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Zhang Y, Gong J, Hu X, He L, Lin Y, Zhang J, Meng X, Zhang Y, Mo J, Day DB, Xiang J. Glycerophospholipid metabolism changes association with ozone exposure. JOURNAL OF HAZARDOUS MATERIALS 2024; 475:134870. [PMID: 38876019 DOI: 10.1016/j.jhazmat.2024.134870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/07/2024] [Accepted: 06/08/2024] [Indexed: 06/16/2024]
Abstract
Exposure to ozone (O3) has been associated with cardiovascular outcomes in humans, yet the underlying mechanisms of the adverse effect remain poorly understood. We aimed to investigate the association between O3 exposure and glycerophospholipid metabolism in healthy young adults. We quantified plasma concentrations of phosphatidylcholines (PCs) and lysophosphatidylcholines (lysoPCs) using a UPLC-MS/MS system. Time-weighted personal exposures were calculated to O3 and co-pollutants over 4 time windows, and we employed orthogonal partial least squares discriminant analysis to discern differences in lipids profiles between high and low O3 exposure. Linear mixed-effects models and mediation analysis were utilized to estimate the associations between O3 exposure, lipids, and cardiovascular physiology indicators. Forty-three healthy adults were included in this study, and the mean (SD) time-weighted personal exposures to O3 was 9.08 (4.06) ppb. With shorter exposure durations, O3 increases were associated with increasing PC and lysoPC levels; whereas at longer exposure times, the opposite relationship was shown. Furthermore, two specific lipids, namely lysoPC a C26:0 and lysoPC a C17:0, showed significantly positive mediating effects on associations of long-term O3 exposure with pulse wave velocity and systolic blood pressure, respectively. Alterations in specific lipids may underlie the cardiovascular effects of O3 exposure.
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Affiliation(s)
- Yi Zhang
- SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Jicheng Gong
- SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China.
| | - Xinyan Hu
- SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Linchen He
- College of Health, Lehigh University, Bethlehem, PA 19019, United States; Global Health Institute, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States
| | - Yan Lin
- Global Health Institute, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States
| | - Junfeng Zhang
- Global Health Institute, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States
| | - Xin Meng
- SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Yinping Zhang
- Department of Building Science, Tsinghua University, Beijing 100084, China
| | - Jinhan Mo
- College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Drew B Day
- Seattle Children's Research Institute, Seattle, WA 98121, United States
| | - Jianbang Xiang
- School of Public Health, Sun Yat-Sen University, Shenzhen 518107, China
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Jiang J, Tang Y, Cao Z, Zhou C, Yu Z. Effects of hypo-osmotic stress on osmoregulation, antioxidant response, and energy metabolism in sea cucumber Holothuria moebii under desalination environment. ENVIRONMENTAL RESEARCH 2024; 252:118800. [PMID: 38555088 DOI: 10.1016/j.envres.2024.118800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/15/2024] [Accepted: 03/25/2024] [Indexed: 04/02/2024]
Abstract
With global climate changing, hypo-salinity events are increasing in frequency and duration because of continuous rainfall and freshwater inflow, which causes reduced cytosolic osmolarity and cellular stress responses in aquatic animals. Sea cucumbers are considered stenohaline because they lack osmoregulatory organs and are vulnerable to salinity fluctuations. In this study, we performed multiple biochemical assays, de novo transcriptomics, and widely targeted metabolomics to comprehensively explore the osmoregulatory mechanisms and physiological responses of sea cucumber Holothuria moebii to hypo-osmotic stress, which is a representative specie that is frequently exposed to hypo-saline intertidal zones. Our results found that H. moebii contracted their ambulacral feet and oral tentacles, and the coelomic fluid ion concentrations were reduced to be consistent with the environment. The microvilli of intestines and respiratory trees underwent degeneration, and the cytoplasm exhibited swelling and vacuolation. Moreover, the Na+, K+, and Cl- concentrations and Na+/K+-ATPase activity were significantly reduced under hypo-osmotic stress. The decrease in protein kinase A activity and increase in 5'-AMP level indicated a significant inhibition of the cAMP signaling pathway to regulate ion concentrations. And small intracellular organic molecules (amino acids, nucleotides and their derivatives) also play crucial roles in osmoregulation through oxidative deamination of glutamate, nucleotide catabolism, and nucleic acid synthesis. Moreover, lysosomes and peroxisomes removed oxidative damage, whereas antioxidant metabolites, such as N-acetyl amino acids and glutathione, were increased to resist oxidative stress. With prolonged hypo-osmotic stress, glycerophospholipid metabolism was enhanced to maintain membrane stability. Furthermore, acyl-CoA-binding protein activity was significantly inhibited, and only a small amount of acylcarnitine was significantly accumulated, which indicated a disruption in energy metabolism. PPAR signaling pathway and choline content were up-regulated to promote fatty acid metabolism under hypo-osmotic stress. Overall, our results provide new insights into the osmoregulatory mechanisms and physiological responses of sea cucumbers to hypo-osmotic stress.
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Affiliation(s)
- Junyang Jiang
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Yanna Tang
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Zhaozhao Cao
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Cong Zhou
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.
| | - Zonghe Yu
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China.
