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Huening KA, Groves JT, Wildenthal JA, Tabita FR, North JA. Escherichia coli possessing the dihydroxyacetone phosphate shunt utilize 5'-deoxynucleosides for growth. Microbiol Spectr 2024; 12:e0308623. [PMID: 38441472 PMCID: PMC10986504 DOI: 10.1128/spectrum.03086-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 02/17/2024] [Indexed: 03/08/2024] Open
Abstract
All organisms utilize S-adenosyl-l-methionine (SAM) as a key co-substrate for the methylation of biological molecules, the synthesis of polyamines, and radical SAM reactions. When these processes occur, 5'-deoxy-nucleosides are formed as byproducts such as S-adenosyl-l-homocysteine, 5'-methylthioadenosine (MTA), and 5'-deoxyadenosine (5dAdo). A prevalent pathway found in bacteria for the metabolism of MTA and 5dAdo is the dihydroxyacetone phosphate (DHAP) shunt, which converts these compounds into dihydroxyacetone phosphate and 2-methylthioacetaldehyde or acetaldehyde, respectively. Previous work in other organisms has shown that the DHAP shunt can enable methionine synthesis from MTA or serve as an MTA and 5dAdo detoxification pathway. Rather, the DHAP shunt in Escherichia coli ATCC 25922, when introduced into E. coli K-12, enables the use of 5dAdo and MTA as a carbon source for growth. When MTA is the substrate, the sulfur component is not significantly recycled back to methionine but rather accumulates as 2-methylthioethanol, which is slowly oxidized non-enzymatically under aerobic conditions. The DHAP shunt in ATCC 25922 is active under oxic and anoxic conditions. Growth using 5-deoxy-d-ribose was observed during aerobic respiration and anaerobic respiration with Trimethylamine N-oxide (TMAO), but not during fermentation or respiration with nitrate. This suggests the DHAP shunt may only be relevant for extraintestinal pathogenic E. coli lineages with the DHAP shunt that inhabit oxic or TMAO-rich extraintestinal environments. This reveals a heretofore overlooked role of the DHAP shunt in carbon and energy metabolism from ubiquitous SAM utilization byproducts and suggests a similar role may occur in other pathogenic and non-pathogenic bacteria with the DHAP shunt. IMPORTANCE The acquisition and utilization of organic compounds that serve as growth substrates are essential for Escherichia coli to grow and multiply. Ubiquitous enzymatic reactions involving S-adenosyl-l-methionine as a co-substrate by all organisms result in the formation of the 5'-deoxy-nucleoside byproducts, 5'-methylthioadenosine and 5'-deoxyadenosine. All E. coli possess a conserved nucleosidase that cleaves these 5'-deoxy-nucleosides into 5-deoxy-pentose sugars for adenine salvage. The DHAP shunt pathway is found in some extraintestinal pathogenic E. coli, but its function in E. coli possessing it has remained unknown. This study reveals that the DHAP shunt enables the utilization of 5'-deoxy-nucleosides and 5-deoxy-pentose sugars as growth substrates in E. coli strains with the pathway during aerobic respiration and anaerobic respiration with TMAO, but not fermentative growth. This provides an insight into the diversity of sugar compounds accessible by E. coli with the DHAP shunt and suggests that the DHAP shunt is primarily relevant in oxic or TMAO-rich extraintestinal environments.
