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Wu L, Ye C, Yao Q, Li Q, Zhang C, Li Y. The role of serum acylcarnitine profiling for the detection of multiple solid tumors in humans. Heliyon 2024; 10:e23867. [PMID: 38205321 PMCID: PMC10776988 DOI: 10.1016/j.heliyon.2023.e23867] [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: 03/28/2023] [Revised: 11/28/2023] [Accepted: 12/14/2023] [Indexed: 01/12/2024] Open
Abstract
Metabolic reprogramming is an essential hallmark of cancer. Several studies have reported the dysregulation of acylcarnitine (ACar) metabolism in tumor cells, suggesting that changes in the blood ACar may be related to tumor growth. Accordingly, this study aimed to understand the alteration of serum ACar profiles in various solid tumors and explore the potential of differential serum ACars as diagnostic biomarkers. A series of 69 relatively abundant ACars were identified via untargeted analysis. Then, targeted metabolomics was used to describe the metabolic alterations in ACars between normal controls and patients with six types of solid tumors. The results suggested that changes in ACars correlated with their carbon chain length and saturation. The six tumor types had highly similar ACar metabolic profiles, indicating similar fatty acid oxidation (FAO) metabolic pathways. Moreover, the receiver operating curve analysis of differential ACars showed that 16 ACars (C8-C14) had high diagnostic capability towards the studied solid tumors. Specifically, the area under the curve of ACar 10:2 isomer2 and ACar 12:2 isomer2 was greater than 0.95. In conclusion, the marked decrease in the levels of medium- and long-chain ACars (C8-C18) in the six solid tumors suggests that they may have similar FAO-based metabolic pathways, which could afford a common target for cancer therapy. Additionally, 16 ACars (C8-C14) were identified as potential biomarkers for diagnosing six types of solid tumors.
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Affiliation(s)
| | | | | | - Qianqian Li
- Department of Research, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Chunyan Zhang
- Department of Research, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Yuandong Li
- Department of Research, Guangxi Medical University Cancer Hospital, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
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2
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Zhang J, Chen Q, Zhang L, Shi B, Yu M, Huang Q, Tang H. Simultaneously quantifying hundreds of acylcarnitines in multiple biological matrices within ten minutes using ultrahigh-performance liquid-chromatography and tandem mass spectrometry. J Pharm Anal 2024; 14:140-148. [PMID: 38352947 PMCID: PMC10859589 DOI: 10.1016/j.jpha.2023.10.004] [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: 05/06/2023] [Revised: 09/28/2023] [Accepted: 10/14/2023] [Indexed: 02/16/2024] Open
Abstract
Acylcarnitines are metabolic intermediates of fatty acids and branched-chain amino acids having vital biofunctions and pathophysiological significances. Here, we developed a high-throughput method for quantifying hundreds of acylcarnitines in one run using ultrahigh performance liquid chromatography and tandem mass spectrometry (UPLC-MS/MS). This enabled simultaneous quantification of 1136 acylcarnitines (C0-C26) within 10-min with good sensitivity (limit of detection < 0.7 fmol), linearity (correlation coefficient > 0.992), accuracy (relative error < 20%), precision (coefficient of variation (CV), CV < 15%), stability (CV < 15%), and inter-technician consistency (CV < 20%, n = 6). We also established a quantitative structure-retention relationship (goodness of fit > 0.998) for predicting retention time (tR) of acylcarnitines with no standards and built a database of their multiple reaction monitoring parameters (tR, ion-pairs, and collision energy). Furthermore, we quantified 514 acylcarnitines in human plasma and urine, mouse kidney, liver, heart, lung, and muscle. This provides a rapid method for quantifying acylcarnitines in multiple biological matrices.
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Affiliation(s)
- Jingxian Zhang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular Phenomics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Qinsheng Chen
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular Phenomics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Lianglong Zhang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular Phenomics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Biru Shi
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular Phenomics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Men Yu
- Wuhan Laboratory for Shanghai Metabolome Institute (SMI) Ltd., Wuhan, 430000, China
| | - Qingxia Huang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular Phenomics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Huiru Tang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular Phenomics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
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3
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Identifying a metabolomics profile associated with masked hypertension in two independent cohorts: Data from the African-PREDICT and SABPA studies. Hypertens Res 2022; 45:1781-1793. [PMID: 36056205 DOI: 10.1038/s41440-022-01010-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/27/2022] [Accepted: 07/21/2022] [Indexed: 12/15/2022]
Abstract
Individuals with masked hypertension (MHT) have a greater risk of adverse cardiovascular outcomes than normotensive (NT) individuals. Exploring metabolomic differences between NT and MHT individuals may help provide a better understanding of the etiology of MHT. We analyzed data from 910 young participants (83% NT and 17% MHT) (mean age 24 ± 3 years) from the African-PREDICT and 210 older participants (63% NT and 37% MHT) from the SABPA (mean age 42 ± 9.6 years) studies. Clinic and ambulatory blood pressures (BPs) were used to define BP phenotypes. Urinary amino acids and acylcarnitines were measured using liquid chromatography time-of-flight mass spectrometry in SABPA and liquid chromatography tandem mass spectrometry in the African-PREDICT studies. In the SABPA study, amino acids (leucine/isoleucine, valine, methionine, phenylalanine), free carnitine (C0-carnitine), and acylcarnitines C3 (propionyl)-, C4 (butyryl)-carnitine and total acylcarnitine) were higher in MHT than NT adults. In the African-PREDICT study, C0- and C5-carnitines were higher in MHT individuals. With unadjusted analyses in NT adults from the SABPA study, ambulatory SBP correlated positively with only C3-carnitine. In MHT individuals, positive correlations of ambulatory SBP with leucine/isoleucine, valine, methionine, phenylalanine, C0-carnitine and C3-carnitine were evident (all p < 0.05). In the African-PREDICT study, ambulatory SBP correlated positively with C0-carnitine (r = 0.101; p = 0.006) and C5-carnitine (r = 0.195; p < 0.001) in NT adults and C5-carnitine in MHT individuals (r = 0.169; p = 0.034). We demonstrated differences between the metabolomic profiles of NT and MHT adults, which may reflect different stages in the alteration of branched-chain amino acid metabolism early on and later in life.
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4
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Baird S, Frazee CC, Garg U. Quantification of Free and Total Carnitine in Serum Using Liquid Chromatography Tandem Mass Spectrometry. Methods Mol Biol 2022; 2546:95-104. [PMID: 36127581 DOI: 10.1007/978-1-0716-2565-1_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
L-carnitine is a crucial component for transporting long-chained fatty acids from the cytosol into the mitochondrial matrix for fatty acid oxidation. During this process, carnitine forms numerous acylcarnitines before being recycled into the cytosol. Abnormal levels of free carnitine, total carnitine, and acylcarnitines in serum can be indicative of a metabolic disorder before symptoms are present. A liquid chromatography tandem mass spectrometry (LC-MS/MS) method is described for the determination of free and total carnitine in serum. To measure total carnitine, samples are spiked with deuterated carnitine (internal standard) and hydrolyzed with potassium hydroxide to convert acylcarnitines to carnitine. The reaction is quenched by the addition of hydrochloric acid. Carnitine is extracted via a methanolic protein precipitation. The solution is then injected on LC-MS/MS for analysis to determine the carnitine concentration using multiple-reaction monitoring.
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Affiliation(s)
- Serena Baird
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO, USA
| | - C Clinton Frazee
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO, USA
| | - Uttam Garg
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO, USA. .,University of Missouri School of Medicine, Kansas City, MO, USA.
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Luque-Córdoba D, Calderón-Santiago M, Priego-Capote F. Combining data acquisition modes in liquid-chromatography-tandem mass spectrometry for comprehensive determination of acylcarnitines in human serum. Metabolomics 2022; 18:59. [PMID: 35859020 PMCID: PMC9300566 DOI: 10.1007/s11306-022-01916-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/27/2022] [Indexed: 11/27/2022]
Abstract
Acylcarnitines (ACs) are metabolites involved in fatty acid β-oxidation and organic acid metabolism. Metabolic disorders associated to these two processes can be evaluated by determining the complete profile of ACs. In this research, we present an overall strategy for identification, confirmation, and quantitative determination of acylcarnitines in human serum. By this strategy we identified the presence of 47 ACs from C2 to C24 with detection of the unsaturation degree by application of a data-independent acquisition (DIA) liquid chromatography-tandem mass spectrometry (LC-MS/MS) method. Complementary, quantitative determination of ACs is based on a high-throughput and fully automated method consisting of solid-phase extraction on-line coupled to LC-MS/MS in data-dependent acquisition (DDA) to improve analytical features avoiding the errors associated to sample processing. Quantitation limits were at pg mL-1 level, the intra-day and between-day variability were below 15-20%, respectively; and the accuracy, expressed as bias, was always within ± 25%. The proposed method was tested with 40 human volunteers to determine the relative concentration of ACs in serum and identify predominant forms. Significant differences were detected by comparing the ACs profile of obese versus non-obese individuals.
