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Tao Y, Zhang Q, Wang H, Yang X, Mu H. Alternative splicing and related RNA binding proteins in human health and disease. Signal Transduct Target Ther 2024; 9:26. [PMID: 38302461 PMCID: PMC10835012 DOI: 10.1038/s41392-024-01734-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 12/18/2023] [Accepted: 12/27/2023] [Indexed: 02/03/2024] Open
Abstract
Alternative splicing (AS) serves as a pivotal mechanism in transcriptional regulation, engendering transcript diversity, and modifications in protein structure and functionality. Across varying tissues, developmental stages, or under specific conditions, AS gives rise to distinct splice isoforms. This implies that these isoforms possess unique temporal and spatial roles, thereby associating AS with standard biological activities and diseases. Among these, AS-related RNA-binding proteins (RBPs) play an instrumental role in regulating alternative splicing events. Under physiological conditions, the diversity of proteins mediated by AS influences the structure, function, interaction, and localization of proteins, thereby participating in the differentiation and development of an array of tissues and organs. Under pathological conditions, alterations in AS are linked with various diseases, particularly cancer. These changes can lead to modifications in gene splicing patterns, culminating in changes or loss of protein functionality. For instance, in cancer, abnormalities in AS and RBPs may result in aberrant expression of cancer-associated genes, thereby promoting the onset and progression of tumors. AS and RBPs are also associated with numerous neurodegenerative diseases and autoimmune diseases. Consequently, the study of AS across different tissues holds significant value. This review provides a detailed account of the recent advancements in the study of alternative splicing and AS-related RNA-binding proteins in tissue development and diseases, which aids in deepening the understanding of gene expression complexity and offers new insights and methodologies for precision medicine.
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Affiliation(s)
- Yining Tao
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 200000, Shanghai, China
- Shanghai Bone Tumor Institution, 200000, Shanghai, China
| | - Qi Zhang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 200000, Shanghai, China
| | - Haoyu Wang
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 200000, Shanghai, China
- Shanghai Bone Tumor Institution, 200000, Shanghai, China
| | - Xiyu Yang
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 200000, Shanghai, China
- Shanghai Bone Tumor Institution, 200000, Shanghai, China
| | - Haoran Mu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 200000, Shanghai, China.
- Shanghai Bone Tumor Institution, 200000, Shanghai, China.
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2
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Tighanimine K, Nabuco Leva Ferreira Freitas JA, Nemazanyy I, Bankolé A, Benarroch-Popivker D, Brodesser S, Doré G, Robinson L, Benit P, Ladraa S, Saada YB, Friguet B, Bertolino P, Bernard D, Canaud G, Rustin P, Gilson E, Bischof O, Fumagalli S, Pende M. A homoeostatic switch causing glycerol-3-phosphate and phosphoethanolamine accumulation triggers senescence by rewiring lipid metabolism. Nat Metab 2024; 6:323-342. [PMID: 38409325 PMCID: PMC10896726 DOI: 10.1038/s42255-023-00972-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 12/21/2023] [Indexed: 02/28/2024]
Abstract
Cellular senescence affects many physiological and pathological processes and is characterized by durable cell cycle arrest, an inflammatory secretory phenotype and metabolic reprogramming. Here, by using dynamic transcriptome and metabolome profiling in human fibroblasts with different subtypes of senescence, we show that a homoeostatic switch that results in glycerol-3-phosphate (G3P) and phosphoethanolamine (pEtN) accumulation links lipid metabolism to the senescence gene expression programme. Mechanistically, p53-dependent glycerol kinase activation and post-translational inactivation of phosphate cytidylyltransferase 2, ethanolamine regulate this metabolic switch, which promotes triglyceride accumulation in lipid droplets and induces the senescence gene expression programme. Conversely, G3P phosphatase and ethanolamine-phosphate phospho-lyase-based scavenging of G3P and pEtN acts in a senomorphic way by reducing G3P and pEtN accumulation. Collectively, our study ties G3P and pEtN accumulation to controlling lipid droplet biogenesis and phospholipid flux in senescent cells, providing a potential therapeutic avenue for targeting senescence and related pathophysiology.
