1
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Yan T, Liang Z, Prentice BM. Imaging and Structural Characterization of Phosphatidylcholine Isomers from Rat Brain Tissue Using Sequential Collision-Induced Dissociation/Electron-Induced Dissociation. Anal Chem 2023; 95:15707-15715. [PMID: 37818979 PMCID: PMC10639000 DOI: 10.1021/acs.analchem.3c03077] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
The chemical complexity of biological tissues creates challenges in the analysis of lipids via imaging mass spectrometry. The presence of isobaric and isomeric compounds introduces chemical noise that makes it difficult to unambiguously identify and accurately map the spatial distributions of these compounds. Electron-induced dissociation (EID) has previously been shown to profile phosphatidylcholine (PCs) sn-isomers directly from rat brain tissue in matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry. However, the acquisition of true pixel-by-pixel images, as opposed to regional profiling measurements, using EID is difficult due to low fragmentation efficiency and precursor ion signal dilution into multiple fragment ion channels, resulting in low sensitivity. In this work, we have developed a sequential collision-induced dissociation (CID)/EID method to visualize the distribution of sn-isomers in MALDI imaging mass spectrometry experiments. Briefly, CID is performed on sodium-adducted PCs, which results in facile loss of the phosphocholine headgroup. This ion is then subjected to an EID analysis. Since the lipid headgroup is removed prior to EID, a major fragmentation pathway common to EID ion activation is eliminated, resulting in a more sensitive analysis. This sequential CID/EID workflow generates sn-specific fragment ions allowing for the assignment of the sn-positions. Carbon-carbon double-bond (C═C) positions are also localized along the fatty acyl tails by the presence of a 2 Da shift pattern in the fragment ions arising from carbon-carbon bond cleavages. Moreover, the integration of the CID/EID method into MALDI imaging mass spectrometry enables the mapping of the absolute and relative distribution of sn-isomers at every pixel. The localized relative abundances of sn-isomers vary throughout brain substructures and likely reflect different biological functions and metabolism.
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Affiliation(s)
- Tingting Yan
- Department of Chemistry, University of Florida, Gainesville, FL 32611
| | - Zhongling Liang
- Department of Chemistry, University of Florida, Gainesville, FL 32611
| | - Boone M. Prentice
- Department of Chemistry, University of Florida, Gainesville, FL 32611
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2
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Camunas-Alberca SM, Moran-Garrido M, Sáiz J, Gil-de-la-Fuente A, Barbas C, Gradillas A. Integrating the potential of ion mobility spectrometry-mass spectrometry in the separation and structural characterisation of lipid isomers. Front Mol Biosci 2023; 10:1112521. [PMID: 37006618 PMCID: PMC10060977 DOI: 10.3389/fmolb.2023.1112521] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 02/14/2023] [Indexed: 03/18/2023] Open
Abstract
It is increasingly evident that a more detailed molecular structure analysis of isomeric lipids is critical to better understand their roles in biological processes. The occurrence of isomeric interference complicates conventional tandem mass spectrometry (MS/MS)-based determination, necessitating the development of more specialised methodologies to separate lipid isomers. The present review examines and discusses recent lipidomic studies based on ion mobility spectrometry combined with mass spectrometry (IMS-MS). Selected examples of the separation and elucidation of structural and stereoisomers of lipids are described based on their ion mobility behaviour. These include fatty acyls, glycerolipids, glycerophospholipids, sphingolipids, and sterol lipids. Recent approaches for specific applications to improve isomeric lipid structural information using direct infusion, coupling imaging, or liquid chromatographic separation workflows prior to IMS-MS are also discussed, including: 1) strategies to improve ion mobility shifts; 2) advanced tandem MS methods based on activation of lipid ions with electrons or photons, or gas-phase ion-molecule reactions; and 3) the use of chemical derivatisation techniques for lipid characterisation.