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Affiliation(s)
- D Luque-Córdoba
- Department of Analytical Chemistry, University of Córdoba, Annex Marie Curie Building, Campus of Rabanales, Córdoba, Spain
- Nanochemistry University Institute (IUNAN), University of Córdoba, Campus of Rabanales, Córdoba, Spain
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofía University Hospital, University of Córdoba, Córdoba, Spain
- Consortium for Biomedical Research in Frailty & Healthy Ageing, Carlos III Institute of Health, CIBERFES, Madrid, Spain
| | - M Calderón-Santiago
- Department of Analytical Chemistry, University of Córdoba, Annex Marie Curie Building, Campus of Rabanales, Córdoba, Spain
- Nanochemistry University Institute (IUNAN), University of Córdoba, Campus of Rabanales, Córdoba, Spain
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofía University Hospital, University of Córdoba, Córdoba, Spain
- Consortium for Biomedical Research in Frailty & Healthy Ageing, Carlos III Institute of Health, CIBERFES, Madrid, Spain
| | - F Priego-Capote
- Department of Analytical Chemistry, University of Córdoba, Annex Marie Curie Building, Campus of Rabanales, Córdoba, Spain.
- Nanochemistry University Institute (IUNAN), University of Córdoba, Campus of Rabanales, Córdoba, Spain.
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofía University Hospital, University of Córdoba, Córdoba, Spain.
- Consortium for Biomedical Research in Frailty & Healthy Ageing, Carlos III Institute of Health, CIBERFES, Madrid, Spain.
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Meikopoulos T, Deda O, Karagiannidis E, Sianos G, Theodoridis G, Gika H. A HILIC-MS/MS method development and validation for the quantitation of 13 acylcarnitines in human serum. Anal Bioanal Chem 2022; 414:3095-3108. [PMID: 35178602 DOI: 10.1007/s00216-022-03940-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 12/12/2022]
Abstract
Acylcarnitines are essential diagnostic markers for complex diseases and fatty acid metabolism disorders, and play an important role in cardiovascular diseases. Herein, a HILIC-MS/MS method was developed and validated for the rapid quantitation of the acylcarnitines C2, C3, C4, C5, C6, C8, C10, C12, C14, C16, C18, C18:1 and C18:2 in human serum. RPLC and HILIC modes were tested, and HILIC was selected since it provided optimum analyte separation. Intra- and interday accuracy ranged from 90.4% to 114% and from 96% to 112%, respectively, while intra- and interday precision ranged from 0.37% to 13.7% and from 1.3% to 9.5%, respectively. A limit of quantitation (LOQ) of 78.1 ng/mL was found for C2, 2.4 ng/mL for C3, C18:1 and C18:2, and 1.2 ng/mL for C4, C5, C6, C8, C10, C12, C14, C16, and C18. Method validation was performed in accordance with bioanalytical method guidelines. Subsequently the method was applied in the analysis of approximately 1040 samples from patients with coronary artery disease.
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Affiliation(s)
- Thomas Meikopoulos
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.,BIOMIC_Auth, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B.1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
| | - Olga Deda
- BIOMIC_Auth, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B.1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece.,Laboratory of Forensic Medicine and Toxicology, Medical School, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Efstratios Karagiannidis
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, St. Kiriakidi 1, 54636, Thessaloniki, Greece
| | - Georgios Sianos
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, St. Kiriakidi 1, 54636, Thessaloniki, Greece
| | - Georgios Theodoridis
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.,BIOMIC_Auth, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B.1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
| | - Helen Gika
- BIOMIC_Auth, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B.1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece. .,Laboratory of Forensic Medicine and Toxicology, Medical School, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
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7
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Luna C, Griffin C, Miller MJ. A clinically validated method to separate and quantify underivatized acylcarnitines and carnitine metabolic intermediates using mixed-mode chromatography with tandem mass spectrometry. J Chromatogr A 2021; 1663:462749. [PMID: 34954532 DOI: 10.1016/j.chroma.2021.462749] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 10/19/2022]
Abstract
Acylcarnitines are intermediate metabolites of the mitochondria that serve as biomarkers for inherited disorders of fatty acid oxidation and amino acid metabolism. The prevailing clinical method used to quantify acylcarnitines involves flow-injection tandem mass spectrometry, an approach with a number of limitations; foremost the inability to separate and therefore distinguish key isobaric acylcarnitine species. To address these issues, we report a clinically validated liquid chromatography tandem mass spectrometry method to quantify acylcarnitines, free carnitine, and carnitine metabolic intermediates in human plasma. Importantly, this method resolves clinically relevant isobaric and isomeric acylcarnitine species in a single 22 min analysis without the use of ion pairing or derivatization reagents. This unique combination of features is not achievable by existing acylcarnitine methods and is made possible by the use of a novel mixed-mode chromatographic separation. Further clinical validation studies demonstrate excellent limits of quantification, linearity, accuracy, and inter-assay precision for analyses of 38 different calibrated analytes. An additional 28 analytes are semi-quantitatively analyzed using surrogate calibrators. The study of residual patient specimens confirms the clinical utility of this method and suggests expanded applicability to the diagnosis of peroxisomal disorders. In summary, we report a clinically validated acylcarnitine method that utilizes a novel mixed-mode chromatographic separation to provide a number of advantages in terms of specificity, accuracy, sample preparation time, and clinical utility.
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Affiliation(s)
- Carolina Luna
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, 975 W. Walnut St., IB-344C, Indianapolis, IN 46202, United States
| | - Chandler Griffin
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, 975 W. Walnut St., IB-344C, Indianapolis, IN 46202, United States
| | - Marcus J Miller
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, 975 W. Walnut St., IB-344C, Indianapolis, IN 46202, United States.
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9
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Villaseñor A, Godzien J, Barker-Tejeda TC, Gonzalez-Riano C, López-López Á, Dudzik D, Gradillas A, Barbas C. Analytical approaches for studying oxygenated lipids in the search of potential biomarkers by LC-MS. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Tang T, Zhang P, Li S, Xu D, Li W, Tian Y, Jiao Y, Zhang Z, Xu F. Absolute Quantification of Acylcarnitines Using Integrated Tmt-PP Derivatization-Based LC-MS/MS and Quantitative Analysis of Multi-Components by a Single Marker Strategy. Anal Chem 2021; 93:12973-12980. [PMID: 34529423 DOI: 10.1021/acs.analchem.1c02606] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Acylcarnitines (ACs) play important roles in the fatty acid β-oxidation and are considered as diagnostic markers for many diseases. Accurate determination of ACs remains challenging due to their low abundance, high structure diversity, and limited availability of standard compounds. In this study, microwave-assisted Tmt-PP (p-[3,5-(dimethylamino)-2,4,6-triazine] benzene-1-sulfonyl piperazine) derivatization was utilized to facilitate the liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) determination of ACs. The result indicated that Tmt-PP labeling enables the prediction of the retention time and MS response of ACs and enhances their MS response up to 4 times. The introduction of the microwave during the derivatization procedure greatly improved the reaction efficiency, demonstrated by the shortened reaction time from 90 to 1 min. Furthermore, we applied a strategy named quantitative analysis of multi-components by a single marker (QAMS) for the assay of 26 ACs with only 5 AC standards, solving the standard availability issue to a large extent. The established workflow was applied to discover dysregulated ACs in xenograft colon cancer mice, and the quantification results were highly comparable with traditional methods where there were the corresponding standards for each AC. Our study demonstrated that chemical derivatization-based LC-MS/MS integrated with the QAMS strategy is robust for the identification and quantification of ACs and has great potential in targeted metabolomics study.
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Affiliation(s)
- Tian Tang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Pei Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Siqi Li
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Doudou Xu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Wei Li
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Yuan Tian
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Yu Jiao
- Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Zunjian Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Fengguo Xu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), State Key Laboratory of Natural Medicine, China Pharmaceutical University, Nanjing 210009, P. R. China
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11
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Laboratory analysis of acylcarnitines, 2020 update: a technical standard of the American College of Medical Genetics and Genomics (ACMG). Genet Med 2020; 23:249-258. [PMID: 33071282 DOI: 10.1038/s41436-020-00990-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 02/06/2023] Open
Abstract
Acylcarnitine analysis is a useful test for identifying patients with inborn errors of mitochondrial fatty acid β-oxidation and certain organic acidemias. Plasma is routinely used in the diagnostic workup of symptomatic patients. Urine analysis of targeted acylcarnitine species may be helpful in the diagnosis of glutaric acidemia type I and other disorders in which polar acylcarnitine species accumulate. For newborn screening applications, dried blood spot acylcarnitine analysis can be performed as a multiplex assay with other analytes, including amino acids, succinylacetone, guanidinoacetate, creatine, and lysophosphatidylcholines. Tandem mass spectrometric methodology, established more than 30 years ago, remains a valid approach for acylcarnitine analysis. The method involves flow-injection analysis of esterified or underivatized acylcarnitines species and detection using a precursor-ion scan. Alternative methods utilize liquid chromatographic separation of isomeric and isobaric species and/or detection by selected reaction monitoring. These technical standards were developed as a resource for diagnostic laboratory practices in acylcarnitine analysis, interpretation, and reporting.
