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Piombarolo A, Ialongo C, Bizzarri M, Angeloni A. Systems Biology and Inborn Error of Metabolism: Analytical Strategy in Investigating Different Biochemical/Genetic Parameters. Methods Mol Biol 2024; 2745:191-210. [PMID: 38060187 DOI: 10.1007/978-1-0716-3577-3_12] [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: 12/08/2023]
Abstract
Inborn errors of metabolism (IEM) are a group of about 500 rare genetic diseases with large diversity and complexity due to number of metabolic pathways involved in. Establishing a correct diagnosis and identifying the specific clinical phenotype is consequently a difficult task. However, an inclusive diagnosis able in capturing the different clinical phenotypes is mandatory for successful treatment. However, in contrast with Garrod's basic assumption "one-gene one-disease," no "simple" correlation between genotype-phenotype can be vindicated in IEMs. An illustrative example of IEM is Phenylketonuria (PKU), an autosomal recessive inborn error of L-phenylalanine (Phe) metabolism, ascribed to variants of the phenylalanine hydroxylase (PAH) gene encoding for the enzyme complex phenylalanine-hydroxylase. Blood values of Phe allow classifying PKU into different clinical phenotypes, albeit the participation of other genetic/biochemical pathways in the pathogenetic mechanisms remains elusive. Indeed, it has been shown that the most serious complications, such as cognitive impairment, are not only related to the gene dysfunction but also to the patient's background and the participation of several nongenetic factors.Therefore, a Systems Biology-based strategy is required in addressing IEM complexity, and in identifying the interplay between different pathways in shaping the clinical phenotype. Such an approach should entail the concerted investigation of genomic, transcriptomics, proteomics, metabolomics profiles altogether with phenylalanine and amino acids metabolism. Noticeably, this "omic" perspective could be instrumental in planning personalized treatment, tailored accordingly to the disease profile and prognosis.
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Affiliation(s)
- Aurora Piombarolo
- Department of Experimental Medicine, Sapienza University, Rome, Italy
| | - Cristiano Ialongo
- Department of Experimental Medicine, Sapienza University, Rome, Italy
| | - Mariano Bizzarri
- Department of Experimental Medicine, Sapienza University, Rome, Italy
| | - Antonio Angeloni
- Department of Experimental Medicine, Sapienza University, Rome, Italy.
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Wurth R, Turgeon C, Stander Z, Oglesbee D. An evaluation of untargeted metabolomics methods to characterize inborn errors of metabolism. Mol Genet Metab 2024; 141:108115. [PMID: 38181458 PMCID: PMC10843816 DOI: 10.1016/j.ymgme.2023.108115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/19/2023] [Accepted: 12/12/2023] [Indexed: 01/07/2024]
Abstract
Inborn errors of metabolism (IEMs) encompass a diverse group of disorders that can be difficult to classify due to heterogenous clinical, molecular, and biochemical manifestations. Untargeted metabolomics platforms have become a popular approach to analyze IEM patient samples because of their ability to detect many metabolites at once, accelerating discovery of novel biomarkers, and metabolic mechanisms of disease. However, there are concerns about the reproducibility of untargeted metabolomics research due to the absence of uniform reporting practices, data analyses, and experimental design guidelines. Therefore, we critically evaluated published untargeted metabolomic platforms used to characterize IEMs to summarize the strengths and areas for improvement of this technology as it progresses towards the clinical laboratory. A total of 96 distinct IEMs were collectively evaluated by the included studies. However, most of these IEMs were evaluated by a single untargeted metabolomic method, in a single study, with a limited cohort size (55/96, 57%). The goals of the included studies generally fell into two, often overlapping, categories: detecting known biomarkers from many biochemically distinct IEMs using a single platform, and detecting novel metabolites or metabolic pathways. There was notable diversity in the design of the untargeted metabolomic platforms. Importantly, the majority of studies reported adherence to quality metrics, including the use of quality control samples and internal standards in their experiments, as well as confirmation of at least some of their feature annotations with commercial reference standards. Future applications of untargeted metabolomics platforms to the study of IEMs should move beyond single-subject analyses, and evaluate reproducibility using a prospective, or validation cohort.
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Affiliation(s)
- Rachel Wurth
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, 200 1(st) St SW, Rochester, MN 55905, USA
| | - Coleman Turgeon
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St SW, Rochester, MN 55905, USA
| | - Zinandré Stander
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St SW, Rochester, MN 55905, USA
| | - Devin Oglesbee
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St SW, Rochester, MN 55905, USA.
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Macioszek S, Dudzik D, Biesemans M, Wozniak A, Schöffski P, Markuszewski MJ. A multiplatform metabolomics approach for comprehensive analysis of GIST xenografts with various KIT mutations. Analyst 2023; 148:3883-3891. [PMID: 37458061 DOI: 10.1039/d3an00599b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Metabolites in biological matrices belong to diverse chemical groups, ranging from non-polar long-chain fatty acids to small polar molecules. The goal of untargeted metabolomic analysis is to measure the highest number of metabolites in the sample. Nevertheless, from an analytical point of view, no single technique can measure such a broad spectrum of analytes. Therefore, we selected a method based on GC-MS and LC-MS with two types of stationary phases for the untargeted profiling of gastrointestinal stromal tumours. The procedure was applied to GIST xenograft samples (n = 71) representing four different mutation models, half of which were treated with imatinib. We aimed to verify the method coverage and advantages of applying each technique. RP-LC-MS measured most metabolites due to a significant fraction of lipid components of the tumour tissue. What is unique and worth noting is that all applied techniques were able to distinguish between different mutation models. However, for detecting imatinib-induced alterations in the GIST metabolome, RP-LC-MS and GC-MS proved to be more relevant than HILIC-LC-MS, resulting in a higher number of significantly changed metabolites in four treated models. Undoubtedly, the inclusion of all mentioned techniques makes the method more comprehensive. Nonetheless, for green chemistry and time and labour saving, we assume that RP-LC-MS and GC-MS analyses are sufficient to cover the global GIST metabolome.
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Affiliation(s)
- Szymon Macioszek
- Department of Biopharmaceutics and Pharmacodynamics, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland.
| | - Danuta Dudzik
- Department of Biopharmaceutics and Pharmacodynamics, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland.
| | - Margot Biesemans
- Department of Biopharmaceutics and Pharmacodynamics, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland.
| | - Agnieszka Wozniak
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, and Department of General Medical Oncology, University Hospitals Leuven, Leuven Cancer Institute, Leuven, Belgium
| | - Patrick Schöffski
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, and Department of General Medical Oncology, University Hospitals Leuven, Leuven Cancer Institute, Leuven, Belgium
| | - Michal J Markuszewski
- Department of Biopharmaceutics and Pharmacodynamics, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland.
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Wang L, Gao J, Cao X, Du J, Cao L, Nie Z, Xu G, Dong Z. Integrated Analysis of Transcriptomics and Metabolomics Unveil the Novel Insight of One-Year-Old Precocious Mechanism in the Chinese Mitten Crab, Eriocheir sinensis. Int J Mol Sci 2023; 24:11171. [PMID: 37446357 DOI: 10.3390/ijms241311171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Eriocheir sinensis is traditionally a native high-value crab that is widely distributed in eastern Asia, and the precocity is considered the bottleneck problem affecting the development of the industry. The precocious E. sinensis is defined as a crab that reaches complete sexual maturation during the first year of its lifespan rather than as normally in the second year. However, the exact regulatory mechanisms underlying the precocity are still unclear to date. This study is the first to explore the mechanism of precocity with transcriptome-metabolome association analysis between the precocious and normal sexually mature E. sinensis. Our results indicated that the phenylalanine metabolism (map00360) and neuroactive ligand-receptor interaction (map04080) pathways play an important role in the precocity in the ovary of E. sinensis. In map00360, the predicted aromatic-L-amino-acid decarboxylase and 4-hydroxyphenylpyruvate dioxygenase isoform X1 genes and the phenethylamine, phenylethyl alcohol, trans-2-hydroxycinnamate, and L-tyrosine metabolites were all down-regulated in the ovary of the precocious E. sinensis. The map04080 was the common KEGG pathway in the ovary and hepatopancreas between the precocious and normal crab. In the ovary, the predicted growth hormone secretagogue receptor type 1 gene was up-regulated, and the L-glutamate metabolite was down-regulated in the precocious E. sinensis. In the hepatopancreas, the predicted forkhead box protein I2 gene and taurine metabolite were up-regulated and the the L-glutamate metabolite was down-regulated in the precocious crab. There was no common pathway in the testis. Numerous common pathways in the hepatopancreas between male precocious and normal crab were identified. The specific amino acids, fatty acids and flavorful nucleotide (inosine monophosphate (MP), cytidine MP, adenosine MP, uridine MP, and guanosine MP) contents in the hepatopancreas and gonads further confirmed the above omics results. Our results suggest that the phenylalanine metabolism may affect the ovarian development by changing the contents of the neurotransmitter and tyrosine. The neuroactive ligand-receptor interaction pathway may affect the growth by changing the expressions of related genes and affect the umami taste of the gonads and hepatopancreas through the differences of L-glutamate metabolite in the precocious E. sinensis. The results provided valuable and novel insights on the precocious mechanism and may have a significant impact on the development of the E. sinensis aquaculture industry.