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Affiliation(s)
- Sandra M. Camunas-Alberca
- Centro de Metabolómica y Bioanálisis (CEMBIO), Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
| | - Maria Moran-Garrido
- Centro de Metabolómica y Bioanálisis (CEMBIO), Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
| | - Jorge Sáiz
- Centro de Metabolómica y Bioanálisis (CEMBIO), Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
| | - Alberto Gil-de-la-Fuente
- Centro de Metabolómica y Bioanálisis (CEMBIO), Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
- Departamento de Tecnologías de la Información, Escuela Politécnica Superior, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
| | - Coral Barbas
- Centro de Metabolómica y Bioanálisis (CEMBIO), Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
| | - Ana Gradillas
- Centro de Metabolómica y Bioanálisis (CEMBIO), Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, Boadilla del Monte, Spain
- *Correspondence: Ana Gradillas,
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3
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Watanabe A, Hama K, Watanabe K, Fujiwara Y, Yokoyama K, Murata S, Takita R. Controlled Tetradeuteration of Straight‐Chain Fatty Acids: Synthesis, Application, and Insight into the Metabolism of Oxidized Linoleic Acid. Angew Chem Int Ed Engl 2022; 61:e202202779. [PMID: 35411582 PMCID: PMC9324819 DOI: 10.1002/anie.202202779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ayako Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Kotaro Hama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
- Advanced Comprehensive Research Organization (ACRO) Teikyo University Japan
| | - Kohei Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yuko Fujiwara
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Kazuaki Yokoyama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Shigeo Murata
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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4
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Watanabe A, Hama K, Watanabe K, Fujiwara Y, Yokoyama K, Murata S, Takita R. Controlled Tetradeuteration of Straight‐Chain Fatty Acids: Synthesis, Application, and Insight into the Metabolism of Oxidized Linoleic Acid. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ayako Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Kotaro Hama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
- Advanced Comprehensive Research Organization (ACRO) Teikyo University Japan
| | - Kohei Watanabe
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yuko Fujiwara
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Kazuaki Yokoyama
- Faculty of Pharma-Sciences Teikyo University 2-11-1 Kaga, Itabashi-ku Tokyo 173-8605 Japan
| | - Shigeo Murata
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- One-stop Sharing Facility Center for Future Drug Discoveries Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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5
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Magny R, Regazzetti A, Kessal K, Baudouin C, Mélik-Parsadaniantz S, Laprévote O, Brignole-Baudouin F, Auzeil N, Roulland E. Deepening of lipidome annotation by associating cross-metathesis reaction with mass spectrometry: application to an in vitro model of corneal toxicity. Anal Bioanal Chem 2021; 413:4825-4836. [PMID: 34125263 DOI: 10.1007/s00216-021-03438-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/20/2021] [Accepted: 05/26/2021] [Indexed: 12/17/2022]
Abstract
The in-depth knowledge of lipid biological functions needs a comprehensive structural annotation including a method to locate fatty acid unsaturations, which remains a thorny problem. For this purpose, we have associated Grubbs' cross-metathesis reaction and liquid chromatography hyphenated to tandem mass spectrometry to locate double bond positions in lipid species. The pretreatment of lipid-containing samples by Grubbs' catalyst and an appropriate alkene generates substituted lipids through cross-metathesis reaction under mild, chemoselective, and reproducible conditions. A systematic LC-MS/MS analysis of the reaction mixture allows locating unambiguously the double bonds in fatty acid side chains of phospholipids, glycerolipids, and sphingolipids. This method has been successfully applied at a nanomole scale to commercial standard mixtures consisting of 10 lipid subclasses as well as in lipid extracts of human corneal epithelial (HCE) cell line allowing to pinpoint double bond of more than 90 species. This method has also been useful to investigate the lipid homeostasis alteration in an in vitro model of corneal toxicity, i.e., HCE cells incubated with benzalkonium chloride. The association of cross-metathesis and tandem mass spectrometry appears suitable to locate double bond positions in lipids involved in relevant biological processes.