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12
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Gill BD, Indyk HE, Kobayashi T, McGrail IJ, Woollard DC. Comparison of LC-MS/MS and Enzymatic Methods for the Determination of Total Choline and Total Carnitine in Infant Formula and Milk Products. J AOAC Int 2020; 103:1293-1300. [PMID: 33241401 DOI: 10.1093/jaoacint/qsaa060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/31/2020] [Accepted: 04/17/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND Choline and l-carnitine are classified as pseudo-vitamins because of their conditionally essential status. As they are involved in multiple physiological metabolic pathways in the human body, they are routinely fortified in infant and adult nutritional formulas. OBJECTIVE The performance of an LC-MS/MS method for the analysis of choline and carnitine, compared with enzymatic methods in routine use for the analysis of total carnitine and total choline, is described. METHOD Powder samples were reconstituted, with release of carnitine and choline facilitated by both acid and alkaline hydrolysis and the extract analyzed by LC-MS/MS. Quantitation was by internal standard technique using deuterium-labeled carnitine and deuterium-labeled choline. RESULTS Method range, specificity, sensitivity, precision, recovery, accuracy, and ruggedness were assessed for milk powders, infant formulas, and soy- and milk-based nutritional products. Spike recoveries of 94.0-108.4% were obtained for both total carnitine and choline, and no statistical bias (α = 0.05) between measured results and certified values (choline: P = 0.36; free carnitine: P = 0.67) was found for NIST 1849a certified reference material (NIST1849a). Precision, as repeatability relative standard deviation (RSD), was 2.0% RSDr for total carnitine and 1.7% RSDr for total choline. Equivalent results for total choline and total carnitine were obtained by LC-MS/MS and enzymatic methods (n = 30). CONCLUSIONS The described LC-MS/MS method is fit for purpose for routine product compliance release testing environments. This validation study has confirmed that alternative enzymatic assays can be used with confidence in laboratories in which LC-MS/MS platforms are unavailable. HIGHLIGHTS An LC-MS/MS method was evaluated and found to be fit-for-purpose for routine product compliance release testing of infant formula. The LC-MS/MS method was compared with enzymatic methods for the analysis of total carnitine and total choline. Alternative enzymatic assays can be used with confidence in laboratories in which LC-MS/MS platforms are unavailable.
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Affiliation(s)
- Brendon D Gill
- Fonterra Co-operative Group Ltd, P.O. Box 7, Waitoa 3380, New Zealand
| | - Harvey E Indyk
- Fonterra Co-operative Group Ltd, P.O. Box 7, Waitoa 3380, New Zealand
| | - Tadashi Kobayashi
- Fonterra Co-operative Group Ltd, P.O. Box 7, Waitoa 3380, New Zealand
| | - Iain J McGrail
- Fonterra Co-operative Group Ltd, P.O. Box 7, Waitoa 3380, New Zealand
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Blackburn ML, Ono-Moore KD, Sobhi HF, Adams SH. Carnitine palmitoyltransferase 2 knockout potentiates palmitate-induced insulin resistance in C 2C 12 myotubes. Am J Physiol Endocrinol Metab 2020; 319:E265-E275. [PMID: 32459525 DOI: 10.1152/ajpendo.00515.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Saturated fatty acids (SFAs) are implicated in muscle inflammation/cell stress and insulin resistance, but the catalog of factors involved is incomplete. SFA derivatives that accumulate with mismatched FA availability and FA oxidation (FAO) are likely involved, and evidence has emerged that select acylcarnitines should be considered. To understand if excessive long-chain acylcarnitine accumulation and limited FAO associate with lipotoxicity, carnitine palmitoyltransferase 2 knockout C2C12 cells were generated (CPT2 KO). CPT2 KO was confirmed by Western blot, increased palmitoylcarnitine accumulation, and loss of FAO capacity. There was no effect of CPT2 KO on palmitic acid (PA) concentration-dependent increases in media IL-6 or adenylate kinase. PA at 200 and 500 µM did not trigger cell stress responses (phospho-Erk, -JNK, or -p38) above that of vehicle in WT or CPT2 KO cells. In contrast, loss of CPT2 exacerbated PA-induced insulin resistance (acute phospho-Akt; 10 or 100 nM insulin) by as much as ~50-96% compared with WT. Growing cells in carnitine-free media abolished differences between WT and CPT2 KO, but this did not fully rescue PA-induced insulin resistance. The results suggest that PA-induced insulin resistance stems in part from palmitoylcarnitine accumulation, further supporting the hypothesis that select acylcarnitines participate in cell signaling and, when in excess, can compromise cell function. Since carnitine-free conditions could not fully rescue insulin signaling, and CPT2 KO did not alter cell stress responses, the majority of PA-induced "lipotoxicity" in C2C12 myotubes cannot be attributed to palmitoylcarnitine alone.
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Affiliation(s)
- Michael L Blackburn
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | | | - Hany F Sobhi
- Center for Organic Synthesis, Department of Natural Sciences, Coppin State University, Baltimore, Maryland
| | - Sean H Adams
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
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14
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Menzies V, Starkweather A, Yao Y, Kelly DL, Garrett TJ, Yang G, Booker S, Swift-Scanlan T, Mahmud I, Lyon DE. Exploring Associations Between Metabolites and Symptoms of Fatigue, Depression and Pain in Women With Fibromyalgia. Biol Res Nurs 2020; 23:119-126. [PMID: 32677448 DOI: 10.1177/1099800420941109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Fibromyalgia (FM) is a chronic noncommunicable disorder characterized by a constellation of symptoms that include fatigue, depression and chronic pain. FM affects 2%-8% of the U.S. population, 2% of the global population, with 61%-90% of FM diagnoses attributed to women. Key causal factors leading to the development and severity of FM-related symptoms have not yet been identified. The purpose of this article is to report relationships among identified metabolites and levels of fatigue, depression, pain severity, and pain interference in a sample of 20 women with FM. In this secondary analysis, we conducted global metabolomic analysis and examined the data for relationships of metabolite levels with self-reported symptoms of fatigue, depression, pain severity, and pain interference. Results revealed six metabolites (6-deoxy-hexose; pantothenic acid; ergothioneine; l-carnitine; n-acetylserotonin; butyrobetaine) and their associated metabolic pathways such as carnitine synthesis, lipid oxidation, tryptophan metabolism, beta-alanine metabolism and pantothenic and Coenzyme-A biosynthesis that were either positively or inversely related to pain severity, pain interference, or both. The preliminary data presented suggest that metabolites representing energy, amino acid, or lipid classification may be associated with pain symptom severity and interference in women with FM. Future work will confirm these findings in a large, comparative cohort, targeting metabolites and metabolite pathways to better understand the relationships of metabolites and symptomology.
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Affiliation(s)
- Victoria Menzies
- 3463University of Florida College of Nursing, Gainesville, FL, USA
| | | | - Yingwei Yao
- 3463University of Florida College of Nursing, Gainesville, FL, USA
| | | | | | - GeeSu Yang
- 3463University of Florida College of Nursing, Gainesville, FL, USA
| | - Staja Booker
- 3463University of Florida College of Nursing, Gainesville, FL, USA
| | | | - Iqbal Mahmud
- 3463University of Florida College of Nursing, Gainesville, FL, USA
| | - Debra E Lyon
- 3463University of Florida College of Nursing, Gainesville, FL, USA
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15
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Applying mass spectrometry-based assays to explore gut microbial metabolism and associations with disease. ACTA ACUST UNITED AC 2020; 58:719-732. [DOI: 10.1515/cclm-2019-0974] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/06/2019] [Indexed: 12/14/2022]
Abstract
AbstractThe workings of the gut microbiome have gained increasing interest in recent years through the mounting evidence that the microbiota plays an influential role in human health and disease. A principal focus of this research seeks to further understand the production of metabolic by-products produced by bacteria resident in the gut, and the subsequent interaction of these metabolites on host physiology and pathophysiology of disease. Gut bacterial metabolites of interest are predominately formed via metabolic breakdown of dietary compounds including choline and ʟ-carnitine (trimethylamine N-oxide), amino acids (phenol- and indole-containing uremic toxins) and non-digestible dietary fibers (short-chain fatty acids). Investigations have been accelerated through the application of mass spectrometry (MS)-based assays to quantitatively assess the concentration of these metabolites in laboratory- and animal-based experiments, as well as for direct circulating measurements in clinical research populations. This review seeks to explore the impact of these metabolites on disease, as well as to introduce the application of MS for those less accustomed to its use as a clinical tool, highlighting pertinent research related to its use for measurements of gut bacteria-mediated metabolites to further understand their associations with disease.
