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Xiong F, Jiang K, Wu Y, Lou C, Ding C, Zhang W, Zhang X, Li C, Zheng H, Gao H. Intermittent fasting alleviates type 1 diabetes-induced cognitive dysfunction by improving the frontal cortical metabolic disorder. Biochim Biophys Acta Mol Basis Dis 2023:166725. [PMID: 37127173 DOI: 10.1016/j.bbadis.2023.166725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/06/2023] [Accepted: 04/17/2023] [Indexed: 05/03/2023]
Abstract
Intermittent fasting (IF) is an ecological strategy to control various metabolic disorder symptoms, but its protective effect on type 1 diabetes (T1D)-induced cognitive dysfunction and the underlying mechanisms remain poorly defined. Herein, we examined the efficacy of IF in altering the behaviors and brain metabolome in T1D mice and investigated the potential molecular mechanisms. We demonstrated that IF remarkably improved frontal cortical-dependent memory in T1D mice and reduced the loss of neuronal cells. Metabolomics and targeted mass spectrometry assay showed that IF reprogrammed the frontal cortical metabolome composition, including activated the aspartate and glutamate pathway and reversed glycerophospholipid and sphingolipid depositions in T1D mice. Mechanistically, IF attenuated the levels of oxidative stress proteins, such as NOX2, NOX4, 8-OHdG, 4-HNE, and inhibited the levels of pro-apoptotic factors Bax and cleaved Caspase-3, finally improved the memory ability of T1D mice. In vitro studies confirmed the protective effect of the supplemented N-acetylaspartate, a pivotal metabolite involved in IF-regulated T1D-induced cognitive dysfunction, in high glucose-stimulated SH-SY5Y cells by eliminating toxic lipids accumulation, oxidative stress and apoptosis. To conclude, the frontal cortical metabolites mediated the protective effects of IF against T1D-induced cognitive dysfunction by attenuating oxidative stress and apoptotic signaling. Thus, IF can be a potential therapeutic strategy for T1D-induced cognitive dysfunction.
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Affiliation(s)
- Fen Xiong
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Kaiyuan Jiang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Yali Wu
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Cong Lou
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Chengjie Ding
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Wenli Zhang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Xi Zhang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Chen Li
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China.
| | - Hong Zheng
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China.
| | - Hongchang Gao
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Institute of Metabonomics & Medical NMR, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Efficacy Evaluation of Traditional Chinese Medicine and Encephalopathy Research of Zhejiang Province, Wenzhou 325035, China.
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Mucinski JM, McCaffrey JM, Rector RS, Kasumov T, Parks EJ. Relationship between hepatic and mitochondrial ceramides: A novel in vivo method to track ceramide synthesis. J Lipid Res 2023; 64:100366. [PMID: 37028768 DOI: 10.1016/j.jlr.2023.100366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 04/08/2023] Open
Abstract
Ceramides (CERs) are key intermediate sphingolipids implicated in contributing to mitochondrial dysfunction and the development of multiple metabolic conditions. Despite the growing evidence of CERs role in disease risk, kinetic methods to measure CER turnover are lacking, particularly using in vivo models. The utility of orally-administered 13C3, 15N L-serine, dissolved in drinking water, was tested to quantify CER 18:1/16:0 synthesis in 10 week-old male and female C57Bl/6 mice. To generate isotopic labeling curves, animals consumed either a control (CD) or high fat diet (HFD; n=24/diet) for two weeks and varied in the duration of the consumption of serine-labeled water (0, 1, 2, 4, 7, or 12 days; n=four animals/day/diet). Unlabeled and labeled hepatic and mitochondrial CERs were quantified using liquid chromatography tandem mass spectrometry. Total hepatic CER content did not differ between the two diet groups while total mitochondrial CERs increased with HFD feeding (60%, P<0.001). Within hepatic and mitochondrial pools, HFD induced greater saturated CER concentrations (P<0.05) and significantly elevated absolute turnover of 16:0 mitochondrial CER (mitochondria: 59%, P<0.001 versus liver: 15%, P=0.256). The data suggest cellular redistribution of CERs due to the HFD. These data demonstrate that a two-week HFD alters the turnover and content of mitochondrial CERs. Given the growing data on CERs contributing to hepatic mitochondrial dysfunction and the progression of multiple metabolic diseases, this method may now be used to investigate how CER turnover is altered in these conditions.
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Hao H, Jia X, Ren T, Du Y, Wang J. Novel insight into the mechanism underlying synergistic cytotoxicity from two components in 5-Fluorouracil-phenylalanine co-crystal based on cell metabolomics. Eur J Pharm Biopharm 2022; 180:181-189. [DOI: 10.1016/j.ejpb.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 09/21/2022] [Accepted: 10/03/2022] [Indexed: 11/04/2022]
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Xue Q, Liu X, Zhu R, Zhang T, Dong X, Jiang Y. Comprehensive analysis of transcriptomics and metabolomics to understand chronic ethanol induced murine cardiotoxicity. Mol Cell Biochem 2022; 478:1345-1359. [PMID: 36309883 DOI: 10.1007/s11010-022-04592-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/13/2022] [Indexed: 11/29/2022]
Abstract
Alcohol abuse has attracted public attention and long-term alcohol exposure can lead to alcohol-featured non-ischemic dilated cardiomyopathy. However, the precise underlying mechanisms of alcoholic cardiomyopathy remain to be elucidated. This study aimed to comprehensively characterize alcohol abuse-mediated effects on downstream metabolites and genes transcription using a multi-omics strategy. We established chronic ethanol intoxication model in adult male C57BL/6 mice through 8 weeks of 95% alcohol vapor administration and performed metabolomics analysis, mRNA-seq and microRNA-seq analysis with myocardial tissues. Firstly, ethanol markedly induced ejection fraction reductions, cardiomyocyte hypertrophy, and myocardial fibrosis in mice with myocardial oxidative injury. In addition, the omics analysis identified a total of 166 differentially expressed metabolites (DEMs), 241 differentially expressed genes (DEGs) and 19 differentially expressed microRNAs (DEmiRNAs), respectively. The results highlighted that alcohol abuse mainly interfered with endogenous lipids, amino acids and nucleotides production and the relevant genes transcription in mice hearts. Based on KEGG database, the affected signaling pathways are primarily mapped to the antigen processing and presentation, regulation of actin cytoskeleton, AMPK signaling pathway, tyrosine metabolism and PPAR signaling pathway, etc. Furthermore, 9 hub genes related to oxidative stress from DEGs were selected based on function annotation, and potential alcoholic cardiotoxic oxidative stress biomarkers were determined through establishing PPI network and DEmiRNAs-DEGs cross-talk. Altogether, our data strongly supported the conclusion that ethanol abuse characteristically affected amino acid and energy metabolism, nucleotide metabolism and especially lipids metabolism in mice hearts, and underlined the values of lipids signaling and oxidative stress in the treatment strategies.
