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Hurrish KH, Su Y, Patel S, Ramage CL, Zhao J, Temby BR, Carter JL, Edwards H, Buck SA, Wiley SE, Hüttemann M, Polin L, Kushner J, Dzinic SH, White K, Bao X, Li J, Yang J, Boerner J, Hou Z, Al-Atrash G, Konoplev SN, Busquets J, Tiziani S, Matherly LH, Taub JW, Konopleva M, Ge Y, Baran N. Enhancing anti-AML activity of venetoclax by isoflavone ME-344 through suppression of OXPHOS and/or purine biosynthesis in vitro. Biochem Pharmacol 2024; 220:115981. [PMID: 38081370 PMCID: PMC11149698 DOI: 10.1016/j.bcp.2023.115981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/16/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023]
Abstract
Venetoclax (VEN), in combination with low dose cytarabine (AraC) or a hypomethylating agent, is FDA approved to treat acute myeloid leukemia (AML) in patients who are over the age of 75 or cannot tolerate standard chemotherapy. Despite high response rates to these therapies, most patients succumb to the disease due to relapse and/or drug resistance, providing an unmet clinical need for novel therapies to improve AML patient survival. ME-344 is a potent isoflavone with demonstrated inhibitory activity toward oxidative phosphorylation (OXPHOS) and clinical activity in solid tumors. Given that OXPHOS inhibition enhances VEN antileukemic activity against AML, we hypothesized that ME-344 could enhance the anti-AML activity of VEN. Here we report that ME-344 enhanced VEN to target AML cell lines and primary patient samples while sparing normal hematopoietic cells. Cooperative suppression of OXPHOS was detected in a subset of AML cell lines and primary patient samples. Metabolomics analysis revealed a significant reduction of purine biosynthesis metabolites by ME-344. Further, lometrexol, a purine biosynthesis inhibitor, synergistically enhanced VEN-induced apoptosis in AML cell lines. Interestingly, AML cells with acquired AraC resistance showed significantly increased purine biosynthesis metabolites and sensitivities to ME-344. Furthermore, synergy between ME-344 and VEN was preserved in these AraC-resistant AML cells. In vivo studies revealed significantly prolonged survival upon combination therapy of ME-344 and VEN in NSGS mice bearing parental or AraC-resistant MV4-11 leukemia compared to the vehicle control. This study demonstrates that ME-344 enhances VEN antileukemic activity against preclinical models of AML by suppressing OXPHOS and/or purine biosynthesis.
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Affiliation(s)
- Katie H Hurrish
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI, USA
| | - Yongwei Su
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Shraddha Patel
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cassandra L Ramage
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jianlei Zhao
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Brianna R Temby
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jenna L Carter
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI, USA; MD/PhD Program, Wayne State University School of Medicine, Detroit, MI, USA
| | - Holly Edwards
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Steven A Buck
- Division of Pediatric Hematology/Oncology, Children's Hospital of Michigan, Detroit, MI, USA
| | | | - Maik Hüttemann
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, USA
| | - Lisa Polin
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Juiwanna Kushner
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Sijana H Dzinic
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Kathryn White
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Xun Bao
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jing Li
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jay Yang
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Julie Boerner
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Zhanjun Hou
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Gheath Al-Atrash
- Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sergej N Konoplev
- Department of Leukemia, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA
| | - Jonathan Busquets
- Department of Nutritional Sciences, The University of Texas at Austin, Austin, TX, USA
| | - Stefano Tiziani
- Department of Nutritional Sciences, The University of Texas at Austin, Austin, TX, USA
| | - Larry H Matherly
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI, USA; Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jeffrey W Taub
- Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA; Division of Pediatric Hematology/Oncology, Children's Hospital of Michigan, Detroit, MI, USA; Department of Pediatrics, Wayne State University School of Medicine, Detroit, MI, USA
| | - Marina Konopleva
- Department of Leukemia, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA.
| | - Yubin Ge
- Cancer Biology Graduate Program, Wayne State University School of Medicine, Detroit, MI, USA; Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA.
| | - Natalia Baran
- Department of Leukemia, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA.
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Fan TWM, Winnike J, Al-Attar A, Belshoff AC, Lorkiewicz PK, Tan JL, Wu M, Higashi RM, Lane AN. Differential Inhibition of Anaplerotic Pyruvate Carboxylation and Glutaminolysis-Fueled Anabolism Underlies Distinct Toxicity of Selenium Agents in Human Lung Cancer. Metabolites 2023; 13:774. [PMID: 37512481 PMCID: PMC10383978 DOI: 10.3390/metabo13070774] [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: 03/11/2023] [Revised: 06/05/2023] [Accepted: 06/13/2023] [Indexed: 07/30/2023] Open
Abstract
Past chemopreventive human trials on dietary selenium supplements produced controversial outcomes. They largely employed selenomethionine (SeM)-based diets. SeM was less toxic than selenite or methylseleninic acid (MSeA) to lung cancer cells. We thus investigated the toxic action of these Se agents in two non-small cell lung cancer (NSCLC) cell lines and ex vivo organotypic cultures (OTC) of NSCLC patient lung tissues. Stable isotope-resolved metabolomics (SIRM) using 13C6-glucose and 13C5,15N2-glutamine tracers with gene knockdowns were employed to examine metabolic dysregulations associated with cell type- and treatment-dependent phenotypic changes. Inhibition of key anaplerotic processes, pyruvate carboxylation (PyC) and glutaminolysis were elicited by exposure to MSeA and selenite but not by SeM. They were accompanied by distinct anabolic dysregulation and reflected cell type-dependent changes in proliferation/death/cell cycle arrest. NSCLC OTC showed similar responses of PyC and/or glutaminolysis to the three agents, which correlated with tissue damages. Altogether, we found differential perturbations in anaplerosis-fueled anabolic pathways to underlie the distinct anti-cancer actions of the three Se agents, which could also explain the failure of SeM-based chemoprevention trials.
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Affiliation(s)
- Teresa W.-M. Fan
- Center for Environmental and Systems Biochemistry, Department Toxicology & Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA; (A.A.-A.); (R.M.H.); (A.N.L.)
| | - Jason Winnike
- Department of Chemistry, University of Louisville, Louisville, KY 40202, USA; (J.W.); (A.C.B.); (P.K.L.)
| | - Ahmad Al-Attar
- Center for Environmental and Systems Biochemistry, Department Toxicology & Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA; (A.A.-A.); (R.M.H.); (A.N.L.)
| | - Alexander C. Belshoff
- Department of Chemistry, University of Louisville, Louisville, KY 40202, USA; (J.W.); (A.C.B.); (P.K.L.)
| | - Pawel K. Lorkiewicz
- Department of Chemistry, University of Louisville, Louisville, KY 40202, USA; (J.W.); (A.C.B.); (P.K.L.)
| | - Jin Lian Tan
- Department of Medicine, University of Louisville, Louisville, KY 40202, USA;
| | - Min Wu
- Seahorse Bioscience, Billerica, MA 01862, USA
| | - Richard M. Higashi
- Center for Environmental and Systems Biochemistry, Department Toxicology & Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA; (A.A.-A.); (R.M.H.); (A.N.L.)
| | - Andrew N. Lane
- Center for Environmental and Systems Biochemistry, Department Toxicology & Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA; (A.A.-A.); (R.M.H.); (A.N.L.)
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3
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Radenkovic S, Ligezka AN, Mokashi SS, Driesen K, Dukes-Rimsky L, Preston G, Owuocha LF, Sabbagh L, Mousa J, Lam C, Edmondson A, Larson A, Schultz M, Vermeersch P, Cassiman D, Witters P, Beamer LJ, Kozicz T, Flanagan-Steet H, Ghesquière B, Morava E. Tracer metabolomics reveals the role of aldose reductase in glycosylation. Cell Rep Med 2023; 4:101056. [PMID: 37257447 PMCID: PMC10313913 DOI: 10.1016/j.xcrm.2023.101056] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 03/14/2023] [Accepted: 05/04/2023] [Indexed: 06/02/2023]
Abstract
Abnormal polyol metabolism is predominantly associated with diabetes, where excess glucose is converted to sorbitol by aldose reductase (AR). Recently, abnormal polyol metabolism has been implicated in phosphomannomutase 2 congenital disorder of glycosylation (PMM2-CDG) and an AR inhibitor, epalrestat, proposed as a potential therapy. Considering that the PMM2 enzyme is not directly involved in polyol metabolism, the increased polyol production and epalrestat's therapeutic mechanism in PMM2-CDG remained elusive. PMM2-CDG, caused by PMM2 deficiency, presents with depleted GDP-mannose and abnormal glycosylation. Here, we show that, apart from glycosylation abnormalities, PMM2 deficiency affects intracellular glucose flux, resulting in polyol increase. Targeting AR with epalrestat decreases polyols and increases GDP-mannose both in patient-derived fibroblasts and in pmm2 mutant zebrafish. Using tracer studies, we demonstrate that AR inhibition diverts glucose flux away from polyol production toward the synthesis of sugar nucleotides, and ultimately glycosylation. Finally, PMM2-CDG individuals treated with epalrestat show a clinical and biochemical improvement.
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Affiliation(s)
- Silvia Radenkovic
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA; Metabolomics Expertise Center, Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory of Applied Mass Spectrometry, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium; Laboratory of Hepatology, Department of CHROMETA, KU Leuven, 3000 Leuven, Belgium.
| | - Anna N Ligezka
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA; Department of Medical Diagnostics, Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland
| | - Sneha S Mokashi
- JC Self Research Institute, Greenwood Genetic Center, Greenwood, SC 29646, USA
| | - Karen Driesen
- Metabolomics Expertise Center, Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory of Applied Mass Spectrometry, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium; Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Lynn Dukes-Rimsky
- JC Self Research Institute, Greenwood Genetic Center, Greenwood, SC 29646, USA
| | - Graeme Preston
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA
| | - Luckio F Owuocha
- Department of Biochemistry, 117 Schweitzer Hall, University of Missouri, Columbia, MO 65211, USA
| | - Leila Sabbagh
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA
| | - Jehan Mousa
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA
| | - Christina Lam
- Division of Genetic Medicine, Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA; Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - Andrew Edmondson
- Section of Biochemical Genetics, Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Austin Larson
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Matthew Schultz
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | | | - David Cassiman
- Laboratory of Hepatology, Department of CHROMETA, KU Leuven, 3000 Leuven, Belgium; Metabolic Center, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Peter Witters
- Metabolic Center, University Hospitals Leuven, 3000 Leuven, Belgium; Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Lesa J Beamer
- Department of Biochemistry, 117 Schweitzer Hall, University of Missouri, Columbia, MO 65211, USA
| | - Tamas Kozicz
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA; Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA; Department of Anatomy and Department of Genetics, University of Pecs Medical School, Pecs, Hungary
| | | | - Bart Ghesquière
- Metabolomics Expertise Center, Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory of Applied Mass Spectrometry, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Eva Morava
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA; Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA; Metabolic Center, University Hospitals Leuven, 3000 Leuven, Belgium; Department of Anatomy and Department of Genetics, University of Pecs Medical School, Pecs, Hungary.
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4
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Zhang X, Su Y, Lane AN, Stromberg AJ, Fan TWM, Wang C. Bayesian kinetic modeling for tracer-based metabolomic data. BMC Bioinformatics 2023; 24:108. [PMID: 36949395 PMCID: PMC10035190 DOI: 10.1186/s12859-023-05211-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 02/24/2023] [Indexed: 03/24/2023] Open
Abstract
BACKGROUND Stable Isotope Resolved Metabolomics (SIRM) is a new biological approach that uses stable isotope tracers such as uniformly [Formula: see text]-enriched glucose ([Formula: see text]-Glc) to trace metabolic pathways or networks at the atomic level in complex biological systems. Non-steady-state kinetic modeling based on SIRM data uses sets of simultaneous ordinary differential equations (ODEs) to quantitatively characterize the dynamic behavior of metabolic networks. It has been increasingly used to understand the regulation of normal metabolism and dysregulation in the development of diseases. However, fitting a kinetic model is challenging because there are usually multiple sets of parameter values that fit the data equally well, especially for large-scale kinetic models. In addition, there is a lack of statistically rigorous methods to compare kinetic model parameters between different experimental groups. RESULTS We propose a new Bayesian statistical framework to enhance parameter estimation and hypothesis testing for non-steady-state kinetic modeling of SIRM data. For estimating kinetic model parameters, we leverage the prior distribution not only to allow incorporation of experts' knowledge but also to provide robust parameter estimation. We also introduce a shrinkage approach for borrowing information across the ensemble of metabolites to stably estimate the variance of an individual isotopomer. In addition, we use a component-wise adaptive Metropolis algorithm with delayed rejection to perform efficient Monte Carlo sampling of the posterior distribution over high-dimensional parameter space. For comparing kinetic model parameters between experimental groups, we propose a new reparameterization method that converts the complex hypothesis testing problem into a more tractable parameter estimation problem. We also propose an inference procedure based on credible interval and credible value. Our method is freely available for academic use at https://github.com/xuzhang0131/MCMCFlux . CONCLUSIONS Our new Bayesian framework provides robust estimation of kinetic model parameters and enables rigorous comparison of model parameters between experimental groups. Simulation studies and application to a lung cancer study demonstrate that our framework performs well for non-steady-state kinetic modeling of SIRM data.
