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Auñon-Lopez A, Alberdi-Cedeño J, Pignitter M, Castejón N. Microalgae as a New Source of Oxylipins: A Comprehensive LC-MS-Based Analysis Using Conventional and Green Extraction Methods. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39016675 DOI: 10.1021/acs.jafc.4c03264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
Microalgae are promising sources of essential lipids, including omega-3 and omega-6 polyunsaturated fatty acids (n-3 and n-6 PUFA) and novel lipid metabolites like oxylipins. However, limited data exist on the oxylipin profile, its characterization, and the potential impact of the extraction process on these metabolites in microalgae. Thus, our study aimed to investigate the fatty acid and oxylipin profile of four microalgal species of interest (Microchloropsis gaditana, Tisochrysis lutea, Phaeodactylum tricornutum, and Porphyridium cruentum) while also examining the impact of the extraction method, with a focus on developing a greener process using ultrasound-assisted extraction (UAE) and ethanol. The UAE method showed similar oxylipin profiles, generally yielding concentrations comparable to those of the conventional Folch method. In total, 68 oxylipins derived from n-3 and n-6 PUFA were detected, with the highest concentrations of n-3 oxylipins found in P. tricornutum and T. lutea and of n-6 oxylipins in P. cruentum. This study provides the most extensive oxylipin characterization of these microalgae species to date, offering insights into alternative extraction methods and opening new avenues for further investigation of the significance of oxylipins in microalgae.
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Affiliation(s)
- Arturo Auñon-Lopez
- Institute of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Jon Alberdi-Cedeño
- Institute of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz (Alava), Spain
| | - Marc Pignitter
- Institute of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Natalia Castejón
- Institute of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
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2
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Meng N, Wang X, Song Y, Fan X, Zeng J, Feng T, Cong P, Xu J, Xue C. Characterization of oxylipins in Antarctic krill oil (Euphausia superba) during storage based on RPLC-MS/MS analysis. Food Chem 2024; 445:138702. [PMID: 38350200 DOI: 10.1016/j.foodchem.2024.138702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/25/2024] [Accepted: 02/05/2024] [Indexed: 02/15/2024]
Abstract
Antarctic krill oil (AKO) is rich in polyunsaturated fatty acids (PUFAs), but is prone to oxidative degradation, resulting in the formation of oxylipins, which compromise AKO quality. Herein, we used reversed-phase-high performance liquid chromatography-tandem mass spectrometry (RPLC-MS/MS) to perform qualitative and semi-quantitative analyses of oxylipins in AKO during storage. A total of 27 oxylipins were identified. A notable decrease in epoxy oxylipins (from 41.8 % to 26.9 % of the total oxylipins) was observed, whereas the content of dihydro oxylipins initially increased and then decreased with 48 h, as a pivotal point for AKO quality decline during storage. We suspected that the ratio of dihydroxyl and epoxy oxylipins could be a novel oxidative index to evaluate the oxidation of AKO. Statistical analysis allowed the identification of five oxylipins which showed unique correlations with various indexes. The findings discussed herein provide important new insights into mechanisms of oxidation occurring in AKO during storage.
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Affiliation(s)
- Nan Meng
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China
| | - Xincen Wang
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China; Institute of Nutrition and Health, Qingdao University, No. 308 Ningxia Road, Qingdao, Shandong 266071, China
| | - Yu Song
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China.
| | - Xiaowei Fan
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China
| | - Junpeng Zeng
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China
| | - Tingyu Feng
- Qingdao Institute of Marine Bioresources for Nutrition & Health Innovation, Qingdao, 266100, China
| | - Peixu Cong
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China.
| | - Jie Xu
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China.
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, Shandong 266500, China; Qingdao Marine Science and Technology Center, Qingdao 266235, China.
