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Suzuki A, Shiga T, Sato K, Shoda M, Yamaguchi J. Metabolome analysis in patients with heart failure and implantable cardioverter defibrillators. Heart Vessels 2024:10.1007/s00380-024-02452-z. [PMID: 39215819 DOI: 10.1007/s00380-024-02452-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Accepted: 08/21/2024] [Indexed: 09/04/2024]
Abstract
Heart failure (HF) is a complex, heterogeneous syndrome with several comorbidities, often life-threatening and requires urgent therapy. In HF, metabolic alterations that can be assessed using comprehensive plasma, and tissue profiling will help establish new biomarkers and therapeutic targets. Metabolomic analysis of sudden death in HF cases remains unresolved. We prospectively evaluated 19 patients who underwent implantable cardioverter defibrillator (ICD) placement for the primary prevention of sudden cardiac death (SCD). Metabolomic analysis was performed using plasma samples before ICD implantation. Ventricular arrhythmia (VA)/SCD was defined as VA with an appropriate ICD therapy or SCD. During a median follow-up of 29 months (range, 13-35 months), four patients developed VA and one patient developed SCD. Using metabolomic analysis, arginine, lysine, and valine were significantly reduced in patients with VA/SCD (n = 5) compared with those without VA/SCD (n = 14). The molecules involved in energy metabolism might be associated with VA/SCD, thus requiring further investigation as a predictive value of metabolomic analysis of VA/SCD.
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Affiliation(s)
- Atsushi Suzuki
- Department of Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan.
| | - Tsuyoshi Shiga
- Department of Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
- Department of Clinical Pharmacology and Therapeutics, the Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Kayoko Sato
- Department of Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
- Clinical Pathology Laboratory, Department of Food Science and Nutrition, Faculty of Nutrition, Tokyo Kasei University, Kaga 1-18-1, ItabashiTokyo, Japan
| | - Morio Shoda
- Department of Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Junichi Yamaguchi
- Department of Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
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Valerio E, Meneghelli M, Stocchero M, Galderisi A, Visentin S, Bonadies L, Pirillo P, Poloniato G, Giordano G, Baraldi E. The Impact of Antenatal Corticosteroids on the Metabolome of Preterm Newborns: An Untargeted Approach. Int J Mol Sci 2024; 25:5860. [PMID: 38892043 PMCID: PMC11172597 DOI: 10.3390/ijms25115860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 06/21/2024] Open
Abstract
We analyzed and compared variations in the urinary metabolome, as well as postnatal clinical outcomes among preterm infants, based on the timing of antenatal corticosteroid (ACS) administration in response to preterm labor onset in their mothers. This was a prospective observational study held in the Neonatal Intensive Care Unit, Department of Woman's and Child's Health, Padova University Hospital (Italy). A urine sample was obtained from each patient within 24 h of birth; Mass Spectrometry-based untargeted metabolomics analysis was then conducted. We searched for any significant disparities in the metabolomic profile of preterm newborns subjected to antenatal corticosteroid (ACS) treatment at varying timings; their correlation with clinical outcomes were also evaluated. The group receiving ACS within the optimal time window (1-7 days before delivery) exhibited elevated levels of cysteine, N-acetylglutamine, propionyl carnitine and 5-hydroxyindolacetic acid, coupled with a decrease in pipecolic acid. Clinically, this group demonstrated a reduced need for invasive ventilation (p = 0.04). In conclusion, metabolomics analysis identified several metabolites that discriminated preterm infants whose mothers received ACS within the recommended time window. Elevated levels of cysteine and 5-Hydroxyindoleacetic acid, metabolites characterized by antioxidant and anti-inflammatory properties, were observed in these infants. This metabolic profile correlated with improved respiratory outcomes, as evidenced by a reduced necessity for invasive ventilation at birth.
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Affiliation(s)
- Enrico Valerio
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
| | - Marta Meneghelli
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
| | - Matteo Stocchero
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
| | - Alfonso Galderisi
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
- Department of Pediatrics, Yale School of Medicine, Yale University, New Haven, CT 06511, USA
| | - Silvia Visentin
- Obstetrics and Gynecology, Department of Women’s and Children’s Health, University of Padova, 35128 Padova, Italy;
| | - Luca Bonadies
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
| | - Paola Pirillo
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
| | - Gabriele Poloniato
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
| | - Giuseppe Giordano
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
| | - Eugenio Baraldi
- Neonatal Intensive Care Unit, Department of Womens’ and Children’s Health, Azienda Ospedale-Università di Padova, 35128 Padova, Italy; (M.M.); (M.S.); (L.B.); (P.P.); (G.P.); (G.G.); (E.B.)
- Institute of Pediatric Research “Città della Speranza”, 35127 Padova, Italy;
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Perez-Gianmarco L, Kukley M. Understanding the Role of the Glial Scar through the Depletion of Glial Cells after Spinal Cord Injury. Cells 2023; 12:1842. [PMID: 37508505 PMCID: PMC10377788 DOI: 10.3390/cells12141842] [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: 05/22/2023] [Revised: 06/30/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Spinal cord injury (SCI) is a condition that affects between 8.8 and 246 people in a million and, unlike many other neurological disorders, it affects mostly young people, causing deficits in sensory, motor, and autonomic functions. Promoting the regrowth of axons is one of the most important goals for the neurological recovery of patients after SCI, but it is also one of the most challenging goals. A key event after SCI is the formation of a glial scar around the lesion core, mainly comprised of astrocytes, NG2+-glia, and microglia. Traditionally, the glial scar has been regarded as detrimental to recovery because it may act as a physical barrier to axon regrowth and release various inhibitory factors. However, more and more evidence now suggests that the glial scar is beneficial for the surrounding spared tissue after SCI. Here, we review experimental studies that used genetic and pharmacological approaches to ablate specific populations of glial cells in rodent models of SCI in order to understand their functional role. The studies showed that ablation of either astrocytes, NG2+-glia, or microglia might result in disorganization of the glial scar, increased inflammation, extended tissue degeneration, and impaired recovery after SCI. Hence, glial cells and glial scars appear as important beneficial players after SCI.
