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Yoda T. Materials evaluation using cell-sized liposomes. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:5509-5518. [PMID: 39109603 DOI: 10.1039/d4ay00803k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
Cell membranes play a vital role in delineating the internal cellular environment from the external surroundings, going beyond mere compartmentalization. Researchers have delved into the structural organization, properties, and functional roles of biological membranes, paving the way for their application in substance identification, detection, and quantification. This review introduces various studies and their implications for future research. It underscores the advantages of employing cell-sized liposomes, which enable real-time observation for rapid detection and analysis of diverse materials. The utility of cell-sized liposomes extends to their size, dynamic shape changes, and phase-separation, offering valuable insights into the evaluation of targeted materials.
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Affiliation(s)
- Tsuyoshi Yoda
- Industrial Research Institute, Aomori Prefectural Industrial Technology Research Center, 221-10 Yamaguchi Nogi, Aomori City, Aomori, 030-0142, Japan.
- The United Graduate School of Agricultural Sciences, Iwate University, 3-18-8, Ueda, Morioka City, Iwate 020-8550, Japan
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2
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Eurén T, Gower B, Steneberg P, Wilson A, Edlund H, Chorell E. Myofiber-specific lipidomics unveil differential contributions to insulin sensitivity in individuals of African and European ancestry. Heliyon 2024; 10:e32456. [PMID: 38994058 PMCID: PMC11237840 DOI: 10.1016/j.heliyon.2024.e32456] [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: 11/28/2023] [Revised: 05/30/2024] [Accepted: 06/04/2024] [Indexed: 07/13/2024] Open
Abstract
Aims Individuals of African ancestry (AA) present with lower insulin sensitivity compared to their European counterparts (EA). Studies show ethnic differences in skeletal muscle fiber type (lower type I fibers in AA), muscle fat oxidation capacity (lower in AA), whilst no differences in total skeletal muscle lipids. However, skeletal muscle lipid subtypes have not been examined in this context. We hypothesize that lower insulin sensitivity in AA is due to a greater proportion of type II (non-oxidative) muscle fibers, and that this would result in an ancestry-specific association between muscle lipid subtypes and peripheral insulin sensitivity. To test this hypothesis, we examined the association between insulin sensitivity and muscle lipids in AA and EA adults, and in an animal model of insulin resistance with muscle-specific fiber types. Methods In this cross-sectional study, muscle biopsies were obtained from individuals with a BMI ranging from normal to overweight with AA (N = 24) and EA (N = 19). Ancestry was assigned via genetic admixture analysis; peripheral insulin sensitivity via hyperinsulinaemic-euglycemic clamp; and myofiber content via myosin heavy chain immunohistochemistry. Further, muscle types with high (soleus) and low (vastus lateralis) type I fiber content were obtained from high-fat diet-induced insulin resistant F1 mice and littermate controls. Insulin sensitivity in mice was assessed via intraperitoneal glucose tolerance test. Mass spectrometry (MS)-based lipidomics was used to measure skeletal muscle lipid. Results Compared to EA, AA had lower peripheral insulin sensitivity and lower oxidative type 1 myofiber content, with no differences in total skeletal muscle lipid content. Muscles with lower type I fiber content (AA and vastus from mice) showed lower levels of lipids associated with fat oxidation capacity, i.e., cardiolipins, triacylglycerols with low saturation degree and phospholipids, compared to muscles with a higher type 1 fiber content (EA and soleus from mice). Further, we found that muscle diacylglycerol content was inversely associated with insulin sensitivity in EA, who have more type I fiber, whereas no association was found in AA. Similarly, we found that insulin sensitivity in mice was associated with diacylglycerol content in the soleus (high in type I fiber), not in vastus (low in type I fiber).Conclusions; Our data suggest that the lipid contribution to altered insulin sensitivity differs by ethnicity due to myofiber composition, and that this needs to be considered to increase our understanding of underlying mechanisms of altered insulin sensitivity in different ethnic populations.
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Affiliation(s)
- Tova Eurén
- Public Health and Clinical Medicine, Umeå University, Sweden
| | - Barbara Gower
- Department of Nutrition Sciences, The University of Alabama at Birmingham, USA
| | - Pär Steneberg
- Department of Medical and Translational Biology, Umeå University, Sweden
| | - Andréa Wilson
- Public Health and Clinical Medicine, Umeå University, Sweden
| | - Helena Edlund
- Department of Medical and Translational Biology, Umeå University, Sweden
| | - Elin Chorell
- Public Health and Clinical Medicine, Umeå University, Sweden
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3
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Janikiewicz J, Dobosz AM, Majzner K, Bernas T, Dobrzyn A. Stearoyl-CoA desaturase 1 deficiency exacerbates palmitate-induced lipotoxicity by the formation of small lipid droplets in pancreatic β-cells. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166711. [PMID: 37054998 DOI: 10.1016/j.bbadis.2023.166711] [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: 12/13/2022] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/15/2023]
Abstract
The accelerating accumulation of surplus lipids in the pancreas triggers structural and functional changes in type 2 diabetes-affected islets. Pancreatic β-cells exhibit a restricted capacity to store fat reservoirs in lipid droplets (LDs), which act as transient buffers to prevent lipotoxic stress. With the increasing incidence of obesity, growing interest has been seen in the intracellular regulation of LD metabolism for β-cell function. Stearoyl-CoA desaturase 1 (SCD1) is critical for producing unsaturated fatty acyl moieties for fluent storage into and out of LDs, likely affecting the overall rate of β-cell survival. We explored LD-associated composition and remodeling in SCD1-deprived INS-1E cells and in pancreatic islets in wildtype and SCD1-/- mice in the lipotoxic milieu. Deficiency in the enzymatic activity of SCD1 led to decrease in the size and number of LDs and the lower accumulation of neutral lipids. This occurred in parallel with a higher compactness and lipid order inside LDs, followed by changes in the saturation status and composition of fatty acids within core lipids and the phospholipid coat. The lipidome of LDs was enriched in 18:2n-6 and 20:4n-6 in β-cells and pancreatic islets. These rearrangements markedly contributed to differences in protein association with the LD surface. Our findings highlight an unexpected molecular mechanism by which SCD1 activity affects the morphology, composition and metabolism of LDs. We demonstrate that SCD1-dependent disturbances in LD enrichment can impact proper pancreatic β-cells and islet functioning, which may have considerable therapeutic value for the management of type 2 diabetes.