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Affiliation(s)
- Lanmei Wang
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Jiancao Gao
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
| | - Xi Cao
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Jinliang Du
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Liping Cao
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Zhijuan Nie
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Gangchun Xu
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Zaijie Dong
- Key Laboratory of Freshwater, Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Centre of Chinese Academy of Fishery Sciences, Ministry of Agriculture and Rural Affairs, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
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Christopoulou I, Kostopoulou E, Matzarapi K, Chasapi SA, Spyroulias GA, Varvarigou A. Identification of Novel Biomarkers in Late Preterm Neonates with Respiratory Distress Syndrome (RDS) Using Urinary Metabolomic Analysis. Metabolites 2023; 13:metabo13050644. [PMID: 37233686 DOI: 10.3390/metabo13050644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 04/30/2023] [Accepted: 05/03/2023] [Indexed: 05/27/2023] Open
Abstract
Urine metabolomics is gaining traction as a means of identifying metabolic signatures associated with health and disease states. Thirty-one (31) late preterm (LP) neonates admitted to the neonatal intensive care unit (NICU) and 23 age-matched healthy LPs admitted to the maternity ward of a tertiary hospital were included in the study. Proton nuclear magnetic resonance (1H NMR) spectroscopy was employed for urine metabolomic analysis on the 1st and 3rd days of life of the neonates. The data were analyzed using univariate and multivariate statistical analysis. A unique metabolic pattern of enhanced metabolites was identified in the NICU-admitted LPs from the 1st day of life. Metabolic profiles were distinct in LPs presenting with respiratory distress syndrome (RDS). The discrepancies likely reflect differences in the gut microbiota, either due to variations in nutrient intake or as a result of medical interventions, such as the administration of antibiotics and other medications. Altered metabolites could potentially serve as biomarkers for identifying critically ill LP neonates or those at high risk for adverse outcomes later in life, including metabolic risks. The discovery of novel biomarkers may uncover potential targets for drug discovery and optimal periods for effective intervention, offering a personalized approach.
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Affiliation(s)
- Irene Christopoulou
- Department of Paediatrics, University of Patras Medical School, General University Hospital, 26500 Patras, Greece
| | - Eirini Kostopoulou
- Department of Paediatrics, University of Patras Medical School, General University Hospital, 26500 Patras, Greece
| | | | | | | | - Anastasia Varvarigou
- Department of Paediatrics, University of Patras Medical School, General University Hospital, 26500 Patras, Greece
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Moritz L, Klotz K, Grünert SC, Hannibal L, Spiekerkoetter U. Metabolic phenotyping in phenylketonuria reveals disease clustering independently of metabolic control. Mol Genet Metab 2023; 138:107509. [PMID: 36791482 DOI: 10.1016/j.ymgme.2023.107509] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 01/17/2023]
Abstract
Phenylketonuria (PKU, MIM #261600) is one of the most common inborn errors of metabolism (IEM) with an incidence of 1:10000 in the European population. PKU is caused by autosomal recessive mutations in phenylalanine hydroxylase (PAH) and manifests with elevation of phenylalanine (Phe) in plasma and urine. Untreated PKU manifests with intellectual disability including seizures, microcephaly and behavioral abnormalities. Early treatment and good compliance result in a normal intellectual outcome in many but not in all patients. This study examined plasma metabolites in patients with PKU (n = 27), hyperphenylalaninemia (HPA, n = 1) and healthy controls (n = 32) by LC- MS/MS. We hypothesized that PKU patients would exhibit a distinct "submetabolome" compared to that of healthy controls. We further hypothesized that the submetabolome of PKU patients with good metabolic control would resemble that of healthy controls. Results from this study show: (i) Distinct clustering of healthy controls and PKU patients based on polar metabolite profiling, (ii) Increased and decreased concentrations of metabolites within and afar from the Phe pathway in treated patients, and (iii) A specific PKU-submetabolome independently of metabolic control assessed by Phe in plasma. We examined the relationship between PKU metabolic control and extended metabolite profiles in plasma. The PKU submetabolome characterized in this study represents the combined effects of dietary adherence, adjustments in metabolic pathways to compensate for defective Phe processing, as well as metabolic derangements that could not be corrected with dietary management even in patients classified as having good metabolic control. New therapeutic targets may be uncovered to approximate the PKU submetabolome to that of healthy controls and prevent long-term organ damage.
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Affiliation(s)
- Lennart Moritz
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany; Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Katharina Klotz
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Sarah Catharina Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
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Ataabadi MS, Bahmanpour S, Yousefinejad S, Alaee S. Blood volatile organic compounds as potential biomarkers for poly cystic ovarian syndrome (PCOS): An animal study in the PCOS rat model. J Steroid Biochem Mol Biol 2023; 226:106215. [PMID: 36332782 DOI: 10.1016/j.jsbmb.2022.106215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 10/28/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022]
Abstract
Polycystic ovary syndrome (PCOS) as a common metabolic and endocrinological disorder can affect the metabolic profile in biological fluids. We studied the profile of blood volatile organic compounds (VOCs) in rats with PCOS and controls to identify potential specific biomarkers of blood VOCs in PCOS rats. For this purpose, 30 female adult Wistar rats were assigned to two groups: control and PCOS groups. PCOS model was induced using letrozole gavage (1 mg/kg) for 21 days. The rats in the control group received water of the same volume for 21 days. During treatment, a collection of vaginal smears was done every day for estrus cycle determination and weight was measured weekly. On the day after the last administration of letrozole, the rats were killed and their blood and ovaries were collected. Testosterone levels and histologic changes in ovaries were examined. Also, headspace-solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) analyzed the VOCs in the blood of PCOS and control rats. Multivariate and univariate statistical analyses were used to find the potential biomarkers for a rat model of PCOS. Weight gain, ovarian and vaginal pathological alteration, as well as hyperandrogenemia, confirmed the successful induction of the PCOS in rats. The results of blood VOCs analysis showed that nine VOCs were significantly elevated and one VOC decreased in the PCOS group than the control group (P < 0/05). The partial least-squares discriminant analysis (PLS-DA) and principal component analysis (PCA) showed good separation of VOCs between the PCOS rats and the control group. The 4-ethylphenol and capric (decanoic) acid were selected as the potential biomarkers for PCOS diagnosis in the blood of the PCOS rats. The blood of PCOS rats had a specific profile of VOCs, which could be detected by GC-MS analysis. These findings can pave the way for further studies towards developing a new screening method for PCOS detection and studying their pathology, based on VOCs analysis.
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Affiliation(s)
- Mahmoud Sadeghi Ataabadi
- Department of Reproductive Biology, School of Advanced Medical Sciences and Technologies, Shiraz Univcersity of Medical Sciences, Shiraz, Iran
| | - Soghra Bahmanpour
- Department of Anatomy, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeed Yousefinejad
- Research Center for Health Sciences, Institute of Health, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Sanaz Alaee
- Department of Reproductive Biology, School of Advanced Medical Sciences and Technologies, Shiraz Univcersity of Medical Sciences, Shiraz, Iran
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Barbe V, de Toro-Martín J, San-Cristobal R, Garneau V, Pilon G, Couture P, Roy D, Couillard C, Marette A, Vohl MC. A discriminant analysis of plasma metabolomics for the assessment of metabolic responsiveness to red raspberry consumption. Front Nutr 2023; 10:1104685. [PMID: 37125033 PMCID: PMC10130762 DOI: 10.3389/fnut.2023.1104685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/06/2023] [Indexed: 05/02/2023] Open
Abstract
Background Many studies show that the intake of raspberries is beneficial to immune-metabolic health, but the responses of individuals are heterogeneous and not fully understood. Methods In a two-arm parallel-group, randomized, controlled trial, immune-metabolic outcomes and plasma metabolite levels were analyzed before and after an 8-week red raspberry consumption. Based on partial least squares discriminant analysis (PLS-DA) on plasma xenobiotic levels, adherence to the intervention was first evaluated. A second PLS-DA followed by hierarchical clustering was used to classify individuals into response subgroups. Clinical immune and metabolic outcomes, including insulin resistance (HOMA-IR) and sensitivity (Matsuda, QUICKI) indices, during the intervention were assessed and compared between response subgroups. Results Two subgroups of participants, type 1 responders (n = 17) and type 2 responders (n = 5), were identified based on plasma metabolite levels measured during the intervention. Type 1 responders showed neutral to negative effects on immune-metabolic clinical parameters after raspberry consumption, and type 2 responders showed positive effects on the same parameters. Changes in waist circumference, waist-to-hip ratio, fasting plasma apolipoprotein B, C-reactive protein and insulin levels as well as Matsuda, HOMA-IR and QUICKI were significantly different between the two response subgroups. A deleterious effect of two carotenoid metabolites was also observed in type 1 responders but these variables were significantly associated with beneficial changes in the QUICKI index and in fasting insulin levels in type 2 responders. Increased 3-ureidopropionate levels were associated with a decrease in the Matsuda index in type 2 responders, suggesting that this metabolite is associated with a decrease in insulin sensitivity for those subjects, whereas the opposite was observed for type 1 responders. Conclusion The beneficial effects associated with red raspberry consumption are subject to inter-individual variability. Metabolomics-based clustering appears to be an effective way to assess adherence to a nutritional intervention and to classify individuals according to their immune-metabolic responsiveness to the intervention. This approach may be replicated in future studies to provide a better understanding of how interindividual variability impacts the effects of nutritional interventions on immune-metabolic health.
