1
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Monda E, Bakalakos A, Syrris P, Mohiddin S, Ferdinandusse S, Murphy E, Elliott PM. Cardiovascular involvement in later-onset malonyl-CoA decarboxylase deficiency: Case studies and literature review. Eur J Med Genet 2023; 66:104885. [PMID: 37979716 DOI: 10.1016/j.ejmg.2023.104885] [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: 05/29/2023] [Accepted: 11/12/2023] [Indexed: 11/20/2023]
Abstract
BACKGROUND Malonyl-CoA decarboxylase deficiency (MLYCDD) is an ultra-rare inherited metabolic disorder, characterized by multi-organ involvement manifesting during the first few months of life. Our aim was to describe the clinical, biochemical, and genetic characteristics of patients with later-onset MLYCDD. METHODS Clinical and biochemical characteristics of two patients aged 48 and 29 years with a confirmed molecular diagnosis of MLYCDD were examined. A systematic review of published studies describing the characteristics of cardiovascular involvement of patients with MLYCDD was performed. RESULTS Two patients diagnosed with MLYCDD during adulthood were identified. The first presented with hypertrophic cardiomyopathy and ventricular pre-excitation and the second with dilated cardiomyopathy (DCM) and mild-to-moderate left ventricular (LV) systolic dysfunction. No other clinical manifestation typical of MLYCDD was observed. Both patients showed slight increase in malonylcarnitine in their plasma acylcarnitine profile, and a reduction in malonyl-CoA decarboxylase activity. During follow-up, no deterioration of LV systolic function was observed. The systematic review identified 33 individuals with a genetic diagnosis of MLYCDD (median age 6 months [IQR 1-12], 22 males [67%]). Cardiovascular involvement was observed in 64% of cases, with DCM the most common phenotype. A modified diet combined with levocarnitine supplementation resulted in the improvement of LV systolic function in most cases. After a median follow-up of 8 months, 3 patients died (two heart failure-related and one arrhythmic death). CONCLUSIONS For the first time this study describes a later-onset phenotype of MLYCDD patients, characterized by single-organ involvement, mildly reduced enzyme activity, and a benign clinical course.
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Affiliation(s)
- Emanuele Monda
- Inherited and Rare Cardiovascular Diseases, Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy; Institute of Cardiovascular Science, University College of London, London, UK.
| | | | - Petros Syrris
- Institute of Cardiovascular Science, University College of London, London, UK
| | - Saidi Mohiddin
- Barts Health NHS Trust, London, UK; Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Sacha Ferdinandusse
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Elaine Murphy
- Charles Dent Metabolic Unit, The National Hospital for Neurology and Neurosurgery, London, UK
| | - Perry Mark Elliott
- Institute of Cardiovascular Science, University College of London, London, UK; Barts Health NHS Trust, London, UK
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2
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Maier EM, Mütze U, Janzen N, Steuerwald U, Nennstiel U, Odenwald B, Schuhmann E, Lotz-Havla AS, Weiss KJ, Hammersen J, Weigel C, Thimm E, Grünert SC, Hennermann JB, Freisinger P, Krämer J, Das AM, Illsinger S, Gramer G, Fang-Hoffmann J, Garbade SF, Okun JG, Hoffmann GF, Kölker S, Röschinger W. Collaborative evaluation study on 18 candidate diseases for newborn screening in 1.77 million samples. J Inherit Metab Dis 2023; 46:1043-1062. [PMID: 37603033 DOI: 10.1002/jimd.12671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 08/22/2023]
Abstract
Analytical and therapeutic innovations led to a continuous but variable extension of newborn screening (NBS) programmes worldwide. Every extension requires a careful evaluation of feasibility, diagnostic (process) quality and possible health benefits to balance benefits and limitations. The aim of this study was to evaluate the suitability of 18 candidate diseases for inclusion in NBS programmes. Utilising tandem mass spectrometry as well as establishing specific diagnostic pathways with second-tier analyses, three German NBS centres designed and conducted an evaluation study for 18 candidate diseases, all of them inherited metabolic diseases. In total, 1 777 264 NBS samples were analysed. Overall, 441 positive NBS results were reported resulting in 68 confirmed diagnoses, 373 false-positive cases and an estimated cumulative prevalence of approximately 1 in 26 000 newborns. The positive predictive value ranged from 0.07 (carnitine transporter defect) to 0.67 (HMG-CoA lyase deficiency). Three individuals were missed and 14 individuals (21%) developed symptoms before the positive NBS results were reported. The majority of tested candidate diseases were found to be suitable for inclusion in NBS programmes, while multiple acyl-CoA dehydrogenase deficiency, isolated methylmalonic acidurias, propionic acidemia and malonyl-CoA decarboxylase deficiency showed some and carnitine transporter defect significant limitations. Evaluation studies are an important tool to assess the potential benefits and limitations of expanding NBS programmes to new diseases.
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Affiliation(s)
- Esther M Maier
- Department of Inborn Errors of Metabolism, Dr. von Hauner Children's Hospital, Munich, Germany
| | - Ulrike Mütze
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Nils Janzen
- Screening-Labor Hanover, Hanover, Germany
- Department of Clinical Chemistry, Hanover Medical School, Hanover, Germany
- Division of Laboratory Medicine, Centre for Children and Adolescents, Kinder- und Jugendkrankenhaus Auf der Bult, Hanover, Germany
| | | | - Uta Nennstiel
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
| | - Birgit Odenwald
- Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
| | | | - Amelie S Lotz-Havla
- Department of Inborn Errors of Metabolism, Dr. von Hauner Children's Hospital, Munich, Germany
| | - Katharina J Weiss
- Department of Inborn Errors of Metabolism, Dr. von Hauner Children's Hospital, Munich, Germany
| | - Johanna Hammersen
- Department of Pediatrics, Division of Inborn Errors of Metabolism, University Hospital Erlangen, Erlangen, Germany
| | - Corina Weigel
- Department of Pediatrics, Division of Inborn Errors of Metabolism, University Hospital Erlangen, Erlangen, Germany
| | - Eva Thimm
- Department of General Pediatrics, University Children's Hospital, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Sarah C Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Centre-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Julia B Hennermann
- Villa Metabolica, Center for Pediatric and Adolescent Medicine, Mainz University Medical Center, Mainz, Germany
| | - Peter Freisinger
- Children's Hospital Reutlingen, Klinikum am Steinenberg, Reutlingen, Germany
| | - Johannes Krämer
- Department of Pediatric and Adolescent Medicine, Ulm University Medical School, Ulm, Germany
| | - Anibh M Das
- Hanover Medical School, Clinic for Pediatric Kidney-Liver- and Metabolic Diseases, Hanover, Germany
| | - Sabine Illsinger
- Hanover Medical School, Clinic for Pediatric Kidney-Liver- and Metabolic Diseases, Hanover, Germany
| | - Gwendolyn Gramer
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
- University Medical Center Hamburg-Eppendorf, University Children's Hospital, Hamburg, Germany
| | - Junmin Fang-Hoffmann
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Sven F Garbade
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Jürgen G Okun
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Georg F Hoffmann
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Stefan Kölker
- Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Wulf Röschinger
- Laboratory Becker MVZ GbR, Newborn Screening Unit, Munich, Germany
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3
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Zou L, Yang Y, Wang Z, Fu X, He X, Song J, Li T, Ma H, Yu T. Lysine Malonylation and Its Links to Metabolism and Diseases. Aging Dis 2023; 14:84-98. [PMID: 36818560 PMCID: PMC9937698 DOI: 10.14336/ad.2022.0711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/11/2022] [Indexed: 11/18/2022] Open
Abstract
Malonylation is a recently identified post-translational modification with malonyl-coenzyme A as the donor. It conserved both in prokaryotes and eukaryotes. Recent advances in the identification and quantification of lysine malonylation by bioinformatic analysis have improved our understanding of its role in the regulation of protein activity, interaction, and localization and have elucidated its involvement in many biological processes. Malonylation has been linked to diverse physiological processes, including metabolic disorders, inflammation, and immune regulation. This review discusses malonylation in theory, describes the underlying mechanism, and summarizes the recent progress in malonylation research. The latest findings point to novel functions of malonylation and highlight the mechanisms by which malonylation regulates a variety of cellular processes. Our review also marks the association between lysine malonylation, the enzymes involved, and various diseases, and discusses promising diagnostic and therapeutic biomolecular targets for future clinical applications.
