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Januszewski AS, Blake R, Zhang M, Ma B, Anand S, Pinkert CA, Kelly DJ, Jenkins AJ, Trounce IA. Increased Diabetes Complications in a Mouse Model of Oxidative Stress Due to 'Mismatched' Mitochondrial DNA. Antioxidants (Basel) 2024; 13:187. [PMID: 38397785 PMCID: PMC10886269 DOI: 10.3390/antiox13020187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
Associations between chronic diabetes complications and mitochondrial dysfunction represent a subject of major importance, given the diabetes pandemic and high personal and socioeconomic costs of diabetes and its complications. Modelling diabetes complications in inbred laboratory animals is challenging due to incomplete recapitulation of human features, but offer mechanistic insights and preclinical testing. As mitochondrial-based oxidative stress is implicated in human diabetic complications, herein we evaluate diabetes in a unique mouse model that harbors a mitochondrial DNA from a divergent mouse species (the 'xenomitochondrial mouse'), which has mild mitochondrial dysfunction and increased oxidative stress. We use the streptozotocin-induced diabetes model with insulin supplementation, with 20-weeks diabetes. We compare C57BL/6 mice and the 'xenomitochondrial' mouse, with measures of heart and kidney function, histology, and skin oxidative stress markers. Compared to C57BL/6 mice, the xenomitochondrial mouse has increased diabetic heart and kidney damage, with cardiac dysfunction, and increased cardiac and renal fibrosis. Our results show that mitochondrial oxidative stress consequent to divergent mtDNA can worsen diabetes complications. This has implications for novel therapeutics to counter diabetes complications, and for genetic studies of risk, as mtDNA genotypes may contribute to clinical outcomes.
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Affiliation(s)
- Andrzej S. Januszewski
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Fitzroy, VIC 3065, Australia; (A.S.J.); (M.Z.); (B.M.); (D.J.K.); (A.J.J.)
- NHMRC Clinical Trials Centre, The University of Sydney, Sydney, NSW 2006, Australia
- Sydney Pharmacy School, The University of Sydney, Sydney, NSW 2006, Australia
| | - Rachel Blake
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Melbourne, VIC 3002, Australia; (R.B.); (S.A.)
- Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, VIC 3000, Australia
| | - Michael Zhang
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Fitzroy, VIC 3065, Australia; (A.S.J.); (M.Z.); (B.M.); (D.J.K.); (A.J.J.)
| | - Ben Ma
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Fitzroy, VIC 3065, Australia; (A.S.J.); (M.Z.); (B.M.); (D.J.K.); (A.J.J.)
| | - Sushma Anand
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Melbourne, VIC 3002, Australia; (R.B.); (S.A.)
- Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, VIC 3000, Australia
| | - Carl A. Pinkert
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA;
| | - Darren J. Kelly
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Fitzroy, VIC 3065, Australia; (A.S.J.); (M.Z.); (B.M.); (D.J.K.); (A.J.J.)
| | - Alicia J. Jenkins
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Fitzroy, VIC 3065, Australia; (A.S.J.); (M.Z.); (B.M.); (D.J.K.); (A.J.J.)
- NHMRC Clinical Trials Centre, The University of Sydney, Sydney, NSW 2006, Australia
- Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC 3004, Australia
| | - Ian A. Trounce
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Fitzroy, VIC 3065, Australia; (A.S.J.); (M.Z.); (B.M.); (D.J.K.); (A.J.J.)
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Melbourne, VIC 3002, Australia; (R.B.); (S.A.)
- Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, VIC 3000, Australia
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Sharma C, Mazumder A. A Comprehensive Review on Potential Molecular Drug Targets for the Management of Alzheimer's Disease. Cent Nerv Syst Agents Med Chem 2024; 24:45-56. [PMID: 38305393 DOI: 10.2174/0118715249263300231116062740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/25/2023] [Accepted: 10/04/2023] [Indexed: 02/03/2024]
Abstract
Alzheimer's disease (AD) is an onset and incurable neurodegenerative disorder that has been linked to various genetic, environmental, and lifestyle factors. Recent research has revealed several potential targets for drug development, such as the prevention of Aβ production and removal, prevention of tau hyperphosphorylation, and keeping neurons alive. Drugs that target numerous ADrelated variables have been developed, and early results are encouraging. This review provides a concise map of the different receptor signaling pathways associated with Alzheimer's Disease, as well as insight into drug design based on these pathways. It discusses the molecular mechanisms of AD pathogenesis, such as oxidative stress, aging, Aβ turnover, thiol groups, and mitochondrial activities, and their role in the disease. It also reviews the potential drug targets, in vivo active agents, and docking studies done in AD and provides prospects for future drug development. This review intends to provide more clarity on the molecular processes that occur in Alzheimer's patient's brains, which can be of use in diagnosing and preventing the condition.
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Affiliation(s)
- Chanchal Sharma
- Noida Institute of Engineering and Technology (Pharmacy Institute), 19 Knowledge Park-II, Institutional Area, Greater Noida-201306, Uttar Pradesh, India
| | - Avijit Mazumder
- Noida Institute of Engineering and Technology (Pharmacy Institute), 19 Knowledge Park-II, Institutional Area, Greater Noida-201306, Uttar Pradesh, India
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De la Rosa MVG, Patel D, McCann MR, Stringer KA, Rosania GR. Database screening as a strategy to identify endogenous candidate metabolites to probe and assess mitochondrial drug toxicity. Sci Rep 2023; 13:22013. [PMID: 38086883 PMCID: PMC10716408 DOI: 10.1038/s41598-023-49443-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 12/08/2023] [Indexed: 12/18/2023] Open
Abstract
Adverse drug reactions (ADRs) are considered an inherent risk of medication use, and some ADRs have been associated with off-target drug interactions with mitochondria. Metabolites that reflect mitochondrial function may help identify patients at risk of mitochondrial toxicity. We employed a database strategy to identify candidate mitochondrial metabolites that could be clinically useful to identify individuals at increased risk of mitochondrial-related ADRs. This led to L-carnitine being identified as the candidate mitochondrial metabolite. L-carnitine, its acetylated metabolite, acetylcarnitine and other acylcarnitines are mitochondrial biomarkers used to detect inborn errors of metabolism. We hypothesized that changes in L-carnitine disposition, induced by a "challenge test" of intravenous L-carnitine, could identify mitochondrial-related ADRs by provoking variation in L-carnitine and/or acetylcarnitine blood levels. To test this hypothesis, we induced mitochondrial drug toxicity with clofazimine (CFZ) in a mouse model. Following CFZ treatment, mice received an L-carnitine "challenge test". CFZ-induced changes in weight were consistent with previous work and reflect CFZ-induced catabolism. L-carnitine induced differences in whole blood acetylcarnitine concentrations in a manner that was dependent on CFZ treatment. This supports the usefulness of a database strategy for the discovery of candidate metabolite biomarkers of drug toxicity and substantiates the potential of the L-carnitine "challenge test" as a "probe" to identify drug-related toxicological manifestations.
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Affiliation(s)
- Mery Vet George De la Rosa
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48104, USA
| | - Dipali Patel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48104, USA
| | - Marc R McCann
- The NMR Metabolomics Laboratory, Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Kathleen A Stringer
- The NMR Metabolomics Laboratory, Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48109, USA
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
- Weil Institute for Critical Care Research and Innovation, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Gus R Rosania
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48104, USA.
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Chang R, Tang Y, Jia H, Dong Z, Gao S, Song Q, Dong H, Xu Q, Jiang Q, Loor JJ, Sun X, Xu C. Activation of PINK1-mediated mitophagy protects bovine mammary epithelial cells against lipopolysaccharide-induced mitochondrial and inflammatory damage in vitro. Free Radic Biol Med 2023; 194:172-183. [PMID: 36464026 DOI: 10.1016/j.freeradbiomed.2022.11.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/26/2022] [Accepted: 11/30/2022] [Indexed: 12/05/2022]
Abstract
Increased metabolic stress during early lactation results in damage of mitochondria and inflammatory responses in bovine mammary epithelial cells, both of which could be aggravated by inhibition of mitophagy. PTEN-induced putative kinase 1 (PINK1)-mediated mitophagy is essential in the removal of damaged mitochondria and the regulation of inflammatory responses. The aim of the present study was to elucidate the role of PINK1-mediated mitophagy on mitochondrial damage and inflammatory responses in bovine mammary epithelial cells challenged with lipopolysaccharide (LPS). Exogenous LPS activated mitophagy and led to lower protein abundance of oxidative phosphorylation (OXPHOS) complexes (COI-V) and lower oxygen consumption rate (OCR) along with increased mitochondrial reactive oxygen species (Mito-ROS) content. These effects were also associated with increased protein abundance of Nucleotide-binding oligomerization domain-like receptor containing pyrin domain 3 (NLRP3) in a time-dependent manner. Pretreatment with 3-Methyladenine (3-MA) or knockdown of PINK1 aggravated the downregulation of COI-V protein abundance, the increase in Mito-ROS content, and the protein abundance of NLRP3, Cleaved-Caspase-1 and IL-1β induced by LPS. Overexpression of PINK1 activated mitophagy and alleviated LPS-induced NLRP3 inflammasome activation by reducing Mito-ROS production. Overall, the data suggested that PINK1-mediated mitophagy is a crucial anti-inflammatory mechanism that removes damaged mitochondria in bovine mammary epithelial cells experiencing an increased inflammatory load.