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Affiliation(s)
- Lucila Perez-Gianmarco
- Achucarro Basque Center for Neuroscience, 48940 Leioa, PC, Spain
- Department of Neurosciences, University of the Basque Country, 48940 Leioa, PC, Spain
| | - Maria Kukley
- Achucarro Basque Center for Neuroscience, 48940 Leioa, PC, Spain
- IKERBASQUE Basque Foundation for Science, 48009 Bilbao, PC, Spain
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Al-Rooqi MM, Ullah Mughal E, Raja QA, Obaid RJ, Sadiq A, Naeem N, Qurban J, Asghar BH, Moussa Z, Ahmed SA. Recent advancements on the synthesis and biological significance of pipecolic acid and its derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Xu B, Li F, Zhang W, Su Y, Tang L, Li P, Joshi J, Yang A, Li D, Wang Z, Wang S, Xie J, Gu H, Zhu W. Identification of metabolic pathways underlying FGF1 and CHIR99021-mediated cardioprotection. iScience 2022; 25:104447. [PMID: 35707727 PMCID: PMC9189130 DOI: 10.1016/j.isci.2022.104447] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 04/16/2022] [Accepted: 05/18/2022] [Indexed: 12/05/2022] Open
Abstract
Acute myocardial infarction is a leading cause of death worldwide. We have previously identified two cardioprotective molecules — FGF1 and CHIR99021— that confer cardioprotection in mouse and pig models of acute myocardial infarction. Here, we aimed to determine if improved myocardial metabolism contributes to this cardioprotection. Nanofibers loaded with FGF1 and CHIR99021 were intramyocardially injected to ischemic myocardium of adult mice immediately following surgically induced myocardial infarction. Animals were euthanized 3 and 7 days later. Our data suggested that FGF1/CHIR99021 nanofibers enhanced the heart’s capacity to utilize glycolysis as an energy source and reduced the accumulation of branched-chain amino acids in ischemic myocardium. The impact of FGF1/CHIR99021 on metabolism was more obvious in the first three days post myocardial infarction. Taken together, these findings suggest that FGF1/CHIR99021 protects the heart against ischemic injury via improving myocardial metabolism which may be exploited for treatment of acute myocardial infarction in humans. FGF1/CHIR confer cardioprotection in myocardial infarction animals FGF1/CHIR enhance the capability of ischemic hearts to produce energy via glycolysis FGF1/CHIR reduce the abundance of branched chain amino acids in ischemic hearts This study reveals a novel approach to correct metabolic disorders in ischemic hearts
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Affiliation(s)
- Bing Xu
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259.,Department of Cardiology, Northern Jiangsu People's Hospital, Clinical Medical College, Yangzhou University, Yangzhou 225001, China
| | - Fan Li
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259.,Department of Kinesiology, South China Normal University, Guangzhou 510631, China
| | - Wenjing Zhang
- Center for Translational Science, Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Port St. Lucie, FL 34987, USA.,College of Health Solutions, Arizona State University, Phoenix, AZ 85287, USA
| | - Yajuan Su
- Department of Surgery, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ling Tang
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259
| | - Pengsheng Li
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259
| | - Jyotsna Joshi
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259
| | - Aaron Yang
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259
| | - Dong Li
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259
| | - Zhao Wang
- Department of Diabetes and Cancer Metabolism, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Shu Wang
- College of Health Solutions, Arizona State University, Phoenix, AZ 85287, USA
| | - Jingwei Xie
- Department of Surgery, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Haiwei Gu
- Center for Translational Science, Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Port St. Lucie, FL 34987, USA.,College of Health Solutions, Arizona State University, Phoenix, AZ 85287, USA
| | - Wuqiang Zhu
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259
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Lahham M, Jha S, Goj D, Macheroux P, Wallner S. The family of sarcosine oxidases: Same reaction, different products. Arch Biochem Biophys 2021; 704:108868. [PMID: 33812916 DOI: 10.1016/j.abb.2021.108868] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/26/2021] [Accepted: 03/27/2021] [Indexed: 12/11/2022]
Abstract
The subfamily of sarcosine oxidase is a set of enzymes within the larger family of amine oxidases. It is ubiquitously distributed among different kingdoms of life. The member enzymes catalyze the oxidization of an N-methyl amine bond of amino acids to yield unstable imine species that undergo subsequent spontaneous non-enzymatic reactions, forming an array of different products. These products range from demethylated simple species to complex alkaloids. The enzymes belonging to the sarcosine oxidase family, namely, monomeric and heterotetrameric sarcosine oxidase, l-pipecolate oxidase, N-methyltryptophan oxidase, NikD, l-proline dehydrogenase, FsqB, fructosamine oxidase and saccharopine oxidase have unique features differentiating them from other amine oxidases. This review highlights the key attributes of the sarcosine oxidase family enzymes, in terms of their substrate binding motif, type of oxidation reaction mediated and FAD regeneration, to define the boundaries of this group and demarcate these enzymes from other amine oxidase families.
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Affiliation(s)
- Majd Lahham
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria; Department of Biochemistry and Microbiology, Aljazeera Private University, Ghabagheb, Syria
| | - Shalinee Jha
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Dominic Goj
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Peter Macheroux
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Silvia Wallner
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria.
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Hippocampal Sector-Specific Metabolic Profiles Reflect Endogenous Strategy for Ischemia-Reperfusion Insult Resistance. Mol Neurobiol 2020; 58:1621-1633. [PMID: 33222147 PMCID: PMC7932963 DOI: 10.1007/s12035-020-02208-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/12/2020] [Indexed: 11/16/2022]
Abstract
The gerbil is a well-known model for studying cerebral ischemia. The CA1 of the hippocampus is vulnerable to 5 min of ischemia, while the CA2–4 and dentate gyrus (DG) are resistant to it. Short-lasting ischemia, a model of transient ischemic attacks in men, results in CA1 neuron death within 2–4 days of reperfusion. Untargeted metabolomics, using LC-QTOF-MS, was used to enrich the knowledge about intrinsic vulnerability and resistance of hippocampal regions and their early post-ischemic response (IR). In total, 30 significant metabolites were detected. In controls, taurine was significantly lower and guanosine monophosphate was higher in CA1, as compared to that in CA2–4,DG. LysoPG and LysoPE were more abundant in CA1, while LysoPI 18:0 was detected only in CA2–4,DG. After IR, a substantial decrease in the citric acid level in CA1, an accumulation of pipecolic acid in both regions, and opposite changes in the amount of PE and LysoPE were observed. The following metabolic pathways were identified as being differentially active in control CA1 vs. CA2–4,DG: metabolism of taurine and hypotaurine, glycerophospholipid, and purine. These results may indicate that a regulation of cell volume, altered structure of cell membranes, and energy metabolism differentiate hippocampal regions. Early post-ischemia, spatial differences in the metabolism of aminoacyl-tRNA biosynthesis, and amino acids and their metabolites with a predominance of those which upkeep their well-being in CA2–4,DG are shown. Presented results are consistent with genetic, morphological, and functional data, which may be useful in further study on endogenous mechanisms of neuroprotection and search for new targets for therapeutic interventions.
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Lukasheva EV, Makletsova MG, Lukashev AN, Babayeva G, Arinbasarova AY, Medentsev AG. Fungal Enzyme l-Lysine α-Oxidase Affects the Amino Acid Metabolism in the Brain and Decreases the Polyamine Level. Pharmaceuticals (Basel) 2020; 13:E398. [PMID: 33212812 PMCID: PMC7698073 DOI: 10.3390/ph13110398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/08/2020] [Accepted: 11/14/2020] [Indexed: 11/16/2022] Open
Abstract
The fungal glycoprotein l-lysine α-oxidase (LO) catalyzes the oxidative deamination of l-lysine (l-lys). LO may be internalized in the intestine and shows antitumor, antibacterial, and antiviral effects in vivo. The main mechanisms of its effects have been shown to be depletion of the essential amino acid l-lys and action of reactive oxidative species produced by the reaction. Here, we report that LO penetrates into the brain and is retained there for up to 48 h after intravenous injection, which might be explained by specific pharmacokinetics. LO actively intervenes in amino acid metabolism in the brain. The most significant impact of LO was towards amino acids, which are directly exposed to its action (l-lys, l-orn, l-arg). In addition, the enzyme significantly affected the redistribution of amino acids directly associated with the tricarboxylic acid (TCA) cycle (l-asp and l-glu). We discovered that the depletion of l-orn, the precursor of polyamines (PA), led to a significant and long-term decrease in the concentration of polyamines, which are responsible for regulation of many processes including cell proliferation. Thus, LO may be used to reduce levels of l-lys and PA in the brain.
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Affiliation(s)
- Elena V. Lukasheva
- Department of Biochemistry, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St., Moscow 117198, Russia;
| | - Marina G. Makletsova
- Department of Biology and General Pathology, Don State Technical University, Gagarin Square 1, Rostov-on-Don 344011, Russia;
| | - Alexander N. Lukashev
- Martsinovsky Institute of Medical Parasitology, Tropical and Vector Borne Diseases, I.M. Sechenov First Moscow State Medical University (Sechenov University), 20 M. Pirogovskaya str., Moscow 119435, Russia;
| | - Gulalek Babayeva
- Department of Biochemistry, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St., Moscow 117198, Russia;
| | - Anna Yu. Arinbasarova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, PSCBR RAS, 5 Pr. Nauki, Pushchino, Moscow Region 142290, Russia; (A.Y.A.); (A.G.M.)
| | - Alexander G. Medentsev
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, PSCBR RAS, 5 Pr. Nauki, Pushchino, Moscow Region 142290, Russia; (A.Y.A.); (A.G.M.)
