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Chemello K, Beeské S, Trang Tran TT, Blanchard V, Villard EF, Poirier B, Le Bail JC, Dargazanli G, Ho-Van-Guimbal S, Boulay D, Bergis O, Pruniaux MP, Croyal M, Janiak P, Guillot E, Lambert G. Lipoprotein(a) Cellular Uptake Ex Vivo and Hepatic Capture In Vivo Is Insensitive to PCSK9 Inhibition With Alirocumab. JACC Basic Transl Sci 2020; 5:549-557. [PMID: 32613143 PMCID: PMC7315184 DOI: 10.1016/j.jacbts.2020.03.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 03/11/2020] [Accepted: 03/11/2020] [Indexed: 12/11/2022]
Abstract
Modulating LDL receptor expression genetically (in familial hypercholesterolemia) or pharmacologically (using statins or the PCSK9 inhibitor alirocumab) does not alter the cellular uptake of Lp(a) in primary human lymphocytes. Lp(a) hepatic capture is not modulated by PCSK9 inhibition with alirocumab in liver-humanized mice. LDLR does not appear to play a significant role in mediating Lp(a) plasma clearance in vivo.
Lipoprotein(a) (Lp[a]) is the most common genetically inherited risk factor for cardiovascular disease. Many aspects of Lp(a) metabolism remain unknown. We assessed the uptake of fluorescent Lp(a) in primary human lymphocytes as well as Lp(a) hepatic capture in a mouse model in which endogenous hepatocytes have been ablated and replaced with human ones. Modulation of LDLR expression with the PCSK9 inhibitor alirocumab did not alter the cellular or the hepatic uptake of Lp(a), demonstrating that the LDL receptor is not a major route for Lp(a) plasma clearance. These results have clinical implications because they underpin why statins are not efficient at reducing Lp(a).
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Key Words
- 3D, 3-dimensional
- AU, arbitrary unit
- BSA, bovine serum albumin
- ELISA, enzyme-linked immunosorbent assay
- FCR, fractional catabolic rate
- FRG, Fah(−/−)Rag2(−/−)Il2rg(−/−)
- HoFH, homozygous familial hypercholesterolemia
- LC-MS/MS, liquid chromatography tandem mass spectrometry
- LDL, low-density lipoprotein
- LDL-C, low-density lipoprotein cholesterol
- LDLR, low-density lipoprotein receptor
- Lp(a), lipoprotein(a)
- MFI, mean fluorescence intensity
- PBMC, peripheral blood mononuclear cell
- PBS, phosphate-buffered saline
- PCSK9, proprotein convertase subtilisin/kexin type 9
- apoB100, apolipoprotein B100
- bodipy, boron dipyrromethene
- lipoprotein(a)
- liver-humanized mice
- low-density lipoprotein receptor
- proprotein convertase subtilisin/kexin type 9
- rPCSK9, recombinant proprotein convertase subtilisin/kexin type 9
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Affiliation(s)
- Kévin Chemello
- Laboratoire Inserm UMR 1188 DéTROI, Université de La Réunion, Sainte Clotilde, France
| | | | | | - Valentin Blanchard
- Laboratoire Inserm UMR 1188 DéTROI, Université de La Réunion, Sainte Clotilde, France
| | | | | | | | | | | | | | | | | | - Mikaël Croyal
- Université de Nantes, CRNH Ouest, Inra UMR 1280 PhAN, Nantes, France
| | | | | | - Gilles Lambert
- Laboratoire Inserm UMR 1188 DéTROI, Université de La Réunion, Sainte Clotilde, France
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2
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Villard EF, Thedrez A, Blankenstein J, Croyal M, Tran TTT, Poirier B, Le Bail JC, Illiano S, Nobécourt E, Krempf M, Blom DJ, Marais AD, Janiak P, Muslin AJ, Guillot E, Lambert G. PCSK9 Modulates the Secretion But Not the Cellular Uptake of Lipoprotein(a) Ex Vivo: An Effect Blunted by Alirocumab. ACTA ACUST UNITED AC 2016; 1:419-427. [PMID: 29308438 PMCID: PMC5753417 DOI: 10.1016/j.jacbts.2016.06.006] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Unlike LDL uptake, Lp(a) uptake is not altered by PCSK9 or PCSK9 inhibition in primary human hepatocytes and in primary dermal fibroblasts isolated from familial hypercholesterolemic and non–familial hypercholesterolemic patients. Lp(a) uptake is occurring in the absence of a functional LDL receptor and is not affected by LDL receptor blockade with monoclonal antibodies. Lp(a) cellular binding and whole particle uptake are not altered by PCSK9. The secretion of Lp(a) from primary human hepatocytes is enhanced by PCSK9, an effect that is blunted by PCSK9 inhibition with alirocumab.
