions. However, the mechanisms that this indoleamine activates to improve plant stress tolerance still require identification and clarification. In the present report, the ability of exogenous melatonin to protect Nicotiana tabacum L. line Bright Yellow 2 (BY-2) suspension cells against the toxic exposure to lead was examined. Studies related to cell proliferation and viability, DNA fragmentation, possible translocation of cytochrome c from mitochondria to cytosol, cell morphology after fluorescence staining and also the in situ accumulation of superoxide radicals measured via the nitro blue tetrazolium reducing test, were conducted. This work establishes a novel finding by correcting the inhibition of release of mitochondrial ctytocrome c in to the cytoplasm with the high accumulation of superoxide radicals. The results show that pretreatment with 200 nm of melatonin protected tobacco cells from DNA damage caused by lead. Melatonin, as an efficacious antioxidant, limited superoxide radical accumulation as well as cytochrome c release thereby, it likely prevents the activation of the cascade of processes leading to cell death. Fluorescence staining with acridine orange and ethidium bromide documented that lead-stressed cells additionally treated with melatonin displayed intact nuclei. The results revealed that melatonin at proper dosage could significantly increase BY-2 cell proliferation and protected them against death. It was proved that melatonin could function as an effective priming agent to promote survival of tobacco cells under harmful lead-induced stress conditions.
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Affiliation(s)
- Agnieszka Kobylińska
- Laboratory of Plant Ecophysiology, Faculty of Biology and Environmental Protection, University of LodzLodz, Poland
| | - Russel J. Reiter
- Department of Cellular and Structural Biology, UT Health Science Center, San AntonioTX, United States
| | - Malgorzata M. Posmyk
- Laboratory of Plant Ecophysiology, Faculty of Biology and Environmental Protection, University of LodzLodz, Poland
- *Correspondence: Malgorzata M. Posmyk,
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87
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Yang Y, Zong M, Xu W, Zhang Y, Wang B, Yang M, Tao L. Natural pyrethrins induces apoptosis in human hepatocyte cells via Bax- and Bcl-2-mediated mitochondrial pathway. Chem Biol Interact 2016; 262:38-45. [PMID: 27939866 DOI: 10.1016/j.cbi.2016.12.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/02/2016] [Accepted: 12/07/2016] [Indexed: 12/31/2022]
Abstract
Natural pyrethrins have been widely used for pest control in organic farming and for residential indoor pest managements. Although the specific mechanisms underlying their activity are incompletely understood, natural pesticides are considered the safest based on their target specificity and rapid degradation in the environment. Here, we used in vitro bioassays to characterize the cytotoxic effects of natural pyrethrins and attempted to delineate the cellular and molecular mechanisms of their cytotoxicity against human hepatocytes. The results demonstrate that natural pyrethrins reduce cell viability and enhance apoptosis in HepG2 cells. In addition, the current data indicate that natural pyrethrins cause a reduction in the mitochondrial membrane potential (Δψm), increase reactive oxygen species production, and up-regulate the Bax/Bcl-2 expression, leading to the release of cytochrome-c into the cytosol, activation of caspase-9 and caspase-3 and cleavage of poly (ADP-ribose) polymerase (PARP). Taken together, the results indicate that natural pyrethrins has potentially exert adverse effects on human health by inducing caspase-dependent apoptosis in hepatocytes through Bax- and Bcl-2-mediated mitochondrial pathway.