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16
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Li S, Gao D, Jiang Y. Function, Detection and Alteration of Acylcarnitine Metabolism in Hepatocellular Carcinoma. Metabolites 2019; 9:E36. [PMID: 30795537 PMCID: PMC6410233 DOI: 10.3390/metabo9020036] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/07/2019] [Accepted: 02/14/2019] [Indexed: 01/01/2023] Open
Abstract
Acylcarnitines play an essential role in regulating the balance of intracellular sugar and lipid metabolism. They serve as carriers to transport activated long-chain fatty acids into mitochondria for β-oxidation as a major source of energy for cell activities. The liver is the most important organ for endogenous carnitine synthesis and metabolism. Hepatocellular carcinoma (HCC), a primary malignancy of the live with poor prognosis, may strongly influence the level of acylcarnitines. In this paper, the function, detection and alteration of acylcarnitine metabolism in HCC were briefly reviewed. An overview was provided to introduce the metabolic roles of acylcarnitines involved in fatty acid β-oxidation. Then different analytical platforms and methodologies were also briefly summarised. The relationship between HCC and acylcarnitine metabolism was described. Many of the studies reported that short, medium and long-chain acylcarnitines were altered in HCC patients. These findings presented current evidence in support of acylcarnitines as new candidate biomarkers for studies on the pathogenesis and development of HCC. Finally we discussed the challenges and perspectives of exploiting acylcarnitine metabolism and its related metabolic pathways as a target for HCC diagnosis and prognosis.
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Affiliation(s)
- Shangfu Li
- State Key Laboratory of Chemical Oncogenomics, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- National & Local United Engineering Lab for Personalized Anti-tumour Drugs, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Dan Gao
- State Key Laboratory of Chemical Oncogenomics, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- National & Local United Engineering Lab for Personalized Anti-tumour Drugs, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- Key Laboratory of Metabolomics at Shenzhen, Shenzhen 518055, China.
| | - Yuyang Jiang
- State Key Laboratory of Chemical Oncogenomics, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China.
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17
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Violante S, Achetib N, van Roermund CWT, Hagen J, Dodatko T, Vaz FM, Waterham HR, Chen H, Baes M, Yu C, Argmann CA, Houten SM. Peroxisomes can oxidize medium- and long-chain fatty acids through a pathway involving ABCD3 and HSD17B4. FASEB J 2018; 33:4355-4364. [PMID: 30540494 DOI: 10.1096/fj.201801498r] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Peroxisomes are essential organelles for the specialized oxidation of a wide variety of fatty acids, but they are also able to degrade fatty acids that are typically handled by mitochondria. Using a combination of pharmacological inhibition and clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR associated protein 9 genome editing technology to simultaneously manipulate peroxisomal and mitochondrial fatty acid β-oxidation (FAO) in HEK-293 cells, we identified essential players in the metabolic crosstalk between these organelles. Depletion of carnitine palmitoyltransferase (CPT)2 activity through pharmacological inhibition or knockout (KO) uncovered a significant residual peroxisomal oxidation of lauric and palmitic acid, leading to the production of peroxisomal acylcarnitine intermediates. Generation and analysis of additional single- and double-KO cell lines revealed that the D-bifunctional protein (HSD17B4) and the peroxisomal ABC transporter ABCD3 are essential in peroxisomal oxidation of lauric and palmitic acid. Our results indicate that peroxisomes not only accept acyl-CoAs but can also oxidize acylcarnitines in a similar biochemical pathway. By using an Hsd17b4 KO mouse model, we demonstrated that peroxisomes contribute to the plasma acylcarnitine profile after acute inhibition of CPT2, proving in vivo relevance of this pathway. We summarize that peroxisomal FAO is important when mitochondrial FAO is defective or overloaded.-Violante, S., Achetib, N., van Roermund, C. W. T., Hagen, J., Dodatko, T., Vaz, F. M., Waterham, H. R., Chen, H., Baes, M., Yu, C., Argmann, C. A., Houten, S. M. Peroxisomes can oxidize medium- and long-chain fatty acids through a pathway involving ABCD3 and HSD17B4.
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Affiliation(s)
- Sara Violante
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Mount Sinai Genomics, Incorporated, New York, New York, USA
| | - Nihad Achetib
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Carlo W T van Roermund
- Department of Clinical Chemistry, Amsterdam, The Netherlands.,Department of Pediatrics, Amsterdam, The Netherlands.,Laboratory Genetic Metabolic Diseases, Amsterdam, The Netherlands; and
| | - Jacob Hagen
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Tetyana Dodatko
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Frédéric M Vaz
- Department of Clinical Chemistry, Amsterdam, The Netherlands.,Department of Pediatrics, Amsterdam, The Netherlands.,Laboratory Genetic Metabolic Diseases, Amsterdam, The Netherlands; and
| | - Hans R Waterham
- Department of Clinical Chemistry, Amsterdam, The Netherlands.,Department of Pediatrics, Amsterdam, The Netherlands.,Laboratory Genetic Metabolic Diseases, Amsterdam, The Netherlands; and
| | - Hongjie Chen
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Mount Sinai Genomics, Incorporated, New York, New York, USA
| | - Myriam Baes
- Laboratory of Cell Metabolism, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven-University of Leuven, Leuven, Belgium
| | - Chunli Yu
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Mount Sinai Genomics, Incorporated, New York, New York, USA
| | - Carmen A Argmann
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Sander M Houten
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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18
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Han J, Higgins R, Lim MD, Atkinson K, Yang J, Lin K, Borchers CH. Isotope-labeling derivatization with 3-nitrophenylhydrazine for LC/multiple-reaction monitoring-mass-spectrometry-based quantitation of carnitines in dried blood spots. Anal Chim Acta 2018; 1037:177-187. [DOI: 10.1016/j.aca.2018.01.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/19/2018] [Accepted: 01/21/2018] [Indexed: 12/25/2022]
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19
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Yu D, Zhou L, Xuan Q, Wang L, Zhao X, Lu X, Xu G. Strategy for Comprehensive Identification of Acylcarnitines Based on Liquid Chromatography–High-Resolution Mass Spectrometry. Anal Chem 2018; 90:5712-5718. [DOI: 10.1021/acs.analchem.7b05471] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Di Yu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lina Zhou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qiuhui Xuan
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lichao Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinjie Zhao
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xin Lu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Guowang Xu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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20
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Abstract
Urine is a biological matrix that contains hundreds of metabolic end products which constitute the urinary metabolome. The development and advances on LC-MS/MS have revolutionized the analytical study of biomolecules by enabling their accurate identification and quantification in an unprecedented manner. Nowadays, LC-MS/MS is helping to unveil the complexity of urine metabolome, and the results obtained have multiple biomedical applications. This review focuses on the targeted LC-MS/MS analysis of the urine metabolome. In the first part, we describe general considerations (from sample collection to quantitation) required for a proper targeted metabolic analysis. In the second part, we address the urinary analysis and recent applications of four relevant families: amino acids, catecholamines, lipids and steroids.
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21
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Bhattacharyya S, Ali M, Smith WH, Minkler PE, Stoll MS, Hoppel CL, Adams SH. Anesthesia and bariatric surgery gut preparation alter plasma acylcarnitines reflective of mitochondrial fat and branched-chain amino acid oxidation. Am J Physiol Endocrinol Metab 2017; 313:E690-E698. [PMID: 28830869 PMCID: PMC5814600 DOI: 10.1152/ajpendo.00222.2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/14/2017] [Accepted: 08/14/2017] [Indexed: 01/08/2023]
Abstract
The period around bariatric surgery offers a unique opportunity to characterize metabolism responses to dynamic shifts in energy, gut function, and anesthesia. We analyzed plasma acylcarnitines in obese women (n = 17) sampled in the overnight fasted/postabsorptive state approximately 1-2 wk before surgery (condition A), the morning of surgery (prior restriction to a 48-h clear liquid diet coupled in some cases a standard polyethylene glycol gut evacuation: condition B), and following induction of anesthesia (condition C). Comparisons tested if 1) plasma acylcarnitine derivatives reflective of fatty acid oxidation (FAO) and xenometabolism would be significantly increased and decreased, respectively, by preoperative gut preparation/negative energy balance (condition A vs. B), and 2) anesthesia would acutely depress markers of FAO. Acylcarnitines associated with fat mobilization and FAO were significantly increased in condition B: long-chain acylcarnitines (i.e., C18:1, ~70%), metabolites from active but incomplete FAO [i.e., C14:1 (161%) and C14:2 (102%)] and medium- to short-chain acylcarnitines [i.e., C2 (91%), R-3-hydroxybutyryl-(245%), C6 (45%), and cis-3,4-methylene-heptanoyl-(17%), etc.]. Branched-chain amino acid markers displayed disparate patterns [i.e., isobutyryl-(40% decreased) vs. isovaleryl carnitine (51% increased)]. Anesthesia reduced virtually every acylcarnitine. These results are consistent with a fasting-type metabolic phenotype coincident with the presurgical "gut preparation" phase of bariatric surgery, and a major and rapid alteration of both fat and amino acid metabolism with onset of anesthesia. Whether presurgical or anesthesia-associated metabolic shifts in carnitine and fuel metabolism impact patient outcomes or surgical risks remains to be evaluated experimentally.