To elucidate how the proprotein convertase subtilisin kexin type 9 (PCSK9) inhibitor alirocumab modulates lipoprotein(a) [Lp(a)] plasma levels, the authors performed a series of Lp(a) uptake studies in primary human hepatocytes and dermal fibroblasts and measured Lp(a) secretion from human hepatocytes. They found that Lp(a) cellular uptake occurred in a low-density lipoprotein receptor–independent manner. Neither PCSK9 nor alirocumab altered Lp(a) internalization. By contrast, the secretion of apolipoprotein (a) from human hepatocytes was sharply increased by PCSK9, an effect that was reversed by alirocumab. They propose that PCSK9 does not significantly modulate Lp(a) catabolism, but rather enhances the secretion of Lp(a) from liver cells.
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Affiliation(s)
| | - Aurélie Thedrez
- Inra UMR 1280, Nantes, France.,Université de Nantes UMR1280, Faculté de Médecine, Nantes, France
| | | | | | | | - Bruno Poirier
- Sanofi Recherche Développement, Chilly-Mazarin, France
| | | | | | - Estelle Nobécourt
- Inra UMR 1280, Nantes, France.,Université de Nantes UMR1280, Faculté de Médecine, Nantes, France
| | - Michel Krempf
- Inra UMR 1280, Nantes, France.,Université de Nantes UMR1280, Faculté de Médecine, Nantes, France
| | - Dirk J Blom
- Division of Lipidology, Department of Internal Medicine, University of Cape Town, Cape Town, South Africa
| | - A David Marais
- Division of Chemical Pathology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Philip Janiak
- Sanofi Recherche Développement, Chilly-Mazarin, France
| | | | | | - Gilles Lambert
- Inra UMR 1280, Nantes, France.,Inserm UMR 1188, Sainte-Clotilde, France.,Université de la Réunion UMR1188, Faculté de Médecine, Saint-Denis, France.,CHU de la Réunion, Saint Denis, France
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3
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Frisdal E, Le Lay S, Hooton H, Poupel L, Olivier M, Alili R, Plengpanich W, Villard EF, Gilibert S, Lhomme M, Superville A, Miftah-Alkhair L, Chapman MJ, Dallinga-Thie GM, Venteclef N, Poitou C, Tordjman J, Lesnik P, Kontush A, Huby T, Dugail I, Clement K, Guerin M, Le Goff W. Adipocyte ATP-binding cassette G1 promotes triglyceride storage, fat mass growth, and human obesity. Diabetes 2015; 64:840-55. [PMID: 25249572 DOI: 10.2337/db14-0245] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The role of the ATP-binding cassette G1 (ABCG1) transporter in human pathophysiology is still largely unknown. Indeed, beyond its role in mediating free cholesterol efflux to HDL, the ABCG1 transporter equally promotes lipid accumulation in a triglyceride (TG)-rich environment through regulation of the bioavailability of lipoprotein lipase (LPL). Because both ABCG1 and LPL are expressed in adipose tissue, we hypothesized that ABCG1 is implicated in adipocyte TG storage and therefore could be a major actor in adipose tissue fat accumulation. Silencing of Abcg1 expression by RNA interference in 3T3-L1 preadipocytes compromised LPL-dependent TG accumulation during the initial phase of differentiation. Generation of stable Abcg1 knockdown 3T3-L1 adipocytes revealed that Abcg1 deficiency reduces TG storage and diminishes lipid droplet size through inhibition of Pparγ expression. Strikingly, local inhibition of adipocyte Abcg1 in adipose tissue from mice fed a high-fat diet led to a rapid decrease of adiposity and weight gain. Analysis of two frequent ABCG1 single nucleotide polymorphisms (rs1893590 [A/C] and rs1378577 [T/G]) in morbidly obese individuals indicated that elevated ABCG1 expression in adipose tissue was associated with increased PPARγ expression and adiposity concomitant to increased fat mass and BMI (haplotype AT>GC). The critical role of ABCG1 in obesity was further confirmed in independent populations of severe obese and diabetic obese individuals. This study identifies for the first time a major role of adipocyte ABCG1 in adiposity and fat mass growth and suggests that adipose ABCG1 might represent a potential therapeutic target in obesity.
