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Renaud EA, Maupin AJM, Bordat Y, Graindorge A, Berry L, Besteiro S. Iron depletion has different consequences on the growth and survival of Toxoplasma gondii strains. Virulence 2024; 15:2329566. [PMID: 38509723 PMCID: PMC10962585 DOI: 10.1080/21505594.2024.2329566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/07/2024] [Indexed: 03/22/2024] Open
Abstract
Toxoplasma gondii is an obligate intracellular parasite responsible for a pathology called toxoplasmosis, which primarily affects immunocompromised individuals and developing foetuses. The parasite can scavenge essential nutrients from its host to support its growth and survival. Among them, iron is one of the most important elements needed to sustain basic cellular functions as it is involved in a number of key metabolic processes, including oxygen transport, redox balance, and electron transport. We evaluated the effects of an iron chelator on the development of several parasite strains and found that they differed in their ability to tolerate iron depletion. The growth of parasites usually associated with a model of acute toxoplasmosis was strongly affected by iron depletion, whereas cystogenic strains were less sensitive as they were able to convert into persisting developmental forms that are associated with the chronic form of the disease. Ultrastructural and biochemical characterization of the impact of iron depletion on parasites also highlighted striking changes in both their metabolism and that of the host, with a marked accumulation of lipid droplets and perturbation of lipid homoeostasis. Overall, our study demonstrates that although acute iron depletion has an important effect on the growth of T. gondii, it has a more profound impact on actively dividing parasites, whereas less metabolically active parasite forms may be able to avoid some of the most detrimental consequences.
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Affiliation(s)
- Eléa A. Renaud
- LPHI, University Montpellier, Inserm, CNRS, Montpellier, France
| | | | - Yann Bordat
- LPHI, University Montpellier, Inserm, CNRS, Montpellier, France
| | | | - Laurence Berry
- LPHI, University Montpellier, Inserm, CNRS, Montpellier, France
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2
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Lichtenstein L, Cheng CW, Bajarwan M, Evans EL, Gaunt HJ, Bartoli F, Chuntharpursat-Bon E, Patel S, Konstantinou C, Futers TS, Reay M, Parsonage G, Moore JB, Bertrand-Michel J, Sukumar P, Roberts LD, Beech DJ. Endothelial force sensing signals to parenchymal cells to regulate bile and plasma lipids. SCIENCE ADVANCES 2024; 10:eadq3075. [PMID: 39331703 PMCID: PMC11430402 DOI: 10.1126/sciadv.adq3075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 08/21/2024] [Indexed: 09/29/2024]
Abstract
How cardiovascular activity interacts with lipid homeostasis is incompletely understood. We postulated a role for blood flow acting at endothelium in lipid regulatory organs. Transcriptome analysis was performed on livers from mice engineered for deletion of the flow-sensing PIEZO1 channel in endothelium. This revealed unique up-regulation of Cyp7a1, which encodes the rate-limiting enzyme for bile synthesis from cholesterol in hepatocytes. Consistent with this effect were increased gallbladder and plasma bile acids and lowered hepatic and plasma cholesterol. Elevated portal fluid flow acting via endothelial PIEZO1 and genetically enhanced PIEZO1 conversely suppressed Cyp7a1. Activation of hepatic endothelial PIEZO1 channels promoted phosphorylation of nitric oxide synthase 3, and portal flow-mediated suppression of Cyp7a1 depended on nitric oxide synthesis, suggesting endothelium-to-hepatocyte coupling via nitric oxide. PIEZO1 variants in people were associated with hepatobiliary disease and dyslipidemia. The data suggest an endothelial force sensing mechanism that controls lipid regulation in parenchymal cells to modulate whole-body lipid homeostasis.
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Affiliation(s)
- Laeticia Lichtenstein
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK
| | - Chew W. Cheng
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | - Muath Bajarwan
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | | | | | - Fiona Bartoli
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | | | - Shaili Patel
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
- Department of Hepatobiliary and Transplant Surgery, St James's University Hospital, Leeds LS9 7TF, UK
| | - Charalampos Konstantinou
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
- Department of Hepatobiliary and Transplant Surgery, St James's University Hospital, Leeds LS9 7TF, UK
| | | | - Melanie Reay
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | | | - J. Bernadette Moore
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK
| | - Justine Bertrand-Michel
- MetaToul-Lipidomics Facility, INSERM UMR1048, Toulouse, France
- Institut des Maladies Métaboliques et Cardiovasculaires, UMR 1297/I2MC, INSERM, Toulouse, France
| | | | - Lee D. Roberts
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | - David J. Beech
- School of Medicine, University of Leeds, Leeds LS2 9JT, UK
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3
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Gaigé S, Abysique A, Barbouche R, Tonetto A, Di Maio A, Robin M, Lormier AT, Troadec JD. 3,5-Dimethyl-2,4,6-trimethoxychalcone Lessens Obesity and MAFLD in Leptin-Deficient ob/ob Mice. Int J Mol Sci 2024; 25:9838. [PMID: 39337328 PMCID: PMC11432508 DOI: 10.3390/ijms25189838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Revised: 09/03/2024] [Accepted: 09/06/2024] [Indexed: 09/30/2024] Open
Abstract
Chalcones constitute an important group of natural compounds abundant in fruits and comestible plants. They are a subject of increasing interest because of their biological activities, including anti-diabetic and anti-obesity effects. The simple chalcone structural scaffold can be modified at multiple sites with different chemical moieties. Here, we generated an artificial chalcone, i.e., 3,5-dimethyl-2,4,6-trimethoxychalcone (TriMetChalc), derived from 2',4'-Dihydroxy-6'-methoxy-3',5'-dimethylchalcone (DMC). DMC is a major compound of Cleistocalyx operculatus, a plant widely used in Asia for its anti-hyperglycemic activity. Using ob/ob mice as an obesity model, we report that, after 3 weeks of per os administration, TriMetChalc modified food intake through the specific activation of brain structures dedicated to the regulation of energy balance. TriMetChalc also decreased weight gain, glucose intolerance, and hepatic steatosis. Moreover, through extensive liver lipidomic analysis, we identified TriMetChalc-induced modifications that could contribute to improving the liver status of the animals. Hence, TriMetChalc is a chalcone derivative capable of reducing food intake and the addition of glucose intolerance and hepatic steatosis in a mouse model of obesity. In light of these results, we believe that TriMetChalc action deserves to be more deeply evaluated over longer treatment periods and/or in combination with other chalcones with protective effects on the liver.
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Affiliation(s)
- Stéphanie Gaigé
- Centre de Recherche en Psychologie et Neurosciences (CRPN), UMR CNRS UMR 7077, Aix-Marseille University, 13331 Marseille, France; (S.G.); (A.A.); (R.B.)
| | - Anne Abysique
- Centre de Recherche en Psychologie et Neurosciences (CRPN), UMR CNRS UMR 7077, Aix-Marseille University, 13331 Marseille, France; (S.G.); (A.A.); (R.B.)
| | - Rym Barbouche
- Centre de Recherche en Psychologie et Neurosciences (CRPN), UMR CNRS UMR 7077, Aix-Marseille University, 13331 Marseille, France; (S.G.); (A.A.); (R.B.)
| | - Alain Tonetto
- PRATIM, FSCM (FR1739), Centrale Marseille, CNRS, Aix-Marseille University, 13397 Marseille, France;
| | - Attilio Di Maio
- Mediterranean Institute of Marine and Terrestrial Biodiversity and Ecology, IRD, CNRS UMR7263, Aix-Marseille University, 13013 Marseille, France; (A.D.M.); (M.R.)
- Mediterranean Institute of Marine and Terrestrial Biodiversity and Ecology, IRD, NRS UMR7263, Avignon University, 84029 Avignon, France
| | - Maxime Robin
- Mediterranean Institute of Marine and Terrestrial Biodiversity and Ecology, IRD, CNRS UMR7263, Aix-Marseille University, 13013 Marseille, France; (A.D.M.); (M.R.)
- Mediterranean Institute of Marine and Terrestrial Biodiversity and Ecology, IRD, NRS UMR7263, Avignon University, 84029 Avignon, France
- CAYLAB, Contract Research Organization, 13180 Istres, France
| | | | - Jean-Denis Troadec
- Centre de Recherche en Psychologie et Neurosciences (CRPN), UMR CNRS UMR 7077, Aix-Marseille University, 13331 Marseille, France; (S.G.); (A.A.); (R.B.)
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4
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Bourdon G, Chevaleyre C, Estienne A, Péchoux C, Bourgeais J, Hérault O, Ba M, Ramé C, Dupont J, Ducluzeau PH, Froment P. The hepatokine FGF21 stopped lipogenesis and reduced testosterone production in mLTC-1 Leydig Cell Line. Mol Cell Endocrinol 2024; 594:112350. [PMID: 39233040 DOI: 10.1016/j.mce.2024.112350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 08/05/2024] [Accepted: 08/31/2024] [Indexed: 09/06/2024]
Abstract
Beyond their link to metabolic issues like type 2 diabetes, factors like lifestyle, environment, and excess weight may also influence fertility. Fibroblast growth factor 21 (FGF21), a liver-derived hormone linked to energy balance, has recently emerged as a potential player in female mammalian reproduction. In male, only two studies have described potential effects of FGF21 on fertility. A recent study has described a negative correlation observed in obese patients presenting a low testosterone level associated with elevated FGF21 plasma levels. To investigate the role of FGF21 in steroidogenesis, we have studied the involvement of FGF21 in lipid and steroid activity by Leydig cells. Leydig cell model expressed all FGF21 receptors and β-Klotho cofactor as determined by RT-qPCR and by western-blot. Cultured mLTC-1 Leydig cell line exposed to increasing FGF21 concentration induced phosphorylation (Ser 473) of Akt and modified the CREB factor activity, suggesting the functionality of the FGF21 pathway. FGF21 consequences on mLTC-1 Leydig cells are inhibition of the lipid synthesis, leading to a reduction in the content of lipid droplets. The drop in lipid synthesis is associated with a reduction in the amount of lipids (mainly PUFA, cholesterol esterified, and triglycerides) as measured by lipidomic approach. The main consequence is to reduce the quantity of cholesterol, the steroid precursor, in mLTC-1 Leydig cells and is associated with a low production in testosterone. The decrease in androgens was also associated with a reduction in the steroid enzyme genes expression, which are under the control of CREB activity, and present a lower activity due to low cAMP intracellular levels. In vivo, steroid production was lowering after FGF21 administration in adult male mice associated to a decrease in progressive motility and velocity of sperm. In addition, these experimental data are reinforced by a data mining analysis focused on "gonad" terms in 1,319,905 article references showing the link already described between FGF21 with the fatty acids pathways, cholesterol storage, and steroid production. In conclusion, we demonstrated that Leydig cells in the testes present a functional FGF21 pathway, which regulates lipid metabolism and steroid function. In mLTC-1 Leydig cells, FGF21 reduced cholesterol, PUFA content, and testosterone production. Finally, this work highlighted that the hepatokine FGF21 could have a negative impact on androgen synthesis and testicular activity.
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Affiliation(s)
- Guillaume Bourdon
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Claire Chevaleyre
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Anthony Estienne
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, 78350, Jouy-en-Josas, France
| | - Jérôme Bourgeais
- INSERM UMR 1069 N2C, Team LNOx, Tours University, 37000, Tours, France
| | - Olivier Hérault
- INSERM UMR 1069 N2C, Team LNOx, Tours University, 37000, Tours, France
| | - Mouhamadou Ba
- Université Paris-Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France; Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France
| | - Christelle Ramé
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Joëlle Dupont
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Pierre-Henri Ducluzeau
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France; Internal Medicine Department, Unit of Endocrinology, CHRU Tours, F-37044, Tours, France
| | - Pascal Froment
- INRAE UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France.
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5
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Coilly A, Desterke C, Kaščáková S, Chiappini F, Samuel D, Vibert E, Guettier C, Le Naour F. Clinical Application of Infrared Spectroscopy in Liver Transplantation for Rapid Assessment of Lipid Content in Liver Graft. J Transl Med 2024; 104:102110. [PMID: 39004345 DOI: 10.1016/j.labinv.2024.102110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 07/02/2024] [Accepted: 07/08/2024] [Indexed: 07/16/2024] Open
Abstract
Liver transplantation (LT) is a major treatment for patients with end-stage liver diseases. Steatosis is a significant risk factor for primary graft nonfunction and associated with poor long-term graft outcomes. Traditionally, the evaluation of steatosis is based on frozen section examination to estimate the percentage of hepatocytes containing lipid vesicles. However, this visual evaluation correlates poorly with the true lipid content. This study aimed to address the potential of infrared (IR) microspectroscopy for rapidly estimating lipid content in the context of LT and assessing its impact on survival. Clinical data were collected for >20 months from 58 patients who underwent transplantation. For each liver graft, macrovacuolar steatosis and microvesicular steatosis were evaluated through histologic examination of frozen tissue section. Triglycerides (TG) were further quantified using gas phase chromatography coupled with a flame ionization detector (GC-FID) and estimated by IR microspectroscopy. A linear relationship and significant correlation were observed between the TG measured by GC-FID and those estimated using IR microspectroscopy (R2 = 0.86). In some cases, microvesicular steatosis was related to high lipid content despite low levels of macrovacuolar steatosis. Seven patients experienced posttransplantation liver failure, including 5 deceased patients. All patients underwent transplantation with grafts containing significantly high TG levels. A concentration of 250 nmol/mg was identified as the threshold above which the risk of failure after LT significantly increased, affecting 35% of patients. Our study established a strong correlation between LT outcomes and lipid content. IR microspectroscopy proved to be a rapid and reliable approach for assessing the lipid content in clinical settings.
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Affiliation(s)
- Audrey Coilly
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France; AP-HP Hôpital Paul Brousse, Centre Hépatobiliaire, Villejuif, France
| | - Christophe Desterke
- Université Paris Saclay, Institut André Lwoff, Villejuif, France; Inserm, US33, Villejuif, France
| | - Slávka Kaščáková
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France
| | - Franck Chiappini
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France
| | - Didier Samuel
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France; AP-HP Hôpital Paul Brousse, Centre Hépatobiliaire, Villejuif, France
| | - Eric Vibert
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France; AP-HP Hôpital Paul Brousse, Centre Hépatobiliaire, Villejuif, France
| | - Catherine Guettier
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France; AP-HP Hôpital Bicêtre, Service d'Anatomopathologie, Kremlin-Bicêtre, France.
| | - François Le Naour
- Inserm, Unité 1193, Villejuif, France; Université Paris Saclay, Institut André Lwoff, Villejuif, France; Inserm, US33, Villejuif, France.
