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Zhang P, Zhang B, Fu Y, Li P, Zhang H. Cloning and functional characterization of porcine AACS revealing the regulative roles for fat deposition in pigs. PeerJ 2023; 11:e16406. [PMID: 38025737 PMCID: PMC10666648 DOI: 10.7717/peerj.16406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 10/13/2023] [Indexed: 12/01/2023] Open
Abstract
Fat deposition is a quantitative trait controlled by multiple genes in pigs. Using transcriptome sequencing, we previously reported that AACS is differentially expressed in the subcutaneous fat tissue of Dingyuan pigs with divergent backfat thickness. Therefore, with the aim of further characterizing this gene and its protein, we cloned the entire 3286-bp mRNA sequence of the porcine AACS, and the encoded AACS protein is a hydrophilic protein without a signal peptide or transmembrane sequence. Our findings suggested that among various tissues and pig breeds, AACS was highly expressed in subcutaneous fat. We have identified three completely linked SNP loci in the AACS gene: A-1759C, C-1683T, and A-1664G. The double luciferase activity test in the 5' flanking region indicated that the flanking region of AACS contained several active regulatory elements. The three linked SNPs that were identified in one of the critical active elements, and might serve as important molecular markers regulating backfat thickness. Finally, we observed that AACS overexpression inhibited the proliferation and differentiation of subcutaneous preadipocytes. Collectively, our results suggest that AACS inhibits subcutaneous fat deposition in pigs. This study provides a new molecular marker for understanding the mechanism of porcine fat deposition.
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Affiliation(s)
- Pan Zhang
- State Key Laboratory of Animal Biotech Breeding, China Agricultural University, Beijing, China
- Beijing Academy of Science and Technology, Beijing Milu Ecological Research Center, Beijing, China
| | - Bo Zhang
- State Key Laboratory of Animal Biotech Breeding, China Agricultural University, Beijing, China
| | - Yu Fu
- State Key Laboratory of Animal Biotech Breeding, China Agricultural University, Beijing, China
| | - Pan Li
- State Key Laboratory of Animal Biotech Breeding, China Agricultural University, Beijing, China
| | - Hao Zhang
- State Key Laboratory of Animal Biotech Breeding, China Agricultural University, Beijing, China
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Yamasaki M, Hasegawa S, Ozaki S, Imai M, Saito D, Takahashi N. High-Fat-Diet Suppressed Ketone Body Utilization for Lipogenic Pathway in Brown Adipose Tissues. Metabolites 2023; 13:metabo13040519. [PMID: 37110178 PMCID: PMC10145826 DOI: 10.3390/metabo13040519] [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: 03/09/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Brown adipose tissue (BAT) consumes excess lipids and produces lipid metabolites as ketone bodies. These ketone bodies are then recycled for lipogenesis by the enzyme acetoacetyl-CoA synthetase (AACS). Previously, we found that a high-fat diet (HFD) upregulated AACS expression in white adipose tissue. In this study, we investigated the effects of diet-induced obesity on AACS in BAT. When 4-week-old ddY mice were fed a HFD or high-sucrose diet (HSD) for 12 weeks, a significant decrease in Aacs, acetyl-CoA carboxylase-1 (Acc-1), and fatty acid synthase (Fas) expression was observed in the BAT of the HFD group, whereas expression was not affected in the HSD group. In vitro analysis showed decreased Aacs and Fas expression in rat primary-cultured brown adipocytes following isoproterenol treatment for 24 h. In addition, the suppression of Aacs by siRNA markedly decreased the expression of Fas and Acc-1 but did not affect the expression of uncoupling protein-1 (UCP-1) or other factors. These results suggested that HFD may suppress ketone body utilization for lipogenesis in BAT and that AACS gene expression may be important for regulating lipogenesis in BAT. Therefore, the AACS-mediated ketone body utilization pathway may regulate lipogenesis under conditions of excess dietary fat.