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Affiliation(s)
- Khaled Tighanimine
- Université Paris Cité, CNRS, Inserm, Institut Necker Enfants Malades (INEM), Paris, France
| | - José Américo Nabuco Leva Ferreira Freitas
- IMRB, Mondor Institute for Biomedical Research, Inserm U955, Université Paris Est Créteil, UPEC, Faculté de Médecine de Créteil 8, Créteil, France
- Sorbonne Université, CNRS, INSERM, Institut de Biologie Paris Seine, Biological Adaptation and Ageing (B2A-IBPS), Paris, France
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, Structure Fédérative de Recherche Necker, INSERM US24/CNRS UAR 3633, Paris, France
| | - Alexia Bankolé
- Université Paris Cité, CNRS, Inserm, Institut Necker Enfants Malades (INEM), Paris, France
| | | | - Susanne Brodesser
- University of Cologne, Faculty of Medicine and University Hospital of Cologne, Cluster of Excellence Cellular Stress Responses in Aging-associated Diseases (CECAD), Cologne, Germany
| | - Gregory Doré
- Institut Pasteur, Plasmodium RNA Biology Unit, Paris, France
| | - Lucas Robinson
- Institut Pasteur, Department of Cell Biology and Infection, INSERM, Paris, France
| | - Paule Benit
- Université Paris Cité, Inserm U1141, NeuroDiderot, Paris, France
| | - Sophia Ladraa
- Université Paris Cité, CNRS, Inserm, Institut Necker Enfants Malades (INEM), Paris, France
| | - Yara Bou Saada
- Sorbonne Université, CNRS, INSERM, Institut de Biologie Paris Seine, Biological Adaptation and Ageing (B2A-IBPS), Paris, France
| | - Bertrand Friguet
- Sorbonne Université, CNRS, INSERM, Institut de Biologie Paris Seine, Biological Adaptation and Ageing (B2A-IBPS), Paris, France
| | - Philippe Bertolino
- Equipe Labellisée la Ligue Contre le Cancer, Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - David Bernard
- Equipe Labellisée la Ligue Contre le Cancer, Centre de Recherche en Cancérologie de Lyon, Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Université de Lyon, Lyon, France
| | - Guillaume Canaud
- Université Paris Cité, CNRS, Inserm, Institut Necker Enfants Malades (INEM), Paris, France
- Unité de médecine translationnelle et thérapies ciblées, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Pierre Rustin
- Université Paris Cité, Inserm U1141, NeuroDiderot, Paris, France
| | - Eric Gilson
- Université Côte d'Azur, Inserm, CNRS, Institut for Research on Cancer and Aging (IRCAN), Nice, France
- Department of Medical Genetics, University-Hospital (CHU) of Nice, Nice, France
| | - Oliver Bischof
- IMRB, Mondor Institute for Biomedical Research, Inserm U955, Université Paris Est Créteil, UPEC, Faculté de Médecine de Créteil 8, Créteil, France.
| | - Stefano Fumagalli
- Université Paris Cité, CNRS, Inserm, Institut Necker Enfants Malades (INEM), Paris, France.
| | - Mario Pende
- Université Paris Cité, CNRS, Inserm, Institut Necker Enfants Malades (INEM), Paris, France.
