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Corn peptides ameliorate nonalcoholic fatty liver disease by suppressing endoplasmic reticulum stress via the AMPKα/Sirt1 pathway in vivo and in vitro. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Miao L, Zhang Y, Lin Y, Liu B, Ge X. Appropriate leucine supplementation promotes glucose metabolism and enhances energy homeostasis in juvenile crucian carp (Carassius auratus gibelio var. CAS III). COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2021; 40:100907. [PMID: 34481144 DOI: 10.1016/j.cbd.2021.100907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 08/13/2021] [Accepted: 08/21/2021] [Indexed: 02/07/2023]
Abstract
In order to characterize the molecular mechanisms by which leucine regulates carbohydrate metabolism and energy homeostasis, juvenile crucian carps (Carassius auratus gibelio var. CAS III) fed with a high carbohydrate diet were supplemented with different levels of dietary leucine: 0% (Leu0), 0.4% (Leu4), 0.8% (Leu8), 1.2% (Leu12), 1.6% (Leu16), 2.0% (Leu20), and 5.0% (Leu50). After 8 weeks, RNA sequencing was performed on samples collected from the Leu0, Leu8, Leu12 and Leu50 groups. Differentially expressed genes were then detected and analyzed. The results showed a total of 91.6 Gb of clean bases were generated. Moreover, a total of 1131, 5254, and 1539 DEGs were detected in Leu8, Leu12, and Leu50 compared with Leu0, respectively, encompassing 161 common DEGs. STEM analysis elucidated four significant clusters of DEGs that were associated with "glycerophospholipid metabolism," "glycerolipid metabolism," "PPAR signaling pathway," and "adipocytokine signaling pathway." Moreover, the mRNA expression levels of acyl-CoA synthetase long chain family member 5 (ACSL5), choline kinase beta (CHKB), cryptochrome-1 (CRY1), lon protease homolog 2, peroxisomal isoform X2 (LONP2), lipin 1 (LPIN1), membrane bound O-acyltransferase domain containing 2 (MBOAT2), phosphoenolpyruvate carboxykinase 1 (PEPCK), and uridine-cytidine kinase 2b (UCK2b) were then further investigated in all leucine treatment groups at starvation times of 0 h, 24 h, and 48 h. The results revealed that the expression levels of UCK2b and MBOAT2 were negatively correlated with the addition of leucine, whereas CHKB, LONP2, CRY1, PEPCK, and LPIN1 were positively correlated. In conclusion, dietary leucine supplementation below 1.2% enhanced carbohydrate metabolism in juvenile crucian carp fed with a high-carbohydrate diet, whereas concentrations above 2.0% is a better choice for energy homeostasis under starvation.
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Affiliation(s)
- Linghong Miao
- Key Laboratory for Genetic Breeding of Aquatic Animals and Aquaculture Biology, Freshwater Fisheries Research Centre (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi 214081, China; Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Yuanyuan Zhang
- Shandong Freshwater Fisheries Research Institute, Jinan 250013, China
| | - Yan Lin
- Key Laboratory for Genetic Breeding of Aquatic Animals and Aquaculture Biology, Freshwater Fisheries Research Centre (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi 214081, China
| | - Bo Liu
- Key Laboratory for Genetic Breeding of Aquatic Animals and Aquaculture Biology, Freshwater Fisheries Research Centre (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi 214081, China; Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Xianping Ge
- Key Laboratory for Genetic Breeding of Aquatic Animals and Aquaculture Biology, Freshwater Fisheries Research Centre (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi 214081, China; Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China.
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3
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Zhang L, Li F, Guo Q, Duan Y, Wang W, Zhong Y, Yang Y, Yin Y. Leucine Supplementation: A Novel Strategy for Modulating Lipid Metabolism and Energy Homeostasis. Nutrients 2020; 12:E1299. [PMID: 32370170 PMCID: PMC7282259 DOI: 10.3390/nu12051299] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 04/25/2020] [Accepted: 04/27/2020] [Indexed: 02/07/2023] Open
Abstract
Lipid metabolism is an important and complex biochemical process involved in the storage of energy and maintenance of normal biological functions. Leucine, a branched amino acid, has anti-obesity effects on glucose tolerance, lipid metabolism, and insulin sensitivity. Leucine also modulates mitochondrial dysfunction, representing a new strategy to target aging, neurodegenerative disease, obesity, diabetes, and cardiovascular disease. Although various studies have been carried out, much uncertainty still exists and further studies are required to fully elucidate the relationship between leucine and lipid metabolism. This review offers an up-to-date report on leucine, as key roles in both lipid metabolism and energy homeostasis in vivo and in vitro by acceleration of fatty acid oxidation, lipolysis, activation of the adenosine 5'-monophosphate-activated protein kinase (AMPK)-silent information regulator of transcription 1 (SIRT1)-proliferator-activated receptor γ coactivator-1α (PGC-1α) pathway, synthesis, and/or secretion of adipokines and stability of the gut microbiota.