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Affiliation(s)
- Qiupeng Xue
- Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Xiaochen Liu
- Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Rongzhe Zhu
- Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Tianyi Zhang
- Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Xiaoru Dong
- Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Yan Jiang
- Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China.
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Ferreira Azevedo L, Masiero MM, Cherkaoui S, Hornos Carneiro MF, Barbosa F, Zamboni N. The alternative analog plasticizer BPS displays similar phenotypic and metabolomic responses to BPA in HepG2 and INS-1E cells. Food Chem Toxicol 2022; 167:113266. [PMID: 35779701 DOI: 10.1016/j.fct.2022.113266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 05/30/2022] [Accepted: 06/24/2022] [Indexed: 10/17/2022]
Abstract
Bisphenols A (BPA) and S (BPS) are endocrine-disrupting chemicals that affect energy metabolism, leading to impairment of glucose and lipid homeostasis. We aimed at identifying metabolic pathways regulated by both compounds in human liver cells and rat pancreatic β-cells that could impair energy homeostasis regulation. We assessed the effects on growth, proliferation, and viability of hepatocarcinoma (HepG2) and insulinoma (INS-1E) cells exposed to either BPA or BPS in a full range concentration between 0.001 and 100 μM. Both the dose and duration of exposure caused a differential response on growth and viability of both cells. Effects were more pronounced on HepG2, as these cells exhibited non-linear dose-responses following exposure to xenobiotics. For INS-1E, effect was observed only at the highest concentration. In addition, we profiled their intracellular state by untargeted metabolomics at 24, 48, and 72 h of exposure. This analysis revealed time- and dose-dependently molecular changes for HepG2 and INS-1E that were similar between BPA and BPS. Both increased levels of inflammatory mediators, such as metabolites pertaining to linolenic and linoleic acid metabolic pathway. In summary, this study shows that BPS also disrupts molecular functions in cells that regulate energy homeostasis, displaying similar but less pronounced responses than BPA.
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Affiliation(s)
- L Ferreira Azevedo
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. Café s/n, 14040-903, Ribeirão Preto, SP, Brazil; Institute of Molecular Systems Biology, ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland.
| | - Mauro Miguel Masiero
- Institute of Molecular Systems Biology, ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland; PhD Program in Systems Biology, Life Science Zürich, 8057, Zürich, Switzerland.
| | - S Cherkaoui
- Institute of Molecular Systems Biology, ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland; PhD Program in Systems Biology, Life Science Zürich, 8057, Zürich, Switzerland; Division of Metabolism, University Children's Hospital Zürich and Children's Research Center, University of Zürich, Switzerland; Department of Pediatric and Adolescent Oncology, Gustave Roussy Cancer Center, Université Paris-Saclay, INSERM U1015, Villejuif, France.
| | - M F Hornos Carneiro
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. Café s/n, 14040-903, Ribeirão Preto, SP, Brazil; Department of Pharmacy, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, 7820436, Chile.
| | - F Barbosa
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. Café s/n, 14040-903, Ribeirão Preto, SP, Brazil.
| | - N Zamboni
- Institute of Molecular Systems Biology, ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland.
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Sidorov EV, Xu C, Garcia-Ramiu J, Blair A, Ortiz-Garcia J, Gordon D, Chainakul J, Sanghera DK. Global Metabolomic Profiling Reveals Disrupted Lipid and Amino Acid Metabolism Between the Acute and Chronic Stages of Ischemic Stroke. J Stroke Cerebrovasc Dis 2022; 31:106320. [PMID: 35104745 PMCID: PMC8957579 DOI: 10.1016/j.jstrokecerebrovasdis.2022.106320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 12/28/2021] [Accepted: 01/09/2022] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Stroke is a major cause of serious disability in the United States. Previous studies found multiple associations of serum metabolites with acute ischemic stroke (AIS) compared to controls, but few of them evaluated metabolome in a longitudinal fashion. Therefore, we compared the metabolome of the acute and chronic stages of ischemic stroke. METHODS We evaluated 1295 serum metabolites from the cohort of 60 stroke patients at acute and chronic stages by performing global metabolomics using ultra-high-performance liquid chromatography/mass spectrometry (LC-MS) and gas chromatography/mass spectrometry (GC-MS). We used Orthogonal Partial Least Square-Discrimination Analysis (OPLS-DA) to inspect group disparity and a mixed regression model to compare metabolites in the acute and chronic stages with Two-Stage Benjamini & Hochberg (TSBH) and Bonferroni correction for multiple testing. RESULTS The OPLS-DA revealed significant separation of acute and chronic stage metabolites. Mixed regression identified 228 metabolites with TSBH, and 29 metabolites with Bonferroni correction different in acute and chronic stages. At the acute stage, there was a consistent increase of the metabolites of mono/diacylglycerols, sphingolipids, medium/long-chain fatty acids, and amino acids glycine, valine, and tyrosine. At the same time, there was a consistent decrease of the metabolites of acyl-choline related fatty acids, phospholipids, and amino acids alanine, aspartate, and tyramine. Additionally, we identified eight novel metabolites significantly altered at the acute stage of stroke. CONCLUSION Our pilot study demonstrated significant alterations in metabolomic patterns between the acute and chronic stages of stroke, validating some case-control findings. Future investigation in a larger independent cohort is warranted to identify early biomarkers of acute ischemic stroke.