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Affiliation(s)
- Sudeepa Bhattacharyya
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Science, Little Rock, Arkansas
| | - Mohamed Ali
- Department of Surgery, University of California, Davis School of Medicine, Sacramento, California; and
| | - William H Smith
- Department of Surgery, University of California, Davis School of Medicine, Sacramento, California; and
| | - Paul E Minkler
- Department of Pharmacology, Case Western Reserve University, Cleveland, Ohio
| | - Maria S Stoll
- Department of Pharmacology, Case Western Reserve University, Cleveland, Ohio
| | - Charles L Hoppel
- Department of Pharmacology, Case Western Reserve University, Cleveland, Ohio
| | - Sean H Adams
- Arkansas Children's Nutrition Center, Little Rock, Arkansas;
- Department of Pediatrics, University of Arkansas for Medical Science, Little Rock, Arkansas
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22
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Minkler PE, Stoll MSK, Ingalls ST, Hoppel CL. Selective, Accurate, and Precise Quantitation of Glutarylcarnitine in Human Urine from a Patient with Glutaric Acidemia Type I. J Appl Lab Med 2017; 2:335-344. [DOI: 10.1373/jalm.2017.024281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/09/2017] [Indexed: 11/06/2022]
Abstract
Abstract
Background
Although correctly used in expanded newborn screening programs to identify patients with possible diseases, flow-injection tandem mass spectrometry (MS/MS) acylcarnitine “profiles” are inadequate for standard clinical uses owing to their limited quantitative accuracy and lack of selectivity. We report the application of our selective, accurate, and precise method for quantification of acylcarnitines, applied to urine glutarylcarnitine from a patient with glutaric acidemia type I (GAI).
Methods
A previously validated acylcarnitine ultra-HPLC-MS/MS method was used, with a focus on analysis of glutarylcarnitine. Calibrants and samples were isolated by solid-phase extraction and derivatized with pentafluorophenacyl trifluoromethanesulfonate. Acylcarnitine pentafluorophenacyl esters were eluted in 14-min chromatograms. Standardized calibrants and a 13-point, 200-fold concentration range calibration curve were used for accurate quantification of glutarylcarnitine. Quality control samples validated method accuracy and long-term analytic stability.
Results
Quantification of glutarylcarnitine in urine from a patient with GAI is reported. Long-term analytical stability of the method over a 5-year period is shown.
Conclusions
Our method for acylcarnitine quantification is shown to be selective, accurate, and precise; thus, we recommend it for confirmatory testing and monitoring of plasma and urine samples from patients with GAI.
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Affiliation(s)
- Paul E Minkler
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH
| | - Maria S K Stoll
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH
| | - Stephen T Ingalls
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH
| | - Charles L Hoppel
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH
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23
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Wei D, Liu J, Guo M, Zhu Y. Determination of betaine,l-carnitine, and choline in human urine using a self-packed column and column-switching ion chromatography with nonsuppressed conductivity detection. J Sep Sci 2017; 40:4246-4255. [DOI: 10.1002/jssc.201700545] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 08/13/2017] [Accepted: 08/21/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Dan Wei
- Department of Chemistry, Xixi Campus; Zhejiang University; Hangzhou China
| | - Junwei Liu
- Department of Chemistry, Xixi Campus; Zhejiang University; Hangzhou China
| | - Ming Guo
- Research Center of Analysis and Measurement; Zhejiang Research Institute of Chemical Industry; Hangzhou China
| | - Yan Zhu
- Department of Chemistry, Xixi Campus; Zhejiang University; Hangzhou China
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24
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Xiang L, Wei J, Tian XY, Wang B, Chan W, Li S, Tang Z, Zhang H, Cheang WS, Zhao Q, Zhao H, Yang Z, Hong Y, Huang Y, Cai Z. Comprehensive Analysis of Acylcarnitine Species in db/db Mouse Using a Novel Method of High-Resolution Parallel Reaction Monitoring Reveals Widespread Metabolic Dysfunction Induced by Diabetes. Anal Chem 2017; 89:10368-10375. [PMID: 28859482 DOI: 10.1021/acs.analchem.7b02283] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Acylcarnitines are exerting a variety of biological functions depending on the differences in lengths, saturation levels, and conjugation groups, which to a great extent contribute to the challenges of acylcarnitines quantifications due to various kinds of isomers. Here, we describe a novel method by using high-resolution parallel reaction monitoring (PRM) liquid chromatography-tandem mass spectrometry (LC-MS/MS). Both reversed-phase and normal-phase column were used in order to get accurate, reliable, widespread quantification of acylcarnitines, and without tedious sample preparation procedure. The method provided the most comprehensive acylcarnitine profile with high-resolution MS and MS/MS confirmation to date. A total of 117 acylcarnitines were detected from plasma and urine samples. The application of targeted profiling of acylcarnitines in db/m+ control and db/db diabetic mice indicated incomplete amino acid and fatty acid oxidation on diabetic mice. Interestingly, the reduction of medium odd-numbered chain acylcarnitines in urine samples was first observed between db/m+ and db/db mice. The high-resolution PRM method makes it possible to monitor the widespread metabolic changes of the acylcarnitines in response to stimuli. Besides, the accurate MS and MS/MS spectra data of the 117 acylcarnitines could be used as mass spectrometric resources for the identification of acylcarnitines.
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Affiliation(s)
- Li Xiang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Juntong Wei
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Xiao Yu Tian
- School of Biomedical Sciences, Chinese University of Hong Kong , Hong Kong 999077, P. R. China
| | - Bei Wang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Wan Chan
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Shangfu Li
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Zhi Tang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Hongsong Zhang
- School of Biomedical Sciences, Chinese University of Hong Kong , Hong Kong 999077, P. R. China
| | - Wai San Cheang
- School of Biomedical Sciences, Chinese University of Hong Kong , Hong Kong 999077, P. R. China
| | - Qian Zhao
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Hongzhi Zhao
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Zhiyi Yang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Yanjun Hong
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
| | - Yu Huang
- School of Biomedical Sciences, Chinese University of Hong Kong , Hong Kong 999077, P. R. China
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University , Hong Kong 999077, P. R. China
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25
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Calabuig-Navarro V, Haghiac M, Minium J, Glazebrook P, Ranasinghe GC, Hoppel C, Hauguel de-Mouzon S, Catalano P, O’Tierney-Ginn P. Effect of Maternal Obesity on Placental Lipid Metabolism. Endocrinology 2017; 158:2543-2555. [PMID: 28541534 PMCID: PMC5551552 DOI: 10.1210/en.2017-00152] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 05/17/2017] [Indexed: 02/06/2023]
Abstract
Obese women, on average, give birth to babies with high fat mass. Placental lipid metabolism alters fetal lipid delivery, potentially moderating neonatal adiposity, yet how it is affected by maternal obesity is poorly understood. We hypothesized that fatty acid (FA) accumulation (esterification) is higher and FA β-oxidation (FAO) is lower in placentas from obese, compared with lean women. We assessed acylcarnitine profiles (lipid oxidation intermediates) in mother-baby-placenta triads, in addition to lipid content, and messenger RNA (mRNA)/protein expression of key regulators of FA metabolism pathways in placentas of lean and obese women with normal glucose tolerance recruited at scheduled term Cesarean delivery. In isolated trophoblasts, we measured [3H]-palmitate metabolism. Placentas of obese women had 17.5% (95% confidence interval: 6.1, 28.7%) more lipid than placentas of lean women, and higher mRNA and protein expression of FA esterification regulators (e.g., peroxisome proliferator-activated receptor γ, acetyl-CoA carboxylase, steroyl-CoA desaturase 1, and diacylglycerol O-acyltransferase-1). [3H]-palmitate esterification rates were increased in trophoblasts from obese compared with lean women. Placentas of obese women had fewer mitochondria and a lower concentration of acylcarnitines, suggesting a decrease in mitochondrial FAO capacity. Conversely, peroxisomal FAO was greater in placentas of obese women. Altogether, these changes in placental lipid metabolism may serve to limit the amount of maternal lipid transferred to the fetus, restraining excess fetal adiposity in this population of glucose-tolerant women.