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3
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Hennebelle M, Villeneuve P, Durand E, Lecomte J, van Duynhoven J, Meynier A, Yesiltas B, Jacobsen C, Berton-Carabin C. Lipid oxidation in emulsions: New insights from the past two decades. Prog Lipid Res 2024; 94:101275. [PMID: 38280491 DOI: 10.1016/j.plipres.2024.101275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 01/29/2024]
Abstract
Lipid oxidation constitutes the main source of degradation of lipid-rich foods, including food emulsions. The complexity of the reactions at play combined with the increased demand from consumers for less processed and more natural foods result in additional challenges in controlling this phenomenon. This review provides an overview of the insights acquired over the past two decades on the understanding of lipid oxidation in oil-in-water (O/W) emulsions. After introducing the general structure of O/W emulsions and the classical mechanisms of lipid oxidation, the contribution of less studied oxidation products and the spatiotemporal resolution of these reactions will be discussed. We then highlight the impact of emulsion formulation on the mechanisms, taking into consideration the new trends in terms of emulsifiers as well as their own sensitivity to oxidation. Finally, novel antioxidant strategies that have emerged to meet the recent consumer's demand will be detailed. In an era defined by the pursuit of healthier, more natural, and sustainable food choices, a comprehensive understanding of lipid oxidation in emulsions is not only an academic quest, but also a crucial step towards meeting the evolving expectations of consumers and ensuring the quality and stability of lipid-rich food products.
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Affiliation(s)
- Marie Hennebelle
- Laboratory of Food Chemistry, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, Netherlands.
| | - Pierre Villeneuve
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - Erwann Durand
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - Jérôme Lecomte
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - John van Duynhoven
- Laboratory of Biophysics, Wageningen University & Research, Wageningen, the Netherlands; Unilever Food Innovation Centre, Wageningen, the Netherlands
| | | | - Betül Yesiltas
- Research group for Bioactives - Analysis and Application, Technical University of Denmark, National Food Institute, Kgs. Lyngby DK-2800, Denmark
| | - Charlotte Jacobsen
- Research group for Bioactives - Analysis and Application, Technical University of Denmark, National Food Institute, Kgs. Lyngby DK-2800, Denmark
| | - Claire Berton-Carabin
- INRAE, UR BIA, Nantes 44300, France; Laboratory of Food Process Engineering, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, Netherlands
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4
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Yang L, Choi J, Maier CS, Stevens JF. Profiling of Oxylipins as Markers of Oxidative Stress in Biological Samples. Curr Protoc 2024; 4:e992. [PMID: 38439570 DOI: 10.1002/cpz1.992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
Oxylipins are oxidized metabolites of polyunsaturated fatty acids (PUFAs). They represent a class of risk markers and/or therapeutic targets for diseases associated with inflammation, including cardiovascular disease and brain disorders. Because the biological activities of free PUFAs and oxylipins depend on their chemical structures and concentrations, monitoring PUFAs and oxylipin levels in biological systems is critical for understanding their roles in health and disease. Traditionally, accurate quantification of free PUFAs and oxylipins in biological samples was performed separately, as PUFAs are often 1000-fold more abundant than the derived oxidized fatty acids (oxylipins). This article describes a liquid chromatography multiple reaction monitoring tandem mass spectrometry method for the quantitative analysis of five free PUFAs and 88 oxylipins in various biological fluids, including plasma, platelet supernatants, and tissues. The same approach can also be used in conjunction with an alkaline hydrolysis step to quantify total oxylipins in fish oils. We observed that in some samples, linoleic acid levels in plasma and eicosapentaenoic acid and arachidonic acid levels in brain tissue were above the upper limit of quantification. To address this issue, we developed a data analysis method to obtain PUFA and oxylipin concentrations in these samples without additional sample preparation, thus significantly saving time and labor. © 2024 Wiley Periodicals LLC. Basic Protocol: Quantification of polyunsaturated fatty acids (PUFAs) and oxylipins using liquid chromatography multiple reaction monitoring tandem mass spectrometry Support Protocol 1: Preparation of internal standard mixed working solution Support Protocol 2: Preparation of standard mixed stock solution Support Protocol 3: Preparation of standard mixed working solution Alternate Protocol 1: Extraction and quantitation of free PUFAs and oxylipins from mouse brain tissue Alternate Protocol 2: Extraction and quantitation of total PUFAs and oxylipins from fish oil.