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Affiliation(s)
- Evgeny V Sidorov
- Department of Neurology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma city, Oklahoma, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA.
| | - Chao Xu
- Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, USA
| | - Jonathan Garcia-Ramiu
- Department of Neurology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma city, Oklahoma, USA
| | - Apple Blair
- Department of Neurology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma city, Oklahoma, USA
| | - Jorge Ortiz-Garcia
- Department of Neurology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma city, Oklahoma, USA
| | - David Gordon
- Department of Neurology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma city, Oklahoma, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA
| | - Juliane Chainakul
- Department of Neurology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma city, Oklahoma, USA
| | - Dharambir K Sanghera
- Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA; Pediatrics, College of Medicine, University of Oklahoma Health Sciences Center, USA; Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, USA; Physiology, College of Medicine, University of Oklahoma Health Sciences Center, USA; Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, USA
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Altered metabolic pathways elucidated via untargeted in vivo toxicometabolomics in rat urine and plasma samples collected after controlled application of a human equivalent amphetamine dose. Arch Toxicol 2021; 95:3223-3234. [PMID: 34414480 PMCID: PMC8448701 DOI: 10.1007/s00204-021-03135-8] [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: 06/02/2021] [Accepted: 08/11/2021] [Indexed: 10/28/2022]
Abstract
Amphetamine is widely consumed as drug of abuse due to its stimulating and cognitive enhancing effects. Since amphetamine has been on the market for quite a long time and it is one of the most commonly used stimulants worldwide, to date there is still limited information on its effects on the metabolome. In recent years, untargeted toxicometabolomics have been increasingly used to study toxicity-related pathways of such drugs of abuse to find and identify important endogenous and exogenous biomarkers. In this study, the acute effects of amphetamine intake on plasma and urinary metabolome in rats were investigated. For this purpose, samples of male Wistar rats after a single dose of amphetamine (5 mg/kg) were compared to a control group using an untargeted metabolomics approach. Analysis was performed using normal and reversed phase liquid chromatography coupled to high-resolution mass spectrometry using positive and negative ionization mode. Statistical evaluation was performed using Welch's two-sample t test, hierarchical clustering, as well as principal component analysis. The results of this study demonstrate a downregulation of amino acids in plasma samples after amphetamine exposure. Furthermore, four new potential biomarkers N-acetylamphetamine, N-acetyl-4-hydroxyamphetamine, N-acetyl-4-hydroxyamphetamine glucuronide, and amphetamine succinate were identified in urine. The present study complements previous data and shows that several studies are necessary to elucidate altered metabolic pathways associated with acute amphetamine exposure.
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Application of Q-TOF-MS based metabonomics techniques to analyze the plasma metabolic profile changes on rats following death due to acute intoxication of phorate. Int J Legal Med 2021; 135:1437-1447. [PMID: 33987742 DOI: 10.1007/s00414-021-02532-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 02/10/2021] [Indexed: 11/27/2022]
Abstract
Organophosphorus pesticides (OPS) are widely used in the world, and many poisoning cases were caused by them. Phorate intoxication is especially common in China. However, there are currently few methods for discriminating phorate poisoning death from phorate exposure after death and interpretation of false-positive results due to the lack of effective biomarkers. In this study, we investigated the metabonomics of rat plasma at different dose levels of acute phorate intoxication using ultra-performance liquid chromatography quadrupole-time of flight mass spectrometry (UPLC-Q-TOF-MS) analysis. A total of 11 endogenous metabolites were significantly changed in the groups exposed to phorate at LD50 level and three times of LD50 (3LD50) level compared with the control group, which could be potential biomarkers of acute phorate intoxication. Plasma metabonomics analysis showed that diethylthiophosphate (DETP) could be a useful biomarker of acute phorate intoxication. The levels of uric acid, acylcarnitine, succinate, gluconic acid, and phosphatidylcholine (PC) (36:2) were increased, while pyruvate level was decreased in all groups exposed to phorate. The levels of ceramides (Cer) (d 18:0/16:0), palmitic acid, and lysophosphatidylcholine (lysoPC) (18:1) were only changed after 3LD50 dosage. The results of this study indicate that the dose-dependent relationship exists between metabolomic profile change and toxicities associated with apoptosis, fatty acid metabolism disorder, energy metabolism disorder especially tricarboxylic acid (TCA) cycle, as well as liver, kidney, and nervous system functions after acute exposure of phorate. This study shows that metabonomics is a useful tool in identifying biomarkers for the forensic toxicology study of phorate poisoning.
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Ščupáková K, Dewez F, Walch AK, Heeren RMA, Balluff B. Morphometric Cell Classification for Single-Cell MALDI-Mass Spectrometry Imaging. Angew Chem Int Ed Engl 2020; 59:17447-17450. [PMID: 32668069 PMCID: PMC7540554 DOI: 10.1002/anie.202007315] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/04/2020] [Indexed: 12/14/2022]
Abstract
The large-scale and label-free molecular characterization of single cells in their natural tissue habitat remains a major challenge in molecular biology. We present a method that integrates morphometric image analysis to delineate and classify individual cells with their single-cell-specific molecular profiles. This approach provides a new means to study spatial biological processes such as cancer field effects and the relationship between morphometric and molecular features.