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Affiliation(s)
- Renxu Chang
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China; College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Yan Tang
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hongdou Jia
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Zhihao Dong
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shuang Gao
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Qian Song
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hao Dong
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Qiushi Xu
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Qianming Jiang
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, USA
| | - Juan J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, USA
| | - Xudong Sun
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China.
| | - Chuang Xu
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China; College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing, China.
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Bottoni P, Gionta G, Scatena R. Remarks on Mitochondrial Myopathies. Int J Mol Sci 2022; 24:ijms24010124. [PMID: 36613565 PMCID: PMC9820309 DOI: 10.3390/ijms24010124] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/15/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022] Open
Abstract
Mitochondrial myopathies represent a heterogeneous group of diseases caused mainly by genetic mutations to proteins that are related to mitochondrial oxidative metabolism. Meanwhile, a similar etiopathogenetic mechanism (i.e., a deranged oxidative phosphorylation and a dramatic reduction of ATP synthesis) reveals that the evolution of these myopathies show significant differences. However, some physiological and pathophysiological aspects of mitochondria often reveal other potential molecular mechanisms that could have a significant pathogenetic role in the clinical evolution of these disorders, such as: i. a deranged ROS production both in term of signaling and in terms of damaging molecules; ii. the severe modifications of nicotinamide adenine dinucleotide (NAD)+/NADH, pyruvate/lactate, and α-ketoglutarate (α-KG)/2- hydroxyglutarate (2-HG) ratios. A better definition of the molecular mechanisms at the basis of their pathogenesis could improve not only the clinical approach in terms of diagnosis, prognosis, and therapy of these myopathies but also deepen the knowledge of mitochondrial medicine in general.
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Affiliation(s)
- Patrizia Bottoni
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy
| | - Giulia Gionta
- Dipartimento Scienze Anatomiche Istologiche Medico Legali e dell’Apparato Locomotore—Sezione di Anatomia Umana, Università La Sapienza di Roma, Via Alfonso Borelli 50, 00161 Rome, Italy
| | - Roberto Scatena
- Dipartimento di Medicina di Laboratorio, Madre Giuseppina Vannini Hospital, Via di Acqua Bullicante 4, 00177 Rome, Italy
- Correspondence:
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The Role of Hydrogen Sulfide Targeting Autophagy in the Pathological Processes of the Nervous System. Metabolites 2022; 12:metabo12090879. [PMID: 36144282 PMCID: PMC9502065 DOI: 10.3390/metabo12090879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/13/2022] [Accepted: 09/15/2022] [Indexed: 11/16/2022] Open
Abstract
Autophagy is an important cellular process, involving the transportation of cytoplasmic contents in the double membrane vesicles to lysosomes for degradation. Autophagy disorder contributes to many diseases, such as immune dysfunction, cancers and nervous system diseases. Hydrogen sulfide (H2S) is a volatile and toxic gas with a rotten egg odor. For a long time, it was considered as an environmental pollution gas. In recent years, H2S is regarded as the third most important gas signal molecule after NO and CO. H2S has a variety of biological functions and can play an important role in a variety of physiological and pathological processes. Increasingly more evidences show that H2S can regulate autophagy to play a protective role in the nervous system, but the mechanism is not fully understood. In this review, we summarize the recent literatures on the role of H2S in the pathological process of the nervous system by regulating autophagy, and analyze the mechanism in detail, hoping to provide the reference for future related research.
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Liu Y, Chen C, Wang X, Sun Y, Zhang J, Chen J, Shi Y. An Epigenetic Role of Mitochondria in Cancer. Cells 2022; 11:cells11162518. [PMID: 36010594 PMCID: PMC9406960 DOI: 10.3390/cells11162518] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/03/2022] [Accepted: 08/09/2022] [Indexed: 12/14/2022] Open
Abstract
Mitochondria are not only the main energy supplier but are also the cell metabolic center regulating multiple key metaborates that play pivotal roles in epigenetics regulation. These metabolites include acetyl-CoA, α-ketoglutarate (α-KG), S-adenosyl methionine (SAM), NAD+, and O-linked beta-N-acetylglucosamine (O-GlcNAc), which are the main substrates for DNA methylation and histone post-translation modifications, essential for gene transcriptional regulation and cell fate determination. Tumorigenesis is attributed to many factors, including gene mutations and tumor microenvironment. Mitochondria and epigenetics play essential roles in tumor initiation, evolution, metastasis, and recurrence. Targeting mitochondrial metabolism and epigenetics are promising therapeutic strategies for tumor treatment. In this review, we summarize the roles of mitochondria in key metabolites required for epigenetics modification and in cell fate regulation and discuss the current strategy in cancer therapies via targeting epigenetic modifiers and related enzymes in metabolic regulation. This review is an important contribution to the understanding of the current metabolic-epigenetic-tumorigenesis concept.
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Affiliation(s)
- Yu’e Liu
- Tongji University Cancer Center, Shanghai Tenth People’s Hospital of Tongji University, School of Medicine, Tongji University, Shanghai 200092, China
| | - Chao Chen
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China
| | - Xinye Wang
- Tongji University Cancer Center, Shanghai Tenth People’s Hospital of Tongji University, School of Medicine, Tongji University, Shanghai 200092, China
| | - Yihong Sun
- Tongji University Cancer Center, Shanghai Tenth People’s Hospital of Tongji University, School of Medicine, Tongji University, Shanghai 200092, China
| | - Jin Zhang
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Juxiang Chen
- Department of Neurosurgery, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China
- Correspondence: (J.C.); (Y.S.)
| | - Yufeng Shi
- Tongji University Cancer Center, Shanghai Tenth People’s Hospital of Tongji University, School of Medicine, Tongji University, Shanghai 200092, China
- Clinical Center for Brain and Spinal Cord Research, Tongji University, Shanghai 200092, China
- Correspondence: (J.C.); (Y.S.)
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Auld N, Flood K, Kesharwani T, Cavnar PJ. A study on the cellular and cytotoxic effects of S and Se heterocycles on the myeloid leukemia cell line PLB-985. PHOSPHORUS SULFUR 2022; 197:876-884. [PMID: 36970371 PMCID: PMC10035560 DOI: 10.1080/10426507.2022.2085272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This paper describes the synthesis of several halogenated S and Se heterocycles and tests their biological activity by measuring the effects on the myeloid leukemia cell line, PLB-985 cells. We report that select compounds exhibit significant increases in mitochondria membrane potential and increased oxidative stress in PLB-985 cells. Our results contribute to the foundational knowledge of different S and Se containing compounds and their possible impacts on human cells.
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Affiliation(s)
- Niccole Auld
- Department of Biology, University of West Florida, Pensacola, FL, USA
| | - Krystal Flood
- Department of Biology, University of West Florida, Pensacola, FL, USA
| | - Tanay Kesharwani
- Department of Chemistry, University of West Florida, Pensacola, FL, USA
| | - Peter J. Cavnar
- Department of Biology, University of West Florida, Pensacola, FL, USA
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Bottoni P, Pontoglio A, Scarà S, Pieroni L, Urbani A, Scatena R. Mitochondrial Respiratory Complexes as Targets of Drugs: The PPAR Agonist Example. Cells 2022; 11:cells11071169. [PMID: 35406733 PMCID: PMC8997591 DOI: 10.3390/cells11071169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/17/2022] [Accepted: 03/24/2022] [Indexed: 12/02/2022] Open
Abstract
Mitochondrial bioenergetics are progressively acquiring significant pathophysiological roles. Specifically, mitochondria in general and Electron Respiratory Chain in particular are gaining importance as unintentional targets of different drugs. The so-called PPAR ligands are a class of drugs which not only link and activate Peroxisome Proliferator-Activated Receptors but also show a myriad of extrareceptorial activities as well. In particular, they were shown to inhibit NADH coenzyme Q reductase. However, the molecular picture of this intriguing bioenergetic derangement has not yet been well defined. Using high resolution respirometry, both in permeabilized and intact HepG2 cells, and a proteomic approach, the mitochondrial bioenergetic damage induced by various PPAR ligands was evaluated. Results show a derangement of mitochondrial oxidative metabolism more complex than one related to a simple perturbation of complex I. In fact, a partial inhibition of mitochondrial NADH oxidation seems to be associated not only with hampered ATP synthesis but also with a significant reduction in respiratory control ratio, spare respiratory capacity, coupling efficiency and, last but not least, serious oxidative stress and structural damage to mitochondria.
