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Papin M, Fontaine D, Goupille C, Figiel S, Domingo I, Pinault M, Guimaraes C, Guyon N, Cartron PF, Emond P, Lefevre A, Gueguinou M, Crottès D, Jaffrès PA, Ouldamer L, Maheo K, Fromont G, Potier-Cartereau M, Bougnoux P, Chantôme A, Vandier C. Endogenous ether-lipids differentially promote tumour aggressiveness by regulating the SK3 channel. J Lipid Res 2024:100544. [PMID: 38642894 DOI: 10.1016/j.jlr.2024.100544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 04/11/2024] [Accepted: 04/13/2024] [Indexed: 04/22/2024] Open
Abstract
SK3 channels are potassium channels found to promote tumour aggressiveness. We have previously demonstrated that SK3 is regulated by synthetic ether-lipids, but the role of endogenous ether lipids is unknown. Here, we have studied the role of endogenous alkyl- and alkenyl-ether-lipids on SK3 channels and on the biology of cancer cells. Experiments revealed that the suppression of AGPS or PEDS1, which are key enzymes for alkyl- and alkenyl-ether-lipid synthesis, respectively, decreased SK3 expression by increasing miR-499 and miR-208 expression, leading to a decrease in SK3-dependent calcium entry, cell migration, and MMP9-dependent cell adhesion and invasion. We identified several ether-lipids that promoted SK3 expression and found a differential role of alkyl- and alkenyl-ether-lipids on SK3 activity. The expressions of AGPS, SK3, and miR were associated in clinical samples emphasising the clinical consistency of our observations. To our knowledge, this is the first report showing that ether-lipids differentially control tumour aggressiveness by regulating an ion channel. This insight provides new possibilities for therapeutic interventions, offering clinicians an opportunity to manipulate ion channel dysfunction by adjusting the composition of ether-lipids.
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Affiliation(s)
- Marion Papin
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Delphine Fontaine
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Caroline Goupille
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France; Department of Gynecology, CHRU Bretonneau, Tours, France
| | - Sandy Figiel
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Isabelle Domingo
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Michelle Pinault
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - C Guimaraes
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Nina Guyon
- CRCINA-INSERM 1232, Equipe « Apoptose et Progression tumorale », Nantes, France
| | | | - Patrick Emond
- iBrain, UMR 1253, Université de Tours, INSERM Tours, France; Nuclear medicine in vitro department, CHRU Bretonneau, Tours, France
| | | | - Maxime Gueguinou
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - David Crottès
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Paul-Alain Jaffrès
- Laboratoire Chimie Electrochimie Moléculaires et Chimie Analytique (CEMCA), UMR 6521, University of Brest, CNRS, Brest, France
| | - Lobna Ouldamer
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France; Department of Gynecology, CHRU Bretonneau, Tours, France
| | - Karine Maheo
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Gaëlle Fromont
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France; Department of Pathology, CHRU Bretonneau, Tours, France
| | - Marie Potier-Cartereau
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Philippe Bougnoux
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Aurélie Chantôme
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France
| | - Christophe Vandier
- Niche, Nutrition, Cancer & Oxidative metabolism (N2COx) UMR 1069, University of Tours, INSERM, Tours, France.
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Cancel M, Crottes D, Bellanger D, Bruyère F, Mousset C, Pinault M, Mahéo K, Fromont G. Variable effects of periprostatic adipose tissue on prostate cancer cells: Role of adipose tissue lipid composition and cancer cells related factors. Prostate 2024; 84:358-367. [PMID: 38112233 DOI: 10.1002/pros.24655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/28/2023] [Accepted: 12/05/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND Periprostatic adipose tissue (PPAT) is likely to modulate prostate cancer (PCa) progression. We analyzed the variations in the effect of PPAT on cancer cells, according to its fatty acid (FA) composition and tumor characteristics. METHODS The expression of markers of aggressiveness Ki67 and Zeb1, and epigenetic marks that could be modified during PCa progression, was analyzed by immunohistochemistry on a tissue-micro-array containing 59 pT3 PCa, including intra-prostatic areas and extra-prostatic foci in contact with PPAT belonging to the same tumor. In addition, we cocultivated PC3 and LNCaP cell lines with PPAT, which were then analyzed for FA composition. RESULTS Although the contact between PPAT and cancer cells led overall to an increase in Ki67 and Zeb1, and a decrease in the epigenetic marks 5MC, 5HMC, and H3K27ac, these effects were highly heterogeneous. Increased proliferation in extra-prostatic areas was associated with the international society of uropathology score. PC3 and LNCaP cocultures with PPAT led to increased Ki67, Zeb1 and H3K27me3, but only for PPAT associated with aggressive PCa. PC3 proliferation was correlated with high 20.2 n-6 and low 20.5n-3 in PPAT. CONCLUSIONS These results suggest that the effects of PPAT on cancer cells may depend on both PCa characteristics and PPAT composition, and could lead to propose nutritional supplementation.
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Affiliation(s)
- Mathilde Cancel
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
- Department of Medical Oncology, CHU Tours, Tours, France
| | - David Crottes
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
| | - Dorine Bellanger
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
| | | | - Coralie Mousset
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
- Department of Pathology, CHU Tours, Tours, France
| | - Michelle Pinault
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
| | - Karine Mahéo
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
| | - Gaëlle Fromont
- Faculté de Médecine, Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Tours, France
- Department of Pathology, CHU Tours, Tours, France
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Papin M, Guimaraes C, Pierre-Aue B, Fontaine D, Pardessus J, Couthon H, Fromont G, Mahéo K, Chantôme A, Vandier C, Pinault M. Development of a High-Performance Thin-Layer Chromatography Method for the Quantification of Alkyl Glycerolipids and Alkenyl Glycerolipids from Shark and Chimera Oils and Tissues. Mar Drugs 2022; 20:md20040270. [PMID: 35447943 PMCID: PMC9029064 DOI: 10.3390/md20040270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 04/14/2022] [Indexed: 02/04/2023] Open
Abstract
Ether lipids are composed of alkyl lipids with an ether bond at the sn-1 position of a glycerol backbone and alkenyl lipids, which possess a vinyl ether bond at the sn-1 position of the glycerol. These ether glycerolipids are present either as polar glycerophospholipids or neutral glycerolipids. Before studying the biological role of molecular species of ether glycerolipids, there is a need to separate and quantify total alkyl and alkenyl glycerolipids from biological samples in order to determine any variation depending on tissue or physiopathological conditions. Here, we detail the development of the first high-performance thin-layer chromatography method for the quantification of total alkyl and alkenyl glycerolipids thanks to the separation of their corresponding alkyl and alkenyl glycerols. This method starts with a reduction of all lipids after extraction, resulting in the reduction of neutral and polar ether glycerolipids into alkyl and alkenyl glycerols, followed by an appropriate purification and, finally, the linearly ascending development of alkyl and alkenyl glycerols on high-performance thin-layer chromatography plates, staining, carbonization and densitometric analysis. Calibration curves were obtained with commercial alkyl and alkenyl glycerol standards, enabling the quantification of alkyl and alkenyl glycerols in samples and thus directly obtaining the quantity of alkyl and alkenyl lipids present in the samples. Interestingly, we found a differential quantity of these lipids in shark liver oil compared to chimera. We quantified alkyl and alkenyl glycerolipids in periprostatic adipose tissues from human prostate cancer and showed the feasibility of this method in other biological matrices (muscle, tumor).
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Affiliation(s)
- Marion Papin
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Cyrille Guimaraes
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Benoit Pierre-Aue
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Delphine Fontaine
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Jeoffrey Pardessus
- Centre d’Étude des Pathologies Respiratoires (CEPR)-U1100, University of Tours, INSERM, 37000 Tours, France;
| | - Hélène Couthon
- Laboratoire Chimie Electrochimie Moléculaires et Chimie Analytique (CEMCA) UMR 6521, University of Brest, CNRS, 29238 Brest, France;
| | - Gaëlle Fromont
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Karine Mahéo
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Aurélie Chantôme
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
| | - Christophe Vandier
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
- Correspondence: ; Tel.: +33-(0)2-4736-6024
| | - Michelle Pinault
- Nutrition, Croissance, Cancer (N2C) UMR 1069, University of Tours, INSERM, 37000 Tours, France; (M.P.); (C.G.); (B.P.-A.); (D.F.); (G.F.); (K.M.); (A.C.); (M.P.)
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Bellanger D, Dziagwa C, Guimaraes C, Pinault M, Dumas JF, Brisson L. Adipocytes Promote Breast Cancer Cell Survival and Migration through Autophagy Activation. Cancers (Basel) 2021; 13:cancers13153917. [PMID: 34359819 PMCID: PMC8345416 DOI: 10.3390/cancers13153917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/15/2021] [Accepted: 07/29/2021] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Breast tumours are in direct contact with the adipose tissue of the mammary gland. Although the interactions between breast cancer cells and adipocytes that secrete tumour-promoting factors are well known, the molecular mechanisms remain under investigation. The aim of our study was to understand whether and how adipocytes regulate a cell-recycling pathway in breast cancer cells—autophagy. We show that adipocytes promote autophagy in breast cancer cells through the acidification of lysosomes, leading to cancer cell survival in nutrient-deprived conditions and to cancer cell migration. In this study, we have identified a new mechanism, which can link adipose tissue with breast cancer progression. Abstract White adipose tissue interacts closely with breast cancers through the secretion of soluble factors such as cytokines, growth factors or fatty acids. However, the molecular mechanisms of these interactions and their roles in cancer progression remain poorly understood. In this study, we investigated the role of fatty acids in the cooperation between adipocytes and breast cancer cells using a co-culture model. We report that adipocytes increase autophagy in breast cancer cells through the acidification of lysosomes, leading to cancer cell survival in nutrient-deprived conditions and to cancer cell migration. Mechanistically, the disturbance of membrane phospholipid composition with a decrease in arachidonic acid content is responsible for autophagy activation in breast cancer cells induced by adipocytes. Therefore, autophagy might be a central cellular mechanism of white adipose tissue interactions with cancer cells and thus participate in cancer progression.