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Central regulation of feeding behavior through neuropeptides and amino acids in neonatal chicks. Amino Acids 2019; 51:1129-1152. [DOI: 10.1007/s00726-019-02762-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 07/05/2019] [Indexed: 10/26/2022]
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Ottestad-Hansen S, Hu QX, Follin-Arbelet VV, Bentea E, Sato H, Massie A, Zhou Y, Danbolt NC. The cystine-glutamate exchanger (xCT, Slc7a11) is expressed in significant concentrations in a subpopulation of astrocytes in the mouse brain. Glia 2018; 66:951-970. [DOI: 10.1002/glia.23294] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 12/28/2017] [Accepted: 01/02/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Sigrid Ottestad-Hansen
- The Neurotransporter Group, Section of Anatomy, Department of Molecular Medicine; Institute of Basic Medical Sciences, University of Oslo; Oslo 0317 Norway
| | - Qiu Xiang Hu
- The Neurotransporter Group, Section of Anatomy, Department of Molecular Medicine; Institute of Basic Medical Sciences, University of Oslo; Oslo 0317 Norway
| | - Virgine Veronique Follin-Arbelet
- The Neurotransporter Group, Section of Anatomy, Department of Molecular Medicine; Institute of Basic Medical Sciences, University of Oslo; Oslo 0317 Norway
| | - Eduard Bentea
- Department of Pharmaceutical Biotechnology and Molecular Biology; Center for Neurosciences, Vrije Universiteit Brussel; Brussels 1090 Belgium
| | - Hideyo Sato
- Laboratory of Biochemistry and Molecular Biology, Department of Medical Technology; Niigata University; Niigata Niigata Prefecture 950-2181 Japan
| | - Ann Massie
- Department of Pharmaceutical Biotechnology and Molecular Biology; Center for Neurosciences, Vrije Universiteit Brussel; Brussels 1090 Belgium
| | - Yun Zhou
- The Neurotransporter Group, Section of Anatomy, Department of Molecular Medicine; Institute of Basic Medical Sciences, University of Oslo; Oslo 0317 Norway
| | - Niels Christian Danbolt
- The Neurotransporter Group, Section of Anatomy, Department of Molecular Medicine; Institute of Basic Medical Sciences, University of Oslo; Oslo 0317 Norway
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Lin H, Levison BS, Buffa JA, Huang Y, Fu X, Wang Z, Gogonea V, DiDonato JA, Hazen SL. Myeloperoxidase-mediated protein lysine oxidation generates 2-aminoadipic acid and lysine nitrile in vivo. Free Radic Biol Med 2017; 104:20-31. [PMID: 28069522 PMCID: PMC5353359 DOI: 10.1016/j.freeradbiomed.2017.01.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 12/29/2016] [Accepted: 01/05/2017] [Indexed: 12/13/2022]
Abstract
Recent studies reveal 2-aminoadipic acid (2-AAA) is both elevated in subjects at risk for diabetes and mechanistically linked to glucose homeostasis. Prior studies also suggest enrichment of protein-bound 2-AAA as an oxidative post-translational modification of lysyl residues in tissues associated with degenerative diseases of aging. While in vitro studies suggest redox active transition metals or myeloperoxidase (MPO) generated hypochlorous acid (HOCl) may produce protein-bound 2-AAA, the mechanism(s) responsible for generation of 2-AAA during inflammatory diseases are unknown. In initial studies we observed that traditional acid- or base-catalyzed protein hydrolysis methods previously employed to measure tissue 2-AAA can artificially generate protein-bound 2-AAA from an alternative potential lysine oxidative product, lysine nitrile (LysCN). Using a validated protease-based digestion method coupled with stable isotope dilution LC/MS/MS, we now report protein bound 2-AAA and LysCN are both formed by hypochlorous acid (HOCl) and the MPO/H2O2/Cl- system of leukocytes. At low molar ratio of oxidant to target protein Nε-lysine moiety, 2-AAA is formed via an initial Nε-monochloramine intermediate, which ultimately produces the more stable 2-AAA end-product via sequential generation of transient imine and semialdehyde intermediates. At higher oxidant to target protein Nε-lysine amine ratios, protein-bound LysCN is formed via initial generation of a lysine Nε-dichloramine intermediate. In studies employing MPO knockout mice and an acute inflammation model, we show that both free and protein-bound 2-AAA, and in lower yield, protein-bound LysCN, are formed by MPO in vivo during inflammation. Finally, both 2-AAA and to lesser extent LysCN are shown to be enriched in human aortic atherosclerotic plaque, a tissue known to harbor multiple MPO-catalyzed protein oxidation products. Collectively, these results show that MPO-mediated oxidation of protein lysyl residues serves as a mechanism for producing 2-AAA and LysCN in vivo. These studies further support involvement of MPO-catalyzed oxidative processes in both the development of atherosclerosis and diabetes risk.
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Affiliation(s)
- Hongqiao Lin
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Department of Chemistry, Cleveland State University, Cleveland, OH 44115, United States
| | - Bruce S Levison
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Jennifer A Buffa
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Ying Huang
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Xiaoming Fu
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Zeneng Wang
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Valentin Gogonea
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States; Department of Chemistry, Cleveland State University, Cleveland, OH 44115, United States
| | - Joseph A DiDonato
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Stanley L Hazen
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States; Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, United States; Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH 44195, United States.
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Reciprocal Control of Thyroid Binding and the Pipecolate Pathway in the Brain. Neurochem Res 2016; 42:217-243. [DOI: 10.1007/s11064-016-2015-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/15/2016] [Accepted: 07/22/2016] [Indexed: 12/21/2022]
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Massie A, Boillée S, Hewett S, Knackstedt L, Lewerenz J. Main path and byways: non-vesicular glutamate release by system xc(-) as an important modifier of glutamatergic neurotransmission. J Neurochem 2015; 135:1062-79. [PMID: 26336934 DOI: 10.1111/jnc.13348] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/24/2015] [Accepted: 08/25/2015] [Indexed: 12/14/2022]
Abstract
System xc(-) is a cystine/glutamate antiporter that exchanges extracellular cystine for intracellular glutamate. Cystine is intracellularly reduced to cysteine, a building block of GSH. As such, system xc(-) can regulate the antioxidant capacity of cells. Moreover, in several brain regions, system xc(-) is the major source of extracellular glutamate. As such this antiporter is able to fulfill key physiological functions in the CNS, while evidence indicates it also plays a role in certain brain pathologies. Since the transcription of xCT, the specific subunit of system xc(-), is enhanced by the presence of reactive oxygen species and inflammatory cytokines, system xc(-) could be involved in toxic extracellular glutamate release in neurological disorders that are associated with increased oxidative stress and neuroinflammation. System xc(-) has also been reported to contribute to the invasiveness of brain tumors and, as a source of extracellular glutamate, could participate in the induction of peritumoral seizures. Two independent reviews (Pharmacol. Rev. 64, 2012, 780; Antioxid. Redox Signal. 18, 2013, 522), approached from a different perspective, have recently been published on the functions of system xc(-) in the CNS. In this review, we highlight novel achievements and insights covering the regulation of system xc(-) as well as its involvement in emotional behavior, cognition, addiction, neurological disorders and glioblastomas, acquired in the past few years. System xc(-) constitutes an important source of extrasynaptic glutamate in the brain. By modulating the tone of extrasynaptic metabotropic or ionotropic glutamate receptors, it affects excitatory neurotransmission, the threshold for overexcitation and excitotoxicity and, as a consequence, behavior. This review describes the current knowledge of how system xc(-) is regulated and involved in physiological as well as pathophysiological brain functioning.