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Affiliation(s)
- Yun Yang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Mimi Zong
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Wenping Xu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Yang Zhang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Bo Wang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Mingjun Yang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Liming Tao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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88
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Delhaye J, Salamin N, Roulin A, Criscuolo F, Bize P, Christe P. Interspecific correlation between red blood cell mitochondrial ROS production, cardiolipin content and longevity in birds. AGE (DORDRECHT, NETHERLANDS) 2016; 38:433-443. [PMID: 27572896 PMCID: PMC5266217 DOI: 10.1007/s11357-016-9940-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 07/22/2016] [Indexed: 05/29/2023]
Abstract
Mitochondrial respiration releases reactive oxygen species (ROS) as by-products that can damage the soma and may in turn accelerate ageing. Hence, according to "the oxidative stress theory of ageing", longer-lived organisms may have evolved mechanisms that improve mitochondrial function, reduce ROS production and/or increase cell resistance to oxidative damage. Cardiolipin, an important mitochondrial inner-membrane phospholipid, has these properties by binding and stabilizing mitochondrial inner-membrane proteins. Here, we investigated whether ROS production, cardiolipin content and cell membrane resistance to oxidative attack in freshly collected red blood cells (RBCs) are associated with longevity (range 5-35 years) in 21 bird species belonging to seven Orders. After controlling for phylogeny, body size and oxygen consumption, variation in maximum longevity was significantly explained by mitochondrial ROS production and cardiolipin content, but not by membrane resistance to oxidative attack. RBCs of longer-lived species produced less ROS and contained more cardiolipin than RBCs of shorter-lived species did. These results support the oxidative stress theory of ageing and shed light on mitochondrial cardiolipin as an important factor linking ROS production to longevity.
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Affiliation(s)
- Jessica Delhaye
- Department of Ecology and Evolution, Quartier Sorge, bâtiment Biophore, University of Lausanne, 1015, Lausanne, Switzerland.
| | - Nicolas Salamin
- Department of Ecology and Evolution, Quartier Sorge, bâtiment Biophore, University of Lausanne, 1015, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Quartier Sorge, 1015, Lausanne, Switzerland
| | - Alexandre Roulin
- Department of Ecology and Evolution, Quartier Sorge, bâtiment Biophore, University of Lausanne, 1015, Lausanne, Switzerland
| | | | - Pierre Bize
- Department of Ecology and Evolution, Quartier Sorge, bâtiment Biophore, University of Lausanne, 1015, Lausanne, Switzerland
- Institute of Biological and Environmental Sciences, University of Aberdeen, AB24 2TZ, Aberdeen, UK
| | - Philippe Christe
- Department of Ecology and Evolution, Quartier Sorge, bâtiment Biophore, University of Lausanne, 1015, Lausanne, Switzerland
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89
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Pennington ER, Fix A, Sullivan EM, Brown DA, Kennedy A, Shaikh SR. Distinct membrane properties are differentially influenced by cardiolipin content and acyl chain composition in biomimetic membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1859:257-267. [PMID: 27889304 DOI: 10.1016/j.bbamem.2016.11.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 12/14/2022]
Abstract
Cardiolipin (CL) has a critical role in maintaining mitochondrial inner membrane structure. In several conditions such as heart failure and aging, there is loss of CL content and remodeling of CL acyl chains, which are hypothesized to impair mitochondrial inner membrane biophysical organization. Therefore, this study discriminated how CL content and acyl chain composition influenced select properties of simple and complex mitochondrial mimicking model membranes. We focused on monolayer excess area/molecule (a measure of lipid miscibility), bilayer phase transitions, and microdomain organization. In monolayer compression studies, loss of tetralinoleoyl [(18:2)4] CL content decreased the excess area/molecule. Replacement of (18:2)4CL acyl chains with tetraoleoyl [(18:1)4] CL or tetradocosahexaenoyl [(22:6)4] CL generally had little influence on monolayer excess area/molecule; in contrast, replacement of (18:2)4CL acyl chains with tetramyristoyl [(14:0)4] CL increased monolayer excess area/molecule. In bilayers, calorimetric studies showed that substitution of (18:2)4CL with (18:1)4CL or (22:6)4CL lowered the phase transition temperature of phosphatidylcholine vesicles whereas (14:0)4CL had no effect. Finally, quantitative imaging of giant unilamellar vesicles revealed differential effects of CL content and acyl chain composition on microdomain organization, visualized with the fluorescent probe Texas Red DHPE. Notably, microdomain areas were decreased by differing magnitudes upon lowering of (18:2)4CL content and substitution of (18:2)4CL with (14:0)4CL or (22:6)4CL. Conversely, exchanging (18:2)4CL with (18:1)4CL increased microdomain area. Altogether, these data demonstrate that CL content and fatty acyl composition differentially target membrane physical properties, which has implications for understanding how CL regulates mitochondrial activity and the design of CL-specific therapeutics.