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Affiliation(s)
- Romain Magny
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, 75012, Paris, France.,C-TAC, CiTCoM, UMR 8038, CNRS Université de Paris, Faculté de Pharmacie, 75006, Paris, France
| | - Anne Regazzetti
- C-TAC, CiTCoM, UMR 8038, CNRS Université de Paris, Faculté de Pharmacie, 75006, Paris, France
| | - Karima Kessal
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, 75012, Paris, France.,CHNO des Quinze-Vingts, INSERM-DGOS CIC 1423, 75012, Paris, France
| | - Christophe Baudouin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, 75012, Paris, France.,CHNO des Quinze-Vingts, INSERM-DGOS CIC 1423, 75012, Paris, France.,Départment d'Ophthalmologie, Hôpital Ambroise Parée, AP HP, 92100, Boulogne, France.,Université Versailles St Quentin en Yvelines, 78180, Paris Saclay, Montigny-Le-Bretonneux, France
| | | | - Olivier Laprévote
- C-TAC, CiTCoM, UMR 8038, CNRS Université de Paris, Faculté de Pharmacie, 75006, Paris, France.,Hôpital Européen Georges Pompidou, AP-HP, Service de Biochimie, 75015, Paris, France
| | - Françoise Brignole-Baudouin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, 75012, Paris, France.,C-TAC, CiTCoM, UMR 8038, CNRS Université de Paris, Faculté de Pharmacie, 75006, Paris, France.,CHNO des Quinze-Vingts, INSERM-DGOS CIC 1423, 75012, Paris, France
| | - Nicolas Auzeil
- C-TAC, CiTCoM, UMR 8038, CNRS Université de Paris, Faculté de Pharmacie, 75006, Paris, France.
| | - Emmanuel Roulland
- C-TAC, CiTCoM, UMR 8038, CNRS Université de Paris, Faculté de Pharmacie, 75006, Paris, France.
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6
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Unsihuay D, Su P, Hu H, Qiu J, Kuang S, Li Y, Sun X, Dey SK, Laskin J. Imaging and Analysis of Isomeric Unsaturated Lipids through Online Photochemical Derivatization of Carbon–Carbon Double Bonds**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016734] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Daisy Unsihuay
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
| | - Pei Su
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
| | - Hang Hu
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
| | - Jiamin Qiu
- Department of Animal Sciences Purdue University 270 Russel Street West Lafayette IN 47907 USA
| | - Shihuan Kuang
- Department of Animal Sciences Purdue University 270 Russel Street West Lafayette IN 47907 USA
| | - Yingju Li
- Division of Reproductive Sciences Cincinnati Children's Hospital Medical Centre and Department of Pediatrics University of Cincinnati College of Medicine Cincinnati OH 45229 USA
| | - Xiaofei Sun
- Division of Reproductive Sciences Cincinnati Children's Hospital Medical Centre and Department of Pediatrics University of Cincinnati College of Medicine Cincinnati OH 45229 USA
| | - Sudhansu K. Dey
- Division of Reproductive Sciences Cincinnati Children's Hospital Medical Centre and Department of Pediatrics University of Cincinnati College of Medicine Cincinnati OH 45229 USA
| | - Julia Laskin
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
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7
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Unsihuay D, Su P, Hu H, Qiu J, Kuang S, Li Y, Sun X, Dey SK, Laskin J. Imaging and Analysis of Isomeric Unsaturated Lipids through Online Photochemical Derivatization of Carbon-Carbon Double Bonds*. Angew Chem Int Ed Engl 2021; 60:7559-7563. [PMID: 33460514 PMCID: PMC8815435 DOI: 10.1002/anie.202016734] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Indexed: 01/09/2023]
Abstract
Unraveling the complexity of the lipidome requires the development of novel approaches for the structural characterization of lipid species with isomer-level discrimination. Herein, we introduce an online photochemical approach for lipid isomer identification through selective derivatization of double bonds by reaction with singlet oxygen. Lipid hydroperoxide products are generated promptly after laser irradiation. Fragmentation of these species in a mass spectrometer produces diagnostic fragments revealing the C=C locations in the unreacted lipids. This approach uses an inexpensive light source and photosensitizer making it easy to incorporate into any lipidomics workflow. We demonstrate the utility of this approach for the shotgun profiling of C=C locations in different lipid classes present in tissue extracts using electrospray ionization (ESI) and ambient imaging of lipid species differing only by the location of C=C bonds using nanospray desorption electrospray ionization (nano-DESI).