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Affiliation(s)
- Lu Zou
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Yanyan Yang
- Department of Immunology, Basic Medicine School, Qingdao University, Qingdao, China.
| | - Zhibin Wang
- Department of Cardiac Ultrasound, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Xiuxiu Fu
- Department of Cardiac Ultrasound, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Xiangqin He
- Department of Cardiac Ultrasound, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Jiayi Song
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Tianxiang Li
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Huibo Ma
- Department of Vascular Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | - Tao Yu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.,Department of Cardiac Ultrasound, The Affiliated Hospital of Qingdao University, Qingdao, China.,Correspondence should be addressed to: Dr. Tao Yu, Center for Regenerative Medicine, Institute for Translational Medicine, the Affiliated Hospital of Qingdao University, Qingdao, China.
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4
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Xu F, Wu Y, Huang J, Zhou Y, Xu F, Duan J, Li H. Case report: A novel 5'-UTR-exon1-intron1 deletion in MLYCD in an IVF child with malonyl coenzyme A decarboxylase deficiency and literature review. Front Med (Lausanne) 2023; 10:1160879. [PMID: 37206471 PMCID: PMC10189016 DOI: 10.3389/fmed.2023.1160879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 04/07/2023] [Indexed: 05/21/2023] Open
Abstract
The subject of the study is an 11-month old IVF baby girl with the typical clinical manifestation of malonyl coenzyme A decarboxylase deficiency, including developmental delay, limb weakness, cardiomyopathy, and excessive excretion of malonic acid and methylmalonic acid. Whole genome sequencing (WGS) revealed a novel heterozygous nonsense mutation (c.672delG, p.Trp224Ter) in the MLYCD gene of the proband and her father and a novel heterozygous deletion in 5'-UTR-exon1-intron1 of the MLYCD gene of the proband and her mother. The patient's cardiac function and limb weakness improved considerably after 3 months of a low-fat diet supplemented with L-carnitine. Furthermore, mapping of gene mutations and clinical manifestations was done by case collection.
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Affiliation(s)
- Fang Xu
- Cardiology Treatment Center, Jiangxi Provincial Children's Hospital, Nanchang, China
- JXHC Key Laboratory of Children's Cardiovascular Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Yangyang Wu
- Cardiology Treatment Center, Jiangxi Provincial Children's Hospital, Nanchang, China
- Pediatric Medical Department, Nanchang University, Nanchang, China
| | - Jiyi Huang
- JXHC Key Laboratory of Children's Cardiovascular Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Yunguo Zhou
- Cardiology Treatment Center, Jiangxi Provincial Children's Hospital, Nanchang, China
- JXHC Key Laboratory of Children's Cardiovascular Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Fei Xu
- Cardiology Treatment Center, Jiangxi Provincial Children's Hospital, Nanchang, China
- JXHC Key Laboratory of Children's Cardiovascular Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Junkai Duan
- Cardiology Treatment Center, Jiangxi Provincial Children's Hospital, Nanchang, China
- JXHC Key Laboratory of Children's Cardiovascular Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
- *Correspondence: Junkai Duan
| | - Hong Li
- JXHC Key Laboratory of Children's Cardiovascular Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
- Hong Li
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5
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Zhao C, Peng H, Jiang N, Liu Y, Chen Y, Liu J, Guo Q, Wu Z, Wang L. A case of malonyl coenzyme A decarboxylase deficiency with novel mutations and literature review. Front Pediatr 2023; 11:1133134. [PMID: 37144154 PMCID: PMC10152364 DOI: 10.3389/fped.2023.1133134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 03/24/2023] [Indexed: 05/06/2023] Open
Abstract
Introduction Malonyl coenzyme A decarboxylase deficiency is caused by an abnormality in the MLYCD gene. The clinical manifestations of the disease involve multisystem and multiorgan. Methods We collected and analyzed a patient's clinical characteristics, genetic chain of evidence and RNA-seq. We use the search term "Malonyl-CoA Decarboxylase Deficiency" on Pubmed to collect cases reported. Results We report a 3-year-old girl who is presented with developmental retardation, myocardial damage and elevated C3DC. High-throughput sequencing identified heterozygous mutation (c.798G>A, p.Q266?) in the patient inherited from her father. The other heterozygous mutation (c.641+5G>C) was found in the patient inherited from her mother. RNA-seq showed that there were 254 differential genes in this child, among which 153 genes were up-regulated and 101 genes were down-regulated. Exon jumping events occurred in exons encoding PRMT2 on the positive chain of chromosome 21, which led to abnormal splicing of PRMT2. (P<0.05, FDR<0.05). The result of SNP showed that there were multiple mutation sites on chromosome 1, which may affect the downstream gene variation at the DNA level. The literature review identified 54 cases described since 1984. Discussion It is the first report about the locus, adding a new item to the MLYCD mutation library. Developmental retardation and cardiomyopathy are the most common clinical manifestations, with commonly elevated malonate and malonyl carnitine levels in children.
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Affiliation(s)
- Cong Zhao
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hua Peng
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Nanchuan Jiang
- Department of Radiology,Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yalan Liu
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Chen
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jie Liu
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qing Guo
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zubo Wu
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin Wang
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Heterogenous Clinical Landscape in a Consanguineous Malonic Aciduria Family. Int J Mol Sci 2021; 22:ijms222312633. [PMID: 34884438 PMCID: PMC8658006 DOI: 10.3390/ijms222312633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/12/2021] [Accepted: 11/17/2021] [Indexed: 11/27/2022] Open
Abstract
Malonic aciduria is an extremely rare inborn error of metabolism due to malonyl-CoA decarboxylase deficiency. This enzyme is encoded by the MLYCD (Malonyl-CoA Decarboxylase) gene, and the disease has an autosomal recessive inheritance. Malonic aciduria is characterized by systemic clinical involvement, including neurologic and digestive symptoms, metabolic acidosis, hypoglycemia, failure to thrive, seizures, developmental delay, and cardiomyopathy. We describe here two index cases belonging to the same family that, despite an identical genotype, present very different clinical pictures. The first case is a boy with neonatal metabolic symptoms, abnormal brain MRI, and dilated cardiomyopathy. The second case, the cousin of the first patient in a consanguineous family, showed later symptoms, mainly with developmental delay. Both patients showed high levels of malonylcarnitine on acylcarnitine profiles and malonic acid on urinary organic acid chromatographies. The same homozygous pathogenic variant was identified, c.346C > T; p. (Gln116*). We also provide a comprehensive literature review of reported cases. A review of the literature yielded 52 cases described since 1984. The most common signs were developmental delay and cardiomyopathy. Increased levels of malonic acid and malonylcarnitine were constant. Presentations ranged from neonatal death to patients surviving past adolescence. These two cases and reported patients in the literature highlight the inter- and intrafamilial variability of malonic aciduria.
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7
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Park KC, Krywawych S, Richard E, Desviat LR, Swietach P. Cardiac Complications of Propionic and Other Inherited Organic Acidemias. Front Cardiovasc Med 2020; 7:617451. [PMID: 33415129 PMCID: PMC7782273 DOI: 10.3389/fcvm.2020.617451] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 11/24/2020] [Indexed: 12/12/2022] Open
Abstract
Clinical observations and experimental studies have determined that systemic acid-base disturbances can profoundly affect the heart. A wealth of information is available on the effects of altered pH on cardiac function but, by comparison, much less is known about the actions of the organic anions that accumulate alongside H+ ions in acidosis. In the blood and other body fluids, these organic chemical species can collectively reach concentrations of several millimolar in severe metabolic acidoses, as in the case of inherited organic acidemias, and exert powerful biological actions on the heart that are not intuitive to predict. Indeed, cardiac pathologies, such as cardiomyopathy and arrhythmia, are frequently reported in organic acidemia patients, but the underlying pathophysiological mechanisms are not well established. Research efforts in the area of organic anion physiology have increased dramatically in recent years, particularly for propionate, which accumulates in propionic acidemia, one of the commonest organic acidemias characterized by a high incidence of cardiac disease. This Review provides a comprehensive historical overview of all known organic acidemias that feature cardiac complications and a state-of-the-art overview of the cardiac sequelae observed in propionic acidemia. The article identifies the most promising candidates for molecular mechanisms that become aberrantly engaged by propionate anions (and its metabolites), and discusses how these may result in cardiac derangements in propionic acidemia. Key clinical and experimental findings are considered in the context of potential therapies in the near future.