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Affiliation(s)
- Edward Ross Pennington
- Department of Biochemistry & Molecular Biology, USA; East Carolina Diabetes & Obesity Institute, Brody School of Medicine, East Carolina University, 115 Heart Drive, Mail Stop 743, Greenville, NC 27834, USA
| | - Amy Fix
- Department of Biochemistry & Molecular Biology, USA
| | - E Madison Sullivan
- Department of Biochemistry & Molecular Biology, USA; East Carolina Diabetes & Obesity Institute, Brody School of Medicine, East Carolina University, 115 Heart Drive, Mail Stop 743, Greenville, NC 27834, USA
| | - David A Brown
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech Corporate Research Center, 1035 ILSB, 1981 Kraft Drive, Blacksburg, VA 24060, USA
| | - Anthony Kennedy
- Department of Chemistry, East 10th Street, Mail Stop 552, East Carolina University, Greenville, NC 27854, USA
| | - Saame Raza Shaikh
- Department of Biochemistry & Molecular Biology, USA; East Carolina Diabetes & Obesity Institute, Brody School of Medicine, East Carolina University, 115 Heart Drive, Mail Stop 743, Greenville, NC 27834, USA.
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90
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Maddalena LA, Ghelfi M, Atkinson J, Stuart JA. The mitochondria-targeted imidazole substituted oleic acid 'TPP-IOA' affects mitochondrial bioenergetics and its protective efficacy in cells is influenced by cellular dependence on aerobic metabolism. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2016; 1858:73-85. [PMID: 27836699 DOI: 10.1016/j.bbabio.2016.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 10/28/2016] [Accepted: 11/06/2016] [Indexed: 12/19/2022]
Abstract
A variety of mitochondria-targeted small molecules have been invented to manipulate mitochondrial redox activities and improve function in certain disease states. 3-Hydroxypropyl-triphenylphosphonium-conjugated imidazole-substituted oleic acid (TPP-IOA) was developed as a specific inhibitor of cytochrome c peroxidase activity that inhibits apoptosis by preventing cardiolipin oxidation and cytochrome c release to the cytosol. Here we evaluate the effects of TPP-IOA on oxidative phosphorylation in isolated mitochondria and on mitochondrial function in live cells. We demonstrate that, at concentrations similar to those required to achieve inhibition of cytochrome c peroxidase activity, TPP-IOA perturbs oxidative phosphorylation in isolated mitochondria. In live SH-SY5Y cells, TPP-IOA partially collapsed mitochondrial membrane potential, caused extensive fragmentation of the mitochondrial network, and decreased apparent mitochondrial abundance within 3h of exposure. Many cultured cell lines rely primarily on aerobic glycolysis, potentially making them less sensitive to small molecules disrupting oxidative phosphorylation. We therefore determined the anti-apoptotic efficacy of TPP-IOA in SH-SY5Y cells growing in glucose or in galactose, the latter of which increases reliance on oxidative phosphorylation for ATP supply. The anti-apoptotic activity of TPP-IOA that was observed in glucose media was not seen in galactose media. It therefore appears that, at concentrations required to inhibit cytochrome c peroxidase activity, TPP-IOA perturbs oxidative phosphorylation. In light of these data it is predicted that potential future therapeutic applications of TPP-IOA will be restricted to highly glycolytic cell types with limited reliance on oxidative phosphorylation.
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Affiliation(s)
- Lucas A Maddalena
- Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada.
| | - Mikel Ghelfi
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada
| | - Jeffrey Atkinson
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada
| | - Jeffrey A Stuart
- Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada.