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Affiliation(s)
- Xu Zhang
- Dr. Bing Zhang Department of Statistics, University of Kentucky, Lexington, 40536, USA.
| | - Ya Su
- Department of Statistical Sciences and Operations Research, Virginia Commonwealth University, Richmond, 23220, USA
| | - Andrew N Lane
- Markey Cancer Center, University of Kentucky, Lexington, 40536, USA
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, 40536, USA
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, 40536, USA
| | - Arnold J Stromberg
- Dr. Bing Zhang Department of Statistics, University of Kentucky, Lexington, 40536, USA
| | - Teresa W M Fan
- Markey Cancer Center, University of Kentucky, Lexington, 40536, USA
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, 40536, USA
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, 40536, USA
| | - Chi Wang
- Dr. Bing Zhang Department of Statistics, University of Kentucky, Lexington, 40536, USA.
- Markey Cancer Center, University of Kentucky, Lexington, 40536, USA.
- Division of Cancer Biostatistics, Department of Internal Medicine, University of Kentucky, Lexington, 40536, USA.
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5
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Fan TWM, Sun Q, Higashi RM. Ultrahigh resolution MS 1/MS 2-based reconstruction of metabolic networks in mammalian cells reveals changes for selenite and arsenite action. J Biol Chem 2022; 298:102586. [PMID: 36223837 PMCID: PMC9667311 DOI: 10.1016/j.jbc.2022.102586] [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: 06/26/2022] [Revised: 10/03/2022] [Accepted: 10/05/2022] [Indexed: 11/13/2022] Open
Abstract
Metabolic networks are complex, intersecting, and composed of numerous enzyme-catalyzed biochemical reactions that transfer various molecular moieties among metabolites. Thus, robust reconstruction of metabolic networks requires metabolite moieties to be tracked, which cannot be readily achieved with mass spectrometry (MS) alone. We previously developed an Ion Chromatography-ultrahigh resolution-MS1/data independent-MS2 method to track the simultaneous incorporation of the heavy isotopes 13C and 15N into the moieties of purine/pyrimidine nucleotides in mammalian cells. Ultrahigh resolution-MS1 resolves and counts multiple tracer atoms in intact metabolites, while data independent-tandem MS (MS2) determines isotopic enrichment in their moieties without concern for the numerous mass isotopologue source ions to be fragmented. Together, they enabled rigorous MS-based reconstruction of metabolic networks at specific enzyme levels. We have expanded this approach to trace the labeled atom fate of [13C6]-glucose in 3D A549 spheroids in response to the anticancer agent selenite and that of [13C5,15N2]-glutamine in 2D BEAS-2B cells in response to arsenite transformation. We deduced altered activities of specific enzymes in the Krebs cycle, pentose phosphate pathway, gluconeogenesis, and UDP-GlcNAc synthesis pathways elicited by the stressors. These metabolic details help elucidate the resistance mechanism of 3D versus 2D A549 cultures to selenite and metabolic reprogramming that can mediate the transformation of BEAS-2B cells by arsenite.
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Affiliation(s)
- Teresa W-M Fan
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, Kentucky, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA.
| | - Qiushi Sun
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, Kentucky, USA
| | - Richard M Higashi
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, Kentucky, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
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Lackner M, Neef SK, Winter S, Beer-Hammer S, Nürnberg B, Schwab M, Hofmann U, Haag M. Untargeted stable isotope-resolved metabolomics to assess the effect of PI3Kβ inhibition on metabolic pathway activities in a PTEN null breast cancer cell line. Front Mol Biosci 2022; 9:1004602. [PMID: 36310598 PMCID: PMC9614656 DOI: 10.3389/fmolb.2022.1004602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 09/28/2022] [Indexed: 11/17/2022] Open
Abstract
The combination of high-resolution LC-MS untargeted metabolomics with stable isotope-resolved tracing is a promising approach for the global exploration of metabolic pathway activities. In our established workflow we combine targeted isotopologue feature extraction with the non-targeted X13CMS routine. Metabolites, detected by X13CMS as differentially labeled between two biological conditions are subsequently integrated into the original targeted library. This strategy enables monitoring of changes in known pathways as well as the discovery of hitherto unknown metabolic alterations. Here, we demonstrate this workflow in a PTEN (phosphatase and tensin homolog) null breast cancer cell line (MDA-MB-468) exploring metabolic pathway activities in the absence and presence of the selective PI3Kβ inhibitor AZD8186. Cells were fed with [U-13C] glucose and treated for 1, 3, 6, and 24 h with 0.5 µM AZD8186 or vehicle, extracted by an optimized sample preparation protocol and analyzed by LC-QTOF-MS. Untargeted differential tracing of labels revealed 286 isotope-enriched features that were significantly altered between control and treatment conditions, of which 19 features could be attributed to known compounds from targeted pathways. Other 11 features were unambiguously identified based on data-dependent MS/MS spectra and reference substances. Notably, only a minority of the significantly altered features (11 and 16, respectively) were identified when preprocessing of the same data set (treatment vs. control in 24 h unlabeled samples) was performed with tools commonly used for label-free (i.e. w/o isotopic tracer) non-targeted metabolomics experiments (Profinder´s batch recursive feature extraction and XCMS). The structurally identified metabolites were integrated into the existing targeted isotopologue feature extraction workflow to enable natural abundance correction, evaluation of assay performance and assessment of drug-induced changes in pathway activities. Label incorporation was highly reproducible for the majority of isotopologues in technical replicates with a RSD below 10%. Furthermore, inter-day repeatability of a second label experiment showed strong correlation (Pearson R2 > 0.99) between tracer incorporation on different days. Finally, we could identify prominent pathway activity alterations upon PI3Kβ inhibition. Besides pathways in central metabolism, known to be changed our workflow revealed additional pathways, like pyrimidine metabolism or hexosamine pathway. All pathways identified represent key metabolic processes associated with cancer metabolism and therapy.
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Affiliation(s)
- Marcel Lackner
- Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
| | - Sylvia K. Neef
- Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
| | - Stefan Winter
- Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
| | - Sandra Beer-Hammer
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute for Experimental and Clinical Pharmacology and Pharmacogenomics, Interfaculty Center for Pharmacogenomics and Drug Research (ICePhA), University of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180), Image-Guided and Functionally Instructed Tumor Therapies, University of Tübingen, Tübingen, Germany
| | - Bernd Nürnberg
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute for Experimental and Clinical Pharmacology and Pharmacogenomics, Interfaculty Center for Pharmacogenomics and Drug Research (ICePhA), University of Tübingen, Tübingen, Germany
| | - Matthias Schwab
- Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180), Image-Guided and Functionally Instructed Tumor Therapies, University of Tübingen, Tübingen, Germany
- Departments of Clinical Pharmacology and of Pharmacy and Biochemistry, University of Tübingen, Tübingen, Germany
| | - Ute Hofmann
- Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
| | - Mathias Haag
- Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
- *Correspondence: Mathias Haag,
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Lin P, W-M Fan T, Lane AN. NMR-based isotope editing, chemoselection and isotopomer distribution analysis in stable isotope resolved metabolomics. Methods 2022; 206:8-17. [PMID: 35908585 PMCID: PMC9539636 DOI: 10.1016/j.ymeth.2022.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/18/2022] [Accepted: 07/25/2022] [Indexed: 11/20/2022] Open
Abstract
NMR is a very powerful tool for identifying and quantifying compounds within complex mixtures without the need for individual standards or chromatographic separation. Stable Isotope Resolved Metabolomics (or SIRM) is an approach to following the fate of individual atoms from precursors through metabolic transformation, producing an atom-resolved metabolic fate map. However, extracts of cells or tissue give rise to very complex NMR spectra. While multidimensional NMR experiments may partially overcome the spectral overlap problem, additional tools may be needed to determine site-specific isotopomer distributions. NMR is especially powerful by virtue of its isotope editing capabilities using NMR active nuclei such as 13C, 15N, 19F and 31P to select molecules containing just these atoms in a complex mixture, and provide direct information about which atoms are present in identified compounds and their relative abundances. The isotope-editing capability of NMR can also be employed to select for those compounds that have been selectively derivatized with an NMR-active stable isotope at particular functional groups, leading to considerable spectral simplification. Here we review isotope analysis by NMR, and methods of chemoselection both for spectral simplification, and for enhanced isotopomer analysis.
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Affiliation(s)
- Penghui Lin
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY 40536, USA
| | - Teresa W-M Fan
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40536, USA
| | - Andrew N Lane
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40536, USA.
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8
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Flight RM, Mitchell JM, Moseley HNB. Scan-Centric, Frequency-Based Method for Characterizing Peaks from Direct Injection Fourier Transform Mass Spectrometry Experiments. Metabolites 2022; 12:metabo12060515. [PMID: 35736448 PMCID: PMC9228344 DOI: 10.3390/metabo12060515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 05/20/2022] [Accepted: 05/30/2022] [Indexed: 11/16/2022] Open
Abstract
We present a novel, scan-centric method for characterizing peaks from direct injection multi-scan Fourier transform mass spectra of complex samples that utilizes frequency values derived directly from the spacing of raw m/z points in spectral scans. Our peak characterization method utilizes intensity-independent noise removal and normalization of scan-level data to provide a much better fit of relative intensity to natural abundance probabilities for low abundance isotopologues that are not present in all of the acquired scans. Moreover, our method calculates both peak- and scan-specific statistics incorporated within a series of quality control steps that are designed to robustly derive peak centers, intensities, and intensity ratios with their scan-level variances. These cross-scan characterized peaks are suitable for use in our previously published peak assignment methodology, Small Molecule Isotope Resolved Formula Enumeration (SMIRFE).
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Affiliation(s)
- Robert M. Flight
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; (R.M.F.); (J.M.M.)
- Department of Molecular & Cellular Biochemistry, University of Kentucky, Lexington, KY 40536, USA
- Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY 40536, USA
| | - Joshua M. Mitchell
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; (R.M.F.); (J.M.M.)
- Department of Molecular & Cellular Biochemistry, University of Kentucky, Lexington, KY 40536, USA
- Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY 40536, USA
| | - Hunter N. B. Moseley
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; (R.M.F.); (J.M.M.)
- Department of Molecular & Cellular Biochemistry, University of Kentucky, Lexington, KY 40536, USA
- Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY 40536, USA
- Institute for Biomedical Informatics, University of Kentucky, Lexington, KY 40536, USA
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40536, USA
- Correspondence:
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9
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Campbell S, Mesaros C, Izzo L, Affronti H, Noji M, Schaffer BE, Tsang T, Sun K, Trefely S, Kruijning S, Blenis J, Blair IA, Wellen KE. Glutamine deprivation triggers NAGK-dependent hexosamine salvage. eLife 2021; 10:e62644. [PMID: 34844667 PMCID: PMC8631944 DOI: 10.7554/elife.62644] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 07/02/2021] [Indexed: 12/16/2022] Open
Abstract
Tumors frequently exhibit aberrant glycosylation, which can impact cancer progression and therapeutic responses. The hexosamine biosynthesis pathway (HBP) produces uridine diphosphate N-acetylglucosamine (UDP-GlcNAc), a major substrate for glycosylation in the cell. Prior studies have identified the HBP as a promising therapeutic target in pancreatic ductal adenocarcinoma (PDA). The HBP requires both glucose and glutamine for its initiation. The PDA tumor microenvironment is nutrient poor, however, prompting us to investigate how nutrient limitation impacts hexosamine synthesis. Here, we identify that glutamine limitation in PDA cells suppresses de novo hexosamine synthesis but results in increased free GlcNAc abundance. GlcNAc salvage via N-acetylglucosamine kinase (NAGK) is engaged to feed UDP-GlcNAc pools. NAGK expression is elevated in human PDA, and NAGK deletion from PDA cells impairs tumor growth in mice. Together, these data identify an important role for NAGK-dependent hexosamine salvage in supporting PDA tumor growth.
