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Zhou Z, Jiang Q, Zheng Y, Hao C, Ding S, Guo M, Zhao Y, Liu G, Miao S. Proteomics-Based Investigation of Different Live Prey Administered to Freshwater Dark Sleeper ( Odontobutis potamophila): Examining the Effects on Glycolipids and Energy Metabolism. Metabolites 2024; 14:85. [PMID: 38392977 PMCID: PMC10890520 DOI: 10.3390/metabo14020085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/26/2023] [Accepted: 12/28/2023] [Indexed: 02/25/2024] Open
Abstract
Live prey is characterized by balanced rich nutrients and high palatability and is widely used for the seedling cultivation of freshwater dark sleeper (Odontobutis potamophila) larvae. In this study, we evaluated the effects of four groups of paired feeding regimens (group C (Daphnia magna), group L (Limnodrilus hoffmeisteri), group H (Hypophthalmichthys molitrix fry), and group M (mixed groups C, L, and H)) on glycolipid and energy metabolism in O. potamophila larvae. We observed that fatty acid synthase (FAS) and sterol-regulatory-element-binding protein-1 (SREBP-1) mRNA levels were significantly lower in group H when compared to mRNA levels in the other three groups (p < 0.05) and that carnitine palmitoyltransferase 1α (CPT1-α) mRNA levels were significantly lower in group L when compared to group M (p < 0.05). Relative glucokinase (GK) expression levels were significantly lower in group M when compared to the other three groups (p < 0.05). Using proteomics, we analyzed and compared groups H and L and identified 457 differentially expressed proteins (DEPs), of which 151 were significantly up-regulated and 306 were significantly down-regulated. In the comparison of group M with groups C, L, and H, we found significant enrichment in glycolytic processes, the endoplasmic reticulum lumen, NAD binding, intermediate filaments, and nutrient reservoir activity. Our results provide a theoretical guidance for bait selection during larvae cultivation stages in carnivorous fish.
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Affiliation(s)
- Zihan Zhou
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Qichen Jiang
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
- Low-Temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China
| | - You Zheng
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
- Low-Temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China
| | - Chen Hao
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
- Low-Temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China
| | - Shuyan Ding
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
- Low-Temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China
| | - Mengya Guo
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Yunlong Zhao
- School of Life Science, East China Normal University, Shanghai 200241, China
| | - Guoxing Liu
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
- Low-Temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China
| | - Shuyan Miao
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
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2
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Gu T, Duan M, Zhang R, Zeng T, Xu W, Feng W, Jiang C, Tian Y, Chen L, Lu L. Probiotic Fermented Feed Alleviates Liver Fat Deposition in Shaoxing Ducks via Modulating Gut Microbiota. Front Microbiol 2022; 13:928670. [PMID: 35910613 PMCID: PMC9326468 DOI: 10.3389/fmicb.2022.928670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 06/17/2022] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to investigate the effects of different probiotic fermented feed (PFF) on ameliorating liver fat accumulation by modulating the gut microbiota. A total of 216, 120-day-old Shaoxing ducks were divided into three groups, including the control group (basal diet), or the basal diet supplemented with 25 or 35% PFF. The results of the animal experiment showed that supplementation with PFF markedly alleviated the formation of liver and abdominal lipid droplet and decreased the levels of serum triglyceride (TG) in Shaoxing ducks. 16s rDNA showed that PFF could modulate the composition of gut microbiota, in particular, modulating the ratio of Firmicutes to Bacteroidetes. Moreover, PFF restructures the gut microbiome by reducing the abundance of Ruminococcaceae, Lachnospiraceae, and Prevotellaceae in ducks. Additionally, liver transcriptome analysis indicated that the PFF supplementation significantly downregulated the mRNA expression of peroxisome proliferator-activated receptor gamma (PPARG), acyl-CoA desaturase (SCD), DBI, fatty acid synthase (FASN), ELOVL fatty acid elongase 2 (ELOVL2), ELOVL6, and hydroxysteroid 17-beta dehydrogenase (HSD17B12) and upregulated the mRNA expression of CPT1B, which was widely associated with lipid metabolism processes, such as fatty acid elongation, PPAR signaling pathway, and ether lipid metabolism. Correlation analysis indicates that the expression changes of liver metabolism-related genes by PFF are highly correlated with the Ruminococcaceae, Lachnospiraceae, and Prevotellaceae levels. These findings demonstrated that PFF supplementation modulates gut microbial composition to activate liver lipid metabolism-related genes, which results in less lipid deposition in ducks. These findings provide novel insights into the molecular mechanisms of dietary PFF underlying liver fat accumulation by regulating gut microbiota.
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Affiliation(s)
- Tiantian Gu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Science and Veterinary, Zhejiang Academy of Agricultural Science, Hangzhou, China
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Mingcai Duan
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Ruikun Zhang
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Tao Zeng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Science and Veterinary, Zhejiang Academy of Agricultural Science, Hangzhou, China
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Wenwu Xu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Science and Veterinary, Zhejiang Academy of Agricultural Science, Hangzhou, China
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Weifeng Feng
- Jinhua Jinwu Agricultural Development Co., Ltd, Jinhua, China
| | - Chunqing Jiang
- Jinhua Jinwu Agricultural Development Co., Ltd, Jinhua, China
| | - Yong Tian
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Science and Veterinary, Zhejiang Academy of Agricultural Science, Hangzhou, China
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Li Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Science and Veterinary, Zhejiang Academy of Agricultural Science, Hangzhou, China
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Lizhi Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Science and Veterinary, Zhejiang Academy of Agricultural Science, Hangzhou, China
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- *Correspondence: Lizhi Lu
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3
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Oligosaccharide and short-chain fatty acid: a double-edged sword in obese mice by regulating food intake and fat synthesis. Food Res Int 2022; 159:111619. [DOI: 10.1016/j.foodres.2022.111619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 06/19/2022] [Accepted: 07/01/2022] [Indexed: 01/14/2023]
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4
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Xiang L, Niu K, Peng Y, Zhang X, Li X, Ye R, Yu G, Ye G, Xiang H, Song Q, Feng Q. DNA G-quadruplex structure participates in regulation of lipid metabolism through acyl-CoA binding protein. Nucleic Acids Res 2022; 50:6953-6967. [PMID: 35748856 PMCID: PMC9262599 DOI: 10.1093/nar/gkac527] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 12/24/2022] Open
Abstract
G-quadruplex structure (G4) is a type of DNA secondary structure that widely exists in the genomes of many organisms. G4s are believed to participate in multiple biological processes. Acyl-CoA binding protein (ACBP), a ubiquitously expressed and highly conserved protein in eukaryotic cells, plays important roles in lipid metabolism by transporting and protecting acyl-CoA esters. Here, we report the functional identification of a G4 in the promoter of the ACBP gene in silkworm and human cancer cells. We found that G4 exists as a conserved element in the promoters of ACBP genes in invertebrates and vertebrates. The BmACBP G4 bound with G4-binding protein LARK regulated BmACBP transcription, which was blocked by the G4 stabilizer pyridostatin (PDS) and G4 antisense oligonucleotides. PDS treatment with fifth instar silkworm larvae decreased the BmACBP expression and triacylglycerides (TAG) level, resulting in reductions in fat body mass, body size and weight and growth and metamorphic rates. PDS treatment and knocking out of the HsACBP G4 in human hepatic adenocarcinoma HepG2 cells inhibited the expression of HsACBP and decreased the TAG level and cell proliferation. Altogether, our findings suggest that G4 of the ACBP genes is involved in regulation of lipid metabolism processes in invertebrates and vertebrates.