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Affiliation(s)
- Kyung Chan Park
- Department of Anatomy, Physiology and Genetics, Burdon Sanderson Cardiac Science Centre, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - Steve Krywawych
- Department of Chemical Pathology, Great Ormond Street Hospital, London, United Kingdom
| | - Eva Richard
- Centro de Biología Molecular Severo Ochoa, Universidad Autonoma de Madrid-Consejo Superior de Investigaciones Cientificas (UAM-CSIC), Centro de Investigacion Biomedica en Red de Enfermedades Raras (CIBERER), IdiPaz, Universidad Autónoma de Madrid, Madrid, Spain
| | - Lourdes R Desviat
- Centro de Biología Molecular Severo Ochoa, Universidad Autonoma de Madrid-Consejo Superior de Investigaciones Cientificas (UAM-CSIC), Centro de Investigacion Biomedica en Red de Enfermedades Raras (CIBERER), IdiPaz, Universidad Autónoma de Madrid, Madrid, Spain
| | - Pawel Swietach
- Department of Anatomy, Physiology and Genetics, Burdon Sanderson Cardiac Science Centre, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
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8
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Yang Y, Wu Z, Li S, Yang M, Xiao X, Lian C, Wen W, He H, Zeng J, Wang J, Zhang G. Targeted Blood Metabolomic Study on Retinopathy of Prematurity. Invest Ophthalmol Vis Sci 2020; 61:12. [PMID: 32049343 PMCID: PMC7326483 DOI: 10.1167/iovs.61.2.12] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 10/20/2019] [Indexed: 12/19/2022] Open
Abstract
Purpose This study aims at exploring alterations of major metabolites and metabolic pathways in retinopathy of prematurity (ROP) infants and identifying biomarkers that may merit early diagnosis of ROP. Methods We analyzed targeted metabolites from 81 premature infants (<34 weeks of gestational age), including 40 ROP cases (15 males and 25 females, birth weight 1.263 ± 0. 345 kg, gestational age 31.20 ± 4.62 weeks) and 41 cases (30 males, 11 females, birth weight 1.220 ± 0.293 kg, gestational age 30.96 ± 4.17 weeks) of well-matched non-ROP controls. Metabolites were measured by ultra-performance liquid chromatography-tandem mass spectrometry. Standard multivariate and univariate analysis was performed to interpret metabolomic results. Results Glycine, glutamate, leucine, serine, piperidine, valine, tryptophan, citrulline, malonyl carnitine (C3DC), and homocysteine were identified as the top discriminant metabolites. In particular, discriminant concentrations of C3DC and glycine were also confirmed by univariate analysis as statistically significant different between ROP and non-ROP infants. Conclusions This study gained an insight into the metabolomic aspects of ROP development. We suggest that higher blood levels of C3DC and glycine can be promising biomarkers to predict the occurrence, but not the severity of ROP.
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9
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Chapel-Crespo C, Gavrilov D, Sowa M, Myers J, Day-Salvatore DL, Lynn H, Regier D, Starin D, Steenari M, Schoonderwoerd K, Abdenur JE. Clinical, biochemical and molecular characteristics of malonyl-CoA decarboxylase deficiency and long-term follow-up of nine patients. Mol Genet Metab 2019; 128:113-121. [PMID: 31395333 DOI: 10.1016/j.ymgme.2019.07.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/22/2019] [Accepted: 07/25/2019] [Indexed: 11/18/2022]
Affiliation(s)
| | | | | | | | | | - Haley Lynn
- Children's Hospital of Wisconsin, Milwaukee, WI, USA
| | - Debra Regier
- Children's National Medical Center, Washington DC, USA
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10
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van Weeghel M, Abdurrachim D, Nederlof R, Argmann CA, Houtkooper RH, Hagen J, Nabben M, Denis S, Ciapaite J, Kolwicz SC, Lopaschuk GD, Auwerx J, Nicolay K, Des Rosiers C, Wanders RJ, Zuurbier CJ, Prompers JJ, Houten SM. Increased cardiac fatty acid oxidation in a mouse model with decreased malonyl-CoA sensitivity of CPT1B. Cardiovasc Res 2019; 114:1324-1334. [PMID: 29635338 DOI: 10.1093/cvr/cvy089] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 04/05/2018] [Indexed: 12/17/2022] Open
Abstract
Aims Mitochondrial fatty acid oxidation (FAO) is an important energy provider for cardiac work and changes in cardiac substrate preference are associated with different heart diseases. Carnitine palmitoyltransferase 1B (CPT1B) is thought to perform the rate limiting enzyme step in FAO and is inhibited by malonyl-CoA. The role of CPT1B in cardiac metabolism has been addressed by inhibiting or decreasing CPT1B protein or after modulation of tissue malonyl-CoA metabolism. We assessed the role of CPT1B malonyl-CoA sensitivity in cardiac metabolism. Methods and results We generated and characterized a knock in mouse model expressing the CPT1BE3A mutant enzyme, which has reduced sensitivity to malonyl-CoA. In isolated perfused hearts, FAO was 1.9-fold higher in Cpt1bE3A/E3A hearts compared with Cpt1bWT/WT hearts. Metabolomic, proteomic and transcriptomic analysis showed increased levels of malonylcarnitine, decreased concentration of CPT1B protein and a small but coordinated downregulation of the mRNA expression of genes involved in FAO in Cpt1bE3A/E3A hearts, all of which aim to limit FAO. In vivo assessment of cardiac function revealed only minor changes, cardiac hypertrophy was absent and histological analysis did not reveal fibrosis. Conclusions Malonyl-CoA-dependent inhibition of CPT1B plays a crucial role in regulating FAO rate in the heart. Chronic elevation of FAO has a relatively subtle impact on cardiac function at least under baseline conditions.
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Affiliation(s)
- Michel van Weeghel
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands.,Amsterdam Institute for Gastroenterology and Metabolism (AG&M), Amsterdam, The Netherlands
| | - Desiree Abdurrachim
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, The Netherlands
| | - Rianne Nederlof
- Laboratory of Experimental Intensive Care and Anesthesiology, Department of Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Carmen A Argmann
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, Box 1498, New York, NY, USA
| | - Riekelt H Houtkooper
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands.,Amsterdam Institute for Gastroenterology and Metabolism (AG&M), Amsterdam, The Netherlands
| | - Jacob Hagen
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, Box 1498, New York, NY, USA
| | - Miranda Nabben
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, The Netherlands
| | - Simone Denis
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands.,Amsterdam Institute for Gastroenterology and Metabolism (AG&M), Amsterdam, The Netherlands
| | - Jolita Ciapaite
- Center for Liver, Digestive and Metabolic Diseases, Department of Pediatrics and Systems Biology, Center for Energy Metabolism and Ageing, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Stephen C Kolwicz
- Mitochondria and Metabolism Center, University of Washington School of Medicine, Seattle, WA, USA
| | - Gary D Lopaschuk
- Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Johan Auwerx
- Laboratory of Integrative and Systems Physiology, Ecole Polytechnique Fédérale de Lausanne, Switzerland
| | - Klaas Nicolay
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, The Netherlands
| | - Christine Des Rosiers
- Montreal Heart Institute Research Center and Department of Nutrition, Université de Montréal, Montréal, QC, Canada
| | - Ronald J Wanders
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands.,Amsterdam Institute for Gastroenterology and Metabolism (AG&M), Amsterdam, The Netherlands.,Department of Pediatrics, Academic Medical Center, Emma Children's Hospital, Amsterdam, The Netherlands
| | - Coert J Zuurbier
- Laboratory of Experimental Intensive Care and Anesthesiology, Department of Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Jeanine J Prompers
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, The Netherlands.,Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Sander M Houten
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, Box 1498, New York, NY, USA
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11
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Lipshultz SE, Law YM, Asante-Korang A, Austin ED, Dipchand AI, Everitt MD, Hsu DT, Lin KY, Price JF, Wilkinson JD, Colan SD. Cardiomyopathy in Children: Classification and Diagnosis: A Scientific Statement From the American Heart Association. Circulation 2019; 140:e9-e68. [PMID: 31132865 DOI: 10.1161/cir.0000000000000682] [Citation(s) in RCA: 145] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this scientific statement from the American Heart Association, experts in the field of cardiomyopathy (heart muscle disease) in children address 2 issues: the most current understanding of the causes of cardiomyopathy in children and the optimal approaches to diagnosis cardiomyopathy in children. Cardiomyopathies result in some of the worst pediatric cardiology outcomes; nearly 40% of children who present with symptomatic cardiomyopathy undergo a heart transplantation or die within the first 2 years after diagnosis. The percentage of children with cardiomyopathy who underwent a heart transplantation has not declined over the past 10 years, and cardiomyopathy remains the leading cause of transplantation for children >1 year of age. Studies from the National Heart, Lung, and Blood Institute-funded Pediatric Cardiomyopathy Registry have shown that causes are established in very few children with cardiomyopathy, yet genetic causes are likely to be present in most. The incidence of pediatric cardiomyopathy is ≈1 per 100 000 children. This is comparable to the incidence of such childhood cancers as lymphoma, Wilms tumor, and neuroblastoma. However, the published research and scientific conferences focused on pediatric cardiomyopathy are sparcer than for those cancers. The aim of the statement is to focus on the diagnosis and classification of cardiomyopathy. We anticipate that this report will help shape the future research priorities in this set of diseases to achieve earlier diagnosis, improved clinical outcomes, and better quality of life for these children and their families.