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Wils L, Leman-Loubière C, Bellin N, Clément-Larosière B, Pinault M, Chevalier S, Enguehard-Gueiffier C, Bodet C, Boudesocque-Delaye L. Natural deep eutectic solvent formulations for spirulina: Preparation, intensification, and skin impact. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102317] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Goupille C, Ouldamer L, Pinault M, Guimares C, Arbion F, Jourdan ML, Frank PG. Identification of a Positive Association between Mammary Adipose Cholesterol Content and Indicators of Breast Cancer Aggressiveness in a French Population. J Nutr 2021; 151:1119-1127. [PMID: 33831951 DOI: 10.1093/jn/nxaa432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/26/2020] [Accepted: 12/10/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Several studies have recently highlighted important roles for adipose tissue in cancer. However, few have examined adipose tissue cholesterol, and no study has been performed in breast adipose tissue associated with breast tumors. OBJECTIVES The present work was designed to determine if breast adipose tissue cholesterol from the tumor-surrounding area is associated with breast cancer aggressiveness. METHODS Between 2009 and 2011, 215 breast adipose tissue samples were collected at the Tours University Hospital (France) during surgery of women (aged 28-89 y) with invasive breast cancer. Associations of free cholesterol (FC), esterified cholesterol (EC), and total cholesterol (TC) amounts with clinical variables (age, BMI, and treated or untreated hypercholesterolemia) and tumor aggressiveness parameters [phenotype, grade, presence of inflammatory breast cancer (IBC), and multifocality] were tested using Student's t test and after ANOVA. RESULTS The predominant form of cholesterol in adipose tissue was FC, and 50% of patients had no detectable EC. The adipose tissue FC content (μg/mg total lipid) was 18% greater in patients >70 y old than in those 40-49 y old (P < 0.05) and the TC content tended to be 12% greater in untreated hypercholesterolemic patients than in normocholesterolemic patients (P = 0.06). Breast adipose cholesterol concentrations were increased in tissues obtained from patients with human-epidermal-growth-factor-receptor-2 (HER2) phenotype (+13% FC; P < 0.05 compared with luminal A), IBC (+15% FC; P = 0.06 compared with noninflammatory tumors), as well as with multifocal triple-negative tumors (+34% FC, P < 0.05; +30% TC, P < 0.05, compared with unifocal triple-negative tumors). Among patients with triple-negative tumors, hypercholesterolemia was significantly more common (P < 0.05) in patients with multifocal tumors (64%) than in patients with unifocal tumors (25%). CONCLUSIONS This study is the first of this magnitude that analyzes cholesterol concentrations in adipose tissue from female breast cancer patients. An increase in breast adipose tissue cholesterol content may contribute to breast cancer aggressiveness (HER2 phenotype, multifocality of triple-negative tumors, and IBC).
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Affiliation(s)
- Caroline Goupille
- CHRU de Tours, Hôpital Bretonneau, Service de Gynécologie, Tours, France.,Laboratoire "Nutrition, Growth and Cancer", Université de Tours, INSERM UMR1069, Tours, France
| | - Lobna Ouldamer
- CHRU de Tours, Hôpital Bretonneau, Service de Gynécologie, Tours, France.,Laboratoire "Nutrition, Growth and Cancer", Université de Tours, INSERM UMR1069, Tours, France
| | - Michelle Pinault
- Laboratoire "Nutrition, Growth and Cancer", Université de Tours, INSERM UMR1069, Tours, France
| | - Cyrille Guimares
- Laboratoire "Nutrition, Growth and Cancer", Université de Tours, INSERM UMR1069, Tours, France
| | - Flavie Arbion
- CHRU de Tours, Hôpital Bretonneau, Service de Pathologie, Tours, France
| | - Marie L Jourdan
- CHRU de Tours, Hôpital Bretonneau, Service de Gynécologie, Tours, France.,Laboratoire "Nutrition, Growth and Cancer", Université de Tours, INSERM UMR1069, Tours, France
| | - Philippe G Frank
- Laboratoire "Nutrition, Growth and Cancer", Université de Tours, INSERM UMR1069, Tours, France.,French Network for Nutrition and Cancer Research (NACRe network), France.,SGS France Life Services, Saint Benoît, France
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Vergès V, Dutilleul C, Godin B, Collet B, Lecureuil A, Rajjou L, Guimaraes C, Pinault M, Chevalier S, Giglioli-Guivarc’h N, Ducos E. Protein Farnesylation Takes Part in Arabidopsis Seed Development. Front Plant Sci 2021; 12:620325. [PMID: 33584774 PMCID: PMC7876099 DOI: 10.3389/fpls.2021.620325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 01/08/2021] [Indexed: 05/25/2023]
Abstract
Protein farnesylation is a post-translational modification regulated by the ERA1 (Enhanced Response to ABA 1) gene encoding the β-subunit of the protein farnesyltransferase in Arabidopsis. The era1 mutants have been described for over two decades and exhibit severe pleiotropic phenotypes, affecting vegetative and flower development. We further investigated the development and quality of era1 seeds. While the era1 ovary contains numerous ovules, the plant produces fewer seeds but larger and heavier, with higher protein contents and a modified fatty acid distribution. Furthermore, era1 pollen grains show lower germination rates and, at flower opening, the pistils are immature and the ovules require one additional day to complete the embryo sac. Hand pollinated flowers confirmed that pollination is a major obstacle to era1 seed phenotypes, and a near wild-type seed morphology was thus restored. Still, era1 seeds conserved peculiar storage protein contents and altered fatty acid distributions. The multiplicity of era1 phenotypes reflects the diversity of proteins targeted by the farnesyltransferase. Our work highlights the involvement of protein farnesylation in seed development and in the control of traits of agronomic interest.
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Affiliation(s)
- Valentin Vergès
- Biomolécules et Biotechnologies Végétales, Faculté de Pharmacie, Université de Tours, Tours, France
| | - Christelle Dutilleul
- Biomolécules et Biotechnologies Végétales, Faculté de Pharmacie, Université de Tours, Tours, France
| | - Béatrice Godin
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Boris Collet
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Alain Lecureuil
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Loïc Rajjou
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Cyrille Guimaraes
- Nutrition, Croissance et Cancer, INSERM UMR 1069, Université de Tours, Tours, France
| | - Michelle Pinault
- Nutrition, Croissance et Cancer, INSERM UMR 1069, Université de Tours, Tours, France
| | - Stéphane Chevalier
- Nutrition, Croissance et Cancer, INSERM UMR 1069, Université de Tours, Tours, France
| | | | - Eric Ducos
- Biomolécules et Biotechnologies Végétales, Faculté de Pharmacie, Université de Tours, Tours, France
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Pinault M, Guimaraes C, Ben Hassen C, Gutierrez-Pajares JL, Chevalier S, Goupille C, Bernard-Savary P, Frank PG. Development of a Novel High-Performance Thin Layer Chromatography-Based Method for the Simultaneous Quantification of Clinically Relevant Lipids from Cells and Tissue Extracts. Lipids 2020; 55:403-412. [PMID: 32424826 DOI: 10.1002/lipd.12245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 04/10/2020] [Accepted: 04/23/2020] [Indexed: 12/17/2022]
Abstract
Lipids such as cholesterol, triacylglycerols, and fatty acids play important roles in the regulation of cellular metabolism and cellular signaling pathways and, as a consequence, in the development of various diseases. It is therefore important to understand how their metabolism is regulated to better define the components involved in the development of various human diseases. In the present work, we describe the development and validation of a high-performance thin layer chromatography (HPTLC) method allowing the separation and quantification of free cholesterol, cholesteryl esters, nonesterified fatty acids, and triacylglycerols. This method will be of interest as the quantification of these lipids in one single assay is difficult to perform.
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Affiliation(s)
| | | | | | | | | | - Caroline Goupille
- INSERM N2C UMR1069, University of Tours, 37032 Tours, France.,Department of Gynecology, CHRU Hôpital Bretonneau, boulevard Tonnellé, 37044 Tours, France
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9
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Ben Hassen C, Gutierrez-Pajares JL, Guimaraes C, Guibon R, Pinault M, Fromont G, Frank PG. Apolipoprotein-mediated regulation of lipid metabolism induces distinctive effects in different types of breast cancer cells. Breast Cancer Res 2020; 22:38. [PMID: 32321558 PMCID: PMC7178965 DOI: 10.1186/s13058-020-01276-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 04/07/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The highest incidence of breast cancer is in the Western world. Several aspects of the Western lifestyle are known risk factors for breast cancer. In particular, previous studies have shown that cholesterol levels can play an important role in the regulation of tumor progression. METHODS In the present study, we modulated cholesterol metabolism in the human breast cancer cell lines MCF-7 and MDA-MB-231 using a genetic approach. Apolipoprotein A-I (apoA-I) and apolipoprotein E (apoE) were expressed in these cell lines to modulate cholesterol metabolism. The effects of these apolipoproteins on cancer cell properties were examined. RESULTS Our results show that both apolipoproteins can regulate cholesterol metabolism and can control the epithelial-to-mesenchymal transition process. However, these effects were different depending on the cell type. We show that expressing apoA-I or apoE stimulates proliferation, migration, and tumor growth of MCF-7 cells. However, apoA-I or apoE reduces proliferation and migration of MDA-MB-231 cells. CONCLUSIONS These data suggest that modulating sterol metabolism may be most effective at limiting tumor progression in models of triple-negative cancers.
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Affiliation(s)
| | | | | | - Roseline Guibon
- INSERM N2C UMR1069, University of Tours, 37032, Tours, France
- Department of Pathology, CHRU Tours-University of Tours, Tours, 37032, France
| | | | - Gaëlle Fromont
- INSERM N2C UMR1069, University of Tours, 37032, Tours, France
- Department of Pathology, CHRU Tours-University of Tours, Tours, 37032, France
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Avril P, Vidal L, Barille-Nion S, Le Nail LR, Redini F, Layrolle P, Pinault M, Chevalier S, Perrot P, Trichet V. Epinephrine Infiltration of Adipose Tissue Impacts MCF7 Breast Cancer Cells and Total Lipid Content. Int J Mol Sci 2019; 20:ijms20225626. [PMID: 31717935 PMCID: PMC6888424 DOI: 10.3390/ijms20225626] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 10/31/2019] [Accepted: 11/04/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Considering the positive or negative potential effects of adipocytes, depending on their lipid composition, on breast tumor progression, it is important to evaluate whether adipose tissue (AT) harvesting procedures, including epinephrine infiltration, may influence breast cancer progression. METHODS Culture medium conditioned with epinephrine-infiltrated adipose tissue was tested on human Michigan Cancer Foundation-7 (MCF7) breast cancer cells, cultured in monolayer or in oncospheres. Lipid composition was evaluated depending on epinephrine-infiltration for five patients. Epinephrine-infiltrated adipose tissue (EI-AT) or corresponding conditioned medium (EI-CM) were injected into orthotopic breast carcinoma induced in athymic mouse. RESULTS EI-CM significantly increased the proliferation rate of MCF7 cells Moreover EI-CM induced an output of the quiescent state of MCF7 cells, but it could be either an activator or inhibitor of the epithelial mesenchymal transition as indicated by gene expression changes. EI-CM presented a significantly higher lipid total weight compared with the conditioned medium obtained from non-infiltrated-AT of paired-patients. In vivo, neither the EI-CM or EI-AT injection significantly promoted MCF7-induced tumor growth. CONCLUSIONS Even though conditioned media are widely used to mimic the secretome of cells or tissues, they may produce different effects on tumor progression, which may explain some of the discrepancy observed between in vitro, preclinical and clinical data using AT samples.