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6
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Thomas SR, Zhang Y, Rye KA. The pleiotropic effects of high-density lipoproteins and apolipoprotein A-I. Best Pract Res Clin Endocrinol Metab 2022; 37:101689. [PMID: 36008277 DOI: 10.1016/j.beem.2022.101689] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The high density lipoprotein (HDL) fraction of human plasma consists of multiple subpopulations of spherical particles that are structurally uniform, but heterogeneous in terms of size, composition and function. Numerous epidemiological studies have established that an elevated high density lipoprotein cholesterol (HDL-C) level is associated with decreased cardiovascular risk. However, with several recent randomised clinical trials of HDL-C raising agents failing to reduce cardiovascular events, contemporary research is transitioning towards clinical development of the cardioprotective functions of HDLs and the identification of functions that can be exploited for treatment of other diseases. This review describes the origins of HDLs and the causes of their compositional and functional heterogeneity. It then summarises current knowledge of how cardioprotective and other functions of HDLs are regulated. The final section of the review summarises recent advances in the clinical development of HDL-targeted therapies.
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Affiliation(s)
- Shane R Thomas
- Cardiometabolic Disease Research Group, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
| | - Yunjia Zhang
- Cardiometabolic Disease Research Group, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
| | - Kerry-Anne Rye
- Cardiometabolic Disease Research Group, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
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7
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Platelet Lipidome Fingerprint: New Assistance to Characterize Platelet Dysfunction in Obesity. Int J Mol Sci 2022; 23:ijms23158326. [PMID: 35955459 PMCID: PMC9369067 DOI: 10.3390/ijms23158326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/21/2022] [Accepted: 07/21/2022] [Indexed: 11/27/2022] Open
Abstract
Obesity is associated with a pro-inflammatory and pro-thrombotic state that supports atherosclerosis progression and platelet hyper-reactivity. During the last decade, the platelet lipidome has been considered a treasure trove, as it is a source of biomarkers for preventing and treating different pathologies. The goal of the present study was to determine the lipid profile of platelets from non-diabetic, severely obese patients compared with their age- and sex-matched lean controls. Lipids from washed platelets were isolated and major phospholipids, sphingolipids and neutral lipids were analyzed either by gas chromatography or by liquid chromatography coupled to mass spectrometry. Despite a significant increase in obese patient’s plasma triglycerides, there were no significant differences in the levels of triglycerides in platelets among the two groups. In contrast, total platelet cholesterol was significantly decreased in the obese group. The profiling of phospholipids showed that phosphatidylcholine and phosphatidylethanolamine contents were significantly reduced in platelets from obese patients. On the other hand, no significant differences were found in the sphingomyelin and ceramide levels, although there was also a tendency for reduced levels in the obese group. The outline of the glycerophospholipid and sphingolipid molecular species (fatty-acyl profiles) was similar in the two groups. In summary, these lipidomics data indicate that platelets from obese patients have a unique lipid fingerprint that may guide further studies and provide mechanistic-driven perspectives related to the hyperactivate state of platelets in obesity.
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8
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Rich MK, Vigneron N, Libourel C, Keller J, Xue L, Hajheidari M, Radhakrishnan GV, Le Ru A, Diop SI, Potente G, Conti E, Duijsings D, Batut A, Le Faouder P, Kodama K, Kyozuka J, Sallet E, Bécard G, Rodriguez-Franco M, Ott T, Bertrand-Michel J, Oldroyd GED, Szövényi P, Bucher M, Delaux PM. Lipid exchanges drove the evolution of mutualism during plant terrestrialization. Science 2021; 372:864-868. [PMID: 34016782 DOI: 10.1126/science.abg0929] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/26/2021] [Indexed: 12/13/2022]
Abstract
Symbiosis with arbuscular mycorrhizal fungi (AMF) improves plant nutrition in most land plants, and its contribution to the colonization of land by plants has been hypothesized. Here, we identify a conserved transcriptomic response to AMF among land plants, including the activation of lipid metabolism. Using gain of function, we show the transfer of lipids from the liverwort Marchantia paleacea to AMF and its direct regulation by the transcription factor WRINKLED (WRI). Arbuscules, the nutrient-exchange structures, were not formed in loss-of-function wri mutants in M. paleacea, leading to aborted mutualism. Our results show the orthology of the symbiotic transfer of lipids across land plants and demonstrate that mutualism with arbuscular mycorrhizal fungi was present in the most recent ancestor of land plants 450 million years ago.
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Affiliation(s)
- Mélanie K Rich
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France
| | - Nicolas Vigneron
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France
| | - Cyril Libourel
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France
| | - Jean Keller
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France
| | - Li Xue
- Institute for Plant Sciences, Cologne Biocenter, Cluster of Excellence on Plant Sciences, University of Cologne, D-50674 Cologne, Germany.,College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Mohsen Hajheidari
- Institute for Plant Sciences, Cologne Biocenter, Cluster of Excellence on Plant Sciences, University of Cologne, D-50674 Cologne, Germany
| | | | - Aurélie Le Ru
- Fédération de Recherche 3450, Plateforme Imagerie, Pôle de Biotechnologie Végétale, 31326 Castanet-Tolosan, France
| | - Seydina Issa Diop
- Department of Systematic and Evolutionary Botany, University of Zurich, 8008 Zurich, Switzerland.,Zurich-Basel Plant Science Center, 8092 Zurich, Switzerland
| | - Giacomo Potente
- Department of Systematic and Evolutionary Botany, University of Zurich, 8008 Zurich, Switzerland.,Zurich-Basel Plant Science Center, 8092 Zurich, Switzerland
| | - Elena Conti
- Department of Systematic and Evolutionary Botany, University of Zurich, 8008 Zurich, Switzerland.,Zurich-Basel Plant Science Center, 8092 Zurich, Switzerland
| | | | - Aurélie Batut
- MetaToulLipidomics Facility, INSERM UMR1048, 31432 Toulouse, France
| | | | - Kyoichi Kodama
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Junko Kyozuka
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Erika Sallet
- Laboratory of Plant-Microbe Interactions (LIPM), Université de Toulouse, INRA, CNRS, 31326 Castanet-Tolosan, France
| | - Guillaume Bécard
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France
| | | | - Thomas Ott
- Cell Biology, Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany
| | | | - Giles E D Oldroyd
- John Innes Centre, Norwich NR4 7UH, UK.,Crop Science Centre, University of Cambridge, Cambridge CB2 3EA, UK
| | - Péter Szövényi
- Department of Systematic and Evolutionary Botany, University of Zurich, 8008 Zurich, Switzerland.,Zurich-Basel Plant Science Center, 8092 Zurich, Switzerland
| | - Marcel Bucher
- Institute for Plant Sciences, Cologne Biocenter, Cluster of Excellence on Plant Sciences, University of Cologne, D-50674 Cologne, Germany
| | - Pierre-Marc Delaux
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
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9
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Abstract
High-density lipoprotein (HDL) particles, best known for their anti-atherosclerotic effects, also may play a beneficial role during acute renal stress. HDL from healthy human beings also shows anti-inflammatory and anti-oxidant capacities, promotes endothelial function and repair, and serves as a systemic signaling mechanism facilitating rapid interorgan communication during times of physiologic stress. Higher concentrations of HDL are associated with less acute kidney injury after sepsis, cardiac and vascular surgery, and contrast-exposure during percutaneous coronary interventions. A better understanding of the interplay between HDL and the kidney both under homeostatic conditions and under acute physiologic stress could lead to the identification of novel risk factors and therapeutic targets for acute kidney injury prevention and treatment in the future.
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Affiliation(s)
- Loren E Smith
- Division of Multispecialty Adult Anesthesiology, Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN.
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10
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Pullinger CR, O’Connor PM, Naya‐Vigne JM, Kunitake ST, Movsesyan I, Frost PH, Malloy MJ, Kane JP. Levels of Prebeta-1 High-Density Lipoprotein Are a Strong Independent Positive Risk Factor for Coronary Heart Disease and Myocardial Infarction: A Meta-Analysis. J Am Heart Assoc 2021; 10:e018381. [PMID: 33728928 PMCID: PMC8174380 DOI: 10.1161/jaha.120.018381] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Background We previously showed that levels of prebeta-1 high-density lipoprotein (HDL), the principal acceptor of cholesterol effluxed from cells, including artery wall macrophages, are positively associated with coronary heart disease (CHD) and myocardial infarction (MI) risk. Methods and Results In a multiethnic follow-up cohort of 1249 individuals from University of California-San Francisco clinics, we determined the degree to which prebeta-1 HDL levels, both absolute and percentage of apolipoprotein AI, are associated with CHD and history of MI. Independent, strong, positive associations were found. Meta-analysis revealed for the absolute prebeta-1 HDL for the top tertile versus the lowest, unadjusted odds ratios of 1.90 (95% CI, 1.40-2.58) for CHD and 1.79 (95% CI, 1.35-2.36) for MI. For CHD, adjusting for established risk factors, the top versus bottom tertiles, quintiles, and deciles yielded sizable odds ratios of 2.37 (95% CI, 1.74-3.25, P<0.001), 3.20 (95% CI, 2.07-4.94, P<0.001), and 4.00 (95% CI, 2.11-7.58, P<0.001), respectively. Men and women were analyzed separately in a combined data set of 2507 individuals. The odds ratios for CHD and MI risk were similar. Higher levels of prebeta-1 HDL were associated with all 5 metabolic syndrome features. Addition of prebeta-1 HDL to these 5 features resulted in significant improvements in risk-prediction models. Conclusions Analysis of 2507 subjects showed conclusively that levels of prebeta-1 HDL are strongly associated with a history of CHD or MI, independently of traditional risk factors. Addition of prebeta-1 HDL can significantly improve clinical assessment of risk of CHD and MI.
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Affiliation(s)
- Clive R. Pullinger
- Cardiovascular Research InstituteUniversity of CaliforniaSan FranciscoCA
- Department of Physiological NursingUniversity of CaliforniaSan FranciscoCA
| | | | | | - Steven T. Kunitake
- Cardiovascular Research InstituteUniversity of CaliforniaSan FranciscoCA
| | - Irina Movsesyan
- Cardiovascular Research InstituteUniversity of CaliforniaSan FranciscoCA
| | - Philip H. Frost
- Cardiovascular Research InstituteUniversity of CaliforniaSan FranciscoCA
- Department of MedicineUniversity of CaliforniaSan FranciscoCA
| | - Mary J. Malloy
- Cardiovascular Research InstituteUniversity of CaliforniaSan FranciscoCA
- Department of MedicineUniversity of CaliforniaSan FranciscoCA
| | - John P. Kane
- Cardiovascular Research InstituteUniversity of CaliforniaSan FranciscoCA
- Department of MedicineUniversity of CaliforniaSan FranciscoCA
- Department of Biochemistry and BiophysicsUniversity of CaliforniaSan FranciscoCA
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11
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Mayeuf-Louchart A, Lancel S, Sebti Y, Pourcet B, Loyens A, Delhaye S, Duhem C, Beauchamp J, Ferri L, Thorel Q, Boulinguiez A, Zecchin M, Dubois-Chevalier J, Eeckhoute J, Vaughn LT, Roach PJ, Dani C, Pederson BA, Vincent SD, Staels B, Duez H. Glycogen Dynamics Drives Lipid Droplet Biogenesis during Brown Adipocyte Differentiation. Cell Rep 2020; 29:1410-1418.e6. [PMID: 31693883 PMCID: PMC7057258 DOI: 10.1016/j.celrep.2019.09.073] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 08/02/2019] [Accepted: 09/25/2019] [Indexed: 12/20/2022] Open
Abstract
Browning induction or transplantation of brown adipose tissue (BAT) or brown/beige adipocytes derived from progenitor or induced pluripotent stem cells (iPSCs) can represent a powerful strategy to treat metabolic diseases. However, our poor understanding of the mechanisms that govern the differentiation and activation of brown adipocytes limits the development of such therapy. Various genetic factors controlling the differentiation of brown adipocytes have been identified, although most studies have been performed using in vitro cultured pre-adipocytes. We investigate here the differentiation of brown adipocytes from adipose progenitors in the mouse embryo. We demonstrate that the formation of multiple lipid droplets (LDs) is initiated within clusters of glycogen, which is degraded through glycophagy to provide the metabolic substrates essential for de novo lipogenesis and LD formation. Therefore, this study uncovers the role of glycogen in the generation of LDs. Brown adipocytes are functionally differentiated at E17.5 in the mouse embryo Lipid droplets are formed within glycogen clusters Glycogen production is crucial for lipid droplet biogenesis during BAT differentiation Glycophagy-mediated glycogen degradation drives lipid droplet formation
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Affiliation(s)
- Alicia Mayeuf-Louchart
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France.
| | - Steve Lancel
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Yasmine Sebti
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Benoit Pourcet
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Anne Loyens
- Univ. Lille, UMR-S 1172-JPArc Centre de Recherche Jean-Pierre Aubert Neurosciences et Cancer, Lille, France
| | - Stéphane Delhaye
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Christian Duhem
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Justine Beauchamp
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Lise Ferri
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Quentin Thorel
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Alexis Boulinguiez
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Mathilde Zecchin
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Julie Dubois-Chevalier
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Jérôme Eeckhoute
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Logan T Vaughn
- Indiana University School of Medicine-Muncie and Ball State University, Muncie, IN 47306, USA
| | - Peter J Roach
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Christian Dani
- Université Côte d'Azur, CNRS, INSERM, iBV Faculté de Médecine, Nice, France
| | - Bartholomew A Pederson
- Indiana University School of Medicine-Muncie and Ball State University, Muncie, IN 47306, USA
| | - Stéphane D Vincent
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U1258 Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Bart Staels
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
| | - Hélène Duez
- Univ. Lille, INSERM, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France
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12
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Serum level of HDL particles are independently associated with long-term prognosis in patients with coronary artery disease: The GENES study. Sci Rep 2020; 10:8138. [PMID: 32424189 PMCID: PMC7234989 DOI: 10.1038/s41598-020-65100-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 04/27/2020] [Indexed: 01/07/2023] Open
Abstract
HDL-Cholesterol (HDL-C) is not an accurate surrogate marker to measure the cardioprotective functions of HDL in coronary artery diseases (CAD) patients. Hence, measurement of other HDL-related parameters may have prognostic superiority over HDL-C. In this work, we examined the predictive value of HDL particles profile for long-term mortality in CAD patients and to compare its informative value to that of HDL-C and apoA-I. HDL particles profiles were measured by nuclear magnetic resonance (NMR) spectroscopy in 214 male participants with stable CAD (45-74 years). Median follow up was 12.5 years with a 36.4% mortality rate. Cardiovascular mortality accounted for 64.5%. Mean concentrations of total HDL particles (HDL-P), small-sized HDL (SHDL-P) and apoA-I were lower in deceased than in surviving patients whereas no difference was observed according to HDL-C and large HDL particles. All NMR-HDL measures were correlated between themselves and with other HDL markers (HDL-C, apoA-I and LpA-I). In a multivariate model adjusted for cardiovascular risk factors and bioclinical variables, HDL-P and SHDL-P displayed the strongest inverse association with all-cause and cardiovascular mortality. Weaker associations were recorded for apoA-I. Based on our results, we conclude that HDL particle profile measured by NMR spectroscopy should be considered to better stratify risk in population at high risk or in the setting of pharmacotherapy.