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Affiliation(s)
- Klára Ščupáková
- Maastricht MultiModal Molecular Imaging Institute (M4I)University of MaastrichtUniversiteitssingel 506200 MDMaastrichtThe Netherlands
| | - Frédéric Dewez
- Maastricht MultiModal Molecular Imaging Institute (M4I)University of MaastrichtUniversiteitssingel 506200 MDMaastrichtThe Netherlands
- Mass Spectrometry Laboratory (MSLab)University of LiègeBelgium
| | - Axel K. Walch
- Research Unit Analytical PathologyHelmholtz Zentrum MünchenOberschleißheimGermany
| | - Ron M. A. Heeren
- Maastricht MultiModal Molecular Imaging Institute (M4I)University of MaastrichtUniversiteitssingel 506200 MDMaastrichtThe Netherlands
| | - Benjamin Balluff
- Maastricht MultiModal Molecular Imaging Institute (M4I)University of MaastrichtUniversiteitssingel 506200 MDMaastrichtThe Netherlands
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10
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Ščupáková K, Dewez F, Walch AK, Heeren RMA, Balluff B. Morphometric Cell Classification for Single‐Cell MALDI‐Mass Spectrometry Imaging. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007315] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Klára Ščupáková
- Maastricht MultiModal Molecular Imaging Institute (M4I) University of Maastricht Universiteitssingel 50 6200 MD Maastricht The Netherlands
| | - Frédéric Dewez
- Maastricht MultiModal Molecular Imaging Institute (M4I) University of Maastricht Universiteitssingel 50 6200 MD Maastricht The Netherlands
- Mass Spectrometry Laboratory (MSLab) University of Liège Belgium
| | - Axel K. Walch
- Research Unit Analytical Pathology Helmholtz Zentrum München Oberschleißheim Germany
| | - Ron M. A. Heeren
- Maastricht MultiModal Molecular Imaging Institute (M4I) University of Maastricht Universiteitssingel 50 6200 MD Maastricht The Netherlands
| | - Benjamin Balluff
- Maastricht MultiModal Molecular Imaging Institute (M4I) University of Maastricht Universiteitssingel 50 6200 MD Maastricht The Netherlands
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11
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Maliković J, Vuyyuru H, Koefeler H, Smidak R, Höger H, Kalaba P, Hussein AM, Lubec G, Korz V. Moderate differences in common feeding diets change lipid composition in the hippocampal dentate gyrus and affect spatial cognitive flexibility in male rats. Neurochem Int 2019; 128:215-221. [PMID: 31051212 DOI: 10.1016/j.neuint.2019.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/27/2019] [Accepted: 04/30/2019] [Indexed: 01/17/2023]
Abstract
There is growing evidence that lipids play a fundamental role in neuronal plasticity and learning and memory. Effects of nutrition on brain lipid composition and neuronal functioning are known, but the feeding interventions are often severe and may not reflect nutritional effects below clinical relevance. Therefore, we tested two commercially available rat feeding diets with only moderate differences in the food compositions, a standard diet (gross energy metabolizable 12.8 MJ/kg) and a energy reduced diet (gross energy metabolizable 8.9 MJ/kg) on possible effects upon dentate gyrus lipid composition, spatial learning and memory in a water maze and corticosterone release (blood serum concentrations) in adult male rats. Rats were fed with the standard diet up to an age of 8 weeks. One group was further fed with the standard and another with the energy reduced diet until an age of 5 months. We did not found differences in serum corticosterone levels. We found group differences in a variety of lipids in the hippocampal dentate gyrus.. Most of the lipid levels were lower in energy reduced diets, namely glycerophosphoethanolamines, sphingomyelins and hexosyceramides, whereas some ceramides (Cer18:0 and Cer24:1) and glycerophosphocholines (PC34:3 and PC36:2) were upregulated compared to the standard diet group. The performance in a common reference memory water maze task was not different between groups, however during reversal learning (platform in a different position) after the initial training, the standard diet fed rats learned better and spatial memory was improved compared to the energy reduced diet group. Thus, moderate differences in feeding diets have effects specifically upon spatial cognitive flexibility. Possible relations between differences in lipid composition and cognitive flexibility are discussed.
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Affiliation(s)
- Jovana Maliković
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Harish Vuyyuru
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Harald Koefeler
- Center for Medical Research (ZMF), Medical University Graz, 8010, Graz, Austria
| | - Roman Smidak
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Harald Höger
- Core Unit of Biomedical Research, Division of Laboratory Animal Science and Genetics, Medical University of Vienna, Vienna, Austria
| | - Predrag Kalaba
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Ahmed M Hussein
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Gert Lubec
- Paracelsus Medical University, 5020, Salzburg, Austria.
| | - Volker Korz
- Paracelsus Medical University, 5020, Salzburg, Austria.
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12
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Li Y, Liang L, Deng X, Zhong L. Lipidomic and metabolomic profiling reveals novel candidate biomarkers in active systemic lupus erythematosus. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2019; 12:857-866. [PMID: 31933894 PMCID: PMC6945160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 01/23/2019] [Indexed: 06/10/2023]
Abstract
Systemic lupus erythematosus (SLE) is a challenging disease caused by both genetic and environmental influences. Symptoms of SLE vary and they may come and go, therefore diagnosis and treatment of the disease is difficult. Serum metabolites can not only serve as biomarkers of the disease but also can reveal the pathogenesis. Thus, it is important to find reliable biomarkers for early diagnosis and treatment of the disease, which would greatly benefit SLE patients. Our purpose was to study the metabolite profiles in active systemic lupus erythematosus and to identify metabolites that are significantly altered. Serum samples from 34 participants (17 SLE and 17 healthy) were collected and analyzed. Untargeted lipidomics and metabolomics were used to study the metabolite profiles in serum by high-performance liquid chromatography-tandem mass spectrometry. Serum enzyme-linked immunosorbent assay was performed to validate differentially expressed metabolites. We identified differential expression of over 50 metabolites. These metabolites include several new SLE related metabolite species such as ceramide, trimethylamine N-oxide, xanthine, which were significantly elevated in the serum of active systemic lupus erythematosus patients. Some other metabolites include acylcarnitine, caffeine, hydrocortisone, itaconic acid and serotonin were down-regulated. Our study characterizes the circulating metabolites in active systemic lupus erythematosus and provides several candidate biomarkers for the diagnosis and potential therapeutic targets of the disease.
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Affiliation(s)
- Yuhua Li
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science CenterBeijing, China
| | - Ling Liang
- Department of Biophysics, School of Basic Medical Sciences, Peking University Health Science CenterBeijing, China
| | - Xiaoli Deng
- Department of Rheumatolgoy and Immunology, Peking University Third HospitalBeijing, China
| | - Lijun Zhong
- Center of Medical and Health Analysis, Peking University Health Science CenterBeijing, China
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13
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Metabolomic Profiling of Plasma from Patients with Tuberculosis by Use of Untargeted Mass Spectrometry Reveals Novel Biomarkers for Diagnosis. J Clin Microbiol 2015; 53:3750-9. [PMID: 26378277 DOI: 10.1128/jcm.01568-15] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/05/2015] [Indexed: 12/17/2022] Open
Abstract
Although tuberculosis (TB) is a reemerging disease that affects people in developing countries and immunocompromised populations in developed countries, the current diagnostic methods are far from optimal. Metabolomics is increasingly being used for studies on infectious diseases. We performed metabolome profiling of plasma samples to identify potential biomarkers for diagnosing TB. We compared the plasma metabolome profiles of TB patients (n = 46) with those of community-acquired pneumonia (CAP) patients (n = 30) and controls without active infection (n = 30) using ultrahigh-performance liquid chromatography-electrospray ionization-quadrupole time of flight mass spectrometry (UHPLC-ESI-QTOFMS). Using multivariate and univariate analyses, four metabolites, 12R-hydroxy-5Z,8Z,10E,14Z-eicosatetraenoic acid [12(R)-HETE], ceramide (d18:1/16:0), cholesterol sulfate, and 4α-formyl-4β-methyl-5α-cholesta-8-en-3β-ol, were identified and found to have significantly higher levels in TB patients than those in CAP patients and controls. In a comparison of TB patients and controls, the four metabolites demonstrated area under the receiver operating characteristic curve (AUC) values of 0.914, 0.912, 0.905, and 0.856, sensitivities of 84.8%, 84.8%, 87.0%, and 89.1%, specificities of 90.0%, 86.7%, 86.7%, and 80.0%, and fold changes of 4.19, 26.15, 6.09, and 1.83, respectively. In a comparison of TB and CAP patients, the four metabolites demonstrated AUC values of 0.793, 0.717, 0.802, and 0.894, sensitivities of 89.1%, 71.7%, 80.4%, and 84.8%, specificities of 63.3%, 66.7%, 70.0%, and 83.3%, and fold changes of 4.69, 3.82, 3.75, and 2.16, respectively. 4α-Formyl-4β-methyl-5α-cholesta-8-en-3β-ol combined with 12(R)-HETE or cholesterol sulfate offered ≥70% sensitivity and ≥90% specificity for differentiating TB patients from controls or CAP patients. These novel plasma biomarkers, especially 12(R)-HETE and 4α-formyl-4β-methyl-5α-cholesta-8-en-3β-ol, alone or in combination, are potentially useful for rapid and noninvasive diagnosis of TB. The present findings may offer insights into the pathogenesis and host response in TB.