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Affiliation(s)
- Pierre Avril
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
| | - Luciano Vidal
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
| | - Sophie Barille-Nion
- CRCINA, INSERM, Université d’Angers, Université de Nantes, F-44035 Nantes, France;
| | - Louis-Romée Le Nail
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
| | - Françoise Redini
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
| | - Pierre Layrolle
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
| | - Michelle Pinault
- INSERM Université de Tours, UMR1069, Nutrition, Croissance et Cancer, F-37032 Tours, France; (M.P.); (S.C.)
| | - Stéphane Chevalier
- INSERM Université de Tours, UMR1069, Nutrition, Croissance et Cancer, F-37032 Tours, France; (M.P.); (S.C.)
| | - Pierre Perrot
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
- CHU de Nantes, Service de Chirurgie Plastique et des Brûlés, F-44035 Nantes, France
- Correspondence: ; Tel.: +33-2-40-08-73-02
| | - Valérie Trichet
- INSERM, Université de Nantes, UMR1238, Phy-Os, Sarcomes osseux et remodelage des tissus calcifiés, F-44035 Nantes, France; (P.A.); (L.V.); (L.-R.L.N.); (F.R.); (P.L.); (V.T.)
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11
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Pinault M, Guimaraes C, Dumas J, Servais S, Chevalier S, Besson P, Goupille C. A 1D High Performance Thin Layer Chromatography Method Validated to Quantify Phospholipids Including Cardiolipin and Monolysocardiolipin from Biological Samples. EUR J LIPID SCI TECH 2019. [DOI: 10.1002/ejlt.201900240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michelle Pinault
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- Faculté de Médecine de Tours Université de Tours 37000 Tours France
| | - Cyrille Guimaraes
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- Faculté de Médecine de Tours Université de Tours 37000 Tours France
| | - Jean‐François Dumas
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- Faculté de Pharmacie de Tours Université de Tours 37200 Tours France
| | - Stéphane Servais
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- IUT de Tours Université de Tours 37100 Tours France
| | - Stephan Chevalier
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- Faculté de Pharmacie de Tours Université de Tours 37200 Tours France
| | - Pierre Besson
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- Faculté de Pharmacie de Tours Université de Tours 37200 Tours France
| | - Caroline Goupille
- Université de Tours, INSERM N2C UMR1069 37032 Tours cedex 01 France
- CHRU de Tours, Hôpital Bretonneau 2 boulevard Tonnellé 37000 Tours France
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12
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Chas M, Goupille C, Arbion F, Bougnoux P, Pinault M, Jourdan ML, Chevalier S, Ouldamer L. Low eicosapentaenoic acid and gamma-linolenic acid levels in breast adipose tissue are associated with inflammatory breast cancer. Breast 2019; 45:113-117. [DOI: 10.1016/j.breast.2019.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 02/24/2019] [Accepted: 04/01/2019] [Indexed: 12/21/2022] Open
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13
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Grolez GP, Hammadi M, Barras A, Gordienko D, Slomianny C, Völkel P, Angrand PO, Pinault M, Guimaraes C, Potier-Cartereau M, Prevarskaya N, Boukherroub R, Gkika D. Encapsulation of a TRPM8 Agonist, WS12, in Lipid Nanocapsules Potentiates PC3 Prostate Cancer Cell Migration Inhibition through Channel Activation. Sci Rep 2019; 9:7926. [PMID: 31138874 PMCID: PMC6538610 DOI: 10.1038/s41598-019-44452-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/14/2019] [Indexed: 01/24/2023] Open
Abstract
In prostate carcinogenesis, expression and/or activation of the Transient Receptor Potential Melastatin 8 channel (TRPM8) was shown to block in vitro Prostate Cancer (PCa) cell migration. Because of their localization at the plasma membrane, ion channels, such as TRPM8 and other membrane receptors, are promising pharmacological targets. The aim of this study was thus to use nanocarriers encapsulating a TRPM8 agonist to efficiently activate the channel and therefore arrest PCa cell migration. To achieve this goal, the most efficient TRPM8 agonist, WS12, was encapsulated into Lipid NanoCapsules (LNC). The effect of the nanocarriers on channel activity and cellular physiological processes, such as cell viability and migration, were evaluated in vitro and in vivo. These results provide a proof-of-concept support for using TRPM8 channel-targeting nanotechnologies based on LNC to develop more effective methods inhibiting PCa cell migration in zebrafish xenograft.
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Affiliation(s)
- G P Grolez
- Univ. Lille, Inserm, U1003 - PHYCEL - Physiologie Cellulaire, F-59000, Lille, France.,Laboratory of Excellence, Ion Channels Science and Therapeutics, Villeneuve d'Ascq, France
| | - M Hammadi
- Univ. Lille, CNRS, Central Lille, ISEN, Univ. Valenciennes, UMR 8520, IEMN, F-59000, Lille, France
| | - A Barras
- Univ. Lille, CNRS, Central Lille, ISEN, Univ. Valenciennes, UMR 8520, IEMN, F-59000, Lille, France
| | - D Gordienko
- Univ. Lille, Inserm, U1003 - PHYCEL - Physiologie Cellulaire, F-59000, Lille, France.,Laboratory of Excellence, Ion Channels Science and Therapeutics, Villeneuve d'Ascq, France
| | - C Slomianny
- Univ. Lille, Inserm, U1003 - PHYCEL - Physiologie Cellulaire, F-59000, Lille, France.,Laboratory of Excellence, Ion Channels Science and Therapeutics, Villeneuve d'Ascq, France
| | - P Völkel
- Univ. Lille, U908 - CPAC, Cell Plasticity and Cancer, F-59000, Lille, France.,CNRS, CPAC, Cell Plasticity and Cancer, Lille, France
| | - P O Angrand
- Univ. Lille, U908 - CPAC, Cell Plasticity and Cancer, F-59000, Lille, France
| | - M Pinault
- Université de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, Tours, France.,Ion channel Network and Cancer-Canceropole Grand Ouest, (IC-CGO), Nantes, France
| | - C Guimaraes
- Université de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, Tours, France.,Ion channel Network and Cancer-Canceropole Grand Ouest, (IC-CGO), Nantes, France
| | - M Potier-Cartereau
- Université de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, Tours, France.,Ion channel Network and Cancer-Canceropole Grand Ouest, (IC-CGO), Nantes, France
| | - N Prevarskaya
- Univ. Lille, Inserm, U1003 - PHYCEL - Physiologie Cellulaire, F-59000, Lille, France.,Laboratory of Excellence, Ion Channels Science and Therapeutics, Villeneuve d'Ascq, France
| | - R Boukherroub
- Univ. Lille, CNRS, Central Lille, ISEN, Univ. Valenciennes, UMR 8520, IEMN, F-59000, Lille, France
| | - D Gkika
- Univ. Lille, Inserm, U1003 - PHYCEL - Physiologie Cellulaire, F-59000, Lille, France. .,Laboratory of Excellence, Ion Channels Science and Therapeutics, Villeneuve d'Ascq, France.
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14
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Boutin R, Munnier E, Renaudeau N, Girardot M, Pinault M, Chevalier S, Chourpa I, Clément-Larosière B, Imbert C, Boudesocque-Delaye L. Spirulina platensis sustainable lipid extracts in alginate-based nanocarriers: An algal approach against biofilms. ALGAL RES 2019. [DOI: 10.1016/j.algal.2018.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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15
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Figiel S, Pinault M, Domingo I, Guimaraes C, Guibon R, Besson P, Tavernier E, Blanchet P, Multigner L, Bruyère F, Haillot O, Mathieu R, Vincendeau S, Rioux-Leclercq N, Lebdai S, Azzouzi AR, Perrouin-Verbe MA, Fournier G, Doucet L, Rigaud J, Renaudin K, Mahéo K, Fromont G. Fatty acid profile in peri-prostatic adipose tissue and prostate cancer aggressiveness in African-Caribbean and Caucasian patients. Eur J Cancer 2018; 91:107-115. [PMID: 29413967 DOI: 10.1016/j.ejca.2017.12.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/29/2017] [Accepted: 12/11/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Genetic and nutritional factors have been linked to the risk of aggressive prostate cancer (PCa). The fatty acid (FA) composition of peri-prostatic adipose tissue (PPAT), which reflects the past FA intake, is potentially involved in PCa progression. We analysed the FA composition of PPAT, in correlation with the ethno-geographical origin of the patients and markers of tumour aggressiveness. METHODS From a cohort of 1000 men treated for PCa by radical prostatectomy, FA composition of PPAT was analysed in 156 patients (106 Caucasians and 50 African-Caribbeans), 78 with an indolent tumour (ISUP group 1 + pT2 + PSA <10 ng/mL) and 78 with an aggressive tumour (ISUP group 4-5 + pT3). The effect of FA extracted from PPAT on in-vitro migration of PCa cells DU145 was studied in 72 patients, 36 Caucasians, and 36 African-Caribbeans. RESULTS FA composition differed according to the ethno-geographical origin. Linoleic acid, an essential n-6 FA, was 2-fold higher in African-Caribbeans compared with Caucasian patients, regardless of disease aggressiveness. In African-Caribbeans, the FA profile associated with PCa aggressiveness was characterised by low level of linoleic acid along with high levels of saturates. In Caucasians, a weak and negative association was observed between eicosapentaenoic acid level (an n-3 FA) and disease aggressiveness. In-vitro migration of PCa cells using PPAT from African-Caribbean patients was associated with lower content of linoleic acid. CONCLUSION These results highlight an important ethno-geographical variation of PPAT, in both their FA content and association with tumour aggressiveness.
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Affiliation(s)
- Sandy Figiel
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France
| | - Michelle Pinault
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France
| | - Isabelle Domingo
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France
| | - Cyrille Guimaraes
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France
| | - Roseline Guibon
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France; CHRU Bretonneau, Department of Pathology, Tours, France; CHRU Bretonneau, Department of Urology, Tours, France
| | - Pierre Besson
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France
| | - Elsa Tavernier
- CHRU Tours, Clinical Investigation Center - INSERM 1415, Tours, France
| | - Pascal Blanchet
- CHU Pointe à Pitre, Department of Urology, Guadeloupe, France; Inserm UMR1085 - IRSET, Rennes, France
| | | | - Franck Bruyère
- CHRU Bretonneau, Department of Pathology, Tours, France; CHRU Bretonneau, Department of Urology, Tours, France
| | - Olivier Haillot
- CHRU Bretonneau, Department of Pathology, Tours, France; CHRU Bretonneau, Department of Urology, Tours, France
| | - Romain Mathieu
- CHU Rennes, Department of Pathology, Rennes, France; CHU Rennes, Department of Urology, Rennes, France
| | - Sebastien Vincendeau
- CHU Rennes, Department of Pathology, Rennes, France; CHU Rennes, Department of Urology, Rennes, France
| | - Nathalie Rioux-Leclercq
- CHU Rennes, Department of Pathology, Rennes, France; CHU Rennes, Department of Urology, Rennes, France
| | | | | | | | - Georges Fournier
- CHU Brest, Department of Pathology, Brest, France; CHU Brest, Department of Urology, Brest, France
| | - Laurent Doucet
- CHU Brest, Department of Pathology, Brest, France; CHU Brest, Department of Urology, Brest, France
| | - Jerome Rigaud
- CHU Nantes, Department of Pathology, Nantes, France; CHU Nantes, Department of Urology, Nantes, France
| | - Karine Renaudin
- CHU Nantes, Department of Pathology, Nantes, France; CHU Nantes, Department of Urology, Nantes, France
| | - Karine Mahéo
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France
| | - Gaëlle Fromont
- Inserm UMR1069 "Nutrition, Croissance et Cancer" Université François Rabelais, Faculté de Médecine, 10 Bd Tonnellé, 37032 Tours, France; CHRU Bretonneau, Department of Pathology, Tours, France; CHRU Bretonneau, Department of Urology, Tours, France.