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Bhetraratana M, Orozco LD, Bennett BJ, Luna K, Yang X, Lusis AJ, Araujo JA. Diesel exhaust particle extract elicits an oxPAPC-like transcriptomic profile in macrophages across multiple mouse strains. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 358:124415. [PMID: 38908672 DOI: 10.1016/j.envpol.2024.124415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 06/14/2024] [Accepted: 06/19/2024] [Indexed: 06/24/2024]
Abstract
Air pollution is a prominent cause of cardiopulmonary illness, but uncertainties remain regarding the mechanisms mediating those effects as well as individual susceptibility. Macrophages are highly responsive to particles, and we hypothesized that their responses would be dependent on their genetic backgrounds. We conducted a genome-wide analysis of peritoneal macrophages harvested from 24 inbred strains of mice from the Hybrid Mouse Diversity Panel (HMDP). Cells were treated with a DEP methanol extract (DEPe) to elucidate potential pathways that mediate acute responses to air pollution exposures. This analysis showed that 1247 genes were upregulated and 1383 genes were downregulated with DEPe treatment across strains. Pathway analysis identified oxidative stress responses among the most prominent upregulated pathways; indeed, many of the upregulated genes included antioxidants such as Hmox1, Txnrd1, Srxn1, and Gclm, with NRF2 (official gene symbol: Nfe2l2) being the most significant driver. DEPe induced a Mox-like transcriptomic profile, a macrophage subtype typically induced by oxidized phospholipids and likely dependent on NRF2 expression. Analysis of individual strains revealed consistency of overall responses to DEPe and yet differences in the degree of Mox-like polarization across the various strains, indicating DEPe × genetic interactions. These results suggest a role for macrophage polarization in the cardiopulmonary toxicity induced by air pollution.
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Affiliation(s)
- May Bhetraratana
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA
| | - Luz D Orozco
- Department of Human Genetics, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA
| | - Brian J Bennett
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA
| | - Karla Luna
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA; Department of Biology, College of Science and Math, California State University-Northridge, 18111 Nordhoff Street, Northridge, CA, 91330, USA
| | - Xia Yang
- Department of Integrative Biology and Physiology, UCLA, 612 Charles E. Young Drive East, Los Angeles, CA, 90095, USA; Institute for Quantitative and Computational Biosciences, UCLA, 610 Charles E. Young Drive East, Los Angeles, CA, 90095, USA; Molecular Biology Institute, UCLA, 611 Charles E. Young Drive East, Los Angeles, CA, 90095, USA
| | - Aldons J Lusis
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA; Department of Human Genetics, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA; Molecular Biology Institute, UCLA, 611 Charles E. Young Drive East, Los Angeles, CA, 90095, USA
| | - Jesus A Araujo
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Ave., Los Angeles, CA, 90095, USA; Molecular Biology Institute, UCLA, 611 Charles E. Young Drive East, Los Angeles, CA, 90095, USA; Department of Environmental Health Sciences, Fielding School of Public Health, UCLA, 650 Charles E. Young Dr. South, Los Angeles, CA, 90095, USA.
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Thal DR, Gawor K, Moonen S. Regulated cell death and its role in Alzheimer's disease and amyotrophic lateral sclerosis. Acta Neuropathol 2024; 147:69. [PMID: 38583129 DOI: 10.1007/s00401-024-02722-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 03/13/2024] [Accepted: 03/19/2024] [Indexed: 04/08/2024]
Abstract
Despite considerable research efforts, it is still not clear which mechanisms underlie neuronal cell death in neurodegenerative diseases. During the last 20 years, multiple pathways have been identified that can execute regulated cell death (RCD). Among these RCD pathways, apoptosis, necroptosis, pyroptosis, ferroptosis, autophagy-related cell death, and lysosome-dependent cell death have been intensively investigated. Although RCD consists of numerous individual pathways, multiple common proteins have been identified that allow shifting from one cell death pathway to another. Another layer of complexity is added by mechanisms such as the endosomal machinery, able to regulate the activation of some RCD pathways, preventing cell death. In addition, restricted axonal degeneration and synaptic pruning can occur as a result of RCD activation without loss of the cell body. RCD plays a complex role in neurodegenerative processes, varying across different disorders. It has been shown that RCD is differentially involved in Alzheimer's disease (AD) and amyotrophic lateral sclerosis (ALS), among the most common neurodegenerative diseases. In AD, neuronal loss is associated with the activation of not only necroptosis, but also pyroptosis. In ALS, on the other hand, motor neuron death is not linked to canonical necroptosis, whereas pyroptosis pathway activation is seen in white matter microglia. Despite these differences in the activation of RCD pathways in AD and ALS, the accumulation of protein aggregates immunoreactive for p62/SQSTM1 (sequestosome 1) is a common event in both diseases and many other neurodegenerative disorders. In this review, we describe the major RCD pathways with clear activation in AD and ALS, the main interactions between these pathways, as well as their differential and similar involvement in these disorders. Finally, we will discuss targeting RCD as an innovative therapeutic concept for neurodegenerative diseases, such as AD and ALS. Considering that the execution of RCD or "cellular suicide" represents the final stage in neurodegeneration, it seems crucial to prevent neuronal death in patients by targeting RCD. This would offer valuable time to address upstream events in the pathological cascade by keeping the neurons alive.