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Affiliation(s)
- Eric Frisdal
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | | | - Henri Hooton
- Université Pierre et Marie Curie-Paris 6, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France
| | - Lucie Poupel
- Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Maryline Olivier
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France
| | - Rohia Alili
- Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France
| | - Wanee Plengpanich
- INSERM, UMR_S1166, Team 4, Paris, France King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Patumwan, Bangkok, Thailand
| | - Elise F Villard
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Sophie Gilibert
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Marie Lhomme
- Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Alexandre Superville
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | | | - M John Chapman
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France
| | | | - Nicolas Venteclef
- Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France
| | - Christine Poitou
- Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France Heart and Metabolism, Assistance-Publique Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Paris, France
| | - Joan Tordjman
- Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France
| | - Philippe Lesnik
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Anatol Kontush
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Thierry Huby
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Isabelle Dugail
- Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France
| | - Karine Clement
- Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France INSERM, U872, Nutriomique Team 7, Cordeliers Research Center, Paris, France Heart and Metabolism, Assistance-Publique Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Paris, France
| | - Maryse Guerin
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
| | - Wilfried Le Goff
- INSERM, UMR_S1166, Team 4, Paris, France Université Pierre et Marie Curie-Paris 6, Paris, France Institute of Cardiometabolism and Nutrition, Pitié-Salpêtrière Hospital, Paris, France
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4
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El Khoury P, Ghislain M, Villard EF, Le Goff W, Lascoux-Combe C, Yeni P, Meyer L, Vigouroux C, Goujard C, Guerin M. Plasma cholesterol efflux capacity from human THP-1 macrophages is reduced in HIV-infected patients: impact of HAART. J Lipid Res 2015; 56:692-702. [PMID: 25573889 DOI: 10.1194/jlr.m054510] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The capacity of HDL to remove cholesterol from macrophages is inversely associated with the severity of angiographic coronary artery disease. The effect of human immunodeficiency virus (HIV) infection or its treatment on the ability of HDL particles to stimulate cholesterol efflux from human macrophages has never been studied. We evaluated the capacity of whole plasma and isolated HDL particles from HIV-infected subjects (n = 231) and uninfected controls (n = 200), as well as in a subset of 41 HIV subjects receiving highly active antiretroviral therapy (HAART) to mediate cholesterol efflux from human macrophages. Plasma cholesterol efflux capacity was reduced (-12%; P = 0.001) in HIV patients as compared with controls. HIV infection reduced by 27% (P < 0.05) the capacity of HDL subfractions to promote cholesterol efflux from macrophages. We observed a reduced ABCA1-dependent efflux capacity of plasma (-27%; P < 0.0001) from HIV-infected subjects as a result of a reduction in the efflux capacity of HDL3 particles. HAART administration restored the capacity of plasma from HIV patients to stimulate cholesterol efflux from human macrophages (9.4%; P = 0.04). During HIV infection, the capacity of whole plasma to remove cholesterol from macrophages is reduced, thus potentially contributing to the increased coronary heart disease in the HIV population. HAART administration restored the removal of cholesterol from macrophages by increasing HDL functionality.