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Affiliation(s)
- Ann Massie
- Department of Pharmaceutical Biotechnology and Molecular Biology, Center for Neurosciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Séverine Boillée
- Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Sandra Hewett
- Department of Biology, Program in Neuroscience, Syracuse University, Syracuse, New York, USA
| | - Lori Knackstedt
- Psychology Department, University of Florida, Gainesville, Florida, USA
| | - Jan Lewerenz
- Department of Neurology, Ulm University, Oberer Eselsberg 45, Ulm, Germany
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14
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Guerra ENS, Acevedo AC, Leite AF, Gozal D, Chardin H, De Luca Canto G. Diagnostic capability of salivary biomarkers in the assessment of head and neck cancer: A systematic review and meta-analysis. Oral Oncol 2015; 51:805-18. [DOI: 10.1016/j.oraloncology.2015.06.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 06/20/2015] [Indexed: 11/29/2022]
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15
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Furuse M. Screening of central functions of amino acids and their metabolites for sedative and hypnotic effects using chick models. Eur J Pharmacol 2015; 762:382-93. [DOI: 10.1016/j.ejphar.2015.06.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 11/29/2022]
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16
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Perera T, Young MR, Zhang Z, Murphy G, Colburn NH, Lanza E, Hartman TJ, Cross AJ, Bobe G. Identification and monitoring of metabolite markers of dry bean consumption in parallel human and mouse studies. Mol Nutr Food Res 2015; 59:795-806. [PMID: 25641932 DOI: 10.1002/mnfr.201400847] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 12/22/2014] [Accepted: 12/31/2014] [Indexed: 12/14/2022]
Abstract
SCOPE Aim of the study was to identify and monitor metabolite markers of dry bean consumption in parallel human and mouse studies that each had shown chemopreventive effects of dry bean consumption on colorectal neoplasia risk. METHODS AND RESULTS Using LC/mass spectroscopy ± ESI and GC/mass spectroscopy, serum metabolites of dry beans were measured in 46 men before and after a 4-week dry bean enriched diet (250 g/day) and 12 mice that received a standardized diet containing either 0 or 10% navy bean ethanol extract for 6 weeks; we also investigated fecal metabolites in the mice. The serum metabolites identified in these controlled feeding studies were then investigated in 212 polyp-free participants from the Polyp Prevention Trial who self-reported either increased (≥+31 g/day from baseline), high dry bean intake of ≥42 g/day in year 3 or low, unchanged dry bean consumption of <8 g/day; serum was analyzed from baseline and year 3. Serum pipecolic acid and S-methyl cysteine were elevated after dry bean consumption in human and mouse studies and reflected dry bean consumption in the Polyp Prevention Trial. CONCLUSION Serum levels of pipecolic acid and S-methyl cysteine are useful biomarkers of dry bean consumption.
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Affiliation(s)
- Thushanthi Perera
- Linus Pauling Institute and Department of Animal and Rangeland Sciences, Oregon State University, Corvallis, OR, USA
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17
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Krzyżanowska W, Pomierny B, Filip M, Pera J. Glutamate transporters in brain ischemia: to modulate or not? Acta Pharmacol Sin 2014; 35:444-62. [PMID: 24681894 DOI: 10.1038/aps.2014.1] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 01/03/2014] [Indexed: 01/18/2023] Open
Abstract
In this review, we briefly describe glutamate (Glu) metabolism and its specific transports and receptors in the central nervous system (CNS). Thereafter, we focus on excitatory amino acid transporters, cystine/glutamate antiporters (system xc-) and vesicular glutamate transporters, specifically addressing their location and roles in CNS and the molecular mechanisms underlying the regulation of Glu transporters. We provide evidence from in vitro or in vivo studies concerning alterations in Glu transporter expression in response to hypoxia or ischemia, including limited human data that supports the role of Glu transporters in stroke patients. Moreover, the potential to induce brain tolerance to ischemia through modulation of the expression and/or activities of Glu transporters is also discussed. Finally we present strategies involving the application of ischemic preconditioning and pharmacological agents, eg β-lactam antibiotics, amitriptyline, riluzole and N-acetylcysteine, which result in the significant protection of nervous tissues against ischemia.
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18
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Scientific opinion on the safety and efficacy of L‐tryptophan produced by Escherichia coli (FERM BP‐11200) for all animal species based on a dossier submitted by Ajinomoto Eurolysine SAS. EFSA J 2013. [DOI: 10.2903/j.efsa.2013.3368] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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19
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Lewerenz J, Hewett SJ, Huang Y, Lambros M, Gout PW, Kalivas PW, Massie A, Smolders I, Methner A, Pergande M, Smith SB, Ganapathy V, Maher P. The cystine/glutamate antiporter system x(c)(-) in health and disease: from molecular mechanisms to novel therapeutic opportunities. Antioxid Redox Signal 2013; 18:522-55. [PMID: 22667998 PMCID: PMC3545354 DOI: 10.1089/ars.2011.4391] [Citation(s) in RCA: 666] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The antiporter system x(c)(-) imports the amino acid cystine, the oxidized form of cysteine, into cells with a 1:1 counter-transport of glutamate. It is composed of a light chain, xCT, and a heavy chain, 4F2 heavy chain (4F2hc), and, thus, belongs to the family of heterodimeric amino acid transporters. Cysteine is the rate-limiting substrate for the important antioxidant glutathione (GSH) and, along with cystine, it also forms a key redox couple on its own. Glutamate is a major neurotransmitter in the central nervous system (CNS). By phylogenetic analysis, we show that system x(c)(-) is a rather evolutionarily new amino acid transport system. In addition, we summarize the current knowledge regarding the molecular mechanisms that regulate system x(c)(-), including the transcriptional regulation of the xCT light chain, posttranscriptional mechanisms, and pharmacological inhibitors of system x(c)(-). Moreover, the roles of system x(c)(-) in regulating GSH levels, the redox state of the extracellular cystine/cysteine redox couple, and extracellular glutamate levels are discussed. In vitro, glutamate-mediated system x(c)(-) inhibition leads to neuronal cell death, a paradigm called oxidative glutamate toxicity, which has successfully been used to identify neuroprotective compounds. In vivo, xCT has a rather restricted expression pattern with the highest levels in the CNS and parts of the immune system. System x(c)(-) is also present in the eye. Moreover, an elevated expression of xCT has been reported in cancer. We highlight the diverse roles of system x(c)(-) in the regulation of the immune response, in various aspects of cancer and in the eye and the CNS.
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Affiliation(s)
- Jan Lewerenz
- Department of Neurology, University of Ulm, Ulm, Germany.
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20
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Strauss KA, Brumbaugh J, Duffy A, Wardley B, Robinson D, Hendrickson C, Tortorelli S, Moser AB, Puffenberger EG, Rider NL, Morton DH. Safety, efficacy and physiological actions of a lysine-free, arginine-rich formula to treat glutaryl-CoA dehydrogenase deficiency: focus on cerebral amino acid influx. Mol Genet Metab 2011; 104:93-106. [PMID: 21820344 DOI: 10.1016/j.ymgme.2011.07.003] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2011] [Accepted: 07/03/2011] [Indexed: 02/03/2023]
Abstract
Striatal degeneration from glutaryl-CoA dehydrogenase deficiency (glutaric aciduria type 1, GA1) is associated with cerebral formation and entrapment of glutaryl-CoA and its derivatives that depend on cerebral lysine influx. In 2006 we designed a lysine-free study formula enriched with arginine to selectively block lysine transport across cerebral endothelia and thereby limit glutaryl-CoA production by brain. Between 2006 and present, we treated twelve consecutive children with study formula (LYSx group) while holding all other treatment practices constant. Clinical and biochemical outcomes were compared to 25 GA1 patients (PROx group) treated between 1995 and 2005 with natural protein restriction (dietary lysine/arginine ratio of 1.7±0.3 mg:mg). We used published kinetic parameters of the y+and LAT1 blood-brain barrier transporters to model the influx of amino acids into the brain. Arginine fortification to achieve a mean dietary lysine/arginine ratio of 0.7±0.2 mg:mg was neuroprotective. All 12 LYSx patients are physically and neurologically healthy after 28 aggregate patient-years of follow up (current ages 28±21 months) and there were no adverse events related to formula use. This represents a 36% reduction of neurological risk (95% confidence interval 14-52%, p=0.018) that we can directly attribute to altered amino acid intake. During the first year of life, 20% lower lysine intake and two-fold higher arginine intake by LYSx patients were associated with 50% lower plasma lysine, 3-fold lower plasma lysine/arginine concentration ratio, 42% lower mean calculated cerebral lysine influx, 54% higher calculated cerebral arginine influx, 15-26% higher calculated cerebral influx of several anaplerotic precursors (isoleucine, threonine, methionine, and leucine), 50% less 3-hydroxyglutarate excretion, and a 3-fold lower hospitalization rate (0.8 versus 2.3 hospitalizations per patient per year). The relationship between arginine fortification and plasma lysine indicates that transport competition exists at both cerebrovascular and gastrointestinal barriers, suggesting their co-administration is key to efficacy. Monitoring the ratio between lysine and arginine in diet and plasma may prove a useful strategy for treating children with GA1.