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13
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Amiel A, Tremblay-Franco M, Gautier R, Ducheix S, Montagner A, Polizzi A, Debrauwer L, Guillou H, Bertrand-Michel J, Canlet C. Proton NMR Enables the Absolute Quantification of Aqueous Metabolites and Lipid Classes in Unique Mouse Liver Samples. Metabolites 2019; 10:metabo10010009. [PMID: 31877749 PMCID: PMC7023327 DOI: 10.3390/metabo10010009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 02/06/2023] Open
Abstract
Hepatic metabolites provide valuable information on the physiological state of an organism, and thus, they are monitored in many clinical situations. Typically, monitoring requires several analyses for each class of targeted metabolite, which is time consuming. The present study aimed to evaluate a proton nuclear magnetic resonance (1H-NMR) method for obtaining quantitative measurements of aqueous and lipidic metabolites. We optimized the extraction protocol, the standard samples, and the organic solvents for the absolute quantification of lipid species. To validate the method, we analyzed metabolic profiles in livers of mice fed three different diets. We compared our results with values obtained with conventional methods and found strong correlations. The 1H-NMR protocol enabled the absolute quantification of 29 aqueous metabolites and eight lipid classes. Results showed that mice fed a diet enriched in saturated fatty acids had higher levels of triglycerides, cholesterol ester, monounsaturated fatty acids, lactate, 3-hydroxy-butyrate, and alanine and lower levels of glucose, compared to mice fed a control diet. In conclusion, proton NMR provided a rapid overview of the main lipid classes (triglycerides, cholesterol, phospholipids, fatty acids) and the most abundant aqueous metabolites in liver.
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Affiliation(s)
- Aurélien Amiel
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
- Metatoul-AXIOM platform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toxalim, INRAE UMR 1331, F-31027 Toulouse, France
| | - Marie Tremblay-Franco
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
- Metatoul-AXIOM platform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toxalim, INRAE UMR 1331, F-31027 Toulouse, France
| | - Roselyne Gautier
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
- Metatoul-AXIOM platform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toxalim, INRAE UMR 1331, F-31027 Toulouse, France
| | - Simon Ducheix
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
| | - Alexandra Montagner
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
| | - Arnaud Polizzi
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
| | - Laurent Debrauwer
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
- Metatoul-AXIOM platform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toxalim, INRAE UMR 1331, F-31027 Toulouse, France
| | - Hervé Guillou
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
| | | | - Cécile Canlet
- Toxalim-Research Centre in Food Toxicology, Toulouse University, INRAE UMR 1331, ENVT, INP-Purpan, Paul Sabatier University, F-31027 Toulouse, France; (A.A.); (M.T.-F.); (R.G.); (S.D.); (A.M.); (A.P.); (L.D.); (H.G.)
- Metatoul-AXIOM platform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toxalim, INRAE UMR 1331, F-31027 Toulouse, France
- Correspondence:
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14
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Le Saux S, Aarrass H, Lai-Kee-Him J, Bron P, Armengaud J, Miotello G, Bertrand-Michel J, Dubois E, George S, Faklaris O, Devoisselle JM, Legrand P, Chopineau J, Morille M. Post-production modifications of murine mesenchymal stem cell (mMSC) derived extracellular vesicles (EVs) and impact on their cellular interaction. Biomaterials 2019; 231:119675. [PMID: 31838346 DOI: 10.1016/j.biomaterials.2019.119675] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 12/06/2019] [Indexed: 12/14/2022]
Abstract
In regards to their key role in intercellular communication, extracellular vesicles (EVs) have a strong potential as bio-inspired drug delivery systems (DDS). With the aim of circumventing some of their well-known issues (production yield, drug loading yield, pharmacokinetics), we specifically focused on switching the biological vision of these entities to a more physico-chemical one, and to consider and fine-tune EVs as synthetic vectors. To allow a rational use, we first performed a full physico-chemical (size, concentration, surface charge, cryoTEM), biochemical (western blot, proteomics, lipidomics, transcriptomics) and biological (cell internalisation) characterisation of murine mesenchymal stem cell (mMSC)-derived EVs. A stability study based on evaluating the colloidal behaviour of obtained vesicles was performed in order to identify optimal storage conditions. We evidenced the interest of using EVs instead of liposomes, in regards to target cell internalisation efficiency. EVs were shown to be internalised through a caveolae and cholesterol-dependent pathway, following a different endocytic route than liposomes. Then, we characterised the effect of physical methods scarcely investigated with EVs (extrusion through 50 nm membranes, freeze-drying, sonication) on EV size, concentration, structure and cell internalisation properties. Our extensive characterisation of the effect of these physical processes highlights their promise as loading methods to make EVs efficient delivery vehicles.
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Affiliation(s)
- Sarah Le Saux
- ICGM, Univ Montpellier, ENSCM, CNRS, Montpellier, France
| | - Hanna Aarrass
- ICGM, Univ Montpellier, ENSCM, CNRS, Montpellier, France
| | | | - Patrick Bron
- CBS, Univ Montpellier, INSERM, CNRS, Montpellier, France
| | - Jean Armengaud
- Laboratory «Innovative technologies for Detection and Diagnostics», CEA-Marcoule, DRF/JOLIOT/DMTS/SPI/Li2D, Bagnols-sur-Cèze, France
| | - Guylaine Miotello
- Laboratory «Innovative technologies for Detection and Diagnostics», CEA-Marcoule, DRF/JOLIOT/DMTS/SPI/Li2D, Bagnols-sur-Cèze, France
| | - Justine Bertrand-Michel
- MetaToul-LIPIDOMIQUE, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC) Inserm/Université Paul Sabatier UMR1048, Toulouse, France
| | - Emeric Dubois
- MGX-Montpellier GenomiX, IGF, CNRS, INSERM, Univ Montpellier, Montpellier, France
| | - Simon George
- MGX-Montpellier GenomiX, IGF, CNRS, INSERM, Univ Montpellier, Montpellier, France
| | - Orestis Faklaris
- Montpellier Ressources Imagerie, Biocampus, CNRS, INSERM, Univ Montpellier, Montpellier, France
| | | | | | - Joël Chopineau
- ICGM, Univ Montpellier, ENSCM, CNRS, Montpellier, France; Université de Nîmes, Nîmes, France
| | - Marie Morille
- ICGM, Univ Montpellier, ENSCM, CNRS, Montpellier, France.
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15
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Cabou C, Honorato P, Briceño L, Ghezali L, Duparc T, León M, Combes G, Frayssinhes L, Fournel A, Abot A, Masri B, Parada N, Aguilera V, Aguayo C, Knauf C, González M, Radojkovic C, Martinez LO. Pharmacological inhibition of the F 1 -ATPase/P2Y 1 pathway suppresses the effect of apolipoprotein A1 on endothelial nitric oxide synthesis and vasorelaxation. Acta Physiol (Oxf) 2019; 226:e13268. [PMID: 30821416 DOI: 10.1111/apha.13268] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 02/14/2019] [Accepted: 02/22/2019] [Indexed: 12/12/2022]
Abstract
AIM The contribution of apolipoprotein A1 (APOA1), the major apolipoprotein of high-density lipoprotein (HDL), to endothelium-dependent vasodilatation is unclear, and there is little information regarding endothelial receptors involved in this effect. Ecto-F1 -ATPase is a receptor for APOA1, and its activity in endothelial cells is coupled to adenosine diphosphate (ADP)-sensitive P2Y receptors (P2Y ADP receptors). Ecto-F1 -ATPase is involved in APOA1-mediated cell proliferation and HDL transcytosis. Here, we investigated the effect of lipid-free APOA1 and the involvement of ecto-F1 -ATPase and P2Y ADP receptors on nitric oxide (NO) synthesis and the regulation of vascular tone. METHOD Nitric oxide synthesis was assessed in human endothelial cells from umbilical veins (HUVECs) and isolated mouse aortas. Changes in vascular tone were evaluated by isometric force measurements in isolated human umbilical and placental veins and by assessing femoral artery blood flow in conscious mice. RESULTS Physiological concentrations of lipid-free APOA1 enhanced endothelial NO synthesis, which was abolished by inhibitors of endothelial nitric oxide synthase (eNOS) and of the ecto-F1 -ATPase/P2Y1 axis. Accordingly, APOA1 inhibited vasoconstriction induced by thromboxane A2 receptor agonist and increased femoral artery blood flow in mice. These effects were blunted by inhibitors of eNOS, ecto-F1 -ATPase and P2Y1 receptor. CONCLUSIONS Using a pharmacological approach, we thus found that APOA1 promotes endothelial NO production and thereby controls vascular tone in a process that requires activation of the ecto-F1 -ATPase/P2Y1 pathway by APOA1. Pharmacological targeting of this pathway with respect to vascular diseases should be explored.
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Affiliation(s)
- Cendrine Cabou
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
- Department of Human Physiology, Faculty of Pharmacy University Paul Sabatier Toulouse France
| | - Paula Honorato
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
| | - Luis Briceño
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
| | - Lamia Ghezali
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
| | - Thibaut Duparc
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
| | - Marcelo León
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
| | - Guillaume Combes
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
| | - Laure Frayssinhes
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
| | - Audren Fournel
- UMR 1220, IRSD, INSERM, INRA, ENVT, European Associated Laboratory NeuroMicrobiota (INSERM/UCL) University of Toulouse Toulouse France
| | - Anne Abot
- UMR 1220, IRSD, INSERM, INRA, ENVT, European Associated Laboratory NeuroMicrobiota (INSERM/UCL) University of Toulouse Toulouse France
| | - Bernard Masri
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
| | - Nicol Parada
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
| | - Valeria Aguilera
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
| | - Claudio Aguayo
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
- Group of Research and Innovation in Vascular Health (GRIVAS Health) Chillan Chile
| | - Claude Knauf
- UMR 1220, IRSD, INSERM, INRA, ENVT, European Associated Laboratory NeuroMicrobiota (INSERM/UCL) University of Toulouse Toulouse France
| | - Marcelo González
- Group of Research and Innovation in Vascular Health (GRIVAS Health) Chillan Chile
- Vascular Physiology Laboratory, Department of Physiology, Faculty of Biological Sciences, and Department of Obstetrics and Gynecology, Faculty of Medicine Universidad de Concepción Concepción Chile
| | - Claudia Radojkovic
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy Universidad de Concepción Concepción Chile
| | - Laurent O. Martinez
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases University of Toulouse, Paul Sabatier University Toulouse France
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16
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Study of in vitro interaction between Fusarium verticillioides and Streptomyces sp. using metabolomics. Folia Microbiol (Praha) 2019; 65:303-314. [PMID: 31250362 DOI: 10.1007/s12223-019-00725-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 06/10/2019] [Indexed: 10/26/2022]
Abstract
The Streptomyces sp. strain AV05 isolated from an organic amendment was found to impact both growth and fumonisin production of Fusarium verticillioides during in vitro direct confrontation. In order to investigate the interactions between the Streptomyces sp. strain AV05 and F. verticillioides, a metabolomic approach was used. The study of the endometabolomes of the microorganisms was carried out in two different conditions: the microorganisms were cultivated alone or in confrontation. The aim of this study was to examine the modifications of the endometabolome of F. verticillioides in confrontation with the Streptomyces strain. The metabolites involved in these modifications were identified using 2D NMR. Many metabolites were found to be overproduced in confrontation assays with the Streptomyces strain, notably 16 proteinogenic amino acids, inosine, and uridine. This suggested that fungal metabolic pathways such as protein synthesis have been affected due to interaction. Thus, metabolomic studies, as well as proteomics or transcriptomics, are useful for deciphering the mechanisms of interactions between biological control agents and mycotoxigenic fungi. This comprehension is one of the key elements of the improvement of the selection and use of antagonistic agents.