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16
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Pinault M, Guimaraes C, Couthon H, Thibonnet J, Fontaine D, Chantôme A, Chevalier S, Besson P, Jaffrès PA, Vandier C. Synthesis of Alkyl-Glycerolipids Standards for Gas Chromatography Analysis: Application for Chimera and Shark Liver Oils. Mar Drugs 2018; 16:E101. [PMID: 29570630 PMCID: PMC5923388 DOI: 10.3390/md16040101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/13/2018] [Accepted: 03/20/2018] [Indexed: 02/05/2023] Open
Abstract
Natural O-alkyl-glycerolipids, also known as alkyl-ether-lipids (AEL), feature a long fatty alkyl chain linked to the glycerol unit by an ether bond. AEL are ubiquitously found in different tissues but, are abundant in shark liver oil, breast milk, red blood cells, blood plasma, and bone marrow. Only a few AEL are commercially available, while many others with saturated or mono-unsaturated alkyl chains of variable length are not available. These compounds are, however, necessary as standards for analytical methods. Here, we investigated different reported procedures and we adapted some of them to prepare a series of 1-O-alkyl-glycerols featuring mainly saturated alkyl chains of various lengths (14:0, 16:0, 17:0, 19:0, 20:0, 22:0) and two monounsaturated chains (16:1, 18:1). All of these standards were fully characterized by NMR and GC-MS. Finally, we used these standards to identify the AEL subtypes in shark and chimera liver oils. The distribution of the identified AEL were: 14:0 (20-24%), 16:0 (42-54%) and 18:1 (6-16%) and, to a lesser extent, (0.2-2%) for each of the following: 16:1, 17:0, 18:0, and 20:0. These standards open the possibilities to identify AEL subtypes in tumours and compare their composition to those of non-tumour tissues.
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Affiliation(s)
| | | | - Hélène Couthon
- CEMCA, CNRS UMR6521, Université de Brest, IBSAM, 6 Av V. Le Gorgeu, 29238 Brest, France.
| | - Jérôme Thibonnet
- Equipe SIMBA, Synthèse et Isolement de Molécules BioActives, EA 7502, Université de Tours, 37000 Tours, France.
- Faculté de Sciences et Techniques, Université de Tours, 37000 Tours, France.
| | | | - Aurélie Chantôme
- Inserm, UMR1069, Université de Tours, 37000 Tours, France.
- Faculté de Pharmacie, Université de Tours, 37000 Tours, France.
| | - Stephan Chevalier
- Inserm, UMR1069, Université de Tours, 37000 Tours, France.
- Faculté de Pharmacie, Université de Tours, 37000 Tours, France.
| | - Pierre Besson
- Inserm, UMR1069, Université de Tours, 37000 Tours, France.
- Faculté de Pharmacie, Université de Tours, 37000 Tours, France.
| | - Paul-Alain Jaffrès
- CEMCA, CNRS UMR6521, Université de Brest, IBSAM, 6 Av V. Le Gorgeu, 29238 Brest, France.
| | - Christophe Vandier
- Inserm, UMR1069, Université de Tours, 37000 Tours, France.
- Faculté de Sciences et Techniques, Université de Tours, 37000 Tours, France.
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17
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Fromont G, Figiel S, Maheo K, Pinault M, Blanchet P, Multigner L, Bruyere F, Mathieu R, Vincendeau S, Lebdai S, Azzouzi A, Perrouin-verbe M, Fournier G, Rigaud J, Charles T. Composition en acides gras du tissu adipeux périprostatique : association à l’agressivité tumorale et à l’origine ethno-géographique (réseau ReSCaP). Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Aigbirhio FI, Allwein S, Anwar A, Atzrodt J, Audisio D, Badman G, Bakale R, Berthon F, Bragg R, Brindle KM, Bushby N, Campos S, Cant AA, Chan MYT, Colbon P, Cornelissen B, Czarny B, Derdau V, Dive V, Dunscombe M, Eggleston I, Ellis-Sawyer K, Elmore CS, Engstrom P, Ericsson C, Fairlamb IJS, Georgin D, Godfrey SP, He L, Hickey MJ, Huscroft IT, Kerr WJ, Lashford A, Lenz E, Lewinton S, L'Hermite MM, Lindelöf Å, Little G, Lockley WJS, Loreau O, Maddocks S, Marguerit M, Mirabello V, Mudd RJ, Nilsson GN, Owens PK, Pascu SI, Patriarche G, Pimlott SL, Pinault M, Plastow G, Racys DT, Reif J, Rossi J, Ruan J, Sarpaki S, Sephton SM, Simonsson R, Speed DJ, Sumal K, Sutherland A, Taran F, Thuleau A, Wang Y, Waring M, Watters WH, Wu J, Xiao J. Abstracts of the 24th international isotope society (UK group) symposium: synthesis and applications of labelled compounds 2015. J Labelled Comp Radiopharm 2016; 59:175-86. [PMID: 26991121 DOI: 10.1002/jlcr.3377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 01/11/2016] [Indexed: 11/09/2022]
Abstract
The 24th annual symposium of the International Isotope Society's United Kingdom Group took place at the Møller Centre, Churchill College, Cambridge, UK on Friday 6th November 2015. The meeting was attended by 77 delegates from academia and industry, the life sciences, chemical, radiochemical and scientific instrument suppliers. Delegates were welcomed by Dr Ken Lawrie (GlaxoSmithKline, UK, chair of the IIS UK group). The subsequent scientific programme consisted of oral presentations, short 'flash' presentations in association with particular posters and poster presentations. The scientific areas covered included isotopic synthesis, regulatory issues, applications of labelled compounds in imaging, isotopic separation and novel chemistry with potential implications for isotopic synthesis. Both short-lived and long-lived isotopes were represented, as were stable isotopes. The symposium was divided into a morning session chaired by Dr Rebekka Hueting (University of Oxford, UK) and afternoon sessions chaired by Dr Sofia Pascu (University of Bath, UK) and by Dr Alan Dowling (Syngenta, UK). The UK meeting concluded with remarks from Dr Ken Lawrie (GlaxoSmithKline, UK).
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19
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Peyta L, Jarnouen K, Pinault M, Guimaraes C, Pais de Barros JP, Chevalier S, Dumas JF, Maillot F, Hatch GM, Loyer P, Servais S. Reduced cardiolipin content decreases respiratory chain capacities and increases ATP synthesis yield in the human HepaRG cells. Biochim Biophys Acta 2016; 1857:443-53. [PMID: 26768115 DOI: 10.1016/j.bbabio.2016.01.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 12/14/2015] [Accepted: 01/04/2016] [Indexed: 11/17/2022]
Abstract
Cardiolipin (CL) is a unique mitochondrial phospholipid potentially affecting many aspects of mitochondrial function/processes, i.e. energy production through oxidative phosphorylation. Most data focusing on implication of CL content and mitochondrial bioenergetics were performed in yeast or in cellular models of Barth syndrome. Previous work reported that increase in CL content leads to decrease in liver mitochondrial ATP synthesis yield. Therefore the aim of this study was to determine the effects of moderate decrease in CL content on mitochondrial bioenergetics in human hepatocytes. For this purpose, we generated a cardiolipin synthase knockdown (shCLS) in HepaRG hepatoma cells showing bioenergetics features similar to primary human hepatocytes. shCLS cells exhibited a 55% reduction in CLS gene and a 40% decrease in protein expression resulting in a 45% lower content in CL compared to control (shCTL) cells. Oxygen consumption was significantly reduced in shCLS cells compared to shCTL regardless of substrate used and energy state analyzed. Mitochondrial low molecular weight supercomplex content was higher in shCLS cells (+60%) compared to shCTL. Significant fragmentation of the mitochondrial network was observed in shCLS cells compared to shCTL cells. Surprisingly, mitochondrial ATP synthesis was unchanged in shCLS compared to shCTL cells but exhibited a higher ATP:O ratio (+46%) in shCLS cells. Our results suggest that lowered respiratory chain activity induced by moderate reduction in CL content may be due to both destabilization of supercomplexes and mitochondrial network fragmentation. In addition, CL content may regulate mitochondrial ATP synthesis yield.
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Affiliation(s)
- Laure Peyta
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Kathleen Jarnouen
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes, Cedex, France.
| | - Michelle Pinault
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Cyrille Guimaraes
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Jean-Paul Pais de Barros
- Plateforme de Lipidomique, INSERM UMR866/LabEx LipSTIC, 15 Bd Mal de Lattre de Tassigny, 21000 Dijon, France.
| | - Stephan Chevalier
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Jean-François Dumas
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - François Maillot
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France; CHRU de Tours, Département de Médecine Interne, 2, boulevard Tonnellé, 37044 Tours, Cedex 9, France.
| | - Grant M Hatch
- Department of Pharmacology and Therapeutics, Biochemistry and Medical Genetics, Faculty of Health Sciences, Center for Research and Treatment of Atherosclerosis, DREAM Children's Hospital Research Institute of Manitoba, University of Manitoba, 513-715 McDermot Avenue Winnipeg MB R3E 3P4, Manitoba, Canada.
| | - Pascal Loyer
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes, Cedex, France.
| | - Stephane Servais
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
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Peyta L, Jarnouen K, Pinault M, Coulouarn C, Guimaraes C, Goupille C, de Barros JPP, Chevalier S, Dumas JF, Maillot F, Hatch GM, Loyer P, Servais S. Regulation of hepatic cardiolipin metabolism by TNFα: Implication in cancer cachexia. Biochim Biophys Acta Mol Cell Biol Lipids 2015; 1851:1490-500. [PMID: 26327596 DOI: 10.1016/j.bbalip.2015.08.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 07/19/2015] [Accepted: 08/24/2015] [Indexed: 11/19/2022]
Abstract
Cardiolipin (CL) content accumulation leads to an increase in energy wasting in liver mitochondria in a rat model of cancer cachexia in which tumor necrosis factor alpha (TNFα) is highly expressed. In this study we investigated the mechanisms involved in liver mitochondria CL accumulation in cancer cachexia and examined if TNFα was involved in this process leading to mitochondrial bioenergetics alterations. We studied gene, protein expression and activity of the main enzymes involved in CL metabolism in liver mitochondria from a rat model of cancer cachexia and in HepaRG hepatocyte-like cells exposed to 20 ng/ml of TNFα for 12 h. Phosphatidylglycerolphosphate synthase (PGPS) gene expression was increased 2.3-fold (p<0.02) and cardiolipin synthase (CLS) activity decreased 44% (p<0.03) in cachectic rat livers compared to controls. CL remodeling enzymes monolysocardiolipin acyltransferase (MLCL AT-1) activity and tafazzin (TAZ) gene expression were increased 30% (p<0.01) and 50% (p<0.02), respectively, in cachectic rat livers compared to controls. Incubation of hepatocytes with TNFα increased CL content 15% (p<0.05), mitochondrial oxygen consumption 33% (p<0.05), PGPS gene expression 44% (p<0.05) and MLCL AT-1 activity 20% (p<0.05) compared to controls. These above findings strongly suggest that in cancer cachexia, TNFα induces a higher energy wasting in liver mitochondria by increasing CL content via upregulation of PGPS expression.