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12
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Santos-Cortez RLP, Khan V, Khan FS, Mughal ZUN, Chakchouk I, Lee K, Rasheed M, Hamza R, Acharya A, Ullah E, Saqib MAN, Abbe I, Ali G, Hassan MJ, Khan S, Azeem Z, Ullah I, Bamshad MJ, Nickerson DA, Schrauwen I, Ahmad W, Ansar M, Leal SM. Novel candidate genes and variants underlying autosomal recessive neurodevelopmental disorders with intellectual disability. Hum Genet 2018; 137:735-752. [PMID: 30167849 PMCID: PMC6201268 DOI: 10.1007/s00439-018-1928-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/10/2018] [Indexed: 01/30/2023]
Abstract
Identification of Mendelian genes for neurodevelopmental disorders using exome sequencing to study autosomal recessive (AR) consanguineous pedigrees has been highly successful. To identify causal variants for syndromic and non-syndromic intellectual disability (ID), exome sequencing was performed using DNA samples from 22 consanguineous Pakistani families with ARID, of which 21 have additional phenotypes including microcephaly. To aid in variant identification, homozygosity mapping and linkage analysis were performed. DNA samples from affected family member(s) from every pedigree underwent exome sequencing. Identified rare damaging exome variants were tested for co-segregation with ID using Sanger sequencing. For seven ARID families, variants were identified in genes not previously associated with ID, including: EI24, FXR1 and TET3 for which knockout mouse models have brain defects; and CACNG7 and TRAPPC10 where cell studies suggest roles in important neural pathways. For two families, the novel ARID genes CARNMT1 and GARNL3 lie within previously reported ID microdeletion regions. We also observed homozygous variants in two ID candidate genes, GRAMD1B and TBRG1, for which each has been previously reported in a single family. An additional 14 families have homozygous variants in established ID genes, of which 11 variants are novel. All ARID genes have increased expression in specific structures of the developing and adult human brain and 91% of the genes are differentially expressed in utero or during early childhood. The identification of novel ARID candidate genes and variants adds to the knowledge base that is required to further understand human brain function and development.
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Affiliation(s)
- Regie Lyn P Santos-Cortez
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA
- Department of Otolaryngology, University of Colorado School of Medicine, 12700 E. 19th Ave., Aurora, CO, 80045, USA
| | - Valeed Khan
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Falak Sher Khan
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Zaib-Un-Nisa Mughal
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Imen Chakchouk
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA
| | - Kwanghyuk Lee
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA
| | - Memoona Rasheed
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Rifat Hamza
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Anushree Acharya
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA
| | - Ehsan Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Muhammad Arif Nadeem Saqib
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
- Pakistan Health Research Council, Shahrah-e-Jamhuriat, G-5/2, Islamabad, Pakistan
| | - Izoduwa Abbe
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA
| | - Ghazanfar Ali
- Department of Biotechnology, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
| | - Muhammad Jawad Hassan
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Saadullah Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology, Kohat, KPK, Pakistan
| | - Zahid Azeem
- Department of Biochemistry, Azad Jammu and Kashmir Medical College, Muzaffarabad, Pakistan
| | - Irfan Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Michael J Bamshad
- Department of Genome Sciences, University of Washington, Foege Building S-250, 3720 15th Ave. NE, Seattle, WA, 98195, USA
- Department of Pediatrics, University of Washington, 1959 NE Pacific St., Seattle, WA, 98195, USA
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Foege Building S-250, 3720 15th Ave. NE, Seattle, WA, 98195, USA
| | - Isabelle Schrauwen
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Muhammad Ansar
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Suzanne M Leal
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, 1 Baylor Plaza 700D, Houston, TX, 77030, USA.
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13
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Messina M, Meli C, Raudino F, Pittalá A, Arena A, Barone R, Giuffrida F, Iacobacci R, Muccilli V, Sorge G, Fiumara A. Expanded Newborn Screening Using Tandem Mass Spectrometry: Seven Years of Experience in Eastern Sicily. Int J Neonatal Screen 2018; 4:12. [PMID: 33072938 PMCID: PMC7510204 DOI: 10.3390/ijns4020012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 04/04/2018] [Indexed: 01/05/2023] Open
Abstract
The expanded newborn screening for selected inborn errors of metabolism (IEM) in Sicily was introduced in 2007 by a Regional project entitled "Early detection of congenital metabolic diseases: expanded neonatal screening". It established two newborn screening laboratories, for Western and Eastern Sicily, which started their activity in 2011. Here we present the results of expanded screening (excluding phenylketonuria (PKU)) of the Eastern laboratory from January 2011 to December 2017. Our data highlight the importance of the expanded newborn screening as a basic health program to avoid the underestimation of rare diseases and the need of further investigations even when there are no textbook alterations of the metabolic profiles. We performed our analysis on dried blood spot by tandem mass spectrometry, according to Italian guidelines. A total of 196 samples from 60,408 newborns gave positive screening results (recall rate 0.32%) while 12 babies were true positive, including 2 newborns whose mothers resulted in being affected by a metabolic disease. The overall frequency of IEM found in the screening panel was 1:6041 (mothers excluded) or 1:5034 (mothers included). The introduction of MS/MS technology in Sicily has significantly increased the detection of inherited metabolic disorders, including those not previously covered, with a predictable improved outcome for several disorders.
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Affiliation(s)
- MariaAnna Messina
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
- Correspondence: ; Tel.: +39-095-3781-493
| | - Concetta Meli
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Federica Raudino
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Annarita Pittalá
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Alessia Arena
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Rita Barone
- Child Neurology and Psichiatry, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Fortunata Giuffrida
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Riccardo Iacobacci
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Vera Muccilli
- Chemistry Department, Uiversity of Catania, Viale Andrea Doria 5, 95123 Catania, Italy
| | - Giovanni Sorge
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
| | - Agata Fiumara
- Referral Center for Inherited Metabolic Diseases, Pediatric Clinical, AOU Policlinico-VE, Via Santa Sofia 78, 95123 Catania, Italy
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14
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Ersoy M, Akyol MB, Ceylaner S, Çakır Biçer N. A novel frameshift mutation of malonyl-CoA decarboxylase deficiency: clinical signs and therapy response of a late-diagnosed case. Clin Case Rep 2017; 5:1284-1288. [PMID: 28781843 PMCID: PMC5538191 DOI: 10.1002/ccr3.1013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 01/18/2017] [Accepted: 03/09/2017] [Indexed: 01/20/2023] Open
Abstract
We evaluate the clinical findings and the treatment response of a late‐diagnosed case with a novel homozygous insertion c.13_14insG (p.P6Afs*202) result in a frameshift mutation in MLYCD gene. Both cardiac and neurologic involvements were mild when compared to previously reported cases, and see low‐fat/high‐carbohydrate diet treatment is highly effective.