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Affiliation(s)
- Lijun Xiang
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Kangkang Niu
- Correspondence may also be addressed to Kangkang Niu. Tel: +86 20 85215291; Fax: +86 20 85215291;
| | - Yuling Peng
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Xiaojuan Zhang
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Xiaoyu Li
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Ruoqi Ye
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Guoxing Yu
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Guojun Ye
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Hui Xiang
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Qisheng Song
- Division of Plant Sciences and Technology, University of Missouri, Columbia, MO 65211, USA
| | - Qili Feng
- To whom correspondence should be addressed. Tel: +86 20 85215291; Fax: +86 20 85215291;
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5
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Li S, Joseph A, Martins I, Kroemer G. Elevated plasma levels of the appetite-stimulator ACBP/DBI in fasting and obese subjects. Cell Stress 2021; 5:89-98. [PMID: 34308254 PMCID: PMC8283301 DOI: 10.15698/cst2021.07.252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/11/2021] [Accepted: 06/14/2021] [Indexed: 12/12/2022] Open
Abstract
Eukaryotic cells release the phylogenetically ancient protein acyl coenzyme A binding protein (ACBP, which in humans is encoded by the gene DBI, diazepam binding inhibitor) upon nutrient deprivation. Accordingly, mice that are starved for one to two days and humans that undergo voluntary fasting for one to three weeks manifest an increase in the plasma concentration of ACBP/DBI. Paradoxically, ACBP/DBI levels also increase in obese mice and humans. Since ACBP/DBI stimulates appetite, this latter finding may explain why obesity constitutes a self-perpetuating state. Here, we present a theoretical framework to embed these findings in the mechanisms of weight control, as well as a bioinformatics analysis showing that, irrespective of the human cell or tissue type, one single isoform of ACBP/DBI (ACBP1) is preponderant (~90% of all DBI transcripts, with the sole exception of the testis, where it is ~70%). Based on our knowledge, we conclude that ACBP1 is subjected to a biphasic transcriptional and post-transcriptional regulation, explaining why obesity and fasting both are associated with increased circulating ACBP1 protein levels.
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Affiliation(s)
- Sijing Li
- Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Inserm U1138, Université de Paris, Sorbonne Université, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France.,Faculté de Médecine, Université de Paris Saclay, Kremlin Bicêtre, France.,SL and AJ equally contributed to this paper
| | - Adrien Joseph
- Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Inserm U1138, Université de Paris, Sorbonne Université, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France.,Faculté de Médecine, Université de Paris Saclay, Kremlin Bicêtre, France.,SL and AJ equally contributed to this paper
| | - Isabelle Martins
- Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Inserm U1138, Université de Paris, Sorbonne Université, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France
| | - Guido Kroemer
- Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Inserm U1138, Université de Paris, Sorbonne Université, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France.,Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France.,Suzhou Institute for Systems Medicine, Chinese Academy of Medical Sciences, Suzhou, China.,Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden
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6
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Tonon MC, Vaudry H, Chuquet J, Guillebaud F, Fan J, Masmoudi-Kouki O, Vaudry D, Lanfray D, Morin F, Prevot V, Papadopoulos V, Troadec JD, Leprince J. Endozepines and their receptors: Structure, functions and pathophysiological significance. Pharmacol Ther 2020; 208:107386. [DOI: 10.1016/j.pharmthera.2019.06.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/20/2019] [Indexed: 02/06/2023]
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7
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Almeida MGMD, Arêdes DS, Majerowicz D, Færgeman NJ, Knudsen J, Gondim KC. Expression of acyl-CoA-binding protein 5 from Rhodnius prolixus and its inhibition by RNA interference. PLoS One 2020; 15:e0227685. [PMID: 31935250 PMCID: PMC6959561 DOI: 10.1371/journal.pone.0227685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/24/2019] [Indexed: 12/03/2022] Open
Abstract
The acyl-CoA-binding proteins (ACBP) act by regulating the availability of acyl-CoA in the cytoplasm and must have essential functions in lipid metabolism. The genome of the kissing-bug Rhodnius prolixus encodes five proteins of this family, but little is known about them. In this study we investigated the expression and function of RpACBP-5. Feeding induced RpACBP-5 gene expression in the posterior midgut, and an increase of about four times was observed two days after the blood meal. However, the amount of protein, which was only detected in this organ, did not change during digestion. The RpACBP-5 gene was also highly expressed in pre-vitellogenic and vitellogenic oocytes. Recombinant RpACBP-5 was shown to bind to acyl-CoA of different lengths, and it exhibited nanomolar affinity to lauroyl-CoA in an isothermal titration assay, indicating that RpACBP-5 is a functional ACBP. RpACBP-5 knockdown by RNA interference did not affect digestion, egg laying and hatching, survival, or accumulation of triacylglycerol in the fat body and oocytes. Similarly, double knockdown of RpACBP-1 and RpACBP-5 did not alter egg laying and hatching, survival, accumulation of triacylglycerol in the fat body and oocytes, or the neutral lipid composition of the posterior midgut or hemolymph. These results show that RpACBP-5 is a functional ACBP but indicate that the lack of a detectable phenotype in the knockdown insects may be a consequence of functional overlap of the proteins of the ACBP family found in the insect.