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Affiliation(s)
- Valentin Barbe
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- School of Nutrition, Université Laval, Québec City, QC, Canada
| | - Juan de Toro-Martín
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- School of Nutrition, Université Laval, Québec City, QC, Canada
| | - Rodrigo San-Cristobal
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- School of Nutrition, Université Laval, Québec City, QC, Canada
| | - Véronique Garneau
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- School of Nutrition, Université Laval, Québec City, QC, Canada
| | - Geneviève Pilon
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- Québec Heart and Lung Institute (IUCPQ) Research Center, Québec City, QC, Canada
| | - Patrick Couture
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Québec City, QC, Canada
| | - Denis Roy
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
| | - Charles Couillard
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- School of Nutrition, Université Laval, Québec City, QC, Canada
| | - André Marette
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- Québec Heart and Lung Institute (IUCPQ) Research Center, Québec City, QC, Canada
| | - Marie-Claude Vohl
- Centre Nutrition, santé et société (NUTRISS), Université Laval, Québec City, QC, Canada
- Institut sur la nutrition et les aliments fonctionnels (INAF), Université Laval, Québec City, QC, Canada
- School of Nutrition, Université Laval, Québec City, QC, Canada
- *Correspondence: Marie-Claude Vohl,
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9
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Dobrowolski SF, Phua YL, Vockley J, Goetzman E, Blair HC. Phenylketonuria oxidative stress and energy dysregulation: Emerging pathophysiological elements provide interventional opportunity. Mol Genet Metab 2022; 136:111-117. [PMID: 35379539 PMCID: PMC9832337 DOI: 10.1016/j.ymgme.2022.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 03/24/2022] [Accepted: 03/25/2022] [Indexed: 01/13/2023]
Abstract
Phenylalanine hydroxylase (PAH) deficient phenylketonuria (PKU) is rightfully considered the paradigm treatable metabolic disease. Dietary substrate restriction (i.e. phenylalanine (Phe) restriction) was applied >60 years ago and remains the primary PKU management means. The traditional model of PKU neuropathophysiology dictates blood Phe over-representation directs asymmetric blood:brain barrier amino acid transport through the LAT1 transporter with subsequent increased cerebral Phe concentration and low concentrations of tyrosine (Tyr), tryptophan (Trp), leucine (Leu), valine (Val), and isoleucine (Ile). Low Tyr and Trp concentrations generate secondary serotonergic and dopaminergic neurotransmitter paucities, widely attributed as drivers of PKU neurologic phenotypes. White matter disease, a central PKU characteristic, is ascribed to Phe-mediated tissue toxicity. Impaired cerebral protein synthesis, by reduced concentrations of non-Phe large neutral amino acids, is another cited pathological mechanism. The PKU amino acid transport model suggests Phe management should be more efficacious than is realized, as even early identified, continuously treated patients that retain therapy compliance into adulthood, demonstrate neurologic disease elements. Reduced cerebral metabolism was an early-recognized element of PKU pathology. Legacy data (late 1960's to mid-1970's) determined the Phe catabolite phenylpyruvate inhibits mitochondrial pyruvate transport. Respirometry of Pahenu2 cerebral mitochondria have attenuated respiratory chain complex 1 induction in response to pyruvate substrate, indicating reduced energy metabolism. Oxidative stress is intrinsic to PKU and Pahenu2 brain tissue presents increased reactive oxygen species. Phenylpyruvate inhibits glucose-6-phosphate dehydrogenase that generates reduced niacinamide adenine dinucleotide phosphate the obligatory cofactor of glutathione reductase. Pahenu2 brain tissue metabolomics identified increased oxidized glutathione and glutathione disulfide. Over-represented glutathione disulfide argues for reduced glutathione reductase activity secondary to reduced NADPH. Herein, we review evidence of energy and oxidative stress involvement in PKU pathology. Data suggests energy deficit and oxidative stress are features of PKU pathophysiology, providing intervention-amenable therapeutic targets to ameliorate disease elements refractory to standard of care.
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Affiliation(s)
- Steven F Dobrowolski
- Department of Pathology, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15224, United States of America.
| | - Yu Leng Phua
- Division of Medical Genetics, Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, United States of America
| | - Jerry Vockley
- Division of Medical Genetics, Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, United States of America
| | - Eric Goetzman
- Division of Medical Genetics, Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, United States of America
| | - Harry C Blair
- Department of Pathology, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15224, United States of America; Veteran's Affairs Medical Center, Pittsburgh, PA, United States of America
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10
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Gama MI, Pinto A, Daly A, Rocha JC, MacDonald A. The Impact of the Quality of Nutrition and Lifestyle in the Reproductive Years of Women with PKU on the Long-Term Health of Their Children. Nutrients 2022; 14:nu14051021. [PMID: 35267995 PMCID: PMC8912747 DOI: 10.3390/nu14051021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 11/29/2022] Open
Abstract
A woman’s nutritional status before and during pregnancy can affect the health of her progeny. Phenylketonuria (PKU), a rare disorder causing high blood and brain phenylalanine (Phe) concentrations, is associated with neurocognitive disability. Lifelong treatment is mainly dietetic with a Phe-restricted diet, supplemented with a low-Phe protein substitute. Treatment adherence commonly decreases in adolescence, with some adults ceasing dietary treatment. In maternal PKU, elevated blood Phe is harmful to the fetus so a strict Phe-restricted diet must be re-established preconception, and this is particularly difficult to achieve. A woman’s reproductive years introduces an opportunity to adopt healthier behaviours to prepare for successful pregnancies and positive health outcomes for both themselves and their children. Several factors can influence the health status of women with PKU. Political, socioeconomic, and individual food and lifestyle choices affect diet quality, metabolic control, and epigenetics, which then pre-condition the overall maternal health and long-term health of the child. Here, we reflect on a comprehensive approach to treatment and introduce practical recommendations to optimize the wellbeing of women with PKU and the resultant health of their children.
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Affiliation(s)
- Maria Inês Gama
- Nutrition & Metabolism, NOVA Medical School, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo dos Mártires da Pátria 130, 1169-056 Lisboa, Portugal; (M.I.G.); (J.C.R.)
| | - Alex Pinto
- Birmingham Women’s and Children’s Hospital, Birmingham B4 6NH, UK; (A.P.); (A.D.)
| | - Anne Daly
- Birmingham Women’s and Children’s Hospital, Birmingham B4 6NH, UK; (A.P.); (A.D.)
| | - Júlio César Rocha
- Nutrition & Metabolism, NOVA Medical School, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo dos Mártires da Pátria 130, 1169-056 Lisboa, Portugal; (M.I.G.); (J.C.R.)
- Reference Centre of Inherited Metabolic Diseases, Centro Hospitalar Universitário de Lisboa Central, 1169-045 Lisboa, Portugal
- CINTESIS—Center for Health Technology and Services Research, NOVA Medical School, Campo dos Mártires da Pátria 130, 1169-056 Lisboa, Portugal
| | - Anita MacDonald
- Birmingham Women’s and Children’s Hospital, Birmingham B4 6NH, UK; (A.P.); (A.D.)
- Correspondence:
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11
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Schoen MS, Singh RH. Plasma metabolomic profile changes in females with phenylketonuria following a camp intervention. Am J Clin Nutr 2022; 115:811-821. [PMID: 34864852 PMCID: PMC8895208 DOI: 10.1093/ajcn/nqab400] [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: 04/17/2021] [Accepted: 11/29/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND There remains a limited understanding of the metabolic perturbations, beyond phenylalanine (Phe) metabolism, that contribute to phenotypic variability in phenylketonuria (PKU). OBJECTIVES This study aimed to characterize changes in the PKU plasma metabolome following a 5-d metabolic camp intervention and to compare PKU profiles with those of matched healthy controls. METHODS In 28 females (aged 12-57 y), fasting plasma samples were collected on the first (day 1) and final (day 5) days of camp to measure metabolic control and to complete untargeted metabolomic profiling. Three-day dietary records were collected to assess changes in dietary adherence and composition. Univariate (Wilcoxon signed-rank and Mann-Whitney U test) and multivariate (random forest, hierarchical clustering) analyses were performed to identify clinical and metabolic features that were associated with the intervention and disease state. RESULTS Relative to healthy controls, Phe catabolites, ketones, and carnitine- and glycine-conjugated fatty acids were elevated in females with PKU at baseline, whereas fatty acylcholine metabolites were substantially lower. After the camp intervention, plasma Phe concentrations decreased [median change: -173 µmol/L (IQR: -325, -28 µmol/L)] and 70% of PKU participants demonstrated improved dietary adherence by decreasing Phe intake and/or increasing medical food consumption. This was accompanied by a shift in abundance for 223 metabolites (q < 0.05). Compounds associated with the metabolism of Phe, fatty acids, and choline contributed most to profile differences between camp days 1 and 5. CONCLUSIONS In females with PKU, untargeted metabolomics identified prominent perturbations in amino acid and lipid metabolites associated with bioenergetic impairment and oxidative stress. Choline-conjugated lipids could have fundamental roles in these pathways and they have not been previously evaluated in PKU. A short-term camp intervention was effective for improving or fully normalizing the abundance of the identified discriminatory metabolites.