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17
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Guillaume M, Riant E, Fabre A, Raymond-Letron I, Buscato M, Davezac M, Tramunt B, Montagner A, Smati S, Zahreddine R, Palierne G, Valera MC, Guillou H, Lenfant F, Unsicker K, Metivier R, Fontaine C, Arnal JF, Gourdy P. Selective Liver Estrogen Receptor α Modulation Prevents Steatosis, Diabetes, and Obesity Through the Anorectic Growth Differentiation Factor 15 Hepatokine in Mice. Hepatol Commun 2019; 3:908-924. [PMID: 31304450 PMCID: PMC6601326 DOI: 10.1002/hep4.1363] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 03/28/2019] [Indexed: 12/17/2022] Open
Abstract
Hepatocyte estrogen receptor α (ERα) was recently recognized as a relevant molecular target for nonalcoholic fatty liver disease (NAFLD) prevention. The present study defined to what extent hepatocyte ERα could be involved in preserving metabolic homeostasis in response to a full (17β-estradiol [E2]) or selective (selective estrogen receptor modulator [SERM]) activation. Ovariectomized mice harboring a hepatocyte-specific ERα deletion (LERKO mice) and their wild-type (WT) littermates were fed a high-fat diet (HFD) and concomitantly treated with E2, tamoxifen (TAM; the most used SERM), or vehicle. As expected, both E2 and TAM prevented all HFD-induced metabolic disorders in WT mice, and their protective effects against steatosis were abolished in LERKO mice. However, while E2 still prevented obesity and glucose intolerance in LERKO mice, hepatocyte ERα deletion also abrogated TAM-mediated control of food intake as well as its beneficial actions on adiposity, insulin sensitivity, and glucose homeostasis, suggesting a whole-body protective role for liver-derived circulating factors. Moreover, unlike E2, TAM induced a rise in plasma concentration of the anorectic hepatokine growth differentiation factor 15 (Gdf15) through a transcriptional mechanism dependent on hepatocyte ERα activation. Accordingly, ERα was associated with specific binding sites in the Gdf15 regulatory region in hepatocytes from TAM-treated mice but not under E2 treatment due to specific epigenetic modifications. Finally, all the protective effects of TAM were abolished in HFD-fed GDF15-knockout mice. Conclusion: We identified the selective modulation of hepatocyte ERα as a pharmacologic strategy to induce sufficient anorectic hepatokine Gdf15 to prevent experimental obesity, type 2 diabetes, and NAFLD.
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Affiliation(s)
- Maeva Guillaume
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France.,Service d'Hépato-gastro-entérologie Centre Hospitalier Universitaire de Toulouse Toulouse France
| | - Elodie Riant
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Aurélie Fabre
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Isabelle Raymond-Letron
- STROMALab, Centre National de la Recherche Scientifique ERL5311 Etablissement Français du Sang, Ecole Nationale Vétérinaire de Toulouse, Institut National de la Santé et de le Recherche Médicale (INSERM) U1031, Université de Toulouse III Toulouse France
| | - Melissa Buscato
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Morgane Davezac
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Blandine Tramunt
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Alexandra Montagner
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Sarra Smati
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France.,Institut National de La Recherche Agronomique Unité Médicale de Recherche 1331, ToxAlim, Université de Toulouse Toulouse France
| | - Rana Zahreddine
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Gaëlle Palierne
- Equipe SP@RTE, Unité Médicale de Recherche 6290, Institut de Genétique et Développement de Rennes Université de Rennes 1 Rennes France
| | - Marie-Cécile Valera
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Hervé Guillou
- Institut National de La Recherche Agronomique Unité Médicale de Recherche 1331, ToxAlim, Université de Toulouse Toulouse France
| | - Françoise Lenfant
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Klaus Unsicker
- Institute of Anatomy and Cell Biology, Department of Molecular Embryology University of Freiburg Freiburg Germany
| | - Raphaël Metivier
- Equipe SP@RTE, Unité Médicale de Recherche 6290, Institut de Genétique et Développement de Rennes Université de Rennes 1 Rennes France
| | - Coralie Fontaine
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Jean-François Arnal
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France
| | - Pierre Gourdy
- Institut des Maladies Métaboliques et Cardiovasculaires Unité Médicale de Recherche 1048, Institut National de la Santé et de le Recherche Médicale (INSERM), Université de Toulouse III Toulouse France.,Service de Diabétologie Maladies Métaboliques et Nutrition, Centre Hospitalier Universitaire de Toulouse Toulouse France
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18
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Giroud S, Chery I, Bertile F, Bertrand-Michel J, Tascher G, Gauquelin-Koch G, Arnemo JM, Swenson JE, Singh NJ, Lefai E, Evans AL, Simon C, Blanc S. Lipidomics Reveals Seasonal Shifts in a Large-Bodied Hibernator, the Brown Bear. Front Physiol 2019; 10:389. [PMID: 31031634 PMCID: PMC6474398 DOI: 10.3389/fphys.2019.00389] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/21/2019] [Indexed: 01/10/2023] Open
Abstract
Prior to winter, heterotherms retain polyunsaturated fatty acids (“PUFA”), resulting in enhanced energy savings during hibernation, through deeper and longer torpor bouts. Hibernating bears exhibit a less dramatic reduction (2–5°C) in body temperature, but lower their metabolism to a degree close to that of small hibernators. We determined the lipid composition, via lipidomics, in skeletal muscle and white adipose tissues (“WAT”), to assess lipid retention, and in blood plasma, to reflect lipid trafficking, of winter hibernating and summer active wild Scandinavian brown bears (Ursus arctos). We found that the proportion of monounsaturated fatty acids in muscle of bears was significantly higher during winter. During hibernation, omega-3 PUFAs were retained in WAT and short-length fatty acids were released into the plasma. The analysis of individual lipid moieties indicated significant changes of specific fatty acids, which are in line with the observed seasonal shift in the major lipid categories and can be involved in specific regulations of metabolisms. These results strongly suggest that the shift in lipid composition is well conserved among hibernators, independent of body mass and of the animals’ body temperature.
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Affiliation(s)
- Sylvain Giroud
- Research Institute of Wildlife Ecology, Department of Integrative Biology and Evolution, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Isabelle Chery
- IPHC, University of Strasbourg, Strasbourg, France.,UMR7178, CNRS, Strasbourg, France
| | - Fabrice Bertile
- IPHC, University of Strasbourg, Strasbourg, France.,UMR7178, CNRS, Strasbourg, France
| | | | - Georg Tascher
- IPHC, University of Strasbourg, Strasbourg, France.,UMR7178, CNRS, Strasbourg, France
| | | | - Jon M Arnemo
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Koppang, Norway.,Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Jon E Swenson
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway.,Norwegian Institute for Nature Research, Trondheim, Norway
| | - Navinder J Singh
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Etienne Lefai
- CARMEN, INSERM U1060, University of Lyon, INRA U1235, Oullins, France
| | - Alina L Evans
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Koppang, Norway
| | - Chantal Simon
- CARMEN, INSERM U1060, University of Lyon, INRA U1235, Oullins, France
| | - Stéphane Blanc
- IPHC, University of Strasbourg, Strasbourg, France.,UMR7178, CNRS, Strasbourg, France
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19
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Coady BM, Marshall JD, Hattie LE, Brannan AM, Fitzpatrick MN, Hickey KE, Wallin S, Booth V, Brown RJ. Characterization of a peptide containing the major heparin binding domain of human hepatic lipase. J Pept Sci 2018; 24:e3123. [DOI: 10.1002/psc.3123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/09/2018] [Accepted: 08/31/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Breanne M. Coady
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
| | - Jenika D. Marshall
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
| | - Luke E. Hattie
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
| | - Alexander M. Brannan
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
| | | | - Kala E. Hickey
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
| | - Stefan Wallin
- Department of Physics and Physical Oceanography; Memorial University of Newfoundland; St. John's NL Canada
| | - Valerie Booth
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
- Department of Physics and Physical Oceanography; Memorial University of Newfoundland; St. John's NL Canada
| | - Robert J. Brown
- Department of Biochemistry; Memorial University of Newfoundland; St. John's NL Canada
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20
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Martinez LO, Genoux A, Ferrières J, Duparc T, Perret B. Serum inhibitory factor 1, high-density lipoprotein and cardiovascular diseases. Curr Opin Lipidol 2017; 28:337-346. [PMID: 28504983 DOI: 10.1097/mol.0000000000000434] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW The atheroprotective properties of HDL are supported by epidemiological and preclinical research. However, the results of interventional trials paradoxically indicate that drugs increasing HDL-cholesterol (HDL-C) do not reduce coronary artery disease (CAD) risk. Moreover, Mendelian randomization studies have shown no effect of HDL-C-modifying variants on CAD outcome. Thus, the protective effects of HDL particles are more governed by their functional status than their cholesterol content. In this context, any successful clinical exploitation of HDL will depend on the identification of HDL-related biomarkers, better than HDL-C level, for assessing cardiovascular risk and monitoring responses to treatment. RECENT FINDINGS Recent studies have enlightened the role of ecto-F1-ATPase as a cell surface receptor for apoA-I, the major apolipoprotein of HDL, involved in the important metabolic and vascular atheroprotective functions of HDL. In the light of these findings, the clinical relevance of ecto-F1-ATPase in humans has recently been supported by the identification of serum F1-ATPase inhibitor (IF1) as an independent determinant of HDL-C, CAD risk and cardiovascular mortality in CAD patients. SUMMARY Serum IF1 measurement might be used as a novel HDL-related biomarker to better stratify risk in high-risk populations or to determine pharmacotherapy.
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Affiliation(s)
- Laurent O Martinez
- aInstitut National de la Santé et de la Recherche Médicale (INSERM), UMR 1048, Institute of Metabolic and Cardiovascular Diseases bUniversity of Toulouse, UMR1048, Paul Sabatier University cService de Biochimie, Pôle biologie, Hôpital de Purpan, CHU de Toulouse dDepartment of Cardiology, Toulouse Rangueil University Hospital eINSERM UMR 1027, Department of Epidemiology, Toulouse University School of Medicine, Toulouse, France
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21
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Guillaume M, Handgraaf S, Fabre A, Raymond-Letron I, Riant E, Montagner A, Vinel A, Buscato M, Smirnova N, Fontaine C, Guillou H, Arnal JF, Gourdy P. Selective Activation of Estrogen Receptor α Activation Function-1 Is Sufficient to Prevent Obesity, Steatosis, and Insulin Resistance in Mouse. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:1273-1287. [DOI: 10.1016/j.ajpath.2017.02.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 02/23/2017] [Indexed: 12/17/2022]
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22
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Martin P, Palhière I, Maroteau C, Bardou P, Canale-Tabet K, Sarry J, Woloszyn F, Bertrand-Michel J, Racke I, Besir H, Rupp R, Tosser-Klopp G. A genome scan for milk production traits in dairy goats reveals two new mutations in Dgat1 reducing milk fat content. Sci Rep 2017; 7:1872. [PMID: 28500343 PMCID: PMC5431851 DOI: 10.1038/s41598-017-02052-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 04/05/2017] [Indexed: 11/21/2022] Open
Abstract
The quantity of milk and milk fat and proteins are particularly important traits in dairy livestock. However, little is known about the regions of the genome that influence these traits in goats. We conducted a genome wide association study in French goats and identified 109 regions associated with dairy traits. For a major region on chromosome 14 closely associated with fat content, the Diacylglycerol O-Acyltransferase 1 (DGAT1) gene turned out to be a functional and positional candidate gene. The caprine reference sequence of this gene was completed and 29 polymorphisms were found in the gene sequence, including two novel exonic mutations: R251L and R396W, leading to substitutions in the protein sequence. The R251L mutation was found in the Saanen breed at a frequency of 3.5% and the R396W mutation both in the Saanen and Alpine breeds at a frequencies of 13% and 7% respectively. The R396W mutation explained 46% of the genetic variance of the trait, and the R251L mutation 6%. Both mutations were associated with a notable decrease in milk fat content. Their causality was then demonstrated by a functional test. These results provide new knowledge on the genetic basis of milk synthesis and will help improve the management of the French dairy goat breeding program.
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Affiliation(s)
- Pauline Martin
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
| | - Isabelle Palhière
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
| | - Cyrielle Maroteau
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
- Division of Molecular and Clinical Medecine, School of Medecine, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
| | - Philippe Bardou
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
- INRA, Sigenae, Castanet-Tolosan, France
| | - Kamila Canale-Tabet
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
| | - Julien Sarry
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
| | - Florent Woloszyn
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
| | | | - Ines Racke
- Protein Expression and Purification Core Facility, EMBL Heidelberg, Heidelberg, Germany
| | - Hüseyin Besir
- Protein Expression and Purification Core Facility, EMBL Heidelberg, Heidelberg, Germany
| | - Rachel Rupp
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
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23
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Chiappini F, Coilly A, Kadar H, Gual P, Tran A, Desterke C, Samuel D, Duclos-Vallée JC, Touboul D, Bertrand-Michel J, Brunelle A, Guettier C, Le Naour F. Metabolism dysregulation induces a specific lipid signature of nonalcoholic steatohepatitis in patients. Sci Rep 2017; 7:46658. [PMID: 28436449 PMCID: PMC5402394 DOI: 10.1038/srep46658] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 03/28/2017] [Indexed: 02/07/2023] Open
Abstract
Nonalcoholic steatohepatitis (NASH) is a condition which can progress to cirrhosis and hepatocellular carcinoma. Markers for NASH diagnosis are still lacking. We performed a comprehensive lipidomic analysis on human liver biopsies including normal liver, nonalcoholic fatty liver and NASH. Random forests-based machine learning approach allowed characterizing a signature of 32 lipids discriminating NASH with 100% sensitivity and specificity. Furthermore, we validated this signature in an independent group of NASH patients. Then, metabolism dysregulations were investigated in both patients and murine models. Alterations of elongase and desaturase activities were observed along the fatty acid synthesis pathway. The decreased activity of the desaturase FADS1 appeared as a bottleneck, leading upstream to an accumulation of fatty acids and downstream to a deficiency of long-chain fatty acids resulting to impaired phospholipid synthesis. In NASH, mass spectrometry imaging on tissue section revealed the spreading into the hepatic parenchyma of selectively accumulated fatty acids. Such lipids constituted a highly toxic mixture to human hepatocytes. In conclusion, this study characterized a specific and sensitive lipid signature of NASH and positioned FADS1 as a significant player in accumulating toxic lipids during NASH progression.