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Affiliation(s)
- Liping Yang
- Department of Chemistry, Oregon State University, Corvallis, Oregon
| | - Jaewoo Choi
- Department of Chemistry, Oregon State University, Corvallis, Oregon
| | - Claudia S Maier
- Department of Chemistry, Oregon State University, Corvallis, Oregon
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon
| | - Jan F Stevens
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon
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5
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Alberdi-Cedeño J, Aichner M, Mistlberger-Reiner A, Shi A, Pignitter M. Effect of Encapsulation Material on Lipid Bioaccessibility and Oxidation during In Vitro Digestion of Black Seed Oil. Antioxidants (Basel) 2023; 12:antiox12010191. [PMID: 36671054 PMCID: PMC9854819 DOI: 10.3390/antiox12010191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Different encapsulation materials might not only affect lipid hydrolysis but also lipid oxidation during in vitro digestion. Thus, this study aimed to investigate the effect of two commonly used shell materials, starch and gelatin, on the extent of lipolysis and bioaccessibility of the main and some minor lipid compounds, as well as on the oxidative status in encapsulated black seed oil (Nigella sativa) during in vitro digestion. The study was carried out using 1H nuclear magnetic resonance spectroscopy, liquid chromatography-mass spectrometry and high-performance liquid chromatography-UV. It was shown that starch increased the level of lipid hydrolysis in black seed oil during gastric in vitro digestion, while no differences were observed in the intestinal digestates between starch-encapsulated oil and gelatin-encapsulated oil. Similarly, the bioaccessibility of minor compounds (tocopherols, sterols and thymoquinone) was not influenced by the shell materials. However, regarding lipid oxidation, a 20- and 10-fold rise of free oxylipins was obtained in oils encapsulated by starch and gelatin, respectively, after intestinal in vitro digestion. This study evidenced that gelatin rather than starch should be used for the encapsulation of oils to minimize the digestion-induced formation of bioactive oxylipins.
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Affiliation(s)
- Jon Alberdi-Cedeño
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV-EHU), 01006 Vitoria-Gasteiz, Spain
| | - Martha Aichner
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Agnes Mistlberger-Reiner
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Aimin Shi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Marc Pignitter
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Correspondence:
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6
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Li J, Hu X, Yu C, Zeng K, Wang S, Tu Z. Rapid screening of oxidized metabolites of unsaturated fatty acids in edible oil by NanoESI-MS/MS. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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7
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Ferraz Teixeira B, Furlan Gonçalves Dias F, Ferreira de Souza Vieira TM, Y. Taha A, Leite Nobrega de Moura Bell JM. Early detection of lipid oxidation in infant milk formula by measuring free oxylipins—Comparison with hydroperoxide value and thiobarbituric acid reactive substance methods. J Food Sci 2022; 87:5252-5262. [DOI: 10.1111/1750-3841.16364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 09/16/2022] [Accepted: 09/30/2022] [Indexed: 11/19/2022]
Affiliation(s)
- Bianca Ferraz Teixeira
- Department of Food Science and Technology University of California, Davis Davis California USA
- Department of Agri‐food Industry, Food and Nutrition, College of Agriculture Luiz de Queiroz University of São Paulo Piracicaba Brazil
| | | | | | - Ameer Y. Taha
- Department of Food Science and Technology University of California, Davis Davis California USA
| | - Juliana Maria Leite Nobrega de Moura Bell
- Department of Food Science and Technology University of California, Davis Davis California USA
- Department of Biological and Agricultural Engineering University of California, Davis Davis California USA
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8