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Affiliation(s)
- Virtu Calabuig-Navarro
- Center for Reproductive Health, MetroHealth Medical Center, Cleveland, Ohio 44109
- Center for Reproductive Biology, Case Western Reserve University, Cleveland, Ohio 44106
| | - Maricela Haghiac
- Center for Reproductive Health, MetroHealth Medical Center, Cleveland, Ohio 44109
| | - Judi Minium
- Center for Reproductive Health, MetroHealth Medical Center, Cleveland, Ohio 44109
| | - Patricia Glazebrook
- Center for Reproductive Health, MetroHealth Medical Center, Cleveland, Ohio 44109
| | | | - Charles Hoppel
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106
| | | | - Patrick Catalano
- Center for Reproductive Health, MetroHealth Medical Center, Cleveland, Ohio 44109
- Center for Reproductive Biology, Case Western Reserve University, Cleveland, Ohio 44106
| | - Perrie O’Tierney-Ginn
- Center for Reproductive Health, MetroHealth Medical Center, Cleveland, Ohio 44109
- Center for Reproductive Biology, Case Western Reserve University, Cleveland, Ohio 44106
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Minkler PE, Stoll MSK, Ingalls ST, Hoppel CL. Selective and accurate C5 acylcarnitine quantitation by UHPLC-MS/MS: Distinguishing true isovaleric acidemia from pivalate derived interference. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1061-1062:128-133. [PMID: 28734160 DOI: 10.1016/j.jchromb.2017.07.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/22/2017] [Accepted: 07/09/2017] [Indexed: 10/19/2022]
Abstract
Tandem MS acylcarnitine "profiles" are extremely valuable. Although used appropriately in newborn screening programs to identify patients with possible diseases, their inadequate quantitative accuracy and lack of selectivity is problematic for confirmatory testing. In this report, we show the application of our validated, selective, accurate, precise, and robust UHPLC-MS/MS method for quantitation of acylcarnitines, specifically to C5 acylcarnitines: pivaloyl-, 2-methylbutyryl-, isovaleryl-, and valerylcarnitine. Standardized calibrants were used to generate 13-point, 200-fold concentration range calibration curves. Samples were isolated by solid-phase extraction and derivatized with pentafluorophenacyl trifluoromethanesulfonate. Acylcarnitine pentafluorophenacyl esters were eluted in 14min chromatograms. Data demonstrating quantitative stability and method robustness over a five year time period are shown and these results validate the method's accuracy and robustness. Urine from patients with isovaleric acidemia (with the disease marker isovalerylcarnitine) and with pivaloylcarnitine present are shown. These results demonstrate the method's ability to distinguish true isovaleric acidemia from pivalate derived interference. Our method for acylcarnitine quantitation is shown to be accurate, precise, and robust for selective quantitation of isovalerylcarnitine, and thus is recommended for confirmatory testing of suspected isovaleric acidemia patients.
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Affiliation(s)
- Paul E Minkler
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Maria S K Stoll
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Stephen T Ingalls
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Charles L Hoppel
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
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Minkler PE, Stoll MSK, Ingalls ST, Hoppel CL. Correcting false positive medium-chain acyl-CoA dehydrogenase deficiency results from newborn screening; synthesis, purification, and standardization of branched-chain C8 acylcarnitines for use in their selective and accurate absolute quantitation by UHPLC-MS/MS. Mol Genet Metab 2017; 120:363-369. [PMID: 28190699 DOI: 10.1016/j.ymgme.2017.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/18/2017] [Accepted: 02/06/2017] [Indexed: 11/21/2022]
Abstract
While selectively quantifying acylcarnitines in thousands of patient samples using UHPLC-MS/MS, we have occasionally observed unidentified branched-chain C8 acylcarnitines. Such observations are not possible using tandem MS methods, which generate pseudo-quantitative acylcarnitine "profiles". Since these "profiles" select for mass alone, they cannot distinguish authentic signal from isobaric and isomeric interferences. For example, some of the samples containing branched-chain C8 acylcarnitines were, in fact, expanded newborn screening false positive "profiles" for medium-chain acyl-CoA dehydrogenase deficiency (MCADD). Using our fast, highly selective, and quantitatively accurate UHPLC-MS/MS acylcarnitine determination method, we corrected the false positive tandem MS results and reported the sample results as normal for octanoylcarnitine (the marker for MCADD). From instances such as these, we decided to further investigate the presence of branched-chain C8 acylcarnitines in patient samples. To accomplish this, we synthesized and chromatographically characterized several branched-chain C8 acylcarnitines (in addition to valproylcarnitine): 2-methylheptanoylcarnitine, 6-methylheptanoylcarnitine, 2,2-dimethylhexanoylcarnitine, 3,3-dimethylhexanoylcarnitine, 3,5-dimethylhexanoylcarnitine, 2-ethylhexanoylcarnitine, and 2,4,4-trimethylpentanoylcarnitine. We then compared their behavior with branched-chain C8 acylcarnitines observed in patient samples and demonstrated our ability to chromographically resolve, and thus distinguish, octanoylcarnitine from branched-chain C8 acylcarnitines, correcting false positive MCADD results from expanded newborn screening.
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Affiliation(s)
- Paul E Minkler
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Maria S K Stoll
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Stephen T Ingalls
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Charles L Hoppel
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
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28
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Huang X, Bedoyan JK, Demirbas D, Harris DJ, Miron A, Edelheit S, Grahame G, DeBrosse SD, Wong LJ, Hoppel CL, Kerr DS, Anselm I, Berry GT. Succinyl-CoA synthetase (SUCLA2) deficiency in two siblings with impaired activity of other mitochondrial oxidative enzymes in skeletal muscle without mitochondrial DNA depletion. Mol Genet Metab 2017; 120:213-222. [PMID: 27913098 PMCID: PMC5346465 DOI: 10.1016/j.ymgme.2016.11.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 11/09/2016] [Accepted: 11/10/2016] [Indexed: 12/18/2022]
Abstract
Mutations in SUCLA2 result in succinyl-CoA ligase (ATP-forming) or succinyl-CoA synthetase (ADP-forming) (A-SCS) deficiency, a mitochondrial tricarboxylic acid cycle disorder. The phenotype associated with this gene defect is largely encephalomyopathy. We describe two siblings compound heterozygous for SUCLA2 mutations, c.985A>G (p.M329V) and c.920C>T (p.A307V), with parents confirmed as carriers of each mutation. We developed a new LC-MS/MS based enzyme assay to demonstrate the decreased SCS activity in the siblings with this unique genotype. Both siblings shared bilateral progressive hearing loss, encephalopathy, global developmental delay, generalized myopathy, and dystonia with choreoathetosis. Prior to diagnosis and because of lactic acidosis and low activity of muscle pyruvate dehydrogenase complex (PDC), sibling 1 (S1) was placed on dichloroacetate, while sibling 2 (S2) was on a ketogenic diet. S1 developed severe cyclic vomiting refractory to therapy, while S2 developed Leigh syndrome, severe GI dysmotility, intermittent anemia, hypogammaglobulinemia and eventually succumbed to his disorder. The mitochondrial DNA contents in skeletal muscle (SM) were normal in both siblings. Pyruvate dehydrogenase complex, ketoglutarate dehydrogenase complex, and several mitochondrial electron transport chain (ETC) activities were low or at the low end of the reference range in frozen SM from S1 and/or S2. In contrast, activities of PDC, other mitochondrial enzymes of pyruvate metabolism, ETC and, integrated oxidative phosphorylation, in skin fibroblasts were not significantly impaired. Although we show that propionyl-CoA inhibits PDC, it does not appear to account for decreased PDC activity in SM. A better understanding of the mechanisms of phenotypic variability and the etiology for tissue-specific secondary deficiencies of mitochondrial enzymes of oxidative metabolism, and independently mitochondrial DNA depletion (common in other cases of A-SCS deficiency), is needed given the implications for control of lactic acidosis and possible clinical management.
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Affiliation(s)
- Xiaoping Huang
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA, USA
| | - Jirair K Bedoyan
- Center for Human Genetics, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA; Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Didem Demirbas
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA, USA
| | - David J Harris
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Alexander Miron
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Simone Edelheit
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - George Grahame
- Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Suzanne D DeBrosse
- Center for Human Genetics, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA; Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Lee-Jun Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Charles L Hoppel
- Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA; Department of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Douglas S Kerr
- Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Irina Anselm
- Department of Neurology, Boston Children's Hospital, Boston, MA, USA
| | - Gerard T Berry
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
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Semba RD, Trehan I, Li X, Moaddel R, Ordiz MI, Maleta KM, Kraemer K, Shardell M, Ferrucci L, Manary M. Environmental Enteric Dysfunction is Associated with Carnitine Deficiency and Altered Fatty Acid Oxidation. EBioMedicine 2017; 17:57-66. [PMID: 28122695 PMCID: PMC5360565 DOI: 10.1016/j.ebiom.2017.01.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/03/2017] [Accepted: 01/17/2017] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Environmental enteric dysfunction (EED), a condition characterized by small intestine inflammation and abnormal gut permeability, is widespread in children in developing countries and a major cause of growth failure. The pathophysiology of EED remains poorly understood. METHODS We measured serum metabolites using liquid chromatography-tandem mass spectrometry in 400 children, aged 12-59months, from rural Malawi. Gut permeability was assessed by the dual-sugar absorption test. FINDINGS 80.7% of children had EED. Of 677 serum metabolites measured, 21 were negatively associated and 56 were positively associated with gut permeability, using a false discovery rate approach (q<0.05, p<0.0095). Increased gut permeability was associated with elevated acylcarnitines, deoxycarnitine, fatty acid β-oxidation intermediates, fatty acid ω-oxidation products, odd-chain fatty acids, trimethylamine-N-oxide, cystathionine, and homocitrulline, and with lower citrulline, ornithine, polyphenol metabolites, hippurate, tryptophan, and indolelactate. INTERPRETATION EED is a syndrome characterized by secondary carnitine deficiency, abnormal fatty acid oxidation, alterations in polyphenol and amino acid metabolites, and metabolic dysregulation of sulfur amino acids, tryptophan, and the urea cycle. Future studies are needed to corroborate the presence of secondary carnitine deficiency among children with EED and to understand how these metabolic derangements may negatively affect the growth and development of young children.