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Affiliation(s)
- Patrizia Bottoni
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy; (A.P.); (S.S.); (A.U.); (R.S.)
- Correspondence:
| | - Alessandro Pontoglio
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy; (A.P.); (S.S.); (A.U.); (R.S.)
| | - Salvatore Scarà
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy; (A.P.); (S.S.); (A.U.); (R.S.)
| | | | - Andrea Urbani
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy; (A.P.); (S.S.); (A.U.); (R.S.)
- Dipartimento di Medicina di Laboratorio, Fondazione Policlinico Gemelli, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Roberto Scatena
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Rome, Italy; (A.P.); (S.S.); (A.U.); (R.S.)
- Dipartimento di Medicina di Laboratorio, Madre Giuseppina Vannini Hospital, Via di Acqua Bullicante 4, 00177 Rome, Italy
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Manousek J, Kala P, Lokaj P, Ondrus T, Helanova K, Miklikova M, Brazdil V, Tomandlova M, Parenica J, Pavkova Goldbergova M, Hlasensky J. Oxidative Stress in Takotsubo Syndrome-Is It Essential for an Acute Attack? Indirect Evidences Support Multisite Impact Including the Calcium Overload-Energy Failure Hypothesis. Front Cardiovasc Med 2021; 8:732708. [PMID: 34738019 PMCID: PMC8562109 DOI: 10.3389/fcvm.2021.732708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/16/2021] [Indexed: 12/28/2022] Open
Abstract
Indirect evidences in reviews and case reports on Takotsubo syndrome (TTS) support the fact that the existence of oxidative stress (OS) might be its common feature in the pre-acute stage. The sources of OS are exogenous (environmental factors including pharmacological and toxic influences) and endogenous, the combination of both may be present, and they are being discussed in detail. OS is associated with several pathological conditions representing TTS comorbidities and triggers. The dominant source of OS electrones are mitochondria. Our analysis of drug therapy related to acute TTS shows many interactions, e.g., cytostatics and glucocorticoids with mitochondrial cytochrome P450 and other enzymes important for OS. One of the most frequently discussed mechanisms in TTS is the effect of catecholamines on myocardium. Yet, their metabolic influence is neglected. OS is associated with the oxidation of catecholamines leading to the synthesis of their oxidized forms - aminochromes. Under pathological conditions, this pathway may dominate. There are evidences of interference between OS, catecholamine/aminochrome effects, their metabolism and antioxidant protection. The OS offensive may cause fast depletion of antioxidant protection including the homocystein-methionine system, whose activity decreases with age. The alteration of effector subcellular structures (mitochondria, sarco/endoplasmic reticulum) and subsequent changes in cellular energetics and calcium turnover may also occur and lead to the disruption of cellular function, including neurons and cardiomyocytes. On the organ level (nervous system and heart), neurocardiogenic stunning may occur. The effects of OS correspond to the effect of high doses of catecholamines in the experiment. Intensive OS might represent "conditio sine qua non" for this acute clinical condition. TTS might be significantly more complex pathology than currently perceived so far.
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Affiliation(s)
- Jan Manousek
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
| | - Petr Kala
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Petr Lokaj
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Tomas Ondrus
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Katerina Helanova
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Marie Miklikova
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
| | - Vojtech Brazdil
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Marie Tomandlova
- Department of Biochemistry, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Jiri Parenica
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | | | - Jiri Hlasensky
- Department of Internal Medicine and Cardiology, University Hospital Brno, Brno, Czechia
- Department of Internal Medicine and Cardiology, Faculty of Medicine, Masaryk University, Brno, Czechia
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Pshenichnyuk SA, Modelli A. Electron Attachment to Isolated Molecules as a Probe to Understand Mitochondrial Reductive Processes. Methods Mol Biol 2021; 2277:101-124. [PMID: 34080147 DOI: 10.1007/978-1-0716-1270-5_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This chapter describes the complementary experimental techniques Electron Transmission Spectroscopy and Dissociative Electron Attachment Spectroscopy, two of the most suitable means for investigating interactions between electrons and gas-phase molecules, resonance formation of temporary molecular negative ions, and their possible decay through the dissociative electron attachment (DEA) mechanism. The latter can be seen as the gas-phase counterpart of the transfer of a solvated electron in solution, accompanied by dissociation of the molecular anion, referred to as dissociative electron transfer (DET). DET takes place in vivo under reductive conditions, for instance, in the intermembrane space of mitochondria under interaction of xenobiotic molecules possessing high electron affinity with electrons "leaked" from the mitochondrial respiratory chain. A likely mechanism of the toxic activity of dichlorodiphenyltrichloroethane based on its DEA properties is briefly outlined, and compared with the well-established harmful effects of the model toxicant carbon tetrachloride ascribed to reductive dechlorination in a cellular ambient. A possible mechanism of the antioxidant activity of polyphenolic compounds present near the main site of superoxide anion production in mitochondria is also briefly discussed.
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Affiliation(s)
- Stanislav A Pshenichnyuk
- Institute of Molecule and Crystal Physics, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa, Russia.
| | - Alberto Modelli
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, Bologna, Italy
- Centro Interdipartimentale di Ricerca in Scienze Ambientali, Ravenna, Italy
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12
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Tajada S, Villalobos C. Calcium Permeable Channels in Cancer Hallmarks. Front Pharmacol 2020; 11:968. [PMID: 32733237 PMCID: PMC7358640 DOI: 10.3389/fphar.2020.00968] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 06/15/2020] [Indexed: 12/17/2022] Open
Abstract
Cancer, the second cause of death worldwide, is characterized by several common criteria, known as the “cancer hallmarks” such as unrestrained cell proliferation, cell death resistance, angiogenesis, invasion and metastasis. Calcium permeable channels are proteins present in external and internal biological membranes, diffusing Ca2+ ions down their electrochemical gradient. Numerous physiological functions are mediated by calcium channels, ranging from intracellular calcium homeostasis to sensory transduction. Consequently, calcium channels play important roles in human physiology and it is not a surprise the increasing number of evidences connecting calcium channels disorders with tumor cells growth, survival and migration. Multiple studies suggest that calcium signals are augmented in various cancer cell types, contributing to cancer hallmarks. This review focuses in the role of calcium permeable channels signaling in cancer with special attention to the mechanisms behind the remodeling of the calcium signals. Transient Receptor Potential (TRP) channels and Store Operated Channels (SOC) are the main extracellular Ca2+ source in the plasma membrane of non-excitable cells, while inositol trisphosphate receptors (IP3R) are the main channels releasing Ca2+ from the endoplasmic reticulum (ER). Alterations in the function and/or expression of these calcium channels, as wells as, the calcium buffering by mitochondria affect intracellular calcium homeostasis and signaling, contributing to the transformation of normal cells into their tumor counterparts. Several compounds reported to counteract several cancer hallmarks also modulate the activity and/or the expression of these channels including non-steroidal anti-inflammatory drugs (NSAIDs) like sulindac and aspirin, and inhibitors of polyamine biosynthesis, like difluoromethylornithine (DFMO). The possible role of the calcium permeable channels targeted by these compounds in cancer and their action mechanism will be discussed also in the review.
