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Skiba-Cassy S, Collin A, Chartrin P, Médale F, Simon J, Duclos MJ, Tesseraud S. Chicken liver and muscle carnitine palmitoyltransferase 1: nutritional regulation of messengers. Comp Biochem Physiol B Biochem Mol Biol 2007; 147:278-87. [PMID: 17337350 DOI: 10.1016/j.cbpb.2007.01.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 01/18/2007] [Accepted: 01/19/2007] [Indexed: 12/30/2022]
Abstract
In mammals, carnitine palmitoyltransferase 1 (CPT1) is a rate limiting enzyme of fatty acid oxidation. Two isoforms are present. We characterized a full-length cDNA sequence encoding chicken liver L-CPT1 isoform and a partial cDNA sequence encoding chicken muscle M-CPT1 isoform. CPT1 messengers showed the expected tissue specificity. M-CPT1 messenger and CPT1 activity were higher in oxidative than in glycolytic muscle. Expression of both isoforms was assessed in various tissues of genetically fat or lean chickens. Fasting considerably increased L-CPT1 mRNA expression and beta-hydroxyacyl CoA dehydrogenase (HAD) activity in the liver of fat or lean chickens. Unexpectedly, fasting did not increase M-CPT1 mRNA levels nor HAD activity in muscles of either chicken genotype. It however increased succinyl-CoA:3-ketoacid CoA transferase (SCOT) mRNA expression (an enzyme related to ketone body utilization) in oxidative muscle. SCOT messenger was slightly more abundant in oxidative muscle of lean chickens but not in glycolytic muscle. In conclusion, the regulation of fatty acid oxidation is probably not impaired in fat chicken. The absence of fasting stimulation of M-CPT1 mRNA expression, which is at variance with the situation observed in mammals, suggests that during fasting, chicken muscles preferentially use ketone bodies as fuel, at least in the short term.
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Affiliation(s)
- Sandrine Skiba-Cassy
- Station de Recherches Avicoles, Institut National de la Recherche Agronomique, 37380 Nouzilly, France.
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52
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Zang Y, Wang T, Xie W, Wang-Fischer YL, Getty L, Han J, Corkey BE, Guo W. Regulation of acetyl CoA carboxylase and carnitine palmitoyl transferase-1 in rat adipocytes. ACTA ACUST UNITED AC 2005; 13:1530-9. [PMID: 16222055 DOI: 10.1038/oby.2005.188] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Acetyl CoA carboxylase (ACC) is a key enzyme in energy balance. It controls the synthesis of malonyl-CoA, an allosteric inhibitor of carnitine palmitoyltransferase-1 (CPT-I). CPT-I is the gatekeeper of free fatty acid (FFA) oxidation. To test the hypothesis that both enzymes play critical roles in regulation of FFA partitioning in adipocytes, we compared enzyme mRNA expression and specific activity from fed, fasted, and diabetic rats. RESEARCH METHODS AND PROCEDURES Direct effects of nutritional state, insulin, and FFAs on CPT-I and ACC mRNA expression were assessed in adipocytes, liver, and cultured adipose tissue explants. We also determined FFA partitioning in adipocytes from donors exposed to different nutritional conditions. RESULTS CPT-I mRNA and activity decreased in adipocytes but increased in liver in response to fasting. ACC mRNA and activity decreased in both adipocytes and liver during fasting. These changes were not caused directly by fasting-associated changes in plasma insulin and FFA concentrations because insulin suppressed CPT-I mRNA and did not affect ACC mRNA in vitro, whereas exogenous oleate had no effect on either. Despite the decrease in adipocyte CPT-I mRNA and specific activity, CO(2) production from endogenous FFAs increased, suggesting increased FFA transport through CPT-I for beta-oxidation. DISCUSSION Stimulation of FFA transport through CPT-I occurs in both tissues, but CPT-I mRNA and specific activity correlate with FFA transport in liver and not in adipocytes. We conclude that the mechanism responsible for increasing FFA oxidation in adipose tissue during fasting involves mainly allosteric regulation, whereas altered gene expression may play a central role in the liver.