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Affiliation(s)
- Muriel G. M. D. Almeida
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Daniela S. Arêdes
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - David Majerowicz
- Institut for Biokemi og Molekylær Biologi, Syddansk Universitet, Odense, Denmark
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nils J. Færgeman
- Institut for Biokemi og Molekylær Biologi, Syddansk Universitet, Odense, Denmark
| | - Jens Knudsen
- Institut for Biokemi og Molekylær Biologi, Syddansk Universitet, Odense, Denmark
| | - Katia C. Gondim
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail:
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8
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Bravo-San Pedro JM, Sica V, Martins I, Pol J, Loos F, Maiuri MC, Durand S, Bossut N, Aprahamian F, Anagnostopoulos G, Niso-Santano M, Aranda F, Ramírez-Pardo I, Lallement J, Denom J, Boedec E, Gorwood P, Ramoz N, Clément K, Pelloux V, Rohia A, Pattou F, Raverdy V, Caiazzo R, Denis RGP, Boya P, Galluzzi L, Madeo F, Migrenne-Li S, Cruciani-Guglielmacci C, Tavernarakis N, López-Otín C, Magnan C, Kroemer G. Acyl-CoA-Binding Protein Is a Lipogenic Factor that Triggers Food Intake and Obesity. Cell Metab 2019; 30:754-767.e9. [PMID: 31422903 DOI: 10.1016/j.cmet.2019.07.010] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/26/2019] [Accepted: 07/19/2019] [Indexed: 12/18/2022]
Abstract
Autophagy facilitates the adaptation to nutritional stress. Here, we show that short-term starvation of cultured cells or mice caused the autophagy-dependent cellular release of acyl-CoA-binding protein (ACBP, also known as diazepam-binding inhibitor, DBI) and consequent ACBP-mediated feedback inhibition of autophagy. Importantly, ACBP levels were elevated in obese patients and reduced in anorexia nervosa. In mice, systemic injection of ACBP protein inhibited autophagy, induced lipogenesis, reduced glycemia, and stimulated appetite as well as weight gain. We designed three approaches to neutralize ACBP, namely, inducible whole-body knockout, systemic administration of neutralizing antibodies, and induction of antiACBP autoantibodies in mice. ACBP neutralization enhanced autophagy, stimulated fatty acid oxidation, inhibited appetite, reduced weight gain in the context of a high-fat diet or leptin deficiency, and accelerated weight loss in response to dietary changes. In conclusion, neutralization of ACBP might constitute a strategy for treating obesity and its co-morbidities.
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Affiliation(s)
- José M Bravo-San Pedro
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Valentina Sica
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Isabelle Martins
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Jonathan Pol
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Friedemann Loos
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Maria Chiara Maiuri
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Sylvère Durand
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Noélie Bossut
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Fanny Aprahamian
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Gerasimos Anagnostopoulos
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France; Faculté de Médecine, Université de Paris Saclay, Kremlin Bicêtre, France
| | - Mireia Niso-Santano
- Biomedical Research Networking Center on Neurodegenerative Diseases (CIBERNED), Department of Biochemistry and Molecular Biology and Genetics, University of Extremadura, Faculty of Nursing and Occupational Therapy, Cáceres, Spain
| | - Fernando Aranda
- Group of Immune receptors of the Innate and Adaptive System, Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Ignacio Ramírez-Pardo
- Department of Cellular and Molecular Biology, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - Justine Lallement
- Université of Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, Paris, France
| | - Jessica Denom
- Université of Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, Paris, France
| | - Erwan Boedec
- INSERM U1149, Center of Research on Inflammation, Paris, France; Paris Diderot University, Sorbonne Paris Cité, Paris, France; National French Center of Scientific Research (CNRS), ERL 8252, Paris, France
| | - Philip Gorwood
- Clinique des Maladies Mentales et de l'Encéphale (CMME), Hôpital Sainte-Anne, Université of Paris, Paris, France; INSERM U894, Centre de Psychiatrie et Neurosciences (CPN), Université of Paris, Paris, France
| | - Nicolas Ramoz
- INSERM U894, Centre de Psychiatrie et Neurosciences (CPN), Université of Paris, Paris, France
| | - Karine Clément
- Sorbonne Université, Inserm, NutriOMics team, Pitié-Salpêtrière Hospital, Paris, France
| | - Veronique Pelloux
- Sorbonne Université, Inserm, NutriOMics team, Pitié-Salpêtrière Hospital, Paris, France
| | - Alili Rohia
- Sorbonne Université, Inserm, NutriOMics team, Pitié-Salpêtrière Hospital, Paris, France
| | - François Pattou
- University of Lille, CHU Lille, Inserm UMR 1190, European Genomic Institute for Diabetes, Lille, France
| | - Violeta Raverdy
- University of Lille, CHU Lille, Inserm UMR 1190, European Genomic Institute for Diabetes, Lille, France
| | - Robert Caiazzo
- University of Lille, CHU Lille, Inserm UMR 1190, European Genomic Institute for Diabetes, Lille, France
| | - Raphaël G P Denis
- Université of Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, Paris, France
| | - Patricia Boya
- Department of Cellular and Molecular Biology, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - Lorenzo Galluzzi
- Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA; Sandra and Edward Meyer Cancer Center, New York, NY, USA; Department of Dermatology, Yale School of Medicine, New Haven, CT, USA
| | - Frank Madeo
- BioTechMed, Graz, Austria; Institute of Molecular Biosciences, NAWI Graz, University of Graz, Humboldtstrasse, Graz, Austria
| | - Stéphanie Migrenne-Li
- Université of Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, Paris, France
| | | | - Nektarios Tavernarakis
- Department of Basic Sciences, Faculty of Medicine, University of Crete, Heraklion, Crete, Greece; Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Hellas, Nikolaou Plastira 100, Heraklion, Crete, Greece
| | - Carlos López-Otín
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Oncología (IUOPA), Universidad de Oviedo, Oviedo, Spain
| | - Christophe Magnan
- Université of Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, Paris, France
| | - Guido Kroemer
- INSERM U1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; Team "Metabolism, Cancer & Immunity", Équipe 11 labellisée par la Ligue contre le Cancer, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France; Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France; Suzhou Institute for Systems Medicine, Chinese Academy of Sciences, Suzhou, China; Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden.
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9
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Kochansky CJ, Lyman MJ, Fauty SE, Vlasakova K, D'mello AP. Administration of Fenofibrate Markedly Elevates Fabp3 in Rat Liver and Plasma and Confounds Its Use as a Preclinical Biomarker of Cardiac and Muscle Toxicity. Lipids 2018; 53:947-960. [PMID: 30592062 DOI: 10.1002/lipd.12110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 10/25/2018] [Accepted: 11/07/2018] [Indexed: 02/05/2023]
Abstract
Proteins involved in lipid homeostasis are often regulated through the nuclear peroxisome proliferator-activated receptors (PPAR). PPARα is the target for the fibrate-class of drugs. Fenofibrate has been approved for its lipid-lowering effects in patients with hypercholesterolemia and hypertriglyceridemia. We were interested in understanding the expression of the energy transporters in energy-utilizing tissues like liver, heart, muscle, and adipose tissues in rat with the hypothesis that the change in transporter expression would align with the known lipid-lowering effects of PPARα agonists like fenofibrate. We found that several fatty-acid transporter proteins had significantly altered levels following 8 days of fenofibrate dosing. The mRNA levels of the highly abundant Fatp2 and Fatp5 in rat liver increased approximately twofold and decreased fourfold, respectively. Several fatty-acid-binding proteins and acyl-CoA-binding proteins had a significant increase in mRNA abundance but not the major liver fatty-acid-binding protein, Fabp1. Of particular interest was the increased liver expression of Fabp3 also known as heart-fatty acid binding protein (H-FABP or FABP3). FABP3 has been proposed as a circulating clinical biomarker for cardiomyopathy and muscle toxicity, as well as a preclinical marker for PPARα-induced muscle toxicity. Here, we show that fenofibrate induces liver mRNA levels of Fabp3 ~5000-fold resulting in an approximately 50-fold increase in FABP3 protein levels in the whole liver. This increased liver expression complicates the interpretation and potential use of FABP3 as a specific biomarker for PPARα-induced muscle toxicities.