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Affiliation(s)
- Lingyu Zhang
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (Q.G.); (Y.D.); (W.W.); (Y.Y.)
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Fengna Li
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (Q.G.); (Y.D.); (W.W.); (Y.Y.)
| | - Qiuping Guo
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (Q.G.); (Y.D.); (W.W.); (Y.Y.)
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yehui Duan
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (Q.G.); (Y.D.); (W.W.); (Y.Y.)
| | - Wenlong Wang
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (Q.G.); (Y.D.); (W.W.); (Y.Y.)
- Laboratory of Animal Nutrition and Human Health, School of Biology, Hunan Normal University, Changsha 410018, China
| | - Yinzhao Zhong
- Guangdong Provincial Key Laboratory of Animal Nutrition Regulation, South China Agricultural University, Guangzhou 510642, China;
| | - Yuhuan Yang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
| | - Yulong Yin
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (Q.G.); (Y.D.); (W.W.); (Y.Y.)
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Proteomic Analysis of Beef Tenderloin and Flank Assessed Using an Isobaric Tag for Relative and Absolute Quantitation (iTRAQ). Animals (Basel) 2020; 10:ani10010150. [PMID: 31963250 PMCID: PMC7022852 DOI: 10.3390/ani10010150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 01/10/2023] Open
Abstract
Simple Summary Amino acid composition is among the important indexes of the nutritional composition of meat nutrients. In this study, we performed a proteomic analysis of tenderloin and flank steaks from Simmental cattle using isobaric tags for a relative and absolute quantification (iTRAQ) approach. Seventeen amino acids were detected in tenderloin and flank steaks, including seven essential amino acids and 10 non-essential amino acids. A comparison of the expression patterns in steaks revealed 128 differentially expressed proteins (DEPs). Furthermore, 27 DEPs (p < 0.05) were subjected to Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis. Abstract Herein, we performed a proteomic analysis of tenderloin and flank steaks from Simmental cattle using the isobaric tags for a relative and absolute quantification (iTRAQ) approach. We identified 17 amino acids in both steaks, and Gly, Cys, Ile, Lys, and Pro differed most in abundance between the steak types (p < 0.05). A comparison of the expression patterns in steaks revealed 128 differentially expressed proteins (DEPs), of which 44 were up-regulated and 84 were down-regulated. Furthermore, 27 DEPs (p < 0.05) were subjected to gene ontology (GO) analysis, and many were found to be related to oxidation-reduction, metabolism, hydrogen ion transmembrane transport, transport, the tricarboxylic acid (TCA) cycle, mitochondrial electron transport, and the conversion of nicotinamide adenine dinucleotide (NADH) to ubiquinone. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis also implicated these DEPs in various signalling pathways, including oxidative phosphorylation, cardiac muscle contraction, the TCA cycle, biosynthesis, and the metabolism. These findings provide a new insight into key proteins involved in the determination of amino acid composition in beef.
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Nobis S, Achamrah N, Goichon A, L'Huillier C, Morin A, Guérin C, Chan P, do Rego JL, do Rego JC, Vaudry D, Déchelotte P, Belmonte L, Coëffier M. Colonic Mucosal Proteome Signature Reveals Reduced Energy Metabolism and Protein Synthesis but Activated Autophagy during Anorexia-Induced Malnutrition in Mice. Proteomics 2018; 18:e1700395. [PMID: 29938906 DOI: 10.1002/pmic.201700395] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 06/12/2018] [Indexed: 12/18/2022]
Abstract
Anorexia nervosa is an eating disorder often associated with intestinal disorders. To explore the underlying mechanisms of these disorders, the colonic proteome was evaluated during activity-based anorexia. Female C57Bl/6 mice were randomized into three groups: Control, Limited Food Access (LFA) and Activity-Based Anorexia (ABA). LFA and ABA mice had a progressive limited access to food but only ABA mice had access to an activity wheel. On colonic mucosal protein extracts, a 2D PAGE-based comparative proteomic analysis was then performed and differentially expressed proteins were identified by LC-ESI-MS/MS. Twenty-seven nonredundant proteins that were differentially expressed between Control, LFA, and ABA groups were identified. ABA mice exhibited alteration of several mitochondrial proteins involved in energy metabolism such as dihydrolipoyl dehydrogenase and 3-mercaptopyruvate sulfurtransferase. In addition, a downregulation of mammalian target of rapamycin (mTOR) pathway was observed leading, on the one hand, to the inhibition of protein synthesis, evaluated by puromycin incorporation and mediated by the increased phosphorylation of eukaryotic elongation factor 2, and on the other hand, to the activation of autophagy, assessed by the increase of the marker of autophagy, form LC3-phosphatidylethanolamine conjugate/Cytosolic form of Microtubule-associated protein 1A/1B light chain 3 (LC3II/LC3I) ratio. Colonic mucosal proteome is altered during ABA suggesting a downregulation of energy metabolism. A decrease of protein synthesis and an activation of autophagy were also observed mediated by mTOR pathway.