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Affiliation(s)
- Justyna Janikiewicz
- Laboratory of Cell Signaling and Metabolic Disorders, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.
| | - Aneta M Dobosz
- Laboratory of Cell Signaling and Metabolic Disorders, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Katarzyna Majzner
- Faculty of Chemistry, Jagiellonian University, Cracow, Poland; Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), Cracow, Poland
| | - Tytus Bernas
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, USA
| | - Agnieszka Dobrzyn
- Laboratory of Cell Signaling and Metabolic Disorders, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.
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Tatsumi K, Ichino T, Isaka N, Sugiyama A, Moriyoshi E, Okazaki Y, Higashi Y, Kajikawa M, Tsuji Y, Fukuzawa H, Toyooka K, Sato M, Ichi I, Shimomura K, Ohta H, Saito K, Yazaki K. Excretion of triacylglycerol as a matrix lipid facilitating apoplastic accumulation of a lipophilic metabolite shikonin. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:104-117. [PMID: 36223279 DOI: 10.1093/jxb/erac405] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Plants produce a large variety of lipophilic metabolites, many of which are secreted by cells and accumulated in apoplasts. These compounds often play a role to protect plants from environmental stresses. However, little is known about how these lipophilic compounds are secreted into apoplastic spaces. In this study, we used shikonin-producing cultured cells of Lithospermum erythrorhizon as an experimental model system to analyze the secretion of lipophilic metabolites, taking advantage of its high production rate and the clear inducibility in culture. Shikonin derivatives are lipophilic red naphthoquinone compounds that accumulate exclusively in apoplastic spaces of these cells and also in the root epidermis of intact plants. Microscopic analysis showed that shikonin is accumulated in the form of numerous particles on the cell wall. Lipidomic analysis showed that L. erythrorhizon cultured cells secrete an appreciable portion of triacylglycerol (24-38% of total triacylglycerol), composed predominantly of saturated fatty acids. Moreover, in vitro reconstitution assay showed that triacylglycerol encapsulates shikonin derivatives with phospholipids to form lipid droplet-like structures. These findings suggest a novel role for triacylglycerol as a matrix lipid, a molecular component involved in the secretion of specialized lipophilic metabolites.
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Affiliation(s)
- Kanade Tatsumi
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan
| | - Takuji Ichino
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan
| | - Natsumi Isaka
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan
| | - Eiko Moriyoshi
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan
| | - Yozo Okazaki
- RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan
| | - Yasuhiro Higashi
- RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan
| | - Masataka Kajikawa
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan
| | - Yoshinori Tsuji
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan
| | - Hideya Fukuzawa
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan
| | - Kiminori Toyooka
- RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan
| | - Mayuko Sato
- RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan
| | - Ikuyo Ichi
- Institute for Human Life Innovation, Ochanomizu University, Tokyo 112-8610, Japan
| | - Koichiro Shimomura
- Graduate School of Life Sciences, Toyo University, Gunma, 374-0193, Japan
| | - Hiroyuki Ohta
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, 226-8501, Japan
| | - Kazuki Saito
- RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan
- Plant Molecular Science Center, Chiba University, Chiba, 260-8675, Japan
| | - Kazufumi Yazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan
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Yoda T. Direct Observation of Cell‐sized Liposomes Containing a Functional Polyphenol Procyanidin B2 from Apple. ChemistrySelect 2022. [DOI: 10.1002/slct.202201808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tsuyoshi Yoda
- Hirosaki Industrial Research Institute Aomori Prefectural Industrial Technology Research Center 1-1-8 Ougi-machi Hirosaki City, Aomori 036-8104 Japan
- Hachinohe Industrial Research Institute Aomori Prefectural Industrial Technology Research Center 1-4-43 Kita-inter-kogyodanchi Hachinohe City, Aomori 039-2245 Japan
- The United Graduate School of Agricultural Sciences Iwate University 3-18-8, Ueda Morioka City, Iwate 020-8550 Japan
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Patsenker E, Thangapandi VR, Knittelfelder O, Palladini A, Hefti M, Beil-Wagner J, Rogler G, Buch T, Shevchenko A, Hampe J, Stickel F. The Pnpla3 Variant I148M Reveals Protective Effects Towards Hepatocellular Carcinoma in Mice via Restoration of Omega-3 Polyunsaturated Fats. J Nutr Biochem 2022; 108:109081. [PMID: 35691594 DOI: 10.1016/j.jnutbio.2022.109081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 02/02/2022] [Accepted: 05/03/2022] [Indexed: 12/02/2022]
Abstract