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Affiliation(s)
- Daisy Unsihuay
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
| | - Pei Su
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
| | - Hang Hu
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
| | - Jiamin Qiu
- Department of Animal Sciences, Purdue University, 270 Russel Street, West Lafayette, IN, 47907, USA
| | - Shihuan Kuang
- Department of Animal Sciences, Purdue University, 270 Russel Street, West Lafayette, IN, 47907, USA
| | - Yingju Li
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Centre and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, 45229, USA
| | - Xiaofei Sun
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Centre and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, 45229, USA
| | - Sudhansu K Dey
- Division of Reproductive Sciences, Cincinnati Children's Hospital Medical Centre and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, 45229, USA
| | - Julia Laskin
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA
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8
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Lee D, Rubakhin SS, Kusmartseva I, Wasserfall C, Atkinson MA, Sweedler JV. Removing Formaldehyde‐Induced Peptidyl Crosslinks Enables Mass Spectrometry Imaging of Peptide Hormone Distributions from Formalin‐Fixed Paraffin‐Embedded Tissues. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dong‐Kyu Lee
- Department of Chemistry and Beckman institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 405 S. Mathews Ave. Urbana IL 61801 USA
| | - Stanislav S. Rubakhin
- Department of Chemistry and Beckman institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 405 S. Mathews Ave. Urbana IL 61801 USA
| | - Irina Kusmartseva
- Department of Pathology, Immunology and Laboratory Medicine College of Medicine University of Florida Gainesville FL 32610 USA
| | - Clive Wasserfall
- Department of Pathology, Immunology and Laboratory Medicine College of Medicine University of Florida Gainesville FL 32610 USA
| | - Mark A. Atkinson
- Department of Pathology, Immunology and Laboratory Medicine College of Medicine University of Florida Gainesville FL 32610 USA
| | - Jonathan V. Sweedler
- Department of Chemistry and Beckman institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 405 S. Mathews Ave. Urbana IL 61801 USA
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9
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Lee DK, Rubakhin SS, Kusmartseva I, Wasserfall C, Atkinson MA, Sweedler JV. Removing Formaldehyde-Induced Peptidyl Crosslinks Enables Mass Spectrometry Imaging of Peptide Hormone Distributions from Formalin-Fixed Paraffin-Embedded Tissues. Angew Chem Int Ed Engl 2020; 59:22584-22590. [PMID: 32762062 DOI: 10.1002/anie.202008847] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/05/2020] [Indexed: 12/14/2022]
Abstract
Linking molecular and chemical changes to human disease states depends on the availability of appropriate clinical samples, mostly preserved as formalin-fixed paraffin-embedded (FFPE) specimens stored in tissue banks. Mass spectrometry imaging (MSI) enables the visualization of the spatiotemporal distribution of molecules in biological samples. However, MSI is not effective for imaging FFPE tissues because of the chemical modifications of analytes, including complex crosslinking between nucleophilic moieties. Here we used an MS-compatible inorganic nucleophile, hydroxylamine hydrochloride, to chemically reverse inter- and intra-crosslinks from endogenous molecules. The analyte restoration appears specific for formaldehyde-reactive amino acids. This approach enabled the MSI-assisted localization of pancreatic peptides expressed in the alpha, beta, and gamma cells. Pancreatic islet-like distributions of islet hormones were observed in human FFPE tissues preserved for more than five years, demonstrating that samples from biobanks can effectively be investigated with MSI.
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Affiliation(s)
- Dong-Kyu Lee
- Department of Chemistry and Beckman institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Stanislav S Rubakhin
- Department of Chemistry and Beckman institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Irina Kusmartseva
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Clive Wasserfall
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Mark A Atkinson
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Jonathan V Sweedler
- Department of Chemistry and Beckman institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 S. Mathews Ave., Urbana, IL, 61801, USA
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10
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Ekroos K, Lavrynenko O, Titz B, Pater C, Hoeng J, Ivanov NV. Lipid-based biomarkers for CVD, COPD, and aging - A translational perspective. Prog Lipid Res 2020; 78:101030. [PMID: 32339553 DOI: 10.1016/j.plipres.2020.101030] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/23/2020] [Accepted: 03/16/2020] [Indexed: 12/11/2022]
Abstract
For many diseases, there is an unmet need for new or better biomarkers for improved disease risk assessment and monitoring, as available markers lack sufficient specificity. Lipids are drawing major interest as potential candidates for filling these gaps. This has recently been demonstrated by the identification of selective ceramides for prediction of cardiovascular mortality, enabling improved risk assessment of cardiovascular disease compared with conventional clinical markers. In this review, we discuss current lipid biomarker findings and the possible connection between cardiovascular disease, chronic obstructive pulmonary disease, and aging. Moreover, we discuss how to overcome the current roadblocks facing lipid biomarker research. We stress the need for improved quantification, standardization of methodologies, and establishment of initial reference values to allow for an efficient transfer path of research findings into the clinical landscape, and, ultimately, to put newly identified biomarkers into practical use.