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Affiliation(s)
- Melike Ersoy
- Department of Pediatrics Division of Pediatric Metabolism Bakirkoy Dr. Sadi Konuk Research and Training Hospital Istanbul Turkey
| | - Mehmet Bedir Akyol
- Department of Pediatrics Division of Pediatric Cardiology Bakirkoy Dr. Sadi Konuk Research and Training Hospital Istanbul Turkey
| | | | - Nihan Çakır Biçer
- Department of Nutrition and Dietetics Istanbul Arel University Istanbul Turkey
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15
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Ambati CSR, Yuan F, Abu-Elheiga LA, Zhang Y, Shetty V. Identification and Quantitation of Malonic Acid Biomarkers of In-Born Error Metabolism by Targeted Metabolomics. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:929-938. [PMID: 28315235 DOI: 10.1007/s13361-017-1631-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 02/13/2017] [Accepted: 02/17/2017] [Indexed: 06/06/2023]
Abstract
Malonic acid (MA), methylmalonic acid (MMA), and ethylmalonic acid (EMA) metabolites are implicated in various non-cancer disorders that are associated with inborn-error metabolism. In this study, we have slightly modified the published 3-nitrophenylhydrazine (3NPH) derivatization method and applied it to derivatize MA, MMA, and EMA to their hydrazone derivatives, which were amenable for liquid chromatography- mass spectrometry (LC-MS) quantitation. 3NPH was used to derivatize MA, MMA, and EMA, and multiple reaction monitoring (MRM) transitions of the corresponding derivatives were determined by product-ion experiments. Data normalization and absolute quantitation were achieved by using 3NPH derivatized isotopic labeled compounds 13C2-MA, MMA-D3, and EMA-D3. The detection limits were found to be at nanomolar concentrations and a good linearity was achieved from nanomolar to millimolar concentrations. As a proof of concept study, we have investigated the levels of malonic acids in mouse plasma with malonyl-CoA decarboxylase deficiency (MCD-D), and we have successfully applied 3NPH method to identify and quantitate all three malonic acids in wild type (WT) and MCD-D plasma with high accuracy. The results of this method were compared with that of underivatized malonic acid standards experiments that were performed using hydrophilic interaction liquid chromatography (HILIC)-MRM. Compared with HILIC method, 3NPH derivatization strategy was found to be very efficient to identify these molecules as it greatly improved the sensitivity, quantitation accuracy, as well as peak shape and resolution. Furthermore, there was no matrix effect in LC-MS analysis and the derivatized metabolites were found to be very stable for longer time. Graphical Abstract ᅟ.
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Affiliation(s)
- Chandra Shekar R Ambati
- Metabolomics Core Facility, Molecular and Cellular Biology, Alkek Center for Molecular Discovery, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Furong Yuan
- Department of Biochemistry, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Lutfi A Abu-Elheiga
- Department of Biochemistry, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Yiqing Zhang
- Metabolomics Core Facility, Molecular and Cellular Biology, Alkek Center for Molecular Discovery, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Vivekananda Shetty
- Metabolomics Core Facility, Molecular and Cellular Biology, Alkek Center for Molecular Discovery, Baylor College of Medicine, Houston, TX, 77030, USA.
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16
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Bleeker JC, Houtkooper RH. Sirtuin activation as a therapeutic approach against inborn errors of metabolism. J Inherit Metab Dis 2016; 39:565-72. [PMID: 27146436 PMCID: PMC4920849 DOI: 10.1007/s10545-016-9939-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/05/2016] [Accepted: 04/11/2016] [Indexed: 01/02/2023]
Abstract
Protein acylation has emerged as a large family of post translational modifications in which an acyl group can alter the function of a wide variety of proteins, especially in response to metabolic stress. The acylation state is regulated through reversible acylation/deacylation. Acylation occurs enzymatically or non-enzymatically, and responds to acyl-CoA levels. Deacylation on the other hand is controlled through the NAD(+)-dependent sirtuin proteins. In several inborn errors of metabolism (IEMs), accumulation of acyl-CoAs, due to defects in amino acid and fatty acid metabolic pathways, can lead to hyperacylation of proteins. This can have a direct effect on protein function and might play a role in pathophysiology. In this review we describe several mouse and cell models for IEM that display high levels of lysine acylation. Furthermore, we discuss how sirtuins serve as a promising therapeutic target to restore acylation state and could treat IEMs. In this context we examine several pharmacological sirtuin activators, such as resveratrol, NAD(+) precursors and PARP and CD38 inhibitors.
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Affiliation(s)
- Jeannette C Bleeker
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
- Department of Metabolic Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, Lundlaan 6, 3584 EA, Utrecht, The Netherlands
| | - Riekelt H Houtkooper
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
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17
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Liu H, Tan D, Han L, Ye J, Qiu W, Gu X, Zhang H. A new case of malonyl-CoA decarboxylase deficiency with mild clinical features. Am J Med Genet A 2016; 170A:1347-51. [PMID: 26858006 DOI: 10.1002/ajmg.a.37590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 01/22/2016] [Indexed: 01/19/2023]
Abstract
Malonyl-CoA decarboxylase deficiency is an extremely rare autosomal recessive inborn error of fatty acid metabolism. It usually follows a severe disease course and presents poor prognosis without treatment. Here, we report an affected female juvenile with a mild clinical and biochemical phenotype who mainly featured poor schooling without cardiomyopathy and metabolic acidosis. She was suspected of malonyl-CoA decarboxylase deficiency due to a 57-kb deletion in 16q23.3 encompassing the MLCYD gene revealed by chromosome microarray. Malonyl-CoA decarboxylase deficiency was then confirmed by acylcarnitine analysis and organic acid analysis. Real-time PCR analysis of the patient revealed the first three exon deletion of the MLYCD gene, which was maternally inherited. DNA sequencing of the MLYCD gene of the patient identified a novel heterozygous mutation (c.911G>A, p.G304E) in exon 4 that was paternally inherited. The patient urine malonic acid dissolved and had a better school record in 6 month after initiation of fat-limited diet. At 1 year post treatment, the blood malonylcarnitine level decreased remarkably. Our result expands the phenotype of malonyl-CoA decarboxylase deficiency and suggests attentions should be paid to the mild form of disorders, for example, malonyl-CoA decarboxylase deficiency, which usually present a severe disease course.
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Affiliation(s)
- Huan Liu
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dongqiong Tan
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lianshu Han
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun Ye
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenjuan Qiu
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xuefan Gu
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Huiwen Zhang
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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18
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Colak G, Pougovkina O, Dai L, Tan M, Te Brinke H, Huang H, Cheng Z, Park J, Wan X, Liu X, Yue WW, Wanders RJA, Locasale JW, Lombard DB, de Boer VCJ, Zhao Y. Proteomic and Biochemical Studies of Lysine Malonylation Suggest Its Malonic Aciduria-associated Regulatory Role in Mitochondrial Function and Fatty Acid Oxidation. Mol Cell Proteomics 2015; 14:3056-71. [PMID: 26320211 DOI: 10.1074/mcp.m115.048850] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Indexed: 11/06/2022] Open
Abstract
The protein substrates of sirtuin 5-regulated lysine malonylation (Kmal) remain unknown, hindering its functional analysis. In this study, we carried out proteomic screening, which identified 4042 Kmal sites on 1426 proteins in mouse liver and 4943 Kmal sites on 1822 proteins in human fibroblasts. Increased malonyl-CoA levels in malonyl-CoA decarboxylase (MCD)-deficient cells induces Kmal levels in substrate proteins. We identified 461 Kmal sites showing more than a 2-fold increase in response to MCD deficiency as well as 1452 Kmal sites detected only in MCD-/- fibroblast but not MCD+/+ cells, suggesting a pathogenic role of Kmal in MCD deficiency. Cells with increased lysine malonylation displayed impaired mitochondrial function and fatty acid oxidation, suggesting that lysine malonylation plays a role in pathophysiology of malonic aciduria. Our study establishes an association between Kmal and a genetic disease and offers a rich resource for elucidating the contribution of the Kmal pathway and malonyl-CoA to cellular physiology and human diseases.