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Affiliation(s)
- Masahiro Yamasaki
- Department of Health Chemistry, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Shinya Hasegawa
- Department of Health Chemistry, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Shotaro Ozaki
- Department of Health Chemistry, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Masahiko Imai
- Department of Health Chemistry, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Daisuke Saito
- Department of Health Chemistry, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Noriko Takahashi
- Department of Health Chemistry, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
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Haydar S, Grigorescu F, Vintilă M, Cogne Y, Lautier C, Tutuncu Y, Brun JF, Robine JM, Pugeat M, Normand C, Poucheret P, Gheorghiu ML, Georgescu C, Badiu C, Băculescu N, Renard E, Ylli D, Badiou S, Sutra T, Cristol JP, Mercier J, Gomis R, Macias JM, Litvinov S, Khusnutdinova E, Poiana C, Pasquali R, Lauro D, Sesti G, Prudente S, Trischitta V, Tsatsoulis A, Abdelhak S, Barakat A, Zenati A, Ylli A, Satman I, Kanninen T, Rinato Y, Missoni S. Fine-scale haplotype mapping of MUT, AACS, SLC6A15 and PRKCA genes indicates association with insulin resistance of metabolic syndrome and relationship with branched chain amino acid metabolism or regulation. PLoS One 2019; 14:e0214122. [PMID: 30913280 PMCID: PMC6435171 DOI: 10.1371/journal.pone.0214122] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 03/07/2019] [Indexed: 12/15/2022] Open
Abstract
Branched chain amino acids (BCAA) are essential elements of the human diet, which display increased plasma levels in obesity and regained particular interest as potential biomarkers for development of diabetes. To define determinants of insulin resistance (IR) we investigated 73 genes involved in BCAA metabolism or regulation by fine-scale haplotype mapping in two European populations with metabolic syndrome. French and Romanians (n = 465) were genotyped for SNPs (Affymetrix) and enriched by imputation (BEAGLE 4.1) at 1000 genome project density. Initial association hits detected by sliding window were refined (HAPLOVIEW 3.1 and PHASE 2.1) and correlated to homeostasis model assessment (HOMAIR) index, in vivo insulin sensitivity (SI) and BCAA plasma levels (ANOVA). Four genomic regions were associated with IR located downstream of MUT, AACS, SLC6A15 and PRKCA genes (P between 9.3 and 3.7 x 10-5). Inferred haplotypes up to 13 SNPs length were associated with IR (e.g. MUT gene with P < 4.9 x 10-5; Bonferroni 1.3 x 10-3) and synergistic to HOMAIR. SNPs in the same regions were also associated with one order of magnitude lower P values (e.g. rs20167284 in the MUT gene with P < 1.27 x 10-4) and replicated in Mediterranean samples (n = 832). In French, influential haplotypes (OR > 2.0) were correlated with in vivo insulin sensitivity (1/SI) except for SLC6A15 gene. Association of these genes with BCAA levels was variable, but influential haplotypes confirmed implication of MUT from BCAA metabolism as well as a role of regulatory genes (AACS and PRKCA) and suggested potential changes in transcriptional activity. These data drive attention towards new regulatory regions involved in IR in relation with BCAA and show the ability of haplotypes in phased DNA to detect signals complimentary to SNPs, which may be useful in designing genetic markers for clinical applications in ethnic populations.
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Affiliation(s)
- Sara Haydar
- University of Montpellier, UMR204 NUTRIPASS (IRD, UM, SupAgro), Montpellier, France
| | - Florin Grigorescu
- University of Montpellier, UMR204 NUTRIPASS (IRD, UM, SupAgro), Montpellier, France
| | - Mădălina Vintilă
- Universitatea de Medicina si Farmacie Carol Davila, Department of Endocrinology, Bucharest, Romania
| | - Yannick Cogne
- University of Montpellier, UMR204 NUTRIPASS (IRD, UM, SupAgro), Montpellier, France
| | - Corinne Lautier
- University of Montpellier, UMR204 NUTRIPASS (IRD, UM, SupAgro), Montpellier, France
| | - Yildiz Tutuncu
- Istanbul University, Department of Internal Medicine, Istanbul, Turkey
| | - Jean Frederic Brun
- University of Montpellier, PhyMedExp, INSERM, CNRS, Department of Biochemistry and Hormonology, CHRU Montpellier, Montpellier, France
| | | | - Michel Pugeat
- University Claude Bernard de Lyon 1, Lyon-Bron, France
| | - Christophe Normand
- University of Montpellier, UMR204 NUTRIPASS (IRD, UM, SupAgro), Montpellier, France
| | | | - Monica Livia Gheorghiu
- Universitatea de Medicina si Farmacie Carol Davila, Department of Endocrinology, Bucharest, Romania
| | - Carmen Georgescu