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Affiliation(s)
- Séverine Nobis
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Najate Achamrah
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Nutrition Department, Rouen University Hospital, 76000, Rouen, France
| | - Alexis Goichon
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Clément L'Huillier
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Aline Morin
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Charlène Guérin
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Philippe Chan
- Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Platform in proteomics PISSARO, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Jean Luc do Rego
- Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Animal Behaviour Platform SCAC, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Jean Claude do Rego
- Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Animal Behaviour Platform SCAC, UNIROUEN, Normandie University, 76000, Rouen, France
| | - David Vaudry
- Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Platform in proteomics PISSARO, UNIROUEN, Normandie University, 76000, Rouen, France.,INSERM Unit 1239, UNIROUEN, Normandie University, 76000, Rouen, France
| | - Pierre Déchelotte
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Nutrition Department, Rouen University Hospital, 76000, Rouen, France
| | - Liliana Belmonte
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Nutrition Department, Rouen University Hospital, 76000, Rouen, France
| | - Moïse Coëffier
- INSERM Unit 1073, UNIROUEN, Normandie University, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine, UNIROUEN, Normandie University, 76000, Rouen, France.,Nutrition Department, Rouen University Hospital, 76000, Rouen, France
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Triff K, McLean MW, Callaway E, Goldsby J, Ivanov I, Chapkin RS. Dietary fat and fiber interact to uniquely modify global histone post-translational epigenetic programming in a rat colon cancer progression model. Int J Cancer 2018; 143:1402-1415. [PMID: 29659013 DOI: 10.1002/ijc.31525] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 02/21/2018] [Accepted: 03/22/2018] [Indexed: 12/15/2022]
Abstract
Dietary fermentable fiber generates short-chain fatty acids (SCFA), for example, butyrate, in the colonic lumen which serves as a chemoprotective histone deacetylase inhibitor and/or as an acetylation substrate for histone acetylases. In addition, n-3 polyunsaturated fatty acids (n-3 PUFA) in fish oil can affect the chromatin landscape by acting as ligands for tumor suppressive nuclear receptors. In an effort to gain insight into the global dimension of post-translational modification of histones (including H3K4me3 and H3K9ac) and clarify the chemoprotective impact of dietary bioactive compounds on transcriptional control in a preclinical model of colon cancer, we generated high-resolution genome-wide RNA (RNA-Seq) and "chromatin-state" (H3K4me3-seq and H3K9ac-seq) maps for intestinal (epithelial colonocytes) crypts in rats treated with a colon carcinogen and fed diets containing bioactive (i) fish oil, (ii) fermentable fiber (a rich source of SCFA), (iii) a combination of fish oil plus pectin, or (iv) control, devoid of fish oil or pectin. In general, poor correlation was observed between differentially transcribed (DE) and enriched genes (DERs) at multiple epigenetic levels. The combinatorial diet (fish oil + pectin) uniquely affected transcriptional profiles in the intestinal epithelium, for example, upregulating lipid catabolism and beta-oxidation associated genes. These genes were linked to activated ligand-dependent nuclear receptors associated with n-3 PUFA and were also correlated with the mitochondrial L-carnitine shuttle and the inhibition of lipogenesis. These findings demonstrate that the chemoprotective fish oil + pectin combination diet uniquely induces global histone state modifications linked to the expression of chemoprotective genes.