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Affiliation(s)
- Gozde Colak
- From the Ben May Department of Cancer Research, University of Chicago, Chicago, Illinois 60637
| | - Olga Pougovkina
- Laboratory of Genetic Metabolic Diseases, Department of Clinical Chemistry and
| | - Lunzhi Dai
- From the Ben May Department of Cancer Research, University of Chicago, Chicago, Illinois 60637
| | - Minjia Tan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Heleen Te Brinke
- Laboratory of Genetic Metabolic Diseases, Department of Clinical Chemistry and
| | - He Huang
- From the Ben May Department of Cancer Research, University of Chicago, Chicago, Illinois 60637
| | | | - Jeongsoon Park
- Department of Pathology and Institute of Gerontology, University of Michigan, Ann Arbor, Michigan 48109
| | - Xuelian Wan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xiaojing Liu
- Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853, and
| | - Wyatt W Yue
- Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Ronald J A Wanders
- Laboratory of Genetic Metabolic Diseases, Department of Clinical Chemistry and Department of Pediatrics, Emma's Children Hospital, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Jason W Locasale
- Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853, and
| | - David B Lombard
- Department of Pathology and Institute of Gerontology, University of Michigan, Ann Arbor, Michigan 48109
| | - Vincent C J de Boer
- Laboratory of Genetic Metabolic Diseases, Department of Clinical Chemistry and Department of Pediatrics, Emma's Children Hospital, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands,
| | - Yingming Zhao
- From the Ben May Department of Cancer Research, University of Chicago, Chicago, Illinois 60637, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China,
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19
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Polinati PP, Valanne L, Tyni T. Malonyl-CoA decarboxylase deficiency: long-term follow-up of a patient new clinical features and novel mutations. Brain Dev 2015; 37:107-13. [PMID: 24613099 DOI: 10.1016/j.braindev.2014.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 02/06/2014] [Accepted: 02/07/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND Malonyl-CoA decarboxylase (MLYCD, EC 4.1.1.9) deficiency is a rare autosomal recessive disorder that is widely diagnosed by neonatal screening. METHODS We report long term follow up of a patient with MLYCD deficiency showing signs of neonatal hypoglycemia, mental retardation, developmental delay and rheumatoid arthritis. Brain MRI revealed patchy, symmetrical hyperintensity of the deep white matter with periventricular white matter and subcortical arcuate fibers being spared. MLCYD gene sequence analysis was done to identify possible mutations. Expression analyses at mRNA and protein levels were also performed. Further, immunocytochemical studies were implemented to check for its subcellular localization. RESULTS MLYCD gene sequencing identified a novel compound heterozygous mutation (c.22 T>A, p.M1K, c.454 C>A; pH152N) in our patient and a heterozygous mutation in the healthy mother c.22 T>A; pM1K. Reduced expression of RNA and protein levels was observed. Immunocytochemical analysis showed diffused staining across the cytoplasm with apparent signs of intracellular mislocalization to the nucleus. RESULTS also indicated subcellular colocalization of MLCYD with mitochondria was scant compared to control. CONCLUSION Our patient was identified with a novel compound heterozygous MLYCD mutation at the N-terminal helical domain. This study indicates that protein mislocalization is a characteristic feature of MLYCD deficiency in our patient.
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Affiliation(s)
- Padmini P Polinati
- Research Program of Molecular Neurology, Biomedicum 1, University of Helsinki, Helsinki, Finland.
| | - Leena Valanne
- Children Hospital, Helsinki University Central Hospital, Helsinki, Finland
| | - Tiina Tyni
- Research Program of Molecular Neurology, Biomedicum 1, University of Helsinki, Helsinki, Finland; Children Hospital, Helsinki University Central Hospital, Helsinki, Finland
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20
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Baertling F, Mayatepek E, Thimm E, Schlune A, Kovacevic A, Distelmaier F, Salomons GS, Meissner T. Malonic aciduria: long-term follow-up of new patients detected by newborn screening. Eur J Pediatr 2014; 173:1719-22. [PMID: 25233985 DOI: 10.1007/s00431-014-2421-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 09/09/2014] [Indexed: 11/25/2022]
Abstract
UNLABELLED Malonic aciduria is an extremely rare autosomal recessive inborn error of metabolism. We present clinical, biochemical and genetic information for several years of follow-up of new malonic aciduria patients who were diagnosed by newborn screening. These data are discussed with regard to treatment options and possible diagnostic pitfalls. The cases presented here show that the course of malonic aciduria is unpredictable and can even significantly differ in two siblings harbouring identical mutations. Early treatment can lead to the rapid improvement of cardiomyopathy in the course of malonic aciduria. Biochemical parameters seem to be variable and can intermittently be undetectable in the blood or urine samples of affected patients. Therefore, confirmatory tests following a positive newborn screening should be taken with caution and include both malonyl carnitine detection in dried blood spots and urinary organic acid analysis as initial measures. CONCLUSION Patients with a suspected or confirmed diagnosis of malonic aciduria should undergo thorough diagnostic procedures and be regularly screened for complications such as cardiomyopathy even when they are asymptomatic in order to ensure early therapy of treatable complications.
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Affiliation(s)
- Fabian Baertling
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children's Hospital Duesseldorf, Heinrich-Heine-University, Moorenstr. 5, 40225, Duesseldorf, Germany,
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21
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Rodriguez S, Ellis JM, Wolfgang MJ. Chemical-genetic induction of Malonyl-CoA decarboxylase in skeletal muscle. BMC BIOCHEMISTRY 2014; 15:20. [PMID: 25152047 PMCID: PMC4236586 DOI: 10.1186/1471-2091-15-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 08/13/2014] [Indexed: 01/02/2023]
Abstract
Background Defects in skeletal muscle fatty acid oxidation have been implicated in the etiology of insulin resistance. Malonyl-CoA decarboxylase (MCD) has been a target of investigation because it reduces the concentration of malonyl-CoA, a metabolite that inhibits fatty acid oxidation. The in vivo role of muscle MCD expression in the development of insulin resistance remains unclear. Results To determine the role of MCD in skeletal muscle of diet induced obese and insulin resistant mouse models we generated mice expressing a muscle specific transgene for MCD (Tg-fMCDSkel) stabilized posttranslationally by the small molecule, Shield-1. Tg-fMCDSkel and control mice were placed on either a high fat or low fat diet for 3.5 months. Obese and glucose intolerant as well as lean control Tg-fMCDSkel and nontransgenic control mice were treated with Shield-1 and changes in their body weight and insulin sensitivity were determined upon induction of MCD. Inducing MCD activity >5-fold in skeletal muscle over two weeks did not alter body weight or glucose intolerance of obese mice. MCD induction further potentiated the defects in insulin signaling of obese mice. In addition, key enzymes in fatty acid oxidation were suppressed following MCD induction. Conclusion Acute induction of MCD in the skeletal muscle of obese and glucose intolerant mice did not improve body weight and decreased insulin sensitivity compared to obese nontransgenic controls. Induction of MCD in skeletal muscle resulted in a suppression of mitochondrial oxidative genes suggesting a redundant and metabolite driven regulation of gene expression.
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Affiliation(s)
| | | | - Michael J Wolfgang
- Department of Biological Chemistry, Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, 725 N, Wolfe St,, 475 Rangos Building, Baltimore, Maryland 21205, USA.