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Edwards G, Aribindi K, Guerra Y, Bhattacharya SK. Sphingolipids and ceramides of mouse aqueous humor: Comparative profiles from normotensive and hypertensive DBA/2J mice. Biochimie 2014; 105:99-109. [PMID: 25014247 DOI: 10.1016/j.biochi.2014.06.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 06/25/2014] [Indexed: 11/17/2022]
Abstract
PURPOSE To identify the sphingolipid and ceramide species and their quantitative differences between normotensive and hypertensive intraocular pressure states in DBA/2J mouse aqueous humor (AH). METHODS Normotensive and hypertensive AH was sampled from mice by paracentesis. Lipid extraction was performed using modifications of the Bligh and Dyer method. Protein concentration was estimated using the Bradford colorimetric assay. Sphingolipids and ceramides were identified and subjected to ratiometric quantification using appropriate class specific lipid standards on a TSQ Quantum Access Max triple quadrupole mass spectrometer. RESULTS The comparative profiles of normotensive and hypertensive DBA/2J mouse AH showed several species of sphingomyelin, sphingoid base, sphingoid base-1-phosphate (S1P) and ceramides common between them. A number of unique lipids in each of the above lipid classes were also identified in normotensive AH that were absent in hypertensive AH and vice versa. CONCLUSION A number of sphingolipid and ceramide species were found to be uniquely present in normotensive, but absent in hypertensive AH and vice versa. Further pursuit of these findings is likely to contribute towards expanding our understanding of the molecular changes associated with increased intraocular pressure (IOP) and glaucoma.
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Affiliation(s)
- Genea Edwards
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136, USA
| | - Katyayini Aribindi
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136, USA
| | - Yenifer Guerra
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136, USA
| | - Sanjoy K Bhattacharya
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136, USA.
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Application of stable isotopes to investigate the metabolism of fatty acids, glycerophospholipid and sphingolipid species. Prog Lipid Res 2014; 54:14-31. [PMID: 24462586 DOI: 10.1016/j.plipres.2014.01.002] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 12/30/2013] [Accepted: 01/07/2014] [Indexed: 11/22/2022]
Abstract
Nature provides an enormous diversity of lipid molecules that originate from various pathways. To gain insight into the metabolism and dynamics of lipid species, the application of stable isotope-labeled tracers combined with mass spectrometric analysis represents a perfect tool. This review provides an overview of strategies to track fatty acid, glycerophospholipid, and sphingolipid metabolism. In particular, the selection of stable isotope-labeled precursors and their mass spectrometric analysis is discussed. Furthermore, examples of metabolic studies that were performed in cell culture, animal and clinical experiments are presented.
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Johnson W, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler D, Marks JG, Shank RC, Slaga TJ, Snyder PW, Andersen FA. Safety Assessment of 1,2-Glycols as Used in Cosmetics. Int J Toxicol 2012; 31:147S-68S. [DOI: 10.1177/1091581812460409] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Caprylyl glycol and related 1,2-glycols are used mostly as skin and hair conditioning agents and viscosity agents in cosmetic products, and caprylyl glycol and pentylene glycol also function as cosmetic preservatives. The Cosmetic Ingredient Review (CIR) Expert Panel noted that, while these ingredients are dermally absorbed, modeling data predicted decreased skin penetration of longer chain 1,2-glycols. Because the negative oral toxicity data on shorter chain 1,2-glycols and genotoxicity data support the safety of the 1,2-glycols reviewed in this safety assessment, the Panel concluded that these ingredients are safe in the present practices of use and concentration described in this safety assessment.
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Noguchi Y, Young JD, Aleman JO, Hansen ME, Kelleher JK, Stephanopoulos G. Tracking cellular metabolomics in lipoapoptosis- and steatosis-developing liver cells. MOLECULAR BIOSYSTEMS 2011; 7:1409-19. [PMID: 21327189 DOI: 10.1039/c0mb00309c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Palmitate (PA) is known to induce reactive oxygen species (ROS) formation and apoptosis in liver cells, whereas concurrent treatment of oleate (OA) with PA predominately induces steatosis without ROS in liver cells. We previously reported that PA treatment induces the decoupling of glycolysis and tricarboxylic acid cycle (TCA cycle) fluxes, but OA co-treatment restored most metabolic fluxes to their control levels. However, the mechanisms by which metabolites are linked to metabolic fluxes and subsequent lipoapoptotic or steatotic phenotypes remain unclear. To determine the link, we used GC-MS-based polar and non-polar metabolic profiling in lipoapoptosis- or steatosis-developing H4IIEC3 hepatoma cells, to examine the metabolome at different time points after treatment with either PA alone (PA cells) or both PA and OA (PA/OA cells). Metabolic profiles revealed various changes in metabolite levels for TCA cycle intermediates, pentose phosphate pathway (PPP) intermediates, and energy storage metabolites between PA and PA/OA cells. For example, adenosine was markedly increased only in PA cells, whereas gluconate was increased in PA/OA cells. To assess the interaction among these metabolites, the metabolite-to-metabolite correlations were calculated and correlation networks were visualized. These correlation networks demonstrate that a dissociation among PPP metabolites was introduced in PA-treated cells, and this dissociation was restored in PA/OA-treated cells. Thus, our data suggest that abnormal PPP fluxes, in addition to increased adenosine levels, might be related to the decoupling of glycolysis and the resulting lipoapoptotic phenotype.