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Affiliation(s)
- Laure Peyta
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France.
| | - Kathleen Jarnouen
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes cedex, France.
| | - Michelle Pinault
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France.
| | - Cedric Coulouarn
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes cedex, France.
| | - Cyrille Guimaraes
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France.
| | - Caroline Goupille
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France; CHRU de Tours, Département de Médecine Interne, 2, bd Tonnellé, 37044 Tours cedex 9, France.
| | - Jean-Paul Pais de Barros
- Plateforme de Lipidomique. INSERM UMR866/LabEx LipSTIC, 15 Bd Mal de Lattre de Tassigny, 21000 Dijon, France.
| | - Stephan Chevalier
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France.
| | - Jean-François Dumas
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France.
| | - François Maillot
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France; CHRU de Tours, Département de Médecine Interne, 2, bd Tonnellé, 37044 Tours cedex 9, France.
| | - Grant M Hatch
- Department of Pharmacology and Therapeutics, Biochemistry and Medical Genetics, Faculty of Health Sciences, Center for Research and Treatment of Atherosclerosis, DREAM Children's Hospital Research Institute of Manitoba, University of Manitoba, 513-715 McDermot Avenue, Winnipeg R3E 3P4, Manitoba, Canada.
| | - Pascal Loyer
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes cedex, France.
| | - Stephane Servais
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours-10, bd Tonnellé, 37032 Tours Cedex, France.
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Jouneau S, Pinault M, Gouyet T, Brinchault G, Guillot S, Viel JF, Presle JC, Desrues B. Étude AIRBAg : résultats préliminaires après un an de dépistage de la BPCO agricole. Rev Mal Respir 2015; 32:240-8. [DOI: 10.1016/j.rmr.2014.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 03/15/2014] [Indexed: 11/28/2022]
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Guillaumond F, Bidaut G, Ouaissi M, Servais S, Gouirand V, Olivares O, Lac S, Borge L, Roques J, Gayet O, Pinault M, Guimaraes C, Nigri J, Loncle C, Lavaut MN, Garcia S, Tailleux A, Staels B, Calvo E, Tomasini R, Iovanna JL, Vasseur S. Cholesterol uptake disruption, in association with chemotherapy, is a promising combined metabolic therapy for pancreatic adenocarcinoma. Proc Natl Acad Sci U S A 2015; 112:2473-8. [PMID: 25675507 PMCID: PMC4345573 DOI: 10.1073/pnas.1421601112] [Citation(s) in RCA: 267] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The malignant progression of pancreatic ductal adenocarcinoma (PDAC) is accompanied by a profound desmoplasia, which forces proliferating tumor cells to metabolically adapt to this new microenvironment. We established the PDAC metabolic signature to highlight the main activated tumor metabolic pathways. Comparative transcriptomic analysis identified lipid-related metabolic pathways as being the most highly enriched in PDAC, compared with a normal pancreas. Our study revealed that lipoprotein metabolic processes, in particular cholesterol uptake, are drastically activated in the tumor. This process results in an increase in the amount of cholesterol and an overexpression of the low-density lipoprotein receptor (LDLR) in pancreatic tumor cells. These findings identify LDLR as a novel metabolic target to limit PDAC progression. Here, we demonstrate that shRNA silencing of LDLR, in pancreatic tumor cells, profoundly reduces uptake of cholesterol and alters its distribution, decreases tumor cell proliferation, and limits activation of ERK1/2 survival pathway. Moreover, blocking cholesterol uptake sensitizes cells to chemotherapeutic drugs and potentiates the effect of chemotherapy on PDAC regression. Clinically, high PDAC Ldlr expression is not restricted to a specific tumor stage but is correlated to a higher risk of disease recurrence. This study provides a precise overview of lipid metabolic pathways that are disturbed in PDAC. We also highlight the high dependence of pancreatic cancer cells upon cholesterol uptake, and identify LDLR as a promising metabolic target for combined therapy, to limit PDAC progression and disease patient relapse.
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Affiliation(s)
- Fabienne Guillaumond
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Ghislain Bidaut
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Mehdi Ouaissi
- INSERM, UMR911, Centre de Recherche en Oncologie Biologique et Oncopharmacologie, F-13385 Marseille, France; Service de Chirurgie Digestive et Viscérale, F-13385 Marseille, France
| | - Stéphane Servais
- INSERM, U1069, Laboratoire Nutrition, Croissance et Cancer, Université François Rabelais, F-37032 Tours, France
| | - Victoire Gouirand
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Orianne Olivares
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Sophie Lac
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Laurence Borge
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Julie Roques
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Odile Gayet
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Michelle Pinault
- INSERM, U1069, Laboratoire Nutrition, Croissance et Cancer, Université François Rabelais, F-37032 Tours, France
| | - Cyrille Guimaraes
- INSERM, U1069, Laboratoire Nutrition, Croissance et Cancer, Université François Rabelais, F-37032 Tours, France
| | - Jérémy Nigri
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Céline Loncle
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Marie-Noëlle Lavaut
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France; Service Hospitalier d'Anatomie et Cytologie Pathologiques Humaines, Assistance Publique-Hôpitaux de Marseille, F-13015 Marseille, France
| | - Stéphane Garcia
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France; Service Hospitalier d'Anatomie et Cytologie Pathologiques Humaines, Assistance Publique-Hôpitaux de Marseille, F-13015 Marseille, France
| | - Anne Tailleux
- European Genomic Institute for Diabetes, FR 3508, Université Lille 2, INSERM, U1011, and Institut Pasteur de Lille, F-59019 Lille, France; and
| | - Bart Staels
- European Genomic Institute for Diabetes, FR 3508, Université Lille 2, INSERM, U1011, and Institut Pasteur de Lille, F-59019 Lille, France; and
| | - Ezequiel Calvo
- Molecular Endocrinology and Oncology Research Center, Quebec, QC, Canada G1V 4G2
| | - Richard Tomasini
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Juan Lucio Iovanna
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France
| | - Sophie Vasseur
- INSERM, U1068, Centre de Recherche en Cancérologie de Marseille, Institut Paoli-Calmettes, CNRS, UMR7258, and Université Aix-Marseille, F-13009 Marseille, France;
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Chantôme A, Potier-Cartereau M, Clarysse L, Fromont G, Marionneau-Lambot S, Guéguinou M, Pagès JC, Collin C, Oullier T, Girault A, Arbion F, Haelters JP, Jaffrès PA, Pinault M, Besson P, Joulin V, Bougnoux P, Vandier C. Pivotal Role of the Lipid Raft SK3–Orai1 Complex in Human Cancer Cell Migration and Bone Metastases. Cancer Res 2013; 73:4852-61. [DOI: 10.1158/0008-5472.can-12-4572] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pinault M, Loiseau N, Chabanet P, Durville P, Magalon H, Quod JP, Galzin R. Marine fish communities in shallow volcanic habitats. J Fish Biol 2013; 82:1821-1847. [PMID: 23731139 DOI: 10.1111/jfb.12110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 02/19/2013] [Indexed: 06/02/2023]
Abstract
This survey of the marine ichthyofauna of the Piton de La Fournaise volcano at Reunion Island is the first explanatory study of fish community structures in this area. It describes and analyses the main qualitative descriptors of the fish communities (i.e. species richness, diet, life history and geographical distribution) and their spatio-temporal organization. This investigation in 2011 examined lava flows of different ages, including the most recent flows that entered the ocean between 1977 and 2007. In all, 263 species belonging to 45 families were observed. Overall, the fish community was notable for an absence of top predators and a predominance of opportunistic small-bodied species, with dietary flexibility and high reproductive rates, characteristic of the early stages of ecological succession. Between-site analysis indicated that the fish assemblages differed essentially according to the intensity of the last volcanic disturbances. Fish communities in the most disturbed sites showed the highest numbers of Serranidae and the highest proportions of omnivores and small-bodied opportunistic carnivores, including a high proportion of endemic south-western Indian Ocean species. The spatial pattern of this last category of species could be the result of convergent biological traits, and their adaptation to unstable environments at the expense of their competitiveness in more biodiverse, mature communities. Conversely, fish communities in the less disturbed sites showed the highest number of Holocentridae and the highest proportion of browsers of sessile invertebrates. This last characteristic could be a consequence of higher ecological maturity, illustrated by a more specialized trophic network, for assemblages in areas with less intense disturbances. Otherwise, high structural complexity, either in unconsolidated lava boulders, rocks and rubble or high coral-covered sites, could favour the increase of the total number of species independent of disturbance intensity. Regarding the broader effects, this study helps better understand how ecosystems can resist or recover from acute disturbances and the process of ecological succession that leads to the establishment of fish communities in newly submerged habitats.
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Affiliation(s)
- M Pinault
- Pareto ecoconsult-Reunion Island agency, 97490 Sainte-Clotilde, Reunion Island, France.
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Boulanger P, Belkadi L, Descarpentries J, Porterat D, Hibert E, Brouzes A, Mille M, Patel S, Pinault M, Reynaud C, Mayne-L'Hermite M, Decamps JM. Towards large scale aligned carbon nanotube composites: an industrial safe-by-design and sustainable approach. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012050] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Julienne CM, Dumas JF, Goupille C, Pinault M, Berri C, Collin A, Tesseraud S, Couet C, Servais S. Cancer cachexia is associated with a decrease in skeletal muscle mitochondrial oxidative capacities without alteration of ATP production efficiency. J Cachexia Sarcopenia Muscle 2012; 3:265-75. [PMID: 22648737 PMCID: PMC3505576 DOI: 10.1007/s13539-012-0071-9] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 04/30/2012] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Cancer cachexia is a complex syndrome related to a negative energy balance resulting in muscle wasting. Implication of muscle mitochondrial bioenergetics alterations during cancer cachexia was suggested. Therefore, the aim of this study was to explore the efficiency of oxidative phosphorylation in skeletal muscle mitochondria in a preclinical model of cancer cachexia. METHODS Berlin-Druckrey IX rats with peritoneal carcinosis (PC) were used as a model of cancer cachexia with healthy pair-fed rats (PF) as control. Hindlimb muscle morphology and fibre type composition were analysed in parallel with ubiquitin ligases and UCP gene expression. Oxidative phosphorylation was investigated in isolated muscle mitochondria by measuring oxygen consumption and ATP synthesis rate. RESULTS PC rats underwent significant muscle wasting affecting fast glycolytic muscles due to a reduction in fibre cross-sectional area. MuRF1 and MAFbx gene expression were significantly increased (9- and 3.5-fold, respectively) in the muscle of PC compared to PF rats. Oxygen consumption in non-phosphorylating state and the ATP/O were similar in both groups. Muscle UCP2 gene was overexpressed in PC rats. State III and the uncoupled state were significantly lower in muscle mitochondria from PC rats with a parallel reduction in complex IV activity (-30 %). CONCLUSION This study demonstrated that there was neither alteration in ATP synthesis efficiency nor mitochondrial uncoupling in skeletal muscle of cachectic rats despite UCP2 gene overexpression. Muscle mitochondrial oxidative capacities were reduced due to a decrease in complex IV activity. This mitochondrial bioenergetics alteration could participate to insulin resistance, lipid droplet accumulation and lactate production.