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Affiliation(s)
- Sydney Campbell
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
| | - Clementina Mesaros
- Department of Systems Pharmacology and Translational Therapeutics, University of PennsylvaniaPhiladelphiaUnited States
| | - Luke Izzo
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
| | - Hayley Affronti
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
| | - Michael Noji
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
| | - Bethany E Schaffer
- Meyer Cancer Center and Department of Pharmacology, Weill Cornell MedicineNew YorkUnited States
| | - Tiffany Tsang
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
| | - Kathryn Sun
- Pancreatic Cancer Research Center, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Sophie Trefely
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
- Center for Metabolic Disease Research, Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple UniversityPhiladelphiaUnited States
| | - Salisa Kruijning
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
| | - John Blenis
- Meyer Cancer Center and Department of Pharmacology, Weill Cornell MedicineNew YorkUnited States
| | - Ian A Blair
- Department of Systems Pharmacology and Translational Therapeutics, University of PennsylvaniaPhiladelphiaUnited States
| | - Kathryn E Wellen
- Department of Cancer Biology, University of PennsylvaniaPhiladelphiaUnited States
- Abramson Family Cancer Research Institute, University of PennsylvaniaPhiladelphiaUnited States
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10
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Brain glycogen serves as a critical glucosamine cache required for protein glycosylation. Cell Metab 2021; 33:1404-1417.e9. [PMID: 34043942 PMCID: PMC8266748 DOI: 10.1016/j.cmet.2021.05.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/02/2021] [Accepted: 05/03/2021] [Indexed: 02/08/2023]
Abstract
Glycosylation defects are a hallmark of many nervous system diseases. However, the molecular and metabolic basis for this pathology is not fully understood. In this study, we found that N-linked protein glycosylation in the brain is metabolically channeled to glucosamine metabolism through glycogenolysis. We discovered that glucosamine is an abundant constituent of brain glycogen, which functions as a glucosamine reservoir for multiple glycoconjugates. We demonstrated the enzymatic incorporation of glucosamine into glycogen by glycogen synthase, and the release by glycogen phosphorylase by biochemical and structural methodologies, in primary astrocytes, and in vivo by isotopic tracing and mass spectrometry. Using two mouse models of glycogen storage diseases, we showed that disruption of brain glycogen metabolism causes global decreases in free pools of UDP-N-acetylglucosamine and N-linked protein glycosylation. These findings revealed fundamental biological roles of brain glycogen in protein glycosylation with direct relevance to multiple human diseases of the central nervous system.
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11
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Zhang Y, Gao B, Valdiviez L, Zhu C, Gallagher T, Whiteson K, Fiehn O. Comparing Stable Isotope Enrichment by Gas Chromatography with Time-of-Flight, Quadrupole Time-of-Flight, and Quadrupole Mass Spectrometry. Anal Chem 2021; 93:2174-2182. [PMID: 33434014 PMCID: PMC10782559 DOI: 10.1021/acs.analchem.0c04013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Stable isotope tracers are applied for in vivo and in vitro studies to reveal the activity of enzymes and intracellular metabolic pathways. Most often, such tracers are used with gas chromatography coupled to mass spectrometry (GC-MS) owing to its ease of operation and reproducible mass spectral databases. Differences in isotope tracer performance of the classic GC-quadrupole MS instrument and newer time-of-flight instruments are not well studied. Here, we used three commercially available instruments for the analysis of identical samples from a stable isotope labeling study that used [U-13C6] d-glucose to investigate the metabolism of the bacterium Rothia mucilaginosa with respect to 29 amino acids and hydroxyl acids involved in primary metabolism. The prokaryote R. mucilaginosa belongs to the family of Micrococcaceae and is present and metabolically active in the airways and sputum of cystic fibrosis patients. Overall, all three GC-MS instruments (low-resolution GC-SQ MS, low-resolution GC-TOF MS, and high-resolution GC-QTOF MS) can be used to perform stable isotope tracing studies for glycolytic intermediates, tricarboxylic acid (TCA) metabolites, and amino acids, yielding similar biological results, with high-resolution GC-QTOF MS offering additional capabilities to identify the chemical structures of unknown compounds that might show significant isotope enrichments in biological studies.
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Affiliation(s)
- Ying Zhang
- West Coast Metabolomics Center, University of California, Davis, 95616, CA, USA
- Department of Chemistry, University of California, Davis, 95616, CA, USA
| | - Bei Gao
- Department of Medicine, University of California, San Diego, San Diego, 92093, CA, USA
- School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Luis Valdiviez
- West Coast Metabolomics Center, University of California, Davis, 95616, CA, USA
| | - Chao Zhu
- College of Medicine & Nursing, Dezhou University, De Zhou, Shandong, 253023, China
| | - Tara Gallagher
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Katrine Whiteson
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Oliver Fiehn
- West Coast Metabolomics Center, University of California, Davis, 95616, CA, USA
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12
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Ma J, Wu C, Hart GW. Analytical and Biochemical Perspectives of Protein O-GlcNAcylation. Chem Rev 2021; 121:1513-1581. [DOI: 10.1021/acs.chemrev.0c00884] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Junfeng Ma
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Georgetown University, Washington D.C. 20057, United States
| | - Ci Wu
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Georgetown University, Washington D.C. 20057, United States
| | - Gerald W. Hart
- Department of Biochemistry and Molecular Biology, Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602, United States
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13
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Atom Identifiers Generated by a Neighborhood-Specific Graph Coloring Method Enable Compound Harmonization across Metabolic Databases. Metabolites 2020; 10:metabo10090368. [PMID: 32933023 PMCID: PMC7570338 DOI: 10.3390/metabo10090368] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 02/06/2023] Open
Abstract
Metabolic flux analysis requires both a reliable metabolic model and reliable metabolic profiles in characterizing metabolic reprogramming. Advances in analytic methodologies enable production of high-quality metabolomics datasets capturing isotopic flux. However, useful metabolic models can be difficult to derive due to the lack of relatively complete atom-resolved metabolic networks for a variety of organisms, including human. Here, we developed a neighborhood-specific graph coloring method that creates unique identifiers for each atom in a compound facilitating construction of an atom-resolved metabolic network. What is more, this method is guaranteed to generate the same identifier for symmetric atoms, enabling automatic identification of possible additional mappings caused by molecular symmetry. Furthermore, a compound coloring identifier derived from the corresponding atom coloring identifiers can be used for compound harmonization across various metabolic network databases, which is an essential first step in network integration. With the compound coloring identifiers, 8865 correspondences between KEGG (Kyoto Encyclopedia of Genes and Genomes) and MetaCyc compounds are detected, with 5451 of them confirmed by other identifiers provided by the two databases. In addition, we found that the Enzyme Commission numbers (EC) of reactions can be used to validate possible correspondence pairs, with 1848 unconfirmed pairs validated by commonality in reaction ECs. Moreover, we were able to detect various issues and errors with compound representation in KEGG and MetaCyc databases by compound coloring identifiers, demonstrating the usefulness of this methodology for database curation.
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14
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Zhong Y, Mohan K, Liu J, Al-Attar A, Lin P, Flight RM, Sun Q, Warmoes MO, Deshpande RR, Liu H, Jung KS, Mitov MI, Lin N, Butterfield DA, Lu S, Liu J, Moseley HNB, Fan TWM, Kleinman ME, Wang QJ. Loss of CLN3, the gene mutated in juvenile neuronal ceroid lipofuscinosis, leads to metabolic impairment and autophagy induction in retinal pigment epithelium. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165883. [PMID: 32592935 DOI: 10.1016/j.bbadis.2020.165883] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 06/08/2020] [Accepted: 06/16/2020] [Indexed: 12/13/2022]
Abstract
Juvenile neuronal ceroid lipofuscinosis (JNCL, aka. juvenile Batten disease or CLN3 disease) is a lysosomal storage disease characterized by progressive blindness, seizures, cognitive and motor failures, and premature death. JNCL is caused by mutations in the Ceroid Lipofuscinosis, Neuronal 3 (CLN3) gene, whose function is unclear. Although traditionally considered a neurodegenerative disease, CLN3 disease displays eye-specific effects: Vision loss not only is often one of the earliest symptoms of JNCL, but also has been reported in non-syndromic CLN3 disease. Here we described the roles of CLN3 protein in maintaining healthy retinal pigment epithelium (RPE) and normal vision. Using electroretinogram, fundoscopy and microscopy, we showed impaired visual function, retinal autofluorescent lesions, and RPE disintegration and metaplasia/hyperplasia in a Cln3 ~ 1 kb-deletion mouse model [1] on C57BL/6J background. Utilizing a combination of biochemical analyses, RNA-Seq, Seahorse XF bioenergetic analysis, and Stable Isotope Resolved Metabolomics (SIRM), we further demonstrated that loss of CLN3 increased autophagic flux, suppressed mTORC1 and Akt activities, enhanced AMPK activity, and up-regulated gene expression of the autophagy-lysosomal system in RPE-1 cells, suggesting autophagy induction. This CLN3 deficiency induced autophagy induction coincided with decreased mitochondrial oxygen consumption, glycolysis, the tricarboxylic acid (TCA) cycle, and ATP production. We also reported for the first time that loss of CLN3 led to glycogen accumulation despite of impaired glycogen synthesis. Our comprehensive analyses shed light on how loss of CLN3 affect autophagy and metabolism. This work suggests possible links among metabolic impairment, autophagy induction and lysosomal storage, as well as between RPE atrophy/degeneration and vision loss in JNCL.
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Affiliation(s)
- Yu Zhong
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Kabhilan Mohan
- Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, KY, United States
| | - Jinpeng Liu
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States
| | - Ahmad Al-Attar
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Penghui Lin
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Robert M Flight
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States; Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Qiushi Sun
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Marc O Warmoes
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Rahul R Deshpande
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Huijuan Liu
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Kyung Sik Jung
- Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, KY, United States
| | - Mihail I Mitov
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States
| | | | - D Allan Butterfield
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States; Department of Chemistry, University of Kentucky, Lexington, KY, United States
| | - Shuyan Lu
- Pfizer Inc., San Diego, CA, United States
| | - Jinze Liu
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States; Department of Computer Science, University of Kentucky, Lexington, KY, United States; Institute for Biomedical Informatics, University of Kentucky, Lexington, KY, United States
| | - Hunter N B Moseley
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States; Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, United States; Institute for Biomedical Informatics, University of Kentucky, Lexington, KY, United States
| | - Teresa W M Fan
- Markey Cancer Center, University of Kentucky, Lexington, KY, United States; Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, United States; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, United States
| | - Mark E Kleinman
- Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, KY, United States
| | - Qing Jun Wang
- Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, KY, United States; Markey Cancer Center, University of Kentucky, Lexington, KY, United States.
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15
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Robust Moiety Model Selection Using Mass Spectrometry Measured Isotopologues. Metabolites 2020; 10:metabo10030118. [PMID: 32245221 PMCID: PMC7143054 DOI: 10.3390/metabo10030118] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/14/2020] [Accepted: 03/19/2020] [Indexed: 11/18/2022] Open
Abstract
Stable isotope resolved metabolomics (SIRM) experiments use stable isotope tracers to provide superior metabolomics datasets for metabolic flux analysis and metabolic modeling. Since assumptions of model correctness can seriously compromise interpretation of metabolic flux results, we have developed a metabolic modeling software package specifically designed for moiety model comparison and selection based on the metabolomics data provided. Here, we tested the effectiveness of model selection with two time-series mass spectrometry (MS) isotopologue datasets for uridine diphosphate N-acetyl-d-glucosamine (UDP-GlcNAc) generated from different platforms utilizing direct infusion nanoelectrospray and liquid chromatography. Analysis results demonstrate the robustness of our model selection methods by the successful selection of the optimal model from over 40 models provided. Moreover, the effects of specific optimization methods, degree of optimization, selection criteria, and specific objective functions on model selection are illustrated. Overall, these results indicate that over-optimization can lead to model selection failure, but combining multiple datasets can help control this overfitting effect. The implication is that SIRM datasets in public repositories of reasonable quality can be combined with newly acquired datasets to improve model selection. Furthermore, curation efforts of public metabolomics repositories to maintain high data quality could have a huge impact on future metabolic modeling efforts.
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16
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Sun Q, Fan TWM, Lane AN, Higashi RM. Applications of Chromatography-Ultra High-Resolution MS for Stable Isotope-Resolved Metabolomics (SIRM) Reconstruction of Metabolic Networks. Trends Analyt Chem 2020; 123:115676. [PMID: 32483395 PMCID: PMC7263348 DOI: 10.1016/j.trac.2019.115676] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metabolism is a complex network of compartmentalized and coupled chemical reactions, which often involve transfers of substructures of biomolecules, thus requiring metabolite substructures to be tracked. Stable isotope resolved metabolomics (SIRM) enables pathways reconstruction, even among chemically identical metabolites, by tracking the provenance of stable isotope-labeled substructures using NMR and ultrahigh resolution (UHR) MS. The latter can resolve and count isotopic labels in metabolites and can identify isotopic enrichment in substructures when operated in tandem MS mode. However, MS2 is difficult to implement with chromatography-based UHR-MS due to lengthy MS1 acquisition time that is required to obtain the molecular isotopologue count, which is further exacerbated by the numerous isotopologue source ions to fragment. We review here recent developments in tandem MS applications of SIRM to obtain more detailed information about isotopologue distributions in metabolites and their substructures.