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Affiliation(s)
- Franck Chiappini
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, UMR-S1193, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France
| | - Audrey Coilly
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, UMR-S1193, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,AP-HP, Hôpital Paul-Brousse, Centre Hépato-Biliaire, Villejuif, F-94800, France
| | - Hanane Kadar
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, F-91198 Gif-Sur-Yvette, France
| | - Philippe Gual
- Inserm, Unité 1065, Nice, F-06204, France.,University of Nice-Sophia-Antipolis, Nice, F-06204, France.,Centre Hospitalier Universitaire de Nice, Hôpital L'Archet, Nice Cedex 3, F-06202, France
| | - Albert Tran
- Inserm, Unité 1065, Nice, F-06204, France.,University of Nice-Sophia-Antipolis, Nice, F-06204, France.,Centre Hospitalier Universitaire de Nice, Hôpital L'Archet, Nice Cedex 3, F-06202, France
| | - Christophe Desterke
- Inserm, US33, Villejuif, F-94800, France.,Univ Paris-Sud, US33, Villejuif, F-94800, France
| | - Didier Samuel
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, UMR-S1193, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,AP-HP, Hôpital Paul-Brousse, Centre Hépato-Biliaire, Villejuif, F-94800, France
| | - Jean-Charles Duclos-Vallée
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, UMR-S1193, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,AP-HP, Hôpital Paul-Brousse, Centre Hépato-Biliaire, Villejuif, F-94800, France
| | - David Touboul
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, F-91198 Gif-Sur-Yvette, France
| | | | - Alain Brunelle
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, F-91198 Gif-Sur-Yvette, France
| | - Catherine Guettier
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, UMR-S1193, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,AP-HP, Hôpital du Kremlin-Bicêtre, Service d'Anatomopathologie, Le Kremlin-Bicêtre, F-94275, France
| | - François Le Naour
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, UMR-S1193, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,Inserm, US33, Villejuif, F-94800, France.,Univ Paris-Sud, US33, Villejuif, F-94800, France
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24
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Jayaraman S, Sánchez-Quesada JL, Gursky O. Triglyceride increase in the core of high-density lipoproteins augments apolipoprotein dissociation from the surface: Potential implications for treatment of apolipoprotein deposition diseases. Biochim Biophys Acta Mol Basis Dis 2016; 1863:200-210. [PMID: 27768903 DOI: 10.1016/j.bbadis.2016.10.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 10/13/2016] [Accepted: 10/16/2016] [Indexed: 12/12/2022]
Abstract
Lipids in the body are transported via lipoproteins that are nanoparticles comprised of lipids and amphipathic proteins termed apolipoproteins. This family of lipid surface-binding proteins is over-represented in human amyloid diseases. In particular, all major proteins of high-density lipoproteins (HDL), including apoA-I, apoA-II and serum amyloid A, can cause systemic amyloidoses in humans upon protein mutations, post-translational modifications or overproduction. Here, we begin to explore how the HDL lipid composition influences amyloid deposition by apoA-I and related proteins. First, we summarize the evidence that, in contrast to lipoproteins that are stabilized by kinetic barriers, free apolipoproteins are labile to misfolding and proteolysis. Next, we report original biochemical and biophysical studies showing that increase in triglyceride content in the core of plasma or reconstituted HDL destabilizes the lipoprotein assembly, making it more labile to various perturbations (oxidation, thermal and chemical denaturation and enzymatic hydrolysis), and promotes apoA-I release in a lipid-poor/free aggregation-prone form. Together, the results suggest that decreasing plasma levels of triglycerides will shift the dynamic equilibrium from the lipid-poor/free (labile) to the HDL-bound (protected) apolipoprotein state, thereby decreasing the generation of the protein precursor of amyloid. This prompts us to propose that triglyceride-lowering therapies may provide a promising strategy to alleviate amyloid diseases caused by the deposition of HDL proteins.
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Affiliation(s)
- Shobini Jayaraman
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, USA
| | - Jose Luis Sánchez-Quesada
- Cardiovascular Biochemistry Group, Biomedical Research Institute IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Olga Gursky
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, USA.
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25
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Chiappini F, Desterke C, Bertrand-Michel J, Guettier C, Le Naour F. Hepatic and serum lipid signatures specific to nonalcoholic steatohepatitis in murine models. Sci Rep 2016; 6:31587. [PMID: 27510159 PMCID: PMC4980672 DOI: 10.1038/srep31587] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 07/19/2016] [Indexed: 01/01/2023] Open
Abstract
Nonalcoholic fatty liver (NAFL) is a precursor of nonalcoholic steatohepatitis (NASH), a condition that may progress to cirrhosis and hepatocellular carcinoma. Markers for diagnosis of NASH are still lacking. We have investigated lipid markers using mouse models that developed NAFL when fed with high fat diet (HFD) or NASH when fed using methionine choline deficient diet (MCDD). We have performed a comprehensive lipidomic analysis on liver tissues as well as on sera from mice fed HFD (n = 5), MCDD (n = 5) or normal diet as controls (n = 10). Machine learning approach based on prediction analysis of microarrays followed by random forests allowed identifying 21 lipids out of 149 in the liver and 14 lipids out of 155 in the serum discriminating mice fed MCDD from HFD or controls. In conclusion, the global approach implemented allowed characterizing lipid signatures specific to NASH in both liver and serum from animal models. This opens new avenue for investigating early and non-invasive lipid markers for diagnosis of NASH in human.
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Affiliation(s)
- Franck Chiappini
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, Institut André Lwoff, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France
| | - Christophe Desterke
- Univ Paris-Sud, Institut André Lwoff, Villejuif, F-94800, France.,Inserm, US33, Villejuif, F-94800, France
| | | | - Catherine Guettier
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, Institut André Lwoff, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,AP-HP Hôpital du Kremlin-Bicêtre, Service d'Anatomopathologie, Le Kremlin, F-94275, France
| | - François Le Naour
- Inserm, Unité 1193, Villejuif, F-94800, France.,Univ Paris-Sud, Institut André Lwoff, Villejuif, F-94800, France.,DHU Hepatinov, Villejuif, F-94800, France.,Inserm, US33, Villejuif, F-94800, France
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26
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Soayfane Z, Tercé F, Cantiello M, Robenek H, Nauze M, Bézirard V, Allart S, Payré B, Capilla F, Cartier C, Peres C, Al Saati T, Théodorou V, Nelson DW, Yen CLE, Collet X, Coméra C. Exposure to dietary lipid leads to rapid production of cytosolic lipid droplets near the brush border membrane. Nutr Metab (Lond) 2016; 13:48. [PMID: 27478484 PMCID: PMC4965885 DOI: 10.1186/s12986-016-0107-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 07/21/2016] [Indexed: 12/17/2022] Open
Abstract
Background Intestinal absorption of dietary lipids involves their hydrolysis in the lumen of proximal intestine as well as uptake, intracellular transport and re-assembly of hydrolyzed lipids in enterocytes, leading to the formation and secretion of the lipoproteins chylomicrons and HDL. In this study, we examined the potential involvement of cytosolic lipid droplets (CLD) whose function in the process of lipid absorption is poorly understood. Methods Intestinal lipid absorption was studied in mouse after gavage. Three populations of CLD were purified by density ultracentrifugations, as well as the brush border membranes, which were analyzed by western-blots. Immunofluorescent localization of membranes transporters or metabolic enzymes, as well as kinetics of CLD production, were also studied in intestine or Caco-2 cells. Results We isolated three populations of CLD (ranging from 15 to 1000 nm) which showed differential expression of the major lipid transporters scavenger receptor BI (SR-BI), cluster of differentiation 36 (CD-36), Niemann Pick C-like 1 (NPC1L1), and the ATP-binding cassette transporters ABCG5/G8 but also caveolin 2 and fatty acid binding proteins. The enzyme monoacylglycerol acyltransferase 2 (MGAT2) was identified in the brush border membrane (BBM) in addition to the endoplasmic reticulum, suggesting local synthesis of triglycerides and CLD at both places. Conclusions We show a very fast production of CLD by enterocytes associated with a transfer of apical constituents as lipid transporters. Our findings suggest that following their uptake by enterocytes, lipids can be partially metabolized at the BBM and packaged into CLD for their transportation to the ER. Electronic supplementary material The online version of this article (doi:10.1186/s12986-016-0107-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zeina Soayfane
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France
| | - François Tercé
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France
| | - Michela Cantiello
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France
| | - Horst Robenek
- Leibniz-Institut für Arterioskleroseforschung, Universität Münster, Münster, Germany
| | - Michel Nauze
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France
| | - Valérie Bézirard
- UMR 1331 Toxalim, INRA, Université de Toulouse, ENVT, INP-Purpan, 180 chemin de Tournefeuille, BP 93173, 31027 Toulouse, cedex 3, France
| | - Sophie Allart
- INSERM UMR 1043 (INSERM/UPS/CNRS/USC Inra), CHU Purpan, Toulouse, France
| | - Bruno Payré
- CMEAB, Faculté de Médecine Rangueil, Toulouse, France
| | - Florence Capilla
- INSERM/UPS - US006/CREFRE, Service d'Histopathologie, CHU Purpan, Toulouse, France
| | - Christel Cartier
- UMR 1331 Toxalim, INRA, Université de Toulouse, ENVT, INP-Purpan, 180 chemin de Tournefeuille, BP 93173, 31027 Toulouse, cedex 3, France
| | - Christine Peres
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France
| | - Talal Al Saati
- INSERM/UPS - US006/CREFRE, Service d'Histopathologie, CHU Purpan, Toulouse, France
| | - Vassilia Théodorou
- UMR 1331 Toxalim, INRA, Université de Toulouse, ENVT, INP-Purpan, 180 chemin de Tournefeuille, BP 93173, 31027 Toulouse, cedex 3, France
| | - David W Nelson
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI USA
| | - Chi-Liang Eric Yen
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI USA
| | - Xavier Collet
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France
| | - Christine Coméra
- Institut des Maladies Métaboliques et Cardiovasculaires - I2MC, UMR 1048, Institut National de la Santé et de la Recherche Médicale, Université Toulouse III Paul Sabatier, Toulouse, F-31000 France.,UMR 1331 Toxalim, INRA, Université de Toulouse, ENVT, INP-Purpan, 180 chemin de Tournefeuille, BP 93173, 31027 Toulouse, cedex 3, France
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27
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Akil A, Peng J, Omrane M, Gondeau C, Desterke C, Marin M, Tronchère H, Taveneau C, Sar S, Briolotti P, Benjelloun S, Benjouad A, Maurel P, Thiers V, Bressanelli S, Samuel D, Bréchot C, Gassama-Diagne A. Septin 9 induces lipid droplets growth by a phosphatidylinositol-5-phosphate and microtubule-dependent mechanism hijacked by HCV. Nat Commun 2016; 7:12203. [PMID: 27417143 PMCID: PMC4947189 DOI: 10.1038/ncomms12203] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 06/07/2016] [Indexed: 01/09/2023] Open
Abstract
The accumulation of lipid droplets (LD) is frequently observed in hepatitis C virus (HCV) infection and represents an important risk factor for the development of liver steatosis and cirrhosis. The mechanisms of LD biogenesis and growth remain open questions. Here, transcriptome analysis reveals a significant upregulation of septin 9 in HCV-induced cirrhosis compared with the normal liver. HCV infection increases septin 9 expression and induces its assembly into filaments. Septin 9 regulates LD growth and perinuclear accumulation in a manner dependent on dynamic microtubules. The effects of septin 9 on LDs are also dependent on binding to PtdIns5P, which, in turn, controls the formation of septin 9 filaments and its interaction with microtubules. This previously undescribed cooperation between PtdIns5P and septin 9 regulates oleate-induced accumulation of LDs. Overall, our data offer a novel route for LD growth through the involvement of a septin 9/PtdIns5P signalling pathway.
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Affiliation(s)
- Abdellah Akil
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France.,Laboratoire des Hépatites Virales, Département de Virologie. Institut Pasteur du Maroc, BP 20360 Casablanca, Maroc.,Faculté des Sciences, Laboratoire de Biochimie-Immunologie, Univ. Mohammed V, Rabat, Maroc
| | - Juan Peng
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France.,DHU Hepatinov, Villejuif F-94800, France
| | - Mohyeddine Omrane
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France.,DHU Hepatinov, Villejuif F-94800, France
| | - Claire Gondeau
- INSERM U1183, Institute of Regenerative Medicine and Biotherapy, University of Montpellier, 34295 Montpellier, France.,Department of Hepato-Gastroenterology A, Hospital Saint Eloi, CHRU, 34295 Montpellier, France
| | | | - Mickaël Marin
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France
| | - Hélène Tronchère
- INSERM U1048, I2MC and Université Paul Sabatier, 31432 Toulouse, France
| | - Cyntia Taveneau
- Virologie Moléculaire et Structurale CNRS UPR 3296 - INRA UsC 1358, 91198 Gif-sur-Yvette, France
| | - Sokhavuth Sar
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France
| | - Philippe Briolotti
- INSERM U1183, Institute of Regenerative Medicine and Biotherapy, University of Montpellier, 34295 Montpellier, France.,Department of Hepato-Gastroenterology A, Hospital Saint Eloi, CHRU, 34295 Montpellier, France
| | - Soumaya Benjelloun
- Laboratoire des Hépatites Virales, Département de Virologie. Institut Pasteur du Maroc, BP 20360 Casablanca, Maroc
| | - Abdelaziz Benjouad
- Faculté des Sciences, Laboratoire de Biochimie-Immunologie, Univ. Mohammed V, Rabat, Maroc.,Univ. Internationale de Rabat, Sala Al Jadida, Maroc
| | - Patrick Maurel
- INSERM U1183, Institute of Regenerative Medicine and Biotherapy, University of Montpellier, 34295 Montpellier, France.,Department of Hepato-Gastroenterology A, Hospital Saint Eloi, CHRU, 34295 Montpellier, France
| | | | - Stéphane Bressanelli
- Virologie Moléculaire et Structurale CNRS UPR 3296 - INRA UsC 1358, 91198 Gif-sur-Yvette, France
| | - Didier Samuel
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France.,DHU Hepatinov, Villejuif F-94800, France.,AP-HP Hôpital Paul-Brousse, Centre Hépato-Biliaire, Villejuif F-94800, France
| | - Christian Bréchot
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France.,Institut Pasteur, 75724 Paris, France
| | - Ama Gassama-Diagne
- INSERM, Unité 1193, F-94800 Villejuif, France.,University of Paris-Sud, UMR-S 1193, F-94800 Villejuif, France.,DHU Hepatinov, Villejuif F-94800, France
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Papageorgiou N, Zacharia E, Androulakis E, Briasoulis A, Charakida M, Tousoulis D. HDL as a prognostic biomarker for coronary atherosclerosis: the role of inflammation. Expert Opin Ther Targets 2016; 20:907-21. [PMID: 26854521 DOI: 10.1517/14728222.2016.1152264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
INTRODUCTION Emerging evidence suggests that the role of high density lipoprotein (HDL) in the atherosclerotic process is not as clear as previously thought, since atheroprotective HDL becomes atherogenic in states of increased inflammatory processes. AREAS COVERED In this review we aim to elucidate the role of HDL as a prognostic biomarker and we discuss therapeutic approaches that aim to increase HDL and their possible clinical benefit. EXPERT OPINION Given the structural variability and biological complexity of the HDL particle, its role in the atherosclerotic process is far from clear. According to current evidence, the atheroprotective role of HDL turns atherogenic in states of increased inflammatory processes, while even minor alterations in systemic inflammation are likely to hinder the endothelial protective effects of HDL. In accordance, significant data have revealed that HDL-related drugs may be effective in reducing cardiovascular mortality; however they are not as encouraging or unanimous as expected. Possible future goals could be to quantify either HDL subclasses or functions in an attempt to reach safer conclusions as to the prognostic importance of HDL in coronary atherosclerosis. Having achieved that, a more targeted therapy that would aim to raise either HDL functionality or to remodel HDL structure would be more easily designed.