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Pink DB, Gatrell SK, Elango R, Turchinsky J, Kiess AS, Blemings KP, Dixon WT, Ball RO. Lysine α-ketoglutarate reductase, but not saccharopine dehydrogenase, is subject to substrate inhibition in pig liver. Nutr Res 2011; 31:544-54. [DOI: 10.1016/j.nutres.2011.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 05/31/2011] [Accepted: 06/07/2011] [Indexed: 10/17/2022]
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22
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Lewerenz J, Maher P, Methner A. Regulation of xCT expression and system x (c) (-) function in neuronal cells. Amino Acids 2011; 42:171-9. [PMID: 21369940 DOI: 10.1007/s00726-011-0862-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 02/17/2011] [Indexed: 12/14/2022]
Abstract
The glutamate/cystine antiporter system x(c)(-) transports cystine into cells in exchange for glutamate at a ratio of 1:1. It is composed of a specific light chain, xCT, and a heavy chain, 4F2, linked by a disulfide bridge. Intracellularly, cystine is reduced into cysteine, the rate-limiting precursor of glutathione (GSH), an important small molecule antioxidant. Several lines of evidence suggest that the expression of xCT and thereby the presence system x(c)(-) activity plays an important role in the brain. First, it regulates extracellular glutamate concentrations. Second, as brain is prone to oxidative stress due to its high oxygen consumption and lipid content, system x(c)(-) by favoring GSH synthesis, may prevent oxidative damage. Thus, to understand how xCT expression and system x(c)(-) activity are regulated in the central nervous system is of utmost importance. In this review, we will summarize the current knowledge about the molecular basis by which xCT expression and system x(c)(-) activity are regulated in neuronal cell lines, especially the hippocampal cell line, HT22. In addition, we will relate these pathways to findings in other cell types, especially those found in the central nervous system. We will focus on the signaling pathways that modulate the transcription of the xCT gene. Furthermore, we describe possible pathways that modify system x(c)(-) activity beyond the level of xCT transcription, including regulation on the level of membrane trafficking and substrate availability, especially the regulation by glutamate transport through excitatory amino acid transporters.
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Affiliation(s)
- Jan Lewerenz
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20241, Hamburg, Germany.
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23
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Araújo WL, Ishizaki K, Nunes-Nesi A, Larson TR, Tohge T, Krahnert I, Witt S, Obata T, Schauer N, Graham IA, Leaver CJ, Fernie AR. Identification of the 2-hydroxyglutarate and isovaleryl-CoA dehydrogenases as alternative electron donors linking lysine catabolism to the electron transport chain of Arabidopsis mitochondria. THE PLANT CELL 2010; 22:1549-63. [PMID: 20501910 PMCID: PMC2899879 DOI: 10.1105/tpc.110.075630] [Citation(s) in RCA: 240] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 05/05/2010] [Accepted: 05/10/2010] [Indexed: 05/17/2023]
Abstract
The process of dark-induced senescence in plants is relatively poorly understood, but a functional electron-transfer flavoprotein/electron-transfer flavoprotein:ubiquinone oxidoreductase (ETF/ETFQO) complex, which supports respiration during carbon starvation, has recently been identified. Here, we studied the responses of Arabidopsis thaliana mutants deficient in the expression of isovaleryl-CoA dehydrogenase and 2-hydroxyglutarate dehydrogenase to extended darkness and other environmental stresses. Evaluations of the mutant phenotypes following carbon starvation induced by extended darkness identify similarities to those exhibited by mutants of the ETF/ETFQO complex. Metabolic profiling and isotope tracer experimentation revealed that isovaleryl-CoA dehydrogenase is involved in degradation of the branched-chain amino acids, phytol, and Lys, while 2-hydroxyglutarate dehydrogenase is involved exclusively in Lys degradation. These results suggest that isovaleryl-CoA dehydrogenase is the more critical for alternative respiration and that a series of enzymes, including 2-hydroxyglutarate dehydrogenase, plays a role in Lys degradation. Both physiological and metabolic phenotypes of the isovaleryl-CoA dehydrogenase and 2-hydroxyglutarate dehydrogenase mutants were not as severe as those observed for mutants of the ETF/ETFQO complex, indicating some functional redundancy of the enzymes within the process. Our results aid in the elucidation of the pathway of plant Lys catabolism and demonstrate that both isovaleryl-CoA dehydrogenase and 2-hydroxyglutarate dehydrogenase act as electron donors to the ubiquinol pool via an ETF/ETFQO-mediated route.
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Affiliation(s)
- Wagner L. Araújo
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | | | - Adriano Nunes-Nesi
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | - Tony R. Larson
- Department of Biology, Centre for Novel Agricultural Products, University of York, Heslington, York YO10 5YW, United Kingdom
| | - Takayuki Tohge
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | - Ina Krahnert
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | - Sandra Witt
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | - Toshihiro Obata
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | - Nicolas Schauer
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
| | - Ian A. Graham
- Department of Biology, Centre for Novel Agricultural Products, University of York, Heslington, York YO10 5YW, United Kingdom
| | | | - Alisdair R. Fernie
- Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany
- Address correspondence to
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Brocker C, Lassen N, Estey T, Pappa A, Cantore M, Orlova VV, Chavakis T, Kavanagh KL, Oppermann U, Vasiliou V. Aldehyde dehydrogenase 7A1 (ALDH7A1) is a novel enzyme involved in cellular defense against hyperosmotic stress. J Biol Chem 2010; 285:18452-63. [PMID: 20207735 DOI: 10.1074/jbc.m109.077925] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Mammalian ALDH7A1 is homologous to plant ALDH7B1, an enzyme that protects against various forms of stress, such as salinity, dehydration, and osmotic stress. It is known that mutations in the human ALDH7A1 gene cause pyridoxine-dependent and folic acid-responsive seizures. Herein, we show for the first time that human ALDH7A1 protects against hyperosmotic stress by generating osmolytes and metabolizing toxic aldehydes. Human ALDH7A1 expression in Chinese hamster ovary cells attenuated osmotic stress-induced apoptosis caused by increased extracellular concentrations of sucrose or sodium chloride. Purified recombinant ALDH7A1 efficiently metabolized a number of aldehyde substrates, including the osmolyte precursor, betaine aldehyde, lipid peroxidation-derived aldehydes, and the intermediate lysine degradation product, alpha-aminoadipic semialdehyde. The crystal structure for ALDH7A1 supports the enzyme's substrate specificities. Tissue distribution studies in mice showed the highest expression of ALDH7A1 protein in liver, kidney, and brain, followed by pancreas and testes. ALDH7A1 protein was found in the cytosol, nucleus, and mitochondria, making it unique among the aldehyde dehydrogenase enzymes. Analysis of human and mouse cDNA sequences revealed mitochondrial and cytosolic transcripts that are differentially expressed in a tissue-specific manner in mice. In conclusion, ALDH7A1 is a novel aldehyde dehydrogenase expressed in multiple subcellular compartments that protects against hyperosmotic stress by generating osmolytes and metabolizing toxic aldehydes.
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Affiliation(s)
- Chad Brocker
- Department of Pharmaceutical Sciences, University of Colorado Denver, Aurora, Colorado 80045, USA
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25
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Struys EA, Jakobs C. Metabolism of lysine in alpha-aminoadipic semialdehyde dehydrogenase-deficient fibroblasts: evidence for an alternative pathway of pipecolic acid formation. FEBS Lett 2010; 584:181-6. [PMID: 19932104 DOI: 10.1016/j.febslet.2009.11.055] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 11/03/2009] [Accepted: 11/16/2009] [Indexed: 11/30/2022]
Abstract
The mammalian degradation of lysine is believed to proceed via two distinct routes, the saccharopine and the pipecolic acid routes, that ultimately converge at the level of alpha-aminoadipic semialdehyde (alpha-AASA). alpha-AASA dehydrogenase-deficient fibroblasts were grown in cell culture medium supplemented with either L-[alpha-(15)N]lysine or L-[epsilon-(15)N]lysine to explore the exact route of lysine degradation. L-[alpha-(15)N]lysine was catabolised into [(15)N]saccharopine, [(15)N]alpha-AASA, [(15)N]Delta(1)-piperideine-6-carboxylate, and surprisingly in [(15)N]pipecolic acid, whereas L-[epsilon-(15)N]lysine resulted only in the formation of [(15)N]saccharopine. These results imply that lysine is exclusively degraded in fibroblasts via the saccharopine branch, and pipecolic acid originates from an alternative precursor. We hypothesize that pipecolic acid derives from Delta(1)-piperideine-6-carboxylate by the action of Delta(1)-pyrroline-5-carboxylic acid reductase, an enzyme involved in proline metabolism.