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Affiliation(s)
- Qiushi Sun
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, KY, 40539, USA
| | - Teresa W-M. Fan
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, KY, 40539, USA
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA
- Markey Cancer Center, University of Kentucky, Lexington, KY, 40539, USA
| | - Andrew N. Lane
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, KY, 40539, USA
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA
- Markey Cancer Center, University of Kentucky, Lexington, KY, 40539, USA
| | - Richard M. Higashi
- Center for Environmental and Systems Biochemistry (CESB), University of Kentucky, Lexington, KY, 40539, USA
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA
- Markey Cancer Center, University of Kentucky, Lexington, KY, 40539, USA
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17
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Jin H, Moseley HNB. Moiety modeling framework for deriving moiety abundances from mass spectrometry measured isotopologues. BMC Bioinformatics 2019; 20:524. [PMID: 31660850 PMCID: PMC6816163 DOI: 10.1186/s12859-019-3096-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 09/10/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Stable isotope tracing can follow individual atoms through metabolic transformations through the detection of the incorporation of stable isotope within metabolites. This resulting data can be interpreted in terms related to metabolic flux. However, detection of a stable isotope in metabolites by mass spectrometry produces a profile of isotopologue peaks that requires deconvolution to ascertain the localization of isotope incorporation. RESULTS To aid the interpretation of the mass spectroscopy isotopologue profile, we have developed a moiety modeling framework for deconvoluting metabolite isotopologue profiles involving single and multiple isotope tracers. This moiety modeling framework provides facilities for moiety model representation, moiety model optimization, and moiety model selection. The moiety_modeling package was developed from the idea of metabolite decomposition into moiety units based on metabolic transformations, i.e. a moiety model. The SAGA-optimize package, solving a boundary-value inverse problem through a combined simulated annealing and genetic algorithm, was developed for model optimization. Additional optimization methods from the Python scipy library are utilized as well. Several forms of the Akaike information criterion and Bayesian information criterion are provided for selecting between moiety models. Moiety models and associated isotopologue data are defined in a JSONized format. By testing the moiety modeling framework on the timecourses of 13C isotopologue data for uridine diphosphate N-acetyl-D-glucosamine (UDP-GlcNAc) in human prostate cancer LnCaP-LN3 cells, we were able to confirm its robust performance in isotopologue deconvolution and moiety model selection. CONCLUSIONS SAGA-optimize is a useful Python package for solving boundary-value inverse problems, and the moiety_modeling package is an easy-to-use tool for mass spectroscopy isotopologue profile deconvolution involving single and multiple isotope tracers. Both packages are freely available on GitHub and via the Python Package Index.
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Affiliation(s)
- Huan Jin
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - Hunter N B Moseley
- Department of Molecular & Cellular Biochemistry, University of Kentucky, Lexington, KY, USA. .,Markey Cancer Center, University of Kentucky, Lexington, KY, USA. .,Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA. .,Institute for Biomedical Informatics, University of Kentucky, Lexington, KY, USA.
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18
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Lorkiewicz PK, Gibb AA, Rood BR, He L, Zheng Y, Clem BF, Zhang X, Hill BG. Integration of flux measurements and pharmacological controls to optimize stable isotope-resolved metabolomics workflows and interpretation. Sci Rep 2019; 9:13705. [PMID: 31548575 PMCID: PMC6757038 DOI: 10.1038/s41598-019-50183-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 09/02/2019] [Indexed: 11/29/2022] Open
Abstract
Stable isotope-resolved metabolomics (SIRM) provides information regarding the relative activity of numerous metabolic pathways and the contribution of nutrients to specific metabolite pools; however, SIRM experiments can be difficult to execute, and data interpretation is challenging. Furthermore, standardization of analytical procedures and workflows remain significant obstacles for widespread reproducibility. Here, we demonstrate the workflow of a typical SIRM experiment and suggest experimental controls and measures of cross-validation that improve data interpretation. Inhibitors of glycolysis and oxidative phosphorylation as well as mitochondrial uncouplers serve as pharmacological controls, which help define metabolic flux configurations that occur under well-controlled metabolic states. We demonstrate how such controls and time course labeling experiments improve confidence in metabolite assignments as well as delineate metabolic pathway relationships. Moreover, we demonstrate how radiolabeled tracers and extracellular flux analyses integrate with SIRM to improve data interpretation. Collectively, these results show how integration of flux methodologies and use of pharmacological controls increase confidence in SIRM data and provide new biological insights.
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Affiliation(s)
- Pawel K Lorkiewicz
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, USA
- Department of Chemistry, Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, USA
| | - Andrew A Gibb
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, USA
- Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Benjamin R Rood
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, USA
| | - Liqing He
- Department of Chemistry, Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, USA
| | - Yuting Zheng
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, USA
| | - Brian F Clem
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, KY, USA
| | - Xiang Zhang
- Department of Chemistry, Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, USA
| | - Bradford G Hill
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, USA.
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19
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Beyß M, Azzouzi S, Weitzel M, Wiechert W, Nöh K. The Design of FluxML: A Universal Modeling Language for 13C Metabolic Flux Analysis. Front Microbiol 2019; 10:1022. [PMID: 31178829 PMCID: PMC6543931 DOI: 10.3389/fmicb.2019.01022] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 04/24/2019] [Indexed: 12/16/2022] Open
Abstract
13C metabolic flux analysis (MFA) is the method of choice when a detailed inference of intracellular metabolic fluxes in living organisms under metabolic quasi-steady state conditions is desired. Being continuously developed since two decades, the technology made major contributions to the quantitative characterization of organisms in all fields of biotechnology and health-related research. 13C MFA, however, stands out from other "-omics sciences," in that it requires not only experimental-analytical data, but also mathematical models and a computational toolset to infer the quantities of interest, i.e., the metabolic fluxes. At present, these models cannot be conveniently exchanged between different labs. Here, we present the implementation-independent model description language FluxML for specifying 13C MFA models. The core of FluxML captures the metabolic reaction network together with atom mappings, constraints on the model parameters, and the wealth of data configurations. In particular, we describe the governing design processes that shaped the FluxML language. We demonstrate the utility of FluxML to represent many contemporary experimental-analytical requirements in the field of 13C MFA. The major aim of FluxML is to offer a sound, open, and future-proof language to unambiguously express and conserve all the necessary information for model re-use, exchange, and comparison. Along with FluxML, several powerful computational tools are supplied for easy handling, but also to maintain a maximum of flexibility. Altogether, the FluxML collection is an "all-around carefree package" for 13C MFA modelers. We believe that FluxML improves scientific productivity as well as transparency and therewith contributes to the efficiency and reproducibility of computational modeling efforts in the field of 13C MFA.
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Affiliation(s)
- Martin Beyß
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Salah Azzouzi
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Michael Weitzel
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Wolfgang Wiechert
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Computational Systems Biotechnology (AVT.CSB), RWTH Aachen University, Aachen, Germany
| | - Katharina Nöh
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
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20
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Zeng J, Wang Z, Huang X, Eckstein SS, Lin X, Piao H, Weigert C, Yin P, Lehmann R, Xu G. Comprehensive Profiling by Non-targeted Stable Isotope Tracing Capillary Electrophoresis-Mass Spectrometry: A New Tool Complementing Metabolomic Analyses of Polar Metabolites. Chemistry 2019; 25:5427-5432. [PMID: 30810245 DOI: 10.1002/chem.201900539] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Indexed: 01/25/2023]
Abstract
Mass spectrometry (MS) driven metabolomics is a frequently used tool in various areas of life sciences; however, the analysis of polar metabolites is less commonly included. In general, metabolomic analyses lead to the detection of the total amount of all covered metabolites. This is currently a major limitation with respect to metabolites showing high turnover rates, but no changes in their concentration. Such metabolites and pathways could be crucial metabolic nodes (e.g., potential drug targets in cancer metabolism). A stable-isotope tracing capillary electrophoresis-mass spectrometry (CE-MS) metabolomic approach was developed to cover both polar metabolites and isotopologues in a non-targeted way. An in-house developed software enables high throughput processing of complex multidimensional data. The practicability is demonstrated analyzing [U-13 C]-glucose exposed prostate cancer and non-cancer cells. This CE-MS-driven analytical strategy complements polar metabolite profiles through isotopologue labeling patterns, thereby improving not only the metabolomic coverage, but also the understanding of metabolism.
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Affiliation(s)
- Jun Zeng
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhichao Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Huang
- Department of Computer Science & Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Sabine S Eckstein
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, 72076, Tübingen, Germany.,Core Facility German Center for Diabetes Research (DZD), Clinical Chemistry Laboratory, Institute for Diabetes Research and Metabolic Diseases, University Hospital Tübingen, 72076, Tübingen, Germany.,German Center for Diabetes Research (DZD), Tübingen, Germany
| | - Xiaohui Lin
- Department of Computer Science & Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Hailong Piao
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Cora Weigert
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, 72076, Tübingen, Germany.,Core Facility German Center for Diabetes Research (DZD), Clinical Chemistry Laboratory, Institute for Diabetes Research and Metabolic Diseases, University Hospital Tübingen, 72076, Tübingen, Germany.,German Center for Diabetes Research (DZD), Tübingen, Germany
| | - Peiyuan Yin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Rainer Lehmann
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, 72076, Tübingen, Germany.,Core Facility German Center for Diabetes Research (DZD), Clinical Chemistry Laboratory, Institute for Diabetes Research and Metabolic Diseases, University Hospital Tübingen, 72076, Tübingen, Germany.,German Center for Diabetes Research (DZD), Tübingen, Germany
| | - Guowang Xu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
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21
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Crooks DR, Fan TWM, Linehan WM. Metabolic Labeling of Cultured Mammalian Cells for Stable Isotope-Resolved Metabolomics: Practical Aspects of Tissue Culture and Sample Extraction. Methods Mol Biol 2019; 1928:1-27. [PMID: 30725447 PMCID: PMC8195444 DOI: 10.1007/978-1-4939-9027-6_1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Stable isotope-resolved metabolomics (SIRM) methods are used increasingly by cancer researchers to probe metabolic pathways and identify vulnerabilities in cancer cells. Analytical and computational advances are being made constantly, but tissue culture and sample extraction procedures are often variable and not elaborated in the literature. This chapter discusses basic aspects of tissue culture practices as they relate to the use of stable isotope tracers and provides a detailed metabolic labeling and metabolite extraction procedure designed to maximize the amount of information that can be obtained from a single tracer experiment.
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Affiliation(s)
- Daniel R Crooks
- Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Teresa W-M Fan
- Department of Toxicology and Cancer Biology, Center for Environmental and Systems Biochemistry, Markey Cancer Center, and University of Kentucky, Lexington, KY, USA.
| | - W Marston Linehan
- Urologic Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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22
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Zhou Z, Austin GL, Young LEA, Johnson LA, Sun R. Mitochondrial Metabolism in Major Neurological Diseases. Cells 2018; 7:E229. [PMID: 30477120 PMCID: PMC6316877 DOI: 10.3390/cells7120229] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 11/19/2018] [Accepted: 11/21/2018] [Indexed: 01/18/2023] Open
Abstract
Mitochondria are bilayer sub-cellular organelles that are an integral part of normal cellular physiology. They are responsible for producing the majority of a cell's ATP, thus supplying energy for a variety of key cellular processes, especially in the brain. Although energy production is a key aspect of mitochondrial metabolism, its role extends far beyond energy production to cell signaling and epigenetic regulation⁻functions that contribute to cellular proliferation, differentiation, apoptosis, migration, and autophagy. Recent research on neurological disorders suggest a major metabolic component in disease pathophysiology, and mitochondria have been shown to be in the center of metabolic dysregulation and possibly disease manifestation. This review will discuss the basic functions of mitochondria and how alterations in mitochondrial activity lead to neurological disease progression.
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Affiliation(s)
- Zhengqiu Zhou
- Molecular & Cellular Biochemistry Department, University of Kentucky, Lexington, KY 40536, USA.
| | - Grant L Austin
- Molecular & Cellular Biochemistry Department, University of Kentucky, Lexington, KY 40536, USA.
| | - Lyndsay E A Young
- Molecular & Cellular Biochemistry Department, University of Kentucky, Lexington, KY 40536, USA.
| | - Lance A Johnson
- Department of Physiology, University of Kentucky, Lexington, KY 40536, USA.
| | - Ramon Sun
- Molecular & Cellular Biochemistry Department, University of Kentucky, Lexington, KY 40536, USA.
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23
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Mitchell JM, Flight RM, Wang QJ, Higashi RM, Fan TWM, Lane AN, Moseley HNB. New methods to identify high peak density artifacts in Fourier transform mass spectra and to mitigate their effects on high-throughput metabolomic data analysis. Metabolomics 2018; 14:125. [PMID: 30830442 PMCID: PMC6153687 DOI: 10.1007/s11306-018-1426-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 09/05/2018] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Direct injection Fourier-transform mass spectrometry (FT-MS) allows for the high-throughput and high-resolution detection of thousands of metabolite-associated isotopologues. However, spectral artifacts can generate large numbers of spectral features (peaks) that do not correspond to known compounds. Misassignment of these artifactual features creates interpretive errors and limits our ability to discern the role of representative features within living systems. OBJECTIVES Our goal is to develop rigorous methods that identify and handle spectral artifacts within the context of high-throughput FT-MS-based metabolomics studies. RESULTS We observed three types of artifacts unique to FT-MS that we named high peak density (HPD) sites: fuzzy sites, ringing and partial ringing. While ringing artifacts are well-known, fuzzy sites and partial ringing have not been previously well-characterized in the literature. We developed new computational methods based on comparisons of peak density within a spectrum to identify regions of spectra with fuzzy sites. We used these methods to identify and eliminate fuzzy site artifacts in an example dataset of paired cancer and non-cancer lung tissue samples and evaluated the impact of these artifacts on classification accuracy and robustness. CONCLUSION Our methods robustly identified consistent fuzzy site artifacts in our FT-MS metabolomics spectral data. Without artifact identification and removal, 91.4% classification accuracy was achieved on an example lung cancer dataset; however, these classifiers rely heavily on artifactual features present in fuzzy sites. Proper removal of fuzzy site artifacts produces a more robust classifier based on non-artifactual features, with slightly improved accuracy of 92.4% in our example analysis.