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Affiliation(s)
- Dietmar Rudolf Thal
- Laboratory for Neuropathology, Department of Imaging and Pathology and Leuven Brain Institute (LBI), KU-Leuven, Herestraat 49, 3000, Leuven, Belgium.
- Department of Pathology, University Hospitals Leuven, Leuven, Belgium.
| | - Klara Gawor
- Laboratory for Neuropathology, Department of Imaging and Pathology and Leuven Brain Institute (LBI), KU-Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Sebastiaan Moonen
- Laboratory for Neuropathology, Department of Imaging and Pathology and Leuven Brain Institute (LBI), KU-Leuven, Herestraat 49, 3000, Leuven, Belgium
- Laboratory for the Research of Neurodegenerative Diseases, Department of Neurosciences, KU Leuven, Leuven Brain Institute (LBI), Leuven, Belgium
- Center for Brain & Disease Research, VIB, Leuven, Belgium
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5
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Far from being a simple question: The complexity between in vitro and in vivo responses from nutrients and bioactive compounds with antioxidant potential. Food Chem 2023; 402:134351. [DOI: 10.1016/j.foodchem.2022.134351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 09/13/2022] [Accepted: 09/17/2022] [Indexed: 11/18/2022]
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Cheng Y, Zhang H, Zhu W, Li Q, Meng R, Yang K, Guo Z, Zhai Y, Zhang H, Ji R, Peng H, Dou D, Jing M. Ferroptosis induced by the biocontrol agent Pythium oligandrum enhances soybean resistance to Phytophthora sojae. Environ Microbiol 2022; 24:6267-6278. [PMID: 36250814 DOI: 10.1111/1462-2920.16248] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 10/13/2022] [Indexed: 01/12/2023]
Abstract
Ferroptosis is a newly discovered form of cell death accompanied by iron accumulation and lipid peroxidation. Both biotic and abiotic stresses can induce ferroptosis in plant cells. In the case of plant interactions with pathogenic Phytophthora oomycetes, the roles of ferroptosis are still largely unknown. Here, we performed transcriptome analysis on soybean plants treated with the biocontrol agent Pythium oligandrum, a soilborne and non-pathogenic oomycete capable of inducing plant resistance against Phytophthora sojae infection. Expression of homologous soybean genes involved in ferroptosis and resistance was reprogrammed upon P. oligandrum treatment. Typical hallmarks for characterizing ferroptosis were detected in soybean hypocotyl cells, including decreased glutathione (GSH) level, accumulation of ferric ions, and lipid peroxidation by reactive oxygen species (ROS). Meanwhile, ferroptosis-like cell death was triggered by P. oligandrum to suppress P. sojae infection in soybean. Protection provided by P. oligandrum could be attenuated by the ferroptosis inhibitor ferrostatin-1 (Fer-1), suggesting the critical role of ferroptosis in soybean resistance against P. sojae. Taken together, these results demonstrate that ferroptosis is a P. oligandrum-inducible defence mechanism against oomycete infection in soybean.
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Affiliation(s)
- Yang Cheng
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Huanxin Zhang
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Wenyi Zhu
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Qing Li
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Rui Meng
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Kun Yang
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Ziqian Guo
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Ying Zhai
- Department of Plant Pathology, Washington State University, Pullman, Washington, USA
| | - Haijing Zhang
- Rongcheng Agricultural and Rural Services Centre, Weihai, China
| | - Rui Ji
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Hao Peng
- Department of Plant Pathology, Washington State University, Pullman, Washington, USA
| | - Daolong Dou
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Maofeng Jing
- Key Laboratory of Biological Interaction and Crop Health, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
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Jin R, Baumgart T. Asymmetric desorption of lipid oxidation products induces membrane bending. SOFT MATTER 2021; 17:7506-7515. [PMID: 34338699 PMCID: PMC8425771 DOI: 10.1039/d1sm00652e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipid oxidation, detected in metabolic processes, is induced in excess when the cellular membrane suffers extra oxidative stress. Lipid oxidation can compromise biomembrane function in part through perturbations of lipid packing, membrane permeability, and morphology. Two major types of oxidation products, one with a partially truncated lipid tail with a hydrophilic group at the tail-end, and secondly, a lysolipid (with one of the chains completely truncated) can disturb the membrane bilayer packing significantly. However, they also have an increased tendency to desorb from the membrane. In this study we investigated desorption kinetics of two characteristic lipid oxidation products (PAzePC and 18 : 1 LysoPC) from a model membrane system, and we evaluated the consequences of this process on membrane shape transitions. Using a microfluidic chamber coupled with micropipette aspiration, we observed the incorporation of the two lipids into the membrane of a giant unilamellar vesicle (GUV) and further determined their desorption rates, association rates and flip-flop rates. For both lipids, the desorption is on the time scale of seconds, one to two orders of magnitude faster than their flipping rates. Dilution of the outer solution of the GUVs allowed asymmetric desorption of these two lipids from the GUVs. This process induced lipid number asymmetry and charge asymmetry, specifically for PAzePC containing GUVs, and caused membrane tubulation. Our results indicate that the desorption of lipid oxidation products can alter the local structure of biomembranes and result in morphological changes that may relate to membrane function.