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Affiliation(s)
| | - Joshua T. Groves
- Department of Microbiology, The Ohio State University, Columbus, Ohio, USA
| | - John A. Wildenthal
- Department of Microbiology, The Ohio State University, Columbus, Ohio, USA
| | - F. Robert Tabita
- Department of Microbiology, The Ohio State University, Columbus, Ohio, USA
| | - Justin A. North
- Department of Microbiology, The Ohio State University, Columbus, Ohio, USA
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Merkus VI, Leupold MS, Rockel SP, Schmidt TC. Ozonation products of purine derivatives, the basic structures of antiviral micropollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169073. [PMID: 38049003 DOI: 10.1016/j.scitotenv.2023.169073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/28/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023]
Abstract
Purine and its nucleobases adenine and guanine are the basic structures of a large group of antiviral agents such as acyclovir and penciclovir. Hence, their ozonation is of interest with regard to wastewater treatment due to the formation of products that could affect the aquatic environment. In this study, the transformation products of the mentioned substances are investigated under different defined reaction conditions in order to gain insight into the ozonation characteristics of this compound class. Results show that examining related molecules significantly improves product screening by compiling known products and analogues leading to comprehensive candidate lists, for the purines with a total number of >120 candidates (including possible duplicates for several purines) of which 49 were detected for the derivatives studied. One product, cyanuric acid, which was previously postulated for adenine, was tentatively confirmed and quantified for the first time for the reaction of purine and adenine with ozone. In addition, two prioritisation approaches are presented to identify the major products that are either formed under specific reaction conditions or are potentially relevant for structurally related pollutants. First, principal component analysis allowed the prioritisation of the products formed according to reaction conditions. In the analysis of guanine and the two antivirals, this approach showed that at neutral and basic pH the 2-imino-5-oxoimidazoline products dominated while at acidic pH either analogues of 5-amino-2,4-imidazolidinedione or 2,4-diamino-1,3-oxazol-5-(2H)-one were abundant. A second approach prioritising common products in the ozonation of all three basic structures revealed the formation of two products that had not been reported before: C4H8O3 and C3H2N2O3, presumably oxalylurea. Both molecules or their analogues may also be formed from related micropollutants. Overall, examining basic structures and exemplary micropollutants in combination was shown to be a worthwhile approach to gain knowledge on the ozonation of a whole range of compounds.
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Affiliation(s)
- Valentina I Merkus
- Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Michael S Leupold
- Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Sarah P Rockel
- Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Torsten C Schmidt
- Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany; Centre for Water and Environmental Research (ZWU), Universitätsstraße 5, 45141 Essen, Germany; IWW Water Centre, Moritzstraße 26, 45476 Mülheim an der Ruhr, Germany.
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3
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Li X, Liu Z, Li Z, Xiong X, Zhang X, Yang C, Zhao L, Zhao R. A simple, rapid and sensitive HILIC LC-MS/MS method for simultaneous determination of 16 purine metabolites in plasma and urine. Talanta 2024; 267:125171. [PMID: 37696233 DOI: 10.1016/j.talanta.2023.125171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/23/2023] [Accepted: 09/05/2023] [Indexed: 09/13/2023]
Abstract
Purine intermediates play important roles in physiological function and participate in the kidney disorders, while a targeted quantification of the metabolic alterations in the purine metabolism in acute kidney injury (AKI) individuals has not been conducted. In the study, a novel, rapid and sensitive LC-MS method for simultaneous quantification of 16 purine metabolites was developed using hydrophilic interaction separation mode in human plasma and urine. The developed method was validated by using charcoal-stripped plasma and urine as blank matrix. The results showed that the method was good linear (R2 > 0.99) and the lower limit of quantification (LLOQ) ranged from 0.833 ng/mL to 800 ng/mL. The recovery and matrix effect were repeatable and stable. The intraday precision ranged from 0.7% to 12.7%, while the inter-day precision ranged from 1.6% to 18.5%. Most analytes were stable in the autosampler and could subject three freeze-thaw cycles. The method provided a wider coverage of purine metabolites and completed good separation of interfering compounds of nucleosides, deoxynucleosides and their corresponding nucleobases without derivatization, which was time-saving and labor-saving for the large-scale analysis. Furthermore, the method was successfully applied to plasma and urine samples of hospitalized patients without and with AKI. The results showed certain purine intermediates were up-regulated in plasma and down-regulated in urine of AKI inpatients, indicating that AKI stress may associate with inflammatory responses. The novel method can facilitate the quantitative analysis of purine metabolites in biological fluids, and exhibit great prospects in providing more information on the pathogenesis of AKI.