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Affiliation(s)
- Yasushi Noguchi
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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18
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Drug target identification in sphingolipid metabolism by computational systems biology tools: Metabolic control analysis and metabolic pathway analysis. J Biomed Inform 2010; 43:537-49. [DOI: 10.1016/j.jbi.2010.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Revised: 11/24/2009] [Accepted: 03/22/2010] [Indexed: 11/21/2022]
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19
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Gustafsson K, Sander B, Bielawski J, Hannun YA, Flygare J. Potentiation of cannabinoid-induced cytotoxicity in mantle cell lymphoma through modulation of ceramide metabolism. Mol Cancer Res 2009; 7:1086-98. [PMID: 19609004 DOI: 10.1158/1541-7786.mcr-08-0361] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Ceramide levels are elevated in mantle cell lymphoma (MCL) cells following treatment with cannabinoids. Here, we investigated the pathways of ceramide accumulation in the MCL cell line Rec-1 using the stable endocannabinoid analogue R(+)-methanandamide (R-MA). We further interfered with the conversion of ceramide into sphingolipids that promote cell growth. Treatment with R-MA led to increased levels of ceramide species C16, C18, C24, and C(24:1) and transcriptional induction of ceramide synthases (CerS) 3 and 6. The effects were attenuated using SR141716A, which has high affinity to cannabinoid receptor 1 (CB1). The CB1-mediated induction of CerS3 and CerS6 mRNA was confirmed using Win-55,212-2. Simultaneous silencing of CerS3 and CerS6 using small interfering RNA abrogated the R-MA-induced accumulation of C16 and C24. Inhibition of either of the enzymes serine palmitoyl transferase, CerS, and dihydroceramide desaturase within the de novo ceramide pathway reversed ceramide accumulation and cell death induced by R-MA treatment. To enhance the cytotoxic effect R-MA, sphingosine kinase-1 and glucosylceramide synthase, enzymes that convert ceramide to the pro-proliferative sphingolipids sphingosine-1-phospate and glucosylceramide, respectively, were inhibited. Suppression of either enzyme using inhibitors or small interfering RNA potentiated the decreased viability, induction of cell death, and ceramide accumulation induced by R-MA treatment. Our findings suggest that R-MA induces cell death in MCL via CB1-mediated up-regulation of the de novo ceramide synthesis pathway. Furthermore, this is the first study were the cytotoxic effect of a cannabinoid is enhanced by modulation of ceramide metabolism.
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Affiliation(s)
- Kristin Gustafsson
- Department of Laboratory Medicine, Division of Pathology, Karolinska Institutet and Karolinska University Hospital Huddinge, Stockholm, Sweden
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20
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Viktorov AV, Yurkiv VA. Effects of ethanol and lipopolysaccharide on the sphingomyelin cycle in rat hepatocytes. Bull Exp Biol Med 2009; 146:753-5. [PMID: 19513375 DOI: 10.1007/s10517-009-0379-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Lipopolysaccharide toxin added to primary hepatocyte culture slightly modified the basal concentrations of (3)H-serine-labeled sphingomyelin, sphingosine, and ceramide. Ethanol reduced the levels of sphingomyelin and sphingosine by 20-25 and 15-20%, respectively, but increased ceramide content by 7-17%. Tumor necrosis factor reduced the concentrations of sphingomyelin and sphingosine, but did not modify the content of ceramide. Combined treatment with lipopolysaccharide toxin and ethanol potentiated the effect of alcohol.
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Affiliation(s)
- A V Viktorov
- Laboratory of Molecular Mechanisms of Infections, Institute of Epidemiology, Moscow, Russia.
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21
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Schiffmann S, Sandner J, Schmidt R, Birod K, Wobst I, Schmidt H, Angioni C, Geisslinger G, Grösch S. The selective COX-2 inhibitor celecoxib modulates sphingolipid synthesis. J Lipid Res 2009; 50:32-40. [DOI: 10.1194/jlr.m800122-jlr200] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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22
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Kraveka JM, Li L, Szulc ZM, Bielawski J, Ogretmen B, Hannun YA, Obeid LM, Bielawska A. Involvement of dihydroceramide desaturase in cell cycle progression in human neuroblastoma cells. J Biol Chem 2007; 282:16718-28. [PMID: 17283068 PMCID: PMC2084375 DOI: 10.1074/jbc.m700647200] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The role of dihydroceramide desaturase as a key enzyme in the de novo pathway of ceramide generation was investigated in human neuroblastoma cells (SMS-KCNR). A novel assay using water-soluble analogs of dihydroceramide, dihydroceramidoids (D-erythro-dhCCPS analogs), was used to measure desaturase activity in situ. Conversion of D-erythro-2-N-[12'-(1''-pyridinium)-dodecanoyl]-4,5-dihydrosphingosine bromide (C(12)-dhCCPS) to its 4,5-desaturated counterpart, D-erythro-2-N-[12'-(1''-pyridinium)dodecanoyl]sphingosine bromide (C(12)-CCPS), was determined by liquid chromatography/mass spectrometry analysis. The validity of the assay was confirmed using C(8)-cyclopropenylceramide, a competitive inhibitor of dihydroceramide desaturase. A human homolog (DEGS-1) of the Drosophila melanogaster des-1 gene was recently identified and reported to have desaturase activity. Transfection of SMS-KCNR cells with small interfering RNA to DEGS-1 significantly blocked the conversion of C(12)-dhCCPS to C(12)-CCPS. The associated accumulation of endogenous dihydroceramides confirmed DEGS-1 as the main active dihydroceramide desaturase in these cells. The partial loss of DEGS-1 inhibited cell growth, with cell cycle arrest at G(0)/G(1). This was accompanied by a significant decrease in the amount of phosphorylated retinoblastoma protein. This hypophosphorylation was inhibited by tautomycin and not by okadaic acid, suggesting the involvement of protein phosphatase 1. Additionally, we found that treatment of SMS-KCNR cells with fenretinide inhibited desaturase activity in a dose-dependent manner. An increase in dihydroceramides (but not ceramides) paralleled this process as measured by liquid chromatography/mass spectrometry. There were no effects on the mRNA or protein levels of DEGS-1, suggesting that fenretinide acts at the post-translational level as an inhibitor of this enzyme. Tautomycin was also able to block the hypophosphorylation of the retinoblastoma protein observed upon fenretinide treatment. These findings suggest a novel biological function for dihydroceramides.