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Liang N, Emami S, Patten KT, Valenzuela AE, Wallis CD, Wexler AS, Bein KJ, Lein PJ, Taha AY. Chronic exposure to traffic-related air pollution reduces lipid mediators of linoleic acid and soluble epoxide hydrolase in serum of female rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 93:103875. [PMID: 35550873 PMCID: PMC9353974 DOI: 10.1016/j.etap.2022.103875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Chronic exposure to traffic-related air pollution (TRAP) is known to promote systemic inflammation, which is thought to underlie respiratory, cardiovascular, metabolic and neurological disorders. It is not known whether chronic TRAP exposure dampens inflammation resolution, the homeostatic process for stopping inflammation and repairing damaged cells. In vivo, inflammation resolution is facilitated by bioactive lipid mediators known as oxylipins, which are derived from the oxidation of polyunsaturated fatty acids. To understand the effects of chronic TRAP exposure on lipid-mediated inflammation resolution pathways, we measured total (i.e. free+bound) pro-inflammatory and pro-resolving lipid mediators in serum of female rats exposed to TRAP or filtered air (FA) for 14 months. Compared to rats exposed to FA, TRAP-exposed rats showed a significant 36-48% reduction in fatty acid alcohols, specifically, 9-hydroxyoctadecadienoic acid (9-HODE), 11,12-dihydroxyeicosatetraenoic acid (11,12-DiHETE) and 16,17-dihydroxydocosapentaenoic acid (16, 17-DiHDPA). The decrease in fatty acid diols (11,12-DiHETE and 16, 17-DiHDPA) corresponded to a significant 34-39% reduction in the diol to epoxide ratio, a marker of soluble epoxide hydrolase activity; this enzyme is typically upregulated during inflammation. The findings demonstrate that 14 months exposure to TRAP reduced pro-inflammatory 9-HODE concentration and dampened soluble epoxide hydrolase activation, suggesting adaptive immune changes in lipid mediator pathways involved in inflammation resolution.
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Affiliation(s)
- Nuanyi Liang
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California Davis, Davis, CA, USA
| | - Shiva Emami
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California Davis, Davis, CA, USA
| | - Kelley T Patten
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Anthony E Valenzuela
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA
| | | | - Anthony S Wexler
- Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA; Air Quality Research Center, University of California, Davis, Davis, CA, USA
| | - Keith J Bein
- Air Quality Research Center, University of California, Davis, Davis, CA, USA; Center for Health and the Environment, University of California, Davis, Davis, CA, USA
| | - Pamela J Lein
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Ameer Y Taha
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California Davis, Davis, CA, USA; West Coast Metabolomics Center, Genome Center, University of California Davis, Davis, CA, USA.
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9
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Koch E, Kampschulte N, Schebb NH. Comprehensive Analysis of Fatty Acid and Oxylipin Patterns in n3-PUFA Supplements. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3979-3988. [PMID: 35324176 DOI: 10.1021/acs.jafc.1c07743] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Supplementing long-chain omega-3 polyunsaturated fatty acids (n3-PUFA) improves health. We characterized the pattern of total and non-esterified oxylipins and fatty acids in n3 supplements made of fish, krill, or micro-algae oil by LC-MS. All supplements contained the declared amount of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA); however, their content per capsule and the concentration of other fatty acids varied strongly. Krill oil contained the highest total n3 oxylipin concentration (6000 nmol/g) and the highest degree of oxidation (EPA 0.7%; DHA 1.3%), while micro-algae oil (Schizochytrium sp.) showed the lowest oxidation (<0.09%). These oils contain specifically high amounts of the terminal hydroxylation product of EPA (20-HEPE, 300 nmol/g) and DHA (22-HDHA, 200 nmol/g), which can serve as an authenticity marker for micro-algae oil. Refined micro-algae and fish oil were characterized by NEFA levels of ≤0.1%. Overall, the oxylipin and fatty acid pattern allows gaining new insights into the origin and quality of n3-PUFA oils in supplements.