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Affiliation(s)
- Eduard A Struys
- Department of Clinical Chemistry, VU University Medical Center, Amsterdam, The Netherlands.
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26
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Substrate specificity and structure of human aminoadipate aminotransferase/kynurenine aminotransferase II. Biosci Rep 2008; 28:205-15. [PMID: 18620547 DOI: 10.1042/bsr20080085] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
KAT (kynurenine aminotransferase) II is a primary enzyme in the brain for catalysing the transamination of kynurenine to KYNA (kynurenic acid). KYNA is the only known endogenous antagonist of the N-methyl-D-aspartate receptor. The enzyme also catalyses the transamination of aminoadipate to alpha-oxoadipate; therefore it was initially named AADAT (aminoadipate aminotransferase). As an endotoxin, aminoadipate influences various elements of glutamatergic neurotransmission and kills primary astrocytes in the brain. A number of studies dealing with the biochemical and functional characteristics of this enzyme exist in the literature, but a systematic assessment of KAT II addressing its substrate profile and kinetic properties has not been performed. The present study examines the biochemical and structural characterization of a human KAT II/AADAT. Substrate screening of human KAT II revealed that the enzyme has a very broad substrate specificity, is capable of catalysing the transamination of 16 out of 24 tested amino acids and could utilize all 16 tested alpha-oxo acids as amino-group acceptors. Kinetic analysis of human KAT II demonstrated its catalytic efficiency for individual amino-group donors and acceptors, providing information as to its preferred substrate affinity. Structural analysis of the human KAT II complex with alpha-oxoglutaric acid revealed a conformational change of an N-terminal fraction, residues 15-33, that is able to adapt to different substrate sizes, which provides a structural basis for its broad substrate specificity.
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Le Corre L, Kizirian JC, Levraud C, Boucher JL, Bonnet V, Dhimane H. Diastereoselective functionalizations of enecarbamates derived from pipecolic acid towards 5-guanidinopipecolates as arginine mimetics. Org Biomol Chem 2008; 6:3388-98. [DOI: 10.1039/b805811c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Opinion of the Scientific Panel on Additives and Products or Substances used in Animal Feed on the safety and efficacy of L-lysine sulphate (Vitalys®Liquid and Dry) for all animal species. EFSA J 2007. [DOI: 10.2903/j.efsa.2007.522] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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29
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Plecko B, Hoeger H, Jakobs C, Struys E, Stromberger C, Leschnik M, Muehl A, Stoeckler-Ipsiroglu S. Pipecolic acid concentrations in brain tissue of nutritionally pyridoxine-deficient rats. J Inherit Metab Dis 2005; 28:689-93. [PMID: 16151899 DOI: 10.1007/s10545-005-0071-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Accepted: 02/22/2005] [Indexed: 11/28/2022]
Abstract
Elevated concentrations of pipecolic acid have been reported in plasma and CSF of patients with pyridoxine-dependent epilepsy, but its molecular background is unclear. To investigate any further association of pyridoxine and pipecolic acid metabolism, we have performed an animal trial and have measured the concentration of pipecolic acid in brain tissue of rats with nutritional pyridoxine deficiency and in control littermates. Concentrations of pyridoxal phosphate were significantly reduced in brain tissue of pyridoxine-deficient rats (p < 0.001), while concentrations of pipecolic acid were not significantly different from the normally nourished control group (p = 0.3). These data indicate that a direct association of pyridoxine and pipecolic acid metabolism is unlikely. We therefore assume that the characteristic elevation of pipecolic acid in pyridoxine-dependent epilepsy could rather be a secondary phenomenon with the primary defect of pyridoxine-dependent epilepsy being located outside the pipecolic acid pathway.
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Affiliation(s)
- B Plecko
- Department of Pediatrics, University Hospital Graz, Austria.
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Guidetti P, Schwarcz R. Determination of alpha-aminoadipic acid in brain, peripheral tissues, and body fluids using GC/MS with negative chemical ionization. ACTA ACUST UNITED AC 2004; 118:132-9. [PMID: 14559362 DOI: 10.1016/j.molbrainres.2003.08.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
alpha-Aminoadipic acid (alphaAA) is a structural homolog of the excitatory amino acid glutamate and a natural product of lysine metabolism in mammalian cells. Under experimental conditions, alphaAA can influence various elements of glutamatergic neurotransmission. Moreover, as a selective inhibitor of kynurenine aminotransferase II, alphaAA is capable of decreasing the levels of the neuroinhibitory metabolite kynurenic acid in the brain. We now describe the identification of this potential endogenous neuromodulator in tissues and body fluids by gas chromatography/mass spectrometry (GC/MS) analysis of its pentafluorobenzyl (PFB) derivative. alphaAA was recovered from the GC column with a retention time of approximately 7 min. Subsequent MS analysis using electron capture with negative ionization revealed two separate ions for alphaAA (m/z 520, approximately 45% and m/z 322, approximately 55%). Both of these ions were positively identified with two different GC methodologies. In the rat, alphaAA levels ranged from 5 to 30 microM in various brain areas and from 8 to 40 microM in peripheral organs, whereas serum and urine contained only 1-2 microM alphaAA. Levels in the human brain were 18.7+/-2.4 microM (cortex) and 18.0+/-1.7 microM (striatum) alphaAA (n=9 each), and the mouse forebrain contained 8.3+/-1.9 microM alphaAA (n=6). Neuronal depletion, caused in rats by an intrastriatal injection of NMDA (300 nmol/2.5 microl), did not alter the striatal content of alphaAA, indicating that brain alphaAA resides at least in part in glial cells. alphaAA may therefore function as a glia-derived modulator of excitatory neurotransmission.
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Affiliation(s)
- Paolo Guidetti
- Maryland Psychiatric Research Center, University of Maryland School of Medicine, P.O. Box 21247, Baltimore, MD 21228, USA
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Smriga M, Kameishi M, Uneyama H, Torii K. Dietary L-lysine deficiency increases stress-induced anxiety and fecal excretion in rats. J Nutr 2002; 132:3744-6. [PMID: 12468617 DOI: 10.1093/jn/132.12.3744] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Little is known about the psychobehavioral consequences of a dietary deficiency of the amino acid, L-lysine. This report demonstrates that a 4-d long L-lysine deficiency in rats interfered with the normal circadian release of the neurotransmitter serotonin, but not dopamine, measured by in vivo microdialysis in the central nucleus of the amygdala. L-Lysine deficiency was induced by feeding rats a L-lysine-deficient diet. Controls were pair-fed a L-lysine-sufficient diet. Footshock stress-induced anxiety, measured in an elevated plus-maze paradigm, and wrap-restraint stress-stimulated fecal excretion were significantly greater in the L-lysine-deficient rats than in the controls. We conclude that a severe deficiency of dietary L-lysine enhances serotonin release in the amygdala, with subsequent changes in psychobehavioral responses to stress.
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Affiliation(s)
- Miro Smriga
- Ajinomoto Company Incorporated, Institute of Life Sciences, 210-8681 Kawasaki, Japan.
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32
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Plecko B, St�ckler-Ipsiroglu S, Paschke E, Erwa W, Struys EA, Jakobs C. Pipecolic acid elevation in plasma and cerebrospinal fluid of two patients with pyridoxine-dependent epilepsy. Ann Neurol 2001. [DOI: 10.1002/1531-8249(200007)48:1<121::aid-ana20>3.0.co;2-v] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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33
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IJlst L, de Kromme I, Oostheim W, Wanders RJ. Molecular cloning and expression of human L-pipecolate oxidase. Biochem Biophys Res Commun 2000; 270:1101-5. [PMID: 10772957 DOI: 10.1006/bbrc.2000.2575] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In higher eukaryotes L-lysine can be degraded via two distinct routes including the saccharopine pathway and the L-pipecolate pathway. The saccharopine pathway is the primary route of degradation of lysine in most tissues except the brain in which the L-pipecolate pathway is most active. L-pipecolate is formed from L-lysine via two enzymatic reactions and then undergoes dehydrogenation to Delta(1)-piperideine-6-carboxylate. At least in humans and monkeys, this is brought about by the enzyme L-pipecolate oxidase (PIPOX) localized in peroxisomes. In literature, several patients have been described with hyperpipecolic acidaemia. The underlying mechanism responsible for the impaired degradation of pipecolate has remained unclear through the years. In order to resolve this question, we have now cloned the human L-pipecolate oxidase cDNA which codes for a protein of 390 amino acids and contains an ADP-betaalphabeta-binding fold compatible with its identity as a flavoprotein. Furthermore, the deduced protein ends in -KAHL at its carboxy terminus which constitutes a typical Type I peroxisomal-targeting signal (PTS I).