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Affiliation(s)
- Petra El Khoury
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMRS1166, Hôpital de la Pitié, Paris, France; Sorbonne Universités, UMPC Univ Paris 6, Paris, France; Université Saint Joseph, Faculté de pharmacie, Beyrouth, Liban
| | - Mathilde Ghislain
- INSERM, UMRS 1018, CESP, Le Kremlin-Bicêtre, France; Service d'Epidémiologie et de Santé Publique, Hôpital Bicêtre, Assistance Publique-Hôpitaux de Paris (AP-HP), Le Kremlin-Bicêtre, France
| | - Elise F Villard
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMRS1166, Hôpital de la Pitié, Paris, France; Sorbonne Universités, UMPC Univ Paris 6, Paris, France
| | - Wilfried Le Goff
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMRS1166, Hôpital de la Pitié, Paris, France; Sorbonne Universités, UMPC Univ Paris 6, Paris, France; ICAN Institute of Cardiometabolism and Nutrition, Hôpital de la Pitié, Paris, France
| | | | - Patrick Yeni
- Service de Maladies Infectieuses, Hôpital Bichat, AP-HP, Paris, France
| | - Laurence Meyer
- INSERM, UMRS 1018, CESP, Le Kremlin-Bicêtre, France; Service d'Epidémiologie et de Santé Publique, Hôpital Bicêtre, Assistance Publique-Hôpitaux de Paris (AP-HP), Le Kremlin-Bicêtre, France; Université Paris-Sud, Le Kremlin-Bicêtre, France
| | - Corinne Vigouroux
- Sorbonne Universités, UMPC Univ Paris 6, Paris, France; ICAN Institute of Cardiometabolism and Nutrition, Hôpital de la Pitié, Paris, France; Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Antoine, Laboratoire de Biologie et Génétique Moléculaires, Paris, France; INSERM UMRS938, Centre de recherche Saint-Antoine, Paris, France
| | - Cécile Goujard
- INSERM, UMRS 1018, CESP, Le Kremlin-Bicêtre, France; Université Paris-Sud, Le Kremlin-Bicêtre, France; Service de Médecine Interne, Hôpital Bicêtre, AP-HP, Le Kremlin-Bicêtre, France
| | - Maryse Guerin
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMRS1166, Hôpital de la Pitié, Paris, France; Sorbonne Universités, UMPC Univ Paris 6, Paris, France; ICAN Institute of Cardiometabolism and Nutrition, Hôpital de la Pitié, Paris, France.
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5
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Szalat R, Pirault J, Fermand JP, Carrié A, Saint-Charles F, Olivier M, Robillard P, Frisdal E, Villard EF, Cathébras P, Bruckert E, Chapman MJ, Giral P, Guerin M, Lesnik P, Le Goff W. Physiopathology of necrobiotic xanthogranuloma with monoclonal gammopathy. J Intern Med 2014; 276:269-84. [PMID: 24428816 PMCID: PMC4279948 DOI: 10.1111/joim.12195] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
RATIONALE Xanthomatosis associated with monoclonal gammopathy includes hyperlipidaemic xanthoma (HX), normolipidaemic xanthoma (NX) and necrobiotic xanthogranuloma (NXG). All three pathologies are characterized by skin or visceral lesions related to cholesterol accumulation, monoclonal immunoglobulin (MIg) and hypocomplementemia. The pathophysiology underlying NXG remains unknown although the involvement of MIg is suspected. OBJECTIVE To provide further insights into the pathophysiology of NXG, we evaluated the plasma lipid phenotype, mechanisms involved in cellular cholesterol accumulation and role of MIg in an analysis of blood and plasma markers of inflammation in 16 patients with xanthomatosis [NXG (n = 8) and NX (n = 8)] associated with monoclonal IgG relative to the relevant controls. RESULTS The lipid profile of patients with NXG was characterized by a low HDL-C phenotype and an abnormal distribution of HDL particles. Sera from patients with NXG induced cholesterol accumulation in human macrophages. This accumulation was due in part to a significant reduction in the HDL capacity to promote cholesterol efflux from macrophages, which was not found in the case of NX. The MIg of NXG and NX patients was tested positively by ELISA to recognize a large spectrum of lipoproteins. High plasma levels of pro-inflammatory cytokines (TNFα and IL-6), soluble cytokine receptors (sIL-6R, sTNFRI and sTNFRII), adhesion molecules (VCAM-1 and ICAM-1) and chemokines (MCP-1, IL-8 and MIP-1α) were observed in both patients with NXG and NX, revealing a specific xanthoma inflammatory signature which was inversely correlated with plasma levels of anti-inflammatory HDL. However, patients with NXG were distinguished by elevated levels of IL-15 and a marked increase in the rate of intermediate CD14++CD16+ monocytes. CONCLUSION This study revealed that NXG is characterized by impaired macrophage lipid homeostasis associated with a systemic inflammatory profile that may result from the interaction of MIg and lipoproteins.