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Affiliation(s)
- Rui Jin
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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Ferroptosis in Different Pathological Contexts Seen through the Eyes of Mitochondria. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5537330. [PMID: 34211625 PMCID: PMC8205588 DOI: 10.1155/2021/5537330] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 05/08/2021] [Accepted: 05/25/2021] [Indexed: 12/12/2022]
Abstract
Ferroptosis is a recently described form of regulated cell death characterized by intracellular iron accumulation and severe lipid peroxidation due to an impaired cysteine-glutathione-glutathione peroxidase 4 antioxidant defence axis. One of the hallmarks of ferroptosis is a specific morphological phenotype characterized by extensive ultrastructural changes of mitochondria. Increasing evidence suggests that mitochondria play a significant role in the induction and execution of ferroptosis. The present review summarizes existing knowledge about the mitochondrial impact on ferroptosis in different pathological states, primarily cancer, cardiovascular diseases, and neurodegenerative diseases. Additionally, we highlight pathologies in which the ferroptosis/mitochondria relation remains to be investigated, where the process of ferroptosis has been confirmed (such as liver- and kidney-related pathologies) and those in which ferroptosis has not been studied yet, such as diabetes. We will bring attention to avenues that could be followed in future research, based on the use of mitochondria-targeted approaches as anti- and proferroptotic strategies and directed to the improvement of existing and the development of novel therapeutic strategies.
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Dias IHK, Milic I, Heiss C, Ademowo OS, Polidori MC, Devitt A, Griffiths HR. Inflammation, Lipid (Per)oxidation, and Redox Regulation. Antioxid Redox Signal 2020; 33:166-190. [PMID: 31989835 DOI: 10.1089/ars.2020.8022] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Significance: Inflammation increases during the aging process. It is linked to mitochondrial dysfunction and increased reactive oxygen species (ROS) production. Mitochondrial macromolecules are critical targets of oxidative damage; they contribute to respiratory uncoupling with increased ROS production, redox stress, and a cycle of senescence, cytokine production, and impaired oxidative phosphorylation. Targeting the formation or accumulation of oxidized biomolecules, particularly oxidized lipids, in immune cells and mitochondria could be beneficial for age-related inflammation and comorbidities. Recent Advances: Inflammation is central to age-related decline in health and exhibits a complex relationship with mitochondrial redox state and metabolic function. Improvements in mass spectrometric methods have led to the identification of families of oxidized phospholipids (OxPLs), cholesterols, and fatty acids that increase during inflammation and which modulate nuclear factor erythroid 2-related factor 2 (Nrf2), peroxisome proliferator-activated receptor gamma (PPARγ), activator protein 1 (AP1), and NF-κB redox-sensitive transcription factor activity. Critical Issues: The kinetic and spatial resolution of the modified lipidome has profound and sometimes opposing effects on inflammation, promoting initiation at high concentration and resolution at low concentration of OxPLs. Future Directions: There is an emerging opportunity to prevent or delay age-related inflammation and vascular comorbidity through a resolving (oxy)lipidome that is dependent on improving mitochondrial quality control and restoring redox homeostasis.
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Affiliation(s)
- Irundika H K Dias
- Aston Medical Research Institute, Aston Medical School, Aston University, Birmingham, United Kingdom
| | - Ivana Milic
- Aston Research Center for Healthy Ageing, School of Life and Health Sciences, Aston University, Birmingham, United Kingdom
| | - Christian Heiss
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Opeyemi S Ademowo
- Aston Research Center for Healthy Ageing, School of Life and Health Sciences, Aston University, Birmingham, United Kingdom
| | - Maria Cristina Polidori
- Ageing Clinical Research, Department II of Internal Medicine and Cologne Center for Molecular Medicine Cologne, and CECAD, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Andrew Devitt
- Aston Research Center for Healthy Ageing, School of Life and Health Sciences, Aston University, Birmingham, United Kingdom
| | - Helen R Griffiths
- Aston Medical Research Institute, Aston Medical School, Aston University, Birmingham, United Kingdom.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
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Liu X, Sims HF, Jenkins CM, Guan S, Dilthey BG, Gross RW. 12-LOX catalyzes the oxidation of 2-arachidonoyl-lysolipids in platelets generating eicosanoid-lysolipids that are attenuated by iPLA 2γ knockout. J Biol Chem 2020; 295:5307-5320. [PMID: 32161117 PMCID: PMC7170522 DOI: 10.1074/jbc.ra119.012296] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 03/04/2020] [Indexed: 12/13/2022] Open