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Affiliation(s)
- Elisabeth Koch
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaussstrasse 20, 42119 Wuppertal, Germany
| | - Nadja Kampschulte
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaussstrasse 20, 42119 Wuppertal, Germany
| | - Nils Helge Schebb
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaussstrasse 20, 42119 Wuppertal, Germany
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10
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Vigor C, Balas L, Guy A, Bultel-Poncé V, Reversat G, Galano JM, Durand T, Oger C. Isoprostanoids, Isofuranoids and Isoketals ‐ From Synthesis to Lipidomics. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101523] [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)
- Claire Vigor
- Institut des Biomolecules Max Mousseron Bioactive Lipid Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
| | - Laurence Balas
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
| | - Alexandre Guy
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
| | - Valérie Bultel-Poncé
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard1919 route de Mende 34293 Montpellier FRENCH POLYNESIA
| | - Guillaume Reversat
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
| | - Jean-Marie Galano
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
| | - Thierry Durand
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
| | - Camille Oger
- Institut des Biomolecules Max Mousseron Bioactive Lipids Synthesis Pôle Chimie Balard Recherche1919 route de Mende 34293 Montpellier FRANCE
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11
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Pedersen TL, Smilowitz JT, Winter CK, Emami S, Schmidt RJ, Bennett DH, Hertz-Picciotto I, Taha AY. Quantification of Nonpersistent Pesticides in Small Volumes of Human Breast Milk with Ultrahigh Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6676-6689. [PMID: 34098718 PMCID: PMC8422964 DOI: 10.1021/acs.jafc.0c05950] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Existing methods for the analysis of pesticides in human breast milk involve multiple extraction steps requiring large sample and solvent volumes, which can be a major obstacle in large epidemiologic studies. Here, we developed a simple, low-volume method for extracting organophosphates, pyrethroids, carbamates, atrazine, and imidacloprid from 100 to 200 μL of human breast milk. Multiple extraction protocols were tested including microwave-assisted acid/base digestion and double-solvent extraction with 2 or 20 mL of 2:1 (v/v) dichloromethane/hexane, with or without subsequent solid-phase extraction (SPE) cleanup. Samples were analyzed by liquid chromatography tandem mass spectrometry. Analyte recoveries and reproducibility were highest when 100-200 μL of milk were extracted with 2 mL of dichloromethane/hexane without subsequent SPE steps. Analysis of 79 breast milk samples using this method revealed the presence of carbamates, organophosphates, pyrethroids, and imidacloprid at detection frequencies of 79-96, 53-90, 1-7, and 61%, respectively. This study demonstrates the feasibility of a simple low-volume extraction method for measuring pesticides in human breast milk.
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Affiliation(s)
- Theresa L Pedersen
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California-Davis, Davis 95616, California, United States
| | - Jennifer T Smilowitz
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California-Davis, Davis 95616, California, United States
- Foods for Health Institute, University of California-Davis, Davis 95616, California, United States
| | - Carl K Winter
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California-Davis, Davis 95616, California, United States
| | - Shiva Emami
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California-Davis, Davis 95616, California, United States
| | - Rebecca J Schmidt
- Department of Public Health Sciences, School of Medicine, University of California-Davis, Davis 95616, California, United States
- University of California-Davis, MIND (Medical Investigations of Neurodevelopmental Disorders) Institute, Sacramento 95817, California, United States
| | - Deborah H Bennett
- Department of Public Health Sciences, School of Medicine, University of California-Davis, Davis 95616, California, United States
| | - Irva Hertz-Picciotto
- Department of Public Health Sciences, School of Medicine, University of California-Davis, Davis 95616, California, United States
- University of California-Davis, MIND (Medical Investigations of Neurodevelopmental Disorders) Institute, Sacramento 95817, California, United States
| | - Ameer Y Taha
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California-Davis, Davis 95616, California, United States
- NIH-West Coast Metabolomics Center, Genome Center, University of California-Davis, Davis 95616, California, United States
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