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91
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Jang SJ, Yang IJ, Tettey CO, Kim KM, Shin HM. In-vitro anticancer activity of green synthesized silver nanoparticles on MCF-7 human breast cancer cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:430-435. [DOI: 10.1016/j.msec.2016.03.101] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 12/11/2015] [Accepted: 03/29/2016] [Indexed: 12/19/2022]
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92
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Wu CH, Lin YW, Wu TF, Ko JL, Wang PH. Clinical implication of voltage-dependent anion channel 1 in uterine cervical cancer and its action on cervical cancer cells. Oncotarget 2016; 7:4210-25. [PMID: 26716410 PMCID: PMC4826200 DOI: 10.18632/oncotarget.6704] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/29/2015] [Indexed: 11/25/2022] Open
Abstract
Two-dimensional gel electrophoresis and liquid chromatography-tandem mass spectrometry were performed to investigate the influence of human nonmetastatic clone 23 type 1 (nm23-H1), a metastasis-associated gene on proteomic alterations in cancer cells of the uterine cervix. It was validated by RT-PCR and Western blot analysis. The expression of voltage-dependent anion channel 1 (VDAC1) was increased in nm23-H1 gene silenced SiHa or CaSki cervical cancer cells. The clinical implication was shown that cervical cancer tissues with positive VDAC1 immunoreactivity exhibited deep stromal invasion (>10 mm in depth) and large tumor size (> 4 cm in diameter). Cervical cancer patients with positive VDAC1 immunoreactivity displayed higher recurrence and poorer overall survival than those with negative VDAC1. Silencing of VDAC1 reduced cell proliferation and migratory ability. Mitochondrial membrane potential was decreased and reactive oxygen species generation was increased in the VDAC1 gene-silenced cervical cancer cells. Cell cycle progression and autophagy were not changed in VDAC1 silencing cells. The cytotoxicity of cisplatin was significantly enhanced by knockdown of cellular VDAC1 and the compounds that interfere with hexokinase binding to VDAC. Therapeutic strategies may be offered using VDAC1 as a target to reduce cell growth and migration, enhance the synergistic therapeutic efficacy of cisplatin and reduce cisplatin dose-limiting toxicity.
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Affiliation(s)
- Chih-Hsien Wu
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Yu-Wen Lin
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Tzu-Fan Wu
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Jiunn-Liang Ko
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Po-Hui Wang
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan
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93
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Cell Death and Heart Failure in Obesity: Role of Uncoupling Proteins. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:9340654. [PMID: 27642497 PMCID: PMC5011521 DOI: 10.1155/2016/9340654] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 07/26/2016] [Accepted: 07/28/2016] [Indexed: 12/19/2022]
Abstract
Metabolic diseases such as obesity, metabolic syndrome, and type II diabetes are often characterized by increased reactive oxygen species (ROS) generation in mitochondrial respiratory complexes, associated with fat accumulation in cardiomyocytes, skeletal muscle, and hepatocytes. Several rodents studies showed that lipid accumulation in cardiac myocytes produces lipotoxicity that causes apoptosis and leads to heart failure, a dynamic pathological process. Meanwhile, several tissues including cardiac tissue develop an adaptive mechanism against oxidative stress and lipotoxicity by overexpressing uncoupling proteins (UCPs), specific mitochondrial membrane proteins. In heart from rodent and human with obesity, UCP2 and UCP3 may protect cardiomyocytes from death and from a state progressing to heart failure by downregulating programmed cell death. UCP activation may affect cytochrome c and proapoptotic protein release from mitochondria by reducing ROS generation and apoptotic cell death. Therefore the aim of this review is to discuss recent findings regarding the role that UCPs play in cardiomyocyte survival by protecting against ROS generation and maintaining bioenergetic metabolism homeostasis to promote heart protection.
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94
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Li J, Qi W, Chen G, Feng D, Liu J, Ma B, Zhou C, Mu C, Zhang W, Chen Q, Zhu Y. Mitochondrial outer-membrane E3 ligase MUL1 ubiquitinates ULK1 and regulates selenite-induced mitophagy. Autophagy 2016; 11:1216-29. [PMID: 26018823 DOI: 10.1080/15548627.2015.1017180] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Mitochondria serve as membrane sources and signaling platforms for regulating autophagy. Accumulating evidence has also shown that damaged mitochondria are removed through both selective mitophagy and general autophagy in response to mitochondrial and oxidative stresses. Protein ubiquitination through mitochondrial E3 ligases plays an integrative role in mitochondrial outer membrane protein degradation, mitochondrial dynamics, and mitophagy. Here we showed that MUL1, a mitochondria-localized E3 ligase, regulates selenite-induced mitophagy in an ATG5 and ULK1-dependent manner. ULK1 partially translocated to mitochondria after selenite treatment and interacted with MUL1. We also demonstrated that ULK1 is a novel substrate of MUL1. These results suggest the association of mitochondria with autophagy regulation and provide a new mechanism for the beneficial effects of selenium as a chemopreventive agent.