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Affiliation(s)
| | - Rani H Singh
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
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12
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He B, Zhang W, Guled F, Harms A, Ramautar R, Hankemeier T. Analytical techniques for biomass-restricted metabolomics: An overview of the state-of-the-art. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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13
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Helena H, Ivona V, Roman Ř, František F. Current applications of capillary electrophoresis-mass spectrometry for the analysis of biologically important analytes in urine (2017 to mid-2021): A review. J Sep Sci 2021; 45:305-324. [PMID: 34538010 PMCID: PMC9292318 DOI: 10.1002/jssc.202100621] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 12/17/2022]
Abstract
Capillary electrophoresis coupled online with mass detection is a modern tool for analyzing wide ranges of compounds in complex samples, including urine. Capillary electrophoresis with mass spectrometry allows the separation and identification of various analytes spanning from small ions to high molecular weight protein complexes. Similarly to the much more common liquid chromatography‐mass spectrometry techniques, the capillary electrophoresis separation reduces the complexity of the mixture of analytes entering the mass spectrometer resulting in reduced ion suppression and a more straightforward interpretation of the mass spectrometry data. This review summarizes capillary electrophoresis with mass spectrometry studies published between the years 2017 and 2021, aiming at the determination of various compounds excreted in urine. The properties of the urine, including its diagnostical and analytical features and chemical composition, are also discussed including general protocols for the urine sample preparation. The mechanism of the electrophoretic separation and the instrumentation for capillary electrophoresis with mass spectrometry coupling is also included. This review shows the potential of the capillary electrophoresis with mass spectrometry technique for the analyses of different kinds of analytes in a complex biological matrix. The discussed applications are divided into two main groups (capillary electrophoresis with mass spectrometry for the determination of drugs and drugs of abuse in urine and capillary electrophoresis with mass spectrometry for the studies of urinary metabolome).
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Affiliation(s)
- Hrušková Helena
- Institute of Analytical Chemistry, Czech Academy of Sciences, Brno, Czech Republic.,Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Voráčová Ivona
- Institute of Analytical Chemistry, Czech Academy of Sciences, Brno, Czech Republic
| | - Řemínek Roman
- Institute of Analytical Chemistry, Czech Academy of Sciences, Brno, Czech Republic
| | - Foret František
- Institute of Analytical Chemistry, Czech Academy of Sciences, Brno, Czech Republic
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14
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LeVatte M, Keshteli AH, Zarei P, Wishart DS. Applications of Metabolomics to Precision Nutrition. Lifestyle Genom 2021; 15:1-9. [PMID: 34518463 DOI: 10.1159/000518489] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 07/07/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND For thousands of years, disabilities due to nutrient deficiencies have plagued humanity. Rickets, scurvy, anemia, stunted growth, blindness, and mental handicaps due to nutrient deficiencies affected up to 1/10 of the world's population prior to 1900. The discovery of essential amino acids, vitamins, and minerals, in the early 1900s, led to a fundamental change in our understanding of food and a revolution in human health. Widespread vitamin and mineral supplementation, the development of recommended dietary allowances, and the implementation of food labeling and testing along with significant improvements in food production and food quality have meant that nutrient-related disorders have almost vanished in the developed world. The success of nutritional science in preventing disease at a population-wide level is one of the great scientific triumphs of the 20th century. The challenge for nutritional science in the 21st century is to understand how to use nutrients and other food constituents to enhance human health or prevent disease at a more personal level. This is the primary goal of precision nutrition. SUMMARY Precision nutrition is an emerging branch of nutrition science that aims to use modern omics technologies (genomics, proteomics, and metabolomics) to assess an individual's response to specific foods or dietary patterns and thereby determine the most effective diet or lifestyle interventions to prevent or treat specific diseases in that individual. Metabolomics is vital to nearly every aspect of precision nutrition. It can be used to comprehensively characterize the thousands of chemicals in foods, to identify food byproducts in human biofluids or tissues, to characterize nutrient deficiencies or excesses, to monitor biochemical responses to dietary interventions, to track long-term or short-term dietary habits, and to guide the development of nutritional therapies. In this review, we will describe how metabolomics has been used to advance the field of precision nutrition by providing some notable examples or use cases. First, we will describe how metabolomics helped launch the field of precision nutrition through the diagnosis and dietary therapy of individuals with inborn errors of metabolism. Next, we will describe how metabolomics is being used to comprehensively characterize the full chemical complexity of many key foods, and how this is revealing much more about nutrients than ever imagined. Third, we will describe how metabolomics is being used to identify food consumption biomarkers and how this opens the door to a more objective and quantitative assessments of an individual's diet and their response to certain foods. Finally, we will describe how metabolomics is being coupled with other omics technologies to develop custom diets and lifestyle interventions that are leading to positive health benefits. Key Message: Metabolomics is vital to the advancement of nutritional science and in making the dream of precision nutrition a reality.
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Affiliation(s)
- Marcia LeVatte
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | | | - Parvin Zarei
- Department of Bioinformatics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - David S Wishart
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.,Department of Computing Sciences, University of Alberta, Edmonton, Alberta, Canada.,Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada.,Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
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15
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Valdés A, Álvarez-Rivera G, Socas-Rodríguez B, Herrero M, Cifuentes A. Capillary electromigration methods for food analysis and Foodomics: Advances and applications in the period February 2019-February 2021. Electrophoresis 2021; 43:37-56. [PMID: 34473359 DOI: 10.1002/elps.202100201] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/17/2021] [Accepted: 08/30/2021] [Indexed: 12/11/2022]
Abstract
This work presents a revision of the main applications of capillary electromigration methods in food analysis and Foodomics. Articles that were published during the period February 2019-February 2021 are included. The work shows the multiple CE methods that have been developed and applied to analyze different types of molecules in foods. Namely, CE methods have been applied to analyze amino acids, biogenic amines, carbohydrates, chiral compounds, contaminants, DNAs, food additives, heterocyclic amines, lipids, secondary metabolites, peptides, pesticides, phenols, pigments, polyphenols, proteins, residues, toxins, vitamins, small organic and inorganic compounds, as well as other minor compounds. The last results on the use of CE for monitoring food interactions and food processing, including recent microchips developments and new applications of CE in Foodomics, are discussed too. The new procedures of CE to investigate food quality and safety, nutritional value, storage and bioactivity are also included in the present review work.
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16
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Shanmuganathan M, Sarfaraz MO, Kroezen Z, Philbrick H, Poon R, Don-Wauchope A, Puglia M, Wishart D, Britz-McKibbin P. A Cross-Platform Metabolomics Comparison Identifies Serum Metabolite Signatures of Liver Fibrosis Progression in Chronic Hepatitis C Patients. Front Mol Biosci 2021; 8:676349. [PMID: 34414211 PMCID: PMC8370474 DOI: 10.3389/fmolb.2021.676349] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 07/19/2021] [Indexed: 12/15/2022] Open
Abstract
Metabolomics offers new insights into disease mechanisms that is enhanced when adopting orthogonal instrumental platforms to expand metabolome coverage, while also reducing false discoveries by independent replication. Herein, we report the first inter-method comparison when using multisegment injection-capillary electrophoresis-mass spectrometry (MSI-CE-MS) and nuclear magnetic resonance (NMR) spectroscopy for characterizing the serum metabolome of patients with liver fibrosis in chronic hepatitis C virus (HCV) infection (n = 20) and non-HCV controls (n = 14). In this study, 60 and 30 serum metabolites were detected frequently (>75%) with good technical precision (median CV < 10%) from serum filtrate samples (n = 34) when using standardized protocols for MSI-CE-MS and NMR, respectively. Also, 20 serum metabolite concentrations were consistently measured by both methods over a 500-fold concentration range with an overall mean bias of 9.5% (n = 660). Multivariate and univariate statistical analyses independently confirmed that serum choline and histidine were consistently elevated (p < 0.05) in HCV patients with late-stage (F2-F4) as compared to early-stage (F0-F1) liver fibrosis. Overall, the ratio of serum choline to uric acid provided optimal differentiation of liver disease severity (AUC = 0.848, p = 0.00766) using a receiver operating characteristic curve, which was positively correlated with liver stiffness measurements by ultrasound imaging (r = 0.606, p = 0.0047). Moreover, serum 5-oxo-proline concentrations were higher in HCV patients as compared to non-HCV controls (F = 4.29, p = 0.0240) after adjustment for covariates (age, sex, BMI), indicative of elevated oxidative stress from glutathione depletion with the onset and progression of liver fibrosis. Both instrumental techniques enable rapid yet reliable quantification of serum metabolites in large-scale metabolomic studies with good overlap for biomarker replication. Advantages of MSI-CE-MS include greater metabolome coverage, lower operating costs, and smaller sample volume requirements, whereas NMR offers a robust platform supported by automated spectral and data processing software.
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Affiliation(s)
- Meera Shanmuganathan
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
| | | | - Zachary Kroezen
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
| | - Holly Philbrick
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
| | - Richel Poon
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
| | - Andrew Don-Wauchope
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Marco Puglia
- Department of Medicine, Division of Gastroenterology, McMaster University, Hamilton, ON, Canada
| | - David Wishart
- Departments of Biological Sciences and Computing Science, University of Alberta, Edmonton, AB, Canada
| | - Philip Britz-McKibbin
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
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17
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Urine Phenylacetylglutamine Determination in Patients with Hyperphenylalaninemia. J Clin Med 2021; 10:jcm10163674. [PMID: 34441968 PMCID: PMC8396897 DOI: 10.3390/jcm10163674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/10/2021] [Accepted: 08/16/2021] [Indexed: 12/11/2022] Open
Abstract
Phenylketonuria (PKU), an autosomal-recessive inborn error of phenylalanine (Phe) metabolism is the most prevalent disorder of amino acid metabolism. Currently, clinical follow-up relies on frequent monitoring of Phe levels in blood. We hypothesize that the urine level of phenylacetylglutamine (PAG), a phenyl-group marker, could be used as a non-invasive biomarker. In this cross-sectional study, a validated liquid chromatography coupled to tandem mass spectrometry (LC-MS) method was used for urinary PAG quantification in 35 participants with hyperphenylalaninemia (HPA) and 33 age- and sex-matched healthy controls. We have found that (a) PKU patients present higher urine PAG levels than healthy control subjects, and that (b) there is a significant correlation between urine PAG and circulating Phe levels in patients with HPA. In addition, we show a significant strong correlation between Phe levels from venous blood samples and from capillary finger-prick dried blood spot (DBS) samples collected at the same time in patients with HPA. Further research in order to assess the potential role of urine PAG as a non-invasive biomarker in PKU is warranted.