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Affiliation(s)
- Joshua M Mitchell
- Department of Molecular & Cellular Biochemistry, University of Kentucky, Lexington, KY, USA
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Center for Environment and Systems Biochemistry and the Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA
| | - Robert M Flight
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Center for Environment and Systems Biochemistry and the Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA
| | - Qing Jun Wang
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, KY, USA
| | - Richard M Higashi
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Center for Environment and Systems Biochemistry and the Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA
- Department of Toxicology & Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - Teresa W-M Fan
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Center for Environment and Systems Biochemistry and the Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA
- Department of Toxicology & Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - Andrew N Lane
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Center for Environment and Systems Biochemistry and the Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA
- Department of Toxicology & Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - Hunter N B Moseley
- Department of Molecular & Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA.
- Center for Environment and Systems Biochemistry and the Resource Center for Stable Isotope Resolved Metabolomics, University of Kentucky, Lexington, KY, USA.
- Institute for Biomedical Informatics, University of Kentucky, Lexington, KY, USA.
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Stable Isotope-Resolved Metabolomics Shows Metabolic Resistance to Anti-Cancer Selenite in 3D Spheroids versus 2D Cell Cultures. Metabolites 2018; 8:metabo8030040. [PMID: 29996515 PMCID: PMC6161115 DOI: 10.3390/metabo8030040] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 06/29/2018] [Accepted: 07/06/2018] [Indexed: 12/13/2022] Open
Abstract
Conventional two-dimensional (2D) cell cultures are grown on rigid plastic substrates with unrealistic concentration gradients of O2, nutrients, and treatment agents. More importantly, 2D cultures lack cell–cell and cell–extracellular matrix (ECM) interactions, which are critical for regulating cell behavior and functions. There are several three-dimensional (3D) cell culture systems such as Matrigel, hydrogels, micropatterned plates, and hanging drop that overcome these drawbacks but they suffer from technical challenges including long spheroid formation times, difficult handling for high throughput assays, and/or matrix contamination for metabolic studies. Magnetic 3D bioprinting (M3DB) can circumvent these issues by utilizing nanoparticles that enable spheroid formation and growth via magnetizing cells. M3DB spheroids have been shown to emulate tissue and tumor microenvironments while exhibiting higher resistance to toxic agents than their 2D counterparts. It is, however, unclear if and how such 3D systems impact cellular metabolic networks, which may determine altered toxic responses in cells. We employed a Stable Isotope-Resolved Metabolomics (SIRM) approach with 13C6-glucose as tracer to map central metabolic networks both in 2D cells and M3DB spheroids formed from lung (A549) and pancreatic (PANC1) adenocarcinoma cells without or with an anti-cancer agent (sodium selenite). We found that the extent of 13C-label incorporation into metabolites of glycolysis, the Krebs cycle, the pentose phosphate pathway, and purine/pyrimidine nucleotide synthesis was largely comparable between 2D and M3DB culture systems for both cell lines. The exceptions were the reduced capacity for de novo synthesis of pyrimidine and sugar nucleotides in M3DB than 2D cultures of A549 and PANC1 cells as well as the presence of gluconeogenic activity in M3DB spheroids of PANC1 cells but not in the 2D counterpart. More strikingly, selenite induced much less perturbation of these pathways in the spheroids relative to the 2D counterparts in both cell lines, which is consistent with the corresponding lesser effects on morphology and growth. Thus, the increased resistance of cancer cell spheroids to selenite may be linked to the reduced capacity of selenite to perturb these metabolic pathways necessary for growth and survival.
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25
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Papp L, Pötsch N, Grahovac M, Schmidbauer V, Woehrer A, Preusser M, Mitterhauser M, Kiesel B, Wadsak W, Beyer T, Hacker M, Traub-Weidinger T. Glioma Survival Prediction with Combined Analysis of In Vivo 11C-MET PET Features, Ex Vivo Features, and Patient Features by Supervised Machine Learning. J Nucl Med 2017; 59:892-899. [DOI: 10.2967/jnumed.117.202267] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 10/31/2017] [Indexed: 01/03/2023] Open
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26
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Noninvasive liquid diet delivery of stable isotopes into mouse models for deep metabolic network tracing. Nat Commun 2017; 8:1646. [PMID: 29158483 PMCID: PMC5696342 DOI: 10.1038/s41467-017-01518-z] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 09/25/2017] [Indexed: 01/01/2023] Open
Abstract
Delivering isotopic tracers for metabolic studies in rodents without overt stress is challenging. Current methods achieve low label enrichment in proteins and lipids. Here, we report noninvasive introduction of 13C6-glucose via a stress-free, ad libitum liquid diet. Using NMR and ion chromatography-mass spectrometry, we quantify extensive 13C enrichment in products of glycolysis, the Krebs cycle, the pentose phosphate pathway, nucleobases, UDP-sugars, glycogen, lipids, and proteins in mouse tissues during 12 to 48 h of 13C6-glucose feeding. Applying this approach to patient-derived lung tumor xenografts (PDTX), we show that the liver supplies glucose-derived Gln via the blood to the PDTX to fuel Glu and glutathione synthesis while gluconeogenesis occurs in the PDTX. Comparison of PDTX with ex vivo tumor cultures and arsenic-transformed lung cells versus xenografts reveals differential glucose metabolism that could reflect distinct tumor microenvironment. We further found differences in glucose metabolism between the primary PDTX and distant lymph node metastases.
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27
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Karst DJ, Steinhoff RF, Kopp MRG, Soos M, Zenobi R, Morbidelli M. Isotope labeling to determine the dynamics of metabolic response in CHO cell perfusion bioreactors using MALDI-TOF-MS. Biotechnol Prog 2017; 33:1630-1639. [PMID: 28840654 DOI: 10.1002/btpr.2539] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 06/22/2017] [Indexed: 01/09/2023]
Abstract
The steady-state operation of Chinese hamster ovary (CHO) cells in perfusion bioreactors requires the equilibration of reactor dynamics and cell metabolism. Accordingly, in this work we investigate the transient cellular response to changes in its environment and their interactions with the bioreactor hydrodynamics. This is done in a benchtop perfusion bioreactor using MALDI-TOF MS through isotope labeling of complex intracellular nucleotides (ATP, UTP) and nucleotide sugars (UDP-Hex, UDP-HexNAc). By switching to a 13 C6 glucose containing feed media during constant operation at 20 × 106 cells and a perfusion rate of 1 reactor volume per day, isotopic steady state was studied. A step change to the 13 C6 glucose medium in spin tubes allowed the determination of characteristic times for the intracellular turnover of unlabeled metabolites pools, τST (≤0.56 days), which were confirmed in the bioreactor. On the other hand, it is shown that the reactor residence time τR (1 day) and characteristic time for glucose uptake τGlc (0.33 days), representative of the bioreactor dynamics, delayed the consumption of 13 C6 glucose in the bioreactor and thus the intracellular 13 C enrichment. The proposed experimental approach allowed the decoupling of bioreactor hydrodynamics and intrinsic dynamics of cell metabolism in response to a change in the cell culture environment. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1630-1639, 2017.
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Affiliation(s)
- Daniel J Karst
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Robert F Steinhoff
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Marie R G Kopp
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Miroslav Soos
- Department of Chemical Engineering, University of Chemistry and Technology, Technicka 3, Prague, 166 28, Czech Republic
| | - Renato Zenobi
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland
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Lane AN, Tan J, Wang Y, Yan J, Higashi RM, Fan TWM. Probing the metabolic phenotype of breast cancer cells by multiple tracer stable isotope resolved metabolomics. Metab Eng 2017; 43:125-136. [PMID: 28163219 PMCID: PMC5540847 DOI: 10.1016/j.ymben.2017.01.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 01/20/2017] [Accepted: 01/24/2017] [Indexed: 12/12/2022]
Abstract
Breast cancers vary by their origin and specific set of genetic lesions, which gives rise to distinct phenotypes and differential response to targeted and untargeted chemotherapies. To explore the functional differences of different breast cell types, we performed Stable Isotope Resolved Metabolomics (SIRM) studies of one primary breast (HMEC) and three breast cancer cells (MCF-7, MDAMB-231, and ZR75-1) having distinct genotypes and growth characteristics, using 13C6-glucose, 13C-1+2-glucose, 13C5,15N2-Gln, 13C3-glycerol, and 13C8-octanoate as tracers. These tracers were designed to probe the central energy producing and anabolic pathways (glycolysis, pentose phosphate pathway, Krebs Cycle, glutaminolysis, nucleotide synthesis and lipid turnover). We found that glycolysis was not associated with the rate of breast cancer cell proliferation, glutaminolysis did not support lipid synthesis in primary breast or breast cancer cells, but was a major contributor to pyrimidine ring synthesis in all cell types; anaplerotic pyruvate carboxylation was activated in breast cancer versus primary cells. We also found that glucose metabolism in individual breast cancer cell lines differed between in vitro cultures and tumor xenografts, but not the metabolic distinctions between cell lines, which may reflect the influence of tumor architecture/microenvironment.
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Affiliation(s)
- Andrew N Lane
- J.G. Brown Cancer Center, University of Louisville, Louisville, KY, United States; Dept. Chemistry and Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, KY, United States.
| | - Julie Tan
- J.G. Brown Cancer Center, University of Louisville, Louisville, KY, United States.
| | - Yali Wang
- J.G. Brown Cancer Center, University of Louisville, Louisville, KY, United States.
| | - Jun Yan
- J.G. Brown Cancer Center, University of Louisville, Louisville, KY, United States
| | - Richard M Higashi
- Dept. Chemistry and Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, KY, United States
| | - Teresa W-M Fan
- J.G. Brown Cancer Center, University of Louisville, Louisville, KY, United States; Dept. Chemistry and Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, KY, United States.
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29
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Integration of flux measurements to resolve changes in anabolic and catabolic metabolism in cardiac myocytes. Biochem J 2017; 474:2785-2801. [PMID: 28706006 PMCID: PMC5545928 DOI: 10.1042/bcj20170474] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 12/18/2022]
Abstract
Although ancillary pathways of glucose metabolism are critical for synthesizing cellular building blocks and modulating stress responses, how they are regulated remains unclear. In the present study, we used radiometric glycolysis assays, [13C6]-glucose isotope tracing, and extracellular flux analysis to understand how phosphofructokinase (PFK)-mediated changes in glycolysis regulate glucose carbon partitioning into catabolic and anabolic pathways. Expression of kinase-deficient or phosphatase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase in rat neonatal cardiomyocytes co-ordinately regulated glycolytic rate and lactate production. Nevertheless, in all groups, >40% of glucose consumed by the cells was unaccounted for via catabolism to pyruvate, which suggests entry of glucose carbons into ancillary pathways branching from metabolites formed in the preparatory phase of glycolysis. Analysis of 13C fractional enrichment patterns suggests that PFK activity regulates glucose carbon incorporation directly into the ribose and the glycerol moieties of purines and phospholipids, respectively. Pyrimidines, UDP-N-acetylhexosamine, and the fatty acyl chains of phosphatidylinositol and triglycerides showed lower 13C incorporation under conditions of high PFK activity; the isotopologue 13C enrichment pattern of each metabolite indicated limitations in mitochondria-engendered aspartate, acetyl CoA and fatty acids. Consistent with this notion, high glycolytic rate diminished mitochondrial activity and the coupling of glycolysis to glucose oxidation. These findings suggest that a major portion of intracellular glucose in cardiac myocytes is apportioned for ancillary biosynthetic reactions and that PFK co-ordinates the activities of the pentose phosphate, hexosamine biosynthetic, and glycerolipid synthesis pathways by directly modulating glycolytic intermediate entry into auxiliary glucose metabolism pathways and by indirectly regulating mitochondrial cataplerosis.
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30
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Bruntz RC, Lane AN, Higashi RM, Fan TWM. Exploring cancer metabolism using stable isotope-resolved metabolomics (SIRM). J Biol Chem 2017; 292:11601-11609. [PMID: 28592486 PMCID: PMC5512057 DOI: 10.1074/jbc.r117.776054] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Metabolic reprogramming is a hallmark of cancer. The changes in metabolism are adaptive to permit proliferation, survival, and eventually metastasis in a harsh environment. Stable isotope-resolved metabolomics (SIRM) is an approach that uses advanced approaches of NMR and mass spectrometry to analyze the fate of individual atoms from stable isotope-enriched precursors to products to deduce metabolic pathways and networks. The approach can be applied to a wide range of biological systems, including human subjects. This review focuses on the applications of SIRM to cancer metabolism and its use in understanding drug actions.