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Affiliation(s)
| | - Effimia Zacharia
- b 1st Department of Cardiology , Hippokration Hospital, University of Athens , Athens , Greece
| | | | - Alexandros Briasoulis
- d Division of Cardiology , Wayne State University/Detroit Medical Center , Detroit , MI , USA
| | - Marietta Charakida
- e Vascular Physiology Unit, Institute of Cardiovascular Science , University College London , London , UK
| | - Dimitris Tousoulis
- b 1st Department of Cardiology , Hippokration Hospital, University of Athens , Athens , Greece
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29
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Jia LQ, Zhang N, Xu Y, Chen WN, Zhu ML, Song N, Ren L, Cao HM, Wang JY, Yang GL. Tanshinone IIA affects the HDL subfractions distribution not serum lipid levels: Involving in intake and efflux of cholesterol. Arch Biochem Biophys 2016; 592:50-9. [DOI: 10.1016/j.abb.2016.01.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 12/30/2015] [Accepted: 01/01/2016] [Indexed: 11/28/2022]
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30
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Peng C, Chiappini F, Kaščáková S, Danulot M, Sandt C, Samuel D, Dumas P, Guettier C, Le Naour F. Vibrational signatures to discriminate liver steatosis grades. Analyst 2015; 140:1107-18. [PMID: 25581590 DOI: 10.1039/c4an01679c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a frequent lesion associated with obesity, diabetes and the metabolic syndrome. The hallmark feature of fatty liver disease is steatosis, which is the intra-cellular accumulation of lipids resulting in the formation of vesicles in hepatocytes. Steatosis is a precursor of steatohepatitis, a condition that may progress to hepatic fibrosis, cirrhosis and primary liver cancer. We addressed the potential of Fourier transform-infrared (FTIR) microspectroscopy for grading steatosis on frozen tissue sections. The use of the bright infrared source emitted by synchrotron radiation (SR) allowed the investigation of the biochemical composition at the cellular level. The variance in the huge number of spectra acquired was addressed by principal component analysis (PCA). The study demonstrated that the progression of steatosis corresponds not only to the accumulation of lipids but also to dramatic changes in the qualitative composition of the tissue. Indeed, a lower grade of steatosis showed a decrease in glycogen content and a concomitant increase in lipids in comparison with normal liver. Intermediate steatosis exhibited an increase in glycogen and major changes in lipids, with a significant contribution of esterified fatty acids with elongated carbon chains and unsaturated lipids, and these features were more pronounced in a high grade of steatosis. Furthermore, the approach allows a systematic discrimination of morphological features, leading to a separate investigation of steatotic vesicles and the non-steatotic counterpart of the tissue. This highlighted the fact that dramatic biochemical changes occur in the non-steatotic part of the tissue also despite its normal histological aspect, suggesting that the whole tissue reflects the grade of steatosis.
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31
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Hafiane A, Genest J. High density lipoproteins: Measurement techniques and potential biomarkers of cardiovascular risk. BBA CLINICAL 2015; 3:175-88. [PMID: 26674734 PMCID: PMC4661556 DOI: 10.1016/j.bbacli.2015.01.005] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 01/16/2015] [Accepted: 01/26/2015] [Indexed: 12/31/2022]
Abstract
Plasma high density lipoprotein cholesterol (HDL) comprises a heterogeneous family of lipoprotein species, differing in surface charge, size and lipid and protein compositions. While HDL cholesterol (C) mass is a strong, graded and coherent biomarker of cardiovascular risk, genetic and clinical trial data suggest that the simple measurement of HDL-C may not be causal in preventing atherosclerosis nor reflect HDL functionality. Indeed, the measurement of HDL-C may be a biomarker of cardiovascular health. To assess the issue of HDL function as a potential therapeutic target, robust and simple analytical methods are required. The complex pleiotropic effects of HDL make the development of a single measurement challenging. Development of laboratory assays that accurately HDL function must be developed validated and brought to high-throughput for clinical purposes. This review discusses the limitations of current laboratory technologies for methods that separate and quantify HDL and potential application to predict CVD, with an emphasis on emergent approaches as potential biomarkers in clinical practice.
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Key Words
- 2D-PAGGE, two dimensional polyacrylamide gradient gel electrophoresis
- ApoA-I, apolipoprotein A-I
- Apolipoprotein A-I
- Atherosclerosis
- Biomarkers of cardiovascular risk
- CHD, coronary heart disease
- CVD, cardiovascular disease
- Cellular cholesterol efflux
- Coronary artery disease
- HDL, high density lipoprotein
- HPLC, High Performance Liquid Chromatography
- High density lipoproteins
- LCAT, lecithin–cholesterol acyltransferase
- LDL, low density lipoprotein
- MALDI, matrix-assisted laser desorption/ionization
- MOP, myeloperoxidase
- MS/MS, tandem-mass spectrometry
- ND-PAGGE, non-denaturant polyacrylamide gradient gel electrophoresis
- NMR, nuclear magnetic resonance
- PEG, polyethylene glycol
- PON1, paraoxonase 1
- SELDI, surface enhanced laser desorption/ionization
- TOF, time-of-flight
- UTC, ultracentrifugation
- Vascular endothelial function
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Affiliation(s)
- Anouar Hafiane
- McGill University Health Center, Royal Victoria Hospital, 687 Avenue des Pins West, Montreal, QC H3A 1A1, Canada
| | - Jacques Genest
- McGill University Health Center, Royal Victoria Hospital, 687 Avenue des Pins West, Montreal, QC H3A 1A1, Canada
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32
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Zannis VI, Fotakis P, Koukos G, Kardassis D, Ehnholm C, Jauhiainen M, Chroni A. HDL biogenesis, remodeling, and catabolism. Handb Exp Pharmacol 2015; 224:53-111. [PMID: 25522986 DOI: 10.1007/978-3-319-09665-0_2] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this chapter, we review how HDL is generated, remodeled, and catabolized in plasma. We describe key features of the proteins that participate in these processes, emphasizing how mutations in apolipoprotein A-I (apoA-I) and the other proteins affect HDL metabolism. The biogenesis of HDL initially requires functional interaction of apoA-I with the ATP-binding cassette transporter A1 (ABCA1) and subsequently interactions of the lipidated apoA-I forms with lecithin/cholesterol acyltransferase (LCAT). Mutations in these proteins either prevent or impair the formation and possibly the functionality of HDL. Remodeling and catabolism of HDL is the result of interactions of HDL with cell receptors and other membrane and plasma proteins including hepatic lipase (HL), endothelial lipase (EL), phospholipid transfer protein (PLTP), cholesteryl ester transfer protein (CETP), apolipoprotein M (apoM), scavenger receptor class B type I (SR-BI), ATP-binding cassette transporter G1 (ABCG1), the F1 subunit of ATPase (Ecto F1-ATPase), and the cubulin/megalin receptor. Similarly to apoA-I, apolipoprotein E and apolipoprotein A-IV were shown to form discrete HDL particles containing these apolipoproteins which may have important but still unexplored functions. Furthermore, several plasma proteins were found associated with HDL and may modulate its biological functions. The effect of these proteins on the functionality of HDL is the topic of ongoing research.
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Affiliation(s)
- Vassilis I Zannis
- Molecular Genetics, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, 02118, USA,
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Shimizu T, Miura SI, Tanigawa H, Kuwano T, Zhang B, Uehara Y, Saku K. Rosuvastatin Activates ATP-Binding Cassette Transporter A1–Dependent Efflux Ex Vivo and Promotes Reverse Cholesterol Transport in Macrophage Cells in Mice Fed a High-Fat Diet. Arterioscler Thromb Vasc Biol 2014; 34:2246-53. [DOI: 10.1161/atvbaha.114.303715] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Tomohiko Shimizu
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
| | - Shin-ichiro Miura
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
| | - Hiroyuki Tanigawa
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
| | - Takashi Kuwano
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
| | - Bo Zhang
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
| | - Yoshinari Uehara
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
| | - Keijiro Saku
- From the Departments of Cardiology (T.S., S.M., H.T., T.K., Y.U., K.S.), Molecular Cardiovascular Therapeutics (S.M., Y.U., K.S.), Biochemistry (B.Z.), and Advanced Therapeutics for Cardiovascular Disease (H.T., K.S.), Fukuoka University School of Medicine, Fukuoka, Japan
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Labialle S, Marty V, Bortolin-Cavaillé ML, Hoareau-Osman M, Pradère JP, Valet P, Martin PGP, Cavaillé J. The miR-379/miR-410 cluster at the imprinted Dlk1-Dio3 domain controls neonatal metabolic adaptation. EMBO J 2014; 33:2216-30. [PMID: 25124681 DOI: 10.15252/embj.201387038] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
In mammals, birth entails complex metabolic adjustments essential for neonatal survival. Using a mouse knockout model, we identify crucial biological roles for the miR-379/miR-410 cluster within the imprinted Dlk1-Dio3 region during this metabolic transition. The miR-379/miR-410 locus, also named C14MC in humans, is the largest known placental mammal-specific miRNA cluster, whose 39 miRNA genes are expressed only from the maternal allele. We found that heterozygote pups with a maternal--but not paternal--deletion of the miRNA cluster display partially penetrant neonatal lethality with defects in the maintenance of energy homeostasis. This maladaptive metabolic response is caused, at least in part, by profound changes in the activation of the neonatal hepatic gene expression program, pointing to as yet unidentified regulatory pathways that govern this crucial metabolic transition in the newborn's liver. Not only does our study highlight the physiological importance of miRNA genes that recently evolved in placental mammal lineages but it also unveils additional layers of RNA-mediated gene regulation at the Dlk1-Dio3 domain that impose parent-of-origin effects on metabolic control at birth and have likely contributed to mammal evolution.
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Affiliation(s)
- Stéphane Labialle
- Laboratoire de Biologie Moléculaire Eucaryote, UPS Université de Toulouse, Toulouse, France CNRS LBME, UMR5099, Toulouse, France
| | - Virginie Marty
- Laboratoire de Biologie Moléculaire Eucaryote, UPS Université de Toulouse, Toulouse, France CNRS LBME, UMR5099, Toulouse, France
| | - Marie-Line Bortolin-Cavaillé
- Laboratoire de Biologie Moléculaire Eucaryote, UPS Université de Toulouse, Toulouse, France CNRS LBME, UMR5099, Toulouse, France
| | - Magali Hoareau-Osman
- Laboratoire de Biologie Moléculaire Eucaryote, UPS Université de Toulouse, Toulouse, France CNRS LBME, UMR5099, Toulouse, France
| | - Jean-Philippe Pradère
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Toulouse, France Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université de Toulouse Université Paul Sabatier, Toulouse, France
| | - Philippe Valet
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Toulouse, France Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université de Toulouse Université Paul Sabatier, Toulouse, France
| | - Pascal G P Martin
- Laboratoire de Biologie Moléculaire Eucaryote, UPS Université de Toulouse, Toulouse, France CNRS LBME, UMR5099, Toulouse, France INRA UMR1331 TOXALIM (Research Centre in Food Toxicology), Toulouse, France Université de Toulouse INP UPS TOXALIM, Toulouse, France
| | - Jérôme Cavaillé
- Laboratoire de Biologie Moléculaire Eucaryote, UPS Université de Toulouse, Toulouse, France CNRS LBME, UMR5099, Toulouse, France
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Abstract
There is compelling evidence from human population studies that plasma levels of high-density lipoprotein (HDL) cholesterol correlate inversely with cardiovascular risk. Identification of this relationship has stimulated research designed to understand how HDL metabolism is regulated. The ultimate goal of these studies has been to develop HDL-raising therapies that have the potential to decrease the morbidity and mortality associated with atherosclerotic cardiovascular disease. However, the situation has turned out to be much more complex than originally envisaged. This is partly because the HDL fraction consists of multiple subpopulations of particles that vary in terms of shape, size, composition, and surface charge, as well as in their potential cardioprotective properties. This heterogeneity is a consequence of the continual remodeling and interconversion of HDL subpopulations by multiple plasma factors. Evidence that the remodeling of HDLs may impact on their cardioprotective properties is beginning to emerge. This serves to highlight the importance of understanding not only how the remodeling and interconversion of HDL subpopulations is regulated but also how these processes are affected by agents that increase HDL levels. This review provides an overview of what is currently understood about HDL metabolism and how the subpopulation distribution of these lipoproteins is regulated.