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Affiliation(s)
- Yan Zang
- Obesity Research Center, Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA
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53
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Napal L, Marrero PF, Haro D. An Intronic Peroxisome Proliferator-activated Receptor-binding sequence Mediates Fatty Acid Induction of the Human Carnitine Palmitoyltransferase 1A. J Mol Biol 2005; 354:751-9. [PMID: 16271724 DOI: 10.1016/j.jmb.2005.09.097] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2005] [Revised: 09/27/2005] [Accepted: 09/29/2005] [Indexed: 12/28/2022]
Abstract
The liver plays a central role in the response to fasting. The hormonal profile in this condition, low insulin, and high concentrations of glucagon in plasma, induce the release of large amounts of fatty acids from adipose tissue. Prolonged starvation can therefore induce a dramatic change in the fatty acid oxidative capacity of liver metabolism. Modulation of gene expression by PPARalpha plays a crucial role in this response. While a major role for PPARalpha in the liver is to produce ketone bodies as fuel through beta-oxidation for peripheral tissues during fast, its participation in the control of CPT1A, the rate-limiting step of the pathway, remains controversial. Using Web-based software (VISTA) combining transcription factor binding site database searches with comparative sequence analyses, we have localized a conserved functional PPAR responsive element downstream of the transcriptional start site of the human CPT1A gene. We have shown that this sequence is fundamental for fatty acids or PGC1-induced transcriptional activation of the CPT1A gene. These results corroborate the hypothesis that PPARalpha regulates the limiting step in the oxidation of fatty acids in liver mitochondria.
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Affiliation(s)
- Laura Napal
- Department of Biochemistry and Molecular Biology, School of Pharmacy, University of Barcelona, 08028 Barcelona, Spain
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54
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Abstract
Atherosclerosis of the large arteries is the main origin of cerebro- and cardiovascular diseases, the leading causes of mortality and morbidity in industrialized countries. The pathophysiology of coronary and cerebrovascular atherosclerosis is multifactorial and complex. Fibrates are hypolipidemic drugs that lower progression of atherosclerotic lesions mainly through activation of the nuclear receptor peroxisome-proliferator activated receptor-alpha. In addition, fibrates exert pleiotropic and anti-inflammatory actions. In this chapter, we will focus on the different effects of fibrates impacting on the development of atherosclerosis.
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Affiliation(s)
- R Robillard
- UR545 INSERM, Département d'Athérosclérose, Institut Pasteur, Lille, France
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55
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Song S, Zhang Y, Ma K, Jackson-Hayes L, Lavrentyev EN, Cook GA, Elam MB, Park EA. Peroxisomal proliferator activated receptor gamma coactivator (PGC-1alpha) stimulates carnitine palmitoyltransferase I (CPT-Ialpha) through the first intron. ACTA ACUST UNITED AC 2004; 1679:164-73. [PMID: 15297149 DOI: 10.1016/j.bbaexp.2004.06.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2004] [Revised: 05/17/2004] [Accepted: 06/09/2004] [Indexed: 10/26/2022]
Abstract
Peroxisomal proliferator activated receptor gamma coactivator-1 (PGC-1alpha) is a transcriptional coactivator that promotes mitochondrial biogenesis and energy metabolism in brown fat, skeletal muscle and heart. Previous studies demonstrated that PGC-1alpha is present at low levels in the liver but that the hepatic abundance of PGC-1alpha is elevated in diabetic and fasted animals. Elevated PGC-1alpha expression is associated with increased fatty acid oxidation and hepatic glucose production. Carnitine palmitoyltransferase-I (CPT-I) is a rate controlling step in the mitochondrial oxidation of long chain fatty acids. CPT-I transfers the acyl moiety from fatty acyl-CoA to carnitine for the translocation of long chain fatty acids across the mitochondrial membrane. There are two isoforms of CPT-I including a liver isoform CPT-Ialpha and a muscle isoform CPT-Ibeta. Here, we characterized the regulation of CPT-Ialpha isoform by PGC-1alpha. PGC-1alpha stimulates CPT-Ialpha primarily through multiple sites in the first intron. We found that PGC-1alpha can induce CPT-Ialpha gene expression in cardiac myocytes and primary hepatocytes. Our results indicate that PGC-1alpha elevates the expression of CPT-Ialpha via a unique mechanism that utilizes elements within the intron.