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Affiliation(s)
- L IJlst
- Department of Clinical Chemistry, Universtity of Amsterdam, Academic Medical Centre, Amsterdam, 1100 DE, The Netherlands
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34
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Hussain-Yusuf H, Onodera R, Nasser ME, Sato H. Simple method for the simultaneous analysis of pipecolic acid and lysine by high-performance liquid chromatography and its application to rumen liquor and plasma of ruminants. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1999; 735:63-72. [PMID: 10630891 DOI: 10.1016/s0378-4347(99)00399-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A high-performance liquid chromatography method for the simultaneous determination of pipecolic acid (Pip) and lysine (Lys), a precursor of Pip, in the rumen liquor and plasma of ruminant animals was established. Samples of rumen liquor and plasma were deproteinized with 50% acetonitrile and derivatized with a fluorescent agent 9-fluorenylmethyloxy carbonyl chloride (Fmoc-Cl). Chromatographic separation was achieved on a TSK gel ODS-80TM column using a reversed-phase gradient elution system. For the gradient elution, two mobile phases, A and B, were needed, both commonly consisted of: 5 mM L-proline, 2.5 mM cupric sulfate and 6.5 mM ammonium acetate. Mobile phase B additionally contains 50% (v/v) acetonitrile. The pH of both mobile phases was adjusted to 7.0. Derivatized Pip and Lys were detected on a fluorescent detector at excitation and emission wavelengths of 260 and 313 nm, respectively. The calibration curves were linear within the range 0 to 1 mM (r>0.999). The average recoveries for Pip and Lys were 95.9+/-1.8 and 93.2+/-2.5% in rumen liquor and 98.3+/-1.4 and 97.5+/-1.3% in plasma, respectively. The limits of detection for Pip and Lys were 0.6 and 0.7 microM in rumen liquor and 0.01 and 0.05 microM in plasma. The assay has acceptable precision, relative standard deviation (RSD) for reproducibility (within-day and day-to-day variation) were less than 5.2% for aqueous (5.0 microM Pip and Lys), MB9 (5.0 microM Pip and Lys), plasma (7.1 microM Pip and 85.6 microM Lys) and rumen liquor (28.4 microM Pip and 10.2 microM Lys) samples. The levels of Pip and Lys in faunated goats, determined from three animals over a period of two days sampling, were found to be 36.8+/-18.1 and 14.6+/-2.8 microM in rumen liquor, and 7.3+/-2.5 and 137.3+/-38.0 microM in plasma at 1 h after feeding. This is the first report on the normal levels of Pip in the rumen liquor and plasma of faunated goat.
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Affiliation(s)
- H Hussain-Yusuf
- Laboratory of Animal Nutrition and Biochemistry, Faculty of Agriculture, Miyazaki University, Japan
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35
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Ho B, Zabriskie TM. Epoxide derivatives of pipecolic acid and proline are inhibitors of pipecolate oxidase. Bioorg Med Chem Lett 1998; 8:739-44. [PMID: 9871533 DOI: 10.1016/s0960-894x(98)00106-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cis-4,5-epoxide derivative of L-pipecolic acid (2S,4S,5R-epoxypipecolic acid, cis-3) was synthesized and found to serve as an excellent substrate for L-pipecolate oxidase (L-PO) and also to cause time-dependent, irreversible inactivation of the enzyme. Data are presented showing this compound is a mechanism-based inhibitor of L-PO, whereas 2S,3R,4S-epoxyproline acts as a reversible inhibitor.
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Affiliation(s)
- B Ho
- College of Pharmacy, Oregon State University, Corvallis 97331-3507, USA
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36
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Zabriskie TM, Kelly WL, Liang X. Stereochemical Course of the Oxidation of l-Pipecolic Acid by the Flavoenzyme l-Pipecolate Oxidase. J Am Chem Soc 1997. [DOI: 10.1021/ja970825h] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T. Mark Zabriskie
- College of Pharmacy, Oregon State University Corvallis, Oregon 97331-3507
| | - Wendy L. Kelly
- College of Pharmacy, Oregon State University Corvallis, Oregon 97331-3507
| | - Xi Liang
- College of Pharmacy, Oregon State University Corvallis, Oregon 97331-3507
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37
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Chang YF, Cauley RK, Chang JD, Rao VV. L-alpha-aminoadipate inhibits kynurenate synthesis in rat brain hippocampus and tissue culture. Neurochem Res 1997; 22:825-9. [PMID: 9232635 DOI: 10.1023/a:1022035926832] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Intracerebral administration of L-alpha-aminoadipic acid (L-AAA) at 500 mg/kg body weight to rats caused a complex behavioral change with sporadic wet-dog shakes. Animals developed severe limbic seizures between 1 and 6 h after L-AAA injection, characterized by generalized convulsions. Twenty days after L-AAA injection kynurenine aminotransferase (KAT) activity measured in hippocampal brain tissue slices prepared with a McIlwain chopper at 30 microns showed a significant 43% decrease. Subcutaneous injection of kynurenine at 500 mg/kg showed a 63% increase in KAT activity twenty days later. This increase was offset by a concomitant administration of 500 mg/kg L-AAA stereotaxically on day one. In astrocyte culture kynurenic acid synthesis is inhibited by L-AAA and L-pipecolic acid. The possible involvement of kynurenic acid in the modulation of neuronal degeneration is discussed.
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Affiliation(s)
- Y F Chang
- Department of Oral and Craniofacial Biological Sciences, University of Maryland Dental School, Baltimore 21201, USA
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38
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Zabriskie T, Xi Liang. Mechanism-based inactivation of l-pipecolate oxidase by a sulfur-containing substrate analog, 5-thia-l-pipecolic acid. Bioorg Med Chem Lett 1997. [DOI: 10.1016/s0960-894x(97)00042-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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39
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Zabriskie TM. Mechanism-based inhibition of L-pipecolate oxidase by 4,5-dehydro-L-pipecolic acid. J Med Chem 1996; 39:3046-8. [PMID: 8759625 DOI: 10.1021/jm960331f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- T M Zabriskie
- College of Pharmacy, Oregon State University, Corvallis 97331, USA
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40
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Abstract
The efficacy and the specificity of the putative astrotoxin, alpha-aminoadipate, were examined in this study. The integrity of astrocytes was evaluated at several time points following a single injection of alpha-aminoadipate into amygdala of adult rats using immunohistochemistry. The density and the morphological appearance of neurons and the response of microglia were also examined. The injection of alpha-aminoadipate disrupted the astrocytic network in that region. There was a profound loss of glial fibrillary acidic protein-positive and S100 beta-positive astrocytes, normally present in the region, while vimentin immunohistochemistry revealed the presence of deformed cell processes, presumably astrocytic. The presence of reactive microglia at the injection site was suggestive of an active degenerative process, while the normal neuronal density and appearance, as compared to controls, suggested that the damage was confined to astrocytes. The confirmed effectiveness and cellular specificity of alpha-aminoadipate in vivo makes it a potentially important experimental tool for attempting to decipher the functional significance of astrocytes.