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Affiliation(s)
- Sendoa Tajada
- Instituto de Biología y Genética Molecular (IBGM), Universidad de Valladolid and Consejo Superior de Investigaciones Científicas (CSIC), Valladolid, Spain
| | - Carlos Villalobos
- Instituto de Biología y Genética Molecular (IBGM), Universidad de Valladolid and Consejo Superior de Investigaciones Científicas (CSIC), Valladolid, Spain
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13
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Singh MV, Kotla S, Le NT, Ae Ko K, Heo KS, Wang Y, Fujii Y, Thi Vu H, McBeath E, Thomas TN, Jin Gi Y, Tao Y, Medina JL, Taunton J, Carson N, Dogra V, Doyley MM, Tyrell A, Lu W, Qiu X, Stirpe NE, Gates KJ, Hurley C, Fujiwara K, Maggirwar SB, Schifitto G, Abe JI. Senescent Phenotype Induced by p90RSK-NRF2 Signaling Sensitizes Monocytes and Macrophages to Oxidative Stress in HIV-Positive Individuals. Circulation 2019; 139:1199-1216. [PMID: 30586719 DOI: 10.1161/circulationaha.118.036232] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The incidence of cardiovascular disease is higher in HIV-positive (HIV+) patients than it is in the average population, and combination antiretroviral therapy (cART) is a recognized risk factor for cardiovascular disease. However, the molecular mechanisms that link cART and cardiovascular disease are currently unknown. Our study explores the role of the activation of p90RSK, a reactive oxygen species-sensitive kinase, in engendering senescent phenotype in macrophages and accelerating atherogenesis in patients undergoing cART. METHODS Peripheral whole blood from cART-treated HIV+ individuals and nontreated HIV-negative individuals was treated with H2O2 (200 µmol/L) for 4 minutes, and p90RSK activity in CD14+ monocytes was measured. Plaque formation in the carotids was also analyzed in these individuals. Macrophage senescence was determined by evaluating their efferocytotic ability, antioxidation-related molecule expression, telomere length, and inflammatory gene expression. The involvement of p90RSK-NRF2 signaling in cART-induced senescence was assessed by p90RSK-specific inhibitor (FMK-MEA) or dominant-negative p90RSK (DN-p90RSK) and NRF2 activator (NRF2A). Further, the severity of atherosclerosis was determined in myeloid cell-specific wild-type and DN-p90RSK transgenic mice. RESULTS Monocytes from HIV+ patients exhibited higher levels of p90RSK activity and were also more sensitive to reactive oxygen species than monocytes from HIV-negative individuals. A multiple linear regression analysis involving cART, Reynolds cardiovascular risk score, and basal p90RSK activity revealed that cART and basal p90RSK activity were the 2 significant determinants of plaque formation. Many of the antiretroviral drugs individually activated p90RSK, which simultaneously triggered all components of the macrophage senescent phenotype. cART inhibited antioxidant response element reporter activity via ERK5 S496 phosphorylation. NRF2A reversed the H2O2-induced overactivation of p90RSK in cART-treated macrophages by countering the induction of senescent phenotype. Last, the data obtained from our gain- or loss-of-function mice conclusively showed the crucial role of p90RSK in inducing senescent phenotype in macrophages and atherogenesis. CONCLUSIONS cART increased monocyte/macrophage sensitivity to reactive oxygen species- in HIV+ individuals by suppressing NRF2-ARE activity via p90RSK-mediated ERK5 S496 phosphorylation, which coordinately elicited senescent phenotypes and proinflammatory responses. As such, our report underscores the importance of p90RSK regulation in monocytes/macrophages as a viable biomarker and therapeutic target for preventing cardiovascular disease, especially in HIV+ patients treated with cART.
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Affiliation(s)
- Meera V Singh
- Departments of Microbiology and Immunology (M.V.S., N.E.S., K.J.G., S.B.M.), University of Rochester, NY
| | - Sivareddy Kotla
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.).,Radiology Research (S.K., N.-T.L., K.A.K.), Houston Methodist Research Institute, TX
| | - Nhat-Tu Le
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.).,Departments of Cardiovascular Sciences (N.-T.L.), Houston Methodist Research Institute, TX.,Radiology Research (S.K., N.-T.L., K.A.K.), Houston Methodist Research Institute, TX
| | - Kyung Ae Ko
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.).,Radiology Research (S.K., N.-T.L., K.A.K.), Houston Methodist Research Institute, TX
| | - Kyung-Sun Heo
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.).,Institute of Drug Research and Development, Chungnam National University, Daejeon, Republic of Korea (K.-S.H.)
| | - Yin Wang
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Yuka Fujii
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Hang Thi Vu
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Elena McBeath
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Tamlyn N Thomas
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Young Jin Gi
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Yunting Tao
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Jan L Medina
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Jack Taunton
- Department of Cellular and Molecular Pharmacology, University of California-San Francisco (J.T.)
| | - Nancy Carson
- Imaging Sciences (N.C., V.D.), University of Rochester, NY
| | - Vikram Dogra
- Imaging Sciences (N.C., V.D.), University of Rochester, NY
| | - Marvin M Doyley
- Electrical and Computer Engineering (M.M.D.), University of Rochester, NY
| | - Alicia Tyrell
- Biostatistics and Computational Biology (A.T., W.L., X.Q.), University of Rochester, NY
| | - Wang Lu
- Biostatistics and Computational Biology (A.T., W.L., X.Q.), University of Rochester, NY
| | - Xing Qiu
- Biostatistics and Computational Biology (A.T., W.L., X.Q.), University of Rochester, NY
| | - Nicole E Stirpe
- Departments of Microbiology and Immunology (M.V.S., N.E.S., K.J.G., S.B.M.), University of Rochester, NY
| | - Kathleen J Gates
- Departments of Microbiology and Immunology (M.V.S., N.E.S., K.J.G., S.B.M.), University of Rochester, NY
| | - Christine Hurley
- Medicine, Infectious Disease (C.H.), University of Rochester, NY
| | - Keigi Fujiwara
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
| | - Sanjay B Maggirwar
- Departments of Microbiology and Immunology (M.V.S., N.E.S., K.J.G., S.B.M.), University of Rochester, NY
| | | | - Jun-Ichi Abe
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston (S.K., N.-T.L., K.A.K., K.-S.H., Y.W., Y.F., H.T.V., E.M., T.N.T., Y.J.G., Y.T., J.L.M., K.F., J.-i.A.)
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Dugbartey GJ, Redington AN. Prevention of contrast-induced nephropathy by limb ischemic preconditioning: underlying mechanisms and clinical effects. Am J Physiol Renal Physiol 2018; 314:F319-F328. [DOI: 10.1152/ajprenal.00130.2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Contrast-induced nephropathy (CIN) is an important complication following diagnostic radiographic imaging and interventional therapy. It results from administration of intravascular iodinated contrast media (CM) and is currently the third most common cause of hospital-acquired acute kidney injury. CIN is associated with increased morbidity, prolonged hospitalization, and higher mortality. Although the importance of CIN is widely appreciated, and its occurrence can be mitigated by the use of pre- and posthydration protocols and low osmolar instead of high osmolar iodine-containing CM, specific prophylactic therapy is lacking. Remote ischemic preconditioning (RIPC), induced through short cycles of ischemia-reperfusion applied to the limb, is an intriguing new strategy that has been shown to reduce myocardial infarction size in patients undergoing emergency percutaneous coronary intervention. Furthermore, multiple proof-of-principle clinical studies have suggested benefit in several other ischemia-reperfusion syndromes, including stroke. Perhaps somewhat surprisingly, RIPC also is emerging as a promising strategy for CIN prevention. In this review, we discuss current clinical and experimental developments regarding the biology of CIN, concentrating on the pathophysiology of CIN, and cellular and molecular mechanisms by which limb ischemic preconditioning may confer renal protection in clinical and experimental models of CIN.
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Affiliation(s)
- George J. Dugbartey
- Division of Cardiology, The Heart Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Andrew N. Redington
- Division of Cardiology, The Heart Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
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15
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Kretschmer M, Lambie S, Croll D, Kronstad JW. Acetate provokes mitochondrial stress and cell death in Ustilago maydis. Mol Microbiol 2018; 107:488-507. [PMID: 29235175 DOI: 10.1111/mmi.13894] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 12/06/2017] [Accepted: 12/08/2017] [Indexed: 12/30/2022]
Abstract
The fungal pathogen Ustilago maydis causes disease on maize by mating to establish an infectious filamentous cell type that invades the host and induces tumours. We previously found that β-oxidation mutants were defective in virulence and did not grow on acetate. Here, we demonstrate that acetate inhibits filamentation during mating and in response to oleic acid. We therefore examined the influence of different carbon sources by comparing the transcriptomes of cells grown on acetate, oleic acid or glucose, with expression changes for the fungus during tumour formation in planta. Guided by the transcriptional profiling, we found that acetate negatively influenced resistance to stress, promoted the formation of reactive oxygen species, triggered cell death in stationary phase and impaired virulence on maize. We also found that acetate induced mitochondrial stress by interfering with mitochondrial functions. Notably, the disruption of oxygen perception or inhibition of the electron transport chain also influenced filamentation and mating. Finally, we made use of the connections between acetate and β-oxidation to test metabolic inhibitors for an influence on growth and virulence. These experiments identified diclofenac as a potential inhibitor of virulence. Overall, these findings support the possibility of targeting mitochondrial metabolic functions to control fungal pathogens.