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Affiliation(s)
- Xiaona Li
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; Therapeutic Drug Monitoring and Clinical Toxicology Center of Peking University, Beijing, 100191, China
| | - Zhini Liu
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; School of Basic Medical and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu Province 211198, China
| | - Zhuo Li
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; School of Basic Medical and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu Province 211198, China
| | - Xin Xiong
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; Therapeutic Drug Monitoring and Clinical Toxicology Center of Peking University, Beijing, 100191, China
| | - Xianhua Zhang
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; Therapeutic Drug Monitoring and Clinical Toxicology Center of Peking University, Beijing, 100191, China
| | - Changqing Yang
- School of Basic Medical and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu Province 211198, China.
| | - Libo Zhao
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; Therapeutic Drug Monitoring and Clinical Toxicology Center of Peking University, Beijing, 100191, China.
| | - Rongsheng Zhao
- Department of Pharmacy, Peking University Third Hospital, Beijing, 100191, China; Therapeutic Drug Monitoring and Clinical Toxicology Center of Peking University, Beijing, 100191, China.
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Huening KA, Groves JT, Wildenthal JA, Tabita FR, North JA. Utilization of 5'-deoxy-nucleosides as Growth Substrates by Extraintestinal Pathogenic E. coli via the Dihydroxyacetone Phosphate Shunt. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.10.552779. [PMID: 37609188 PMCID: PMC10441430 DOI: 10.1101/2023.08.10.552779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
All organisms utilize S-adenosyl-l-methionine (SAM) as a key co-substrate for methylation of biological molecules, synthesis of polyamines, and radical SAM reactions. When these processes occur, 5'-deoxy-nucleosides are formed as byproducts such as S-adenosyl-l-homocysteine (SAH), 5'-methylthioadenosine (MTA), and 5'-deoxyadenosine (5dAdo). One of the most prevalent pathways found in bacteria for the metabolism of MTA and 5dAdo is the DHAP shunt, which converts these compounds into dihydroxyacetone phosphate (DHAP) and 2-methylthioacetaldehyde or acetaldehyde, respectively. Previous work has shown that the DHAP shunt can enable methionine synthesis from MTA or serve as an MTA and 5dAdo detoxification pathway. Here we show that in Extraintestinal Pathogenic E. coil (ExPEC), the DHAP shunt serves none of these roles in any significant capacity, but rather physiologically functions as an assimilation pathway for use of MTA and 5dAdo as growth substrates. This is further supported by the observation that when MTA is the substrate for the ExPEC DHAP shunt, the sulfur components is not significantly recycled back to methionine, but rather accumulates as 2-methylthioethanol, which is slowly oxidized non-enzymatically under aerobic conditions. While the pathway is active both aerobically and anaerobically, it only supports aerobic ExPEC growth, suggesting that it primarily functions in oxygenic extraintestinal environments like blood and urine versus the predominantly anoxic gut. This reveals a heretofore overlooked role of the DHAP shunt in carbon assimilation and energy metabolism from ubiquitous SAM utilization byproducts and suggests a similar role may occur in other pathogenic and non-pathogenic bacteria with the DHAP shunt.
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Affiliation(s)
| | - Joshua T. Groves
- The Ohio State University Department of Microbiology, Columbus, OH, 43210
| | - John A. Wildenthal
- The Ohio State University Department of Microbiology, Columbus, OH, 43210
| | - F. Robert Tabita
- The Ohio State University Department of Microbiology, Columbus, OH, 43210
| | - Justin A. North
- The Ohio State University Department of Microbiology, Columbus, OH, 43210
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Rapp J, Forchhammer K. 5-Deoxyadenosine Metabolism: More than "Waste Disposal". Microb Physiol 2021; 31:248-259. [PMID: 34126623 DOI: 10.1159/000516105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/19/2021] [Indexed: 11/19/2022]
Abstract
5-Deoxyadenosine (5dAdo) is a by-product of many radical SAM enzyme reactions in all domains of life, and an inhibitor of the radical SAM enzymes themselves. Hence, pathways to recycle or dispose of this toxic by-product must exist but remain largely unexplored. In this review, we discuss the current knowledge about canonical and atypical 5dAdo salvage pathways that have been characterized in the last years. We highlight studies that report on how, in certain organisms, the salvage of 5dAdo via specific pathways can confer a growth advantage by providing either intermediates for the synthesis of secondary metabolites or a carbon source for the synthesis of metabolites of the central carbon metabolism. Yet, an alternative recycling route exists in organisms that use 5dAdo as a substrate to synthesize and excrete 7-deoxysedoheptulose, an allelopathic inhibitor of one enzyme of the shikimate pathway, thereby competing for their own niche. Remarkably, most steps of 5dAdo salvage are the result of the activity of promiscuous enzymes. This strategy enables even organisms with a small genome to synthesize bioactive compounds which they can deploy under certain conditions to gain a competitive growth advantage. We conclude emphasizing that, unexpectedly, 5dAdo salvage pathways seem not to be ubiquitously present, raising questions about the fate of such a toxic by-product in those species. This observation also suggests that additional 5dAdo salvage pathways, possibly relying on the activity of promiscuous enzymes, may exist. The future challenge will be to bring to light these "cryptic" 5dAdo recycling pathways.