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Affiliation(s)
- Jie Li
- a State Key Laboratory of Medicinal Chemical Biology; College of Life Sciences ; Nankai University ; Tianjin , China
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95
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Kienhöfer D, Boeltz S, Hoffmann MH. Reactive oxygen homeostasis – the balance for preventing autoimmunity. Lupus 2016; 25:943-54. [DOI: 10.1177/0961203316640919] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Being mainly known for their role in the antimicrobial defense and collateral damage they cause in tissues as agents of oxidative stress, reactive oxygen species were considered “the bad guys” for decades. However, in the last years it was shown that the absence of reactive oxygen species can lead to the development of immune-mediated inflammatory diseases. Animal models of lupus, arthritis and psoriasis revealed reactive oxygen species-deficiency as a potent driver of pathogenesis. On the contrary, in chronic stages oxidative stress can still contribute to progression of inflammation. It seems that a neatly adjusted redox balance is necessary to sustain an immune state that both prevents the development of overt autoimmunity and attenuates chronic stages of disease.
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Affiliation(s)
- D Kienhöfer
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Universitätsklinikum Erlangen, Department of Internal Medicine 3—Rheumatology and Immunology, Erlangen, Germany
| | - S Boeltz
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Universitätsklinikum Erlangen, Department of Internal Medicine 3—Rheumatology and Immunology, Erlangen, Germany
| | - M H Hoffmann
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Universitätsklinikum Erlangen, Department of Internal Medicine 3—Rheumatology and Immunology, Erlangen, Germany
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96
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Bradley RM, Stark KD, Duncan RE. Influence of tissue, diet, and enzymatic remodeling on cardiolipin fatty acyl profile. Mol Nutr Food Res 2016; 60:1804-18. [PMID: 27061349 DOI: 10.1002/mnfr.201500966] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 03/21/2016] [Accepted: 03/28/2016] [Indexed: 11/10/2022]
Abstract
Cardiolipin is a specialized phospholipid found primarily in the inner mitochondrial membrane. Because of its unique dimeric structure, cardiolipin plays an important role in mitochondrial function, stability, and membrane fluidity. As such, cardiolipin is subject to a high degree of remodeling by phospholipases, acyltransferases, and transacylases that create a fatty acyl profile that tends to be highly tissue-specific. Despite this overarching regulation, the molecular species of cardiolipin produced are also influenced by dietary lipid composition. A number of studies have characterized the tissue-specific profile of cardiolipin species and have investigated the specific nature of cardiolipin remodeling, including the role of both enzymes and diet. The aim of this review is to highlight tissue specific differences in cardiolipin composition and, collectively, the enzymatic and dietary factors that contribute to these differences. Consequences of aberrant cardiolipin fatty acyl remodeling are also discussed.
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Affiliation(s)
- Ryan M Bradley
- Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
| | - Ken D Stark
- Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
| | - Robin E Duncan
- Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
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97
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Nam DC, Hah YS, Nam JB, Kim RJ, Park HB. Cytoprotective Mechanism of Cyanidin and Delphinidin against Oxidative Stress-Induced Tenofibroblast Death. Biomol Ther (Seoul) 2016; 24:426-32. [PMID: 27098861 PMCID: PMC4930287 DOI: 10.4062/biomolther.2015.169] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 01/06/2016] [Accepted: 01/11/2016] [Indexed: 12/17/2022] Open
Abstract
Age-related rotator cuff tendon degeneration is related to tenofibroblast apoptosis. Anthocyanins reduce oxidative stress-induced apoptotic cell death in tenofibroblasts. The current study investigated the presence of cell protective effects in cyanidin and delphinidin, the most common aglycon forms of anthocyanins. We determined whether these anthocyanidins have antiapoptotic and antinecrotic effects in tenofibroblasts exposed to H2O2, and evaluated their biomolecular mechanisms. Both cyanidin and delphinidin inhibited H2O2-induced apoptosis in a dose-dependent manner. However, at concentrations of 100 μg/ml or greater, delphinidin showed cytotoxicity against tenofibroblasts and a decreased antinecrotic effect. Cyanidin and delphinidin both showed inhibitory effects on the H2O2-induced increase in intracellular ROS formation and the activation of ERK1/2 and JNK. In conclusion, both cyanidin and delphinidin have cytoprotective effects on cultured tenofibroblasts exposed to H2O2. These results suggest that cyanidin and delphinidin are both beneficial for the treatment of oxidative stress-mediated tenofibroblast cell death, but their working concentrations are different.