Alcohol consumption and high caloric diet are leading causes of progressive fatty liver disease. Genetic variant rs738409 in patatin-like phospholipase domain-containing protein 3 (PNPLA3 rs738409 C>G) has been repeatedly described as one of the major risk loci for alcoholic liver cirrhosis (ALC) and hepatocellular carcinoma (HCC) in humans, however, the mechanism behind this association is incompletely understood. We generated mice carrying the rs738409 variant (PNPLA3 I148M) in order to detect genotype-phenotype relationships in mice upon chow and alcohol-high fat/high sugar diet (EtOH/WD). We could clearly demonstrate that the presence of rs738409 per se is sufficient to induce spontaneous development of steatosis after one year in mice on a chow diet, whereas in the setting of unhealthy diet feeding, PNPLA3 I148M did not affect hepatic inflammation or fibrosis, but induced a striking lipid remodelling, microvesicular steatosis and protected from HCC formation. Using shot gun lipidomics, we detected a striking restoration of reduced long chain-polyunsaturated fatty acids (LC-PUFA)-containing TGs, docosapentaenoic acid (C22:5 n3) and omega-3-derived eicosanoids (5-HEPE, 20-HEPE, 19,20-EDP, 21-HDHA) in PNPLA3 I148M mice upon EtOH/WD. At the molecular level, PNPLA3 I148M modulated enzymes for fatty acid and TG transport and metabolism. These findings suggest (dietary) lipids as an important and independent driver of hepatic tumorigenesis. Genetic variant in PNPLA3 exerted protective effects in mice, conflicting with findings in humans. Species-related differences in physiology and metabolism should be taken into account when modelling unhealthy human lifestyle, as genetic mouse models may not always allow for translation of insight gained in humans.
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Affiliation(s)
- Eleonora Patsenker
- Department of Gastroenterology and Hepatology, University of Zurich, 8091 Zurich, Switzerland.
| | - Veera Raghavan Thangapandi
- Department of Gastroenterology and Hepatology, Universitätsklinikum Dresden, 01304 Dresden, Germany; Center for Regenerative Therapies, TU Dresden, 01307 Dresden, Germany
| | - Oskar Knittelfelder
- Max Plank Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Alessandra Palladini
- Paul Langerhans Institute Dresden of the Helmholtz Zentrum München at the University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany; German Center for Diabetes Research, 85764 Neuherberg, Germany
| | - Michaela Hefti
- Department of Gastroenterology and Hepatology, University of Zurich, 8091 Zurich, Switzerland
| | - Jane Beil-Wagner
- Institute of Laboratory Animal Science, University of Zurich, 8952 Schlieren, Switzerland
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University of Zurich, 8091 Zurich, Switzerland
| | - Thorsten Buch
- Institute of Laboratory Animal Science, University of Zurich, 8952 Schlieren, Switzerland
| | - Andrej Shevchenko
- Max Plank Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Jochen Hampe
- Department of Gastroenterology and Hepatology, Universitätsklinikum Dresden, 01304 Dresden, Germany; Center for Regenerative Therapies, TU Dresden, 01307 Dresden, Germany
| | - Felix Stickel
- Department of Gastroenterology and Hepatology, University of Zurich, 8091 Zurich, Switzerland
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Kalugina OV, Mikhailova TA, Afanasyeva LV, Gurina VV, Ivanova MV. Changes in the fatty acid composition of pine needle lipids under the aluminum smelter emissions. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:2083-2095. [PMID: 34546442 DOI: 10.1007/s10646-021-02479-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
Changes in the fatty acid (FA) composition of total lipids of Pinus sylvestris needles at different pollution levels caused by emissions from a large aluminum smelter (BrAS) have been studied. In the needles of trees from unpolluted (background) territories, the FA spectrum is represented by 24 acids with prevalence of unsaturated FAs (71.6%). The main unsaturated FA are represented by oleic (C18: 1ω9), linoleic (C18: 2ω6), and α-linolenic (C18: 3ω3) acids. Under the influence of BrAS emissions, the total amount of identified FAs in the needles and the proportion of unsaturated FAs decrease, while the fraction of saturated FAs, on the contrary, increases from 25.4% in unpolluted needles to 33.2% in polluted ones. The content of palmitic FA (C16:0) in the needles exceeds background values by 1.5 times, behenic acid (C22:0) - by 1.6-2.5 times, arachidic acid (C20:0) - by 1.5 times, palmitic margaric acid (C17:0) - by 1.5-2.3 times. These FAs play the important role in the protection of plant membranes from the effects of abiotic stress factors, making them less permeable. The sum of short-chain saturated FAs (C12:0, C14:0, C15:0) increase by 4.8 times in needles of trees that are highly polluted. Pentadecanoic (C15:0) acid is found in the needles only in the background areas and at the low pollution level. With a more severe pollution, C15:0 is not identified, but lauric acid with the cis-configuration of double bonds in the structure (izo-C12:0) appears. The presence of "relict" ∆5-polymethylene FAs in the composition of pine needle membrane lipids is determined. In the background areas, they account for 12.9% of the total FAs. With the industrial pollution intensification, their total content increases and reaches 14.1%. ∆5-polymethylene FAs are also able to protect membranes against negative influences. Thus, changes in the quantitative and qualitative FA composition of pine needle total lipids indicate the activation of the stabilization mechanisms of membrane lipids due to their tight packing in a bilayer. It is one of the adaptive reactions of Pinus sylvestris in response to the impact of the aluminum industry emissions.