- Universitatea de Medicina si Farmacie Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Corin Badiu
- Universitatea de Medicina si Farmacie Carol Davila, Department of Endocrinology, Bucharest, Romania
| | - Nicoleta Băculescu
- Universitatea de Medicina si Farmacie Carol Davila, Department of Endocrinology, Bucharest, Romania
| | - Eric Renard
- Centre Hospitalier Regional Universitaire de Montpellier, Departement d'Endocrinologie, Diabète, Nutrition, Hôpital Lapeyronie, Montpellier, France
| | - Dorina Ylli
- Mjekesise University of Tirana, Tirana, Albania
| | - Stephanie Badiou
- University of Montpellier, PhyMedExp, INSERM, CNRS, Department of Biochemistry and Hormonology, CHRU Montpellier, Montpellier, France
| | - Thibault Sutra
- University of Montpellier, PhyMedExp, INSERM, CNRS, Department of Biochemistry and Hormonology, CHRU Montpellier, Montpellier, France
| | - Jean Paul Cristol
- University of Montpellier, PhyMedExp, INSERM, CNRS, Department of Biochemistry and Hormonology, CHRU Montpellier, Montpellier, France
| | - Jacques Mercier
- University of Montpellier, PhyMedExp, INSERM, CNRS, Department of Biochemistry and Hormonology, CHRU Montpellier, Montpellier, France
| | - Ramon Gomis
- Institut d'Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
| | | | | | | | - Catalina Poiana
- Universitatea de Medicina si Farmacie Carol Davila, Department of Endocrinology, Bucharest, Romania
| | - Renato Pasquali
- University Alma Mater Studiorum, Division of Endocrinology, Bologna, Italy
| | - Davide Lauro
- Universita degli Studi di Roma Tor Vergata, Roma, Italy
| | - Giorgio Sesti
- University Magna Graecia of Catanzaro, Catanzaro, Italy
| | - Sabrina Prudente
- Scientific Institute Casa Sollievo della Sofferenza, San Giovani Rotondo, Italy
| | - Vincenzo Trischitta
- Scientific Institute Casa Sollievo della Sofferenza, San Giovani Rotondo, Italy
| | - Agathocles Tsatsoulis
- University of Ioannina School of Medicine, Department of Endocrinology, Ioannina, Greece
| | - Sonia Abdelhak
- Institut Pasteur de Tunis, Laboratory of Biomedical Genomics and Oncogenetics, Tunis, Tunisia
| | | | - Akila Zenati
- Universite d'Alger, CHU Bab-El-Oued, Alger, Algeria
| | - Agron Ylli
- Mjekesise University of Tirana, Tirana, Albania
| | - Ilhan Satman
- Istanbul University, Department of Internal Medicine, Istanbul, Turkey
| | | | | | - Sasa Missoni
- Institute for Anthropological Research, Zagreb, Croatia
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Newton BW, Cologna SM, Moya C, Russell DH, Russell WK, Jayaraman A. Proteomic analysis of 3T3-L1 adipocyte mitochondria during differentiation and enlargement. J Proteome Res 2011; 10:4692-702. [PMID: 21815628 DOI: 10.1021/pr200491h] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The increase in adipose tissue mass arises in part from progressive lipid loading and triglyceride accumulation in adipocytes. Enlarged adipocytes produce the highest levels of pro-inflammatory molecules and reactive oxygen species (ROS). Since mitochondria are the site for major metabolic processes (e.g., TCA cycle) that govern the extent of triglyceride accumulation as well as the primary site of ROS generation, we quantitatively investigated changes in the adipocyte mitochondrial proteome during different stages of differentiation and enlargement. Mitochondrial proteins from 3T3-L1 adipocytes at different stages of lipid accumulation (days 0-18) were digested and labeled using the iTRAQ 8-plex kit. The labeled peptides were fractionated using a liquid phase isoelectric fractionation system (MSWIFT) to increase the depth of proteome coverage and analyzed using LC-MS/MS. A total of 631 proteins in the mitochondrial fraction, including endoplasmic reticulum-associated and golgi-related mitochondrial proteins, were identified and classified into 12 functional categories. A total of 123 proteins demonstrated a statistically significant change in expression in at least one of the time points over the course of the experiment. The identified proteins included enzymes and transporters involved in the TCA cycle, fatty acid oxidation, and ATP synthesis. Our results indicate that cultured adipocytes enter a state of metabolic-overdrive where increased flux through the TCA cycle and increased fatty acid oxidation occur simultaneously. The proteomic data also suggest that accumulation of reduced electron carriers and the resultant oxidative stress may be attractive targets for modulating adipocyte function in metabolic disorders.
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Affiliation(s)
- Billy W Newton
- Department of Chemical Engineering, College Station, Texas 77843-3122, United States
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