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Affiliation(s)
- Cloé M Julienne
- INSERM U921, Nutrition, Croissance et Cancer, 37032, Tours, France
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27
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Girault A, Haelters JP, Potier-Cartereau M, Chantome A, Pinault M, Marionneau-Lambot S, Oullier T, Simon G, Couthon-Gourvès H, Jaffrès PA, Corbel B, Bougnoux P, Joulin V, Vandier C. New alkyl-lipid blockers of SK3 channels reduce cancer cell migration and occurrence of metastasis. Curr Cancer Drug Targets 2012; 11:1111-25. [PMID: 21999627 DOI: 10.2174/156800911798073069] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 07/24/2011] [Accepted: 07/25/2011] [Indexed: 11/22/2022]
Abstract
Edelfosine is an inhibitor of SK3 channel mediated cell migration. However, this compound bears adverse in vivo side effects. Using cell SK3 dependent cell-migration assay, patch-clamp, (125)I-apamin binding, and in vivo experiments we tested the ability of 15 lipid derivatives with chemical structures inspired from edelfosine to inhibit SK3 channels. Using a structure-activity relationship approach we identified an edelfosine analog named Ohmline (1-O-hexadecyl- 2-O-methyl-sn-glycero-3-lactose) with potent inhibitory effects on the SK3 channel. Its potency was greater for SK3 channels than for SK1 channels; it did not affect IKCa channels and only slightly but not significantly affected SK2 channels. This is the first SKCa channel blocker that can be used to discriminate between SK2 and SK1/SK3 channels and represents a useful tool to investigate the functional role of SK3 channels in peripheral tissues (that do not express SK1 channels). This compound, which acts with an IC(50) of 300 nM, did not displace apamin from SKCa channels and had no effect on non-specific edelfosine targets such as protein kinase C (PKC), receptors for platelet activating factor (PAF) and lysophosphatidic acid (LPA), as well as non-cancerous cells. This is promising because the pitfalls associated with the use of edelfosine-like compounds have been that their effective and high concentrations are often cytotoxic due to their detergent-like character causing normal cell lysis. Finally, Ohmline reduced metastasis development in a mice model of tumor indicating that this compound could become a lead compound for the first class of lipid-antimetastatic agent.
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Affiliation(s)
- A Girault
- Inserm, U921, Tours, F-37032 France, Université François Rabelais, Tours, F-37032 France
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Delmas M, Pinault M, Patel S, Porterat D, Reynaud C, Mayne-L'Hermite M. Growth of long and aligned multi-walled carbon nanotubes on carbon and metal substrates. Nanotechnology 2012; 23:105604. [PMID: 22362164 DOI: 10.1088/0957-4484/23/10/105604] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Well aligned, long and dense multi-walled carbon nanotubes (CNT) can be grown on both carbon fibres and any metal substrates compatible with the CNT synthesis temperature. The injection-CVD process developed involves two stages, including fibre pretreatment by depositing a SiO(2)-based sub-layer from an organometallic precursor followed by CNT growth from toluene/ferrocene precursor mixture. Carbon substrates, as well as metals, can easily be treated with this process, which takes place in the same reactor and does not need any handling in between the two stages. The aligned CNT carpets obtained are similar to the ones grown on reference quartz substrates. The CNT growth rate is fairly high (ca. 30 μm min(-1)) and it is possible to control CNT length by varying the CNT synthesis duration. The thickness of the SiO(2)-based sub-layer can be varied and is shown to have an influence on the CNT growth. This layer is assumed to play a diffusion barrier layer role between the substrate and the iron based catalyst nanoparticles producing CNT. The CNT anchorage to the carbon fibres has been checked and good overall adhesion proved, which is in favour of a good transfer of electrical charge and heat between the nanotubes and fibre.
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Affiliation(s)
- M Delmas
- CEA, IRAMIS, SPAM, Laboratoire Francis Perrin (CNRS URA 2453), Gif/Yvette, France
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Le Bourlot C, Landois P, Djaziri S, Renault PO, Le Bourhis E, Goudeau P, Pinault M, Mayne-L'Hermite M, Bacroix B, Faurie D, Castelnau O, Launois P, Rouzière S. Synchrotron X-ray diffraction experiments with a prototype hybrid pixel detector. J Appl Crystallogr 2011. [DOI: 10.1107/s0021889811049107] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A prototype X-ray pixel area detector (XPAD3.1) has been used for X-ray diffraction experiments with synchrotron radiation. The characteristics of this detector are very attractive in terms of fast readout time, high dynamic range and high signal-to-noise ratio. The prototype XPAD3.1 enabled various diffraction experiments to be performed at different energies, sample-to-detector distances and detector angles with respect to the direct beam, yet it was necessary to perform corrections on the diffraction images according to the type of experiment. This paper is focused on calibration and correction procedures to obtain high-quality scientific results specifically developed in the context of three different experiments, namely mechanical characterization of nanostructured multilayers, elastic–plastic deformation of duplex steel and growth of carbon nanotubes.
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Launois P, Huard M, Petermann D, Cambedouzou J, Mille M, Brouzes A, Pinault M, Mayne-L'Hermite M, Boulanger P. Automated characterization of nanotube membranes of large size by X-ray scattering. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311093081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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31
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March G, Volatron F, Lachaud F, Cheng X, Baret B, Pinault M, Etcheberry A, Perez H. Nanocomposite electrodes based on pre-synthesized organically capped platinum nanoparticles and carbon nanotubes. Part II: Determination of diffusion area for oxygen reduction reflects platinum accessibility. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Dumas JF, Goupille C, Julienne CM, Pinault M, Chevalier S, Bougnoux P, Servais S, Couet C. Efficiency of oxidative phosphorylation in liver mitochondria is decreased in a rat model of peritoneal carcinosis. J Hepatol 2011; 54:320-7. [PMID: 21094554 DOI: 10.1016/j.jhep.2010.08.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2009] [Revised: 08/18/2010] [Accepted: 08/27/2010] [Indexed: 12/04/2022]
Abstract
BACKGROUND & AIMS Cancer cachexia is a dynamic process characterized by a negative energy balance induced by anorexia and hypermetabolism. The mechanisms leading to hypermetabolism are not totally elucidated. This study examines the efficiency of oxidative phosphorylation and energy wasting in liver mitochondria isolated from rats with cancer cachexia induced by peritoneal carcinosis (PC). METHODS PC was generated by an intraperitoneal injection of cancer cells (PROb) in BDIX rats. The efficiency of oxidative phosphorylation and energy wasting as well as the role played by reactive oxygen species (ROS) and cardiolipin (mitochondrial inner membrane phospholipid) in these processes were assessed in liver mitochondria of PC and pair-fed control rats. RESULTS The efficiency of oxidative phosphorylation decreased (-26%) while energy wasting increased (+22%) in liver mitochondria from PC compared to control rats. The increased energy wasting was associated with a higher cardiolipin content (+55%, p<0.05; R(2)=0.64, p<0.05) and with a lower n-6/n-3 polyunsaturated fatty acid ratio in cardiolipin (-45%, p<0.05; R(2)=0.21, p<0.05) in PC rats. ROS production was increased by 12-fold in liver mitochondria from PC rats. CONCLUSIONS The efficiency of ATP synthesis was reduced and energy wasting processes were increased in liver mitochondria of PC rats. This suggests that liver mitochondria from PC rats request more nutrients than liver mitochondria from control rats to maintain the same ATP production. These alterations were associated to the content and fatty acid composition of cardiolipin.
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Dumas JF, Goupille C, Pinault M, Fandeur L, Bougnoux P, Servais S, Couet C. N-3 PUFA-Enriched Diet Delays the Occurrence of Cancer Cachexia in Rat With Peritoneal Carcinosis. Nutr Cancer 2010; 62:343-50. [DOI: 10.1080/01635580903407080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Baret B, Aubert PH, L’Hermite MM, Pinault M, Reynaud C, Etcheberry A, Perez H. Nanocomposite electrodes based on pre-synthesized organically capped platinum nanoparticles and carbon nanotubes. Part I: Tuneable low platinum loadings, specific H upd feature and evidence for oxygen reduction. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.04.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Glory J, Mierczynska A, Pinault M, Mayne-L'Hermite M, Reynaud C. Dispersion study of long and aligned multi-walled carbon nanotubes in water. J Nanosci Nanotechnol 2007; 7:3458-3462. [PMID: 18330157 DOI: 10.1166/jnn.2007.834] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Dispersion of nanotubes is a crucial step for many applications. The properties of the final nanotube-based material are strongly dependent on the quality of nanotube suspensions. In this study, long and aligned multi-walled carbon nanotubes obtained by catalytic chemical vapour deposition were dispersed in water with different dispersing agents using high intensity ultrasounds. Among different additives, we selected sodium dodecyl sulfate (SDS) as dispersing agent to prepare suspensions of nanotubes. UV-Visible spectrometry method was used to measure the influence of dispersion parameters (power and duration of sonication) on dispersion state and suspension stability. Therefore, we demonstrated that, even if high intensity ultra-sounds are breaking nanotubes, it is possible to obtain stable water-based suspensions containing MWNTs which exhibit length up to 20 microm.