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Lokumcu T, Iskar M, Schneider M, Helm D, Klinke G, Schlicker L, Bethke F, Müller G, Richter K, Poschet G, Phillips E, Goidts V. Proteomic, Metabolomic, and Fatty Acid Profiling of Small Extracellular Vesicles from Glioblastoma Stem-Like Cells and Their Role in Tumor Heterogeneity. ACS NANO 2024; 18:2500-2519. [PMID: 38207106 PMCID: PMC10811755 DOI: 10.1021/acsnano.3c11427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/27/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024]
Abstract
Glioblastoma is a deadly brain tumor for which there is no cure. The presence of glioblastoma stem-like cells (GSCs) contributes to the heterogeneous nature of the disease and makes developing effective therapies challenging. Glioblastoma cells have been shown to influence their environment by releasing biological nanostructures known as extracellular vesicles (EVs). Here, we investigated the role of GSC-derived nanosized EVs (<200 nm) in glioblastoma heterogeneity, plasticity, and aggressiveness, with a particular focus on their protein, metabolite, and fatty acid content. We showed that conditioned medium and small extracellular vesicles (sEVs) derived from cells of one glioblastoma subtype induced transcriptomic and proteomic changes in cells of another subtype. We found that GSC-derived sEVs are enriched in proteins playing a role in the transmembrane transport of amino acids, carboxylic acids, and organic acids, growth factor binding, and metabolites associated with amino acid, carboxylic acid, and sugar metabolism. This suggests a dual role of GSC-derived sEVs in supplying neighboring GSCs with valuable metabolites and proteins responsible for their transport. Moreover, GSC-derived sEVs were enriched in saturated fatty acids, while their respective cells were high in unsaturated fatty acids, supporting that the loading of biological cargos into sEVs is a highly regulated process and that GSC-derived sEVs could be sources of saturated fatty acids for the maintenance of glioblastoma cell metabolism. Interestingly, sEVs isolated from GSCs of the proneural and mesenchymal subtypes are enriched in specific sets of proteins, metabolites, and fatty acids, suggesting a molecular collaboration between transcriptionally different glioblastoma cells. In summary, this study revealed the complexity of GSC-derived sEVs and unveiled their potential contribution to tumor heterogeneity and critical cellular processes commonly deregulated in glioblastoma.
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Affiliation(s)
- Tolga Lokumcu
- Brain
Tumor Translational Targets, German Cancer
Research Center (DKFZ), Heidelberg 69120, Germany
- Faculty
of Biosciences, University of Heidelberg, Heidelberg 69120, Germany
| | - Murat Iskar
- Friedrich
Miescher Institute for Biomedical Research, Basel 4058, Switzerland
| | - Martin Schneider
- Proteomics
Core Facility, German Cancer Research Center
(DKFZ), Heidelberg 69120, Germany
| | - Dominic Helm
- Proteomics
Core Facility, German Cancer Research Center
(DKFZ), Heidelberg 69120, Germany
| | - Glynis Klinke
- Metabolomics
Core Technology Platform, Centre for Organismal Studies, Heidelberg University, Heidelberg 69120, Germany
| | - Lisa Schlicker
- Proteomics
Core Facility, German Cancer Research Center
(DKFZ), Heidelberg 69120, Germany
- Division
of Tumor Metabolism and Microenvironment, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany
| | - Frederic Bethke
- Brain
Tumor Translational Targets, German Cancer
Research Center (DKFZ), Heidelberg 69120, Germany
| | - Gabriele Müller
- Brain
Tumor Translational Targets, German Cancer
Research Center (DKFZ), Heidelberg 69120, Germany
| | - Karsten Richter
- Core
Facility Electron Microscopy, German Cancer
Research Center (DKFZ), Heidelberg 69120, Germany
| | - Gernot Poschet
- Metabolomics
Core Technology Platform, Centre for Organismal Studies, Heidelberg University, Heidelberg 69120, Germany
| | - Emma Phillips
- Brain
Tumor Translational Targets, German Cancer
Research Center (DKFZ), Heidelberg 69120, Germany
| | - Violaine Goidts
- Brain
Tumor Translational Targets, German Cancer
Research Center (DKFZ), Heidelberg 69120, Germany
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4
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Guo Y, Wei S, Yin M, Cao D, Li Y, Wen C, Zhou J. Gas Chromatography-Mass Spectrometry Reveals Stage-Specific Metabolic Signatures of Ankylosing Spondylitis. Metabolites 2023; 13:1058. [PMID: 37887383 PMCID: PMC10608640 DOI: 10.3390/metabo13101058] [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: 08/16/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 10/28/2023] Open
Abstract
Ankylosing spondylitis (AS) is a type of chronic rheumatic immune disease, and the crucial point of AS treatment is identifying the correct stage of the disease. However, there is a lack of effective diagnostic methods for AS staging. The primary objective of this study was to perform an untargeted metabolomic approach in AS patients in an effort to reveal metabolic differences between patients in remission and acute stages. Serum samples from 40 controls and 57 AS patients were analyzed via gas chromatography-mass spectrometry (GC-MS). Twenty-four kinds of differential metabolites were identified between the healthy controls and AS patients, mainly involving valine/leucine/isoleucine biosynthesis and degradation, phenylalanine/tyrosine/tryptophan biosynthesis, glutathione metabolism, etc. Furthermore, the levels of fatty acids (linoleate, dodecanoate, hexadecanoate, and octadecanoate), amino acids (serine and pyroglutamate), 2-hydroxybutanoate, glucose, etc., were lower in patients in the acute stage than those in the remission stage, which may be associated with the aggravated inflammatory response and elevated oxidative stress in the acute stage. Multiple stage-specific metabolites were significantly correlated with inflammatory indicators (CRP and ESR). In addition, the combination of serum 2-hydroxybutanoate and hexadecanoate plays a significant role in the diagnosis of AS stages. These metabolomics-based findings provide new perspectives for AS staging, treatment, and pathogenesis studies.