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18
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Liu P, Yang Q, Yu N, Cao Y, Wang X, Wang Z, Qiu WY, Ma C. Phenylalanine Metabolism is Dysregulated in Human Hippocampus with Alzheimer's Disease Related Pathological Changes. J Alzheimers Dis 2021; 83:609-622. [PMID: 34334403 DOI: 10.3233/jad-210461] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Alzheimer's disease (AD) is one of the most challenging diseases causing an increasing burden worldwide. Although the neuropathologic diagnosis of AD has been established for many years, the metabolic changes in neuropathologic diagnosed AD samples have not been fully investigated. OBJECTIVE To elucidate the potential metabolism dysregulation in the postmortem human brain samples assessed by AD related pathological examination. METHODS We performed untargeted and targeted metabolomics in 44 postmortem human brain tissues. The metabolic differences in the hippocampus between AD group and control (NC) group were compared. RESULTS The results show that a pervasive metabolic dysregulation including phenylalanine metabolism, valine, leucine, and isoleucine biosynthesis, biotin metabolism, and purine metabolism are associated with AD pathology. Targeted metabolomics reveal that phenylalanine, phenylpyruvic acid, and N-acetyl-L-phenylalanine are upregulated in AD samples. In addition, the enzyme IL-4I1 catalyzing transformation from phenylalanine to phenylpyruvic acid is also upregulated in AD samples. CONCLUSION There is a pervasive metabolic dysregulation in hippocampus with AD-related pathological changes. Our study suggests that the dysregulation of phenylalanine metabolism in hippocampus may be an important pathogenesis for AD pathology formation.
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Affiliation(s)
- Pan Liu
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Qian Yang
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Ning Yu
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Yan Cao
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Xue Wang
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Zhao Wang
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Wen-Ying Qiu
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Chao Ma
- Institute of Basic Medical Sciences, Neuroscience Center, National Human Brain Bank for Development and Function, Chinese Academy of Medical Sciences; Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Peking Union Medical College, Beijing, China.,Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, China
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19
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Charbonneau MR, Denney WS, Horvath NG, Cantarella P, Castillo MJ, Puurunen MK, Brennan AM. Development of a mechanistic model to predict synthetic biotic activity in healthy volunteers and patients with phenylketonuria. Commun Biol 2021; 4:898. [PMID: 34294862 PMCID: PMC8298439 DOI: 10.1038/s42003-021-02183-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 04/30/2021] [Indexed: 11/09/2022] Open
Abstract
The development of therapeutics depends on predictions of clinical activity from pre-clinical data. We have previously described SYNB1618, an engineered bacterial therapeutic (synthetic biotic) for the treatment of Phenylketonuria (PKU), a rare genetic disease that leads to accumulation of plasma phenylalanine (Phe) and severe neurological complications. SYNB1618 consumes Phe in preclinical models, healthy human volunteers, and PKU patients. However, it remains unclear to what extent Phe consumption by SYNB1618 in the gastrointestinal tract lowers plasma Phe levels in PKU patients. Here, we construct a mechanistic model that predicts SYNB1618 function in non-human primates and healthy subjects by combining in vitro simulations and prior knowledge of human physiology. In addition, we extend a model of plasma Phe kinetics in PKU patients, in order to estimate plasma Phe lowering by SYNB1618. This approach provides a framework that can be used more broadly to define the therapeutic potential of synthetic biotics.
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20
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Igarashi K, Ota S, Kaneko M, Hirayama A, Enomoto M, Katumata K, Sugimoto M, Soga T. High-throughput screening of salivary polyamine markers for discrimination of colorectal cancer by multisegment injection capillary electrophoresis tandem mass spectrometry. J Chromatogr A 2021; 1652:462355. [PMID: 34233246 DOI: 10.1016/j.chroma.2021.462355] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/03/2021] [Accepted: 06/15/2021] [Indexed: 01/05/2023]
Abstract
Polyamine metabolites provide pathophysiological information on disease or therapeutic efficacy, yet rapid screening methods for these biomarkers are lacking. Here, we developed high-throughput polyamine metabolite profiling based on multisegment injection capillary electrophoresis triple quadrupole tandem mass spectrometry (MSI-CE-MS/MS), which allows sequential 40-sample injection followed by electrophoretic separation and specific mass detection. To achieve consecutive analysis of polyamine samples, 1 M formic acid was used as the background electrolyte (BGE). The BGE spacer volume had an apparent effect on peak resolution among samples, and 20 nL was selected as the optimal volume. The use of polyamine isotopomers as the internal standard enabled the correction of matrix effects in MS detection. This method is sensitive, selective and quantitative, and its utility was demonstrated by screening polyamines in 359 salivary samples within 360 min, resulting in discrimination of colorectal cancer patients from noncancer controls.
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Affiliation(s)
- Kaori Igarashi
- Institute for Advanced Biosciences, Keio University, 246-2 Mizukami, Kakuganji, Tsuruoka 997-0052, Japan.
| | - Sana Ota
- Institute for Advanced Biosciences, Keio University, 246-2 Mizukami, Kakuganji, Tsuruoka 997-0052, Japan.
| | - Miku Kaneko
- Institute for Advanced Biosciences, Keio University, 246-2 Mizukami, Kakuganji, Tsuruoka 997-0052, Japan.
| | - Akiyoshi Hirayama
- Institute for Advanced Biosciences, Keio University, 246-2 Mizukami, Kakuganji, Tsuruoka 997-0052, Japan.
| | - Masanobu Enomoto
- Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, 6-7-1, Nishijinjuku, Shinjuku, Tokyo 160-0023, Japan.
| | - Kenji Katumata
- Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, 6-7-1, Nishijinjuku, Shinjuku, Tokyo 160-0023, Japan.
| | - Masahiro Sugimoto
- Institute for Advanced Biosciences, Keio University, 246-2 Mizukami, Kakuganji, Tsuruoka 997-0052, Japan; Research and Development Center for Minimally Invasive Therapies, Medical Research Institute, Tokyo Medical University, 6-1-1, Sinjuku, Tokyo 160-0022, Japan.
| | - Tomoyoshi Soga
- Institute for Advanced Biosciences, Keio University, 246-2 Mizukami, Kakuganji, Tsuruoka 997-0052, Japan; Faculty of Environmental Information Studies, Keio University, 5322 Endo, Fujisawa 252-0882, Japan.
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21
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Sillner N, Walker A, Lucio M, Maier TV, Bazanella M, Rychlik M, Haller D, Schmitt-Kopplin P. Longitudinal Profiles of Dietary and Microbial Metabolites in Formula- and Breastfed Infants. Front Mol Biosci 2021; 8:660456. [PMID: 34124150 PMCID: PMC8195334 DOI: 10.3389/fmolb.2021.660456] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/13/2021] [Indexed: 01/02/2023] Open
Abstract
The early-life metabolome of the intestinal tract is dynamically influenced by colonization of gut microbiota which in turn is affected by nutrition, i.e. breast milk or formula. A detailed examination of fecal metabolites was performed to investigate the effect of probiotics in formula compared to control formula and breast milk within the first months of life in healthy neonates. A broad metabolomics approach was conceptualized to describe fecal polar and semi-polar metabolites affected by feeding type within the first year of life. Fecal metabolomes were clearly distinct between formula- and breastfed infants, mainly originating from diet and microbial metabolism. Unsaturated fatty acids and human milk oligosaccharides were increased in breastfed, whereas Maillard products were found in feces of formula-fed children. Altered microbial metabolism was represented by bile acids and aromatic amino acid metabolites. Elevated levels of sulfated bile acids were detected in stool samples of breastfed infants, whereas secondary bile acids were increased in formula-fed infants. Microbial co-metabolism was supported by significant correlation between chenodeoxycholic or lithocholic acid and members of Clostridia. Fecal metabolites showed strong inter- and intra-individual behavior with features uniquely present in certain infants and at specific time points. Nevertheless, metabolite profiles converged at the end of the first year, coinciding with solid food introduction.