Abstract
The canonical pathway of eicosanoid production in most mammalian cells is initiated by phospholipase A2-mediated release of arachidonic acid, followed by its enzymatic oxidation resulting in a vast array of eicosanoid products. However, recent work has demonstrated that the major phospholipase in mitochondria, iPLA2γ (patatin-like phospholipase domain containing 8 (PNPLA8)), possesses sn-1 specificity, with polyunsaturated fatty acids at the sn-2 position generating polyunsaturated sn-2-acyl lysophospholipids. Through strategic chemical derivatization, chiral chromatographic separation, and multistage tandem MS, here we first demonstrate that human platelet-type 12-lipoxygenase (12-LOX) can directly catalyze the regioselective and stereospecific oxidation of 2-arachidonoyl-lysophosphatidylcholine (2-AA-LPC) and 2-arachidonoyl-lysophosphatidylethanolamine (2-AA-LPE). Next, we identified these two eicosanoid-lysophospholipids in murine myocardium and in isolated platelets. Moreover, we observed robust increases in 2-AA-LPC, 2-AA-LPE, and their downstream 12-LOX oxidation products, 12(S)-HETE-LPC and 12(S)-HETE-LPE, in calcium ionophore (A23187)-stimulated murine platelets. Mechanistically, genetic ablation of iPLA2γ markedly decreased the calcium-stimulated production of 2-AA-LPC, 2-AA-LPE, and 12-HETE-lysophospholipids in mouse platelets. Importantly, a potent and selective 12-LOX inhibitor, ML355, significantly inhibited the production of 12-HETE-LPC and 12-HETE-LPE in activated platelets. Furthermore, we found that aging is accompanied by significant changes in 12-HETE-LPC in murine serum that were also markedly attenuated by iPLA2γ genetic ablation. Collectively, these results identify previously unknown iPLA2γ-initiated signaling pathways mediated by direct 12-LOX oxidation of 2-AA-LPC and 2-AA-LPE. This oxidation generates previously unrecognized eicosanoid-lysophospholipids that may serve as biomarkers for age-related diseases and could potentially be used as targets in therapeutic interventions.
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Affiliation(s)
- Xinping Liu
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110
| | - Harold F Sims
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110
| | - Christopher M Jenkins
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110
| | - Shaoping Guan
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110
| | - Beverly G Dilthey
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110
| | - Richard W Gross
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110; Department of Developmental Biology, Washington University School of Medicine, Saint Louis, Missouri 63110; Department of Chemistry, Washington University, Saint Louis, Missouri 63130.
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11
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Sihali-Beloui O, Aroune D, Benazouz F, Hadji A, El-Aoufi S, Marco S. A hypercaloric diet induces hepatic oxidative stress, infiltration of lymphocytes, and mitochondrial reshuffle in Psammomys obesus, a murine model of insulin resistance. C R Biol 2019; 342:209-219. [PMID: 31151779 DOI: 10.1016/j.crvi.2019.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 04/04/2019] [Accepted: 04/21/2019] [Indexed: 02/07/2023]
Abstract
The aim of this study was to show, for the first time, the effect of a hypercaloric diet on the mitochondrial reshuffle of hepatocytes during the progression from steatosis to steatohepatitis to cirrhosis in Psammomys obesus, a typical animal model of the metabolic syndrome. Metabolic and oxidative stresses were induced by feeding the animal through a standard laboratory diet (SD) for nine months. Metabolic parameters, liver malondialdehyde (MDA) and glutathione (GSH), were evaluated. The pathological evolution was examined by histopathology and immunohistochemistry, using CD3 and CD20 antibodies. The dynamics of the mitochondrial structure was followed by transmission electron microscopy. SD induced a steatosis in this animal that evolved under the effect of oxidative and metabolic stress by the appearance of adaptive inflammation and fibrosis leading the animal to the cirrhosis stage with serious hepatocyte damage by the triggering, at first the mitochondrial fusion-fission cycles, which attempted to maintain the mitochondria intact and functional, but the hepatocellular oxidative damage was increased inducing a vicious circle of mitochondrial alteration and dysfunction and their elimination by mitophagy. P. obesus is an excellent animal model of therapeutic research that targets mitochondrial dysfunction in the progression of steatosis.
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Affiliation(s)
- Ouahiba Sihali-Beloui
- Laboratory of Biology and Physiology of Organisms/Molecular Modelling Endothlial Dysfunction and Diabetes, Faculty of Biological Sciences, University of Science and Technology Houari Boumediene (USTHB), P.O. Box 32, El Alia, Dar El Beida, 16111 Alger, Algeria.