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Affiliation(s)
- Yixuan Guo
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
| | - Shuangshuang Wei
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
| | - Mengdi Yin
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
| | - Dandan Cao
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
| | - Yiling Li
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
| | - Chengping Wen
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
- Key Laboratory of Chinese Medicine Rheumatology of Zhejiang Province, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Jia Zhou
- Institute of Basic Research in Clinical Medicine, College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China; (Y.G.); (S.W.); (M.Y.); (D.C.); (Y.L.)
- Key Laboratory of Chinese Medicine Rheumatology of Zhejiang Province, Zhejiang Chinese Medical University, Hangzhou 310053, China
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5
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Bridge-Comer PE, Reilly SM. Measuring the Rate of Lipolysis in Ex vivo Murine Adipose Tissue and Primary Preadipocytes Differentiated In Vitro. J Vis Exp 2023:10.3791/65106. [PMID: 37010285 PMCID: PMC10583296 DOI: 10.3791/65106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
Abstract
Adipocytes store energy in the form of triglycerides in lipid droplets. This energy can be mobilized via lipolysis, where the fatty acid side chains are sequentially cleaved from the glycerol backbone, resulting in the release of free fatty acids and glycerol. Due to the low expression of glycerol kinase in white adipocytes, glycerol re-uptake rates are negligible, while fatty acid re-uptake is dictated by the fatty acid binding capacity of media components such as albumin. Both glycerol and fatty acid release into media can be quantified by colorimetric assays to determine the lipolytic rate. By measuring these factors at multiple time points, one can determine the linear rate of lipolysis with high confidence. Here, we provide a detailed protocol for the measurement of lipolysis in in vitro differentiated adipocytes and ex vivo adipose tissue from mice. This protocol may also be optimized for other preadipocyte cell lines or adipose tissue from other organisms; considerations and optimization parameters are discussed. This protocol is designed to be useful in determining and comparing the rate of adipocyte lipolysis between mouse models and treatments.
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Affiliation(s)
- Pania E Bridge-Comer
- Weill Center for Metabolic Health, Department of Medicine, Weill Cornell Medicine
| | - Shannon M Reilly
- Weill Center for Metabolic Health, Department of Medicine, Weill Cornell Medicine;
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6
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Cryo-EM structure supports a role of AQP7 as a junction protein. Nat Commun 2023; 14:600. [PMID: 36737436 PMCID: PMC9898259 DOI: 10.1038/s41467-023-36272-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 01/23/2023] [Indexed: 02/05/2023] Open
Abstract
Aquaglyceroporin 7 (AQP7) facilitates glycerol flux across the plasma membrane with a critical physiological role linked to metabolism, obesity, and associated diseases. Here, we present the single-particle cryo-EM structure of AQP7 determined at 2.55 Å resolution adopting two adhering tetramers, stabilized by extracellularly exposed loops, in a configuration like that of the well-characterized interaction of AQP0 tetramers. The central pore, in-between the four monomers, displays well-defined densities restricted by two leucine filters. Gas chromatography mass spectrometry (GC/MS) results show that the AQP7 sample contains glycerol 3-phosphate (Gro3P), which is compatible with the identified features in the central pore. AQP7 is shown to be highly expressed in human pancreatic α- and β- cells suggesting that the identified AQP7 octamer assembly, in addition to its function as glycerol channel, may serve as junction proteins within the endocrine pancreas.