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Affiliation(s)
- Dae Cheol Nam
- Department of Orthopaedic Surgery, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Republic of Korea
| | - Young Sool Hah
- Biomedical Research Institute, Gyeongsang National University Hospital, Jinju 52727, Republic of Korea
| | - Jung Been Nam
- Department of Environmental Material Science, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Ra Jeong Kim
- Clinical Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Hyung Bin Park
- School of Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea
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98
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Babizhayev MA. Generation of reactive oxygen species in the anterior eye segment. Synergistic codrugs of N-acetylcarnosine lubricant eye drops and mitochondria-targeted antioxidant act as a powerful therapeutic platform for the treatment of cataracts and primary open-angle glaucoma. BBA CLINICAL 2016; 6:49-68. [PMID: 27413694 PMCID: PMC4925929 DOI: 10.1016/j.bbacli.2016.04.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/05/2016] [Accepted: 04/11/2016] [Indexed: 12/13/2022]
Abstract
Senile cataract is a clouding of the lens in the aging eye leading to a decrease in vision. Symptoms may include faded colors, blurry vision, halos around light, trouble with bright lights, and trouble seeing at night. This may result in trouble driving, reading, or recognizing faces. Cataracts are the cause of half of blindness and 33% of visual impairment worldwide. Cataracts result from the deposition of aggregated proteins in the eye lens and lens fiber cells plasma membrane damage which causes clouding of the lens, light scattering, and obstruction of vision. ROS induced damage in the lens cell may consist of oxidation of proteins, DNA damage and/or lipid peroxidation, all of which have been implicated in cataractogenesis. The inner eye pressure (also called intraocular pressure or IOP) rises because the correct amount of fluid can't drain out of the eye. With primary open-angle glaucoma, the entrances to the drainage canals are clear and should be working correctly. The clogging problem occurs further inside the drainage canals, similar to a clogged pipe below the drain in a sink. The excessive oxidative damage is a major factor of the ocular diseases because the mitochondrial respiratory chain in mitochondria of the vital cells is a significant source of the damaging reactive oxygen species superoxide and hydrogen peroxide. However, despite the clinical importance of mitochondrial oxidative damage, antioxidants have been of limited therapeutic success. This may be because the antioxidants are not selectively taken up by mitochondria, but instead are dispersed throughout the body, ocular tissues and fluids' moieties. This work is an attempt to integrate how mitochondrial reactive oxygen species (ROS) are altered in the aging eye, along with those protective and repair therapeutic systems believed to regulate ROS levels in ocular tissues and how damage to these systems contributes to age-onset eye disease and cataract formation. Mitochondria-targeted antioxidants might be used to effectively prevent ROS-induced oxidation of lipids and proteins in the inner mitochondrial membrane in vivo. The authors developed and patented the new ophthalmic compositions including N-acetylcarnosine acting as a prodrug of naturally targeted to mitochondria l-carnosine endowed with pluripotent antioxidant activities, combined with mitochondria-targeted rechargeable antioxidant (either MitoVit E, Mito Q or SkQs) as a potent medicine to treat ocular diseases. Such specificity is explained by the fact that developed compositions might be used to effectively prevent ROS-induced oxidation of lipids and proteins in the inner mitochondrial membrane in vivo and outside mitochondria in the cellular and tissue structures of the lens and eye compartments. Mitochondrial targeting of compounds with universal types of antioxidant activity represents a promising approach for treating a number of ROS-related ocular diseases of the aging eye and can be implicated in the management of cataracts and primary open-angle glaucoma.