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Affiliation(s)
- Ronald C Bruntz
- Center for Environmental and Systems Biochemistry, Markey Cancer Center, Lexington, Kentucky 40506; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky 40506
| | - Andrew N Lane
- Center for Environmental and Systems Biochemistry, Markey Cancer Center, Lexington, Kentucky 40506; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky 40506.
| | - Richard M Higashi
- Center for Environmental and Systems Biochemistry, Markey Cancer Center, Lexington, Kentucky 40506; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky 40506
| | - Teresa W-M Fan
- Center for Environmental and Systems Biochemistry, Markey Cancer Center, Lexington, Kentucky 40506; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky 40506.
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31
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Yang Y, Fan TWM, Lane AN, Higashi RM. Chloroformate derivatization for tracing the fate of Amino acids in cells and tissues by multiple stable isotope resolved metabolomics (mSIRM). Anal Chim Acta 2017; 976:63-73. [PMID: 28576319 DOI: 10.1016/j.aca.2017.04.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/02/2017] [Accepted: 04/03/2017] [Indexed: 12/29/2022]
Abstract
Amino acids have crucial roles in central metabolism, both anabolic and catabolic. To elucidate these roles, steady-state concentrations of amino acids alone are insufficient, as each amino acid participates in multiple pathways and functions in a complex network, which can also be compartmentalized. Stable Isotope-Resolved Metabolomics (SIRM) is an approach that uses atom-resolved tracking of metabolites through biochemical transformations in cells, tissues, or whole organisms. Using different elemental stable isotopes to label multiple metabolite precursors makes it possible to resolve simultaneously the utilization of these precursors in a single experiment. Conversely, a single precursor labeled with two (or more) different elemental isotopes can trace the allocation of e.g. C and N atoms through the network. Such dual-label experiments however challenge the resolution of conventional mass spectrometers, which must distinguish the neutron mass differences among different elemental isotopes. This requires ultrahigh resolution Fourier transform mass spectrometry (UHR-FTMS). When combined with direct infusion nano-electrospray ion source (nano-ESI), UHR-FTMS can provide rapid, global, and quantitative analysis of all possible mass isotopologues of metabolites. Unfortunately, very low mass polar metabolites such as amino acids can be difficult to analyze by current models of UHR-FTMS, plus the high salt content present in typical cell or tissue polar extracts may cause unacceptable ion suppression for sources such as nano-ESI. Here we describe a modified method of ethyl chloroformate (ECF) derivatization of amino acids to enable rapid quantitative analysis of stable isotope labeled amino acids using nano-ESI UHR-FTMS. This method showed excellent linearity with quantifiable limits in the low nanomolar range represented in microgram quantities of biological specimens, which results in extracts with total analyte abundances in the low to sub-femtomole range. We have applied this method to profile amino acids and their labeling patterns in 13C and 2H doubly labeled PC9 cell extracts, cancerous and non-cancerous tissue extracts from a lung cancer patient and their protein hydrolysates as well as plasma extracts from mice fed with a liquid diet containing 13C6-glucose (Glc). The multi-element isotopologue distributions provided key insights into amino acid metabolism and intracellular pools in human lung cancer tissues in high detail. The 13C labeling of Asp and Glu revealed de novo synthesis of these amino acids from 13C6-Glc via the Krebs cycle, specifically the elevated level of 13C3-labeled Asp and Glu in cancerous versus non-cancerous lung tissues was consistent with enhanced pyruvate carboxylation. In addition, tracking the fate of double tracers, (13C6-Glc + 2H2-Gly or 13C6-Glc + 2H3-Ser) in PC9 cells clearly resolved pools of Ser and Gly synthesized de novo from 13C6-Glc (13C3-Ser and 13C2-Gly) versus Ser and Gly derived from external sources (2H3-Ser, 2H2-Gly). Moreover the complex 2H labeling patterns of the latter were results of Ser and Gly exchange through active Ser-Gly one-carbon metabolic pathway in PC9 cells.
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Affiliation(s)
- Ye Yang
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, 40539, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA
| | - Teresa W-M Fan
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, 40539, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA.
| | - Andrew N Lane
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, 40539, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA
| | - Richard M Higashi
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY, 40539, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40539, USA.
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Vinaixa M, Rodríguez MA, Aivio S, Capellades J, Gómez J, Canyellas N, Stracker TH, Yanes O. Positional Enrichment by Proton Analysis (PEPA): A One-Dimensional 1 H-NMR Approach for 13 C Stable Isotope Tracer Studies in Metabolomics. Angew Chem Int Ed Engl 2017; 56:3531-3535. [PMID: 28220994 PMCID: PMC5363230 DOI: 10.1002/anie.201611347] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 01/11/2017] [Indexed: 11/12/2022]
Abstract
A novel metabolomics approach for NMR-based stable isotope tracer studies called PEPA is presented, and its performance validated using human cancer cells. PEPA detects the position of carbon label in isotopically enriched metabolites and quantifies fractional enrichment by indirect determination of 13 C-satellite peaks using 1D-1 H-NMR spectra. In comparison with 13 C-NMR, TOCSY and HSQC, PEPA improves sensitivity, accelerates the elucidation of 13 C positions in labeled metabolites and the quantification of the percentage of stable isotope enrichment. Altogether, PEPA provides a novel framework for extending the high-throughput of 1 H-NMR metabolic profiling to stable isotope tracing in metabolomics, facilitating and complementing the information derived from 2D-NMR experiments and expanding the range of isotopically enriched metabolites detected in cellular extracts.
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Affiliation(s)
- Maria Vinaixa
- Department of Electronic Engineering-Universitat Rovira i VirgiliSpanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM)43204ReusSpain
| | - Miguel A. Rodríguez
- Universitat Rovira i VirgiliSpanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM)43204ReusSpain
| | - Suvi Aivio
- Institute for Research in Biomedicine (IRB Barcelona)The Barcelona Institute of Science and Technology08028BarcelonaSpain
| | - Jordi Capellades
- Universitat Rovira i VirgiliSpanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM)43204ReusSpain
| | - Josep Gómez
- Department of Electronic Engineering-Universitat Rovira i Virgili43007TarragonaSpain
| | - Nicolau Canyellas
- Department of Electronic Engineering-Universitat Rovira i Virgili43007TarragonaSpain
| | - Travis H. Stracker
- Institute for Research in Biomedicine (IRB Barcelona)The Barcelona Institute of Science and Technology08028BarcelonaSpain
| | - Oscar Yanes
- Department of Electronic Engineering-Universitat Rovira i VirgiliSpanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM)43204ReusSpain
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Wan Q, Wang Y, Tang H. Quantitative 13C Traces of Glucose Fate in Hepatitis B Virus-Infected Hepatocytes. Anal Chem 2017; 89:3293-3299. [PMID: 28221022 DOI: 10.1021/acs.analchem.6b03200] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Quantitative characterization of 13C-labeled metabolites is an important part of the stable isotope tracing method widely used in metabolic flux analysis. Given the long relaxation time and low sensitivity of 13C nuclei, direct measurement of 13C-labeled metabolites using one-dimensional 13C NMR often fails to meet the demand of metabolomics studies, especially with large numbers of samples and metabolites having low abundance. Although HSQC-based 2D NMR methods have improved sensitivity with inversion detection, they are time-consuming and thus unsuitable for high-throughput absolute quantification of 13C-labeled metabolites. In this study, we developed a method for absolute quantification of 13C-labeled metabolites using naturally abundant TSP as a reference with the first increment of the HMQC pulse sequence, taking polarization transfer efficiencies into consideration. We validated this method using a mixture of 13C-labeled alanine, methionine, glucose, and formic acid together with a mixture of alanine, lactate, glycine, uridine, cytosine, and hypoxanthine, which have natural 13C abundance with known concentrations. We subsequently applied this method to analyze the flux of glucose in HepG2 cells infected with hepatitis B virus (HBV). The results showed that HBV infection increased the cellular uptake of glucose, stimulated glycolysis, and enhanced the pentose phosphate and hexosamine pathways for biosynthesis of RNA and DNA and nucleotide sugars to facilitate HBV replication. This method saves experimental time and provides a possibility for absolute quantitative tracking of the 13C-labeled metabolites for high-throughput studies.
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Affiliation(s)
- Qianfen Wan
- State Key Laboratory of Genetic Engineering, Zhongshan Hospital and School of Life Sciences, Fudan University , Shanghai International Centre for Molecular Phenomics, Collaborative Innovation Center for Genetics and Development, Shanghai 200438, China
| | - Yulan Wang
- CAS Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310058, China
| | - Huiru Tang
- State Key Laboratory of Genetic Engineering, Zhongshan Hospital and School of Life Sciences, Fudan University , Shanghai International Centre for Molecular Phenomics, Collaborative Innovation Center for Genetics and Development, Shanghai 200438, China
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34
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Vinaixa M, Rodríguez MA, Aivio S, Capellades J, Gómez J, Canyellas N, Stracker TH, Yanes O. Positional Enrichment by Proton Analysis (PEPA): A One‐Dimensional
1
H‐NMR Approach for
13
C Stable Isotope Tracer Studies in Metabolomics. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Vinaixa
- Department of Electronic Engineering-Universitat Rovira i Virgili Spanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM) 43204 Reus Spain
| | - Miguel A. Rodríguez
- Universitat Rovira i Virgili Spanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM) 43204 Reus Spain
| | - Suvi Aivio
- Institute for Research in Biomedicine (IRB Barcelona) The Barcelona Institute of Science and Technology 08028 Barcelona Spain
| | - Jordi Capellades
- Universitat Rovira i Virgili Spanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM) 43204 Reus Spain
| | - Josep Gómez
- Department of Electronic Engineering- Universitat Rovira i Virgili 43007 Tarragona Spain
| | - Nicolau Canyellas
- Department of Electronic Engineering- Universitat Rovira i Virgili 43007 Tarragona Spain
| | - Travis H. Stracker
- Institute for Research in Biomedicine (IRB Barcelona) The Barcelona Institute of Science and Technology 08028 Barcelona Spain
| | - Oscar Yanes
- Department of Electronic Engineering-Universitat Rovira i Virgili Spanish Biomedical Research Center in Diabetes and Associated Metabolic Disorders (CIBERDEM) 43204 Reus Spain
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35
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Wang X, Yuan ZF, Fan J, Karch KR, Ball LE, Denu JM, Garcia BA. A Novel Quantitative Mass Spectrometry Platform for Determining Protein O-GlcNAcylation Dynamics. Mol Cell Proteomics 2016; 15:2462-75. [PMID: 27114449 DOI: 10.1074/mcp.o115.049627] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 12/28/2022] Open
Abstract
Over the past decades, protein O-GlcNAcylation has been found to play a fundamental role in cell cycle control, metabolism, transcriptional regulation, and cellular signaling. Nevertheless, quantitative approaches to determine in vivo GlcNAc dynamics at a large-scale are still not readily available. Here, we have developed an approach to isotopically label O-GlcNAc modifications on proteins by producing (13)C-labeled UDP-GlcNAc from (13)C6-glucose via the hexosamine biosynthetic pathway. This metabolic labeling was combined with quantitative mass spectrometry-based proteomics to determine protein O-GlcNAcylation turnover rates. First, an efficient enrichment method for O-GlcNAc peptides was developed with the use of phenylboronic acid solid-phase extraction and anhydrous DMSO. The near stoichiometry reaction between the diol of GlcNAc and boronic acid dramatically improved the enrichment efficiency. Additionally, our kinetic model for turnover rates integrates both metabolomic and proteomic data, which increase the accuracy of the turnover rate estimation. Other advantages of this metabolic labeling method include in vivo application, direct labeling of the O-GlcNAc sites and higher confidence for site identification. Concentrating only on nuclear localized GlcNAc modified proteins, we are able to identify 105 O-GlcNAc peptides on 42 proteins and determine turnover rates of 20 O-GlcNAc peptides from 14 proteins extracted from HeLa nuclei. In general, we found O-GlcNAcylation turnover rates are slower than those published for phosphorylation or acetylation. Nevertheless, the rates widely varied depending on both the protein and the residue modified. We believe this methodology can be broadly applied to reveal turnovers/dynamics of protein O-GlcNAcylation from different biological states and will provide more information on the significance of O-GlcNAcylation, enabling us to study the temporal dynamics of this critical modification for the first time.