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Affiliation(s)
- Olga Vladimirovna Kalugina
- The Natural and Anthropogenic Ecosystems Laboratory, Siberian Institute of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, Lermontov str., 132, 664033, Irkutsk, Russia
| | - Tatiana Alekseevna Mikhailova
- The Natural and Anthropogenic Ecosystems Laboratory, Siberian Institute of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, Lermontov str., 132, 664033, Irkutsk, Russia
| | - Larisa Vladimirovna Afanasyeva
- Laboratory of Floristics and Geobotany, Institute of General and Experimental Biology Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Russia, 6, Sakhyanova str., 670047, Ulan-Ude, Russia.
| | - Veronika Valerievna Gurina
- Laboratory of Plant Cell Physiology, Siberian Instititue of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, Lermontov str., 132, 664033, Irkutsk, Russia
| | - Maria Vladimirovna Ivanova
- Laboratory of Ecosystems Bioindication, Siberian Instititue of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, Lermontov str., 132, 664033, Irkutsk, Russia
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Design and synthesis of some new biologically active amidoalkyl naphthols in the presence of sulfonic acid functionalized silica-coated Fe3O4 nanoparticles. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04610-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Effects of isovaleraldehyde on cell-sized lipid bilayer vesicles. Biophys Chem 2021; 279:106698. [PMID: 34644672 DOI: 10.1016/j.bpc.2021.106698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 10/05/2021] [Indexed: 11/23/2022]
Abstract
Membrane composition and components are intrinsic properties of a cell membrane. Any changes in lipid vesicle composition or any stimuli, such as heat, that affect molecular packing induce dynamic shape change. Dynamic shape changes allow the determination of structural organization changes upon a change in the membrane internal or external environment. In this study, we report how thermal stress can affect isovaleraldehyde (IVA) flavor compound-containing membranes. We revealed that (1) IVA-containing lipid vesicles are large and their increasing size results in increasing IVA/vesicle concentration; (2) IVA-containing lipid vesicles are less thermo-responsive and are affected by increasing IVA concentration; finally, we discussed (3) the molecular mechanisms behind membrane packing. We proposed that the characteristic of IVA-containing membranes could be used in evaluating drink quality. Our results would potentially contribute to the development of membrane technology and the progress in further understanding physiological processes, such as flavor sensation.
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10
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Takeyama A, Teramoto A, Wang T, Hayashi T, Tanaka Y, Sato M, Shirouchi B. Dietary lysophospholipids reduce lymphatic cholesterol transport compared with dietary phospholipids in thoracic lymph-duct cannulated rats. Lipids 2021; 56:579-590. [PMID: 34409611 DOI: 10.1002/lipd.12319] [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: 05/14/2021] [Revised: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 11/06/2022]
Abstract
Dietary phospholipids have been traditionally known to affect micelle formation. Egg yolk-derived lysophospholipids (LysoPL) are commercially available. We investigated the effects of dietary LysoPL on lymphatic lipid transport. We also compared sn-1 LysoPL and sn-2 LysoPL, which have different fatty acyl esterification positions. Thoracic lymph duct-cannulated rats were fed a diet supplemented with egg yolk-derived sn-1 LysoPL, sn-2 LysoPL, or phospholipids (PL). The amount of lymphatic lipid transport was also evaluated. Time courses of transport were applied to the one-compartment model as one of the pharmacokinetic analyses. The solubility of cholesterol in bile acid micelles was measured. Compared to the PL diet, the sn-1 and sn-2 LysoPL diets significantly reduced the lymphatic transport of cholesterol. There were no differences in the lymphatic PL and TAG transport. There was no difference in cholesterol transport between the sn-1 LysoPL group and the sn-2 LysoPL group; however, the transport rate constant at a decrease in lymphatic cholesterol was lower in the sn-1 LysoPL group than in the sn-2 LysoPL group. Cholesterol solubility in bile acid micelles was significantly decreased in the sn-1 LysoPL and sn-2 LysoPL groups compared to that in the PL group. Dietary LysoPL affects the behavior of intestinal cholesterol and suppresses lymphatic cholesterol transport.