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Affiliation(s)
- Matthias Kretschmer
- Michael Smith Laboratories, Department of Microbiology and Immunology, and Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Scott Lambie
- Michael Smith Laboratories, Department of Microbiology and Immunology, and Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Daniel Croll
- Michael Smith Laboratories, Department of Microbiology and Immunology, and Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Laboratory of Evolutionary Genetics, Institute of Biology, University of Neuchâtel, CH-2000 Neuchâtel, Switzerland
| | - James W Kronstad
- Michael Smith Laboratories, Department of Microbiology and Immunology, and Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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16
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Protein Kinase A/CREB Signaling Prevents Adriamycin-Induced Podocyte Apoptosis via Upregulation of Mitochondrial Respiratory Chain Complexes. Mol Cell Biol 2017; 38:MCB.00181-17. [PMID: 29038164 DOI: 10.1128/mcb.00181-17] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 09/14/2017] [Indexed: 12/26/2022] Open
Abstract
Previous work showed that the activation of protein kinase A (PKA) signaling promoted mitochondrial fusion and prevented podocyte apoptosis. The cAMP response element binding protein (CREB) is the main downstream transcription factor of PKA signaling. Here we show that the PKA agonist 8-(4-chlorophenylthio)adenosine 3',5'-cyclic monophosphate-cyclic AMP (pCPT-cAMP) prevented the production of adriamycin (ADR)-induced reactive oxygen species and apoptosis in podocytes, which were inhibited by CREB RNA interference (RNAi). The activation of PKA enhanced mitochondrial function and prevented the ADR-induced decrease of mitochondrial respiratory chain complex I subunits, NADH-ubiquinone oxidoreductase complex (ND) 1/3/4 genes, and protein expression. Inhibition of CREB expression alleviated pCPT-cAMP-induced ND3, but not the recovery of ND1/4 protein, in ADR-treated podocytes. In addition, CREB RNAi blocked the pCPT-cAMP-induced increase in ATP and the expression of peroxisome proliferator-activated receptor gamma coactivator 1 alpha (PGC1-α). The chromatin immunoprecipitation assay showed enrichment of CREB on PGC1-α and ND3 promoters, suggesting that these promoters are CREB targets. In vivo, both an endogenous cAMP activator (isoproterenol) and pCPT-cAMP decreased the albumin/creatinine ratio in mice with ADR nephropathy, reduced glomerular oxidative stress, and retained Wilm's tumor suppressor gene 1 (WT-1)-positive cells in glomeruli. We conclude that the upregulation of mitochondrial respiratory chain proteins played a partial role in the protection of PKA/CREB signaling.
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Yang JL, Lien JC, Chen YY, Hsu SC, Chang SJ, Huang AC, Amagaya S, Funayana S, Wood WG, Kuo CL, Chung JG. Crude extract of Euphorbia formosana induces apoptosis of DU145 human prostate cancer cells acts through the caspase-dependent and independent signaling pathway. ENVIRONMENTAL TOXICOLOGY 2016; 31:1600-1611. [PMID: 26122529 DOI: 10.1002/tox.22164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 06/07/2015] [Indexed: 06/04/2023]
Abstract
Prostate cancer is the most frequently diagnosed malignancy in men and the second highest contributor of male cancer mortality. The crude extract of Euphorbia formosana (CEEF) has been used for treatment of different diseases but the cytotoxic effects of CEEF on human cancer cells have not been reported. The purpose of the present experiments was to determine effects of CEEF on cell cycle distribution and induction of apoptosis in DU145 human prostate cancer cells in vitro. Contrast-phase microscope was used for examining cell morphological changes. Flow cytometric assays were used for cell viability, cell cycle, apoptosis, reactive oxygen species, and Ca2+ production and mitochondria membrane potential (ΔΨm ). Western blotting was used for examining protein expression of cell cycle and apoptosis associated proteins. Real-time PCR was used for examining mRNA levels of caspase-3, -8, and -9, AIF, and Endo G. Confocal laser microscope was used to examine the translocation of AIF, Endo G, and cytochrome in DU145 cells after CEEF exposure. CEEF-induced cell morphological changes, decreased the percentage of viable cells, and induced S phase arrest and apoptosis in DU145 cells. Furthermore, CEEF promoted RAS and Ca2+ production and reduced ΔΨm levels. Real-time QPCR confirmed that CEEF promoted the mRNA expression of caspase-3 and -9, AIF and Endo G and we found that AIF and Endo G and cytochrome c were released from mitochondria. Taken together, CEEF-induced cytotoxic effects via ROS production, induced S phase arrest and induction of apoptosis through caspase-dependent and independent and mitochondria-dependent pathways in DU245 cancer cells. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1600-1611, 2016.
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Affiliation(s)
- Jiun-Long Yang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung, 404, Taiwan
| | - Jin-Cherng Lien
- Graduate Institute of Pharmaceutical Chemistry, China Medical University, Taichung, 404, Taiwan
| | - Ya-Yin Chen
- Department of Chinese-Western Medicine Integration, Chung Shan Medical University Hospital, Taichung, 402, Taiwan
- School of Medicine, Chung Shan Medical University, Taichung, 402, Taiwan
| | - Shu-Chun Hsu
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Shu-Jen Chang
- School of Pharmacy, China Medical University, Taichung, 404, Taiwan
| | - An-Cheng Huang
- Department of Nursing, St. Mary's Medicine Nursing and Management College, Yilan, 266, Taiwan
| | - Sakae Amagaya
- Department of Kampo Pharmaceutical Sciences, Nihon Pharmaceutical University, Saitama, Japan
| | - Shinji Funayana
- Department of Medicinal Chemistry, Nihon Pharmaceutical University, Saitama, Japan
| | - W Gibson Wood
- Department of Pharmacology, University of Minnesota, School of Medicine, Geriatric Research, Education and Clinical Center, VA Medical Center, Minneapolis, Minnesota, 55455, USA
| | - Chao-Lin Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung, 404, Taiwan.
| | - Jing-Gung Chung
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan.
- Department of Biotechnology, Asia University, Taichung, 413, Taiwan.
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Girin SV, Savinova IV, Antonenko IV, Naumenko NV. The Effect of Ultra Low Concentrations of Some Biologically Active Substances on the Aerobic Respiration. Cell 2016. [DOI: 10.4236/cellbio.2016.51001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Oxaliplatin-induced Oxidative Stress Provokes Toxicity in Isolated Rat Liver Mitochondria. Arch Med Res 2015; 46:597-603. [DOI: 10.1016/j.arcmed.2015.10.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 10/27/2015] [Indexed: 01/05/2023]
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20
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Pshenichnyuk SA, Modelli A. ETS and DEAS studies of the reduction of xenobiotics in mitochondrial intermembrane space. Methods Mol Biol 2015; 1265:285-305. [PMID: 25634282 DOI: 10.1007/978-1-4939-2288-8_20] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This chapter describes the complementary experimental techniques electron transmission spectroscopy (ETS) and dissociative electron attachment spectroscopy (DEAS), two of the most suitable means for investigating interactions between electrons and gas-phase molecules, resonance formation of temporary molecular negative ions, and their possible decay through the dissociative electron attachment (DEA) mechanism. The latter can be seen as the gas-phase counterpart of the transfer of a solvated electron in solution, accompanied by dissociation of the molecular anion, referred to as dissociative electron transfer (DET). DET takes place in vivo under reductive conditions, for instance, in the intermembrane space of mitochondria under interaction of xenobiotic molecules with electrons "leaked" from the respiration chain. Experimental procedures supported by suitable quantum chemical calculations are described in detail and illustrated by an example of ETS/DEAS study of rhodanine which shows rich fragmentation under gas-phase resonance electron attachment.
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Affiliation(s)
- Stanislav A Pshenichnyuk
- Institute of Molecule and Crystal Physics, Ufa Research Centre, Russian Academy of Sciences, Prospeкt Oktyabrya 151, 450075, Ufa, Russia,
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Zenger K, Dutta S, Wolff H, Genton MG, Kraus B. In vitro structure-toxicity relationship of chalcones in human hepatic stellate cells. Toxicology 2015. [DOI: 10.1016/j.tox.2015.07.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Xu J, Zeng F, Wu H, Wu S. A mitochondrial-targeting and NO-based anticancer nanosystem with enhanced photo-controllability and low dark-toxicity. J Mater Chem B 2015; 3:4904-4912. [PMID: 32262679 DOI: 10.1039/c5tb00522a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Compared to the generation of singlet oxygen in photodynamic therapy, photo-generation of nitric oxide (NO) would not be limited by the concentration of molecular oxygen. However, therapeutic applications of exogenous nitric oxide are usually limited by its short half-life and its vulnerability to many biological substances, thus straightforward and precise control over NO delivery may be critical to its therapeutic effects. Herein, we demonstrate a mitochondrial-targeting and photoactive NO-releasing system as an anticancer drug. Fabricated by covalently incorporating a photo-responsive NO-donor and a mitochondrial targeting ligand onto carbon dots, this nanosystem exhibits a multi-functional nature which combines mitochondrial-targeting, photocontrollable NO-releasing and cell imaging. Upon cellular internalization, the nanosystem could target mitochondria effectively. Furthermore, the system displays little dark toxicity under physiological temperature; but upon light irradiation, it could release NO, efficiently damage mitochondria and consequently cause prominent apoptosis of cancer cells. Moreover, evaluated by using MTT assay, this nanosystem shows high cytotoxicity towards two cancer cell lines. These observations provide new insights for exploiting NO in disease therapy.