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Affiliation(s)
- Christopher J Kochansky
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, Merck & Co., Inc., 770 Sumneytown Pike, WP75A-203A, West Point, PA, 19486, USA.,Department of Pharmaceutical Sciences, University of the Sciences in Philadelphia, 600 South 43rd Street, Philadelphia, PA, 19104-4495, USA
| | - Michael J Lyman
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, Merck & Co., Inc., 770 Sumneytown Pike, WP75A-203A, West Point, PA, 19486, USA
| | - Scott E Fauty
- Safety Assessment, Merck & Co., Inc., 770 Sumneytown Pike, WP81-217, West Point, PA, 19486, USA
| | - Katerina Vlasakova
- Safety Assessment, Merck & Co., Inc., 770 Sumneytown Pike, WP81-217, West Point, PA, 19486, USA
| | - Anil P D'mello
- Department of Pharmaceutical Sciences, University of the Sciences in Philadelphia, 600 South 43rd Street, Philadelphia, PA, 19104-4495, USA
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10
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Lung SC, Liao P, Yeung EC, Hsiao AS, Xue Y, Chye ML. Arabidopsis ACYL-COA-BINDING PROTEIN1 interacts with STEROL C4-METHYL OXIDASE1-2 to modulate gene expression of homeodomain-leucine zipper IV transcription factors. THE NEW PHYTOLOGIST 2018; 218:183-200. [PMID: 29288621 DOI: 10.1111/nph.14965] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 11/20/2017] [Indexed: 05/18/2023]
Abstract
Fatty acids (FAs) and sterols constitute building blocks of eukaryotic membranes and lipid signals. Co-regulation of FA and sterol synthesis is mediated by sterol regulatory element-binding proteins in animals but remains elusive in plants. We reported recently that Arabidopsis ACYL-COA-BINDING PROTEIN1 (ACBP1) modulates sterol synthesis via protein-protein interaction with STEROL C4-METHYL OXIDASE1-1 (SMO1-1). Herein, ACBP1 was demonstrated to co-express and interact with SMO1-2 by yeast two-hybrid, co-localization, pull-down, co-immunoprecipitation and β-glucuronidase assays. SMO1-2 silenced in acbp1 was used in phenotyping, GC-MS and expression profiling. ACBP1 co-expressed with SMO1-2 in embryo sacs, pollen and trichomes, corroborating with cooperative tissue-specific functions unseen with SMO1-1. SMO1-2 silencing in acbp1 impaired seed development, male and female gamete transmission, and pollen function. Genes encoding homeodomain-leucine zipper IV transcription factors (HDG5, HDG10, HDG11 and GLABRA2), which potentially bind phospholipids/sterols, were transcribed aberrantly. GLABRA2 targets (MYB23, MUM4 and PLDα1) were misregulated, causing glabra2-resembling trichome, seed coat mucilage and oil-accumulating phenotypes. Together with altered sterol and FA compositions upon ACBP1 mutation and/or SMO1-2 silencing, ACBP1-SMO1 interaction appears to mediate homeostatic co-regulation of FAs and sterols, which serve as lipid modulators for gene expression of homeodomain-leucine zipper IV transcription factors.
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Affiliation(s)
- Shiu-Cheung Lung
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Pan Liao
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Edward C Yeung
- Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - An-Shan Hsiao
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Yan Xue
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Mee-Len Chye
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
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11
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Gallego SF, Sprenger RR, Neess D, Pauling JK, Færgeman NJ, Ejsing CS. Quantitative lipidomics reveals age-dependent perturbations of whole-body lipid metabolism in ACBP deficient mice. Biochim Biophys Acta Mol Cell Biol Lipids 2017; 1862:145-155. [DOI: 10.1016/j.bbalip.2016.10.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 10/06/2016] [Accepted: 10/28/2016] [Indexed: 01/08/2023]
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12
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Targeting mitochondrial energy metabolism with TSPO ligands. Biochem Soc Trans 2015; 43:537-42. [PMID: 26551690 DOI: 10.1042/bst20150019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Indexed: 02/07/2023]
Abstract
The translocator protein (18 kDa) (TSPO) resides on the outer mitochondrial membrane where it is believed to participate in cholesterol transport and steroid hormone synthesis. Although it is almost ubiquitously expressed, what TSPO does in non-steroidogenic tissues is largely unexplored. Recent studies report changes in glucose homoeostasis and cellular energy production when TSPO function is modulated by selective ligands or by genetic loss-of-function. This review summarizes findings that connect TSPO function with the regulation of mitochondrial energy metabolism. The juxtaposition of TSPO at the cytosolic/mitochondrial interface and the existence of endogenous ligands that are regulated by metabolism suggest that TSPO functions to adapt mitochondrial to cellular metabolism. From a pharmacological perspective the specific up-regulation of TSPO in neuro-inflammatory and injury-induced conditions make TSPO an interesting, druggable target of mitochondrial metabolism.
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13
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Bek S, Neess D, Dixen K, Bloksgaard M, Marcher AB, Chemnitz J, Færgeman NJ, Mandrup S. Compromised epidermal barrier stimulates Harderian gland activity and hypertrophy in ACBP-/- mice. J Lipid Res 2015; 56:1738-46. [PMID: 26142722 DOI: 10.1194/jlr.m060780] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Indexed: 11/20/2022] Open
Abstract
Acyl-CoA binding protein (ACBP) is a small, ubiquitously expressed intracellular protein that binds C14-C22 acyl-CoA esters with very high affinity and specificity. We have recently shown that targeted disruption of the Acbp gene leads to a compromised epidermal barrier and that this causes delayed adaptation to weaning, including the induction of the hepatic lipogenic and cholesterogenic gene programs. Here we show that ACBP is highly expressed in the Harderian gland, a gland that is located behind the eyeball of rodents and involved in the production of fur lipids and lipids used for lubrication of the eye lid. We show that disruption of the Acbp gene leads to a significant enlargement of this gland with hypertrophy of the acinar cells and increased de novo synthesis of monoalkyl diacylglycerol, the main lipid species produced by the gland. Mice with conditional targeting of the Acbp gene in the epidermis recapitulate this phenotype, whereas generation of an artificial epidermal barrier during gland development reverses the phenotype. Our findings indicate that the Harderian gland is activated by the compromised epidermal barrier as an adaptive and protective mechanism to overcome the barrier defect.