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Affiliation(s)
- R Szalat
- Département d'immunologie Clinique, Hôpital Saint Louis, Paris, France; EA3963, Université Paris 7 Denis Diderot, INSERM, IFR105, Institut Universitaire d'Hématologie, Paris, France
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6
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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7
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Villard EF, El Khoury P, Duchene E, Bonnefont-Rousselot D, Clement K, Bruckert E, Bittar R, Le Goff W, Guerin M. Elevated CETP Activity Improves Plasma Cholesterol Efflux Capacity From Human Macrophages in Women. Arterioscler Thromb Vasc Biol 2012; 32:2341-9. [DOI: 10.1161/atvbaha.112.252841] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
We aim to identify the impact of endogenous cholesteryl ester transfer protein (CETP) activity on plasma capacity to mediate free cholesterol efflux from human macrophages.
Methods and Results—
Endogenous plasma CETP activity was measured in a population of 348 women. We defined a low CETP group corresponding to subjects displaying an endogenous plasma CETP activity within the first tertile and a high CETP group corresponding to subjects with an endogenous plasma CETP activity within the third tertile. Subjects from the high CETP activity group displayed a significant increase in the capacity of their plasma (+8.2%;
P
=0.001) to mediate cholesterol efflux from human acute monocytic leukemia cell line human macrophages and from ATP-binding cassette transporter A1-dependent pathway (+23.4%;
P
=0.0001) as compared with those from the low CETP activity group. Multivariate analyses revealed that the impact of CETP activity was independent of plasma lipids levels. Pre–β1-high-density lipoprotein concentrations were significantly elevated (+29.6%;
P
=0.01) in the high CETP activity group as compared with the low CETP activity group. A positive correlation between pre–β1-high-density lipoprotein levels and plasma efflux efficiency from human acute monocytic leukemia cell line human macrophages was observed (
r
=0.29,
P
=0.02).
Conclusion—
CETP leading to the improvement of plasma efflux capacity, as a result of efficient pre–β-high-density lipoprotein formation and ATP-binding cassette transporter A1 efflux, should be preserved to prevent lipid accumulation in human macrophages.
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Affiliation(s)
- Elise F. Villard
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Petra El Khoury
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Emilie Duchene
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Dominique Bonnefont-Rousselot
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Karine Clement
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Eric Bruckert
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Randa Bittar
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Wilfried Le Goff
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
| | - Maryse Guerin
- From the INSERM UMRS939, Hôpital de la Pitié, Paris, France (E.F.V., P.E.K., E.B., R.B., W.L.G., M.G.); Université Pierre et Marie Curie–Paris 6, Paris, France (E.F.V., P.E.K., K.C., E.B., R.B., W.L.G., M.G.); Institute of Cardiometabolism and Nutrition, ICAN Paris, France (E.F.V, P.E.K., E.D., D.B.-R., K.C., E.B., R.B., W.L.G., M.G.); Department of Endocrinology (E.D., E.B.), and Department of Metabolic Biochemistry (D.B.-R., R.B.), Assistance Publique-Hôpitaux de Paris, Hôpital de la Pitié, Paris,
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Olivier M, Tanck MW, Out R, Villard EF, Lammers B, Bouchareychas L, Frisdal E, Superville A, Van Berkel T, Kastelein JJ, Eck MV, Jukema JW, Chapman MJ, Dallinga-Thie GM, Guerin M, Le Goff W. Human ATP-binding cassette G1 controls macrophage lipoprotein lipase bioavailability and promotes foam cell formation. Arterioscler Thromb Vasc Biol 2012; 32:2223-31. [PMID: 22772754 DOI: 10.1161/atvbaha.111.243519] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE The physiological function of the ATP-binding cassette G1 (ABCG1) transporter in humans is not yet elucidated, as no genetic disease caused by ABCG1 mutations has been documented. The goal of our study was, therefore, to investigate the potential role(s) of ABCG1 