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7
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Zhang M, Li Q, Wang KL, Dong Y, Mu YT, Cao YM, Liu J, Li ZH, Cui HL, Liu HY, Hu AQ, Zheng YJ. Lipolysis and gestational diabetes mellitus onset: a case-cohort genome-wide association study in Chinese. J Transl Med 2023; 21:47. [PMID: 36698149 PMCID: PMC9875546 DOI: 10.1186/s12967-023-03902-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/17/2023] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Genetic knowledge of gestational diabetes mellitus (GDM) in Chinese women is quite limited. This study aimed to identify the risk factors and mechanism of GDM at the genetic level in a Chinese population. METHODS We conducted a genome-wide association study (GWAS) based on single nucleotide polymorphism (SNP) array genotyping (ASA-CHIA Bead chip, Illumina) and a case-cohort study design. Variants including SNPs, copy number variants (CNVs), and insertions-deletions (InDels) were called from genotyping data. A total of 2232 pregnant women were enrolled in their first/second trimester between February 2018 and December 2020 from Anqing Municipal Hospital in Anhui Province, China. The GWAS included 193 GDM patients and 819 subjects without a diabetes diagnosis, and risk ratios (RRs) and their 95% confidence intervals (CIs) were estimated by a regression-based method conditional on the population structure. The calling and quality control of genotyping data were performed following published guidelines. CNVs were merged into CNV regions (CNVR) to simplify analyses. To interpret the GWAS results, gene mapping and overexpression analyses (ORAs) were further performed to prioritize the candidate genes and related biological mechanisms. RESULTS We identified 14 CNVRs (false discovery rate corrected P values < 0.05) and two suggestively significant SNPs (P value < 0.00001) associated with GDM, and a total of 19 candidate genes were mapped. Ten genes were significantly enriched in gene sets related to lipase (triglyceride lipase and lipoprotein lipase) activity (LIPF, LIPK, LIPN, and LIPJ genes), oxidoreductase activity (TPH1 and TPH2 genes), and cellular components beta-catenin destruction complex (APC and GSK3B genes), Wnt signalosome (APC and GSK3B genes), and lateral element in the Gene Ontology resource (BRCA1 and SYCP2 genes) by two ORA methods (adjusted P values < 0.05). CONCLUSIONS Genes related to lipolysis, redox reaction, and proliferation of islet β-cells are associated with GDM in Chinese women. Energy metabolism, particularly lipolysis, may play an important role in GDM aetiology and pathology, which needs further molecular studies to verify.
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Affiliation(s)
- Miao Zhang
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Qing Li
- Department of Obstetrics and Gynecology, Anqing Municipal Hospital, Anqing, 246003 China
| | - Kai-Lin Wang
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Yao Dong
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Yu-Tong Mu
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Yan-Min Cao
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Jin Liu
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Zi-Heng Li
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Hui-Lu Cui
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
| | - Hai-Yan Liu
- Department of Clinical Laboratory, Anqing Municipal Hospital, Anqing, 246003 China
| | - An-Qun Hu
- Department of Clinical Laboratory, Anqing Municipal Hospital, Anqing, 246003 China
| | - Ying-Jie Zheng
- grid.8547.e0000 0001 0125 2443Department of Epidemiology, School of Public Health, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory for Health Technology Assessment, National Commission of Health and Family Planning, Fudan University, Shanghai, 200032 China ,grid.8547.e0000 0001 0125 2443Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032 China
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8
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Al-Mass A, Poursharifi P, Peyot ML, Lussier R, Chenier I, Leung YH, Ghosh A, Oppong A, Possik E, Mugabo Y, Ahmad R, Sladek R, Murthy Madiraju S, Al-Mulla F, Prentki M. Hepatic glycerol shunt and glycerol-3-phosphate phosphatase control liver metabolism and glucodetoxification under hyperglycemia. Mol Metab 2022; 66:101609. [PMID: 36198384 PMCID: PMC9579801 DOI: 10.1016/j.molmet.2022.101609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 09/30/2022] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE Glycerol-3-phosphate (Gro3P) phosphatase (G3PP) hydrolyzes Gro3P to glycerol that exits the cell, thereby operating a "glycerol shunt", a metabolic pathway that we identified recently in mammalian cells. We have investigated the role of G3PP and the glycerol shunt in the regulation of glucose metabolism and lipogenesis in mouse liver. METHODS We generated