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Affiliation(s)
- Signe Bek
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Ditte Neess
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Karen Dixen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Maria Bloksgaard
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Ann-Britt Marcher
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - John Chemnitz
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Nils J Færgeman
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Susanne Mandrup
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
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14
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Neess D, Bek S, Engelsby H, Gallego SF, Færgeman NJ. Long-chain acyl-CoA esters in metabolism and signaling: Role of acyl-CoA binding proteins. Prog Lipid Res 2015; 59:1-25. [PMID: 25898985 DOI: 10.1016/j.plipres.2015.04.001] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/11/2015] [Accepted: 04/09/2015] [Indexed: 02/03/2023]
Abstract
Long-chain fatty acyl-CoA esters are key intermediates in numerous lipid metabolic pathways, and recognized as important cellular signaling molecules. The intracellular flux and regulatory properties of acyl-CoA esters have been proposed to be coordinated by acyl-CoA-binding domain containing proteins (ACBDs). The ACBDs, which comprise a highly conserved multigene family of intracellular lipid-binding proteins, are found in all eukaryotes and ubiquitously expressed in all metazoan tissues, with distinct expression patterns for individual ACBDs. The ACBDs are involved in numerous intracellular processes including fatty acid-, glycerolipid- and glycerophospholipid biosynthesis, β-oxidation, cellular differentiation and proliferation as well as in the regulation of numerous enzyme activities. Little is known about the specific roles of the ACBDs in the regulation of these processes, however, recent studies have gained further insights into their in vivo functions and provided further evidence for ACBD-specific functions in cellular signaling and lipid metabolic pathways. This review summarizes the structural and functional properties of the various ACBDs, with special emphasis on the function of ACBD1, commonly known as ACBP.
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Affiliation(s)
- Ditte Neess
- Villum Center for Bioanalytical Sciences, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Signe Bek
- Villum Center for Bioanalytical Sciences, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Hanne Engelsby
- Villum Center for Bioanalytical Sciences, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Sandra F Gallego
- Villum Center for Bioanalytical Sciences, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Nils J Færgeman
- Villum Center for Bioanalytical Sciences, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark.
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15
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Bloksgaard M, Neess D, Færgeman NJ, Mandrup S. Acyl-CoA binding protein and epidermal barrier function. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:369-76. [DOI: 10.1016/j.bbalip.2013.09.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/20/2013] [Accepted: 09/23/2013] [Indexed: 11/29/2022]
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16
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Delayed Hepatic Adaptation to Weaning in ACBP−/− Mice Is Caused by Disruption of the Epidermal Barrier. Cell Rep 2013; 5:1403-12. [DOI: 10.1016/j.celrep.2013.11.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 10/24/2013] [Accepted: 11/04/2013] [Indexed: 11/24/2022] Open
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17
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Langaa S, Bloksgaard M, Bek S, Neess D, Nørregaard R, Hansen PBL, Marcher AB, Frøkiær J, Mandrup S, Jensen BL. Mice with targeted disruption of the acyl-CoA binding protein display attenuated urine concentrating ability and diminished renal aquaporin-3 abundance. Am J Physiol Renal Physiol 2012; 302:F1034-44. [DOI: 10.1152/ajprenal.00371.2011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The acyl-CoA binding protein (ACBP) is a small intracellular protein that specifically binds and transports medium to long-chain acyl-CoA esters. Previous studies have shown that ACBP is ubiquitously expressed but found at particularly high levels in lipogenic cell types as well as in many epithelial cells. Here we show that ACBP is widely expressed in human and mouse kidney epithelium, with the highest expression in the proximal convoluted tubules. To elucidate the role of ACBP in the renal epithelium, mice with targeted disruption of the ACBP gene (ACBP−/−) were used to study water and NaCl balance as well as urine concentrating ability in metabolic cages. Food intake and urinary excretion of Na+ and K+ did not differ between ACBP−/− and +/+ mice. Interestingly, however, water intake and diuresis were significantly higher at baseline in ACBP−/− mice compared with that of +/+ mice. Subsequent to 20-h water deprivation, ACBP−/− mice exhibited increased diuresis, reduced urine osmolality, elevated hematocrit, and higher relative weight loss compared with +/+ mice. There were no significant differences in plasma concentrations of renin, corticosterone, and aldosterone between mice of the two genotypes. After water deprivation, renal medullary interstitial fluid osmolality and concentrations of Na+, K+, and urea did not differ between genotypes and cAMP excretion was similar. Renal aquaporin-1 (AQP1), -2, and -4 protein abundances did not differ between water-deprived +/+ and ACBP−/− mice; however, ACBP−/− mice displayed increased apical targeting of pS256-AQP2. AQP3 abundance was lower in ACBP−/− mice than in +/+ control animals. Thus we conclude that ACBP is necessary for intact urine concentrating ability. Our data suggest that the deficiency in urine concentrating ability in the ACBP−/− may be caused by reduced AQP3, leading to impaired efflux over the basolateral membrane of the collecting duct.
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Affiliation(s)
- Stine Langaa
- Departments of 1Cardiovascular and Renal Research and
| | - Maria Bloksgaard
- Biochemistry and Molecular Biology, University of Southern Denmark, Odense; and
| | - Signe Bek
- Biochemistry and Molecular Biology, University of Southern Denmark, Odense; and
| | - Ditte Neess
- Biochemistry and Molecular Biology, University of Southern Denmark, Odense; and
| | - Rikke Nørregaard
- The Water and Salt Research Center, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | | | - Ann Britt Marcher
- Biochemistry and Molecular Biology, University of Southern Denmark, Odense; and
| | - Jørgen Frøkiær
- The Water and Salt Research Center, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Susanne Mandrup
- Biochemistry and Molecular Biology, University of Southern Denmark, Odense; and
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18
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Sarkanen JR, Kaila V, Mannerström B, Räty S, Kuokkanen H, Miettinen S, Ylikomi T. Human Adipose Tissue Extract Induces Angiogenesis and AdipogenesisIn Vitro. Tissue Eng Part A 2012; 18:17-25. [DOI: 10.1089/ten.tea.2010.0712] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Jertta-Riina Sarkanen
- Department of Cell Biology, Medical School, University of Tampere, Tampere, Finland
- FICAM, Finnish Center for Alternative Methods, Medical School, University of Tampere, Tampere, Finland
- Science Center, Tampere University Hospital, Tampere, Finland
| | - Ville Kaila
- Department of Cell Biology, Medical School, University of Tampere, Tampere, Finland
| | - Bettina Mannerström
- Science Center, Tampere University Hospital, Tampere, Finland
- Adult Stem Cells, Institute of Biomedical Technology, University of Tampere, Tampere, Finland
- BioMediTech, Tampere, Finland
| | - Sari Räty
- Department of Gastroenterology and Alimentary Tract Surgery, Tampere University Hospital, Tampere, Finland
| | - Hannu Kuokkanen
- Department of Plastic Surgery, Tampere University Hospital, Tampere, Finland
| | - Susanna Miettinen
- Science Center, Tampere University Hospital, Tampere, Finland
- Adult Stem Cells, Institute of Biomedical Technology, University of Tampere, Tampere, Finland
- BioMediTech, Tampere, Finland
| | - Timo Ylikomi
- Department of Cell Biology, Medical School, University of Tampere, Tampere, Finland
- FICAM, Finnish Center for Alternative Methods, Medical School, University of Tampere, Tampere, Finland
- Department of Clinical Chemistry, Tampere University Hospital, Tampere, Finland
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19
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Nitz I, Kruse ML, Klapper M, Döring F. Specific regulation of low-abundance transcript variants encoding human Acyl-CoA binding protein (ACBP) isoforms. J Cell Mol Med 2011; 15:909-27. [PMID: 20345851 PMCID: PMC3922676 DOI: 10.1111/j.1582-4934.2010.01055.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Despite intensive efforts on annotation of eukaryotic transcriptoms, little is known about the regulation of low-abundance transcripts. To address this question, we analysed the regulation of novel low-abundance transcript variants of human acyl-CoA binding protein (ACBP), an important multifunctional housekeeping protein, which we have identified by screening of human expressed sequence tags in combination with ab initio gene prediction. By using RT-, real-time RT- and rapid amplification of cDNA ends-PCR in five human tissues, we find these transcripts, which are generated by a consequent use of alternative promoters and alternate first or first two exons, to be authentic ones. They show a tissue-specific distribution and intrinsic responsiveness to glucose and insulin. Promoter analyses of the corresponding transcripts revealed a differential regulation mediated by sterol regulatory element-binding protein-2, hepatocyte nuclear factor-4α and nuclear factor κB (NF-κB), central transcription factors of fat and glucose metabolism and inflammation. Subcellular localization studies of deduced isoforms in liver HepG2 cells showed that they are distributed in different compartments. By demonstrating that ACBP is a target of NF-κB, our findings link fatty acid metabolism with inflammation. Furthermore, our findings show that low-abundance transcripts are regulated in a similar mode than their high-abundance counterparts.