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Affiliation(s)
- Karen Triff
- Department of Nutrition and Food Science - Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX
- Department of Biology, Texas A&M University, College Station, TX
| | - Mathew W McLean
- Department of Statistics, Texas A&M University, College Station, TX
| | - Evelyn Callaway
- Department of Nutrition and Food Science - Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX
| | - Jennifer Goldsby
- Department of Nutrition and Food Science - Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX
| | - Ivan Ivanov
- Veterinary Physiology & Pharmacology, Texas A&M University, College Station, TX
| | - Robert S Chapkin
- Department of Nutrition and Food Science - Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX
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Mao X, Ren M, Chen D, Yu B, Che L, He J, Luo J, Luo Y, Wang J, Sun H. Leucine modulates the IPEC-J2 cell proteome associated with cell proliferation, metabolism and phagocytosis. ACTA ACUST UNITED AC 2018; 4:316-321. [PMID: 30175261 PMCID: PMC6116325 DOI: 10.1016/j.aninu.2018.03.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/14/2018] [Accepted: 03/19/2018] [Indexed: 12/21/2022]
Abstract
Leucine can affect intestinal protein expressions, and improve mucosal immune function. However, little study has been conducted to determine the change of protein component by leucine treatment in intestine epithelial cells. The present study was to cover the key proteins and cell pathways that could be regulated by leucine treatment in porcine intestinal epithelial cell line (IPEC-J2) cells with the approach of proteome analysis. A total number of 3,211 proteins were identified in our approach by searching the database of Uniprot sus scrofa. Among identified proteins, there were 101 proteins expressed differently between control group and leucine group. Compared with the control group, there were 50 up-regulated proteins and 51 down-regulated proteins in leucine group. In these proteins, leucine treatment decreased the expression of some proteins including pyruvate kinase, glyceraldehyde-3-phosphate dehydrogenase, E3 ubiquitin ligase, cathepsin D, caspase 3 and caspase 6, and increased the levels of some proteins, such as some eukaryotic translation initiation factors, ubiquitin carboxyl-terminal hydrolase, DNA-related RNA polymerase II, urokinase plasminogen activator, cyclin-dependent kinase inhibitor 2b, MutL homolog 1, 5-methylcytosine binding domain 4, polymerase δ, α-tubulin, syntaxin 18, Ras homolog D, actin related protein 2/3 complex and cofilin. Via the analysis of Gene Ontology and pathways, these proteins in IPEC-J2 cells were related with some physiological functions, such as protein metabolism, glycolysis, cell proliferation, apoptosis and phagocytosis. Thus, these results suggest that leucine affects gut barrier function possibly via regulating cell proliferation and apoptosis, metabolism and phagocytosis.
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Affiliation(s)
- Xiangbing Mao
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
- Corresponding authors.
| | - Man Ren
- Animal Science Collage, Anhui Science and Technology University, Chuzhou 233100, China
| | - Daiwen Chen
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
| | - Bing Yu
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
| | - Lianqiang Che
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
- Corresponding authors.
| | - Jun He
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
| | - Junqiu Luo
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
| | - Yuheng Luo
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
| | - Jianping Wang
- Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China
| | - Hui Sun
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130033, China
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Takpho N, Watanabe D, Takagi H. Valine biosynthesis in Saccharomyces cerevisiae is regulated by the mitochondrial branched-chain amino acid aminotransferase Bat1. MICROBIAL CELL 2018; 5:293-299. [PMID: 29850466 PMCID: PMC5972033 DOI: 10.15698/mic2018.06.637] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the yeast Saccharomyces cerevisiae, the branched-chain amino acid aminotransferases (BCATs) Bat1 and Bat2 catalyze the conversion of α-ketoisovalerate, α-keto-β-methylvalerate, and α-ketoisokaproate and into valine, isoleucine, and leucine, respectively, as the final step of branched-chain amino acid biosynthesis. Bat1 and Bat2 are homologous proteins that share 77% identity, but Bat1 localizes in the mitochondria and Bat2 in the cytosol. Based on our preliminary finding that only disruption of the BAT1 gene led to slow-growth phenotype, we hypothesized that Bat1 and Bat2 play distinct roles in valine biosynthesis and the regulation of cell growth. In this study, we found that intracellular valine content was dramatically decreased in Δbat1 cells, whereas Δbat2 cells exhibited no changes in the valine level. To further examine the distinct roles of Bat1 and Bat2, we constructed two artificial genes encoding the mitochondrial-targeting signal (MTS)-deleted Bat1 (Bat1-MTS) and the MTS of Bat1-fused Bat2 (Bat2+MTS). Interestingly, Bat2+MTS was relocalized into the mitochondria, because Bat2 localization was changed to the mitochondria by addition of MTS, and could partially restore the valine content and growth in Δbat1Δbat2 cells. These results suggest that the mitochondria are the major site of valine biosynthesis, and mitochondrial BCAT is important for valine biosynthesis in S. cerevisiae.