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Affiliation(s)
- Kim Ekroos
- Lipidomics Consulting Ltd., Irisviksvägen 31D, 02230 Esbo, Finland.
| | - Oksana Lavrynenko
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland.
| | - Bjoern Titz
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland.
| | - Calin Pater
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland.
| | - Julia Hoeng
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland.
| | - Nikolai V Ivanov
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland.
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11
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van Smaalen TC, Ellis SR, Mascini NE, Siegel TP, Cillero-Pastor B, Hillen LM, van Heurn LWE, Peutz-Kootstra CJ, Heeren RMA. Rapid Identification of Ischemic Injury in Renal Tissue by Mass-Spectrometry Imaging. Anal Chem 2019; 91:3575-3581. [PMID: 30702282 PMCID: PMC6581420 DOI: 10.1021/acs.analchem.8b05521] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 01/31/2019] [Indexed: 12/14/2022]
Abstract
The increasing analytical speed of mass-spectrometry imaging (MSI) has led to growing interest in the medical field. Acute kidney injury is a severe disease with high morbidity and mortality. No reliable cut-offs are known to estimate the severity of acute kidney injury. Thus, there is a need for new tools to rapidly and accurately assess acute ischemia, which is of clinical importance in intensive care and in kidney transplantation. We investigated the value of MSI to assess acute ischemic kidney tissue in a porcine model. A perfusion model was developed where paired kidneys received warm (severe) or cold (minor) ischemia ( n = 8 per group). First, ischemic tissue damage was systematically assessed by two blinded pathologists. Second, MALDI-MSI of kidney tissues was performed to study the spatial distributions and compositions of lipids in the tissues. Histopathological examination revealed no significant difference between kidneys, whereas MALDI-MSI was capable of a detailed discrimination of severe and mild ischemia by differential expression of characteristic lipid-degradation products throughout the tissue within 2 h. In particular, lysolipids, including lysocardiolipins, lysophosphatidylcholines, and lysophosphatidylinositol, were dramatically elevated after severe ischemia. This study demonstrates the significant potential of MSI to differentiate and identify molecular patterns of early ischemic injury in a clinically acceptable time frame. The observed changes highlight the underlying biochemical processes of acute ischemic kidney injury and provide a molecular classification tool that can be deployed in assessment of acute ischemic kidney injury.
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Affiliation(s)
- T. C. van Smaalen
- Department
of Surgery, Maastricht University Medical
Center+, 6229 HX Maastricht, The Netherlands
| | - S. R. Ellis
- The
Maastricht Multimodal Molecular Imaging Institute (M4I), Division
of Imaging Mass Spectrometry, Maastricht
University, 6200 MD Maastricht, The Netherlands
| | - N. E. Mascini
- The
Maastricht Multimodal Molecular Imaging Institute (M4I), Division
of Imaging Mass Spectrometry, Maastricht
University, 6200 MD Maastricht, The Netherlands
| | - T. Porta Siegel
- The
Maastricht Multimodal Molecular Imaging Institute (M4I), Division
of Imaging Mass Spectrometry, Maastricht
University, 6200 MD Maastricht, The Netherlands
| | - B. Cillero-Pastor
- The
Maastricht Multimodal Molecular Imaging Institute (M4I), Division
of Imaging Mass Spectrometry, Maastricht
University, 6200 MD Maastricht, The Netherlands
| | - L. M. Hillen
- Department
of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center+, 6229 HX Maastricht, The Netherlands
- GROW-School
for Oncology and Developmental Biology, Maastricht University Medical Center+, 6229 HX Maastricht, The Netherlands
| | - L. W. E. van Heurn
- Department
of Surgery, Maastricht University Medical
Center+, 6229 HX Maastricht, The Netherlands
| | - C. J. Peutz-Kootstra
- Department
of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center+, 6229 HX Maastricht, The Netherlands
| | - R. M. A. Heeren
- The
Maastricht Multimodal Molecular Imaging Institute (M4I), Division
of Imaging Mass Spectrometry, Maastricht
University, 6200 MD Maastricht, The Netherlands
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