in lipid metabolism in humans. METHODS AND RESULTS Here we report that among the 104 polymorphisms present in the ABCG1 gene, the analysis of the frequent functional rs1893590 and rs1378577 single nucleotide polymorphisms located in the regulatory region of ABCG1 in the Regression Growth Evaluation Statin Study population revealed that both ABCG1 single nucleotide polymorphisms were significantly associated with plasma lipoprotein lipase (LPL) activity. Moreover, we observed that plasma LPL activity was modestly reduced in Abcg1(-/-) mice as compared with control mice. Adipose tissue and skeletal muscle are the major tissues accounting for levels and activity of plasma LPL in the body. However, beyond its lipolytic action in the plasma compartment, LPL was also described to act locally at the cellular level. Thus, macrophage LPL was reported to promote foam cell formation and atherosclerosis in vivo. Analysis of the relationship between ABCG1 and LPL in macrophages revealed that the knockdown of ABCG1 expression (ABCG1 knockdown) in primary cultures of human monocyte-derived macrophages using small interfering RNAs led to a marked reduction of both the secretion and activity of LPL. Indeed, LPL was trapped at the cell surface of ABCG1 knockdown human monocyte-derived macrophages, likely in cholesterol-rich domains, thereby reducing the bioavailability and activity of LPL. As a consequence, LPL-mediated lipid accumulation in human macrophage foam cells in the presence of triglyceride-rich lipoproteins was abolished when ABCG1 expression was repressed. CONCLUSIONS We presently report that ABCG1 controls LPL activity and promotes lipid accumulation in human macrophages in the presence of triglyceride-rich lipoproteins, thereby suggesting a potential deleterious role of macrophage ABCG1 in metabolic situations associated with high levels of circulating triglyceride-rich lipoproteins together with the presence of macrophages in the arterial wall.
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Bellanger N, Julia Z, Villard EF, El Khoury P, Duchene E, Chapman MJ, Fournier N, Le Goff W, Guerin M. Functionality of postprandial larger HDL2 particles is enhanced following CETP inhibition therapy. Atherosclerosis 2012; 221:160-8. [DOI: 10.1016/j.atherosclerosis.2011.12.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 12/09/2011] [Accepted: 12/18/2011] [Indexed: 10/14/2022]
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Orsoni A, Villard EF, Bruckert E, Robillard P, Carrie A, Bonnefont-Rousselot D, Chapman MJ, Dallinga-Thie GM, Le Goff W, Guerin M. Impact of LDL apheresis on atheroprotective reverse cholesterol transport pathway in familial hypercholesterolemia. J Lipid Res 2012; 53:767-75. [PMID: 22338009 DOI: 10.1194/jlr.m024141] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In familial hypercholesterolemia (FH), low HDL cholesterol (HDL-C) levels are associated with functional alterations of HDL particles that reduce their capacity to mediate the reverse cholesterol transport (RCT) pathway. The objective of this study was to evaluate the consequences of LDL apheresis on the efficacy of the RCT pathway in FH patients. LDL apheresis markedly reduced abnormal accelerated cholesteryl ester transfer protein (CETP)-mediated cholesteryl ester (CE) transfer from HDL to LDL, thus reducing their CE content. Equally, we observed a major decrease (-53%; P < 0.0001) in pre-β1-HDL levels. The capacity of whole plasma to mediate free cholesterol efflux from human macrophages was reduced (-15%; P < 0.02) following LDL apheresis. Such reduction resulted from a marked decrease in the ABCA1-dependent efflux (-71%; P < 0.0001) in the scavenger receptor class B type I-dependent efflux (-21%; P < 0.0001) and in the ABCG1-dependent pathway (-15%; P < 0.04). However, HDL particles isolated from FH patients before and after LDL apheresis displayed a similar capacity to mediate cellular free cholesterol efflux or to deliver CE to hepatic cells. We demonstrate that rapid removal of circulating lipoprotein particles by LDL apheresis transitorily reduces RCT. However, LDL apheresis is without impact on the intrinsic ability of HDL particles to promote either cellular free cholesterol efflux from macrophages or to deliver CE to hepatic cells.
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