| | - Djamila Aroune
- Laboratory of Biology and Physiology of Organisms/Molecular Modelling Endothlial Dysfunction and Diabetes, Faculty of Biological Sciences, University of Science and Technology Houari Boumediene (USTHB), P.O. Box 32, El Alia, Dar El Beida, 16111 Alger, Algeria
| | - Fella Benazouz
- Laboratory of Biology and Physiology of Organisms/Molecular Modelling Endothlial Dysfunction and Diabetes, Faculty of Biological Sciences, University of Science and Technology Houari Boumediene (USTHB), P.O. Box 32, El Alia, Dar El Beida, 16111 Alger, Algeria
| | - Adile Hadji
- Pathological Anatomy and Cytology Service, Djillali Bounaama Hospital, Douera-Alger, Algeria
| | - Salima El-Aoufi
- Laboratory of Biology and Physiology of Organisms/Molecular Modelling Endothlial Dysfunction and Diabetes, Faculty of Biological Sciences, University of Science and Technology Houari Boumediene (USTHB), P.O. Box 32, El Alia, Dar El Beida, 16111 Alger, Algeria
| | - Sergio Marco
- Institut Curie, Centre de recherche, 91405 Orsay, France; INSERM, U1196, 91405 Orsay, France; CNRS, UMR9187, 91405 Orsay, France; Université Paris-Sud, Université Paris-Saclay, 91190 Saint-Auban, France
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12
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Kang J, Che Y, Yan N, Cao D. Evaluation system construction and factor impact analysis of silica-gel adsorption to extract phytosterol glycosides from soybean lecithin powder. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:4287-4295. [PMID: 30828812 DOI: 10.1002/jsfa.9661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/16/2019] [Accepted: 02/24/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Soybean lecithin powders are good sources of phytosterol glucosides (PGs) containing acyl-sterylglycosides (ASGs) and sterylglucosides (SGs), but PG extraction from soybean lecithin powder is difficult due to the solubilizing property of phospolipids. To comprehensively utilize soybean lecithin resources, an evaluation system construction and factor impact analysis of PG extraction by silica-gel adsorption was investigated in this article. RESULTS With high-performance liquid chromatography (HPLC) as the main experimental analysis method, software such as SIMICA and SPSS were applied to construct an evaluation system of PG extraction. Different from scores plot in SIMICA for distinguishing samples in chloroform from others, the loading plot and binary variant correlation analysis of all indicators in PG extraction were brought to confirm four evaluation indicators containing PG purity, ASG recovery, SG recovery and phospholipid recovery. In the factor impact analysis, four times elution from silica-gel sediment was enough to achieve a PG product with least reagent waste, while SPW in petroleum ether at 50 mg mL-1 with 1:3 silica-gel dosage (lecithin/silica-gel, w/w) was then determined as the optimum of single factors. CONCLUSION All studies in this article were of great significance, as they laid foundations for research of PG extraction procedure, as well as PG industrial production, facilitating the comprehensive utilization of lecithin resources. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Jingjing Kang
- Oil and Plant Protein Center, National Engineering Laboratory for Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
| | - Yubo Che
- Oil and Plant Protein Center, National Engineering Laboratory for Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
| | - Nan Yan
- Oil and Plant Protein Center, National Engineering Laboratory for Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
| | - Dong Cao
- Oil and Plant Protein Center, National Engineering Laboratory for Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
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13
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Ke Y, Karki P, Kim J, Son S, Berdyshev E, Bochkov VN, Birukova AA, Birukov KG. Elevated truncated oxidized phospholipids as a factor exacerbating ALI in the aging lungs. FASEB J 2019; 33:3887-3900. [PMID: 30521374 PMCID: PMC6404557 DOI: 10.1096/fj.201800981r] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 11/05/2018] [Indexed: 12/15/2022]
Abstract
As mechanisms controlling redox homeostasis become impaired with aging, exaggerated oxidant stress may cause disproportional oxidation of cell membranes and circulating phospholipids (PLs), leading to the formation of truncated oxidized PL products (Tr-OxPLs), which exhibit deleterious effects. This study investigated the role of elevated Tr-OxPLs as a factor exacerbating inflammation and lung barrier dysfunction in an animal model of aging. Mass spectrometry analysis of Tr-OxPL species in young (2-4 mo) and aging (18-24 mo) mice revealed elevated basal levels of several products [1-palmitoyl-2-(5-oxovaleroyl)- sn-glycero-phosphocholine (POVPC), 1-palmitoyl-2-glutaroyl- sn-glycero-phosphocholine, lysophosphocholine, 1-palmitoyl-2-(9-oxo-nonanoyl)- sn-glycero-3-phosphocholine, 1-palmitoyl-2-azelaoyl- sn-glycero-3-phosphocholine, O-1-O-palmitoyl-2-O-(5,8-dioxo-8-hydroxy-6-octenoyl)-l-glycero-3-phosphocholine, and others] in the aged lungs. An intratracheal (i.t.) injection of bacterial LPS caused increased generation of Tr-OxPLs in the lungs but not in the liver, with higher levels detected in the aged group. In addition, OxPLs clearance from the lung tissue after LPS challenge was delayed in the aged group. The impact of Tr-OxPLs on endothelial cell (EC) barrier compromise under inflammatory conditions was further evaluated in the 2-hit cell culture model of acute lung injury (ALI). EC barrier dysfunction caused by cell treatment with a cytokine mixture (CM) was augmented by cotreatment with low-dose Tr-OxPLs, which did not significantly affect endothelial function when added alone. Deleterious effects of Tr-OxPLs on inflamed ECs stimulated with CM were associated with further weakening of cell junctions and more robust EC hyperpermeability. Aged mice injected intratracheally with TNF-α exhibited a more pronounced elevation of cell counts and protein content in bronchoalveolar lavage (BAL) samples. Interestingly, intravenous administration of low POVPC doses-which did not affect BAL parameters alone in young mice exposed to i.t. TNF-α challenge-augmented lung injury to the levels observed in aged mice stimulated with TNF-α alone. Inhibition of Tr-OxPL generation by ectopic expression of PL-specific platelet-activating factor acetylhydrolase 2 (PAFAH2) markedly reduced EC dysfunction induced by CM, whereas PAFAH2 pharmacologic inhibition augmented deleterious effects of cytokines on EC barrier function. Moreover, exacerbating effects of PAFAH2 inhibition on TNF-α-induced lung injury were observed in vivo. These results demonstrate an age-dependent increase in Tr-OxPL production under basal conditions and augmented Tr-OxPL generation upon inflammatory stimulation, suggesting a major role for elevated Tr-OxPLs in more severe ALI and delayed resolution in aging lungs.-Ke, Y., Karki, P., Kim, J., Son, S., Berdyshev, E., Bochkov, V. N., Birukova, A. A., Birukov, K. G. Elevated truncated oxidized phospholipids as a factor exacerbating ALI in the aging lungs.