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Affiliation(s)
- Johanna Rapp
- Interfaculty Institute of Microbiology and Infection Medicine, Microbiology/Organismic Interactions, Eberhard Karls Universität Tübingen, Tübingen, Germany
| | - Karl Forchhammer
- Interfaculty Institute of Microbiology and Infection Medicine, Microbiology/Organismic Interactions, Eberhard Karls Universität Tübingen, Tübingen, Germany
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6
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Zahran F, Rashed R, Omran M, Darwish H, Belal A. Study on Urinary Candidate Metabolome for the Early Detection of Breast Cancer. Indian J Clin Biochem 2020; 36:319-329. [PMID: 34220007 DOI: 10.1007/s12291-020-00905-6] [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: 02/23/2020] [Accepted: 06/12/2020] [Indexed: 10/24/2022]
Abstract
A metabolomic study for determination of certain urinary metabolomes, 1-methyladenosine (1-MA), 1-methylguanosine (1-MG), and 8-hydroxy-2' deoxyguanosine (8-OHdG) in urine specimens of breast cancer patients. The accuracy of these metabolites and their combined score with cancer antigen 15-3 (CA15-3) was developed to improve the early detection of breast cancer. This study recruited 52 healthy individuals, 47 benign breast tumors, and 167 malignant breast tumor patients. Urine samples were handled to adjust the creatinine concentrations to 8 mg/dL (0.7 mmol/L) and analyzed using GC-MS to detect and quantify the selected urinary metabolomes in urine samples of all participants. The accuracy of individual urinary metabolomes and their combination with CA15-3 were evaluated using multivariate statistical analysis. The cutoff value of CA15-3 was 32.5 U/mL. Cutoff values of 1-MA, 1-MG, and 8-OHdG were 2.19, 2.1, and 7.3 µmol/mmol creatinine, respectively. The concentrations of 1-MA, 1-MG, and 8-OHdG were significantly higher in breast cancer patients, especially in the early-stage. The combination of three urinary metabolomes with CA15-3 improves the diagnostic sensitivity of breast cancer. For the combined score, the area under the curve (AUC) value of combined score ranged from 0.820 to 0.950, with high accuracy, ranged from 77.0 to 95.5%. The most significant AUC (0.973), sensitivity (90.1%), selectivity (94.0%) was recorded at comparing the healthy control with the early-stage of malignant breast cancer. In conclusion, the combination of three urinary metabolomes with serum CA15-3 improves the diagnostic sensitivity of breast cancer.