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Affiliation(s)
- Jacqueline M Kraveka
- Division of Hematology/Oncology, Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina 29425, USA.
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23
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Brahmbhatt VV, Hsu FF, Kao JLF, Frank EC, Ford DA. Novel carbonyl and nitrile products from reactive chlorinating species attack of lysosphingolipid. Chem Phys Lipids 2007; 145:72-84. [PMID: 17126823 DOI: 10.1016/j.chemphyslip.2006.10.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2006] [Revised: 10/26/2006] [Accepted: 10/26/2006] [Indexed: 11/24/2022]
Abstract
Lysosphingolipids are important lipid signaling molecules that are associated predominantly with high density lipoproteins (HDL) in human plasma. Further, HDL has been shown to be a target for the reactive chlorinating species (RCS) produced by myeloperoxidase (MPO). Accordingly, RCS attack of lysosphingolipids was characterized in these studies. It was shown that RCS attack of sphingosylphosphorylcholine results in the formation of 2-hexadecenal and 1-cyano methano phosphocholine. The structures were identified and confirmed predominantly using mass spectrometric analyses. Further, it was demonstrated that RCS attack of another bioactive lysosphingolipid sphingosine 1-phosphate also results in the formation of 2-hexadecenal from its sphingosine base. Using a synthetically prepared, deuterated 2-hexadecenal internal standard, it was determined that 2-hexadecenal quickly accumulated in HDL treated with MPO/RCS generating system. Thus, the present studies characterize the formation of a novel group of lipid products generated following RCS attack of lysosphingolipids.
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Affiliation(s)
- Viral V Brahmbhatt
- Department of Biochemistry and Molecular Biology, St. Louis University Medical Center, St. Louis, MO 63104, USA
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24
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Tauzin L, Graf C, Sun M, Rovina P, Bouveyron N, Jaritz M, Winiski A, Hartmann N, Staedtler F, Billich A, Baumruker T, Zhang M, Bornancin F. Effects of ceramide-1-phosphate on cultured cells: dependence on dodecane in the vehicle. J Lipid Res 2006; 48:66-76. [PMID: 17018884 DOI: 10.1194/jlr.m600399-jlr200] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Ceramide-1-phosphate (C1P), the product of ceramide kinase, is a sphingophospholipid with recently recognized signaling properties. In particular, it was reported to be mitogenic and capable of direct stimulation of cytosolic phospholipase A(2alpha). Much of the present knowledge has relied on the use of C1P of various acyl chain lengths, together with diverse protocols to deliver it to cultured cells. A mixture of ethanol (or methanol) with dodecane, as the vehicle, has become popular. However, the contribution of this solvent to the observed effects of C1P has not been documented. Here, we show that addition of C1P in ethanol-dodecane to culture medium leads to irreversible cytotoxic effects. These culminate in mitochondrial swelling, vacuole formation, and cell death. Not only the toxicity of C1P, but also its ability to trigger prostaglandin E2 release, is fully dependent upon addition of a premade C1P-dodecane mixture. Furthermore, we show that these effects are not restricted to C1P. They result from the capacity of dodecane to interact with phospholipids; hence, they go undetected with a vehicle control. This study should raise awareness about the use of dodecane for phospholipid delivery and, in turn, help in unraveling C1P signaling, which is still poorly understood.
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Affiliation(s)
- Loïc Tauzin
- Novartis Institutes for BioMedical Research, A-1235 Vienna, Austria
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25
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Szulc ZM, Bielawski J, Gracz H, Gustilo M, Mayroo N, Hannun YA, Obeid LM, Bielawska A. Tailoring structure-function and targeting properties of ceramides by site-specific cationization. Bioorg Med Chem 2006; 14:7083-104. [PMID: 16919460 DOI: 10.1016/j.bmc.2006.07.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Revised: 06/29/2006] [Accepted: 07/01/2006] [Indexed: 01/01/2023]
Abstract
In the course of our studies on compartment-specific lipid-mediated cell regulation, we identified an intimate connection between ceramides (Cers) and the mitochondria-dependent death-signaling pathways. Here, we report on a new class of cationic Cer mimics, dubbed ceramidoids, designed to act as organelle-targeted sphingolipids (SPLs), based on conjugates of Cer and dihydroceramide (dhCer) with pyridinium salts (CCPS and dhCCPS, respectively). Ceramidoids having the pyridinium salt unit (PSU) placed internally (alpha and gamma- CCPS) or as a tether (omega-CCPS) in the N-acyl moiety were prepared by N-acylation of sphingoid bases with different omega-bromo acids or pyridine carboxylic acid chlorides following capping with respective pyridines or alkyl bromides. Consistent with their design, these analogs, showed a significantly improved solubility in water, well-resolved NMR spectra in D(2)O, broadly modified hydrophobicity, fast cellular uptake, and higher anticancer activities in cells in comparison to uncharged counterparts. Structure-activity relationship (SAR) studies in MCF-7 breast carcinoma cells revealed that the location of the PSU and its overall chain length affected markedly the cytotoxic effects of these ceramidoids. All omega-CCPSs were more potent (IC(50/48 h): 0.6-8.0 microM) than their alpha/gamma-CCPS (IC(50/48 h): 8-20 microM) or D-erythro-C6-Cer (IC(50/48 h): 15 microM) analogs. omega-DhCCPSs were also moderately potent (IC(50/48 h): 2.5-12.5 microM). Long-chain omega-dhCCPSs were rapidly and efficiently oxidized in cells to the corresponding omega-CCPSs, as established by LC-MS analysis. CCPS analogs also induced acute changes in the levels and composition of endogenous Cers (upregulation of C16-, C14-, and C18-Cers, and downregulation of C24:0- and C24:1-Cers). These novel ceramidoids illustrate the feasibility of compartment-targeted lipids, and they should be useful in cell-based studies as well as potential novel therapeutics.