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Affiliation(s)
- Richard D Semba
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Indi Trehan
- Department of Pediatrics, Washington University at St. Louis, St. Louis, MO, USA
| | - Ximin Li
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ruin Moaddel
- National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - M Isabel Ordiz
- Department of Pediatrics, Washington University at St. Louis, St. Louis, MO, USA
| | | | - Klaus Kraemer
- Sight and Life, Basel, Switzerland; Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Michelle Shardell
- National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Luigi Ferrucci
- National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Mark Manary
- Department of Pediatrics, Washington University at St. Louis, St. Louis, MO, USA
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30
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Wang H, Xie S. Identification ofl-carnitine and its impurities in food supplement formulations by online column-switching liquid chromatography coupled with linear ion trap mass spectrometry. J Sep Sci 2016; 40:431-441. [DOI: 10.1002/jssc.201600652] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 10/09/2016] [Accepted: 11/03/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Hang Wang
- Instrumental Analysis Center; Shanghai Jiao Tong University; Shanghai P.R. China
| | - Sijun Xie
- Instrumental Analysis Center; Shanghai Jiao Tong University; Shanghai P.R. China
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31
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Zhang J, Light AR, Hoppel CL, Campbell C, Chandler CJ, Burnett DJ, Souza EC, Casazza GA, Hughen RW, Keim NL, Newman JW, Hunter GR, Fernandez JR, Garvey WT, Harper ME, Fiehn O, Adams SH. Acylcarnitines as markers of exercise-associated fuel partitioning, xenometabolism, and potential signals to muscle afferent neurons. Exp Physiol 2016; 102:48-69. [PMID: 27730694 DOI: 10.1113/ep086019] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Accepted: 10/07/2016] [Indexed: 01/18/2023]
Abstract
NEW FINDINGS What is the central question of this study? Does improved metabolic health and insulin sensitivity following a weight-loss and fitness intervention in sedentary, obese women alter exercise-associated fuel metabolism and incomplete mitochondrial fatty acid oxidation (FAO), as tracked by blood acylcarnitine patterns? What is the main finding and its importance? Despite improved fitness and blood sugar control, indices of incomplete mitochondrial FAO increased in a similar manner in response to a fixed load acute exercise bout; this indicates that intramitochondrial muscle FAO is inherently inefficient and is tethered directly to ATP turnover. With insulin resistance or type 2 diabetes mellitus, mismatches between mitochondrial fatty acid fuel delivery and oxidative phosphorylation/tricarboxylic acid cycle activity may contribute to inordinate accumulation of short- or medium-chain acylcarnitine fatty acid derivatives [markers of incomplete long-chain fatty acid oxidation (FAO)]. We reasoned that incomplete FAO in muscle would be ameliorated concurrent with improved insulin sensitivity and fitness following a ∼14 week training and weight-loss intervention in obese, sedentary, insulin-resistant women. Contrary to this hypothesis, overnight-fasted and exercise-induced plasma C4-C14 acylcarnitines did not differ between pre- and postintervention phases. These metabolites all increased robustly with exercise (∼45% of pre-intervention peak oxygen consumption) and decreased during a 20 min cool-down. This supports the idea that, regardless of insulin sensitivity and fitness, intramitochondrial muscle β-oxidation and attendant incomplete FAO are closely tethered to absolute ATP turnover rate. Acute exercise also led to branched-chain amino acid acylcarnitine derivative patterns suggestive of rapid and transient diminution of branched-chain amino acid flux through the mitochondrial branched-chain ketoacid dehydrogenase complex. We confirmed our prior novel observation that a weight-loss/fitness intervention alters plasma xenometabolites [i.e. cis-3,4-methylene-heptanoylcarnitine and γ-butyrobetaine (a co-metabolite possibly derived in part from gut bacteria)], suggesting that host metabolic health regulated gut microbe metabolism. Finally, we considered whether acylcarnitine metabolites signal to muscle-innervating afferents; palmitoylcarnitine at concentrations as low as 1-10 μm activated a subset (∼2.5-5%) of these neurons ex vivo. This supports the hypothesis that in addition to tracking exercise-associated shifts in fuel metabolism, muscle acylcarnitines act as signals of exertion to short-loop somatosensory-motor circuits or to the brain.
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Affiliation(s)
- Jie Zhang
- Anesthesiology Department, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Alan R Light
- Anesthesiology Department, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Charles L Hoppel
- Pharmacology Department, Case Western Reserve University, Cleveland, OH, USA
| | - Caitlin Campbell
- United States Department of Agriculture-Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, USA
| | - Carol J Chandler
- United States Department of Agriculture-Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, USA
| | - Dustin J Burnett
- United States Department of Agriculture-Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, USA
| | - Elaine C Souza
- United States Department of Agriculture-Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, USA
| | - Gretchen A Casazza
- Sports Medicine Program, School of Medicine, University of California, Davis, CA, USA
| | - Ronald W Hughen
- Anesthesiology Department, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Nancy L Keim
- United States Department of Agriculture-Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, USA.,Department of Nutrition, University of California, Davis, CA, USA
| | - John W Newman
- United States Department of Agriculture-Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, USA.,Department of Nutrition, University of California, Davis, CA, USA
| | - Gary R Hunter
- Department of Nutrition Sciences, University of Alabama, Birmingham, AL, USA.,Human Studies Department, University of Alabama, Birmingham, AL, USA
| | - Jose R Fernandez
- Department of Nutrition Sciences, University of Alabama, Birmingham, AL, USA
| | - W Timothy Garvey
- Department of Nutrition Sciences, University of Alabama, Birmingham, AL, USA
| | - Mary-Ellen Harper
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Oliver Fiehn
- Genome Center and West Coast Metabolomics Center, University of California, Davis, CA, USA.,Biochemistry Department, King Abdulaziz University, Jeddah, Saudi-Arabia
| | - Sean H Adams
- Arkansas Children's Nutrition Center, Little Rock, AR, USA.,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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Abstract
Although mass spectrometry has been used clinically for decades, the advent of immunoassay technology moved the clinical laboratory to more labor saving automated platforms requiring little if any sample preparation. It became clear, however, that immunoassays lacked sufficient sensitivity and specificity necessary for measurement of certain analytes or for measurement of analytes in specific patient populations. This limitation prompted clinical laboratories to revisit mass spectrometry which could additionally be used to develop assays for which there was no commercial source. In this chapter, the clinical applications of mass spectrometry in therapeutic drug monitoring, toxicology, and steroid hormone analysis will be reviewed. Technologic advances and new clinical applications will also be discussed.
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Affiliation(s)
- D French
- University of California San Francisco, San Francisco, CA, United States.
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33
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Development of solid phase extraction strategies to minimize the effect of human urine matrix effect on the response of carnitine by UPLC–MS/MS. Microchem J 2016. [DOI: 10.1016/j.microc.2016.07.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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34
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Schillaci LAP, Greene CL, Strovel E, Rispoli-Joines J, Spector E, Woontner M, Scharer G, Enns GM, Gallagher R, Zinn AB, McCandless SE, Hoppel CL, Goodman SI, Bedoyan JK. The M405V allele of the glutaryl-CoA dehydrogenase gene is an important marker for glutaric aciduria type I (GA-I) low excretors. Mol Genet Metab 2016; 119:50-6. [PMID: 27397597 DOI: 10.1016/j.ymgme.2016.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 06/28/2016] [Indexed: 11/28/2022]
Abstract
Glutaric aciduria type I (GA-I) is an autosomal recessive organic aciduria resulting from a functional deficiency of glutaryl-CoA dehydrogenase, encoded by GCDH. Two clinically indistinguishable diagnostic subgroups of GA-I are known; low and high excretors (LEs and HEs, respectively). Early medical and dietary interventions can result in significantly better outcomes and improved quality of life for patients with GA-I. We report on nine cases of GA-I LE patients all sharing the M405V allele with two cases missed by newborn screening (NBS) using tandem mass spectrometry (MS/MS). We describe a novel case with the known pathogenic M405V variant and a novel V133L variant, and present updated and previously unreported clinical, biochemical, functional and molecular data on eight other patients all sharing the M405V allele. Three of the nine patients are of African American ancestry, with two as siblings. GCDH activity was assayed in six of the nine patients and varied from 4 to 25% of the control mean. We support the use of urine glutarylcarnitine as a biochemical marker of GA-I by demonstrating that glutarylcarnitine is efficiently cleared by the kidney (50-90%) and that plasma and urine glutarylcarnitine follow a linear relationship. We report the allele frequencies for three known GA-I LE GCDH variants (M405V, V400M and R227P) and note that both the M405V and V400M variants are significantly more common in the population of African ancestry compared to the general population. This report highlights the M405V allele as another important molecular marker in patients with the GA-I LE phenotype. Therefore, the incorporation into newborn screening of molecular screening for the M405V and V400M variants in conjunction with MS/MS could help identify asymptomatic at-risk GA-I LE patients that could potentially be missed by current NBS programs.