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Affiliation(s)
- Shulan Song
- Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, 874 Union Avenue, Memphis, TN 38163, USA
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56
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Baker VA, Harries HM, Waring JF, Duggan CM, Ni HA, Jolly RA, Yoon LW, De Souza AT, Schmid JE, Brown RH, Ulrich RG, Rockett JC. Clofibrate-induced gene expression changes in rat liver: a cross-laboratory analysis using membrane cDNA arrays. ENVIRONMENTAL HEALTH PERSPECTIVES 2004; 112:428-38. [PMID: 15033592 PMCID: PMC1241896 DOI: 10.1289/ehp.6677] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Microarrays have the potential to significantly impact our ability to identify toxic hazards by the identification of mechanistically relevant markers of toxicity. To be useful for risk assessment, however, microarray data must be challenged to determine reliability and interlaboratory reproducibility. As part of a series of studies conducted by the International Life Sciences Institute Health and Environmental Science Institute Technical Committee on the Application of Genomics to Mechanism-Based Risk Assessment, the biological response in rats to the hepatotoxin clofibrate was investigated. Animals were treated with high (250 mg/kg/day) or low (25 mg/kg/day) doses for 1, 3, or 7 days in two laboratories. Clinical chemistry parameters were measured, livers removed for histopathological assessment, and gene expression analysis was conducted using cDNA arrays. Expression changes in genes involved in fatty acid metabolism (e.g., acyl-CoA oxidase), cell proliferation (e.g., topoisomerase II-Alpha), and fatty acid oxidation (e.g., cytochrome P450 4A1), consistent with the mechanism of clofibrate hepatotoxicity, were detected. Observed differences in gene expression levels correlated with the level of biological response induced in the two in vivo studies. Generally, there was a high level of concordance between the gene expression profiles generated from pooled and individual RNA samples. Quantitative real-time polymerase chain reaction was used to confirm modulations for a number of peroxisome proliferator marker genes. Though the results indicate some variability in the quantitative nature of the microarray data, this appears due largely to differences in experimental and data analysis procedures used within each laboratory. In summary, this study demonstrates the potential for gene expression profiling to identify toxic hazards by the identification of mechanistically relevant markers of toxicity.
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Affiliation(s)
- Valerie A Baker
- Safety and Environmental Assurance Centre, Unilever Research Colworth, Sharnbrook, Bedfordshire, United Kingdom.
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57
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Dubois M, Kerr-Conte J, Gmyr V, Bouckenooghe T, Muharram G, D'Herbomez M, Martin-Ponthieu A, Vantyghem MC, Vandewalle B, Pattou F. Non-esterified fatty acids are deleterious for human pancreatic islet function at physiological glucose concentration. Diabetologia 2004; 47:463-469. [PMID: 14968298 DOI: 10.1007/s00125-004-1347-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2003] [Revised: 12/11/2003] [Indexed: 11/25/2022]
Abstract
AIMS/HYPOTHESIS Whether excess glucose (glucotoxicity) and excess non-esterified fatty acids (lipotoxicity) act synergistically or separately to alter beta-cell function on Type 2 diabetes remains controversial. We examined the influence of non-esterified fatty acids, with or without concomitant increased glucose concentrations, on human islet function and on the expression of genes involved in lipid metabolism. METHODS Human islets isolated from non-diabetic and non-obese donors were cultured with 5.5, 16 or 30 mmol/l glucose, and when appropriate with 1 or 2 mmol/l non-esterified fatty acids. After 48 h, glucose-stimulated insulin secretion, insulin content, triglyceride content and expression of different genes were evaluated. RESULTS Non-esterified fatty acids decreased glucose-stimulated insulin secretion, insulin content and increased triglyceride content of human isolated islets, independently from the deleterious effect of glucose. Increased glucose concentrations also decreased glucose-stimulated insulin secretion and insulin content, but had no influence on triglyceride content. Glucose-stimulated insulin secretion of islets appeared to be significantly correlated with their triglyceride content. Glucose and non-esterified fatty acids modified the gene expression of carnitine palmitoyltransferase-I, acetyl-CoA carboxylase, acyl-CoA oxidase and uncoupling protein 2. CONCLUSION/INTERPRETATION In our model of isolated human islets, increased glucose and non-esterified fatty acids separately reproduced the two major beta-cell alterations observed in vivo, i.e. loss of glucose-stimulated insulin secretion and reduction in islet insulin content. Our results also suggest that this deleterious effect was, at least in part, mediated by modifications in lipid metabolism gene expression.