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Affiliation(s)
- Zdzislaw M Szulc
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, 29425, USA
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Okere IC, Chandler MP, McElfresh TA, Rennison JH, Sharov V, Sabbah HN, Tserng KY, Hoit BD, Ernsberger P, Young ME, Stanley WC. Differential effects of saturated and unsaturated fatty acid diets on cardiomyocyte apoptosis, adipose distribution, and serum leptin. Am J Physiol Heart Circ Physiol 2006; 291:H38-44. [PMID: 16443671 DOI: 10.1152/ajpheart.01295.2005] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Fatty acids are the primary fuel for the heart and are ligands for peroxisome proliferator-activated receptors (PPARs), which regulate the expression of genes encoding proteins involved in fatty acid metabolism. Saturated fatty acids, particularly palmitate, can be converted to the proapoptotic lipid intermediate ceramide. This study assessed cardiac function, expression of PPAR-regulated genes, and cardiomyocyte apoptosis in rats after 8 wk on either a low-fat diet [normal chow control (NC); 10% fat calories] or high-fat diets composed mainly of either saturated (Sat) or unsaturated fatty acids (Unsat) (60% fat calories) (n = 10/group). The Sat group had lower plasma insulin and leptin concentrations compared with the NC or Unsat groups. Cardiac function and mass and body mass were not different. Cardiac triglyceride content was increased in the Sat and Unsat groups compared with NC (P < 0.05); however, ceramide content was higher in the Sat group compared with the Unsat group (2.9 +/- 0.2 vs. 1.4 +/- 0.2 nmol/g; P < 0.05), whereas the NC group was intermediate (2.3 +/- 0.3 nmol/g). The number of apoptotic myocytes, assessed by terminal deoxynucleotide transferase-mediated dUTP nick-end labeling staining, was higher in the Sat group compared with the Unsat group (0.28 +/- 0.05 vs. 0.17 +/- 0.04 apoptotic cells/1,000 nuclei; P < 0.04) and was positively correlated to ceramide content (P < 0.02). Both high-fat diets increased the myocardial mRNA expression of the PPAR-regulated genes encoding uncoupling protein-3 and pyruvate dehydrogenase kinase-4, but only the Sat diet upregulated medium-chain acyl-CoA dehydrogenase. In conclusion, dietary fatty acid composition affects cardiac ceramide accumulation, cardiomyocyte apoptosis, and expression of PPAR-regulated genes independent of cardiac mass or function.
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Affiliation(s)
- Isidore C Okere
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4970, USA
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Beier UH, Görögh T. Implications of galactocerebrosidase and galactosylcerebroside metabolism in cancer cells. Int J Cancer 2005; 115:6-10. [PMID: 15657896 DOI: 10.1002/ijc.20851] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Galactosylcerebroside is known to be overexpressed upon the cellular surface of a variety of cancers. In squamous cell carcinomas of the head and neck, one explanation for galactosylcerebroside accumulation has been identified as a transcriptional repression of the galactocerebrosidase gene. Galactocerebrosidase is the enzyme responsible for degrading galactosylcerebroside to ceramide. Ceramide is an important apoptosis activator, whereas galactosylcerebroside functions as an inhibitor. A shift of the ceramide metabolism balance in favor of glycosylated forms has been identified as a mechanism of drug resistance for several antineoplastic agents. Our review elaborates on possible explanations for galactocerebrosidase suppression and on other explanations for increased glycosphingolipid concentration within cancer cell membranes. Furthermore, conjecturable influences of a repressed galactocerebrosidase expression on tumor biology are to be explained. The inhibiting transcription factors YY1 and AP2 have been identified as potential galactocerebrosidase gene suppressors. The resulting accumulation of galactosylcerebroside promotes a reduction of cellular adhesion and inhibits apoptosis, leading to increased cellular growth, migration and prolonged cell survival contributing to carcinogenesis.
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Affiliation(s)
- Ulf Henning Beier
- Division of Molecular Oncology, Department of Otorhinolaryngology, Head and Neck Surgery,Christian-Albrechts-University of Kiel, Kiel, Germany
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Jiang Q, Wong J, Fyrst H, Saba JD, Ames BN. gamma-Tocopherol or combinations of vitamin E forms induce cell death in human prostate cancer cells by interrupting sphingolipid synthesis. Proc Natl Acad Sci U S A 2004; 101:17825-30. [PMID: 15596715 PMCID: PMC535585 DOI: 10.1073/pnas.0408340102] [Citation(s) in RCA: 151] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
gamma-Tocopherol (gammaT), the predominant form of vitamin E in diets, but not alpha-tocopherol, the major vitamin E form in tissues and supplements, inhibits proliferation of prostate cancer cells (LNCaP and PC-3) and lung cancer cells (A549). In contrast, at similar concentrations, gammaT has no effect on normal prostate epithelial cells. Combinations of some vitamin E forms, such as gammaT and delta-tocopherol, exhibit additive or synergistic inhibitory effects. In this study, gammaT or its combination with delta-tocopherol induced apoptosis in androgen-sensitive prostate LNCaP, but not in androgen-resistant PC-3 cells, by the induction of cytochrome c release, activation of caspase 9 and caspase 3, cleavage of poly-ADP-ribose polymerase (PARP), and involvement of caspase-independent pathways. Myriocin and fumonisin B1, specific inhibitors of key enzymes (serine palmitoyltransferase and dihydroceramide synthase, respectively) in de novo synthesis of sphingolipids, significantly protected cells from gammaT-induced DNA fragmentation, cytochrome c release, PARP cleavage, and the formation of active caspase 3. Compared with vehicle-treated controls, gammaT treatment led to pronounced dihydroceramide and dihydrosphingosine accumulation, which preceded morphological and biochemical manifestations of apoptosis. In contrast, ceramide and shpingosine levels did not increase until day 3, when substantial cell death took place. Our study demonstrates that gammaT and mixed vitamin E forms induce cell death by interrupting the de novo sphingolipid pathway in a prostate cancer cell line. Thus, certain vitamin E forms may be valuable as anticancer agents.
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Affiliation(s)
- Qing Jiang
- Children's Hospital Oakland Research Institute, 5700 Martin Luther King Jr. Way, Oakland, CA 94609, USA.
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