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Affiliation(s)
- Inke Nitz
- Institute of Human Nutrition and Food Science, Department of Molecular Prevention, Christian-Albrechts University, Kiel, Germany
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20
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Rahman SMJ, Gonzalez AL, Li M, Seeley EH, Zimmerman LJ, Zhang XJ, Manier ML, Olson SJ, Shah RN, Miller AN, Putnam JB, Miller YE, Franklin WA, Blot WJ, Carbone DP, Shyr Y, Caprioli RM, Massion PP. Lung cancer diagnosis from proteomic analysis of preinvasive lesions. Cancer Res 2011; 71:3009-17. [PMID: 21487035 PMCID: PMC3110721 DOI: 10.1158/0008-5472.can-10-2510] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Early detection may help improve survival from lung cancer. In this study, our goal was to derive and validate a signature from the proteomic analysis of bronchial lesions that could predict the diagnosis of lung cancer. Using previously published studies of bronchial tissues, we selected a signature of nine matrix-assisted laser desorption ionization mass spectrometry (MALDI MS) mass-to-charge ratio features to build a prediction model diagnostic of lung cancer. The model was based on MALDI MS signal intensity (MALDI score) from bronchial tissue specimens from our 2005 published cohort of 51 patients. The performance of the prediction model in identifying lung cancer was tested in an independent cohort of bronchial specimens from 60 patients. The probability of having lung cancer based on the proteomic analysis of the bronchial specimens was characterized by an area under the receiver operating characteristic curve of 0.77 (95% CI 0.66-0.88) in this validation cohort. Eight of the nine features were identified and validated by Western blotting and immunohistochemistry. These results show that proteomic analysis of endobronchial lesions may facilitate the diagnosis of lung cancer and the monitoring of high-risk individuals for lung cancer in surveillance and chemoprevention trials.
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Affiliation(s)
- S M Jamshedur Rahman
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-6838, USA
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21
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Neess D, Bloksgaard M, Bek S, Marcher AB, Elle IC, Helledie T, Due M, Pagmantidis V, Finsen B, Wilbertz J, Kruhøffer M, Færgeman N, Mandrup S. Disruption of the acyl-CoA-binding protein gene delays hepatic adaptation to metabolic changes at weaning. J Biol Chem 2010; 286:3460-72. [PMID: 21106527 DOI: 10.1074/jbc.m110.161109] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The acyl-CoA-binding protein (ACBP)/diazepam binding inhibitor is an intracellular protein that binds C(14)-C(22) acyl-CoA esters and is thought to act as an acyl-CoA transporter. In vitro analyses have indicated that ACBP can transport acyl-CoA esters between different enzymatic systems; however, little is known about the in vivo function in mammalian cells. We have generated mice with targeted disruption of ACBP (ACBP(-/-)). These mice are viable and fertile and develop normally. However, around weaning, the ACBP(-/-) mice go through a crisis with overall weakness and a slightly decreased growth rate. Using microarray analysis, we show that the liver of ACBP(-/-) mice displays a significantly delayed adaptation to weaning with late induction of target genes of the sterol regulatory element-binding protein (SREBP) family. As a result, hepatic de novo cholesterogenesis is decreased at weaning. The delayed induction of SREBP target genes around weaning is caused by a compromised processing and decreased expression of SREBP precursors, leading to reduced binding of SREBP to target sites in chromatin. In conclusion, lack of ACBP interferes with the normal metabolic adaptation to weaning and leads to delayed induction of the lipogenic gene program in the liver.
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Affiliation(s)
- Ditte Neess
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark
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22
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Yurchenko OP, Weselake RJ. Involvement of low molecular mass soluble acyl-CoA-binding protein in seed oil biosynthesis. N Biotechnol 2010; 28:97-109. [PMID: 20933624 DOI: 10.1016/j.nbt.2010.09.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2010] [Revised: 09/11/2010] [Accepted: 09/29/2010] [Indexed: 01/03/2023]
Abstract
Acyl-CoA-binding protein (ACBP), a low molecular mass (m) (∼ 10 kDa) soluble protein ubiquitous in eukaryotes, plays an important housekeeping role in lipid metabolism by maintaining the intracellular acyl-CoA pool. ACBP is involved in lipid biosynthesis and transport, gene expression, and membrane biogenesis. In plants, low m ACBP and high m ACBPs participate in response mechanisms to biotic and abiotic factors, acyl-CoA transport in phloem, and biosynthesis of structural and storage lipids. In light of current research on the modification of seed oil, insight into mechanisms of substrate trafficking within lipid biosynthetic pathways is crucial for developing rational strategies for the production of specialty oils with the desired alterations in fatty acid composition. In this review, we summarize our knowledge of plant ACBPs with emphasis on the role of low m ACBP in seed oil biosynthesis, based on in vitro studies and analyses of transgenic plants. Future prospects and possible applications of low m ACBP in seed oil modification are discussed.