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Affiliation(s)
- Faten Zahran
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Ramzy Rashed
- Laboratory of Toxicology, Central Laboratories, Ministry of Health, Damietta, Egypt
| | - Mohamed Omran
- Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt
| | - Hossam Darwish
- Damietta Cancer Institute, Damietta/Ismailia Teaching Oncology Hospital, Ismailia, Egypt
| | - Arafa Belal
- Chemistry Department, Faculty of Science, Port Said University, Port Said, Egypt
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7
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North JA, Wildenthal JA, Erb TJ, Evans BS, Byerly KM, Gerlt JA, Tabita FR. A bifunctional salvage pathway for two distinct S-adenosylmethionine by-products that is widespread in bacteria, including pathogenic Escherichia coli. Mol Microbiol 2020; 113:923-937. [PMID: 31950558 DOI: 10.1111/mmi.14459] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 01/08/2020] [Accepted: 01/12/2020] [Indexed: 01/19/2023]
Abstract
S-adenosyl-l-methionine (SAM) is a necessary cosubstrate for numerous essential enzymatic reactions including protein and nucleotide methylations, secondary metabolite synthesis and radical-mediated processes. Radical SAM enzymes produce 5'-deoxyadenosine, and SAM-dependent enzymes for polyamine, neurotransmitter and quorum sensing compound synthesis produce 5'-methylthioadenosine as by-products. Both are inhibitory and must be addressed by all cells. This work establishes a bifunctional oxygen-independent salvage pathway for 5'-deoxyadenosine and 5'-methylthioadenosine in both Rhodospirillum rubrum and Extraintestinal Pathogenic Escherichia coli. Homologous genes for this pathway are widespread in bacteria, notably pathogenic strains within several families. A phosphorylase (Rhodospirillum rubrum) or separate nucleoside and kinase (Escherichia coli) followed by an isomerase and aldolase sequentially function to salvage these two wasteful and inhibitory compounds into adenine, dihydroxyacetone phosphate and acetaldehyde or (2-methylthio)acetaldehyde during both aerobic and anaerobic growth. Both SAM by-products are metabolized with equal affinity during aerobic and anaerobic growth conditions, suggesting that the dual-purpose salvage pathway plays a central role in numerous environments, notably the human body during infection. Our newly discovered bifunctional oxygen-independent pathway, widespread in bacteria, salvages at least two by-products of SAM-dependent enzymes for carbon and sulfur salvage, contributing to cell growth.
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Affiliation(s)
- Justin A North
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
| | - John A Wildenthal
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
| | - Tobias J Erb
- Department of Biochemistry and Synthetic Metabolism, Max Planck Institute for Terrestrial Microbiology, Marburg, Germany
| | - Bradley S Evans
- The Donald Danforth Plant Science Center, St. Louis, MO, USA
| | - Kathryn M Byerly
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
| | - John A Gerlt
- Department of Biochemistry, The Institute for Genomic Biology, Champaign, IL, USA.,Department of Chemistry, University of Illinois at Urbana-Champaign, Champaign, IL, USA
| | - Fred R Tabita
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
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8
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Godoy AT, Eberlin MN, Simionato AVC. Targeted metabolomics: Liquid chromatography coupled to mass spectrometry method development and validation for the identification and quantitation of modified nucleosides as putative cancer biomarkers. Talanta 2019; 210:120640. [PMID: 31987192 DOI: 10.1016/j.talanta.2019.120640] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/26/2019] [Accepted: 12/09/2019] [Indexed: 12/29/2022]
Abstract
A notable change in the body fluids nucleosides of cancer patients has been actively highlighted in searches for new biomarkers to early cancer detection. For this reason, improvements of bioanalytical methods for these compounds focused on a noninvasive sampling trend are of great importance. Therefore, this work aimed firstly to develop efficient methods for nucleoside analysis in urine and serum by liquid chromatography-tandem mass spectrometry (LC-MS/MS), applying different strategies to quantify nine nucleosides, and further identify other untargeted nucleosides. Sample preparation was based on protein precipitation and affinity-solid phase extraction (SPE), whereas quantification was performed using a triple quadrupole (QqQ) mass analyzer operating in the selected reaction monitoring (SRM) mode. Surrogates matrices were proposed as an alternative to standard addition calibration. Specifically, to quantitate creatinine, a simple LC-MS/MS method was validated and used for normalization of urinary metabolites quantitation. To identify the other nucleosides, LC methods using different MS scans modes were evaluated on a quadrupole-time of flight (Q-TOF) or a hybrid triple quadrupole linear ion trap (Q-trap). Validation was performed for nucleosides quantification using the synthetic matrices of urine and serum, and selectivity, linearity, accuracy, reproducibility, matrix effect, LOD's and LOQ's were accessed, providing trustworthy results for bioanalysis purposes. Both LC-Q-Trap/MS and LC-Q-TOF/MS methods showed proper sensitivity for structural characterization on assays with urine and serum samples from healthy volunteers and could also be used in the identification of untargeted nucleosides. The investigated approaches delivered in-depth results and seem promising for future applications on urine and serum samples analyses aiming to validate nucleosides as cancer biomarkers.