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Affiliation(s)
- Jiangsheng Xu
- College of Materials Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 510640, China.
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Liu T, Fang Y, Liu S, Yu X, Zhang H, Liang M, Ding X. Limb ischemic preconditioning protects against contrast-induced acute kidney injury in rats via phosphorylation of GSK-3β. Free Radic Biol Med 2015; 81:170-82. [PMID: 25451640 DOI: 10.1016/j.freeradbiomed.2014.10.509] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 10/16/2014] [Accepted: 10/17/2014] [Indexed: 12/31/2022]
Abstract
Contrast-induced acute kidney injury (CI-AKI) resulting from the use of intravascular iodinated contrast media for diagnostic and interventional cardiovascular procedures is associated with substantial morbidity and mortality. Despite preventative measures intended to mitigate the risk of CI-AKI, there remains a need for a novel and effective therapeutic approach. Limb ischemic preconditioning (LIPC), where short-term ischemia/reperfusion is applied to an arm prior to administration of the contrast agent, has been shown in several trials to preserve renal function in patients at high risk for CI-AKI. However, the underlying mechanism by which this procedure provides renoprotection against contrast media insults is not known. Here, we explored the molecular mechanism(s) of LIPC-induced protection of the kidneys from CI-AKI, particularly the role of phosphorylated glycogen synthase kinase-3β (GSK-3β). We used a novel CI-AKI model consisting of 5/6 nephrectomized (NE) rats at 6 weeks after the ablative surgery. LIPC- or sham-treated rats were administered iohexol (10 ml/kg, 3.5 gI) via the tail vein. The results showed that LIPC protected the kidneys against iohexol-induced injury. This protective effect was accompanied by the attenuation of renal dysfunction, tubular damage, apoptosis, mitochondrial swelling, oxidative stress, and inflammation. Furthermore, LIPC-induced renoprotection was blocked via treatment with inhibitors of PI3K (wortmannin or LY294002), but not ERK (U0126 or PD98059). LIPC also increased the protein expression levels of phospho-Akt, phospho-GSK-3β, and nuclear Nrf2, and decreased the levels of nuclear NF-κB. A specific GSK-3β inhibitor (SB216763) mimicked this effect of LIPC, by inhibiting the opening of the mitochondrial permeability transition pore and reducing the levels of oxidative stress and inflammation via activation of Nrf2 and suppression of NF-κB. The above results demonstrate that LIPC induces protection against CI-AKI, making this procedure a promising strategy for preventing CI-AKI. In particular, this renoprotective effect involves the phosphorylation of GSK-3β.
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Affiliation(s)
- Tongqiang Liu
- Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai 200032, China; Division of Nephrology, the Affiliated Changzhou No. 2 Hospital of Nanjing Medical College, Changzhou 213003, Jiangsu, China
| | - Yi Fang
- Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai 200032, China; Shanghai Institute of Kidney and Dialysis, Shanghai 200032, China
| | - Shaopeng Liu
- Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Xiaofang Yu
- Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai 200032, China; Shanghai Institute of Kidney and Dialysis, Shanghai 200032, China
| | - Hui Zhang
- Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Mingyu Liang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53201, USA
| | - Xiaoqiang Ding
- Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai 200032, China; Shanghai Institute of Kidney and Dialysis, Shanghai 200032, China.
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Rossignol R. Energy metabolism disorders in rare and common diseases. Toward bioenergetic modulation therapy and the training of a new generation of European scientists. Int J Biochem Cell Biol 2015; 63:2-9. [PMID: 25595463 DOI: 10.1016/j.biocel.2015.01.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Energy metabolism alterations are found in a large number of rare and common diseases of genetic or environmental origin. The number of patients that could benefit from bioenergetic modulation therapy (BIOMET) is therefore very important and includes individuals with pathologies as diverse as mitochondrial diseases, acute coronary syndrome, chronic kidney disease, asthma or even cancer. Although, the alteration of energy metabolism is disease specific and sometimes patient specific, the strategies for BIOMET could be common and target a series of bioenergetic regulatory mechanisms discussed in this article. An excellent training of scientists in the field of energy metabolism, related human diseases and drug discovery is also crucial to form a young generation of MDs, PHDs and Pharma or CRO-group leaders who will discover novel personalized bioenergetic medicines, through pharmacology, genetics, nutrition or adapted exercise training. The Mitochondrial European Educational Training (MEET) consortium was created to pursue this goal, and we dedicated here a special issue of Organelle in Focus (OiF) to highlight their objectives. A total of 10 OiFs articles constitute this Directed Issue on Mitochondrial Medicine. As part of this editorial article, we asked timely questions to the PR. Jan W. Smeitink, professor of Mitochondrial Medicine and CEO of Khondrion, a mitochondrial medicine company. He shared with us his objectives and strategies for the study of mitochondrial diseases and the identification of future treatments. This article is part of a Directed Issue entitled: Energy Metabolism Disorders and Therapies.
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Affiliation(s)
- Rodrigue Rossignol
- The International Journal of Biochemistry and Cell Biology, EA4576 MRGM, University of Bordeaux, CHU Pellegrin, Place Amélie-Raba Léon, 33076 Bordeaux Cedex, France.
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Flanagan S, McKee EE, Das D, Tulkens PM, Hosako H, Fiedler-Kelly J, Passarell J, Radovsky A, Prokocimer P. Nonclinical and pharmacokinetic assessments to evaluate the potential of tedizolid and linezolid to affect mitochondrial function. Antimicrob Agents Chemother 2015; 59:178-85. [PMID: 25331703 PMCID: PMC4291347 DOI: 10.1128/aac.03684-14] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 10/14/2014] [Indexed: 11/20/2022] Open
Abstract
Prolonged treatment with the oxazolidinone linezolid is associated with myelosuppression, lactic acidosis, and neuropathies, toxicities likely caused by impairment of mitochondrial protein synthesis (MPS). To evaluate the potential of the novel oxazolidinone tedizolid to cause similar side effects, nonclinical and pharmacokinetic assessments were conducted. In isolated rat heart mitochondria, tedizolid inhibited MPS more potently than did linezolid (average [± standard error of the mean] 50% inhibitory concentration [IC50] for MPS of 0.31 ± 0.02 μM versus 6.4 ± 1.2 μM). However, a rigorous 9-month rat study comparing placebo and high-dose tedizolid (resulting in steady-state area under the plasma concentration-time curve values about 8-fold greater than those with the standard therapeutic dose in humans) showed no evidence of neuropathy. Additional studies explored why prolonged, high-dose tedizolid did not cause these mitochondriopathic side effects despite potent MPS inhibition by tedizolid. Murine macrophage (J774) cell fractionation studies found no evidence of a stable association of tedizolid with eukaryotic mitochondria. Monte Carlo simulations based on population pharmacokinetic models showed that over the course of a dosing interval using standard therapeutic doses, free plasma concentrations fell below the respective MPS IC50 in 84% of tedizolid-treated patients (for a median duration of 7.94 h) and 38% of linezolid-treated patients (for a median duration of 0 h). Therapeutic doses of tedizolid, but not linezolid, may therefore allow for mitochondrial recovery during antibacterial therapy. The overall results suggest that tedizolid has less potential to cause myelosuppression and neuropathy than that of linezolid during prolonged treatment courses. This, however, remains a hypothesis that must be confirmed in clinical studies.
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Affiliation(s)
| | - Edward E McKee
- College of Medicine, Central Michigan University, Mount Pleasant, Michigan, USA
| | - Debaditya Das
- Louvain Drug Research Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Paul M Tulkens
- Louvain Drug Research Institute, Université Catholique de Louvain, Brussels, Belgium
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Hu Q, Gao M, Feng G, Liu B. Mitochondria-Targeted Cancer Therapy Using a Light-Up Probe with Aggregation-Induced-Emission Characteristics. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408897] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Hu Q, Gao M, Feng G, Liu B. Mitochondria-targeted cancer therapy using a light-up probe with aggregation-induced-emission characteristics. Angew Chem Int Ed Engl 2014; 53:14225-9. [PMID: 25318447 DOI: 10.1002/anie.201408897] [Citation(s) in RCA: 283] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Indexed: 12/19/2022]
Abstract
Subcellular organelle-specific reagents for simultaneous tumor targeting, imaging, and treatment are of enormous interest in cancer therapy. Herein, we present a mitochondria-targeting probe (AIE-mito-TPP) by conjugating a triphenylphosphine (TPP) with a fluorogen which can undergo aggregation-induced emission (AIE). Owing to the more negative mitochondrial membrane potential of cancer cells than normal cells, the AIE-mito-TPP probe can selectively accumulate in cancer-cell mitochondria and light up its fluorescence. More importantly, the probe exhibits selective cytotoxicity for studied cancer cells over normal cells. The high potency of AIE-mito-TPP correlates with its strong ability to aggregate in mitochondria, which can efficiently decrease the mitochondria membrane potential and increase the level of intracellular reactive oxygen species (ROS) in cancer cells. The mitochondrial light-up probe provides a unique strategy for potential image-guided therapy of cancer cells.