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Affiliation(s)
- Xiaoshi Wang
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Zuo-Fei Yuan
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Jing Fan
- §Department of Biomolecular Chemistry, University of Wisconsin, Madison, Wisconsin 53715
| | - Kelly R Karch
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Lauren E Ball
- ¶Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - John M Denu
- §Department of Biomolecular Chemistry, University of Wisconsin, Madison, Wisconsin 53715
| | - Benjamin A Garcia
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104;
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36
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Fan TWM, Lane AN. Applications of NMR spectroscopy to systems biochemistry. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2016; 92-93:18-53. [PMID: 26952191 PMCID: PMC4850081 DOI: 10.1016/j.pnmrs.2016.01.005] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/26/2016] [Accepted: 01/28/2016] [Indexed: 05/05/2023]
Abstract
The past decades of advancements in NMR have made it a very powerful tool for metabolic research. Despite its limitations in sensitivity relative to mass spectrometric techniques, NMR has a number of unparalleled advantages for metabolic studies, most notably the rigor and versatility in structure elucidation, isotope-filtered selection of molecules, and analysis of positional isotopomer distributions in complex mixtures afforded by multinuclear and multidimensional experiments. In addition, NMR has the capacity for spatially selective in vivo imaging and dynamical analysis of metabolism in tissues of living organisms. In conjunction with the use of stable isotope tracers, NMR is a method of choice for exploring the dynamics and compartmentation of metabolic pathways and networks, for which our current understanding is grossly insufficient. In this review, we describe how various direct and isotope-edited 1D and 2D NMR methods can be employed to profile metabolites and their isotopomer distributions by stable isotope-resolved metabolomic (SIRM) analysis. We also highlight the importance of sample preparation methods including rapid cryoquenching, efficient extraction, and chemoselective derivatization to facilitate robust and reproducible NMR-based metabolomic analysis. We further illustrate how NMR has been applied in vitro, ex vivo, or in vivo in various stable isotope tracer-based metabolic studies, to gain systematic and novel metabolic insights in different biological systems, including human subjects. The pathway and network knowledge generated from NMR- and MS-based tracing of isotopically enriched substrates will be invaluable for directing functional analysis of other 'omics data to achieve understanding of regulation of biochemical systems, as demonstrated in a case study. Future developments in NMR technologies and reagents to enhance both detection sensitivity and resolution should further empower NMR in systems biochemical research.
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Affiliation(s)
- Teresa W-M Fan
- Department of Toxicology and Cancer Biology, University of Kentucky, 789 S. Limestone St., Lexington, KY 40536, United States.
| | - Andrew N Lane
- Department of Toxicology and Cancer Biology, University of Kentucky, 789 S. Limestone St., Lexington, KY 40536, United States.
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37
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Lane AN, Fan TWM. Regulation of mammalian nucleotide metabolism and biosynthesis. Nucleic Acids Res 2015; 43:2466-85. [PMID: 25628363 PMCID: PMC4344498 DOI: 10.1093/nar/gkv047] [Citation(s) in RCA: 544] [Impact Index Per Article: 60.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 12/21/2014] [Accepted: 01/12/2015] [Indexed: 12/25/2022] Open
Abstract
Nucleotides are required for a wide variety of biological processes and are constantly synthesized de novo in all cells. When cells proliferate, increased nucleotide synthesis is necessary for DNA replication and for RNA production to support protein synthesis at different stages of the cell cycle, during which these events are regulated at multiple levels. Therefore the synthesis of the precursor nucleotides is also strongly regulated at multiple levels. Nucleotide synthesis is an energy intensive process that uses multiple metabolic pathways across different cell compartments and several sources of carbon and nitrogen. The processes are regulated at the transcription level by a set of master transcription factors but also at the enzyme level by allosteric regulation and feedback inhibition. Here we review the cellular demands of nucleotide biosynthesis, their metabolic pathways and mechanisms of regulation during the cell cycle. The use of stable isotope tracers for delineating the biosynthetic routes of the multiple intersecting pathways and how these are quantitatively controlled under different conditions is also highlighted. Moreover, the importance of nucleotide synthesis for cell viability is discussed and how this may lead to potential new approaches to drug development in diseases such as cancer.
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Affiliation(s)
- Andrew N Lane
- Graduate Center of Toxicology and Markey Cancer Center, University of Kentucky, Biopharm Complex, 789 S. Limestone St, Lexington, KY 40536, USA
| | - Teresa W-M Fan
- Graduate Center of Toxicology and Markey Cancer Center, University of Kentucky, Biopharm Complex, 789 S. Limestone St, Lexington, KY 40536, USA
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38
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Clendinen CS, Stupp GS, Ajredini R, Lee-McMullen B, Beecher C, Edison AS. An overview of methods using (13)C for improved compound identification in metabolomics and natural products. FRONTIERS IN PLANT SCIENCE 2015; 6:611. [PMID: 26379677 PMCID: PMC4548202 DOI: 10.3389/fpls.2015.00611] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 07/23/2015] [Indexed: 05/11/2023]
Abstract
Compound identification is a major bottleneck in metabolomics studies. In nuclear magnetic resonance (NMR) investigations, resonance overlap often hinders unambiguous database matching or de novo compound identification. In liquid chromatography-mass spectrometry (LC-MS), discriminating between biological signals and background artifacts and reliable determination of molecular formulae are not always straightforward. We have designed and implemented several NMR and LC-MS approaches that utilize (13)C, either enriched or at natural abundance, in metabolomics applications. For LC-MS applications, we describe a technique called isotopic ratio outlier analysis (IROA), which utilizes samples that are isotopically labeled with 5% (test) and 95% (control) (13)C. This labeling strategy leads to characteristic isotopic patterns that allow the differentiation of biological signals from artifacts and yield the exact number of carbons, significantly reducing possible molecular formulae. The relative abundance between the test and control samples for every IROA feature can be determined simply by integrating the peaks that arise from the 5 and 95% channels. For NMR applications, we describe two (13)C-based approaches. For samples at natural abundance, we have developed a workflow to obtain (13)C-(13)C and (13)C-(1)H statistical correlations using 1D (13)C and (1)H NMR spectra. For samples that can be isotopically labeled, we describe another NMR approach to obtain direct (13)C-(13)C spectroscopic correlations. These methods both provide extensive information about the carbon framework of compounds in the mixture for either database matching or de novo compound identification. We also discuss strategies in which (13)C NMR can be used to identify unknown compounds from IROA experiments. By combining technologies with the same samples, we can identify important biomarkers and corresponding metabolites of interest.
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Affiliation(s)
- Chaevien S. Clendinen
- Southeast Center for Integrated Metabolomics, University of Florida, Gainesville, FL, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA
| | | | - Ramadan Ajredini
- Southeast Center for Integrated Metabolomics, University of Florida, Gainesville, FL, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA
| | - Brittany Lee-McMullen
- Southeast Center for Integrated Metabolomics, University of Florida, Gainesville, FL, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA
| | - Chris Beecher
- Southeast Center for Integrated Metabolomics, University of Florida, Gainesville, FL, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA
- IROA Technologies, Ann Arbor, MI, USA
| | - Arthur S. Edison
- Southeast Center for Integrated Metabolomics, University of Florida, Gainesville, FL, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA
- *Correspondence: Arthur S. Edison, Southeast Center for Integrated Metabolomics and Department of Biochemistry and Molecular Biology, University of Florida, 1600 Archer Road, Rm R3-226, Box 100245, Gainesville, FL 32610-0245, USA,
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39
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Larive CK, Barding GA, Dinges MM. NMR spectroscopy for metabolomics and metabolic profiling. Anal Chem 2014; 87:133-46. [PMID: 25375201 DOI: 10.1021/ac504075g] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Cynthia K Larive
- Department of Chemistry, University of California-Riverside , Riverside, California 92521, United States
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40
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Rennenberg H, Herschbach C. A detailed view on sulphur metabolism at the cellular and whole-plant level illustrates challenges in metabolite flux analyses. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:5711-24. [PMID: 25124317 DOI: 10.1093/jxb/eru315] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Understanding the dynamics of physiological process in the systems biology era requires approaches at the genome, transcriptome, proteome, and metabolome levels. In this context, metabolite flux experiments have been used in mapping metabolite pathways and analysing metabolic control. In the present review, sulphur metabolism was taken to illustrate current challenges of metabolic flux analyses. At the cellular level, restrictions in metabolite flux analyses originate from incomplete knowledge of the compartmentation network of metabolic pathways. Transport of metabolites through membranes is usually not considered in flux experiments but may be involved in controlling the whole pathway. Hence, steady-state and snapshot readings need to be expanded to time-course studies in combination with compartment-specific metabolite analyses. Because of species-specific differences, differences between tissues, and stress-related responses, the quantitative significance of different sulphur sinks has to be elucidated; this requires the development of methods for whole-sulphur metabolome approaches. Different cell types can contribute to metabolite fluxes to different extents at the tissue and organ level. Cell type-specific analyses are needed to characterize these contributions. Based on such approaches, metabolite flux analyses can be expanded to the whole-plant level by considering long-distance transport and, thus, the interaction of roots and the shoot in metabolite fluxes. However, whole-plant studies need detailed empirical and mathematical modelling that have to be validated by experimental analyses.
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Affiliation(s)
- Heinz Rennenberg
- Institute of Forest Sciences, Chair of Tree Physiology, University of Freiburg, Georges-Koehler-Allee 53, 79110 Freiburg, Germany Centre for Biosystems Analysis (ZBSA), University of Freiburg, Habsburgerstrasse 49, 79104 Freiburg, Germany
| | - Cornelia Herschbach
- Institute of Forest Sciences, Chair of Tree Physiology, University of Freiburg, Georges-Koehler-Allee 53, 79110 Freiburg, Germany
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41
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Young JD. (13)C metabolic flux analysis of recombinant expression hosts. Curr Opin Biotechnol 2014; 30:238-45. [PMID: 25456032 DOI: 10.1016/j.copbio.2014.10.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/10/2014] [Accepted: 10/11/2014] [Indexed: 12/11/2022]
Abstract
Identifying host cell metabolic phenotypes that promote high recombinant protein titer is a major goal of the biotech industry. (13)C metabolic flux analysis (MFA) provides a rigorous approach to quantify these metabolic phenotypes by applying isotope tracers to map the flow of carbon through intracellular metabolic pathways. Recent advances in tracer theory and measurements are enabling more information to be extracted from (13)C labeling experiments. Sustained development of publicly available software tools and standardization of experimental workflows is simultaneously encouraging increased adoption of (13)C MFA within the biotech research community. A number of recent (13)C MFA studies have identified increased citric acid cycle and pentose phosphate pathway fluxes as consistent markers of high recombinant protein expression, both in mammalian and microbial hosts. Further work is needed to determine whether redirecting flux into these pathways can effectively enhance protein titers while maintaining acceptable glycan profiles.
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Affiliation(s)
- Jamey D Young
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, PMB 351604, Nashville, TN 37235-1604, USA; Department of Molecular Physiology and Biophysics, Vanderbilt University, PMB 351604, Nashville, TN 37235-1604, USA.
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42
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Mitchell JM, Fan TWM, Lane AN, Moseley HNB. Development and in silico evaluation of large-scale metabolite identification methods using functional group detection for metabolomics. Front Genet 2014; 5:237. [PMID: 25120557 PMCID: PMC4112935 DOI: 10.3389/fgene.2014.00237] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 07/03/2014] [Indexed: 12/12/2022] Open
Abstract
Large-scale identification of metabolites is key to elucidating and modeling metabolism at the systems level. Advances in metabolomics technologies, particularly ultra-high resolution mass spectrometry (MS) enable comprehensive and rapid analysis of metabolites. However, a significant barrier to meaningful data interpretation is the identification of a wide range of metabolites including unknowns and the determination of their role(s) in various metabolic networks. Chemoselective (CS) probes to tag metabolite functional groups combined with high mass accuracy provide additional structural constraints for metabolite identification and quantification. We have developed a novel algorithm, Chemically Aware Substructure Search (CASS) that efficiently detects functional groups within existing metabolite databases, allowing for combined molecular formula and functional group (from CS tagging) queries to aid in metabolite identification without a priori knowledge. Analysis of the isomeric compounds in both Human Metabolome Database (HMDB) and KEGG Ligand demonstrated a high percentage of isomeric molecular formulae (43 and 28%, respectively), indicating the necessity for techniques such as CS-tagging. Furthermore, these two databases have only moderate overlap in molecular formulae. Thus, it is prudent to use multiple databases in metabolite assignment, since each major metabolite database represents different portions of metabolism within the biosphere. In silico analysis of various CS-tagging strategies under different conditions for adduct formation demonstrate that combined FT-MS derived molecular formulae and CS-tagging can uniquely identify up to 71% of KEGG and 37% of the combined KEGG/HMDB database vs. 41 and 17%, respectively without adduct formation. This difference between database isomer disambiguation highlights the strength of CS-tagging for non-lipid metabolite identification. However, unique identification of complex lipids still needs additional information.