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Affiliation(s)
- Natthaporn Takpho
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Daisuke Watanabe
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Hiroshi Takagi
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
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Andersson-Hall U, Gustavsson C, Pedersen A, Malmodin D, Joelsson L, Holmäng A. Higher Concentrations of BCAAs and 3-HIB Are Associated with Insulin Resistance in the Transition from Gestational Diabetes to Type 2 Diabetes. J Diabetes Res 2018; 2018:4207067. [PMID: 29967793 PMCID: PMC6008749 DOI: 10.1155/2018/4207067] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/07/2018] [Indexed: 01/22/2023] Open
Abstract
AIM Determine the metabolic profile and identify risk factors of women transitioning from gestational diabetes mellitus (GDM) to type 2 diabetes mellitus (T2DM). METHODS 237 women diagnosed with GDM underwent an oral glucose tolerance test (OGTT), anthropometrics assessment, and completed lifestyle questionnaires six years after pregnancy. Blood was analysed for clinical variables (e.g., insulin, glucose, HbA1c, adiponectin, leptin, and lipid levels) and NMR metabolomics. Based on the OGTT, women were divided into three groups: normal glucose tolerance (NGT), impaired glucose tolerance (IGT), and T2DM. RESULTS Six years after GDM, 19% of subjects had T2DM and 19% IGT. After BMI adjustment, the IGT group had lower HDL, higher leptin, and higher free fatty acid (FFA) levels, and the T2DM group higher triglyceride, FFA, and C-reactive protein levels than the NGT group. IGT and T2DM groups reported lower physical activity. NMR measurements revealed that levels of branched-chain amino acids (BCAAs) and the valine metabolite 3-hydroxyisobyturate were higher in T2DM and IGT groups and correlated with measures of insulin resistance and lipid metabolism. CONCLUSION In addition to well-known clinical risk factors, BCAAs and 3-hydroxyisobyturate are potential markers to be evaluated as predictors of metabolic risk after pregnancy complicated by GDM.
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Affiliation(s)
- Ulrika Andersson-Hall
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Carolina Gustavsson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anders Pedersen
- Swedish NMR Centre, University of Gothenburg, Gothenburg, Sweden
| | - Daniel Malmodin
- Swedish NMR Centre, University of Gothenburg, Gothenburg, Sweden
| | - Louise Joelsson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Agneta Holmäng
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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10
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Dietary leucine supplementation alters energy metabolism and induces slow-to-fast transitions in longissimus dorsi muscle of weanling piglets. Br J Nutr 2017. [DOI: 10.1017/s0007114517001209] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
AbstractLeucine plays an important role in promoting muscle protein synthesis and muscle remodelling. However, what percentage of leucine is appropriate in creep feed and what proteome profile alterations are caused by dietary leucine in the skeletal muscle of piglets remain elusive. In this case, we applied isobaric tags for relative and absolute quantitation to analyse the proteome profile of the longissimus dorsi muscles of weanling piglets fed a normal leucine diet (NL; 1·66 % leucine) and a high-leucine diet (HL; 2·1 % leucine). We identified 157 differentially expressed proteins between these two groups. Bioinformatics analysis of these proteins exhibited the suppression of oxidative phosphorylation and fatty acid β-oxidation, as well as the activation of glycolysis, in the HL group. For further confirmation, we identified that SDHB, ATP5F1, ACADM and HADHB were significantly down-regulated (P<0·01, except ATP5F1, P<0·05), whereas the glycolytic enzyme pyruvate kinase was significantly up-regulated (P<0·05) in the HL group. We also show that enhanced muscle protein synthesis and the transition from slow-to-fast fibres are altered by leucine. Together, these results indicate that leucine may alter energy metabolism and promote slow-to-fast transitions in the skeletal muscle of weanling piglets.