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Affiliation(s)
- Olga P Yurchenko
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-10 Agriculture/Forestry Centre, Edmonton, Alberta, Canada
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23
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Landrock D, Atshaves BP, McIntosh AL, Landrock KK, Schroeder F, Kier AB. Acyl-CoA binding protein gene ablation induces pre-implantation embryonic lethality in mice. Lipids 2010; 45:567-80. [PMID: 20559753 PMCID: PMC2997683 DOI: 10.1007/s11745-010-3437-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Accepted: 05/29/2010] [Indexed: 11/26/2022]
Abstract
Unique among the intracellular lipid binding proteins, acyl-CoA binding protein (ACBP) exclusively binds long-chain fatty acyl-CoAs (LCFA-CoAs). To test if ACBP is an essential protein in mammals, the ACBP gene was ablated by homologous recombination in mice. While ACBP heterozygotes appeared phenotypically normal, intercrossing of the heterozygotes did not produce any live homozygous deficient (null) ACBP((-/-)) pups. Heterozygous and wild type embryos were detected at all post-implantation stages, but no homozygous ACBP-null embryos were obtained-suggesting that an embryonic lethality occurred at a pre-implantation stage of development, or that embryos never formed. While ACBP-null embryos were not detected at any blastocyst stage, ACBP-null embryos were detected at the morula (8-cell), cleavage (2-cell), and zygote (1-cell) pre-implantation stages. Two other LCFA-CoA binding proteins, sterol carrier protein-2 (SCP-2) and sterol carrier protein-x (SCP-x) were significantly upregulated at these stages. These findings demonstrate for the first time that ACBP is an essential protein required for embryonic development and its loss of function may be initially compensated by concomitant upregulation of two other LCFA-CoA binding proteins, but only at the earliest pre-implantation stages. The fact that ACBP is the first known intracellular lipid binding protein whose deletion results in embryonic lethality suggests its vital importance in mammals.
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Affiliation(s)
- Danilo Landrock
- Department of Pathobiology, Texas A&M University, TAMU 4467, College Station, TX 77843-4467, USA
| | - Barbara P. Atshaves
- Department of Physiology and Pharmacology, Texas A&M University, TAMU 4466, College Station, TX 77843-4466, USA
| | - Avery L. McIntosh
- Department of Physiology and Pharmacology, Texas A&M University, TAMU 4466, College Station, TX 77843-4466, USA
| | - Kerstin K. Landrock
- Department of Physiology and Pharmacology, Texas A&M University, TAMU 4466, College Station, TX 77843-4466, USA
| | - Friedhelm Schroeder
- Department of Physiology and Pharmacology, Texas A&M University, TAMU 4466, College Station, TX 77843-4466, USA
| | - Ann B. Kier
- Department of Pathobiology, Texas A&M University, TAMU 4467, College Station, TX 77843-4467, USA
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Alves-Bezerra M, Majerowicz D, Grillo LAM, Tremonte H, Almeida CB, Braz GRC, Sola-Penna M, Paiva-Silva GO, Gondim KC. Serotonin regulates an acyl-CoA-binding protein (ACBP) gene expression in the midgut of Rhodnius prolixus. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2010; 40:119-125. [PMID: 20079838 DOI: 10.1016/j.ibmb.2010.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Revised: 12/16/2009] [Accepted: 01/06/2010] [Indexed: 05/28/2023]
Abstract
Acyl-CoA esters have many intracellular functions, acting as energy source, substrate for metabolic processes and taking part in cell signaling. The acyl-CoA-binding protein (ACBP), a highly conserved 10 kDa intracellular protein, binds long- and medium-chain acyl-CoA esters with very high affinity, directing them to specific metabolic routes and protecting them from hydrolysis. An ACBP gene sequence was identified in the genome of Rhodnius prolixus. This ACBP gene (RpACBP-1) was expressed in all analyzed tissues and quantitative PCR showed that expression was highest in posterior midgut. In this tissue, ACBP gene expression increased in the first day after blood meal ( approximately 10-fold) and then decreased to unfed levels in the seventh day after meal. Injection of serotonin (5-hydroxytryptamine; 5-HT), a neuroamine released in the hemolymph after the start of feeding, increased the expression of this gene in the midgut of unfed females, reaching levels similar to those observed in fed insects. This effect of injected 5-HT was inhibited by spiperone, an antagonist of 5-HT mammalian receptors, that was also able to block the physiological increase in RpACBP-1 expression observed after feeding. Injection of cholera toxin or dibutyryl-cAMP also resulted in the stimulation of this gene expression. These data reveal a transcriptional regulatory mechanism in R. prolixus, that is triggered by 5-HT. In this way, a novel role for 5-HT is proposed, as a regulator of ACBP gene expression and, consequently, taking part in the control of lipid metabolism.
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25
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Yoon JH, Yea K, Kim J, Choi YS, Park S, Lee H, Lee CS, Suh PG, Ryu SH. Comparative proteomic analysis of the insulin-induced L6 myotube secretome. Proteomics 2009; 9:51-60. [PMID: 19053084 DOI: 10.1002/pmic.200800187] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Emerging evidence has revealed an endocrine function for skeletal muscle; in fact, certain anti-inflammatory cytokines are secreted only from contractile skeletal muscle. However, the skeletal muscle secretome as a whole is poorly characterized, as is how it changes in response to extracellular stimuli. Herein, we sought to identify and characterize the members of the skeletal muscle secretome, and to determine which protein secretion levels were modulated in response to insulin stimulation. To conduct these studies, we treated differentiated L6 rat skeletal muscle cells with insulin or left them untreated, and we comparatively analyzed the proteins secreted into the media. We fractionated this conditioned media using offline RP HPLC, digested the fractionated proteins, and analyzed the resulting peptides with LC-ESI-MS/MS. We identified a total of 254 proteins, and by using three different filtering methods, we identified 153 of these as secretory proteins. Fourteen proteins were secreted at higher levels under insulin stimulation, including several proteins known to be highly secreted in metabolic diseases; 19 proteins were secreted at lower levels under insulin stimulation. These result not only pinpointed several previously unknown, insulin induced, secretory proteins of skeletal muscle, it also described a novel approach for conditioned secretome analysis.