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Affiliation(s)
- M Dubois
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - J Kerr-Conte
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - V Gmyr
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - T Bouckenooghe
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - G Muharram
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - M D'Herbomez
- Department of Nuclear Medicine, University Hospital Center of Lille, France
| | - A Martin-Ponthieu
- Laboratory of Biochemistry and Molecular Biology, University Hospital Center of Lille, France
| | - M C Vantyghem
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - B Vandewalle
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France
| | - F Pattou
- ERIT-M 0106 (Diabetes Cell therapy), INSERM, Faculty of Medicine, University of Lille, 1 place de Verdun, 59 045, Lille cedex, France.
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58
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Pégorier JP, Le May C. Régulation de l’expression génique par les acides gras. NUTR CLIN METAB 2003. [DOI: 10.1016/s0985-0562(03)00027-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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59
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Barrero MJ, Camarero N, Marrero PF, Haro D. Control of human carnitine palmitoyltransferase II gene transcription by peroxisome proliferator-activated receptor through a partially conserved peroxisome proliferator-responsive element. Biochem J 2003; 369:721-9. [PMID: 12408750 PMCID: PMC1223125 DOI: 10.1042/bj20020851] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2002] [Revised: 10/22/2002] [Accepted: 10/31/2002] [Indexed: 12/29/2022]
Abstract
The expression of several genes involved in fatty acid metabolism is regulated by peroxisome proliferator-activated receptors (PPARs). To gain more insight into the control of carnitine palmitoyltransferase (CPT) gene expression, we examined the transcriptional regulation of the human CPT II gene. We show that the 5'-flanking region of this gene is transcriptionally active and binds PPARalpha in vivo in a chromatin immunoprecipitation assay. In addition, we characterized the peroxisome proliferator-responsive element (PPRE) in the proximal promoter of the CPT II gene, which appears to be a novel PPRE. The sequence of this PPRE contains one half-site which is a perfect consensus sequence (TGACCT) but no clearly recognizable second half-site (CAGCAC); this part of the sequence contains only one match to the consensus, which seems to be irrelevant for the binding of PPARalpha. As expected, other members of the nuclear receptor superfamily also bind to this element and repress the activation mediated by PPARalpha, thus showing that the interplay between several nuclear receptors may regulate the entry of fatty acids into the mitochondria, a crucial step in their metabolism.
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Affiliation(s)
- María J Barrero
- Departament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Avda. Diagonal, 643, E-08028 Barcelona, Spain
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60
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Abstract
Besides their role as energetic molecules, fatty acids (FAs) also act as signals involved in regulating gene expression. This review focuses on a few examples of FA regulation. The hepatic lipogenic enzyme, fatty acid synthase (FAS) is negatively regulated by polyunsaturated FAs (PUFAs) which suppress sterol regulatory element-binding protein 1 (SREBP 1) gene expression and nuclear content in hepatocytes, thereby reducing FAS gene transcription. It was proposed recently that this reduction in SREBP 1 was the result of a PUFA-induced antagonism of ligand-dependent activation of the liver X nuclear receptor (LXR), known to be an inducer of the SREBP 1 gene. In contrast, several genes are turned on by long-chain (LCFAs) and nonmetabolized FAs in a physiologically relevant manner. These include the acyl-CoA oxidase (AOX), the liver carnitine palmitoyltransferase 1 (L-CPT 1) and the liver fatty acid binding protein (L-FABP). While induction of AOX gene transcription appears to be PPARalpha-dependent, that of the L-CPT 1 gene seems disconnected from PPAR activation. Results obtained in preadipocytes and in intestine cells are in support of a key role played by the beta/delta isoform of PPAR in LCFA induction of the FABP gene. Transcription of the phosphoenolpyruvate carboxykinase (PEPCK) gene is stimulated by unsaturated and nonmetabolized LCFAs specifically in adipocytes. Our results reported here support the notion that the mechanisms by which PPARgamma activators and FAs induce transcription of the PEPCK gene are distinct. Altogether these data argue that several FA effects are PPAR-independent. Evidences suggesting that other transcription factors might be involved are debated. It seems now clear that depending upon the cell-specific context and the target gene, FAs can take very different routes to alter transcription.