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11
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Duan YH, Li FN, Wen CY, Wang WL, Guo QP, Li YH, Yin YL. Branched-chain amino acid ratios in low-protein diets regulate the free amino acid profile and the expression of hepatic fatty acid metabolism-related genes in growing pigs. J Anim Physiol Anim Nutr (Berl) 2017; 102:e43-e51. [DOI: 10.1111/jpn.12698] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 01/20/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Y. H. Duan
- Key Laboratory of Agro-ecological Processes in Subtropical Region; Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha Hunan China
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Changsha Hunan China
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Changsha Hunan China
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central; Ministry of Agriculture; Changsha Hunan China
- University of Chinese Academy of Sciences; Beijing China
| | - F. N. Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region; Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha Hunan China
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Changsha Hunan China
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Changsha Hunan China
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central; Ministry of Agriculture; Changsha Hunan China
- Hunan Co-Innovation Center of Animal Production Safety; CICAPS; Changsha Hunan China. Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients; Changsha Hunan China
| | - C. Y. Wen
- Laboratory of Animal Nutrition and Human Health; School of Biology; Hunan Normal University; Changsha Hunan China
| | - W. L. Wang
- Laboratory of Animal Nutrition and Human Health; School of Biology; Hunan Normal University; Changsha Hunan China
| | - Q. P. Guo
- Key Laboratory of Agro-ecological Processes in Subtropical Region; Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha Hunan China
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Changsha Hunan China
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Changsha Hunan China
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central; Ministry of Agriculture; Changsha Hunan China
- University of Chinese Academy of Sciences; Beijing China
| | - Y. H. Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region; Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha Hunan China
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Changsha Hunan China
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Changsha Hunan China
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central; Ministry of Agriculture; Changsha Hunan China
- University of Chinese Academy of Sciences; Beijing China
| | - Y. L. Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region; Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha Hunan China
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Changsha Hunan China
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Changsha Hunan China
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central; Ministry of Agriculture; Changsha Hunan China
- Laboratory of Animal Nutrition and Human Health; School of Biology; Hunan Normal University; Changsha Hunan China. College of Animal Science; South China Agricultural University; Guangzhou China
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12
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Duan Y, Duan Y, Li F, Li Y, Guo Q, Ji Y, Tan B, Li T, Yin Y. Effects of supplementation with branched-chain amino acids to low-protein diets on expression of genes related to lipid metabolism in skeletal muscle of growing pigs. Amino Acids 2016; 48:2131-44. [PMID: 27156063 DOI: 10.1007/s00726-016-2223-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 03/24/2016] [Indexed: 11/29/2022]
Abstract
Branched-chain amino acids (BCAA), including leucine (Leu), isoleucine (Ile), and valine (Val), play critical roles in energy homeostasis and lipid metabolism in addition to their other functions, such as in protein metabolism. This study investigated the effects of different dietary BCAA ratios on the intramuscular fat (IMF) content and fatty acid composition in different location of skeletal muscles, including the longissimus dorsi (LD), biceps femoris (BF), and psoas major (PM) muscles of growing pigs, and also examined the mRNA expression levels of genes involved in lipid metabolism in these muscle tissues. The experiment was performed on 40 growing pigs (Large White × Landrace) with a similar initial weight (9.85 ± 0.35 kg). The pigs were randomly assigned to one of five diets: diet A was a positive control and contained 20 % crude protein (CP) with a Leu:Ile:Val ratio of 1:0.51:0.63 according to the recommendation of the National Research Council (NRC); for diets B to E, the CP level was reduced to 17 %, and the Leu:Ile:Val ratios were 1:1:1, 1:0.75:0.75, 1:0.51:0.63, and 1:0.25:0.25, respectively. No significant difference was observed in the average feed intake and feed efficiency of the pigs fed the low protein diet (17 % CP) with BCAA treatments relative to the positive control. However, there was a tendency for increased feed efficiency of the 1:0.75:0.75 group compared with the 1:1:1 group (P = 0.09). The BCAA ratio of 1:0.75:0.75 (17 % CP) increased the IMF content of BF muscle (P < 0.01). Moreover, varied dietary BCAA supplementation with a reduced protein level had different effects on the fatty acid composition of the LD, BF, and PM muscles. The BCAA ratio of 1:0.51:0.63-1:0.75:0.75 (17 % CP) significantly lowered the ratio of n-6 to n-3 polyunsaturated fatty acid in these muscles compared with the positive control group (20 % CP). This effect was associated with an increase in mRNA expression levels of acetyl-CoA carboxylase, lipoprotein lipase, fatty acid transport protein, and fatty acid binding protein 4 in the muscles (P < 0.05). The results indicated that the reduced protein diet (17 % CP) with the BCAA ratio within 1:0.25:0.25-1:0.75:0.75 could increase the IMF content in BF muscle and significantly improve the fatty acid composition in different skeletal muscles accompanied by changes in the expression of genes involved in lipid metabolism, compared with those in the pigs that received adequate dietary protein (20 %), which might result in improved eating quality and nutritional value of the meat.
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Affiliation(s)
- Yehui Duan
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China.,University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Yangmiao Duan
- University of Chinese Academy of Sciences, Beijing, 100039, China.,Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Fengna Li
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China. .,Hunan Co-Innovation Center of Animal Production Safety (CICAPS), Changsha, 410125, China.
| | - Yinghui Li
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China.,University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Qiuping Guo
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China.,University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Yujiao Ji
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China
| | - Bie Tan
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China.,Hunan Co-Innovation Center of Animal Production Safety (CICAPS), Changsha, 410125, China.,Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, Changsha, 410128, China
| | - Tiejun Li
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China
| | - Yulong Yin
- Key Laboratory of Agroecology in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central China, Research Center for Healthy Breeding Livestock and Poultry, Hunan Engineering and Research Center for Animal and Poultry Science, Institute of Subtropical Agriculture, Ministry of Agriculture, Chinese Academy of Science, No. 644 Yuanda Road, Furong District, Changsha, 410125, Hunan, China. .,Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, Changsha, 410128, China. .,School of Biology, Hunan Normal University, Changsha, 410018, China.