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Affiliation(s)
- Ai Takeyama
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Asami Teramoto
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Tianyu Wang
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Takuya Hayashi
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Yasutake Tanaka
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Masao Sato
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Bungo Shirouchi
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan.,Laboratory of Nutrition Chemistry, Department of Nutrition Science, Faculty of Nursing and Nutrition, University of Nagasaki, Nishi-Sonogi-gun, Nagasaki, Japan
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11
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Lange M, Wagner PV, Fedorova M. Lipid composition dictates the rate of lipid peroxidation in artificial lipid droplets. Free Radic Res 2021; 55:469-480. [PMID: 33866899 DOI: 10.1080/10715762.2021.1898603] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Cellular and organismal redox imbalance leading to the accumulation of reactive oxygen species significantly enhances lipid peroxidation (LPO). LPO is relatively well studied for phospholipid membranes and to some extent for circulating lipoproteins. However, it is rarely addressed for intracellular lipid droplets (LDs). Here we optimized an in vitro model system to investigate oxidizability of different lipid classes within artificial LDs (aLDs). To this end, aLDs were reconstructed using differential centrifugation and characterized by a variety of analytical methods. Influence of different lipid compositions on aLDs size was studied and showed opposing effects of unsaturated phospholipids (PLs), triacyclglycerols (TAGs) and cholesteryl esters (CEs). To address aLDs oxidizability, the LPO sensitive ratiometric probe BODIPY-C11 was infused into aLDs, and lipid peroxidation kinetics, upon LPO activation either by copper/ascorbate or 2,2'-azobis(2-methylpropionamidine), was followed up by fluorescence spectroscopy. Generated lipid peroxidation products were additionally identified and relatively quantified by high-resolution LC-MS/MS. It was demonstrated that lipid composition is detrimental to aLD's oxidation sensitivity. Increasing unsaturation levels in the PL monolayer or the TAG core increases oxidation sensitivity, whereas the presence of CEs in the LD core has a dual effect depending on the acylated fatty acid. Moreover, not only the total level of lipid unsaturation, but also the ratio between different lipid species was shown to play a significant role in LPO propagation. This shows that the lipid composition of aLD's determines their sensitivity to LPO. As LDs lipidome reflects and is dynamically influenced by cellular and organismal metabolic status, our findings provide an important observation linking LD lipid composition and their redox sensitivity.
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Affiliation(s)
- Mike Lange
- Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Leipzig University, Leipzig, Germany.,Center for Biotechnology and Biomedicine, Leipzig University, Leipzig, Germany
| | - Pia Viktoria Wagner
- Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Leipzig University, Leipzig, Germany
| | - Maria Fedorova
- Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Leipzig University, Leipzig, Germany.,Center for Biotechnology and Biomedicine, Leipzig University, Leipzig, Germany
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12
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Yoda T, Saito T. Size of Cells and Physicochemical Properties of Membranes are Related to Flavor Production during Sake Brewing in the Yeast Saccharomyces cerevisiae. MEMBRANES 2020; 10:membranes10120440. [PMID: 33352892 PMCID: PMC7766171 DOI: 10.3390/membranes10120440] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/17/2022]
Abstract
Ethyl caproate (EC) and isoamyl acetate (IA) are key flavor components of sake. Recently, attempts have been made to increase the content of good flavor components, such as EC and IA, in sake brewing. However, the functions of EC and IA in yeast cells remain poorly understood. Therefore, we investigated the effects of EC and IA using cell-sized lipid vesicles. We also investigated lipid vesicles containing EC and/or caproic acid (CA) as well as IA and/or isoamyl alcohol (IAA). CA and IAA are precursors of EC and IA, respectively, and are important flavors in sake brewing. The size of a vesicle is influenced by flavor compounds and their precursors in a concentration-dependent manner. We aimed to establish the conditions in which the vesicles contained more flavors simultaneously and with different ratios. Interestingly, vesicles were largest in a mixture of 50% of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) with 25% EC and 25% CA or a mixture of 50% DOPC with 25% IA and 25% IAA. The impact of flavor additives on membrane fluidity was also studied using Laurdan generalized polarization. During the production process, flavors may regulate the fluidity of lipid membranes.
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Affiliation(s)
- Tsuyoshi Yoda
- Aomori Prefectural Industrial Technology Research Center, Hirosaki Industrial Research Institute, 1-1-8 Ougi-machi, Hirosaki, Aomori 036-8104, Japan;
- The United Graduate School of Agricultural Sciences, Iwate University, 3-18-8, Ueda, Morioka 020-8550, Japan
- Correspondence: ; Tel.: +81-172-55-6740
| | - Tomoaki Saito
- Aomori Prefectural Industrial Technology Research Center, Hirosaki Industrial Research Institute, 1-1-8 Ougi-machi, Hirosaki, Aomori 036-8104, Japan;
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Milk fat globule size development in the mammary epithelial cell: a potential role for ether phosphatidylethanolamine. Sci Rep 2020; 10:12299. [PMID: 32704146 PMCID: PMC7378170 DOI: 10.1038/s41598-020-69036-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 07/01/2020] [Indexed: 11/12/2022] Open
Abstract
Milk fat globule (MFG) size is a milk production trait characteristic to the individual animal and has important effects on the functional and nutritional properties of milk. Although the regulation of MFG size in the mammary epithelial cell is not fully understood, lipid droplet (LD) fusion prior to secretion is believed to play a role. We selected cows that consistently produced milk with predominantly small or large MFGs to compare their lipidomic profiles, with focus on the polar lipid fraction. The polar lipid composition of the monolayer surrounding the LD is believed to either promote or prevent LD fusion. Using a targeted LC–MS/MS approach we studied the relative abundance of 301 detected species and found significant differences between the studied groups. Here we show that the lipidomic profile of milk from small MFG cows is characterised by higher phosphatidylcholine to phosphatidylethanolamine ratios. In contrast, the milk from large MFG cows contained more ether-phosphatidylethanolamine species. This is the first time that a potential role for ether-phosphatidylethanolamine in MFG size development has been suggested.