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Aksentijević D, McAndrew DJ, Karlstädt A, Zervou S, Sebag-Montefiore L, Cross R, Douglas G, Regitz-Zagrosek V, Lopaschuk GD, Neubauer S, Lygate CA. Cardiac dysfunction and peri-weaning mortality in malonyl-coenzyme A decarboxylase (MCD) knockout mice as a consequence of restricting substrate plasticity. J Mol Cell Cardiol 2014; 75:76-87. [PMID: 25066696 PMCID: PMC4169183 DOI: 10.1016/j.yjmcc.2014.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 07/15/2014] [Accepted: 07/16/2014] [Indexed: 01/21/2023]
Abstract
UNLABELLED Inhibition of malonyl-coenzyme A decarboxylase (MCD) shifts metabolism from fatty acid towards glucose oxidation, which has therapeutic potential for obesity and myocardial ischemic injury. However, ~40% of patients with MCD deficiency are diagnosed with cardiomyopathy during infancy. AIM To clarify the link between MCD deficiency and cardiac dysfunction in early life and to determine the contributing systemic and cardiac metabolic perturbations. METHODS AND RESULTS MCD knockout mice ((-/-)) exhibited non-Mendelian genotype ratios (31% fewer MCD(-/-)) with deaths clustered around weaning. Immediately prior to weaning (18days) MCD(-/-) mice had lower body weights, elevated body fat, hepatic steatosis and glycogen depletion compared to wild-type littermates. MCD(-/-) plasma was hyperketonemic, hyperlipidemic, had 60% lower lactate levels and markers of cellular damage were elevated. MCD(-/-) hearts exhibited hypertrophy, impaired ejection fraction and were energetically compromised (32% lower total adenine nucleotide pool). However differences between WT and MCD(-/-) converged with age, suggesting that, in surviving MCD(-/-) mice, early cardiac dysfunction resolves over time. These observations were corroborated by in silico modelling of cardiomyocyte metabolism, which indicated improvement of the MCD(-/-) metabolic phenotype and improved cardiac efficiency when switched from a high-fat diet (representative of suckling) to a standard post-weaning diet, independent of any developmental changes. CONCLUSIONS MCD(-/-) mice consistently exhibited cardiac dysfunction and severe metabolic perturbations while on a high-fat, low carbohydrate diet of maternal milk and these gradually resolved post-weaning. This suggests that dysfunction is a common feature of MCD deficiency during early development, but that severity is dependent on composition of dietary substrates.
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Affiliation(s)
- Dunja Aksentijević
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Debra J McAndrew
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Anja Karlstädt
- Institute of Gender in Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany; Center for Cardiovascular Research, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Sevasti Zervou
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Liam Sebag-Montefiore
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Rebecca Cross
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Gillian Douglas
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Vera Regitz-Zagrosek
- Institute of Gender in Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany; Center for Cardiovascular Research, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Gary D Lopaschuk
- Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Stefan Neubauer
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK
| | - Craig A Lygate
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK; British Heart Foundation Centre for Research Excellence, University of Oxford, UK.
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Celato A, Mitola C, Tolve M, Giannini MT, De Leo S, Carducci C, Carducci C, Leuzzi V. A new case of malonic aciduria with a presymptomatic diagnosis and an early treatment. Brain Dev 2013. [PMID: 23177061 DOI: 10.1016/j.braindev.2012.10.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Malonyl-CoA decarboxylase deficiency (MLYCD) is a rare autosomal recessive inborn error of metabolism presenting a variable clinical phenotype. We report an affected Italian male receiving an early diagnosis (8days after birth) and a timely dietary therapy (high carbohydrate, low long chain fatty acid and medium chain triglyceride supplemented diet with l-carnitine supplementation). The boy was born at term and presented normal function of the heart (except for a tricuspid Ebstein-like dysplasia) and neurodevelopmental status. Genomic sequencing of MLYCD gene revealed two point mutations (c.672G>A, c.869C>T) not listed in the Human MLYCD Allelic Variant Database nor in Human Gene Mutation Database, responsible for a deleterious effect on protein structure and function according to a computational analysis (MuPro, SIFT, ConSEQ v1.1). At the age of 2years he only showed a mild language and psychomotor delay, while heart functioning became normal. Brain MRI examination was normal. Thirty-five cases, including our patient, have been described to date. This is the first report concerning a malonic aciduria patient diagnosed on newborn screening and treated in a presymptomatic stage of the disease.
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Affiliation(s)
- Andrea Celato
- Department of Child Neurology and Psychiatry, Sapienza University of Rome, Italy
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Froese DS, Forouhar F, Tran TH, Vollmar M, Kim YS, Lew S, Neely H, Seetharaman J, Shen Y, Xiao R, Acton TB, Everett JK, Cannone G, Puranik S, Savitsky P, Krojer T, Pilka ES, Kiyani W, Lee WH, Marsden BD, von Delft F, Allerston CK, Spagnolo L, Gileadi O, Montelione GT, Oppermann U, Yue WW, Tong L. Crystal structures of malonyl-coenzyme A decarboxylase provide insights into its catalytic mechanism and disease-causing mutations. Structure 2013; 21:1182-92. [PMID: 23791943 PMCID: PMC3701320 DOI: 10.1016/j.str.2013.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 05/09/2013] [Accepted: 05/09/2013] [Indexed: 01/17/2023]
Abstract
Malonyl-coenzyme A decarboxylase (MCD) is found from bacteria to humans, has important roles in regulating fatty acid metabolism and food intake, and is an attractive target for drug discovery. We report here four crystal structures of MCD from human, Rhodopseudomonas palustris, Agrobacterium vitis, and Cupriavidus metallidurans at up to 2.3 Å resolution. The MCD monomer contains an N-terminal helical domain involved in oligomerization and a C-terminal catalytic domain. The four structures exhibit substantial differences in the organization of the helical domains and, consequently, the oligomeric states and intersubunit interfaces. Unexpectedly, the MCD catalytic domain is structurally homologous to those of the GCN5-related N-acetyltransferase superfamily, especially the curacin A polyketide synthase catalytic module, with a conserved His-Ser/Thr dyad important for catalysis. Our structures, along with mutagenesis and kinetic studies, provide a molecular basis for understanding pathogenic mutations and catalysis, as well as a template for structure-based drug design. Structures of human and bacterial MCDs were determined at up to 2.3 Å resolution Distinct tetrameric and dimeric MCD oligomerizations were observed Unexpected homology to the GNAT superfamily gives insights into catalytic mechanism The structures provide the molecular basis for the disease-causing mutations in MCD
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Affiliation(s)
- D Sean Froese
- Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, UK
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25
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Reindl BA, Lynch DW, Ramirez M, Valbracht M, Davis-Keppen L, Tams KC, Groeneveld S. Sani-cloth wipe mimics rare enzyme deficiency malonic aciduria on newborn screen. Pediatrics 2012; 130:e1363-8. [PMID: 23071203 DOI: 10.1542/peds.2012-0569] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Within a 7-month period at our institution, newborn screening by tandem mass spectrometry revealed 10 cases with elevated levels of malonylcarnitine, which suggested malonic aciduria. Malonic aciduria is a rare autosomal recessive inborn error of metabolism. Confirmatory testing yielded normal results in all the newborns involved. The application of quality improvement practices dictated investigating the dried blood spot collection process, which revealed the use of multiple blood-collection techniques by newborn nursery staff, improper handling of the dried blood spot specimens, and sanitary wipe contamination as the causes of the aberrant false-positive results at our institution. This systematic evaluation identified the cause of the aberrant false-positive results and a strategy was implemented to avoid aberrant results in the future. Thus far, no false-positive results have occurred since the investigative process. False-positive results on a newborn screen can cause unnecessary emotional and economic stress on families, a finding that was identified at our institution. Historically, false-positive newborn screening results have been identified in infants born by cesarean delivery in which iodine antiseptic was used and in newborns who receive total parenteral nutrition, such as premature infants in the NICU. Therefore, if an unusually high number of false-positive results are found during the newborn screening process, contamination should be considered as a contributing factor.
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Affiliation(s)
- Bailey A Reindl
- Department of Pathology, Sanford School of Medicine of the University of South Dakota, Sioux Falls, South Dakota 57105, USA.