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13
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Bourgoin-Voillard S, Goron A, Seve M, Moinard C. Regulation of the proteome by amino acids. Proteomics 2016; 16:831-46. [DOI: 10.1002/pmic.201500347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 12/30/2015] [Accepted: 01/12/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Sandrine Bourgoin-Voillard
- Plateforme de Protéomique PROMETHEE; IAB; University Grenoble Alpes; Grenoble France
- Plateforme de Protéomique PROMETHEE, Institut de Biologie et de Pathologie; CHU de Grenoble; Grenoble France
- Plateforme de Protéomique PROMETHEE; IAB; INSERM; Grenoble France
| | - Arthur Goron
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); University Grenoble Alpes; Grenoble France
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); INSERM; Grenoble France
| | - Michel Seve
- Plateforme de Protéomique PROMETHEE; IAB; University Grenoble Alpes; Grenoble France
- Plateforme de Protéomique PROMETHEE, Institut de Biologie et de Pathologie; CHU de Grenoble; Grenoble France
- Plateforme de Protéomique PROMETHEE; IAB; INSERM; Grenoble France
| | - Christophe Moinard
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); University Grenoble Alpes; Grenoble France
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); INSERM; Grenoble France
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14
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Goichon A, Bertrand J, Chan P, Lecleire S, Coquard A, Cailleux AF, Vaudry D, Déchelotte P, Coëffier M. Enteral delivery of proteins enhances the expression of proteins involved in the cytoskeleton and protein biosynthesis in human duodenal mucosa. Am J Clin Nutr 2015; 102:359-67. [PMID: 26109581 PMCID: PMC7109707 DOI: 10.3945/ajcn.114.104216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 05/20/2015] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Amino acids are well known to be key effectors of gut protein turnover. We recently reported that enteral delivery of proteins markedly stimulated global duodenal protein synthesis in carbohydrate-fed healthy humans, but specifically affected proteins remain unknown. OBJECTIVE We aimed to assess the influence of an enteral protein supply on the duodenal mucosal proteome in carbohydrate-fed humans. DESIGN Six healthy volunteers received for 5 h, on 2 occasions and in random order, either an enteral infusion of maltodextrins alone (0.25 g · kg⁻¹ · h⁻¹) mimicking the fed state or maltodextrins with a protein powder (0.14 g proteins · kg⁻¹ · h⁻¹). Endoscopic duodenal biopsy specimens were then collected and frozen until analysis. A 2-dimensional polyacrylamide gel electrophoresis-based comparative proteomics analysis was then performed, and differentially expressed proteins (at least ±1.5-fold change; Student's t test, P < 0.05) were identified by mass spectrometry. Protein expression changes were confirmed by Western blot analysis. RESULTS Thirty-two protein spots were differentially expressed after protein delivery compared with maltodextrins alone: 28 and 4 spots were up- or downregulated, respectively. Among the 22 identified proteins, 11 upregulated proteins were involved either in the cytoskeleton (ezrin, moesin, plastin 1, lamin B1, vimentin, and β-actin) or in protein biosynthesis (glutamyl-prolyl-transfer RNA synthetase, glutaminyl-transfer RNA synthetase, elongation factor 2, elongation factor 1δ, and eukaryotic translation and initiation factor 3 subunit f). CONCLUSIONS Enteral delivery of proteins altered the duodenal mucosal proteome and mainly stimulated the expression of proteins involved in cytoskeleton and protein biosynthesis. These results suggest that protein supply may affect intestinal morphology by stimulating actin cytoskeleton remodeling.