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Affiliation(s)
- Eric Duplus
- Inserm U530-Université Paris 5, Centre Universitaire U.F.R. Biomédicale, 45 rue des Saints-Pères, 75006 Paris, France
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61
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Wang GL, Moore ML, McMillin JB. A region in the first exon/intron of rat carnitine palmitoyltransferase Ibeta is involved in enhancement of basal transcription. Biochem J 2002; 362:609-18. [PMID: 11879187 PMCID: PMC1222424 DOI: 10.1042/0264-6021:3620609] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Carnitine palmitoyltransferase-Ibeta (CPT-Ibeta) catalyses the transfer of long-chain fatty acids to the enzymes of beta-oxidation of muscle and heart. Transcriptional control of this regulatory protein is relevant to disorders of fatty acid oxidation and the switch to glucose metabolism that occurs in cardiac pathology. The presence of a transcriptional enhancer sequence in the first untranslated exon and first intron of the CPT-Ibeta gene was identified using deletional and mutational analysis, and by ligation of an oleate responsive element (fatty acid response element) to a minimal promoter. The enhancer sequences are contained in the first 40 bases downstream of the transcription start site and increase CPT-Ibeta reporter gene expression independent of any 5' cis-acting elements. Deletion of the first 40 bases of the 3'-untranslated region does not affect the up-regulation of transcription by 10 microM phenylephrine. However, mutation and/or deletion of bases between +11 and +30 dramatically decreases reporter gene expression. Electrophoretic mobility-shift assays reveal two DNA (+11 to +36)-protein complexes that appear cardiac specific. The exon/intron element enhances activation of the heterologous thymidine kinase promoter in a position- and orientation-dependent manner. Therefore we have identified a novel region in the first exon/intron of the CPT-Ibeta gene that acts as a non-classical transcriptional enhancer downstream of regulatory elements characterized previously in the 5'-flanking region of the minimal promoter.
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Affiliation(s)
- Guo-Li Wang
- Department of Pathology and Laboratory Medicine, University of Texas Medical School at Houston, 6431 Fannin, Houston, TX 77030, U.S.A
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Glorian M, Duplus E, Beale EG, Scott DK, Granner DK, Forest C. A single element in the phosphoenolpyruvate carboxykinase gene mediates thiazolidinedione action specifically in adipocytes. Biochimie 2001; 83:933-43. [PMID: 11728630 DOI: 10.1016/s0300-9084(01)01343-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Phosphoenolpyruvate carboxykinase (PEPCK) is the key enzyme in glyceroneogenesis, an important metabolic pathway that functions to restrain the release of non-esterified fatty acids (NEFAs) from adipocytes. The antidiabetic drugs known as thiazolidinediones (TZDs) are thought to achieve some of their benefits by lowering elevated plasma NEFAs. Moreover, peroxisome proliferator activated receptor gamma (PPARgamma) mediates the antidiabetic effects of TZDs, though many TZD responses appear to occur via PPARgamma-independent pathways. PPARgamma is required for adipocyte PEPCK expression, hence PEPCK could be a major target gene for the antidiabetic actions of TZDs. Here we used tissue culture and transfection assays to confirm that the TZD, rosiglitazone, stimulates PEPCK gene transcription specifically in adipocytes. We made the novel observation that this effect was by far the most rapid and robust among several other genes expressed in adipocytes. Adipocytes were transfected with a PEPCK/chloramphenicol acetyltransferase chimeric gene, in which either of the two previously discovered PPARgamma/retinoid X receptor alpha response elements, PCK2 and gAF1/PCK1, had been inactivated by mutagenesis. We demonstrate that PCK2 alone is a bona fide thiazolidinedione response element. We show also that the regulation of PEPCK by PPARs is cell-specific and isotype-specific since rosiglitazone induces PEPCK gene expression selectively in adipocytes, and PPARalpha- and PPARbeta-specific activators are inefficient. Hence, TZDs could lower plasma NEFAs via PPARgamma and PEPCK by enhancing adipocyte glyceroneogenesis.
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Affiliation(s)
- M Glorian
- Inserm Unit 530, Centre Universitaire des Saints-Pères, 45, rue des Saints-Pères, 75006 Paris, France
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63
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Poisson JP, Narce M. Lipid metabolism: peroxisome-proliferator-activated receptors and the regulation of genes of lipid metabolism. Curr Opin Lipidol 2001; 12:583-5. [PMID: 11561178 DOI: 10.1097/00041433-200110000-00015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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