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Prada CE, Jefferies JL, Grenier MA, Huth CM, Page KI, Spicer RL, Towbin JA, Leslie ND. Malonyl coenzyme A decarboxylase deficiency: early dietary restriction and time course of cardiomyopathy. Pediatrics 2012; 130:e456-60. [PMID: 22778304 DOI: 10.1542/peds.2011-2927] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Malonyl coenzyme A (CoA) decarboxylase (MCD) deficiency is a rare autosomal recessive organic acidemia characterized by varying degrees of organ involvement and severity. MCD regulates fatty acid biosynthesis and converts malonyl-CoA to acetyl-CoA. Cardiomyopathy is 1 of the leading causes of morbidity and mortality in this disorder. It is unknown if diet alone prevents cardiomyopathy development based in published literature. We report a 10-month-old infant girl identified by newborn screening and confirmed MCD deficiency with a novel homozygous MLYCD mutation. She had normal echocardiogram measurements before transition to high medium-chain triglycerides and low long-chain triglycerides diet. Left ventricular noncompaction development was not prevented by dietary interventions. Further restriction of long-chain triglycerides and medium-chain triglycerides supplementation in combination with angiotensin-converting enzyme inhibitors helped to improve echocardiogram findings. Patient remained asymptomatic, with normal development and growth. Our case emphasizes the need for ongoing cardiac disease screening in patients with MCD deficiency and the benefits and limitations of current dietary interventions.
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Affiliation(s)
- Carlos E Prada
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, 3333 Burnet Ave, MLC 4006, Cincinnati, OH 45229, USA
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Xue J, Peng J, Zhou M, Zhong L, Yin F, Liang D, Wu L. Novel compound heterozygous mutation of MLYCD in a Chinese patient with malonic aciduria. Mol Genet Metab 2012; 105:79-83. [PMID: 22104738 DOI: 10.1016/j.ymgme.2011.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/08/2011] [Accepted: 09/08/2011] [Indexed: 11/30/2022]
Abstract
A 3-year-old Chinese boy presented with prominent clinical features of malonic aciduria, including developmental delay, short stature, brain abnormalities and massive excretion of malonic acid and methylmalonic acid. Molecular characterization by DNA sequencing analysis and multiplex ligation-dependent probe amplification of the MLYCD gene revealed a heterozygous mutation (c.920T>G, p.Leu307Arg) in the patient and his father and a heterozygous deletion comprising exon 1 in the patient and his mother. The missense mutation (c.920T>G) was not found in 100 healthy controls and has not been reported previously. Our findings expand the number of reported cases and add a novel entry to the repertoire of MLYCD mutations.
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Affiliation(s)
- Jinjie Xue
- State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China
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Footitt EJ, Stafford J, Dixon M, Burch M, Jakobs C, Salomons GS, Cleary MA. Use of a long-chain triglyceride-restricted/medium-chain triglyceride-supplemented diet in a case of malonyl-CoA decarboxylase deficiency with cardiomyopathy. J Inherit Metab Dis 2010; 33 Suppl 3:S253-6. [PMID: 20549361 DOI: 10.1007/s10545-010-9137-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Revised: 05/17/2010] [Accepted: 05/19/2010] [Indexed: 10/19/2022]
Abstract
Malonyl coenzyme A (CoA) decarboxylase (EC 4.1.1.9, MCD) deficiency, or malonic aciduria, is a rare inborn error of metabolism characterised by a variable phenotype of developmental delay, seizures, cardiomyopathy and acidosis. There is no consensus for dietary treatment in this condition. This case describes the effect of a long-chain triglyceride (LCT)-restricted/medium-chain triglyceride (MCT)-supplemented diet upon the progress of an affected child. A full-term Asian girl of birth weight 3590 g was screened for malonic aciduria after birth due to a positive family history. She had elevated urine malonic and methylmalonic acids and was presumably homozygous for a deleterious mutation in the MLYCD gene. Her echocardiography showed mild cardiomyopathy at 0.5 months of age, but heart function was good. She was treated with carnitine 100 mg/kg per day and continued a high-energy formula feed, as her growth was slow. At 3 months of age, echocardiography showed deteriorating cardiac function with a fractional shortening of 18%. She started an angiotensin-converting enzyme (ACE) inhibitor (Captopril). Over the next few months, her diet was altered to comprise 1.9% energy from LCT, 25% from MCT and the remainder carbohydrate. Cardiac function improved and was optimal at 23 months of age, with a fractional shortening of 28% and good systolic function. During a period of low MCT intake, her cardiac function was noted to deteriorate. This reversed and stabilised following reinstatement of the diet. This case of malonic aciduria with cardiomyopathy demonstrates improvement in cardiac function attributable to LCT-restricted/MCT-supplemented diet.
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Affiliation(s)
- E J Footitt
- Metabolic Office, Department Metabolic Medicine, Great Ormond Street Hospital for Children, 7th Floor Southwood Building, Great Ormond Street, London WC1N 3JH, UK.
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Sutendra G, Bonnet S, Rochefort G, Haromy A, Folmes KD, Lopaschuk GD, Dyck JRB, Michelakis ED. Fatty Acid Oxidation and Malonyl-CoA Decarboxylase in the Vascular Remodeling of Pulmonary Hypertension. Sci Transl Med 2010; 2:44ra58. [DOI: 10.1126/scitranslmed.3001327] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Mirandola SR, Melo DR, Saito A, Castilho RF. 3-nitropropionic acid-induced mitochondrial permeability transition: comparative study of mitochondria from different tissues and brain regions. J Neurosci Res 2010; 88:630-9. [PMID: 19795369 DOI: 10.1002/jnr.22239] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The adult rat striatum is particularly vulnerable to systemic administration of the succinate dehydrogenase inhibitor 3-nitropropionic acid (3NP), which is known to induce degeneration of the caudate-putamen, as occurs in Huntington's disease. The aim of the present study was to compare the susceptibility of isolated mitochondria from different rat brain regions (striatum, cortex, and cerebellum) as well as from the liver, kidney, and heart to mitochondrial permeability transition (MPT) induced by 3NP and Ca(2+). In the presence of micromolar Ca(2+) concentrations, 3NP induces MPT in a dose-dependent manner, as estimated by mitochondrial swelling and a decrease in the transmembrane electrical potential. A 3NP concentration capable of promoting a 10% inhibition of ADP-stimulated, succinate-supported respiration was sufficient to stimulate Ca(2+)-induced MPT. Brain and heart mitochondria were generally more sensitive to 3NP and Ca(2+)-induced MPT than mitochondria from liver and kidney. In addition, a partial inhibition of mitochondrial respiration by 3NP resulted in more pronounced MPT in striatal mitochondria than in cortical or cerebellar organelles. A similar inhibition of succinate dehydrogenase activity was observed in rat tissue homogenates obtained from various brain regions as well as from liver, kidney, and heart 24 hr after a single i.p. 3NP dose. Mitochondria isolated from forebrains of 3NP-treated rats were also more susceptible to Ca(2+)-induced MPT than those of control rats. We propose that the increased susceptibility of the striatum to 3NP-induced neurodegeneration may be partially explained by its susceptibility to MPT, together with the greater vulnerability of this brain region to glutamate receptor-mediated Ca(2+) influx.
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Affiliation(s)
- Sandra R Mirandola
- Departamento de Patologia Clínica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas , Campinas, Brazil
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Kamate M, Chetal V, Kulgod V, Patil V, Christopher R. Profile of inborn errors of metabolism in a tertiary care centre PICU. Indian J Pediatr 2010; 77:57-60. [PMID: 20135269 DOI: 10.1007/s12098-010-0008-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Accepted: 07/02/2009] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To study the clinico-investigative profile and outcome of patients with inborn errors of metabolism (IEM) presenting to the pediatric intensive care unit (PICU). METHODS Records of all patients admitted in tertiary care centre PICU between August 2007 and September 2008 with a diagnosis of IEM were retrieved the details of clinical presentation, laboratory results, treatment and outcome were noted and analysed. RESULTS Eleven (2.6%) out of 420 PICU admissions during the study period had a diagnosis of IEM with a high mortality rate of 36%. Clinical presentation was quite varied. CONCLUSION IEM are not uncommon in PICU. Simple biochemical tests and neuroimaging findings provide vital clues to the diagnosis of IEM.
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Affiliation(s)
- Mahesh Kamate
- Department of Pediatrics, KLE University's J.N. Medical College and KLES PK Hospital, Belgaum, India.
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Fingerhut R, Olgemöller B. Newborn screening for inborn errors of metabolism and endocrinopathies: an update. Anal Bioanal Chem 2008; 393:1481-97. [DOI: 10.1007/s00216-008-2505-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 09/16/2008] [Accepted: 10/16/2008] [Indexed: 11/29/2022]
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