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Affiliation(s)
- Adriana Teixeira Godoy
- Department of Analytical Chemistry, Institute of Chemistry, University of Campinas, 13083-970, Campinas, SP, Brazil.
| | - Marcos Nogueira Eberlin
- Department of Analytical Chemistry, Institute of Chemistry, University of Campinas, 13083-970, Campinas, SP, Brazil; Mackenzie Presbyterian University, MackMass Laboratory, Scholl of Engineering, 01302-907, São Paulo, SP, Brazil
| | - Ana Valéria Colnaghi Simionato
- Department of Analytical Chemistry, Institute of Chemistry, University of Campinas, 13083-970, Campinas, SP, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas, 13083-970, Campinas, SP, Brazil.
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9
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Lin X, Wang L, Lin H, Lin D, Lin J, Liu X, Qiu S, Xu Y, Chen G, Feng S. A novel urine analysis technique combining affinity chromatography with Au nanoparticle based surface enhanced Raman spectroscopy for potential applications in non-invasive cancer screening. JOURNAL OF BIOPHOTONICS 2019; 12:e201800327. [PMID: 30447050 DOI: 10.1002/jbio.201800327] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/22/2018] [Accepted: 11/14/2018] [Indexed: 05/20/2023]
Abstract
Modified nucleoside in urine samples is one of the most common biomarkers for cancer screening. Therefore, we developed a novel detection method for modified nucleoside detection in human urine. In this work, the modified nucleoside from real cancer patient's urine samples was first separated and purified using the affinity chromatography (AC) technology relying on its specific adsorption capacity. Then, surface-enhanced Raman spectroscopy (SERS) technology with the capability of single molecular detection was used to sensitively characterize the biomolecular features of modified nucleoside. A total of 141 high-quality SERS spectra of urinary modified nucleoside can be obtained from 50 gastric cancer patients and 43 breast cancer patients, as well as 48 healthy volunteers. Using principal component analysis combined with linear discriminant analysis (PCA-LDA), the diagnostic sensitivities for identifying gastric cancer vs normal, breast cancer vs normal, gastric cancer vs breast cancer were 84.0%, 76.7% and 82.0%, respectively, and the corresponding diagnostic specificities for each combination were 95.8%, 87.5% and 90.7%, respectively. These results show that this novel method based on urinary modified nucleoside detection combining AC and SERS technologies holds promising potential for developing a specific, non-invasive and label-free tool for cancer screening.
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Affiliation(s)
- Xueliang Lin
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Lingna Wang
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, China
| | - Huijing Lin
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Duo Lin
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Jinyong Lin
- Radiation Oncology Department, Fujian Cancer Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fujian Cancer Hospital, Fuzhou, China
| | - Xiujie Liu
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Sufang Qiu
- Radiation Oncology Department, Fujian Cancer Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fujian Cancer Hospital, Fuzhou, China
| | - Yuanji Xu
- Radiation Oncology Department, Fujian Cancer Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fujian Cancer Hospital, Fuzhou, China
| | - Guannan Chen
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Shangyuan Feng
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, China
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Feng S, Zheng Z, Xu Y, Lin J, Chen G, Weng C, Lin D, Qiu S, Cheng M, Huang Z, Wang L, Chen R, Xie S, Zeng H. A noninvasive cancer detection strategy based on gold nanoparticle surface-enhanced raman spectroscopy of urinary modified nucleosides isolated by affinity chromatography. Biosens Bioelectron 2017; 91:616-622. [DOI: 10.1016/j.bios.2017.01.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/19/2016] [Accepted: 01/04/2017] [Indexed: 12/11/2022]
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11