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Affiliation(s)
- M Khurgel
- Department of Anatomy and Cell Biology, University of Toronto, ON, Canada
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41
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Chang YF, Charles AK. Uptake and metabolism of delta 1-piperidine-2-carboxylic acid by synaptosomes from rat cerebral cortex. BIOCHIMICA ET BIOPHYSICA ACTA 1995; 1238:29-33. [PMID: 7654748 DOI: 10.1016/0005-2736(95)00092-h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
delta 1-Piperidine-2-carboxylic acid (P2C), an intermediate of the L-lysine metabolic pathway in the brain, was studied for its uptake and metabolism in the synaptosome of the rat cerebral cortex. The results of this study showed that the uptake of P2C into the synaptosome was NA+- and temperature-dependent with a two-tier transport kinetic (Km = 2.6 and 0.7 microM; Vmax = 1.6 and 0.73 pmol/min/mg). P2C uptake was only moderately inhibited (approximately 20%) by L-lysine and its metabolites, L-pipecolic acid and L-alpha-aminoadipic acid at up to 100 microM, and the putative amino acid neurotransmitters, gamma-aminobutyric acid, L-glutamic acid and L-aspartic acid (25-31%) at 5-500 microM. The synaptosomal preparation only has a very low activity for metabolizing P2C to its product L-pipecolic acid. The metabolic activity for P2C was mainly contained in the 27,000 x g supernatant S2 fraction. Since P2C is the precursor of the putative neuromodulator L-pipecolic acid, the understanding of its uptake and metabolic characteristics in the brain should be of significance.
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Affiliation(s)
- Y F Chang
- Department of Biochemistry, University of Maryland Dental School, Baltimore 21201, USA
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42
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Abstract
This article summarizes our current knowledge of the metabolic pathways present in mammalian peroxisomes. Emphasis is placed on those aspects that are not covered by other articles in this issue: peroxisomal enzyme content and topology; the peroxisomal beta-oxidation system; substrates of peroxisomal beta-oxidation such as very-long-chain fatty acids, branched fatty acids, dicarboxylic fatty acids, prostaglandins and xenobiotics; the role of peroxisomes in the metabolism of purines, polyamines, amino acids, glyoxylate and reactive oxygen products such as hydrogen peroxide, superoxide anions and epoxides.
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Affiliation(s)
- G P Mannaerts
- Afdeling Farmacologie, Faculteit Geneeskunde, Katholieke Universiteit Leuven, Belgium
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43
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Mihalik SJ, McGuinness M, Watkins PA. Purification and characterization of peroxisomal L-pipecolic acid oxidase from monkey liver. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(19)67723-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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44
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Rao VV, Chang YF. L-pipecolic acid metabolism in human liver: detection of L-pipecolate oxidase and identification of its reaction product. BIOCHIMICA ET BIOPHYSICA ACTA 1990; 1038:295-9. [PMID: 2340290 DOI: 10.1016/0167-4838(90)90240-g] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
L-Pipecolate oxidase, an enzyme that oxidizes L-pipecolic acid in the human liver has been demonstrated in the peroxisomal preparation. This enzyme oxidizes L-pipecolic acid with concomitant production of H2O2 in the peroxisome of the normal human liver. The immediate product of L-pipecolic acid oxidation has been identified as L-alpha-aminoadipate delta-semialdehyde. This reaction product was directly, and also after conversion to pipecolic acid by NaBH4 reduction, characterized by use of an amino acid analyzer and thin-layer chromatography. The pit fall of an indirect assay of L-pipecolate oxidase by means of the assay of alpha-aminoadipic acid formation was discussed.
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Affiliation(s)
- V V Rao
- Department of Biochemistry, University of Maryland Dental School, Baltimore 21201
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45
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Chang YF, Ghosh P, Rao VV. L-pipecolic acid metabolism in human liver: L-alpha-aminoadipate delta-semialdehyde oxidoreductase. BIOCHIMICA ET BIOPHYSICA ACTA 1990; 1038:300-5. [PMID: 2160277 DOI: 10.1016/0167-4838(90)90241-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A soluble enzyme that catalyzes the oxidation of L-alpha-aminoadipate delta-semialdehyde to L-alpha-aminoadipic acid in the presence of NAD+ has been isolated and characterized from human liver. This enzyme L-alpha-aminoadipic delta-semialdehyde oxidoreductase has been found to be localized in the cytosol using subcellular fractionation and marker enzyme assays. The reaction product of this enzyme has been identified as L-alpha-aminoadipic acid by use of an amino acid analyzer and thin layer chromatography. The enzymatic reaction was irreversible and has a pH optimum of 8. The enzyme was stimulated by Mg2+, Cu2+ and Mn2+, and has a requirement of free -SH groups. The Km and Vmax values for its substrate L-alpha-aminoadipate delta-semialdehyde were shown to be 181 microM and 71.4 pmol.min-1.mg-1, respectively, and for its coenzyme NAD+ to be 454 microM and 142.9 pmol.min-1.mg-1, respectively. The characteristics of the oxidoreductase obtained from the human liver and Pseudomonas putida were compared.
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Affiliation(s)
- Y F Chang
- Department of Biochemistry, University of Maryland, Dental School, Baltimore 21201
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46
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Davis AT. Assay for lysine-ketoglutarate reductase by reversed-phase high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY 1989; 497:263-7. [PMID: 2516521 DOI: 10.1016/0378-4347(89)80027-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- A T Davis
- Department of Surgery, Michigan State University, Butterworth Hospital, Grand Rapids 49503
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47
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48
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Robertson EF, Poulos A, Sharp P, Manson J, Wise G, Jaunzems A, Carter R. Treatment of infantile phytanic acid storage disease: clinical, biochemical and ultrastructural findings in two children treated for 2 years. Eur J Pediatr 1988; 147:133-42. [PMID: 2452736 DOI: 10.1007/bf00442210] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Two patients with infantile phytanic acid storage disease (infantile Refsum disease), one of whom showed the presence of morphologically normal peroxisomes in a liver biopsy, were treated with a low phytanic acid diet for more than 2 years and the effects of treatment on certain clinical, biochemical and ultrastructural parameters were examined. Both patients showed evidence of either an improvement or stabilisation in their clinical condition. Plasma phytanic acid levels decreased to near normal values in approximately 6 weeks after the introduction of the diet; plasma pipecolic acid also declined markedly but the decrease was not so rapid and its level remained abnormal. C26:C22 fatty acid ratios decreased very slowly and even after 2 years the values remained grossly abnormal. Despite the marked reduction of phytanic acid in the liver, there was an increase in the C26:C22 fatty acid ratios and this appeared to be paralleled by an increase in inclusion bodies. Our data suggest that some patients with the infantile form of Refsum disease may show some clinical benefit from dietary management and this is reflected biochemically by decreases in the plasma levels of phytanic acid and pipecolic acid.
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Affiliation(s)
- E F Robertson
- Department of Chemical Pathology, Adelaide Children's Hospital, Australia
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49
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Chang YF, Hargest V, Chen JS. Modulation of benzodiazepine by lysine and pipecolic acid on pentylenetetrazol-induced seizures. Life Sci 1988; 43:1177-88. [PMID: 2845210 DOI: 10.1016/0024-3205(88)90207-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
L-lysine, an essential amino acid for man and animals, and its metabolite pipecolic acid (PA) have been studied for their effects on pentylenetetrazol (PTZ)-induced seizures in mice. L-Lysine or L-PA i.p. significantly increased clonic and tonic latencies in a dose-dependent manner against 90 mg/kg PTZ-induced seizures. L-Lysine but not L-PA enhanced the anticonvulsant effect of diazepam (DZ) (0.2 mg/kg). L-PA (0.1 mmol/kg) i.c.v. showed a slight decrease in clonic latency; it did not enhance the antiseizure activity of DZ; it caused seizures at 0.6 mmol/kg. D-PA (0.1 mmol/kg) i.c.v. displayed an opposite effect compared to its L-isomer. The anticonvulsant effect of L-lysine in terms of increase in seizure latency and survival was even more amplified when tested with a submaximal PTZ concentration (65 mg/kg). L-Lysine showed an enhancement of specific 3H-flunitrazepam (FZ) binding to mouse brain membranes both in vitro and in vivo. The possibility of L-lysine acting as a modulator for the GABA/benzodiazepine receptors was demonstrated. Since L-PA showed enhancement of 3H-FZ binding only in vitro but not in vivo, the anticonvulsant effect of L-PA may not be linked to the GABA/benzodiazepine receptor.
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Affiliation(s)
- Y F Chang
- Department of Biochemistry, University of Maryland Dental School, Baltimore 21201
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50
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Markovitz PJ, Chuang DT. The bifunctional aminoadipic semialdehyde synthase in lysine degradation. Separation of reductase and dehydrogenase domains by limited proteolysis and column chromatography. J Biol Chem 1987. [DOI: 10.1016/s0021-9258(18)48087-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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