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Affiliation(s)
- Yunbo Ke
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Junghyun Kim
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Sophia Son
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | | | - Valery N. Bochkov
- Department of Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Anna A. Birukova
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Konstantin G. Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
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14
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Abstract
Ferroptosis is a cell death process driven by damage to cell membranes and linked to numerous human diseases. Ferroptosis is caused by loss of activity of the key enzyme that is tasked with repairing oxidative damage to cell membranes—glutathione peroxidase 4 (GPX4). GPX4 normally removes the dangerous products of iron-dependent lipid peroxidation, protecting cell membranes from this type of damage; when GPX4 fails, ferroptosis ensues. Ferroptosis is distinct from apoptosis, necroptosis, necrosis, and other modes of cell death. Several key mysteries regarding how cells die during ferroptosis remain unsolved. First, the drivers of lipid peroxidation are not yet clear. Second, the subcellular location of lethal lipid peroxides remains an outstanding question. Finally, how exactly lipid peroxidation leads to cell death is an unsolved mystery. Answers to these questions will provide insights into the mechanisms of ferroptotic cell death and associated human diseases, as well as new therapeutic strategies for such diseases.
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15
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Jenkins CM, Yang K, Liu G, Moon SH, Dilthey BG, Gross RW. Cytochrome c is an oxidative stress-activated plasmalogenase that cleaves plasmenylcholine and plasmenylethanolamine at the sn-1 vinyl ether linkage. J Biol Chem 2018. [PMID: 29530984 DOI: 10.1074/jbc.ra117.001629] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Plasmalogens are phospholipids critical for cell function and signaling that contain a vinyl ether linkage at the sn-1 position and are highly enriched in arachidonic acid (AA) at the sn-2 position. However, the enzyme(s) responsible for the cleavage of the vinyl ether linkage in plasmalogens has remained elusive. Herein, we report that cytochrome c, in the presence of either cardiolipin (CL), O2 and H2O2, or oxidized CL and O2, catalyzes the oxidation of the plasmalogen vinyl ether linkage, promoting its hydrolytic cleavage and resultant production of 2-AA-lysolipids and highly reactive α-hydroxy fatty aldehydes. Using stable isotope labeling in synergy with strategic chemical derivatizations and high-mass-accuracy MS, we deduced the chemical mechanism underlying this long sought-after reaction. Specifically, labeling with either 18O2 or H218O, but not with H218O2, resulted in M + 2 isotopologues of the α-hydroxyaldehyde, whereas reactions with both 18O2 and H218O identified the M + 4 isotopologue. Furthermore, incorporation of 18O from 18O2 was predominantly located at the α-carbon. In contrast, reactions with H218O yielded 18O linked to the aldehyde carbon. Importantly, no significant labeling of 2-AA-lysolipids with 18O2, H218O, or H218O2 was present. Intriguingly, phosphatidylinositol phosphates (PIP2 and PIP3) effectively substituted for cardiolipin. Moreover, cytochrome c released from myocardial mitochondria subjected to oxidative stress cleaved plasmenylcholine in membrane bilayers, and this was blocked with a specific mAb against cytochrome c Collectively, these results identify the first plasmalogenase in biology, reveal the production of previously unanticipated signaling lipids by cytochrome c, and present new perspectives on cellular signaling during oxidative stress.