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Affiliation(s)
- Mark A Babizhayev
- Innovative Vision Products, Inc., 3511 Silverside Road, Suite 105, County of New Castle, DE 19810, USA
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99
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Zagryazhskaya A, Surova O, Akbar NS, Allavena G, Gyuraszova K, Zborovskaya IB, Tchevkina EM, Zhivotovsky B. Tudor staphylococcal nuclease drives chemoresistance of non-small cell lung carcinoma cells by regulating S100A11. Oncotarget 2016; 6:12156-73. [PMID: 25940438 PMCID: PMC4494929 DOI: 10.18632/oncotarget.3495] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 03/07/2015] [Indexed: 12/20/2022] Open
Abstract
Lung cancer is the leading cause of cancer-related deaths worldwide. Non-small cell lung cancer (NSCLC), the major lung cancer subtype, is characterized by high resistance to chemotherapy. Here we demonstrate that Tudor staphylococcal nuclease (SND1 or TSN) is overexpressed in NSCLC cell lines and tissues, and is important for maintaining NSCLC chemoresistance. Downregulation of TSN by RNAi in NSCLC cells led to strong potentiation of cell death in response to cisplatin. Silencing of TSN was accompanied by a significant decrease in S100A11 expression at both mRNA and protein level. Downregulation of S100A11 by RNAi resulted in enhanced sensitivity of NSCLC cells to cisplatin, oxaliplatin and 5-fluouracil. AACOCF3, a phospholipase A2 (PLA2) inhibitor, strongly abrogated chemosensitization upon silencing of S100A11 suggesting that PLA2 inhibition by S100A11 governs the chemoresistance of NSCLC. Moreover, silencing of S100A11 stimulated mitochondrial superoxide production, which was decreased by AACOCF3, as well as N-acetyl-L-cysteine, which also mimicked the effect of PLA2 inhibitor on NSCLC chemosensitization upon S100A11 silencing. Thus, we present the novel TSN-S100A11-PLA2 axis regulating superoxide-dependent apoptosis, triggered by platinum-based chemotherapeutic agents in NSCLC that may be targeted by innovative cancer therapies.
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Affiliation(s)
- Anna Zagryazhskaya
- Institute of Environmental Medicine, Division of Toxicology, Stockholm, Sweden
| | - Olga Surova
- Institute of Environmental Medicine, Division of Toxicology, Stockholm, Sweden.,Ludwig Institute for Cancer Research Ltd, Karolinska Institutet, Stockholm, Sweden
| | - Nadeem S Akbar
- Institute of Environmental Medicine, Division of Toxicology, Stockholm, Sweden
| | - Giulia Allavena
- Institute of Environmental Medicine, Division of Toxicology, Stockholm, Sweden.,Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Katarina Gyuraszova
- Institute of Environmental Medicine, Division of Toxicology, Stockholm, Sweden.,Institute of Biology and Ecology, Faculty of Science, Pavol Jozef Šafárik University in Košice, Košice, Slovakia
| | - Irina B Zborovskaya
- NN Blokhin Russian Cancer Research Center, Moscow, Russia.,Faculty of Fundamental Medicine, ML Lomonosov State University, Moscow, Russia
| | - Elena M Tchevkina
- NN Blokhin Russian Cancer Research Center, Moscow, Russia.,Faculty of Fundamental Medicine, ML Lomonosov State University, Moscow, Russia
| | - Boris Zhivotovsky
- Institute of Environmental Medicine, Division of Toxicology, Stockholm, Sweden.,Faculty of Fundamental Medicine, ML Lomonosov State University, Moscow, Russia
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Tryon LD, Vainshtein A, Memme J, Crilly MJ, Hood DA. WITHDRAWN: Relationship between the regulation of muscle atrophy and mitochondrial turnover during chronic disuse. Integr Med Res 2016. [DOI: 10.1016/j.imr.2014.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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