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Affiliation(s)
- Qinglian Hu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585 (Singapore)
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Xu J, Zeng F, Wu H, Hu C, Yu C, Wu S. Preparation of a mitochondria-targeted and NO-releasing nanoplatform and its enhanced pro-apoptotic effect on cancer cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3750-60. [PMID: 24833029 DOI: 10.1002/smll.201400437] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 04/09/2014] [Indexed: 05/28/2023]
Abstract
The therapeutic applications of exogenous nitric oxide are usually limited by its short half-life and its vulnerability to many biological substances, thus straightforward and precise spatiotemporal control of NO delivery may be critical to its therapeutic effects. Herein, the mitochondria-targeted and photoresponsive NO-releasing nanosystem is demonstrated as a new approach for cancer treatment. The nanosystem is fabricated by covalently incorporating a NO photo-donor and a mitochondria targeting ligand onto carbon-dots; accordingly, multi-functionalities (mitochondria-targeting, light-enhanced efficient NO-releasing, and cell imaging) are achieved. The in vitro NO release profiles for the nanosystem show that the duration of NO release from the present C-dot-based nanosystem containing immobilized SNO can be extended up to 8 hours or more. Upon cellular internalization, the nanosystem can target mitochondria and release NO. The action of the nanosystem on three cancer cell lines is evaluated; it is found that the targeted NO-releasing system can cause high cytotoxicity towards the cancer cells by specifically damaging their mitochondria. Additionally, light irradiation can amplify the cell apoptosis by enhancing NO release. These observations demonstrate that incorporating mitochondria-targeting ligand onto a NO-releasing system can enhance its pro-apoptosis action, thereby providing new insights for exploiting NO in cancer therapy.
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Affiliation(s)
- Jiangsheng Xu
- College of Materials Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 510640, China
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Pereira LC, Miranda LFC, de Souza AO, Dorta DJ. BDE-154 induces mitochondrial permeability transition and impairs mitochondrial bioenergetics. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2014; 77:24-36. [PMID: 24555644 DOI: 10.1080/15287394.2014.861337] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Brominated flame retardants are used in various consumer goods to make these materials difficult to burn. Polybrominated diphenyl ethers (PBDE), which are representative of this class of retardants, consist of two benzene rings linked by an oxygen atom, and contain between 1 and 10 bromine atoms in their chemical structure, with the possibility of up to 209 different congeners. Among these congeners, BDE-154 (hexa-BDE) is persistent in the environment and easy to detect in the biota, but no apparent information regarding the mechanism underlying action and toxicity is available. Mitochondria, as the main energy-producing organelles, play an important role in the maintenance of various cellular functions. Therefore, mitochondria were used in the present study as an experimental model to determine the effects of BDE-154 congener at concentrations ranging from 0.1 μM to 50 μM. Our results demonstrated that BDE-154 interacts with the mitochondrial membrane, preferably by inserting into the hydrophobic core of the mitochondrial membrane, which partially inhibits respiration, dissipates Δψ, and permeabilizes the inner mitochondrial membrane to deplete ATP. These effects are more pronounced at concentrations equal to or higher than 10 μM. Results also showed that BDE-154 did not induce reactive oxygen species (ROS) accumulation within the mitochondria, indicating the absence of oxidative stress. Therefore, BDE-154 impairs mitochondrial bioenergetics and permeabilizes the mitochondrial membrane, potentially leading to cell death but not via mechanisms involving oxidative stress.
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Affiliation(s)
- Lílian Cristina Pereira
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Departamento de Análises Clínicas , Toxicológicas e Bromatológicas, Universidade de São Paulo , Ribeirão Preto , São Paulo , Brasil
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Babich LG, Shlykov SG, Boĭko VI, Kliachina MA, Kosterin SA. [Calix[4]arenes C-136 and C-137 hyperpolarize myometrium mitochondria membranes]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2013; 39:728-35. [PMID: 25696934 DOI: 10.1134/s1068162013050026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Calixarenes--supramolecular compounds interacting with bioactive molecules and ions that causes the changes in biochemical and biophysical processes. The aim of this work was to study the effects of calix[4]arenes C-136, C-137 and C-138 on the level of polarization of rat myometrium mitochondria membrane. Structure of synthesized calix[4]arene molecules was confirmed by the methods of 1H NMR and infra-red spectroscopy. Calix[4]arenes C-136 and C-137 possess two chalcone amide moieties at the lower rim, while the calix[4]arene C-138--only one. In case of calix[4]arenes C-136 and C-137 take place, accordingly, absence or presence of phenolic hydroxyl groups at the lower rim on the calix[4]arene skeleton. It was shown that calix[4]arenes C-136, C-137 and C-138 form micelles in a water medium and in the dimethylformamide (DMF). The irradiation of micelles with argon laser on flow cytometer results in appearance of autofluorescence. In the water medium calix[4]arene micelles interact with positively charged potential-sensitive fluorescent probe TMRM, that can testify to the presence of negative charge in these structures. However calix[4]arene micelles in DMF solution do not interact with TMRM. Mitochondrial membrane potential was measured using fluorescent dyes MTG and TMRM with confocal microscopy and fluorescent dye TMRM with flow cytometry. Experiments were conducted on myometrium cells in culture and on suspension of digitonin-permeabilized uterus myocytes. It was shown that a fluorescent signal was stable during time of experiment. Calix[4]arenes C-136 and C-137 (10 μM) hyperpolarize mitochondria membranes. A maximal effect was 173%. At the same time calix[4]arene C-138 did not influence on mitochondria membrane potential. Connection comes into question between structural organization of investigated calix[4]arene molecules and their influence on polarization of mitochondria membrane.
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Montague CR, Fitzmaurice A, Hover BM, Salazar NA, Fey JP. Screen for small molecules increasing the mitochondrial membrane potential. ACTA ACUST UNITED AC 2013; 19:387-98. [PMID: 23867716 DOI: 10.1177/1087057113495295] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The identification of small molecules that positively modulate the mitochondrial respiratory function has broad applications in fundamental research, therapeutic target validation, and drug discovery. We present an approach in which primary screens for mitochondrial function in yeast are used to efficiently identify a subset of high-value compounds that can in turn be rapidly tested against a broad range of mammalian cell lines. The ability of the yeast assay to successfully identify in a high-throughput format hit compounds that increase the mitochondrial membrane potential and adenosine triphosphate (ATP) levels by as little as 15% was demonstrated. In this study, 14 hits were identified from a collection of 13,680 compounds. Secondary testing with myotubes, fibroblasts, and PC-12 and HepG2 cells identified two compounds increasing ATP levels in hepatocytes and two other compounds increasing ATP in fibroblasts. The effect on hepatocytes was further studied using genomic and mitochondrial proteomic tools to characterize the changes induced by the two compounds. Changes in the accumulation of a series of factors involved in early gene response or apoptosis or linked to metabolic functions (i.e., β-Klotho, RORα, PGC-1α, G6PC, IGFBP1, FTL) were discovered.
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Hescot S, Slama A, Lombès A, Paci A, Remy H, Leboulleux S, Chadarevian R, Trabado S, Amazit L, Young J, Baudin E, Lombès M. Mitotane alters mitochondrial respiratory chain activity by inducing cytochrome c oxidase defect in human adrenocortical cells. Endocr Relat Cancer 2013; 20:371-81. [PMID: 23696597 DOI: 10.1530/erc-12-0368] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mitotane, 1,1-dichloro-2-(o-chlorophenyl)-2-(p-chlorophenyl)ethane is the most effective medical therapy for adrenocortical carcinoma, but its molecular mechanism of action remains poorly understood. Although mitotane is known to have mitochondrial (mt) effects, a direct link to mt dysfunction has never been established. We examined the functional consequences of mitotane exposure on proliferation, steroidogenesis, and mt respiratory chain, biogenesis and morphology, in two human adrenocortical cell lines, the steroid-secreting H295R line and the non-secreting SW13 line. Mitotane inhibited cell proliferation in a dose- and a time-dependent manner. At the concentration of 50 μM (14 mg/l), which corresponds to the threshold for therapeutic efficacy, mitotane drastically reduced cortisol and 17-hydroxyprogesterone secretions by 70%. This was accompanied by significant decreases in the expression of genes encoding mt proteins involved in steroidogenesis (STAR, CYP11B1, and CYP11B2). In both H295R and SW13 cells, 50 μM mitotane significantly inhibited (50%) the maximum velocity of the activity of the respiratory chain complex IV (cytochrome c oxidase (COX)). This effect was associated with a drastic reduction in steady-state levels of the whole COX complex as revealed by blue native PAGE and reduced mRNA expression of both mtDNA-encoded COX2 (MT-CO2) and nuclear DNA-encoded COX4 (COX4I1) subunits. In contrast, the activity and expression of respiratory chain complexes II and III were unaffected by mitotane treatment. Lastly, mitotane exposure enhanced mt biogenesis (increase in mtDNA content and PGC1α (PPARGC1A) expression) and triggered fragmentation of the mt network. Altogether, our results provide first evidence that mitotane induced a mt respiratory chain defect in human adrenocortical cells.