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Cloos AS, Ghodsi M, Stommen A, Vanderroost J, Dauguet N, Pollet H, D'Auria L, Mignolet E, Larondelle Y, Terrasi R, Muccioli GG, Van Der Smissen P, Tyteca D. Interplay Between Plasma Membrane Lipid Alteration, Oxidative Stress and Calcium-Based Mechanism for Extracellular Vesicle Biogenesis From Erythrocytes During Blood Storage. Front Physiol 2020; 11:712. [PMID: 32719614 PMCID: PMC7350142 DOI: 10.3389/fphys.2020.00712] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 05/29/2020] [Indexed: 12/18/2022] Open
Abstract
The shedding of extracellular vesicles (EVs) from the red blood cell (RBC) surface is observed during senescence in vivo and RBC storage in vitro. Two main models for EV shedding, respectively based on calcium rise and oxidative stress, have been proposed in the literature but the role of the plasma membrane lipid composition and properties is not understood. Using blood in K+/EDTA tubes stored for up to 4 weeks at 4°C as a relevant RBC vesiculation model, we showed here that the RBC plasma membrane lipid composition, organization in domains and biophysical properties were progressively modified during storage and contributed to the RBC vesiculation. First, the membrane content in cholesterol and linoleic acid decreased whereas lipid peroxidation and spectrin:membrane occupancy increased, all compatible with higher membrane rigidity. Second, phosphatidylserine surface exposure showed a first rapid rise due to membrane cholesterol decrease, followed by a second calcium-dependent increase. Third, lipid domains mainly enriched in GM1 or sphingomyelin strongly increased from the 1st week while those mainly enriched in cholesterol or ceramide decreased during the 1st and 4th week, respectively. Fourth, the plasmatic acid sphingomyelinase activity considerably increased upon storage following the sphingomyelin-enriched domain rise and potentially inducing the loss of ceramide-enriched domains. Fifth, in support of the shedding of cholesterol- and ceramide-enriched domains from the RBC surface, the number of cholesterol-enriched domains lost and the abundance of EVs released during the 1st week perfectly matched. Moreover, RBC-derived EVs were enriched in ceramide at the 4th week but depleted in sphingomyelin. Then, using K+/EDTA tubes supplemented with glucose to longer preserve the ATP content, we better defined the sequence of events. Altogether, we showed that EV shedding from lipid domains only represents part of the global vesiculation mechanistics, for which we propose four successive events (cholesterol domain decrease, oxidative stress, sphingomyelin/sphingomyelinase/ceramide/calcium alteration and phosphatidylserine exposure).
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Affiliation(s)
- Anne-Sophie Cloos
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Marine Ghodsi
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Amaury Stommen
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Juliette Vanderroost
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Nicolas Dauguet
- GECE Unit and CYTF Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Hélène Pollet
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Ludovic D'Auria
- NCHM Unit, Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Eric Mignolet
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Yvan Larondelle
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Romano Terrasi
- Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Giulio G Muccioli
- Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Patrick Van Der Smissen
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Donatienne Tyteca
- CELL Unit and PICT Platform, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
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15
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Rocha VPC, Dacher M, Young SA, Kolokousi F, Efstathiou A, Späth GF, Soares MBP, Smirlis D. Leishmania dual-specificity tyrosine-regulated kinase 1 (DYRK1) is required for sustaining Leishmania stationary phase phenotype. Mol Microbiol 2020; 113:983-1002. [PMID: 31975452 DOI: 10.1111/mmi.14464] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 01/13/2020] [Accepted: 01/16/2020] [Indexed: 01/05/2023]
Abstract
Although the multiplicative and growth-arrested states play key roles in Leishmania development, the regulators of these transitions are largely unknown. In an attempt to gain a better understanding of these processes, we characterised one member of a family of protein kinases with dual specificity, LinDYRK1, which acts as a stasis regulator in other organisms. LinDYRK1 overexpressing parasites displayed a decrease in proliferation and in cell cycle re-entry of arrested cells. Parasites lacking LinDYRK1 displayed distinct fitness phenotypes in logarithmic and stationary growth phases. In logarithmic growth phase, LinDYRK1-/- parasites proliferated better than control lines, supporting a role of this kinase in stasis, while in stationary growth phase, LinDYRK1-/- parasites had important defects as they rounded up, accumulated vacuoles and lipid bodies and displayed subtle but consistent differences in lipid composition. Moreover, they expressed less metacyclic-enriched transcripts, displayed increased sensitivity to complement lysis and a significant reduction in survival within peritoneal macrophages. The distinct LinDYRK1-/- growth phase phenotypes were mirrored by the distinct LinDYRK1 localisations in logarithmic (mainly in flagellar pocket area and endosomes) and late stationary phase (mitochondrion). Overall, this work provides first evidence for the role of a DYRK family member in sustaining promastigote stationary phase phenotype and infectivity.