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Affiliation(s)
- Nina Sillner
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Neuherberg, Germany.,ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - Alesia Walker
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Neuherberg, Germany
| | - Marianna Lucio
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Neuherberg, Germany
| | - Tanja V Maier
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Neuherberg, Germany
| | - Monika Bazanella
- Chair of Nutrition and Immunology, Technical University of Munich, Freising, Germany
| | - Michael Rychlik
- Chair of Analytical Food Chemistry, Technical University of Munich, Freising, Germany
| | - Dirk Haller
- ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany.,Chair of Nutrition and Immunology, Technical University of Munich, Freising, Germany
| | - Philippe Schmitt-Kopplin
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Neuherberg, Germany.,ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany.,Chair of Analytical Food Chemistry, Technical University of Munich, Freising, Germany
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22
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Shanmuganathan M, Kroezen Z, Gill B, Azab S, de Souza RJ, Teo KK, Atkinson S, Subbarao P, Desai D, Anand SS, Britz-McKibbin P. The maternal serum metabolome by multisegment injection-capillary electrophoresis-mass spectrometry: a high-throughput platform and standardized data workflow for large-scale epidemiological studies. Nat Protoc 2021; 16:1966-1994. [PMID: 33674789 DOI: 10.1038/s41596-020-00475-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 11/24/2020] [Indexed: 01/31/2023]
Abstract
A standardized data workflow is described for large-scale serum metabolomic studies using multisegment injection-capillary electrophoresis-mass spectrometry. Multiplexed separations increase throughput (<4 min/sample) for quantitative determination of 66 polar/ionic metabolites in serum filtrates consistently detected (coefficient of variance (CV) <30%) with high frequency (>75%) from a multi-ethnic cohort of pregnant women (n = 1,004). We outline a validated protocol implemented in four batches over a 7-month period that includes details on preventive maintenance, sample workup, data preprocessing and metabolite authentication. We achieve stringent quality control (QC) and robust batch correction of long-term signal drift with good mutual agreement for a wide range of metabolites, including serum glucose as compared to a clinical chemistry analyzer (mean bias = 11%, n = 668). Control charts for a recovery standard (mean CV = 12%, n = 2,412) and serum metabolites in QC samples (median CV = 13%, n = 202) demonstrate acceptable intermediate precision with a median intraclass coefficient of 0.87. We also report reference intervals for 53 serum metabolites from a diverse population of women in their second trimester of pregnancy.
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Affiliation(s)
- Meera Shanmuganathan
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada
| | - Zachary Kroezen
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada
| | - Biban Gill
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada
| | - Sandi Azab
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada
| | - Russell J de Souza
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada.,Population Health Research Institute, Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - Koon K Teo
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Stephanie Atkinson
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Padmaja Subbarao
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
| | - Dipika Desai
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Sonia S Anand
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada.,Population Health Research Institute, Hamilton Health Sciences, Hamilton, Ontario, Canada.,Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Philip Britz-McKibbin
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada.
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23
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Zhang W, Ramautar R. CE-MS for metabolomics: Developments and applications in the period 2018-2020. Electrophoresis 2021; 42:381-401. [PMID: 32906195 PMCID: PMC7891659 DOI: 10.1002/elps.202000203] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/30/2020] [Accepted: 09/01/2020] [Indexed: 02/06/2023]
Abstract
Capillary electrophoresis-mass spectrometry (CE-MS) is now a mature analytical technique in metabolomics, notably for the efficient profiling of polar and charged metabolites. Over the past few years, (further) progress has been made in the design of improved interfacing techniques for coupling CE to MS; also, in the development of CE-MS approaches for profiling metabolites in volume-restricted samples, and in strategies that further enhance the metabolic coverage. In this article, which is a follow-up of a previous review article covering the years 2016-2018 (Electrophoresis 2019, 40, 165-179), the main (technological) developments in CE-MS methods and strategies for metabolomics are discussed covering the literature from July 2018 to June 2020. Representative examples highlight the utility of CE-MS in the fields of biomedical, clinical, microbial, plant and food metabolomics. A complete overview of recent CE-MS-based metabolomics studies is given in a table, which provides information on sample type and pretreatment, capillary coatings, and MS detection mode. Finally, some general conclusions and perspectives are given.
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Affiliation(s)
- Wei Zhang
- Biomedical Microscale Analytics, Leiden Academic Centre for Drug ResearchLeiden UniversityLeidenThe Netherlands
| | - Rawi Ramautar
- Biomedical Microscale Analytics, Leiden Academic Centre for Drug ResearchLeiden UniversityLeidenThe Netherlands
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24
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Drouin N, van Mever M, Zhang W, Tobolkina E, Ferre S, Servais AC, Gou MJ, Nyssen L, Fillet M, Lageveen-Kammeijer GS, Nouta J, Chetwynd AJ, Lynch I, Thorn JA, Meixner J, Lößner C, Taverna M, Liu S, Tran NT, Francois Y, Lechner A, Nehmé R, Al Hamoui Dit Banni G, Nasreddine R, Colas C, Lindner HH, Faserl K, Neusüß C, Nelke M, Lämmerer S, Perrin C, Bich-Muracciole C, Barbas C, Gonzálvez Á, Guttman A, Szigeti M, Britz-McKibbin P, Kroezen Z, Shanmuganathan M, Nemes P, Portero EP, Hankemeier T, Codesido S, González-Ruiz V, Rudaz S, Ramautar R. Capillary Electrophoresis-Mass Spectrometry at Trial by Metabo-Ring: Effective Electrophoretic Mobility for Reproducible and Robust Compound Annotation. Anal Chem 2020; 92:14103-14112. [PMID: 32961048 PMCID: PMC7581015 DOI: 10.1021/acs.analchem.0c03129] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/22/2020] [Indexed: 12/15/2022]
Abstract
Capillary zone electrophoresis-mass spectrometry (CE-MS) is a mature analytical tool for the efficient profiling of (highly) polar and ionizable compounds. However, the use of CE-MS in comparison to other separation techniques remains underrepresented in metabolomics, as this analytical approach is still perceived as technically challenging and less reproducible, notably for migration time. The latter is key for a reliable comparison of metabolic profiles and for unknown biomarker identification that is complementary to high resolution MS/MS. In this work, we present the results of a Metabo-ring trial involving 16 CE-MS platforms among 13 different laboratories spanning two continents. The goal was to assess the reproducibility and identification capability of CE-MS by employing effective electrophoretic mobility (μeff) as the key parameter in comparison to the relative migration time (RMT) approach. For this purpose, a representative cationic metabolite mixture in water, pretreated human plasma, and urine samples spiked with the same metabolite mixture were used and distributed for analysis by all laboratories. The μeff was determined for all metabolites spiked into each sample. The background electrolyte (BGE) was prepared and employed by each participating lab following the same protocol. All other parameters (capillary, interface, injection volume, voltage ramp, temperature, capillary conditioning, and rinsing procedure, etc.) were left to the discretion of the contributing laboratories. The results revealed that the reproducibility of the μeff for 20 out of the 21 model compounds was below 3.1% vs 10.9% for RMT, regardless of the huge heterogeneity in experimental conditions and platforms across the 13 laboratories. Overall, this Metabo-ring trial demonstrated that CE-MS is a viable and reproducible approach for metabolomics.
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Affiliation(s)
- Nicolas Drouin
- Division
of Systems Biomedicine and Pharmacology, Leiden Academic Centre for
Drug Research, Leiden University, 2311 G Leiden, The Netherlands
| | - Marlien van Mever
- Division
of Systems Biomedicine and Pharmacology, Leiden Academic Centre for
Drug Research, Leiden University, 2311 G Leiden, The Netherlands
| | - Wei Zhang
- Division
of Systems Biomedicine and Pharmacology, Leiden Academic Centre for
Drug Research, Leiden University, 2311 G Leiden, The Netherlands
| | - Elena Tobolkina
- School
of Pharmaceutical Sciences, University of
Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Institute
of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
| | - Sabrina Ferre
- School
of Pharmaceutical Sciences, University of
Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Institute
of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
| | - Anne-Catherine Servais
- Laboratory
for the Analysis of Medicines, Center for Interdisciplinary Research
on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, B-4000 Liège, Belgium
| | - Marie-Jia Gou
- Laboratory
for the Analysis of Medicines, Center for Interdisciplinary Research
on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, B-4000 Liège, Belgium
| | - Laurent Nyssen
- Laboratory
for the Analysis of Medicines, Center for Interdisciplinary Research
on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, B-4000 Liège, Belgium
- Department
of Clinical Chemistry, Center for Interdisciplinary Research on Medicines
(CIRM), University of Liège, Avenue Hippocrate 15, B-4000 Liège, Belgium
| | - Marianne Fillet
- Laboratory
for the Analysis of Medicines, Center for Interdisciplinary Research
on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, B-4000 Liège, Belgium
| | | | - Jan Nouta
- Leiden University
Medical Center, Center for Proteomics
and Metabolomics, 2300 RC Leiden, The Netherlands
| | - Andrew J. Chetwynd
- School
of Geography Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Iseult Lynch
- School
of Geography Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - James A. Thorn
- AB
Sciex UK Ltd, Phoenix House, Lakeside Drive, Warrington, Cheshire WA1 1RX, U.K.