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Jiang M, Prokhorova AF, Rozhmanova NB, Shpigun OA. Electrophoretic separation of some nucleosides for the diagnosis of mastopathy and fibroadenoma. JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1134/s1061934816120091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Alterations of the exo- and endometabolite profiles in breast cancer cell lines: A mass spectrometry-based metabolomics approach. Anal Chim Acta 2016; 925:34-42. [PMID: 27188315 DOI: 10.1016/j.aca.2016.04.047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/15/2016] [Accepted: 04/22/2016] [Indexed: 12/28/2022]
Abstract
In recent years, knowledge about metabolite changes which are characteristic for the physiologic state of cancer cells has been acquired by liquid chromatography coupled to mass spectrometry. Distinct molecularly characterized breast cancer cell lines provide an unbiased and standardized in vitro tumor model reflecting the heterogeneity of the disease. Tandem mass spectrometry is a widely applied analytical platform and highly sensitive technique for analysis of complex biological samples. Endo- and exometabolite analysis of the breast cancer cell lines MDA-MB-231, -453 and BT-474 as well as the breast epithelial cell line MCF-10A has been performed using two different analytical platforms: UPLC-ESI-Q-TOF based on a scheduled precursor list has been applied for highlighting of significant differences between cell lines and HPLC-ESI-QqQ using multiple reaction monitoring has been utilized for a targeted approach focusing on RNA metabolism and interconnected pathways, respectively. Statistical analysis enabled a clear discrimination of the breast epithelial from the breast cancer cell lines. As an effect of oxidative stress, a decreased GSH/GSSG ratio has been detected in breast cancer cell lines. The triple negative breast cancer cell line MDA-MB-231 showed an elevation in nicotinamide, 1-ribosyl-nicotinamide and NAD+ reflecting the increased energy demand in triple negative breast cancer, which has a more aggressive clinical course than other forms of breast cancer. Obtained distinct metabolite pattern could be correlated with distinct molecular characteristics of breast cancer cells. Results and methodology of this preliminary in vitro study could be transferred to in vivo studies with breast cancer patients.
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13
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Fan H, Chen P, Wang C, Wei Y. Zirconium-doped magnetic microspheres for the selective enrichment of cis-diol-containing ribonucleosides. J Chromatogr A 2016; 1448:20-31. [PMID: 27130580 DOI: 10.1016/j.chroma.2016.04.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/04/2016] [Accepted: 04/18/2016] [Indexed: 02/07/2023]
Abstract
Zirconium-doped magnetic microspheres (Zr-Fe3O4) for the selective enrichment of cis-diol-containing biomolecules were easily synthesized via a one-step hydrothermal method. Characterization of the microspheres revealed that zirconium was successfully doped into the lattice of Fe3O4 at a doping level of 4.0 at%. Zr-Fe3O4 possessed good magnetic properties and high specificity towards cis-diol molecules, as shown using 28 compounds. For ribonucleosides, the adsorbent not only has favorable anti-interferential abilities but also has a high adsorption capacity up to 159.4μmol/g. As an example of a real application, four ribonucleosides in urine were efficiently enriched and detected via magnetic solid-phase extraction coupled with high-performance liquid chromatography. Under the optimized extraction conditions, the detection limits were determined to be between 0.005 and 0.017μg/mL, and the linearities ranged from 0.02 to 5.00μg/mL (R≥0.996) for these analytes. The accuracy of the analytical method was examined by studying the relative recoveries of the analytes in real urine samples, with recoveries varying from 77.8% to 119.6% (RSDs<10.6%, n=6). The results indicate that Zr-Fe3O4 is a suitable adsorbent for the analysis of cis-diol-containing biomolecules in practical applications.
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Affiliation(s)
- Hua Fan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, Xi'an 710127, PR China
| | - Peihong Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, Xi'an 710127, PR China
| | - Chaozhan Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, Xi'an 710127, PR China
| | - Yinmao Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, Xi'an 710127, PR China.