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Affiliation(s)
- Vinícius Pinto Costa Rocha
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Brazil
- Centro de Biotecnologia e Terapia Celular, Hospital São Rafael, Salvador, Brazil
| | - Mariko Dacher
- Unité de Parasitologie Moléculaire et Signalisation, Department of Parasites and Insect Vectors, Institut Pasteur and INSERM U1201, Paris, France
| | - Simon Alan Young
- Biomedical Sciences Research Complex, School of Biology, The University of St. Andrews, St. Andrews, UK
| | - Foteini Kolokousi
- Molecular Parasitology Laboratory, Microbiology Department, Hellenic Pasteur Institute, Athens, Greece
| | - Antonia Efstathiou
- Molecular Parasitology Laboratory, Microbiology Department, Hellenic Pasteur Institute, Athens, Greece
| | - Gerald Frank Späth
- Unité de Parasitologie Moléculaire et Signalisation, Department of Parasites and Insect Vectors, Institut Pasteur and INSERM U1201, Paris, France
| | - Milena Botelho Pereira Soares
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Brazil
- Centro de Biotecnologia e Terapia Celular, Hospital São Rafael, Salvador, Brazil
| | - Despina Smirlis
- Molecular Parasitology Laboratory, Microbiology Department, Hellenic Pasteur Institute, Athens, Greece
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Zhang L, Ding L, Shi H, Wang C, Xue C, Zhang T, Wang Y. Eicosapentaenoic acid-enriched phospholipids suppressed lipid accumulation by specific inhibition of lipid droplet-associated protein FSP27 in mice. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:2244-2251. [PMID: 31919850 DOI: 10.1002/jsfa.10250] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 11/22/2019] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Sea cucumber is a rich source of eicosapentaenoic acid in the form of eicosapentaenoic acid-enriched phospholipids (EPA-PL). It is known to be efficacious in preventing obesity. However, few studies have focused on the role of EPA-PL in inhibiting lipid accumulation by lipid droplets (LDs). This study first investigated the effect of EPA-PL from sea cucumber on the formation of LDs and the underlying mechanism in C57BL/6J mice. The mice were randomly divided into two groups and treated for 8 weeks or 3, 7, and 14 days with either (i) a high-sucrose diet (model group), (ii) a high-sucrose diet plus 2% EPA-PL (EPA-PL group). RESULTS Eight-week EPA-PL supplementation significantly reduced lipid accumulation and LD size in liver and white adipose tissue (WAT), which was accompanied by the decreased expression of LDs-associated protein FSP27. A 3-day EPA-PL treatment suppressed the mRNA expression of Fsp27. The mRNA level of Fsp27 reached its 'normal level' after withdrawing EPA-PL for 7 days, suggesting that EPA-PL might serve as a rapid regulator of FSP27. Furthermore, EPA-PL increased the expression of lipolysis genes Hsl and Atgl accompanied by the regulation of Pparγ in WAT. CONCLUSIONS Dietary EPA-PL from sea cucumber (Cucumaria frondosa) protected against lipid accumulation by regulating LDs-associated protein FSP27, which might provide novel evidence for the anti-obesity action of EPA-PL. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Lingyu Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Lin Ding
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Haohao Shi
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Chengcheng Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Laboratory of Marine Drugs & Biological Products, Qingdao, China
| | - Tiantian Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Yuming Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Laboratory of Marine Drugs & Biological Products, Qingdao, China
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Boonanuntanasarn S, Nakharuthai C, Schrama D, Duangkaew R, Rodrigues PM. Effects of dietary lipid sources on hepatic nutritive contents, fatty acid composition and proteome of Nile tilapia (Oreochromis niloticus). J Proteomics 2019; 192:208-222. [DOI: 10.1016/j.jprot.2018.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/05/2018] [Accepted: 09/03/2018] [Indexed: 01/09/2023]
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18
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Levchenko SM, Qu J. Biomolecular Component Analysis of Phospholipids Composition in Live HeLa Cells. BIOSENSORS-BASEL 2018; 8:bios8040123. [PMID: 30563051 PMCID: PMC6315881 DOI: 10.3390/bios8040123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/30/2018] [Accepted: 12/03/2018] [Indexed: 12/19/2022]
Abstract
The alteration of the phospholipid composition within the cell, in particular the ratio between saturated and unsaturated fatty acids, can serve as an important biomarker to prognosis of the disease progression (e.g., fatty-liver disease, prostate cancer, or neurodegenerative disorders). Major techniques for lipid analysis in biological samples require a lipid extraction procedure that is not compatible with live cell studies. To address this challenge, we apply microRaman-Biomolecular Component Analysis (BCA) for comparative analysis of phospholipid composition and sensing the saturation degree of fatty acid lipid chain in live HeLa cells and lipids extracted from HeLa cells. After processing raw Raman data, acquired in lipid droplets (LDs) free cytoplasmic area, LDs and extracted lipids with BCA, the lipid component was isolated. Despite the similarity in general profiles of processed Raman spectra acquired in live cells and extracted lipids, some clear differences that reflect diversity in their phospholipids composition were revealed. Furthermore, using the direct relation between the number of double bonds in the fatty acid chain and the intensity ratio of the corresponding Raman bands, the saturation degree of fatty acids was estimated.