hepatocyte-specific G3PP-KO mice (LKO), by injecting AAV8-TBG-iCre to male G3PPfl/fl mice. Controls received AAV8-TBG-eGFP. Both groups were fed chow diet for 10 weeks. Hyperglycemia (16-20 mM) was induced by glucose infusion for 55 h. Hepatocytes were isolated from normoglycemic mice for ex vivo studies and targeted metabolomics were measured in mice liver after glucose infusion. RESULTS LKO mice showed no change in body weight, food intake, fed and fasted glycemia but had increased fed plasma triglycerides. Hepatic glucose production from glycerol was increased in fasted LKO mice. LKO mouse hepatocytes displayed reduced glycerol production, elevated triglyceride and lactate production at high glucose concentration. Hyperglycemia in LKO mice led to increased liver weight and accumulation of triglycerides, glycogen and cholesterol together with elevated levels of Gro3P, dihydroxyacetone phosphate, acetyl-CoA and some Krebs cycle intermediates in liver. Hyperglycemic LKO mouse liver showed elevated expression of proinflammatory cytokines and M1-macrophage markers accompanied by increased plasma triglycerides, LDL/VLDL, urea and uric acid and myocardial triglycerides. CONCLUSIONS The glycerol shunt orchestrated by G3PP acts as a glucose excess detoxification pathway in hepatocytes by preventing metabolic disturbances that contribute to enhanced liver fat, glycogen storage, inflammation and lipid build-up in the heart. We propose G3PP as a novel therapeutic target for hepatic disorders linked to nutrient excess.
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Affiliation(s)
- Anfal Al-Mass
- Department of Medicine, McGill University, Montréal, QC, Canada,Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Pegah Poursharifi
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Marie-Line Peyot
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Roxane Lussier
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Isabelle Chenier
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Yat Hei Leung
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Anindya Ghosh
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Abel Oppong
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Elite Possik
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Yves Mugabo
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada
| | - Rasheed Ahmad
- Departments of Immunology, Microbiology, Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Robert Sladek
- Department of Medicine, McGill University, Montréal, QC, Canada
| | - S.R. Murthy Madiraju
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada,Corresponding author. CRCHUM, Room R08-418, Tour Viger, 900 rue Saint Denis, Montreal, QC H2X 0A9, Canada.
| | - Fahd Al-Mulla
- Departments of Immunology, Microbiology, Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Marc Prentki
- Departments of Nutrition, Biochemistry and Molecular Medicine, University of Montreal, and Montreal Diabetes Research Center and CRCHUM, Montréal, QC, Canada,Corresponding author. Biochemistry and Molecular Medicine, Université de Montréal CRCHUM, Room R08-412, Tour Viger, 900 rue Saint Denis Montreal, QC H2X 0A9, Canada.
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9
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Yu Y, Hao C, Xiang M, Tian J, Kuang H, Li Z. Potential obesogenic effects of TBBPA and its alternatives TBBPS and TCBPA revealed by metabolic perturbations in human hepatoma cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 832:154847. [PMID: 35358527 DOI: 10.1016/j.scitotenv.2022.154847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
To date, increasing numbers of studies have shown the obesogenic effects of tetrabromobisphenol A (TBBPA). Tetrabromobisphenol S (TBBPS) and tetrachlorobisphenol A (TCBPA) are two common alternatives to TBBPA, and their environmental distributions are frequently reported. However, their toxicity and the associated potential health risks are poorly documented. Herein, we performed untargeted metabolomics to study the metabolic perturbations in HepG2 cells exposed to TBBPA and its alternatives. Consequently, no loss of cellular viability was observed in HepG2 cells exposed to 0.1 μmol/L and 1 μmol/L TBBPA, TBBPS and TCBPA. However, multivariate analysis and metabolic profiles revealed significant perturbations in glycerophospholipid and fatty acyl levels in HepG2 cells exposure to TBBPS and TCBPA. The evident increases in the glucose 1-phosphate and fructose 6-phosphate levels in HepG2 cells were proposed to be induced by the promotion of PGM1/PGM2 and GPI gene expression and the suppression of UPG2 and GFPT1/GFPT2 gene expression. Our results suggest that TBBPS and TCBPA are more likely to disrupt liver metabolic homeostasis and potentially drive liver dysfunction than TBBPA. Our study is significant for the re-evaluation of the health risks associated with TBBPA and its alternatives TBBPS and TCBPA.