| | - Jens Meixner
- Agilent
Technologies R&D and Marketing GmbH & Co. KG, Hewlett-Packard-Straße 8, 76337 Waldbronn, Germany
| | | | - Myriam Taverna
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
- Institut Universitaire de France, 1 Rue Descartes, 75231 CEDEX 05 Paris, France
| | - Sylvie Liu
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - N. Thuy Tran
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Yannis Francois
- Laboratoire
de Spectromètrie de Masse des Interactions et des Systémes
(LSMIS) UMR 7140 (Unistra-CNRS), Université
de Strasbourg, 4 Rue Blaise Pascal, 67081 CEDEX Strasbourg, France
| | - Antony Lechner
- Laboratoire
de Spectromètrie de Masse des Interactions et des Systémes
(LSMIS) UMR 7140 (Unistra-CNRS), Université
de Strasbourg, 4 Rue Blaise Pascal, 67081 CEDEX Strasbourg, France
| | - Reine Nehmé
- Institut
de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d’Orléans, 45067 Orléans, France
| | - Ghassan Al Hamoui Dit Banni
- Institut
de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d’Orléans, 45067 Orléans, France
| | - Rouba Nasreddine
- Institut
de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d’Orléans, 45067 Orléans, France
| | - Cyril Colas
- Institut
de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d’Orléans, 45067 Orléans, France
- Centre de Biophysique Moléculaire,
CNRS-Université
d’Orléans, UPR 4311, 45071 CEDEX 2 Orléans, France
| | - Herbert H. Lindner
- Institute
of Clinical Biochemistry, Innsbruck Medical
University, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Klaus Faserl
- Institute
of Clinical Biochemistry, Innsbruck Medical
University, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Christian Neusüß
- Faculty
of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany
| | - Manuel Nelke
- Faculty
of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany
| | - Stefan Lämmerer
- Faculty
of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany
| | - Catherine Perrin
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247-CNRS-UM-ENSCM, Université de Montpellier, 34093 CEDEX 5 Montpellier, France
| | - Claudia Bich-Muracciole
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247-CNRS-UM-ENSCM, Université de Montpellier, 34093 CEDEX 5 Montpellier, France
| | - Coral Barbas
- Centre
for Metabolomics and Bioanalysis (CEMBIO), Department of Chemistry
and Biochemistry, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización
Montepríncipe, Boadilladel
Monte 28660, Madrid, Spain
| | - Ángeles
López Gonzálvez
- Centre
for Metabolomics and Bioanalysis (CEMBIO), Department of Chemistry
and Biochemistry, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización
Montepríncipe, Boadilladel
Monte 28660, Madrid, Spain
| | - Andras Guttman
- Horváth
Csaba Memorial Laboratory of Bioseparation Sciences, Research Center
for Molecular Medicine, Faculty of Medicine, Doctoral School of Molecular
Medicine, University of Debrecen, 98 Nagyerdei Road, H-4032 Debrecen, Hungary
- Translation
Glycomics Group, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, 10 Egyetem Street, Veszprem H-8200, Hungary
- Sciex, 250 South Kraemer Boulevard, Brea, California 92821, United States
| | - Marton Szigeti
- Horváth
Csaba Memorial Laboratory of Bioseparation Sciences, Research Center
for Molecular Medicine, Faculty of Medicine, Doctoral School of Molecular
Medicine, University of Debrecen, 98 Nagyerdei Road, H-4032 Debrecen, Hungary
- Translation
Glycomics Group, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, 10 Egyetem Street, Veszprem H-8200, Hungary
| | - Philip Britz-McKibbin
- Department
of Chemistry and Chemical Biology, McMaster
University, 1280 Main St. W., Hamilton, Ontario L8S 4M1, Canada
| | - Zachary Kroezen
- Department
of Chemistry and Chemical Biology, McMaster
University, 1280 Main St. W., Hamilton, Ontario L8S 4M1, Canada
| | - Meera Shanmuganathan
- Department
of Chemistry and Chemical Biology, McMaster
University, 1280 Main St. W., Hamilton, Ontario L8S 4M1, Canada
| | - Peter Nemes
- Department
of Chemistry & Biochemistry, University
of Maryland, College
Park, Maryland 20742, United States
| | - Erika P. Portero
- Department
of Chemistry & Biochemistry, University
of Maryland, College
Park, Maryland 20742, United States
| | - Thomas Hankemeier
- Division
of Systems Biomedicine and Pharmacology, Leiden Academic Centre for
Drug Research, Leiden University, 2311 G Leiden, The Netherlands
| | - Santiago Codesido
- School
of Pharmaceutical Sciences, University of
Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Institute
of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
| | - Víctor González-Ruiz
- School
of Pharmaceutical Sciences, University of
Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Institute
of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Swiss Centre for Applied Human Toxicology
(SCAHT), Missionsstrasse
64, 4055 Bâle, Switzerland
| | - Serge Rudaz
- School
of Pharmaceutical Sciences, University of
Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Institute
of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Rue Michel Servet 1, 1211 4 Geneva, Switzerland
- Swiss Centre for Applied Human Toxicology
(SCAHT), Missionsstrasse
64, 4055 Bâle, Switzerland
| | - Rawi Ramautar
- Division
of Systems Biomedicine and Pharmacology, Leiden Academic Centre for
Drug Research, Leiden University, 2311 G Leiden, The Netherlands
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25
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de Souza RJ, Shanmuganathan M, Lamri A, Atkinson SA, Becker A, Desai D, Gupta M, Mandhane PJ, Moraes TJ, Morrison KM, Subbarao P, Teo KK, Turvey SE, Williams NC, Britz-McKibbin P, Anand SS. Maternal Diet and the Serum Metabolome in Pregnancy: Robust Dietary Biomarkers Generalizable to a Multiethnic Birth Cohort. Curr Dev Nutr 2020; 4:nzaa144. [PMID: 33073162 PMCID: PMC7547851 DOI: 10.1093/cdn/nzaa144] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/15/2020] [Accepted: 08/27/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Advances in metabolomics are anticipated to decipher associations between dietary exposures and health. Replication biomarker studies in different populations are critical to demonstrate generalizability. OBJECTIVES To identify and validate robust serum metabolites associated with diet quality and specific foods in a multiethnic cohort of pregnant women. DESIGN In this cross-sectional analysis of 3 multiethnic Canadian birth cohorts, we collected semiquantitative FFQ and serum data from 900 women at the second trimester of pregnancy. We calculated a diet quality score (DQS), defined as daily servings of "healthy" minus "unhealthy" foods. Serum metabolomics was performed by multisegment injection-capillary electrophoresis-mass spectrometry, and specific serum metabolites associated with maternal DQSs were identified. We combined the results across all 3 cohorts using meta-analysis to classify robust dietary biomarkers (r > ± 0.1; P < 0.05). RESULTS Diet quality was higher in the South Asian birth cohort (mean DQS = 7.1) than the 2 white Caucasian birth cohorts (mean DQS <3.2). Sixty-six metabolites were detected with high frequency (>75%) and adequate precision (CV <30%), and 47 were common to all cohorts. Hippuric acid was positively associated with healthy diet score in all cohorts, and with the overall DQS only in the primarily white Caucasian cohorts. We observed robust correlations between: 1) proline betaine-citrus foods; 2) 3-methylhistidine-red meat, chicken, and eggs; 3) hippuric acid-fruits and vegetables; 4) trimethylamine N-oxide (TMAO)-seafood, meat, and eggs; and 5) tryptophan betaine-nuts/legumes. CONCLUSIONS Specific serum metabolites reflect intake of citrus fruit/juice, vegetables, animal foods, and nuts/legumes in pregnant women independent of ethnicity, fasting status, and delays to storage across multiple collection centers. Robust biomarkers of overall diet quality varied by cohort. Proline betaine, 3-methylhistidine, hippuric acid, TMAO, and tryptophan betaine were robust dietary biomarkers for investigations of maternal nutrition in diverse populations.
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Affiliation(s)
- Russell J de Souza
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
| | - Meera Shanmuganathan
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
| | - Amel Lamri
- Population Health Research Institute, Hamilton, ON, Canada
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Allan Becker
- Children's Hospital Research Institute, University of Manitoba, Winnipeg, MB, Canada
| | - Dipika Desai
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
| | - Milan Gupta
- Department of Medicine, McMaster University, Hamilton, ON, Canada
- Canadian Collaborative Research Network, Brampton, ON, Canada
| | - Piush J Mandhane
- Department of Pediatrics, University of Alberta, Edmonton, AB, Canada
| | | | - Katherine M Morrison
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
- Department of Pediatrics, McMaster University, Hamilton, ON, Canada
| | - Padmaja Subbarao
- Hospital for Sick Children, Toronto, ON, Canada
- University of Toronto, Toronto, ON, Canada
| | - Koon K Teo
- Population Health Research Institute, Hamilton, ON, Canada
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Stuart E Turvey
- BC Children's Hospital and The University of British Columbia, Vancouver, BC, Canada
| | | | - Philip Britz-McKibbin
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, ON, Canada
| | - Sonia S Anand
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
- Department of Medicine, McMaster University, Hamilton, ON, Canada
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26
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van der Goot E, van Spronsen FJ, Falcão Salles J, van der Zee EA. A Microbial Community Ecology Perspective on the Gut-Microbiome-Brain Axis. Front Endocrinol (Lausanne) 2020; 11:611. [PMID: 32982988 PMCID: PMC7492586 DOI: 10.3389/fendo.2020.00611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/27/2020] [Indexed: 12/12/2022] Open
Affiliation(s)
- Els van der Goot
- Molecular Neurobiology, Groningen Institute for Evolutionary Sciences, University of Groningen, Groningen, Netherlands
- Microbial Ecology Cluster, Groningen Institute for Evolutionary Sciences, University of Groningen, Groningen, Netherlands
| | - Francjan J. van Spronsen
- Department of Pediatrics, Beatrix Children's Hospital, University Medical Center Groningen, Groningen, Netherlands
| | - Joana Falcão Salles
- Microbial Ecology Cluster, Groningen Institute for Evolutionary Sciences, University of Groningen, Groningen, Netherlands
| | - Eddy A. van der Zee
- Molecular Neurobiology, Groningen Institute for Evolutionary Sciences, University of Groningen, Groningen, Netherlands
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27
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Serum Metabolic Signatures of Chronic Limb-Threatening Ischemia in Patients with Peripheral Artery Disease. J Clin Med 2020; 9:jcm9061877. [PMID: 32560175 PMCID: PMC7355749 DOI: 10.3390/jcm9061877] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/30/2020] [Accepted: 06/10/2020] [Indexed: 12/11/2022] Open
Abstract
Peripheral artery disease (PAD) is characterized by the atherosclerotic narrowing of lower limb vessels, leading to ischemic muscle pain in older persons. Some patients experience progression to advanced chronic limb-threatening ischemia (CLTI) with poor long-term survivorship. Herein, we performed serum metabolomics to reveal the mechanisms of PAD pathophysiology that may improve its diagnosis and prognosis to CLTI complementary to the ankle-brachial index (ABI) and clinical presentations. Non-targeted metabolite profiling of serum was performed by multisegment injection-capillary electrophoresis-mass spectrometry (MSI-CE-MS) from age and sex-matched, non-diabetic, PAD participants who were recruited and clinically stratified based on the Rutherford classification into CLTI (n = 18) and intermittent claudication (IC, n = 20). Compared to the non-PAD controls (n = 20), PAD patients had lower serum concentrations of creatine, histidine, lysine, oxoproline, monomethylarginine, as well as higher circulating phenylacetylglutamine (p < 0.05). Importantly, CLTI cases exhibited higher serum concentrations of carnitine, creatinine, cystine and trimethylamine-N-oxide along with lower circulating fatty acids relative to well matched IC patients. Most serum metabolites associated with PAD progression were also correlated with ABI (r = ±0.24-0.59, p < 0.05), whereas the ratio of stearic acid to carnitine, and arginine to propionylcarnitine differentiated CLTI from IC with good accuracy (AUC = 0.87, p = 4.0 × 10-5). This work provides new biochemical insights into PAD progression for the early detection and surveillance of high-risk patients who may require peripheral vascular intervention to prevent amputation and premature death.