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Affiliation(s)
- Lori-Anne P Schillaci
- Center for Human Genetics, University Hospitals Case Medical Center, Cleveland, OH, United States
| | - Carol L Greene
- Department of Pediatrics, University of Maryland, Baltimore, MD, United States
| | - Erin Strovel
- Department of Pediatrics, University of Maryland, Baltimore, MD, United States
| | | | - Elaine Spector
- Department of Pediatrics, University of Colorado School of Medicine, Denver, CO, United States
| | - Michael Woontner
- Department of Pediatrics, University of Colorado School of Medicine, Denver, CO, United States
| | - Gunter Scharer
- Department of Pediatrics, University of Colorado School of Medicine, Denver, CO, United States
| | - Gregory M Enns
- Department of Pediatrics, Division of Genetics, Stanford University School of Medicine, Stanford, CA, United States
| | - Renata Gallagher
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, United States
| | - Arthur B Zinn
- Center for Human Genetics, University Hospitals Case Medical Center, Cleveland, OH, United States; Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Case Medical Center, Cleveland, OH, United States
| | - Shawn E McCandless
- Center for Human Genetics, University Hospitals Case Medical Center, Cleveland, OH, United States; Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, United States; Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Case Medical Center, Cleveland, OH, United States
| | - Charles L Hoppel
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, United States; Department of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Stephen I Goodman
- Department of Pediatrics, University of Colorado School of Medicine, Denver, CO, United States
| | - Jirair K Bedoyan
- Center for Human Genetics, University Hospitals Case Medical Center, Cleveland, OH, United States; Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, United States; Center for Inherited Disorders of Energy Metabolism (CIDEM), University Hospitals Case Medical Center, Cleveland, OH, United States.
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35
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Aubert G, Martin OJ, Horton JL, Lai L, Vega RB, Leone TC, Koves T, Gardell SJ, Krüger M, Hoppel CL, Lewandowski ED, Crawford PA, Muoio DM, Kelly DP. The Failing Heart Relies on Ketone Bodies as a Fuel. Circulation 2016; 133:698-705. [PMID: 26819376 PMCID: PMC4766035 DOI: 10.1161/circulationaha.115.017355] [Citation(s) in RCA: 485] [Impact Index Per Article: 60.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 11/20/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND Significant evidence indicates that the failing heart is energy starved. During the development of heart failure, the capacity of the heart to utilize fatty acids, the chief fuel, is diminished. Identification of alternate pathways for myocardial fuel oxidation could unveil novel strategies to treat heart failure. METHODS AND RESULTS Quantitative mitochondrial proteomics was used to identify energy metabolic derangements that occur during the development of cardiac hypertrophy and heart failure in well-defined mouse models. As expected, the amounts of proteins involved in fatty acid utilization were downregulated in myocardial samples from the failing heart. Conversely, expression of β-hydroxybutyrate dehydrogenase 1, a key enzyme in the ketone oxidation pathway, was increased in the heart failure samples. Studies of relative oxidation in an isolated heart preparation using ex vivo nuclear magnetic resonance combined with targeted quantitative myocardial metabolomic profiling using mass spectrometry revealed that the hypertrophied and failing heart shifts to oxidizing ketone bodies as a fuel source in the context of reduced capacity to oxidize fatty acids. Distinct myocardial metabolomic signatures of ketone oxidation were identified. CONCLUSIONS These results indicate that the hypertrophied and failing heart shifts to ketone bodies as a significant fuel source for oxidative ATP production. Specific metabolite biosignatures of in vivo cardiac ketone utilization were identified. Future studies aimed at determining whether this fuel shift is adaptive or maladaptive could unveil new therapeutic strategies for heart failure.
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Affiliation(s)
- Gregory Aubert
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Ola J Martin
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Julie L Horton
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Ling Lai
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Rick B Vega
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Teresa C Leone
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Timothy Koves
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Stephen J Gardell
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Marcus Krüger
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Charles L Hoppel
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - E Douglas Lewandowski
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Peter A Crawford
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Deborah M Muoio
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.)
| | - Daniel P Kelly
- From Cardiovascular Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (G.A., O.J.M., J.L.H., L.L., R.B.V., T.C.L., S.J.G., P.A.C., D.P.K.); Departments of Medicine, Pharmacology, and Cancer Biology, Duke University, Durham, NC (T.K., D.M.M.); CECAD Research Center, Institute for Genetics, University of Cologne, Cologne, Germany (M.K.); Departments of Pharmacology and Medicine, Case Western Reserve University, Cleveland, OH (C.L.H.); College of Medicine, University of Illinois at Chicago, Chicago, IL (E.D.L.); and Department of Medicine, Washington University School of Medicine, St. Louis, MO (P.A.C.).
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36
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Minkler PE, Stoll MSK, Ingalls ST, Kerner J, Hoppel CL. Quantitative acylcarnitine determination by UHPLC-MS/MS--Going beyond tandem MS acylcarnitine "profiles". Mol Genet Metab 2015; 116:231-41. [PMID: 26458767 PMCID: PMC5009370 DOI: 10.1016/j.ymgme.2015.10.002] [Citation(s) in RCA: 27] [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: 07/30/2015] [Revised: 10/06/2015] [Accepted: 10/07/2015] [Indexed: 01/22/2023]
Abstract
Tandem MS "profiling" of acylcarnitines and amino acids was conceived as a first-tier screening method, and its application to expanded newborn screening has been enormously successful. However, unlike amino acid screening (which uses amino acid analysis as its second-tier validation of screening results), acylcarnitine "profiling" also assumed the role of second-tier validation, due to the lack of a generally accepted second-tier acylcarnitine determination method. In this report, we present results from the application of our validated UHPLC-MS/MS second-tier method for the quantification of total carnitine, free carnitine, butyrobetaine, and acylcarnitines to patient samples with known diagnoses: malonic acidemia, short-chain acyl-CoA dehydrogenase deficiency (SCADD) or isobutyryl-CoA dehydrogenase deficiency (IBD), 3-methyl-crotonyl carboxylase deficiency (3-MCC) or ß-ketothiolase deficiency (BKT), and methylmalonic acidemia (MMA). We demonstrate the assay's ability to separate constitutional isomers and diastereomeric acylcarnitines and generate values with a high level of accuracy and precision. These capabilities are unavailable when using tandem MS "profiles". We also show examples of research interest, where separation of acylcarnitine species and accurate and precise acylcarnitine quantification is necessary.
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MESH Headings
- Acetyl-CoA C-Acyltransferase/blood
- Acetyl-CoA C-Acyltransferase/cerebrospinal fluid
- Acetyl-CoA C-Acyltransferase/deficiency
- Acetyl-CoA C-Acyltransferase/urine
- Acyl-CoA Dehydrogenase/blood
- Acyl-CoA Dehydrogenase/cerebrospinal fluid
- Acyl-CoA Dehydrogenase/deficiency
- Acyl-CoA Dehydrogenase/urine
- Amino Acid Metabolism, Inborn Errors/blood
- Amino Acid Metabolism, Inborn Errors/cerebrospinal fluid
- Amino Acid Metabolism, Inborn Errors/diagnosis
- Amino Acid Metabolism, Inborn Errors/urine
- Betaine/analogs & derivatives
- Betaine/blood
- Betaine/cerebrospinal fluid
- Betaine/urine
- Carbon-Carbon Ligases/blood
- Carbon-Carbon Ligases/cerebrospinal fluid
- Carbon-Carbon Ligases/deficiency
- Carbon-Carbon Ligases/urine
- Carnitine/analogs & derivatives
- Carnitine/blood
- Carnitine/cerebrospinal fluid
- Carnitine/urine
- Chromatography, High Pressure Liquid/methods
- Chromatography, High Pressure Liquid/standards
- Female
- Humans
- Infant, Newborn
- Isomerism
- Lipid Metabolism, Inborn Errors/blood
- Lipid Metabolism, Inborn Errors/cerebrospinal fluid
- Lipid Metabolism, Inborn Errors/diagnosis
- Lipid Metabolism, Inborn Errors/urine
- Male
- Neonatal Screening
- Reproducibility of Results
- Sensitivity and Specificity
- Tandem Mass Spectrometry/standards
- Urea Cycle Disorders, Inborn/blood
- Urea Cycle Disorders, Inborn/cerebrospinal fluid
- Urea Cycle Disorders, Inborn/diagnosis
- Urea Cycle Disorders, Inborn/urine
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Affiliation(s)
- Paul E Minkler
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Maria S K Stoll
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Stephen T Ingalls
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Janos Kerner
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Charles L Hoppel
- Center for Mitochondrial Diseases, Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
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