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Affiliation(s)
- Yunjiang Yu
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China.
| | - Chaojie Hao
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; School of Public Health, China Medical University, Liaoning 110122, China
| | - Mingdeng Xiang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China
| | - Jinglin Tian
- Chemistry Department, Hong Kong Baptist University, Hongkong 999077, China
| | - Hongxuan Kuang
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China
| | - Zhenchi Li
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China.
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10
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Metabolic cycles and signals for insulin secretion. Cell Metab 2022; 34:947-968. [PMID: 35728586 PMCID: PMC9262871 DOI: 10.1016/j.cmet.2022.06.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/01/2022] [Accepted: 06/04/2022] [Indexed: 02/03/2023]
Abstract
In this review, we focus on recent developments in our understanding of nutrient-induced insulin secretion that challenge a key aspect of the "canonical" model, in which an oxidative phosphorylation-driven rise in ATP production closes KATP channels. We discuss the importance of intrinsic β cell metabolic oscillations; the phasic alignment of relevant metabolic cycles, shuttles, and shunts; and how their temporal and compartmental relationships align with the triggering phase or the secretory phase of pulsatile insulin secretion. Metabolic signaling components are assigned regulatory, effectory, and/or homeostatic roles vis-à-vis their contribution to glucose sensing, signal transmission, and resetting the system. Taken together, these functions provide a framework for understanding how allostery, anaplerosis, and oxidative metabolism are integrated into the oscillatory behavior of the secretory pathway. By incorporating these temporal as well as newly discovered spatial aspects of β cell metabolism, we propose a much-refined MitoCat-MitoOx model of the signaling process for the field to evaluate.
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11
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Colom-Pellicer M, Rodríguez RM, Soliz-Rueda JR, de Assis LVM, Navarro-Masip È, Quesada-Vázquez S, Escoté X, Oster H, Mulero M, Aragonès G. Proanthocyanidins Restore the Metabolic Diurnal Rhythm of Subcutaneous White Adipose Tissue According to Time-Of-Day Consumption. Nutrients 2022; 14:2246. [PMID: 35684049 PMCID: PMC9182881 DOI: 10.3390/nu14112246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/23/2022] [Accepted: 05/25/2022] [Indexed: 02/01/2023] Open
Abstract
Consumption of grape seed proanthocyanidin extract (GSPE) has beneficial effects on the functionality of white adipose tissue (WAT). However, although WAT metabolism shows a clear diurnal rhythm, whether GSPE consumption could affect WAT rhythmicity in a time-dependent manner has not been studied. Ninety-six male Fischer rats were fed standard (STD, two groups) or cafeteria (CAF, four groups) diet for 9 weeks (n = 16 each group). From week 6 on, CAF diet animals were supplemented with vehicle or 25 mg GSPE/kg of body weight either at the beginning of the light/rest phase (ZT0) or at the beginning of the dark/active phase (ZT12). The two STD groups were also supplemented with vehicle at ZT0 or ZT12. In week 9, animals were sacrificed at 6 h intervals (n = 4) to analyze the diurnal rhythms of subcutaneous WAT metabolites by nuclear magnetic resonance spectrometry. A total of 45 metabolites were detected, 19 of which presented diurnal rhythms in the STD groups. Although most metabolites became arrhythmic under CAF diet, GSPE consumption at ZT12, but not at ZT0, restored the rhythmicity of 12 metabolites including compounds involved in alanine, aspartate, and glutamate metabolism. These results demonstrate that timed GSPE supplementation may restore, at least partially, the functional dynamics of WAT when it is consumed at the beginning of the active phase. This study opens an innovative strategy for time-dependent polyphenol treatment in obesity and metabolic diseases.