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28
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Piestansky J, Galba J, Kovacech B, Parrak V, Kovac A, Mikuš P. Capillary electrophoresis and ultra‐high‐performance liquid chromatography methods in clinical monitoring of creatinine in human urine: A comparative study. Biomed Chromatogr 2020; 34:e4907. [DOI: 10.1002/bmc.4907] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Juraj Piestansky
- Department of Pharmaceutical Analysis and Nuclear Pharmacy Comenius University in Bratislava Bratislava Slovak Republic
- Toxicological and Antidoping Center Comenius University in Bratislava Bratislava Slovak Republic
| | - Jaroslav Galba
- Department of Pharmaceutical Analysis and Nuclear Pharmacy Comenius University in Bratislava Bratislava Slovak Republic
- AXON Neuroscience R&D Bratislava Slovak Republic
| | - Branislav Kovacech
- AXON Neuroscience R&D Bratislava Slovak Republic
- Institute of Neuroimmunology, Slovak Academy of Science Bratislava Slovak Republic
| | - Vojtech Parrak
- AXON Neuroscience R&D Bratislava Slovak Republic
- Institute of Neuroimmunology, Slovak Academy of Science Bratislava Slovak Republic
| | - Andrej Kovac
- AXON Neuroscience R&D Bratislava Slovak Republic
- Institute of Neuroimmunology, Slovak Academy of Science Bratislava Slovak Republic
| | - Peter Mikuš
- Department of Pharmaceutical Analysis and Nuclear Pharmacy Comenius University in Bratislava Bratislava Slovak Republic
- Toxicological and Antidoping Center Comenius University in Bratislava Bratislava Slovak Republic
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29
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Manier SK, Wagmann L, Flockerzi V, Meyer MR. Toxicometabolomics of the new psychoactive substances α-PBP and α-PEP studied in HepaRG cell incubates by means of untargeted metabolomics revealed unexpected amino acid adducts. Arch Toxicol 2020; 94:2047-2059. [PMID: 32313995 PMCID: PMC7303098 DOI: 10.1007/s00204-020-02742-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 04/06/2020] [Indexed: 01/06/2023]
Abstract
Toxicometabolomics, essentially applying metabolomics to toxicology of endogenous compounds such as drugs of abuse or new psychoactive substances (NPS), can be investigated by using different in vitro models and dedicated metabolomics techniques to enhance the number of relevant findings. The present study aimed to study the toxicometabolomics of the two NPS α-pyrrolidinobutiophenone (1-phenyl-2-(pyrrolidin-1-yl)butan-1-one, α-PBP) and α-pyrrolidinoheptaphenone (1-phenyl-2-(pyrrolidin-1-yl)heptan-1-one, α-PEP, PV8) in HepaRG cell line incubates. Evaluation was performed using reversed-phase and normal-phase liquid chromatography coupled with high-resolution mass spectrometry in positive and negative ionization mode, respectively, to analyze cells and cell media. Statistical evaluation was performed using one-way ANOVA, principal component discriminant function analysis, as well as hierarchical clustering. In general, the analysis of cells did not mainly reveal any features, but the parent compounds of the drugs of abuse. For α-PBP an increase in N-methylnicotinamide was found, which may indicate hepatotoxic potential of the substance. After analysis of cell media, significant features led to the identification of several metabolites of both compounds. Amino acid adducts with glycine and alanine were found, and these have not been described in any study before and are likely to appear in vivo. Additionally, significant changes in the metabolism of cholesterol were revealed after incubation with α-PEP. In summary, the application of metabolomics techniques after HepaRG cells exposure to NPS did not lead to an increased number of identified drug metabolites compared to previously published studies, but gave a wider perspective on the physiological effect of the investigated compounds on human liver cells.
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Affiliation(s)
- Sascha K Manier
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Center for Molecular Signaling (PZMS), Saarland University, 66421, Homburg, Germany
| | - Lea Wagmann
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Center for Molecular Signaling (PZMS), Saarland University, 66421, Homburg, Germany
| | - Veit Flockerzi
- Department of Experimental and Clinical Pharmacology, Institute of Experimental and Clinical Pharmacology and Toxicology, Center for Molecular Signaling (PZMS), Saarland University, 66421, Homburg, Germany
| | - Markus R Meyer
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Center for Molecular Signaling (PZMS), Saarland University, 66421, Homburg, Germany.
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Mordaunt D, Cox D, Fuller M. Metabolomics to Improve the Diagnostic Efficiency of Inborn Errors of Metabolism. Int J Mol Sci 2020; 21:ijms21041195. [PMID: 32054038 PMCID: PMC7072749 DOI: 10.3390/ijms21041195] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/08/2020] [Accepted: 02/09/2020] [Indexed: 12/21/2022] Open
Abstract
Early diagnosis of inborn errors of metabolism (IEM)—a large group of congenital disorders—is critical, given that many respond well to targeted therapy. Newborn screening programs successfully capture a proportion of patients enabling early recognition and prompt initiation of therapy. For others, the heterogeneity in clinical presentation often confuses diagnosis with more common conditions. In the absence of family history and following clinical suspicion, the laboratory diagnosis typically begins with broad screening tests to circumscribe specialised metabolite and/or enzyme assays to identify the specific IEM. Confirmation of the biochemical diagnosis is usually achieved by identifying pathogenic genetic variants that will also enable cascade testing for family members. Unsurprisingly, this diagnostic trajectory is too often a protracted and lengthy process resulting in delays in diagnosis and, importantly, therapeutic intervention for these rare conditions is also postponed. Implementation of mass spectrometry technologies coupled with the expanding field of metabolomics is changing the landscape of diagnosing IEM as numerous metabolites, as well as enzymes, can now be measured collectively on a single mass spectrometry-based platform. As the biochemical consequences of impaired metabolism continue to be elucidated, the measurement of secondary metabolites common across groups of IEM will facilitate algorithms to further increase the efficiency of diagnosis.
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Affiliation(s)
- Dylan Mordaunt
- Genetics and Molecular Pathology, SA Pathology at Women’s and Children’s Hospital, 72 King William Road, North Adelaide, SA 5006, Australia; (D.M.); (D.C.)
- School of Medicine, University of Adelaide, Adelaide, SA 5000, Australia
| | - David Cox
- Genetics and Molecular Pathology, SA Pathology at Women’s and Children’s Hospital, 72 King William Road, North Adelaide, SA 5006, Australia; (D.M.); (D.C.)
| | - Maria Fuller
- Genetics and Molecular Pathology, SA Pathology at Women’s and Children’s Hospital, 72 King William Road, North Adelaide, SA 5006, Australia; (D.M.); (D.C.)
- School of Medicine, University of Adelaide, Adelaide, SA 5000, Australia
- Correspondence: ; Tel.: +61-8-8161-6741
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Huang Z, Scotland KB, Li Y, Guo J, McGeer PL, Lange D, Chen DDY. Application of multisegment injection on quantification of creatinine and standard addition analysis of urinary 5‐hydroxyindoleacetic acid simultaneously with creatinine normalization. Electrophoresis 2020; 41:183-193. [DOI: 10.1002/elps.201900456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 12/07/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Zi‐Ao Huang
- Department of ChemistryUniversity of British Columbia Vancouver British Columbia Canada
| | - Kymora B. Scotland
- Department of Urologic Sciences, The Stone Centre at Vancouver General HospitalUniversity of British Columbia Vancouver British Columbia Canada
| | - Yueyang Li
- Department of ChemistryUniversity of British Columbia Vancouver British Columbia Canada
| | - Jian‐Ping Guo
- Aurin Biotech Inc. Vancouver British Columbia Canada
| | | | - Dirk Lange
- Department of Urologic Sciences, The Stone Centre at Vancouver General HospitalUniversity of British Columbia Vancouver British Columbia Canada
| | - David D. Y. Chen
- Department of ChemistryUniversity of British Columbia Vancouver British Columbia Canada
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