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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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El Bouhassani M, Gilibert S, Moreau M, Saint-Charles F, Tréguier M, Poti F, Chapman MJ, Le Goff W, Lesnik P, Huby T. Cholesteryl ester transfer protein expression partially attenuates the adverse effects of SR-BI receptor deficiency on cholesterol metabolism and atherosclerosis. J Biol Chem 2011; 286:17227-38. [PMID: 21454568 DOI: 10.1074/jbc.m111.220483] [Citation(s) in RCA: 41] [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: 11/06/2022] Open
Abstract
Scavenger receptor SR-BI significantly contributes to HDL cholesterol metabolism and atherogenesis in mice. However, the role of SR-BI may not be as pronounced in humans due to cholesteryl ester transfer protein (CETP) activity. To address the impact of CETP expression on the adverse effects associated with SR-BI deficiency, we cross-bred our SR-BI conditional knock-out mouse model with CETP transgenic mice. CETP almost completely restored the abnormal HDL-C distribution in SR-BI-deficient mice. However, it did not normalize the elevated plasma free to total cholesterol ratio characteristic of hepatic SR-BI deficiency. Red blood cell and platelet count abnormalities observed in mice liver deficient for SR-BI were partially restored by CETP, but the elevated erythrocyte cholesterol to phospholipid ratio remained unchanged. Complete deletion of SR-BI was associated with diminished adrenal cholesterol stores, whereas hepatic SR-BI deficiency resulted in a significant increase in adrenal gland cholesterol content. In both mouse models, CETP had no impact on adrenal cholesterol metabolism. In diet-induced atherosclerosis studies, hepatic SR-BI deficiency accelerated aortic lipid lesion formation in both CETP-expressing (4-fold) and non-CETP-expressing (8-fold) mice when compared with controls. Impaired macrophage to feces reverse cholesterol transport in mice deficient for SR-BI in liver, which was not corrected by CETP, most likely contributed by such an increase in atherosclerosis susceptibility. Finally, comparison of the atherosclerosis burden in SR-BI liver-deficient and fully deficient mice demonstrated that SR-BI exerted an atheroprotective activity in extra-hepatic tissues whether CETP was present or not. These findings support the contention that the SR-BI pathway contributes in unique ways to cholesterol metabolism and atherosclerosis susceptibility even in the presence of CETP.
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Gilibert S, Kwitek AE, Hubner N, Tschannen M, Jacob HJ, Sassard J, Bataillard A. Effects of chromosome 17 on features of the metabolic syndrome in the Lyon hypertensive rat. Physiol Genomics 2008; 33:212-7. [PMID: 18285521 DOI: 10.1152/physiolgenomics.00262.2007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The metabolic syndrome (involving obesity, hypertension, dyslipidemia, insulin resistance, and a proinflammatory/prethrombotic state) is a major risk factor for cardiovascular disease. Its incidence continues to rise, in part because of the epidemic increase in obesity. The Lyon hypertensive (LH) rat is a model for hypertension and several other features of the metabolic syndrome, having high body weight, plasma cholesterol, and triglycerides, increased insulin-to-glucose ratio, and salt-sensitive hypertension. Previous genetic studies in LH/Mav rats and a normotensive control (LN/Mav) identified quantitative trait loci (QTLs) on rat chromosome (RNO)17 for multiple features of the metabolic syndrome. To further evaluate the role of RNO17 in the LH rat, we generated a consomic strain (LH-17(BN)) by substituting LH RNO17 with that of the sequenced Brown Norway (BN/NHsdMcwi) rat. Male LH and BN rats and LH-17(BN) rats were characterized for blood pressure and metabolic and morphological parameters. Similar to the protective effect of LN alleles, the LH-17(BN) rat also showed decreased body weight, triglycerides, and blood pressure; however, there was no significant difference in cholesterol or insulin-to-glucose ratio. Therefore, the substitution of the LH chromosome 17 is sufficient to recapitulate some, but not all, of the traits previously mapped to this chromosome. This could be due to the lack of a susceptible LH genome background or due to the introgression of chromosome 17 from another strain. Regardless, this study provides a single-chromosome genetic model for further dissection of blood pressure and morphological and metabolic traits on this chromosome.
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Affiliation(s)
- S Gilibert
- Département de Physiologie et Pharmacologie Clinique, Institut des Sciences Pharmaceutiques et Biologiques, Université Lyon 1, Lyon, France
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Gilibert S, Sassard J, Bataillard A. [Importance of chromosome 17 in genetically hypertensive rats of the Lyon strain (LH): study of a consomic strain]. Arch Mal Coeur Vaiss 2007; 100:709-713. [PMID: 17928782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Genetically hypertensive rats of the Lyon strain (LH) associate high blood pressure (BP), exaggerated salt-sensitivity, and a metabolic syndrome made of overweight together with increased plasma lipids and insulin/glucose ratio. A genetic mapping study in a large population of F2 rats derived from a cross between hypertensive (LH) and normotensive rats (LN) showed the existence, on chromosome 17, of two clusters of Quantitative Traits Loci (QTLs). The first one was associated to morphological parameters whereas the second influenced blood pressure and plasma lipids level. In order to determine the functional importance of this QTLs, we generated a consomic strain LH-17BN in which the LH chromosome 17 has been fully substituted by a normotensive Brown Norway (BN) one. These LH-17BN, as well as LH and BN male rats of the parental strain were phenotyped. This included radio telemetric measurement of BP during normal and elevated salt intake (1% and then 2% in the drinking water) as well as the determination of morphological, metabolic (triglycerides, cholesterol) and renal (creatinine clearance, proteinuria) parameters. LH-17BN, compared to LH rats, exhibited significant decreases in body weight and blood pressure. Renal functions are improved (decreased of proteinuria). Finally, plasma triglycerides were reduced and reach the level observed in BN rats. In conclusion, the present work demonstrates that, in our model, chromosome 17 contains genes which influence morphology, blood pressure, renal function, and lipid metabolism. Interestingly, chromosome 17 almost completely explains the spontaneous hypertriglyceridemia observed in Lyon Hypertensive rats.
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Affiliation(s)
- S Gilibert
- Université de Lyon I, Faculté de pharmacie, Département de physiologie et pharmacologie clinique, Lyon
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