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Affiliation(s)
- Joshua M Mitchell
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky Lexington, KY, USA
| | - Teresa W-M Fan
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky Lexington, KY, USA
| | - Andrew N Lane
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky Lexington, KY, USA
| | - Hunter N B Moseley
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky Lexington, KY, USA
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43
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Guin S, Pollard C, Ru Y, Ritterson Lew C, Duex JE, Dancik G, Owens C, Spencer A, Knight S, Holemon H, Gupta S, Hansel D, Hellerstein M, Lorkiewicz P, Lane AN, Fan TWM, Theodorescu D. Role in tumor growth of a glycogen debranching enzyme lost in glycogen storage disease. J Natl Cancer Inst 2014; 106:dju062. [PMID: 24700805 DOI: 10.1093/jnci/dju062] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Bladder cancer is the most common malignancy of the urinary system, yet our molecular understanding of this disease is incomplete, hampering therapeutic advances. METHODS Here we used a genome-wide functional short-hairpin RNA (shRNA) screen to identify suppressors of in vivo bladder tumor xenograft growth (n = 50) using bladder cancer UMUC3 cells. Next-generation sequencing was used to identify the most frequently occurring shRNAs in tumors. Genes so identified were studied in 561 patients with bladder cancer for their association with stratification of clinical outcome by Kaplan-Meier analysis. The best prognostic marker was studied to determine its mechanism in tumor suppression using anchorage-dependent and -independent growth, xenograft (n = 20), and metabolomic assays. Statistical significance was determined using two-sided Student t test and repeated-measures statistical analysis. RESULTS We identified the glycogen debranching enzyme AGL as a prognostic indicator of patient survival (P = .04) and as a novel regulator of bladder cancer anchorage-dependent (P < .001), anchorage-independent (mean ± standard deviation, 180 ± 23.1 colonies vs 20±9.5 in control, P < .001), and xenograft growth (P < .001). Rescue experiments using catalytically dead AGL variants revealed that this effect is independent of AGL enzymatic functions. We demonstrated that reduced AGL enhances tumor growth by increasing glycine synthesis through increased expression of serine hydroxymethyltransferase 2. CONCLUSIONS Using an in vivo RNA interference screen, we discovered that AGL, a glycogen debranching enzyme, has a biologically and statistically significant role in suppressing human cancer growth.
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Affiliation(s)
- Sunny Guin
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Courtney Pollard
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Yuanbin Ru
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Carolyn Ritterson Lew
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Jason E Duex
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Garrett Dancik
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Charles Owens
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Andrea Spencer
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Scott Knight
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Heather Holemon
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Sounak Gupta
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Donna Hansel
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Marc Hellerstein
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Pawel Lorkiewicz
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Andrew N Lane
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Teresa W-M Fan
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD)
| | - Dan Theodorescu
- Affiliations of authors: Department of Surgery (SGui, CP, YR, CRL, JED, GD, CO, DT) and Department of Pharmacology (SGui, CP, YR, CRL, JED, GD, CO, DT), University of Colorado, Denver, CO; Sigma-Aldrich Research Biotech, Saint Louis, MO (AS, SK, HH); Department of Pathology, Cleveland Clinic, Cleveland, OH (SGup, DH); Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA (MH); Department of Medicine, University of California at San Francisco, San Francisco, CA (MH); Center for Regulatory and Environmental Analytical Metabolomics, Department of Chemistry, University of Louisville, Louisville, KY (PL); Graduate Center of Toxicology, Biopharm Complex, University of Kentucky, Lexington, KY (ANL, TW-MF); University of Colorado Comprehensive Cancer Center, Denver, CO (DT). Present affiliations: Department of Biomedical Informatics, Windber Research Institute, Windber, PA (YR); Mathematics and Computer Science Department, Eastern Connecticut State University, Willimantic, CT (GD).
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Role of Chinese hamster ovary central carbon metabolism in controlling the quality of secreted biotherapeutic proteins. ACTA ACUST UNITED AC 2014. [DOI: 10.4155/pbp.13.65] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Higashi RM, Fan TWM, Lorkiewicz PK, Moseley HNB, Lane AN. Stable isotope-labeled tracers for metabolic pathway elucidation by GC-MS and FT-MS. Methods Mol Biol 2014; 1198:147-67. [PMID: 25270929 DOI: 10.1007/978-1-4939-1258-2_11] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Advances in analytical methodologies, principally nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS), over the last decade have made large-scale analysis of the human metabolome a reality. This is leading to the reawakening of the importance of metabolism in human diseases, particularly widespread metabolic diseases such as cancer, diabetes, and obesity. Emerging NMR and MS atom-tracking technologies and informatics are poised to revolutionize metabolomics-based research because they deliver the high information throughput (HIT) that is needed for deciphering systems biochemistry. In particular, stable isotope-resolved metabolomics (SIRM) enables unambiguous tracking of individual atoms through compartmentalized metabolic networks in a wide range of experimental systems, including human subjects. MS offers a wide range of instrumental capabilities involving different levels of initial capital outlay and operating costs, ranging from gas-chromatography (GC) MS that is affordable by many individual laboratories to the HIT-supporting Fourier-transform (FT) class of MS that rivals NMR in cost and infrastructure support. This chapter focuses on sample preparation, instrument, and data processing procedures for these two extremes of MS instrumentation used in SIRM.
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Affiliation(s)
- Richard M Higashi
- Graduate Center of Toxicology, University of Kentucky, Biopharm Complex, 789 S. Limestone St., Lexington, KY, 40536, USA,
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Carreer WJ, Flight RM, Moseley HNB. A Computational Framework for High-Throughput Isotopic Natural Abundance Correction of Omics-Level Ultra-High Resolution FT-MS Datasets. Metabolites 2013; 3:853-866. [PMID: 24404440 PMCID: PMC3882318 DOI: 10.3390/metabo3040853] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 08/26/2013] [Accepted: 09/10/2013] [Indexed: 11/17/2022] Open
Abstract
New metabolomics applications of ultra-high resolution and accuracy mass spectrometry can provide thousands of detectable isotopologues, with the number of potentially detectable isotopologues increasing exponentially with the number of stable isotopes used in newer isotope tracing methods like stable isotope-resolved metabolomics (SIRM) experiments. This huge increase in usable data requires software capable of correcting the large number of isotopologue peaks resulting from SIRM experiments in a timely manner. We describe the design of a new algorithm and software system capable of handling these high volumes of data, while including quality control methods for maintaining data quality. We validate this new algorithm against a previous single isotope correction algorithm in a two-step cross-validation. Next, we demonstrate the algorithm and correct for the effects of natural abundance for both (13)C and (15)N isotopes on a set of raw isotopologue intensities of UDP-N-acetyl-D-glucosamine derived from a (13)C/(15)N-tracing experiment. Finally, we demonstrate the algorithm on a full omics-level dataset.
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Affiliation(s)
- William J Carreer
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536, USA; (W.J.C.); (R.M.F.)
| | - Robert M Flight
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536, USA; (W.J.C.); (R.M.F.)
| | - Hunter N B Moseley
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536, USA; (W.J.C.); (R.M.F.)
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Nakajima K, Ito E, Ohtsubo K, Shirato K, Takamiya R, Kitazume S, Angata T, Taniguchi N. Mass isotopomer analysis of metabolically labeled nucleotide sugars and N- and O-glycans for tracing nucleotide sugar metabolisms. Mol Cell Proteomics 2013; 12:2468-80. [PMID: 23720760 PMCID: PMC3769324 DOI: 10.1074/mcp.m112.027151] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 05/20/2013] [Indexed: 12/14/2022] Open
Abstract
Nucleotide sugars are the donor substrates of various glycosyltransferases, and an important building block in N- and O-glycan biosynthesis. Their intercellular concentrations are regulated by cellular metabolic states including diseases such as cancer and diabetes. To investigate the fate of UDP-GlcNAc, we developed a tracing method for UDP-GlcNAc synthesis and use, and GlcNAc utilization using (13)C6-glucose and (13)C2-glucosamine, respectively, followed by the analysis of mass isotopomers using LC-MS. Metabolic labeling of cultured cells with (13)C6-glucose and the analysis of isotopomers of UDP-HexNAc (UDP-GlcNAc plus UDP-GalNAc) and CMP-NeuAc revealed the relative contributions of metabolic pathways leading to UDP-GlcNAc synthesis and use. In pancreatic insulinoma cells, the labeling efficiency of a (13)C6-glucose motif in CMP-NeuAc was lower compared with that in hepatoma cells. Using (13)C2-glucosamine, the diversity of the labeling efficiency was observed in each sugar residue of N- and O-glycans on the basis of isotopomer analysis. In the insulinoma cells, the low labeling efficiencies were found for sialic acids as well as tri- and tetra-sialo N-glycans, whereas asialo N-glycans were found to be abundant. Essentially no significant difference in secreted hyaluronic acids was found among hepatoma and insulinoma cell lines. This indicates that metabolic flows are responsible for the low sialylation in the insulinoma cells. Our strategy should be useful for systematically tracing each stage of cellular GlcNAc metabolism.
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Affiliation(s)
- Kazuki Nakajima
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Emi Ito
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kazuaki Ohtsubo
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Ken Shirato
- §Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima Tokorozawa, Saitama 359-1192, Japan
| | - Rina Takamiya
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Shinobu Kitazume
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Takashi Angata
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Naoyuki Taniguchi
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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Moseley HN. Error Analysis and Propagation in Metabolomics Data Analysis. Comput Struct Biotechnol J 2013; 4:e201301006. [PMID: 23667718 PMCID: PMC3647477 DOI: 10.5936/csbj.201301006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 01/27/2013] [Accepted: 02/08/2013] [Indexed: 01/25/2023] Open
Abstract
Error analysis plays a fundamental role in describing the uncertainty in experimental results. It has several fundamental uses in metabolomics including experimental design, quality control of experiments, the selection of appropriate statistical methods, and the determination of uncertainty in results. Furthermore, the importance of error analysis has grown with the increasing number, complexity, and heterogeneity of measurements characteristic of 'omics research. The increase in data complexity is particularly problematic for metabolomics, which has more heterogeneity than other omics technologies due to the much wider range of molecular entities detected and measured. This review introduces the fundamental concepts of error analysis as they apply to a wide range of metabolomics experimental designs and it discusses current methodologies for determining the propagation of uncertainty in appropriate metabolomics data analysis. These methodologies include analytical derivation and approximation techniques, Monte Carlo error analysis, and error analysis in metabolic inverse problems. Current limitations of each methodology with respect to metabolomics data analysis are also discussed.
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Affiliation(s)
- Hunter N.B. Moseley
- Department of Chemistry, Center for Regulatory and Environmental Analytical Metabolomics, University of Louisville, Louisville, Kentucky, USA
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Yi W, Clark PM, Mason DE, Keenan MC, Hill C, Goddard WA, Peters EC, Driggers EM, Hsieh-Wilson LC. Phosphofructokinase 1 glycosylation regulates cell growth and metabolism. Science 2012; 337:975-80. [PMID: 22923583 DOI: 10.1126/science.1222278] [Citation(s) in RCA: 463] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cancer cells must satisfy the metabolic demands of rapid cell growth within a continually changing microenvironment. We demonstrated that the dynamic posttranslational modification of proteins by O-linked β-N-acetylglucosamine (O-GlcNAcylation) is a key metabolic regulator of glucose metabolism. O-GlcNAcylation was induced at serine 529 of phosphofructokinase 1 (PFK1) in response to hypoxia. Glycosylation inhibited PFK1 activity and redirected glucose flux through the pentose phosphate pathway, thereby conferring a selective growth advantage on cancer cells. Blocking glycosylation of PFK1 at serine 529 reduced cancer cell proliferation in vitro and impaired tumor formation in vivo. These studies reveal a previously uncharacterized mechanism for the regulation of metabolic pathways in cancer and a possible target for therapeutic intervention.
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Affiliation(s)
- Wen Yi
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
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Gebregiworgis T, Powers R. Application of NMR metabolomics to search for human disease biomarkers. Comb Chem High Throughput Screen 2012; 15:595-610. [PMID: 22480238 PMCID: PMC6625354 DOI: 10.2174/138620712802650522] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 03/07/2012] [Accepted: 04/03/2012] [Indexed: 11/22/2022]
Abstract
Since antiquity, humans have used body fluids like saliva, urine and sweat for the diagnosis of diseases. The amount, color and smell of body fluids are still used in many traditional medical practices to evaluate an illness and make a diagnosis. The development and application of analytical methods for the detailed analysis of body fluids has led to the discovery of numerous disease biomarkers. Recently, mass spectrometry (MS), nuclear magnetic resonance spectroscopy (NMR), and multivariate statistical techniques have been incorporated into a multidisciplinary approach to profile changes in small molecules associated with the onset and progression of human diseases. The goal of these efforts is to identify metabolites that are uniquely correlated with a specific human disease in order to accurately diagnose and treat the malady. In this review we will discuss recent developments in sample preparation, experimental techniques, the identification and quantification of metabolites, and the chemometric tools used to search for biomarkers of human diseases using NMR.
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Affiliation(s)
- Teklab Gebregiworgis
- Department of Chemistry, University of Nebraska-Lincoln, 722 Hamilton Hall, Lincoln, NE 68588- 0304, USA
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