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Affiliation(s)
- Marina Colom-Pellicer
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (R.M.R.); (J.R.S.-R.); (È.N.-M.); (M.M.)
| | - Romina M. Rodríguez
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (R.M.R.); (J.R.S.-R.); (È.N.-M.); (M.M.)
| | - Jorge R. Soliz-Rueda
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (R.M.R.); (J.R.S.-R.); (È.N.-M.); (M.M.)
| | - Leonardo Vinícius Monteiro de Assis
- Center of Brain, Behavior and Metabolism, Institute of Neurobiology, University of Lübeck, Marie Curie Street, 23562 Lübeck, Germany; (L.V.M.d.A.); (H.O.)
| | - Èlia Navarro-Masip
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (R.M.R.); (J.R.S.-R.); (È.N.-M.); (M.M.)
| | - Sergio Quesada-Vázquez
- Unitat de Nutrició i Salut, Centre Tecnològic de Catalunya, Eurecat, 43204 Reus, Spain; (S.Q.-V.); (X.E.)
| | - Xavier Escoté
- Unitat de Nutrició i Salut, Centre Tecnològic de Catalunya, Eurecat, 43204 Reus, Spain; (S.Q.-V.); (X.E.)
| | - Henrik Oster
- Center of Brain, Behavior and Metabolism, Institute of Neurobiology, University of Lübeck, Marie Curie Street, 23562 Lübeck, Germany; (L.V.M.d.A.); (H.O.)
| | - Miquel Mulero
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (R.M.R.); (J.R.S.-R.); (È.N.-M.); (M.M.)
| | - Gerard Aragonès
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (R.M.R.); (J.R.S.-R.); (È.N.-M.); (M.M.)
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12
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Glycerol-3-phosphate phosphatase operates a glycerol shunt in pancreatic β-cells that controls insulin secretion and metabolic stress. Mol Metab 2022; 60:101471. [PMID: 35272070 PMCID: PMC8972011 DOI: 10.1016/j.molmet.2022.101471] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/20/2022] [Accepted: 03/03/2022] [Indexed: 11/23/2022] Open
Abstract
Objective The recently identified glycerol-3-phosphate (Gro3P) phosphatase (G3PP) in mammalian cells, encoded by the PGP gene, was shown to regulate glucose, lipid and energy metabolism by hydrolyzing Gro3P and to control glucose-stimulated insulin secretion (GSIS) in β-cells, in vitro. However, whether G3PP regulates β-cell function and insulin secretion in vivo is not known. Methods We now examined the role of G3PP in the control of insulin secretion in vivo, β-cell function and glucotoxicity in inducible β-cell specific G3PP-KO (BKO) mice. Inducible BKO mice were generated by crossing floxed-G3PP mice with Mip-Cre-ERT (MCre) mice. All the in vivo studies were done using BKO and control mice fed normal diet and the ex vivo studies were done using pancreatic islets from these mice. Results BKO mice, compared to MCre controls, showed increased body weight, adiposity, fed insulinemia, enhanced in vivo GSIS, reduced plasma triglycerides and mild glucose intolerance. Isolated BKO mouse islets incubated at high (16.7 mM), but not at low or intermediate glucose (3 and 8 mM), showed elevated GSIS, Gro3P content as well as increased levels of metabolites and signaling coupling factors known to reflect β-cell activation for insulin secretion. BKO islets also showed reduced glycerol release and increased O2 consumption and ATP production at high glucose only. BKO islets chronically exposed to elevated glucose levels showed increased apoptosis, reduced insulin content and decreased mRNA expression of β-cell differentiation markers, Pdx-1, MafA and Ins-2. Conclusions The results demonstrate that β-cells are endowed with a “glycerol shunt”, operated by G3PP that regulates β-cell metabolism, signaling and insulin secretion in vivo, primarily at elevated glucose concentrations. We propose that the glycerol shunt plays a role in preventing insulin hypersecretion and excess body weight gain and contributes to β-cell mass preservation in the face of hyperglycemia. G3PP operates a glycerol shunt in β-cells to remove excess glucose as glycerol. Inducible β-cell specific G3PP-KO (BKO) mice show hyperinsulinemia. BKO mice show enhanced body weight and glucose induced insulin secretion. BKO isolated islets show elevated insulin secretion only at high glucose. Chronic exposure of BKO isolated islets to high glucose enhances glucotoxicity.
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