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Affiliation(s)
- Kerry-Anne Rye
- From the Lipid Research Group, Centre for Vascular Research, Lowy Center, University of New South Wales, Sydney, New South Wales, Australia
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Tarrade A, Rousseau-Ralliard D, Aubrière MC, Peynot N, Dahirel M, Bertrand-Michel J, Aguirre-Lavin T, Morel O, Beaujean N, Duranthon V, Chavatte-Palmer P. Sexual dimorphism of the feto-placental phenotype in response to a high fat and control maternal diets in a rabbit model. PLoS One 2013; 8:e83458. [PMID: 24386205 PMCID: PMC3873307 DOI: 10.1371/journal.pone.0083458] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 11/03/2013] [Indexed: 12/18/2022] Open
Abstract
Maternal environment during early developmental stages plays a seminal role in the establishment of adult phenotype. Using a rabbit model, we previously showed that feeding dams with a diet supplemented with 8% fat and 0.2% cholesterol (HH diet) from the prepubertal period and throughout gestation induced metabolic syndrome in adult offspring. Here, we examined the effects of the HH diet on feto-placental phenotype at 28 days post-coïtum (term = 31 days) in relation to earlier effects in the blastocyst (Day 6). At 28 days, both male and female HH fetuses were intrauterine growth retarded and dyslipidemic, with males more affected than females. Lipid droplets accumulated in the HH placentas' trophoblast, consistent with the increased concentrations in cholesteryl esters (3.2-fold), triacylglycerol (2.5-fold) and stored FA (2.12-fold). Stored FA concentrations were significantly higher in female compared to male HH placentas (2.18-fold, p<0.01), whereas triacylglycerol was increased only in HH males. Trophoblastic lipid droplet accumulation was also observed at the blastocyst stage. The expression of numerous genes involved in lipid pathways differed significantly according to diet both in term placenta and at the blastocyst stage. Among them, the expression of LXR-α in HH placentas was reduced in HH males but not females. These data demonstrate that maternal HH diet affects the blastocyst and induces sex-dependent metabolic adaptations in the placenta, which appears to protect female fetuses from developing severe dyslipidemia.
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Affiliation(s)
- Anne Tarrade
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
- PremUp Foundation, Paris, France
| | - Delphine Rousseau-Ralliard
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
- PremUp Foundation, Paris, France
| | - Marie-Christine Aubrière
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
- PremUp Foundation, Paris, France
| | - Nathalie Peynot
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
| | - Michèle Dahirel
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
- PremUp Foundation, Paris, France
| | | | - Tiphaine Aguirre-Lavin
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
| | - Olivier Morel
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
- PremUp Foundation, Paris, France
| | - Nathalie Beaujean
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
| | - Véronique Duranthon
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
| | - Pascale Chavatte-Palmer
- INRA, UMR1198 Biologie du Développement et Reproduction, Jouy-en-Josas, France
- ENVA, Maisons Alfort, France
- PremUp Foundation, Paris, France
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Apolipoprotein A-II is a key regulatory factor of HDL metabolism as appears from studies with transgenic animals and clinical outcomes. Biochimie 2013; 96:56-66. [PMID: 24012775 DOI: 10.1016/j.biochi.2013.08.027] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 08/28/2013] [Indexed: 01/26/2023]
Abstract
The structure and metabolism of HDL are linked to their major apolipoproteins (apo) A-I and A-II. HDL metabolism is very dynamic and depends on the constant remodeling by lipases, lipid transfer proteins and receptors. HDL exert several cardioprotective effects, through their antioxidant and antiinflammatory capacities and through the stimulation of reverse cholesterol transport from extrahepatic tissues to the liver for excretion into bile. HDL also serve as plasma reservoir for C and E apolipoproteins, as transport vehicles for a great variety of proteins, and may have more physiological functions than previously recognized. In this review we will develop several aspects of HDL metabolism with emphasis on the structure/function of apo A-I and apo A-II. An important contribution to our understanding of the respective roles of apo A-I and apo A-II comes from studies using transgenic animal models that highlighted the stabilizatory role of apo A-II on HDL through inhibition of their remodeling by lipases. Clinical studies coupled with proteomic analyses revealed the presence of dysfunctional HDL in patients with cardiovascular disease. Beyond HDL cholesterol, a new notion is the functionality of HDL particles. In spite of abundant literature on HDL metabolic properties, a major question remains unanswered: which HDL particle(s) confer(s) protection against cardiovascular risk?
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Seyer A, Cantiello M, Bertrand-Michel J, Roques V, Nauze M, Bézirard V, Collet X, Touboul D, Brunelle A, Coméra C. Lipidomic and spatio-temporal imaging of fat by mass spectrometry in mice duodenum during lipid digestion. PLoS One 2013; 8:e58224. [PMID: 23560035 PMCID: PMC3616127 DOI: 10.1371/journal.pone.0058224] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 02/01/2013] [Indexed: 11/19/2022] Open
Abstract
Intestinal absorption of dietary fat is a complex process mediated by enterocytes leading to lipid assembly and secretion of circulating lipoproteins as chylomicrons, vLDL and intestinal HDL (iHDL). Understanding lipid digestion is of importance knowing the correlation between excessive fat absorption and atherosclerosis. By using time-of-flight secondary ion mass spectrometry (TOF-SIMS), we illustrated a spatio-temporal localization of fat in mice duodenum, at different times of digestion after a lipid gavage, for the first time. Fatty acids progressively increased in enterocytes as well as taurocholic acid, secreted by bile and engaged in the entero-hepatic re-absorption cycle. Cytosolic lipid droplets (CLD) from enterocytes were originally purified separating chylomicron-like, intermediate droplets and smaller HDL-like. A lipidomic quantification revealed their contents in triglycerides, free and esterified cholesterol, phosphatidylcholine, sphingomyelin and ceramides but also in free fatty acids, mono- and di-acylglycerols. An acyl-transferase activity was identified and the enzyme monoacylglycerol acyl transferase 2 (MGAT2) was immunodetected in all CLD. The largest droplets was also shown to contain the microsomal triglyceride transfer protein (MTTP), the acyl-coenzyme A-cholesterol acyltransferases (ACAT) 1 and 2, hormone sensitive lipase (HSL) and adipose triglyceride lipase (ATGL). This highlights the fact that during the digestion of fats, enterocyte CLD contain some enzymes involved in the different stages of the metabolism of diet fatty acids and cholesterol, in anticipation of the crucial work of endoplasmic reticulum in the process. The data further underlines the dual role of chylomicrons and iHDL in fat digestion which should help to efficiently complement lipid-lowering therapy.
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Affiliation(s)
- Alexandre Seyer
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, France
| | - Michela Cantiello
- Institut National de la Santé et de la Recherche Médicale (INSERM) U563, Hôpital Purpan, Toulouse, France
| | - Justine Bertrand-Michel
- Institut National de la Santé et de la Recherche Médicale U1048, Hôpital Rangueil, Toulouse, France
| | - Véronique Roques
- Institut National de la Santé et de la Recherche Médicale U1048, Hôpital Rangueil, Toulouse, France
| | - Michel Nauze
- Institut National de la Santé et de la Recherche Médicale U1048, Hôpital Rangueil, Toulouse, France
| | - Valérie Bézirard
- Institut National de la Recherche Agronomique (INRA) UMR 1331, TOXALIM, Toulouse, France
| | - Xavier Collet
- Institut National de la Santé et de la Recherche Médicale U1048, Hôpital Rangueil, Toulouse, France
| | - David Touboul
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, France
| | - Alain Brunelle
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, France
| | - Christine Coméra
- Institut National de la Santé et de la Recherche Médicale (INSERM) U563, Hôpital Purpan, Toulouse, France
- Institut National de la Recherche Agronomique (INRA) UMR 1331, TOXALIM, Toulouse, France
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Badin PM, Vila IK, Louche K, Mairal A, Marques MA, Bourlier V, Tavernier G, Langin D, Moro C. High-fat diet-mediated lipotoxicity and insulin resistance is related to impaired lipase expression in mouse skeletal muscle. Endocrinology 2013; 154:1444-53. [PMID: 23471217 DOI: 10.1210/en.2012-2029] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Elevated expression/activity of adipose triglyceride lipase (ATGL) and/or reduced activity of hormone-sensitive lipase (HSL) in skeletal muscle are causally linked to insulin resistance in vitro. We investigated here the effect of high-fat feeding on skeletal muscle lipolytic proteins, lipotoxicity, and insulin signaling in vivo. Five-week-old C3H mice were fed normal chow diet (NCD) or 45% kcal high-fat diet (HFD) for 4 weeks. Wild-type and HSL knockout mice fed NCD were also studied. Whole-body and muscle insulin sensitivity, as well as lipolytic protein expression, lipid levels, and insulin signaling in skeletal muscle, were measured. HFD induced whole-body insulin resistance and glucose intolerance and reduced skeletal muscle glucose uptake compared with NCD. HFD increased skeletal muscle total diacylglycerol (DAG) content, protein kinase Cθ and protein kinase Cε membrane translocation, and impaired insulin signaling as reflected by a robust increase of basal Ser1101 insulin receptor substrate 1 phosphorylation (2.8-fold, P < .05) and a decrease of insulin-stimulated v-Akt murine thymoma viral oncogene homolog Ser473 (-37%, P < .05) and AS160 Thr642 (-47%, P <.01) phosphorylation. We next showed that HFD strongly reduced HSL phosphorylation at Ser660. HFD significantly up-regulated the muscle protein content of the ATGL coactivator comparative gene identification 58 and triacylglycerol hydrolase activity, despite a lower ATGL protein content. We further show a defective skeletal muscle insulin signaling and DAG accumulation in HSL knockout compared with wild-type mice. Together, these data suggest a pathophysiological link between altered skeletal muscle lipase expression and DAG-mediated insulin resistance in mice.
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Affiliation(s)
- Pierre-Marie Badin
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1048, Obesity Research Laboratory, Institute of Metabolic and Cardiovascular Diseases, 31432 Toulouse Cedex 4, France
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Villard EF, EI Khoury P, Frisdal E, Bruckert E, Clement K, Bonnefont-Rousselot D, Bittar R, Le Goff W, Guerin M. Genetic determination of plasma cholesterol efflux capacity is gender-specific and independent of HDL-cholesterol levels. Arterioscler Thromb Vasc Biol 2013; 33:822-8. [PMID: 23372063 DOI: 10.1161/atvbaha.112.300979] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We investigated the impact of several genetic variants located in genes encoding for proteins involved in biogenesis, maturation, and intravascular remodeling of high density lipoprotein (HDL) particles on plasma efflux capacity. APPROACH AND RESULTS The capacity of whole-plasma to mediate cholesterol efflux from cholesterol-loaded human THP-1 macrophages was measured in 846 individuals (450 men and 396 women). We demonstrated that rs17231506 (CETP c.-1337 C>T), rs2230806 (ABCA1 p.R219K), rs1799837 (APOA1 c.-75 G>A), rs5086 (APOAII c.-265 T>C), and rs1800588 (LIPC c.-514 C>T) single nucleotide polymorphisms (SNPs) significantly modulate the capacity of whole-plasma to mediate cholesterol efflux from human macrophages in a sex-dependent manner. Such associations were independent of circulating plasma lipid levels (HDL-cholesterol, triglyceride, low density lipoprotein-cholesterol). In women, we identified the APOA1 c.-75 G>A and the LIPC c.-514 C>T variants as major contributors of interindividual variability of plasma efflux capacity, whereas the ABCA1 p.R219K and the APOAII c.-265 T>C SNPs mostly contribute to total variance of plasma efflux capacity in men. Multiple regression analyses revealed that the 7 SNPs tested accounted together for approximately 6% of total plasma efflux capacity. We demonstrated that genetically determined plasma efflux capacity represents a better predictor of macrophage cholesterol removal, as compared with plasma HDL-cholesterol levels. CONCLUSIONS Genetic variants located within genes encoding proteins involved in HDL metabolism significantly impact plasma efflux capacity independently of variation in plasma HDL-cholesterol levels.
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Affiliation(s)
- Elise F Villard
- INSERM UMRS 939, Hôpital de la Pitié, Pavillon Benjamin Delessert, 83, Boulevard de l'Hôpital, 75651 Paris Cedex 13, France
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Benhamed F, Denechaud PD, Lemoine M, Robichon C, Moldes M, Bertrand-Michel J, Ratziu V, Serfaty L, Housset C, Capeau J, Girard J, Guillou H, Postic C. The lipogenic transcription factor ChREBP dissociates hepatic steatosis from insulin resistance in mice and humans. J Clin Invest 2012; 122:2176-94. [PMID: 22546860 DOI: 10.1172/jci41636] [Citation(s) in RCA: 295] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Accepted: 02/15/2012] [Indexed: 12/12/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is associated with all features of the metabolic syndrome. Although deposition of excess triglycerides within liver cells, a hallmark of NAFLD, is associated with a loss of insulin sensitivity, it is not clear which cellular abnormality arises first. We have explored this in mice overexpressing carbohydrate responsive element-binding protein (ChREBP). On a standard diet, mice overexpressing ChREBP remained insulin sensitive, despite increased expression of genes involved in lipogenesis/fatty acid esterification and resultant hepatic steatosis (simple fatty liver). Lipidomic analysis revealed that the steatosis was associated with increased accumulation of monounsaturated fatty acids (MUFAs). In primary cultures of mouse hepatocytes, ChREBP overexpression induced expression of stearoyl-CoA desaturase 1 (Scd1), the enzyme responsible for the conversion of saturated fatty acids (SFAs) into MUFAs. SFA impairment of insulin-responsive Akt phosphorylation was therefore rescued by the elevation of Scd1 levels upon ChREBP overexpression, whereas pharmacological or shRNA-mediated reduction of Scd1 activity decreased the beneficial effect of ChREBP on Akt phosphorylation. Importantly, ChREBP-overexpressing mice fed a high-fat diet showed normal insulin levels and improved insulin signaling and glucose tolerance compared with controls, despite having greater hepatic steatosis. Finally, ChREBP expression in liver biopsies from patients with nonalcoholic steatohepatitis was increased when steatosis was greater than 50% and decreased in the presence of severe insulin resistance. Together, these results demonstrate that increased ChREBP can dissociate hepatic steatosis from insulin resistance, with beneficial effects on both glucose and lipid metabolism.
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Albecka A, Belouzard S, Op de Beeck A, Descamps V, Goueslain L, Bertrand-Michel J, Tercé F, Duverlie G, Rouillé Y, Dubuisson J. Role of low-density lipoprotein receptor in the hepatitis C virus life cycle. Hepatology 2012; 55:998-1007. [PMID: 22121002 DOI: 10.1002/hep.25501] [Citation(s) in RCA: 124] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
UNLABELLED Hepatitis C virus (HCV) particles are known to be in complex with lipoproteins. As a result of this interaction, the low-density lipoprotein (LDL) receptor (LDLR) has been proposed as a potential entry factor for HCV; however, its implication in virus entry remains unclear. Here, we reinvestigated the role of the LDLR in the HCV life cycle by comparing virus entry to the mechanism of lipoprotein uptake. A small interfering RNA targeting the LDLR in Huh-7 cells reduced HCV infectivity, confirming that this receptor plays a role in the life cycle of HCV generated in cell culture. However, kinetics of internalization were much faster for lipoproteins than for infectious HCV particles. Furthermore, a decrease in HCV RNA replication was observed by blocking the LDLR with a specific antibody, and this was associated with an increase in the ratio of phosphatidylethanolamine to phosphatidylcholine in host cells. Nevertheless, a soluble form of the LDLR inhibited both HCV entry into the hepatocytes and its binding to the LDLR expressed on Chinese hamster ovary cells, suggesting a direct interaction between the HCV particle and the LDLR. Finally, we showed that modification of HCV particles by lipoprotein lipase (LPL) reduces HCV infectivity and increases HCV binding to LDLR. Importantly, LPL treatment also induced an increase in RNA internalization, suggesting that LDLR, at least in some conditions, leads to nonproductive internalization of HCV. CONCLUSION The LDLR is not essential for infectious HCV particle entry, whereas the physiological function of this receptor is important for optimal replication of the HCV genome.