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Affiliation(s)
- Alexis Goichon
- INSERM Unit 1073, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France
| | - Julien Bertrand
- INSERM Unit 1073, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France
| | - Philippe Chan
- Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France; Platform of Proteomics PISSARO, Mont-Saint-Aignan, France
| | - Stéphane Lecleire
- INSERM Unit 1073, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France; Gastroenterology, Rouen University Hospital, Rouen, France
| | | | - Anne-Françoise Cailleux
- Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France; Clinical Investigation Centre CIC 1404-INSERM, Rouen, France
| | - David Vaudry
- Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France; INSERM Unit 982, Mont-Saint-Aignan, France; and Platform of Proteomics PISSARO, Mont-Saint-Aignan, France
| | - Pierre Déchelotte
- INSERM Unit 1073, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen University, Rouen, France; Departments of Nutrition,
| | - Moïse Coëffier
- INSERM Unit 1073, Rouen, France; Clinical Investigation Centre CIC 1404-INSERM, Rouen, France
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15
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Bai J, Greene E, Li W, Kidd MT, Dridi S. Branched-chain amino acids modulate the expression of hepatic fatty acid metabolism-related genes in female broiler chickens. Mol Nutr Food Res 2015; 59:1171-81. [PMID: 25787688 DOI: 10.1002/mnfr.201400918] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 02/05/2015] [Accepted: 03/05/2015] [Indexed: 01/22/2023]
Abstract
SCOPE The effects and roles of branched-chain amino acids (BCAAs) in hepatic fat metabolism are still unknown. METHODS AND RESULTS Here, we used broiler chickens, in which lipogenesis occurs essentially in the liver as in human, to investigate the effects of three levels of BCAAs (control "C," low "L" and exogenous supplemented diet "L+S") on growth, carcass traits, immunity, and hepatic fat metabolism. Despite the same productive performance, immunity, and plasma BCAA levels between all groups, low BCAA levels significantly downregulated the hepatic expression of lipogenic genes particularly acetyl-CoA carboxylase alpha (ACCα) and stearoyl-coA desaturase 1 (p = 0.0036 and p = 0.0008, respectively) and upregulated the hepatic expression of mitochondrial β-oxidation- (uncoupling protein and NRF-1, p < 0.05) and dynamic-related genes (DNM1, p < 0.05). Concomitant with these changes, low BCAA levels increased the phosphorylation of AMP-activated protein kinase (AMPK)α(Thr172), ACCα(Ser79), and forkhead box protein O1 (FoxO1(Ser256)) and decreased the phosphorylation of mTOR(Ser2481) and P70 S6 kinase (Thr389). The mRNA abundance of the transcription factors SREBP1/2, peroxisome proliferator activated receptor alpha/beta, and FoxO1 were also increased in the liver of L group compared to the control. CONCLUSION Together our data indicate that low BCAA levels inhibit fatty acid synthesis and enhanced fatty acid β-oxidation in the liver of female broiler chickens and these effects were probably mediated through AMPK-mTOR-FoxO1 pathway.
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Affiliation(s)
- Jie Bai
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR, USA.,Key Laboratory of Molecular Animal Nutrition, College of Animal Science, Zhejiang University, Hangzhou, China
| | - Elizabeth Greene
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR, USA
| | - Weifen Li
- Key Laboratory of Molecular Animal Nutrition, College of Animal Science, Zhejiang University, Hangzhou, China
| | - Michael T Kidd
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR, USA
| | - Sami Dridi
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR, USA
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Rauschert S, Uhl O, Koletzko B, Hellmuth C. Metabolomic biomarkers for obesity in humans: a short review. ANNALS OF NUTRITION AND METABOLISM 2014; 64:314-24. [PMID: 25300275 DOI: 10.1159/000365040] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND The prevalence and incidence of obesity have become a major public health problem during the last decades, but the underlying biochemical and metabolic processes are not fully understood. Metabolomics, the science of small molecules of the metabolism, is helping to unravel these mechanisms via the identification of markers related to obesity. These biomarkers are used to prevent diseases in later life or for the early diagnosis of diseases. This review focuses on articles dealing with biomarkers for obesity. KEY MESSAGES Branched-chain amino acids (BCAA), nonesterified fatty acids, organic acids, acylcarnitines, and phospholipids were identified as potential biomarkers for obesity. This indicates a relation between elevated BCAA, and other amino acids, and the obese state. Furthermore, deregulation of β-oxidation is associated with the development of obesity. The results have several limitations, including the differing ages of the subjects in the studies, the fact that all of the studies had a case-control design and therefore no causal explanatory power, and that most looked for similar metabolites and reported almost equal results. CONCLUSION The strength of this review is that it gives a comprehensive overview of the current status of the knowledge on metabolomics biomarkers for obesity, but further research is needed because the methods used in the studies to date are very homogenous, e.g. most used a targeted approach and therefore analyzed almost the same group of metabolites. Moreover, prospective studies are lacking since all of the studies are either case-control or cross-sectional studies.
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Affiliation(s)
- Sebastian Rauschert
- Division of Metabolic and Nutritional Medicine, Dr. von Hauner Children's Hospital, Ludwig Maximilian University of Munich, Munich, Germany
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