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Affiliation(s)
- Svitlana M Levchenko
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Junle Qu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
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Li C, Lu Q, Ye J, Qin H, Long Y, Wang L, Ou H. Metabolic and proteomic mechanism of bisphenol A degradation by Bacillus thuringiensis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 640-641:714-725. [PMID: 29879660 DOI: 10.1016/j.scitotenv.2018.05.352] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 05/10/2018] [Accepted: 05/28/2018] [Indexed: 06/08/2023]
Abstract
Bisphenol A (BPA) is a worldwide, widespread pollutant with estrogen mimicking and hormone-like properties. To date, some target biomolecules associated with BPA toxicity have been confirmed. The limited information has not clarified the related metabolism at the pathway and network levels. To this end, metabolic and proteomic approaches were performed to reveal the synthesis of phospholipids and proteins and the metabolic network during the BPA degradation process. The results showed that the degradation efficiency of 1 μM of BPA by 1 g L-1 of Bacillus thuringiensis was up to 85% after 24 h. During this process, BPA significantly changed the membrane permeability; altered sporulation, amino acid and protein expression, and carbon, purine, pyrimidine and fatty acid metabolism; enhanced C14:0, C16:1ω7, C18:2ω6, C18:1ω9t and C18:0 synthesis; and increased the trans/cis ratio of C18:1ω9t/C18:1ω9c. It also depressed the spore DNA stability of B. thuringiensis. Among the 14 upregulated and 7 down-regulated proteins, SasP-1 could be a biomarker to reflect BPA-triggered spore DNA impairment. TpiA, RpoA, GlnA and InfA could be phosphorylated at the active sites of serine and tyrosine. The findings presented novel insights into the interaction among BPA stress, BPA degradation, phospholipid synthesis and protein expression at the network and phylogenetic levels.
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Affiliation(s)
- Chongshu Li
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, Guangdong, China
| | - Qiying Lu
- College of Biology and Food Engineering, Guangdong University of Education, Guangzhou 510303, Guangdong, China
| | - Jinshao Ye
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, Guangdong, China.
| | - Huaming Qin
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, Guangdong, China
| | - Yan Long
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, Guangdong, China
| | - Lili Wang
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, Guangdong, China
| | - Huase Ou
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, Guangdong, China
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Lee J, Ridgway ND. Phosphatidylcholine synthesis regulates triglyceride storage and chylomicron secretion by Caco2 cells. J Lipid Res 2018; 59:1940-1950. [PMID: 30115754 DOI: 10.1194/jlr.m087635] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/09/2018] [Indexed: 11/20/2022] Open
Abstract
Intracellular lipid droplets (LDs) supply fatty acids for energy, membrane biogenesis, and lipoprotein secretion. The surface monolayer of LDs is composed of phospholipids, primarily phosphatidylcholine (PC), that stabilize the neutral lipid core of triglyceride (TG). To determine the relationship between PC synthesis and TG storage and secretion in chylomicrons, we used a model of intestinal-derived human epithelial colorectal adenocarcinoma (Caco2) cells with knockout of PCYT1A, which encodes the rate-limiting enzyme CTP:phosphocholine cytidylyltransferase (CCT)α in the CDP-choline pathway, that were treated with the fatty acid oleate. CRISPR/Cas9 knockout of CCTα in Caco2 cells (Caco2-KO cells) reduced PC synthesis by 50%. Compared with Caco2 cells, Caco2-KO cells exposed to oleate had fewer and larger LDs and greater TG accumulation as a result. The addition of exogenous lysophosphatidylcholine to Caco2-KO cells reversed the LD morphology defect. Caco2-KO cells, differentiated into epithelial monolayers, accumulated intracellular TG and had deficient TG and chylomicron-associated apoB48 secretion; apoB100 secretion was unaffected by CCTα knockout or oleate. Metabolic-labeling and LD imaging of Caco2-KO cells indicated preferential shuttling of de novo synthesized TG into larger LDs rather than into chylomicrons. Thus, reduced de novo PC synthesis in Caco2 cells enhances TG storage in large LDs and inhibits apoB48 chylomicron secretion.
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Affiliation(s)
- Jonghwa Lee
- Atlantic Research Center, Departments of Pediatrics, and Biochemistry and Molecular Biology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Neale D Ridgway
- Atlantic Research Center, Departments of Pediatrics, and Biochemistry and Molecular Biology, Dalhousie University, Halifax, Nova Scotia, Canada
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Schmölz L, Schubert M, Kirschner J, Kluge S, Galli F, Birringer M, Wallert M, Lorkowski S. Long-chain metabolites of vitamin E: Interference with lipotoxicity via lipid droplet associated protein PLIN2. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:919-927. [DOI: 10.1016/j.bbalip.2018.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 04/17/2018] [Accepted: 05/03/2018] [Indexed: 01/25/2023]
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