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Affiliation(s)
- J Glory
- Laboratoire Francis Perrin (CEA-CNRS URA 2453), DSM/DRECAM/SPAM CEA-Saclay bât. 522, 91191 Gif sur Yvette Cedex, France
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Judé S, Martel E, Vincent F, Besson P, Couet C, Ogilvie GK, Pinault M, De Chalendar C, Bougnoux P, Richard S, Champeroux P, Crozatier B, Le Guennec JY. Dietary long-chain n-3 fatty acids modify blood and cardiac phospholipids and reduce protein kinase-C-delta and protein kinase-C-epsilon translocation. Br J Nutr 2007; 98:1143-51. [PMID: 17663802 DOI: 10.1017/s0007114507798914] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The effects of an n-3 PUFA-enriched diet on cardiac cell membrane phospholipid fraction compositions and associated protein kinase-C (PKC) translocation modification have never been studied in higher mammals. This is of importance since membrane fatty acid composition has been shown to influence PKC signalling pathways. In the present study, we have tested whether the incorporation of n-3 PUFA in cardiac membrane phospholipids correlated with changes in the fatty acid composition of diacylglycerols (DAG) and led to a differential translocation of PKC isoforms. Two groups of five dogs were fed the standard diet supplemented with palm oil or fish oil for 8 weeks. Dogs fed a fish oil-enriched diet showed a preferential incorporation of EPA and, to a lesser extent, of DHA, at the expense of arachidonic acid, in the circulating TAG, plasma phospholipids, erythrocyte phospholipids and cardiomyocyte phospholipid fractions. Analysis of 1,2-DAG fatty acid composition also indicated a preferential enrichment of EPA compared with DHA. Associated with these results, a reduction in the expression of PKC-delta and PKC-epsilon isoforms in the particulate fractions was observed whereas no effect was seen for PKC-alpha and PKC-zeta. We conclude that a fish oil-enriched diet induces a modification in fatty acid composition of cardiac membrane phospholipids, associated with a differential translocation of PKC isoforms. These results can be explained by the production of structurally different DAG that may participate in some of the protective effects of n-3 PUFA against various chronic diseases.
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Affiliation(s)
- Sébastien Judé
- CERB, Centre de Recherches Biologiques, Baugy, F-18800, France
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Maillot F, Garrigue MA, Pinault M, Objois M, Théret V, Lamisse F, Hoinard C, Antoine JM, Lairon D, Couet C. Changes in plasma triacylglycerol concentrations after sequential lunch and dinner in healthy subjects. Diabetes & Metabolism 2005; 31:69-77. [PMID: 15803116 DOI: 10.1016/s1262-3636(07)70169-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVES The present study examines the kinetic of plasma triacylglycerol (TAG) after sequential ingestion of lunch and dinner as well as the contribution of dietary fat ingested at lunch to subsequent post-dinner TAG composition. METHOD Six healthy subjects were included. After standardized breakfast (7: 30AM), 2 mixed meals with fat loads composed of 44 g olive oil (rich in oleic acid) at lunch (12PM) and 44 g sunflower oil (rich in linoleic acid) at dinner (7PM) were ingested. [1-13C] palmitate was added in lunch only. Plasma TAG and chylomicron-TAG (CMTAG) levels were measured sequentially after meals. [1-13C] palmitate enrichment and concentrations of oleic acid and linoleic acid were measured in all lipid fractions. RESULT Post-dinner plasma TAG peak was delayed as compared to lunch (3 hours vs 1 hour, p=0.002) whereas the magnitude of the postprandial peaks was not significantly different between lunch and dinner (2.4+/-0.3 vs 2.0+/-0.4 mmol/L, p=0.85). [1-13C] palmitate enrichment was maximal 5 hours after lunch in all lipid fractions and decreased slowly thereafter. After dinner ingestion, the rate of decline of [1-13C] palmitate enrichment plateaued during the first 60 minutes. Oleic acid increased slightly and immediately after dinner and remained the predominant fatty acid in all lipid fractions during the first hour after dinner. A delayed peak of plasma and CM-TAG was observed after dinner as compared to lunch without difference in the magnitude of peaks. CONCLUSION The contribution of dietary fat ingested at lunch to post-dinner lipemia is confirmed despite the relatively long lasting interval between the 2 meals (7 h) and the absence of any early peak of plasma TAG after dinner.
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Affiliation(s)
- F Maillot
- Laboratoire de Nutrition, INSERM 0211, Faculté de Médecine de Tours, France.
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Judé S, Bedut S, Roger S, Pinault M, Champeroux P, White E, Le Guennec JY. Peroxidation of docosahexaenoic acid is responsible for its effects on I TO and I SS in rat ventricular myocytes. Br J Pharmacol 2003; 139:816-22. [PMID: 12813005 PMCID: PMC1573904 DOI: 10.1038/sj.bjp.0705308] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1 Exposure to docosahexaenoïc acid (DHA), a long-chain polyunsaturated fatty acid, is known to block several ionic currents such as the transient outward current I(TO). It has also been reported to activate certain potassium channels. It has been suggested that these effects, observed in single-cell experiments, participate in the antiarrhythmic properties of these compounds in vivo. 2 DHA is highly prone to peroxidation. To investigate the influence peroxidation may have on the effects of DHA on ion channels, we studied I(TO) and the steady-state outward current I(SS) in isolated rat ventricular myocytes under ruptured whole-cell patch-clamp conditions. 3 A measure of 10 micro M DHA alone reduced I(TO), evoked by a pulse to +70 mV, by 74.8+/-10.8% (n=7) and activated a delayed outward current with kinetic properties different from I(SS). 4 When an antioxidant, alpha-tocopherol (1 micro M), was added together with DHA, the blockade of I(TO) was reduced to 38.5+/-7.7% (n=8) and the delayed outward current was not activated. alpha-Tocopherol alone had no effect on these currents. 5 When an oxidant, hydrogen peroxide (1 micro M), was applied together with DHA, the blockade of I(TO) was almost complete (98.4+/-1.0%, n=7) and a large delayed outward current was activated. A measure of 1 micro M hydrogen peroxide alone had no effect on these currents. 6 Measurements of nonperoxidized DHA in experimental solutions confirmed the negative relation between DHA concentration and the effects on the currents. 7 We conclude that rather than DHA itself, it is the peroxidation products of DHA that block I(TO) and activate a delayed outward current in in vitro single-cell experiments. These findings have important implications for the extrapolation of in vitro experimental findings to the antiarrhythmic effects of DHA in vivo because, in vivo, peroxidation of DHA is unlikely to occur.
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Affiliation(s)
- S Judé
- Nutrition Croissance et Cancer, Emi 0211 Inserm, Faculté de Médecine, 2 Bd Tonnellé, 37032 Tours Cedex, France
- Centre de Recherches Biologiques, Chemin de Montifault, 18800 Baugy, France
| | - S Bedut
- Nutrition Croissance et Cancer, Emi 0211 Inserm, Faculté de Médecine, 2 Bd Tonnellé, 37032 Tours Cedex, France
| | - S Roger
- Nutrition Croissance et Cancer, Emi 0211 Inserm, Faculté de Médecine, 2 Bd Tonnellé, 37032 Tours Cedex, France
| | - M Pinault
- Nutrition Croissance et Cancer, Emi 0211 Inserm, Faculté de Médecine, 2 Bd Tonnellé, 37032 Tours Cedex, France
| | - P Champeroux
- Centre de Recherches Biologiques, Chemin de Montifault, 18800 Baugy, France
| | - E White
- School of Biomedical Sciences, University of Leeds, Leeds LS2 9JT
| | - J-Y Le Guennec
- Nutrition Croissance et Cancer, Emi 0211 Inserm, Faculté de Médecine, 2 Bd Tonnellé, 37032 Tours Cedex, France
- Author for correspondence:
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Chajès V, Lavillonnière F, Ferrari P, Jourdan ML, Pinault M, Maillard V, Sébédio JL, Bougnoux P. Conjugated linoleic acid and the risk of breast cancer. IARC Sci Publ 2003; 156:203-4. [PMID: 12484165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Affiliation(s)
- V Chajès
- UPRES-E.A. 2103, Université François Rabelais, Tours, France
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Chajès V, Lavillonnière F, Ferrari P, Jourdan ML, Pinault M, Maillard V, Sébédio JL, Bougnoux P. Conjugated linoleic acid content in breast adipose tissue is not associated with the relative risk of breast cancer in a population of French patients. Cancer Epidemiol Biomarkers Prev 2002; 11:672-3. [PMID: 12101117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Affiliation(s)
- Véronique Chajès
- Laboratoire de Biologie des Tumeurs, Université F. Rabelais, Tours, France.
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Maillard V, Bougnoux P, Ferrari P, Jourdan ML, Pinault M, Lavillonnière F, Body G, Le Floch O, Chajès V. N-3 and N-6 fatty acids in breast adipose tissue and relative risk of breast cancer in a case-control study in Tours, France. Int J Cancer 2002; 98:78-83. [PMID: 11857389 DOI: 10.1002/ijc.10130] [Citation(s) in RCA: 192] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Experimental studies have indicated that n-3 fatty acids, including alpha-linolenic acid (18:3 n-3) and long-chain n-3 polyunsaturated fatty acids inhibit mammary tumor growth and metastasis. Earlier epidemiological studies have given inconclusive results about a potential protective effect of dietary n-3 polyunsaturated fatty acids on breast cancer risk, possibly because of methodological issues inherent to nutritional epidemiology. To evaluate the hypothesis that n-3 fatty acids protect against breast cancer, we examined the fatty acid composition in adipose tissue from 241 patients with invasive, nonmetastatic breast carcinoma and from 88 patients with benign breast disease, in a case-control study in Tours, central France. Fatty acid composition in breast adipose tissue was used as a qualitative biomarker of past dietary intake of fatty acids. Biopsies of adipose tissue were obtained at the time of surgery. Individual fatty acids were measured as a percentage of total fatty acids, using capillary gas chromatography. Unconditional logistic regression modeling was used to obtain odds ratio estimates while adjusting for age, height, menopausal status and body mass index. We found inverse associations between breast cancer-risk and n-3 fatty acid levels in breast adipose tissue. Women in the highest tertile of alpha-linolenic acid (18:3 n-3) had an odds ratio of 0.39 (95% confidence intervals [CI] = 0.19-0.78) compared to women in the lowest tertile (trend p = 0.01). In a similar way, women in the highest tertile of docosahexaenoic acid (22:6 n-3) had an odds ratio of 0.31 (95% CI = 0.13-0.75) compared to women in the lowest tertile (trend p = 0.016). Women in the highest tertile of the long-chain n-3/total n-6 ratio had an odds ratio of 0.33 (95% confidence interval = 0.17-0.66) compared to women in the lowest tertile (trend p = 0.0002). In conclusion, our data based on fatty acids levels in breast adipose tissue suggest a protective effect of n-3 fatty acids on breast cancer risk and support the hypothesis that the balance between n-3 and n-6 fatty acids plays a role in breast cancer.