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Affiliation(s)
- Jong Hyuk Yoon
- Division of Molecular and Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
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26
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Downregulation of PPARs and SREBP by acyl-CoA-binding protein overexpression in transgenic rats. Pflugers Arch 2007; 456:369-77. [DOI: 10.1007/s00424-007-0416-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2007] [Revised: 11/26/2007] [Accepted: 11/29/2007] [Indexed: 10/22/2022]
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Structural and functional characterization of a new recombinant histidine-tagged acyl coenzyme A binding protein (ACBP) from mouse. Protein Expr Purif 2007; 58:184-93. [PMID: 18178100 DOI: 10.1016/j.pep.2007.11.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Revised: 11/19/2007] [Accepted: 11/20/2007] [Indexed: 10/22/2022]
Abstract
Acyl coenzyme A binding protein (ACBP) has been proposed to transport fatty acyl CoAs intracellularly, facilitating their metabolism. In this study, a new mouse recombinant ACBP was produced by insertion of a histidine (his) tag at the C-terminus to allow efficient purification by Ni-affinity chromatography. The his-tag was inserted at the C-terminus since ACBP is a small molecular size (10 kDa) protein whose structure and activity are sensitive to amino acid substitutions in the N-terminus. The his-tag had no or little effect on ACBP structure or ligand binding affinity and specificity. His-ACBP bound the naturally occurring fluorescent cis-parinaroyl-CoA with very high affinity (K(d)=2.15 nM), but exhibited no affinity for non-esterified cis-parinaric acid. To determine if the presence of the C-terminal his-tag altered ACBP interactions with other proteins, direct binding to hepatocyte nuclear factor-4alpha (HNF-4alpha), a nuclear receptor regulating transcription of genes involved in lipid metabolism, was examined. His-ACBP and HNF-4alpha were labeled with Cy5 and Cy3, respectively, and direct interaction was determined by a novel fluorescence resonance energy transfer (FRET) binding assay. FRET analysis showed that his-ACBP directly interacted with HNF-4alpha (intermolecular distance of 73 A) at high affinity (K(d)=64-111 nM) similar to native ACBP. The his-tag also had no effect on ACBPs ability to interact with and stimulate microsomal enzymes utilizing or forming fatty acyl CoA. Thus, C-terminal his-tagged-ACBP maintained very similar structural and functional features of the untagged native protein and can be used in further in vitro experiments that require pure recombinant ACBP.
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English SB, Butte AJ. Evaluation and integration of 49 genome-wide experiments and the prediction of previously unknown obesity-related genes. Bioinformatics 2007; 23:2910-7. [PMID: 17921495 DOI: 10.1093/bioinformatics/btm483] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
MOTIVATION Genome-wide experiments only rarely show resounding success in yielding genes associated with complex polygenic disorders. We evaluate 49 obesity-related genome-wide experiments with publicly available findings including microarray, genetics, proteomics and gene knock-down from human, mouse, rat and worm, in terms of their ability to rediscover a comprehensive set of genes previously found to be causally associated or having variants associated with obesity. RESULTS Individual experiments show poor predictive ability for rediscovering known obesity-associated genes. We show that intersecting the results of experiments significantly improves the sensitivity, specificity and precision of the prediction of obesity-associated genes. We create an integrative model that statistically significantly outperforms all 49 individual genome-wide experiments. We find that genes known to be associated with obesity are significantly implicated in more obesity-related experiments and use this to provide a list of genes that we predict to have the highest likelihood of association for obesity. The approach described here can include any number and type of genome-wide experiments and might be useful for other complex polygenic disorders as well.
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Affiliation(s)
- Sangeeta B English
- Department of Medicine, Stanford Medical Informatics, Stanford University School of Medicine, Lucile Packard Children's Hospital, Stanford, CA 94305, USA
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Vardhanabhuti S, Wang J, Hannenhalli S. Position and distance specificity are important determinants of cis-regulatory motifs in addition to evolutionary conservation. Nucleic Acids Res 2007; 35:3203-13. [PMID: 17452354 PMCID: PMC1904283 DOI: 10.1093/nar/gkm201] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Computational discovery of cis-regulatory elements remains challenging. To cope with the high false positives, evolutionary conservation is routinely used. However, conservation is only one of the attributes of cis-regulatory elements and is neither necessary nor sufficient. Here, we assess two additional attributes—positional and inter-motif distance specificity—that are critical for interactions between transcription factors. We first show that for a greater than expected fraction of known motifs, the genes that contain the motifs in their promoters in a position-specific or distance-specific manner are related, both in function and/or in expression pattern. We then use the position and distance specificity to discover novel motifs. Our work highlights the importance of distance and position specificity, in addition to the evolutionary conservation, in discovering cis-regulatory motifs.
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Affiliation(s)
| | | | - Sridhar Hannenhalli
- *To whom correspondence should be addressed. Tel: +215 746 8683; Fax: +215 573 3111;
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Creekmore AL, Ziegler YS, Bonéy JL, Nardulli AM. Estrogen receptor alpha regulates expression of the breast cancer 1 associated ring domain 1 (BARD1) gene through intronic DNA sequence. Mol Cell Endocrinol 2007; 267:106-15. [PMID: 17275994 PMCID: PMC1933484 DOI: 10.1016/j.mce.2007.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Revised: 01/05/2007] [Accepted: 01/05/2007] [Indexed: 11/19/2022]
Abstract
We have used a chromatin immunoprecipitation (ChIP)-based cloning strategy to isolate and identify genes associated with estrogen receptor alpha (ERalpha) in MCF-7 human breast cancer cells. One of the gene regions isolated was a 288bp fragment from the ninth intron of the breast cancer 1 associated ring domain (BARD1) gene. We demonstrated that ERalpha associated with this region of the endogenous BARD 1 gene in MCF-7 cells, that ERalpha bound to three of five ERE half sites located in the 288bp BARD1 region, and that this 288bp BARD1 region conferred estrogen responsiveness to a heterologous promoter. Importantly, treatment of MCF-7 cells with estrogen increased BARD1 mRNA and protein levels. These findings demonstrate that ChIP cloning strategies can be utilized to successfully isolate regulatory regions that are far removed from the transcription start site and assist in identifying cis elements involved in conferring estrogen responsiveness.
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Affiliation(s)
- Amy L Creekmore
- Department of Cell and Developmental Biology, University of Illinois, Urbana, IL 61801, USA
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Shulga N, Pastorino JG. Acyl coenzyme A-binding protein augments bid-induced mitochondrial damage and cell death by activating mu-calpain. J Biol Chem 2006; 281:30824-33. [PMID: 16908521 DOI: 10.1074/jbc.m602503200] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Activation of calpain has been shown to occur in some contexts of cell injury and to be essential for loss of cell viability. Part of this may be mediated at the mitochondrial level. It has been demonstrated that calpain activity is necessary for the complete discharge of apoptosis-inducing factor from the mitochondrial intermembrane space and can cause the cleavage of full-length Bid to a more potent truncated form (Polster, B. M., Basanez, G., Etxebarria, A., Hardwick, J. M., and Nicholls, D. G. (2005) J. Biol. Chem. 280, 6447-6454). In this study, we identify acyl-CoA-binding protein (ACBP) as playing a critical role in the activation of calpain upon exposure of mitochondria to both full-length Bid and truncated Bid (t-Bid). Suppression of ACBP levels by small interfering RNA inhibited the t-Bid-induced activation of mitochondrial mu-calpain and release of apoptosis-inducing factor from the mitochondrial intermembrane space and the cleavage of full-length Bid to t-Bid. Moreover, ACBP required the presence of the peripheral benzodiazepine receptor (for which ACBP is a ligand) to be retained at the mitochondria, to activate mu-calpain, and to amplify Bid-induced mitochondrial damage.
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Affiliation(s)
- Nataly Shulga
- Department of Pathology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
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