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Affiliation(s)
- Ségolène Hescot
- INSERM U693, Fac Med Paris Sud, Rue Gabriel Péri, Le Kremlin-Bicêtre F-94276, France
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Niewold TA. About hot chicks, a new acute mortality syndrome most likely caused by fatal hyperthermia as a consequence of mitochondrial uncoupling. Poult Sci 2013; 92:847-8. [PMID: 23472005 DOI: 10.3382/ps.2012-02965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Theo A Niewold
- Department of Biosystems, KU Leuven, Kasteelpark Arenberg 30, Heverlee, Belgium.
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Yamada Y, Nakamura K, Furukawa R, Kawamura E, Moriwaki T, Matsumoto K, Okuda K, Shindo M, Harashima H. Mitochondrial Delivery of Bongkrekic Acid Using a MITO-Porter Prevents the Induction of Apoptosis in Human HeLa Cells. J Pharm Sci 2013; 102:1008-15. [DOI: 10.1002/jps.23442] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 11/28/2012] [Accepted: 12/14/2012] [Indexed: 11/08/2022]
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Zhang Y, Cui Y, Zhu J, Li H, Mao J, Jin X, Wang X, Du Y, Lu J. The anti-tumor effect and biological activities of the extract JMM6 from the stem-barks of the Chinese Juglans mandshurica Maxim on human hepatoma cell line BEL-7402. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES 2012; 10:258-69. [PMID: 24146449 DOI: 10.4314/ajtcam.v10i2.10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Juglans mandshurica Maxim is a traditional herbal medicines in China, and its anti-tumor bioactivities are of research interest. Bioassay-guided fractionation method was employed to isolate anti-tumor compounds from the stem barks of the Juglans mandshurica Maxim. The anti-tumor effect and biological activities of the extracted compound JMM6 were studied in BEL-7402 cells by MTT, Cell cycle analysis, Hoechst 33342 staining, Annexin V-FITC/PI assay and Detection of mitochondrial membrane potential (ΔΨm). After treatment with the JMM6, the growth of BEL-7402 cells was inhibited and cells displayed typical morphological apoptotic characteristics. Further investigations revealed that treatment with JMM6 mainly caused G2/M cell cycle arrest and induced apoptosis in BEL-7402 cells. To evaluate the alteration of mitochondria in JMM6 induced apoptosis. The data showed that JMM6 decreased significantly the ΔΨm, causing the depolarization of the mitochondrial membrane. Our results show that the JMM6 will have a potential advantage of anti-tumor, less harmful to normal cells. This paper not only summarized the JMM6 pick-up technology from Juglans mandshurica Maxim and biological characteristic, but also may provide further evidence to exploit the potential medicine compounds from the stem-barks of the Chinese Juglans mandshurica Maxim.
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Affiliation(s)
- Yongli Zhang
- Department of Biology, School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou 510006, China
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Cicchillitti L, Di Stefano V, Isaia E, Crimaldi L, Fasanaro P, Ambrosino V, Antonini A, Capogrossi MC, Gaetano C, Piaggio G, Martelli F. Hypoxia-inducible factor 1-α induces miR-210 in normoxic differentiating myoblasts. J Biol Chem 2012; 287:44761-71. [PMID: 23148210 DOI: 10.1074/jbc.m112.421255] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
MicroRNA-210 (miR-210) induction is a virtually constant feature of the hypoxic response in both normal and transformed cells, regulating several key aspects of cardiovascular diseases and cancer. We found that miR-210 was induced in normoxic myoblasts upon myogenic differentiation both in vitro and in vivo. miR-210 transcription was activated in an hypoxia-inducible factor 1-α (Hif1a)-dependent manner, and chromatin immunoprecipitation experiments show that Hif1a bound to the miR-210 promoter only in differentiated myotubes. Accordingly, luciferase reporter assays demonstrated the functional relevance of the Hif1a binding site for miR-210 promoter activation in differentiating myoblasts. To investigate the functional relevance of increased miR-210 levels in differentiated myofibers, we blocked miR-210 with complementary locked nucleic acid oligonucleotides (anti-miR-210). We found that C2C12 myoblast cell line differentiation was largely unaffected by anti-miR-210. Likewise, miR-210 inhibition did not affect skeletal muscle regeneration following cardiotoxin damage. However, we found that miR-210 blockade greatly increased myotube sensitivity to oxidative stress and mitochondrial dysfunction. In conclusion, miR-210 is induced in normoxic myofibers, playing a cytoprotective role.
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Ansari RA, Rizvi SAA, Husain K, Lymperopoulos A, Berndt WO. Effect of sulfhydryl modification on rat kidney basolateral plasma membrane transport function. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2012; 89:699-703. [PMID: 22936015 DOI: 10.1007/s00128-012-0756-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/17/2012] [Indexed: 06/01/2023]
Abstract
Transport processes are the hallmark of functioning kidney. Various nephrotoxicants disrupt the transport processes to manifest nephrotoxicity. Of several nephrotoxicants, mercuric chloride (HgCl(2)) depletes the reduced glutathione (GSH) in kidney and has been observed to affect the in vitro p-aminohippurate (PAH) transport by basolateral (BL) membrane vesicles. The role of renal nonprotein sulfhydryls such as, reduced GSH has been demonstrated to affect the PAH transport by BL membrane vesicles. The role of protein sulfhydryls in transport process of PAH by BL membrane is not known. Due to mercury mediated effects on sulfhydryls, the effects of protein-sulfhydryls (-SH) modifying reagents in the current study were investigated on PAH transport by BL membrane. It was observed that modification of -SH by p-chloromercuribenzoate sulphate (pCMBS), and mercuric chloride (HgCl(2)) decreased while recovering the protein -SH with dithiothreitol treatment provided protection against the effects of pCMBS, and HgCl(2) on PAH transport by BL membrane vesicles.
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Affiliation(s)
- Rais A Ansari
- Department of Pharmaceutical Sciences, College of Pharmacy Health Professions Division, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328-2018, USA.
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Hroudová J, Fišar Z. In vitro inhibition of mitochondrial respiratory rate by antidepressants. Toxicol Lett 2012; 213:345-52. [PMID: 22842584 DOI: 10.1016/j.toxlet.2012.07.017] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 07/04/2012] [Accepted: 07/19/2012] [Indexed: 12/11/2022]
Abstract
Mitochondria represent a possible drug target with unexplored therapeutic and toxicological potential. The possibility was suggested that antidepressants, mood stabilizers and other drugs may show some therapeutic and/or toxic effects through their action on mitochondrial functions. There are no sufficient data about the effect of these drugs on mitochondrial respiration in the brain. We investigated the in vitro effects of amitriptyline, fluoxetine, tianeptine, ketamine, lithium, valproate, olanzapine, chlorpromazine and propranolol on mitochondrial respiration in crude mitochondrial fractions of pig brains. Respiration was energized using substrates of complex I or complex II and dose dependent drug-induced changes in mitochondrial respiratory rate were measured by high-resolution respirometry. Antidepressants, but not mood stabilizers, ketamine and propranolol were found to inhibit mitochondrial respiratory rate. The effective dose of antidepressants reaching half the maximal respiratory rate was in the range of 0.07-0.46 mmol/L. Partial inhibition was found for all inhibitors. Differences between individual drugs with similar physicochemical properties indicate selectivity of drug-induced changes in mitochondrial respiratory rate. Our findings suggest that mood stabilizers do not interfere with brain mitochondrial respiration, whereas direct mitochondrial targeting is involved in mechanisms of action of pharmacologically different antidepressants.
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Affiliation(s)
- Jana Hroudová
- Department of Psychiatry, Charles University in Prague and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague, Czech Republic
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