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Affiliation(s)
- Virginie Maillard
- Laboratoire de Biologie des Tumeurs, Clinique d'Oncologie-Radiothérapie, Service de Gynécologie-Obstétrique, E.A. 2103, Unité de Recherche Associée Université-INRA, CHU, Tours, France
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Maillard V, Hoinard C, Steghens JP, Jourdan ML, Pinault M, Bougnoux P, Chajès V. Interaction of dietary beta-carotene and alpha-linolenic acid: effect on promotion of experimental mammary tumours. IARC Sci Publ 2002; 156:403-4. [PMID: 12484221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Affiliation(s)
- V Maillard
- Nutrition, Croissance et Cancer, UPRES-EA 2103, Université François Rabelais, Tours, France
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Klein V, Chajès V, Germain E, Schulgen G, Pinault M, Malvy D, Lefrancq T, Fignon A, Le Floch O, Lhuillery C, Bougnoux P. Low alpha-linolenic acid content of adipose breast tissue is associated with an increased risk of breast cancer. Eur J Cancer 2000; 36:335-40. [PMID: 10708934 DOI: 10.1016/s0959-8049(99)00254-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Data derived from experimental studies suggest that alpha-linolenic acid may have a protective effect in breast cancer. Observations obtained from epidemiological studies have not allowed conclusions to be drawn about a potential protective effect of dietary alpha-linolenic acid on breast cancer, possibly because of methodological issues. This case-control study conducted in an homogeneous population from a central area in France was designed to explore the hypothesis that alpha-linolenic acid inhibits breast cancer, using fatty acid levels in adipose breast tissue as a biomarker of past qualitative dietary intake of fatty acids. Biopsies of adipose breast tissue at the time of diagnosis were obtained from 123 women with invasive non-metastatic breast carcinoma. 59 women with benign breast disease served as controls. Individual fatty acids were analysed by capillary gas chromatography. An unconditional logistic regression model was used to obtain odds ratio estimates whilst adjusting for age, menopausal status and body mass index (BMI). No association was found between fatty acids (saturates, monounsaturates, long-chain polyunsaturates n-6 or n-3) and the disease, except for alpha-linolenic acid which showed an inverse association with the risk of breast cancer. The relative risk of breast cancer for women in the highest quartile of adipose breast tissue alpha-linolenic acid level was 0.36 (95% confidence interval=0.12-1.02) compared with those in the lowest quartile (P trend=0.026), suggesting a protective effect of alpha-linolenic acid in the risk of breast cancer. The effects of dietary alpha-linolenic on the risk of breast cancer warrant further study.
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Affiliation(s)
- V Klein
- Laboratoire de Biologie des Tumeurs, d'anatomo-pathologie, Clinique d'Oncologie-Radiothérapie, Service de Gynécologie-Obstétrique, E. A. 2103, Unité de Recherche Associée Université-INRA, CHU, Tours, France
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Delarue J, Maingourd C, Objois M, Pinault M, Cohen R, Couet C, Lamisse F. Effects of an amino acid dialysate on leucine metabolism in continuous ambulatory peritoneal dialysis patients. Kidney Int 1999; 56:1934-43. [PMID: 10571805 DOI: 10.1046/j.1523-1755.1999.00723.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Protein-energy malnutrition is frequent in continuous ambulatory peritoneal dialysis (CAPD) patients. The use of amino acids in the dialysate could improve the protein balance, especially if associated to a concomitant energy intake. METHODS A 1.1% amino acid solution for peritoneal dialysis was administered to CAPD patients over 30 minutes during concomitant absorption of 600 ml water (control study) or of a 600 kcal meal/600 ml. Leucine metabolism was studied using the combination of intravenous [2H3] and intraperitoneal [13C] leucine. RESULTS The rate of leucine appearance was stimulated by 56 and 53% (control and meal) at 45 minutes. The rates of leucine appearance and disappearance were lower from 180 to 300 minutes during the meal versus control study (P < 0.05). Proteolysis was unaffected during the control study and was inhibited by 25% during the meal study (P < 0.05). During the five-hour cycle dialysis with or without a meal, 80% of the leucine administered into the peritoneum was absorbed. Forty-one percent was retained in the splanchnic bed. Forty-three percent was used for protein synthesis, and 16% was oxidized. CONCLUSIONS This amino acids solution is efficaciously utilized for protein synthesis in CAPD patients with no effect on protein breakdown. The concomitant ingestion of a carbohydrate-lipid meal inhibits protein breakdown and reinforces a positive effect of the amino acids solution on protein balance.
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Affiliation(s)
- J Delarue
- Laboratoire de Nutrition de Tours, Association Régionale dAide aux Urémiques du Center Ouest, Hôpital Neuro-cardiologique, Lyon, France.
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Guesnet P, Pugo-Gunsam P, Maurage C, Pinault M, Giraudeau B, Alessandri JM, Durand G, Antoine JM, Couet C. Blood lipid concentrations of docosahexaenoic and arachidonic acids at birth determine their relative postnatal changes in term infants fed breast milk or formula. Am J Clin Nutr 1999; 70:292-8. [PMID: 10426708 DOI: 10.1093/ajcn.70.2.292] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Factors other than dietary fatty acids could be involved in the variability observed in blood docosahexaenoate (22:6n-3) and arachidonate (20:4n-6) status in formula-fed infants. OBJECTIVE We considered the 22:6n-3 and 20:4n-6 status at birth to be one of these factors and studied its influence on postnatal changes in term infants fed 4 different diets. DESIGN The blood phospholipid composition was determined at birth and on day 42 of feeding in 83 term infants fed breast milk, nonsupplemented formula, or 2 different 22:6n-3-supplemented formulas. Relations between 22:6n-3 and 20:4n-6 status at birth and their relative postnatal changes, calculated by the difference between status at the end of the feeding period (6 wk of age) and at birth, were assessed. RESULTS Postnatal changes in the plasma and erythrocyte phospholipids 22:6n-3 and 20:4n-6 were negatively related to their respective concentrations at birth (P < 0.01) and the slopes of the regression lines were not significantly affected by the type of milk ingested. Adjusted mean values for phospholipid 22:6n-3 in nonsupplemented-formula-fed infants and for 20:4n-6 in formula-fed infants decreased significantly more than they did in the other infant groups (P < 0.02). The status at birth and the type of milk ingested explained 33-64% and 7-47%, respectively, of the variability in postnatal changes. CONCLUSIONS The status of 22:6n-3 and 20:4n-6 at birth in term infants is one of the major determinants of postnatal changes in these fatty acids. This finding indicates that research is required to characterize environmental, genetic, or both factors, which, in addition to maternal diet, could influence fatty acid status at birth.
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Affiliation(s)
- P Guesnet
- Equipe Associée Lipides et Croissance, Université de Tours, Tours and Institut National de la Recherche Agronomique, Jouy-en-Josas.
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Maurage C, Guesnet P, Pinault M, Rochette de Lempdes J, Durand G, Antoine J, Couet C. Effect of two types of fish oil supplementation on plasma and erythrocyte phospholipids in formula-fed term infants. Biol Neonate 1998; 74:416-29. [PMID: 9784633 DOI: 10.1159/000014063] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We studied the effect of docosahexaenoic acid (DHA) supplementation of infant formulas on fatty acid composition of blood phospholipids in term infants. Two fish oil supplemented formulas containing 0.45 wt% DHA and high (0.35%) or low (0.10%) eicosapentaenoic acid (EPA) were fed for 42 days and compared with a standard formula and breast milk. Infants fed supplemented formulas and breast milk had similar time-dependent changes for DHA from birth to day 42, i.e., slight decreases in plasma phospholipids and erythrocyte phosphatidylcholine and no change in erythrocyte phosphatidylethanolamine. Low-EPA formula prevented EPA accumulation but did not limit the significant decrease in arachidonic acid (AA) noted in infants fed high-EPA formula. These results suggest that term infant formulas should be supplemented with DHA-rich EPA, low fish oil and AA to achieve a fatty acid status in formula-fed infants similar to that of breast-fed infants.
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Affiliation(s)
- C Maurage
- Equipe Associée, Université de Tours EA2103-INRA, Laboratoire de Nutrition et Securité Alimentaire, Jouy-en-Josas, France
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Tranchant T, Besson P, Hoinard C, Pinault M, Alessandri JM, Delarue J, Couet C, Goré J. Long-term supplementation of culture medium with essential fatty acids alters α-linolenic acid uptake in Caco-2 clone TC7. Can J Physiol Pharmacol 1998. [DOI: 10.1139/y98-071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the influence of four different culture media: 20% fetal bovine serum (FBS), 5% FBS, 5% FBS supplemented with 10 mg·L-1 linoleic acid (18:2(n-6)) or alpha-linolenic acid (18:3(n-3)) on alpha-linolenic acid apical uptake in clone TC7 of human intestinal Caco-2 cell line. Neither cellular viability nor cell monolayer integrity and permeability were altered by the four culture conditions. Our results show that the different culture media led to changes in alpha-linolenic acid maximal rate of uptake (Vmax) but did not alter the apparent transport constant (Km). Reducing FBS concentration from 20% to 5% increased significantly the rate of alpha-linolenic acid uptake, which was further increased by supplementation of the medium with 18:2(n-6) or 18:3(n-3). Supplementation with essential fatty acids led to a marked enrichment of brush-border membrane phospholipids in polyunsaturated fatty acids of the corresponding series and decreased significantly the levels of monounsaturated fatty acids. Saturated fatty acids, unsaturation index, and cholesterol / fatty acid ratios were unchanged. No clear relation could be established between the changes in membrane lipid composition and the alterations of alpha-linolenic acid uptake. These results indicate a weak influence of membrane lipid composition in the modulation of the uptake. Therefore, the increase of uptake following long-term supplementation of TC7 cells with essential fatty acids could be attributed to an increase of the expression of membrane protein(s) involved in the apical uptake of long-chain fatty acids. This remains to be established.Key words: fatty acid intestinal absorption, Caco-2 cells, membrane fatty acid transport protein, membrane phospholipid fatty acid composition.
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Tranchant T, Besson P, Hoinard C, Pinault M, Alessandri JM, Delarue J, Couet C, Goré J. Long-term supplementation of culture medium with essential fatty acids alters alpha-linolenic acid uptake in Caco-2 clone TC7. Can J Physiol Pharmacol 1998; 76:621-9. [PMID: 9923400 DOI: 10.1139/cjpp-76-6-621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the influence of four different culture media: 20% fetal bovine serum (FBS), 5% FBS, 5% FBS supplemented with 10 mg x L(-1) linoleic acid (18:2(n-6)) or alpha-linolenic acid (18:3(n-3)) on alpha-linolenic acid apical uptake in clone TC7 of human intestinal Caco-2 cell line. Neither cellular viability nor cell monolayer integrity and permeability were altered by the four culture conditions. Our results show that the different culture media led to changes in alpha-linolenic acid maximal rate of uptake (Vmax) but did not alter the apparent transport constant (Km). Reducing FBS concentration from 20% to 5% increased significantly the rate of alpha-linolenic acid uptake, which was further increased by supplementation of the medium with 18:2(n-6) or 18:3(n-3). Supplementation with essential fatty acids led to a marked enrichment of brush-border membrane phospholipids in polyunsaturated fatty acids of the corresponding series and decreased significantly the levels of monounsaturated fatty acids. Saturated fatty acids, unsaturation index, and cholesterol/fatty acid ratios were unchanged. No clear relation could be established between the changes in membrane lipid composition and the alterations of alpha-linolenic acid uptake. These results indicate a weak influence of membrane lipid composition in the modulation of the uptake. Therefore, the increase of uptake following long-term supplementation of TC7 cells with essential fatty acids could be attributed to an increase of the expression of membrane protein(s) involved in the apical uptake of long-chain fatty acids. This remains to be established.
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Affiliation(s)
- T Tranchant
- EA 2103, Unité de Recherche Associée (URA) Université-Institut national de la recherche agronomique, Faculté de Médecine, Tours, France
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