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Affiliation(s)
- Christopher M Jenkins
- From the Division of Bioorganic Chemistry and Molecular Pharmacology and.,Departments of Medicine and
| | - Kui Yang
- From the Division of Bioorganic Chemistry and Molecular Pharmacology and
| | - Gaoyuan Liu
- From the Division of Bioorganic Chemistry and Molecular Pharmacology and.,Departments of Medicine and.,the Department of Chemistry, Washington University, St. Louis, Missouri 63130
| | - Sung Ho Moon
- From the Division of Bioorganic Chemistry and Molecular Pharmacology and.,Departments of Medicine and
| | - Beverly G Dilthey
- From the Division of Bioorganic Chemistry and Molecular Pharmacology and.,Departments of Medicine and
| | - Richard W Gross
- From the Division of Bioorganic Chemistry and Molecular Pharmacology and .,Departments of Medicine and.,the Department of Chemistry, Washington University, St. Louis, Missouri 63130.,Developmental Biology, Washington University School of Medicine, St. Louis, Missouri 63110 and
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16
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Ademowo OS, Dias HKI, Burton DGA, Griffiths HR. Lipid (per) oxidation in mitochondria: an emerging target in the ageing process? Biogerontology 2017; 18:859-879. [PMID: 28540446 PMCID: PMC5684309 DOI: 10.1007/s10522-017-9710-z] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/09/2017] [Indexed: 12/11/2022]
Abstract
Lipids are essential for physiological processes such as maintaining membrane integrity, providing a source of energy and acting as signalling molecules to control processes including cell proliferation, metabolism, inflammation and apoptosis. Disruption of lipid homeostasis can promote pathological changes that contribute towards biological ageing and age-related diseases. Several age-related diseases have been associated with altered lipid metabolism and an elevation in highly damaging lipid peroxidation products; the latter has been ascribed, at least in part, to mitochondrial dysfunction and elevated ROS formation. In addition, senescent cells, which are known to contribute significantly to age-related pathologies, are also associated with impaired mitochondrial function and changes in lipid metabolism. Therapeutic targeting of dysfunctional mitochondrial and pathological lipid metabolism is an emerging strategy for alleviating their negative impact during ageing and the progression to age-related diseases. Such therapies could include the use of drugs that prevent mitochondrial uncoupling, inhibit inflammatory lipid synthesis, modulate lipid transport or storage, reduce mitochondrial oxidative stress and eliminate senescent cells from tissues. In this review, we provide an overview of lipid structure and function, with emphasis on mitochondrial lipids and their potential for therapeutic targeting during ageing and age-related disease.
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Affiliation(s)
- O S Ademowo
- Life & Health Sciences, Aston University, Birmingham, UK
| | - H K I Dias
- Life & Health Sciences, Aston University, Birmingham, UK
| | - D G A Burton
- Life & Health Sciences, Aston University, Birmingham, UK
| | - H R Griffiths
- Life & Health Sciences, Aston University, Birmingham, UK.
- Health and Medical Sciences, University of Surrey, Guildford, UK.
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17
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Abstract
Lipid mediators play a critical role in the development and resolution of vascular endothelial barrier dysfunction caused by various pathologic interventions. The accumulation of excess lipids directly impairs endothelial cell (EC) barrier function that is known to contribute to the development of atherosclerosis and metabolic disorders such as obesity and diabetes as well as chronic inflammation in the vascular endothelium. Certain products of phospholipid oxidation (OxPL) such as fragmented phospholipids generated during oxidative and nitrosative stress show pro-inflammatory potential and cause endothelial barrier dysfunction. In turn, other OxPL products enhance basal EC barrier and exhibit potent barrier-protective effects in pathologic settings of acute vascular leak caused by pro-inflammatory mediators, barrier disruptive agonists and pathologic mechanical stimulation. These beneficial effects were further confirmed in rodent models of lung injury and inflammation. The bioactive oxidized lipid molecules may serve as important therapeutic prototype molecules for future treatment of acute lung injury syndromes associated with endothelial barrier dysfunction and inflammation. This review will summarize recent studies of biological effects exhibited by various groups of lipid mediators with a focus on the role of oxidized phospholipids in control of vascular endothelial barrier, agonist induced EC permeability, inflammation, and barrier recovery related to clinical settings of acute lung injury and inflammatory vascular leak.
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Affiliation(s)
- Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Konstantin G. Birukov
- Department of Anesthesiology, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA,CONTACT Konstantin G. Birukov, MD, PhD Department of Anesthesiology, University of Maryland, School of Medicine, 20 Penn Street, HSF-2, Room 145, Baltimore, MD 21201, USA
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18
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Gaschler MM, Stockwell BR. Lipid peroxidation in cell death. Biochem Biophys Res Commun 2017; 482:419-425. [PMID: 28212725 DOI: 10.1016/j.bbrc.2016.10.086] [Citation(s) in RCA: 985] [Impact Index Per Article: 140.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 10/23/2016] [Indexed: 02/07/2023]
Abstract
Disruption of redox homeostasis is a key phenotype of many pathological conditions. Though multiple oxidizing compounds such as hydrogen peroxide are widely recognized as mediators and inducers of oxidative stress, increasingly, attention is focused on the role of lipid hydroperoxides as critical mediators of death and disease. As the main component of cellular membranes, lipids have an indispensible role in maintaining the structural integrity of cells. Excessive oxidation of lipids alters the physical properties of cellular membranes and can cause covalent modification of proteins and nucleic acids. This review discusses the synthesis, toxicity, degradation, and detection of lipid peroxides in biological systems. Additionally, the role of lipid peroxidation is highlighted in cell death and disease, and strategies to control the accumulation of lipid peroxides are discussed.
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Affiliation(s)
- Michael M Gaschler
- Department of Chemistry, Columbia University, 550 West 120th Street, Northwest Corner Building, MC 4846, New York, NY 10027, USA
| | - Brent R Stockwell
- Department of Chemistry, Columbia University, 550 West 120th Street, Northwest Corner Building, MC 4846, New York, NY 10027, USA; Department of Biological Sciences, Columbia University, 550 West 120th Street, Northwest Corner Building, MC 4846, New York, NY 10027, USA.
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