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Affiliation(s)
- Anna Albecka
- Institut Pasteur de Lille, Center for Infection and Immunity of Lille, Lille, France
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Salles J, Tardif N, Landrier JF, Mothe-Satney I, Guillet C, Boue-Vaysse C, Combaret L, Giraudet C, Patrac V, Bertrand-Michel J, Denis P, Chardigny JM, Boirie Y, Walrand S. TNFα gene knockout differentially affects lipid deposition in liver and skeletal muscle of high-fat-diet mice. J Nutr Biochem 2012; 23:1685-93. [PMID: 22464148 DOI: 10.1016/j.jnutbio.2011.12.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 12/01/2011] [Accepted: 12/02/2011] [Indexed: 12/31/2022]
Abstract
AIMS/HYPOTHESIS Inflammation and ectopic lipid deposition contribute to obesity-related insulin resistance (IR). Studies have shown that deficiency of the proinflammatory cytokine tumor necrosis factor-α (TNFα) protects against the IR induced by a high-fat diet (HFD). We aimed to evaluate the relationship between HFD-related inflammation and lipid deposition in skeletal muscle and liver. EXPERIMENTAL DESIGN Wild-type (WT) and TNFα-deficient (TNFα-KO) mice were subjected to an HFD for 12 weeks. A glucose tolerance test was performed to evaluate IR. Inflammatory status was assessed by measuring plasma and tissue transcript levels of cytokines. Lipid intermediate concentrations were measured in plasma, muscle and liver. The expression of genes involved in fatty acid transport, synthesis and oxidation was analyzed in adipose tissue, muscle and liver. RESULTS HFD induced a higher body weight gain in TNFα-KO mice than in WT mice. The weight of epididymal and abdominal adipose tissues was twofold lower in WT mice than in TNFα-KO mice, whereas liver weight was significantly heavier in WT mice. IR, systemic and adipose tissue inflammation, and plasma nonesterified fatty acid levels were reduced in TNFα-KO mice fed an HFD. TNFα deficiency improved fatty acid metabolism and had a protective effect against lipid deposition, inflammation and fibrosis associated with HFD in liver but had no impact on these markers in muscle. CONCLUSIONS Our data suggest that in an HFD context, TNFα deficiency reduced hepatic lipid accumulation through two mechanisms: an increase in adipose tissue storage capacity and a decrease in fatty acid uptake and synthesis in the liver.
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Affiliation(s)
- Jérôme Salles
- INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
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Attané C, Foussal C, Le Gonidec S, Benani A, Daviaud D, Wanecq E, Guzmán-Ruiz R, Dray C, Bezaire V, Rancoule C, Kuba K, Ruiz-Gayo M, Levade T, Penninger J, Burcelin R, Pénicaud L, Valet P, Castan-Laurell I. Apelin treatment increases complete Fatty Acid oxidation, mitochondrial oxidative capacity, and biogenesis in muscle of insulin-resistant mice. Diabetes 2012; 61:310-20. [PMID: 22210322 PMCID: PMC3266414 DOI: 10.2337/db11-0100] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Both acute and chronic apelin treatment have been shown to improve insulin sensitivity in mice. However, the effects of apelin on fatty acid oxidation (FAO) during obesity-related insulin resistance have not yet been addressed. Thus, the aim of the current study was to determine the impact of chronic treatment on lipid use, especially in skeletal muscles. High-fat diet (HFD)-induced obese and insulin-resistant mice treated by an apelin injection (0.1 μmol/kg/day i.p.) during 4 weeks had decreased fat mass, glycemia, and plasma levels of triglycerides and were protected from hyperinsulinemia compared with HFD PBS-treated mice. Indirect calorimetry experiments showed that apelin-treated mice had a better use of lipids. The complete FAO, the oxidative capacity, and mitochondrial biogenesis were increased in soleus of apelin-treated mice. The action of apelin was AMP-activated protein kinase (AMPK) dependent since all the effects studied were abrogated in HFD apelin-treated mice with muscle-specific inactive AMPK. Finally, the apelin-stimulated improvement of oxidative capacity led to decreased levels of acylcarnitines and enhanced insulin-stimulated glucose uptake in soleus. Thus, by promoting complete lipid use in muscle of insulin-resistant mice through mitochondrial biogenesis and tighter matching between FAO and the tricarboxylic acid cycle, apelin treatment could contribute to insulin sensitivity improvement.
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Affiliation(s)
- Camille Attané
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Camille Foussal
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Sophie Le Gonidec
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Alexandre Benani
- Centre des Sciences du Goût et de l'Alimentation, Unité Mixte de Recherche 6265–Centre National de la Recherche Scientifique 13241–Institut National de la Recherche Agronomique, Université de Bourgogne, Dijon, France
| | - Danièle Daviaud
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Estelle Wanecq
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Rocío Guzmán-Ruiz
- Departemento de Ciencias Farmacéuticas y de la Alimentación, School of Pharmacy, University CEU–San Pablo, Madrid, Spain
| | - Cédric Dray
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Veronic Bezaire
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Chloé Rancoule
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Keiji Kuba
- Department of Biological Informatics and Experimental Therapeutics, Akita University Graduate School of Medicine, Akita, Japan
| | - Mariano Ruiz-Gayo
- Departemento de Ciencias Farmacéuticas y de la Alimentación, School of Pharmacy, University CEU–San Pablo, Madrid, Spain
| | - Thierry Levade
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | | | - Rémy Burcelin
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Luc Pénicaud
- Centre des Sciences du Goût et de l'Alimentation, Unité Mixte de Recherche 6265–Centre National de la Recherche Scientifique 13241–Institut National de la Recherche Agronomique, Université de Bourgogne, Dijon, France
| | - Philippe Valet
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Isabelle Castan-Laurell
- INSERM U1048, Toulouse, France
- Université de Toulouse, Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
- Corresponding author: Isabelle Castan-Laurell,
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Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salomé L, Joly E. Proteolipidic composition of exosomes changes during reticulocyte maturation. J Biol Chem 2011; 286:34426-39. [PMID: 21828046 DOI: 10.1074/jbc.m111.257444] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
During the orchestrated process leading to mature erythrocytes, reticulocytes must synthesize large amounts of hemoglobin, while eliminating numerous cellular components. Exosomes are small secreted vesicles that play an important role in this process of specific elimination. To understand the mechanisms of proteolipidic sorting leading to their biogenesis, we have explored changes in the composition of exosomes released by reticulocytes during their differentiation, in parallel to their physical properties. By combining proteomic and lipidomic approaches, we found dramatic alterations in the composition of the exosomes retrieved over the course of a 7-day in vitro differentiation protocol. Our data support a previously proposed model, whereby in reticulocytes the biogenesis of exosomes involves several distinct mechanisms for the preferential recruitment of particular proteins and lipids and suggest that the respective prominence of those pathways changes over the course of the differentiation process.
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Affiliation(s)
- Kévin Carayon
- CNRS, Institute of Pharmacology and Structural Biology, 205 Route de Narbonne, France.
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Guey LT, Pullinger CR, Ishida BY, O'Connor PM, Zellner C, Francone OL, Laramie JM, Naya-Vigne JM, Siradze KA, Deedwania P, Redberg RF, Frost PH, Seymour AB, Kane JP, Malloy MJ. Relation of increased prebeta-1 high-density lipoprotein levels to risk of coronary heart disease. Am J Cardiol 2011; 108:360-6. [PMID: 21757044 DOI: 10.1016/j.amjcard.2011.03.054] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 03/18/2011] [Accepted: 03/18/2011] [Indexed: 01/23/2023]
Abstract
Preβ-1 high-density lipoprotein (HDL) plays a key role in reverse cholesterol transport by promoting cholesterol efflux. Our aims were (1) to test previous associations between preβ-1 HDL and coronary heart disease (CHD) and (2) to investigate whether preβ-1 HDL levels also are associated with risk of myocardial infarction (MI). Plasma preβ-1 HDL was measured by an ultrafiltration-isotope dilution technique in 1,255 subjects recruited from the University of California-San Francisco Lipid and Cardiovascular Clinics and collaborating cardiologists. Preβ-1 HDL was significantly and positively associated with CHD and MI even after adjustment for established risk factors. Inclusion of preβ-1 HDL in a multivariable model for CHD led to a modest improvement in reclassification of subjects (net reclassification index 0.15, p = 0.01; integrated discrimination improvement 0.003, p = 0.2). In contrast, incorporation of preβ-1 HDL into a risk model of MI alone significantly improved reclassification of subjects (net reclassification index 0.21, p = 0.008; integrated discrimination improvement 0.01, p = 0.02), suggesting that preβ-1 HDL has more discriminatory power for MI than for CHD in our study population. In conclusion, these results confirm previous associations between preβ-1 HDL and CHD in a large well-characterized clinical cohort. Also, this is the first study in which preβ-1 HDL was identified as a novel and independent predictor of MI above and beyond traditional CHD risk factors.
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Anthérieu S, Rogue A, Fromenty B, Guillouzo A, Robin MA. Induction of vesicular steatosis by amiodarone and tetracycline is associated with up-regulation of lipogenic genes in HepaRG cells. Hepatology 2011; 53:1895-905. [PMID: 21391224 DOI: 10.1002/hep.24290] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 02/25/2011] [Indexed: 12/13/2022]
Abstract
UNLABELLED Drug-induced liver injury occurs in general after several weeks and is often unpredictable. It is characterized by a large spectrum of lesions that includes steatosis and phospholipidosis. Many drugs such as amiodarone and tetracycline have been reported to cause phospholipidosis and/or steatosis. In this study, acute and chronic hepatic effects of these two drugs were investigated using well-differentiated human hepatoma HepaRG cells. Accumulation of typical lipid droplets, labeled with Oil Red O, was observed in hepatocyte-like HepaRG cells after repeat exposure to either drug. Amiodarone caused the formation of additional intracytoplasmic vesicles that did not stain in all HepaRG cells. At the electron microscopic level, these vesicles appeared as typical lamellar bodies and were associated with an increase of phosphatidylethanolamine and phosphatidylcholine. A dose-dependent induction of triglycerides (TG) was observed after repeat exposure to either amiodarone or tetracycline. Several genes known to be related to lipogenesis were induced after treatment by these two drugs. By contrast, opposite deregulation of some of these genes (FASN, SCD1, and THSRP) was observed in fat HepaRG cells induced by oleic acid overload, supporting the conclusion that different mechanisms were involved in the induction of steatosis by drugs and oleic acid. Moreover, several genes related to lipid droplet formation (ADFP, PLIN4) were up-regulated after exposure to both drugs and oleic acid. CONCLUSION Our results show that amiodarone causes phospholipidosis after short-term treatment and, like tetracycline, induces vesicular steatosis after repeat exposure in HepaRG cells. These data represent the first demonstration that drugs can induce vesicular steatosis in vitro and show a direct relationship between TG accumulation and enhanced expression of lipogenic genes.
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Tian L, Liu Y, Qin Y, Long S, Xu Y, Fu M. Association of the low-density lipoprotein cholesterol/high-density lipoprotein cholesterol ratio and concentrations of plasma lipids with high-density lipoprotein subclass distribution in the Chinese population. Lipids Health Dis 2010; 9:69. [PMID: 20615262 PMCID: PMC2920871 DOI: 10.1186/1476-511x-9-69] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Accepted: 07/09/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To evaluate the relationship between the low-density lipoprotein cholesterol (LDL-C)/high-density lipoprotein cholesterol (HDL-C) ratio and HDL subclass distribution and to further examine and discuss the potential impact of LDL-C and HDL-C together with TG on HDL subclass metabolism. RESULTS Small-sized prebeta1-HDL, HDL3b and HDL3a increased significantly while large-sized HDL2a and HDL2b decreased significantly as the LDL-C/HDL-C ratio increased. The subjects in low HDL-C level (< 1.03 mmol/L) who had an elevation of the LDL-C/HDL-C ratio and a reduction of HDL2b/prebeta1-HDL regardless of an undesirable or high LDL-C level. At desirable LDL-C levels (< 3.34 mmol/L), the HDL2b/prebeta1-HDL ratio was 5.4 for the subjects with a high HDL-C concentration (> or = 1.55 mmol/L); however, at high LDL-C levels (> or = 3.36 mmol/L), the ratio of LDL-C/HDL-C was 2.8 in subjects, and an extremely low HDL2b/prebeta1-HDL value although with high HDL-C concentration. CONCLUSION With increase of the LDL-C/HDL-C ratio, there was a general shift toward smaller-sized HDL particles, which implied that the maturation process of HDL was blocked. High HDL-C concentrations can regulate the HDL subclass distribution at desirable and borderline LDL-C levels but cannot counteract the influence of high LDL-C levels on HDL subclass distribution.
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Affiliation(s)
- Li Tian
- Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, Sichuan, China
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Miyazaki O, Fukamachi I. Preβ1-HDL, a key element of reverse cholesterol transport: its potential as a biomarker. ACTA ACUST UNITED AC 2010. [DOI: 10.2217/clp.10.17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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50
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Impact of android overweight or obesity and insulin resistance on basal and postprandial SR-BI and ABCA1-mediated serum cholesterol efflux capacities. Atherosclerosis 2010; 209:422-9. [DOI: 10.1016/j.atherosclerosis.2009.09.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 09/17/2009] [Accepted: 09/18/2009] [Indexed: 10/20/2022]
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