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14
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Chen Z, Huang C, Liu W, Zhang L, Tong P, Zhang L. Simultaneous determination of nucleoside and purine compounds in human urine based on a hydrophobic monolithic column using capillary electrochromatography. Electrophoresis 2015; 36:2727-2735. [DOI: 10.1002/elps.201500194] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 08/05/2015] [Accepted: 08/06/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Zongbao Chen
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Testing Center; Fuzhou University; Fuzhou Fujian China
- Key Laboratory of Applied Organic Chemistry, Department of Chemistry; Shangrao Normal University; Shangrao Jiangxi China
| | - Chuanghui Huang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Testing Center; Fuzhou University; Fuzhou Fujian China
| | - Wei Liu
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Testing Center; Fuzhou University; Fuzhou Fujian China
| | - Lin Zhang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Testing Center; Fuzhou University; Fuzhou Fujian China
| | - Ping Tong
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Testing Center; Fuzhou University; Fuzhou Fujian China
| | - Lan Zhang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Testing Center; Fuzhou University; Fuzhou Fujian China
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15
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Buzatto AZ, Guedes SF, de Oliveira Silva M, Gallafrio JM, Simionato AVC. Higher detectability method for the analysis of nucleosides, putative tumor biomarkers, in blood serum samples by CE-UV with reversed EOF. Electrophoresis 2015; 36:2968-75. [DOI: 10.1002/elps.201500161] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/03/2015] [Accepted: 07/23/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Adriana Zardini Buzatto
- Laboratory of Biomolecules Analysis Tiselius (LABi Tiselius), Department of Analytical Chemistry, Chemistry Institute; Campinas State University (UNICAMP); Campinas SP Brazil
| | - Sumaya Ferreira Guedes
- Laboratory of Biomolecules Analysis Tiselius (LABi Tiselius), Department of Analytical Chemistry, Chemistry Institute; Campinas State University (UNICAMP); Campinas SP Brazil
| | - Mariana de Oliveira Silva
- Laboratory of Biomolecules Analysis Tiselius (LABi Tiselius), Department of Analytical Chemistry, Chemistry Institute; Campinas State University (UNICAMP); Campinas SP Brazil
| | - Jéssica Mirela Gallafrio
- Laboratory of Biomolecules Analysis Tiselius (LABi Tiselius), Department of Analytical Chemistry, Chemistry Institute; Campinas State University (UNICAMP); Campinas SP Brazil
| | - Ana Valéria Colnaghi Simionato
- Laboratory of Biomolecules Analysis Tiselius (LABi Tiselius), Department of Analytical Chemistry, Chemistry Institute; Campinas State University (UNICAMP); Campinas SP Brazil
- National Institute of Science and Technology in Bioanalytics (INCTBio), Chemistry Institute; Campinas State University (UNICAMP); Campinas SP Brazil
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16
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Exometabolom analysis of breast cancer cell lines: Metabolic signature. Sci Rep 2015; 5:13374. [PMID: 26293811 PMCID: PMC4544000 DOI: 10.1038/srep13374] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 07/24/2015] [Indexed: 12/26/2022] Open
Abstract
Cancer cells show characteristic effects on cellular turnover and DNA/RNA modifications leading to elevated levels of excreted modified nucleosides. We investigated the molecular signature of different subtypes of breast cancer cell lines and the breast epithelial cell line MCF-10A. Prepurification of cell culture supernatants was performed by cis-diol specific affinity chromatography using boronate-derivatized polyacrylamide gel. Samples were analyzed by application of reversed phase chromatography coupled to a triple quadrupole mass spectrometer. Collectively, we determined 23 compounds from RNA metabolism, two from purine metabolism, five from polyamine/methionine cycle, one from histidine metabolism and two from nicotinate and nicotinamide metabolism. We observed major differences of metabolite excretion pattern between the breast cancer cell lines and MCF-10A, just as well as between the different breast cancer cell lines themselves. Differences in metabolite excretion resulting from cancerous metabolism can be integrated into altered processes on the cellular level. Modified nucleosides have great potential as biomarkers in due consideration of the heterogeneity of breast cancer that is reflected by the different molecular subtypes of breast cancer. Our data suggests that the metabolic signature of breast cancer cell lines might be a more subtype-specific tool to predict breast cancer, rather than a universal approach.
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17
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Brewer AJ, Lunte C. Analysis of Nucleosides in Municipal Wastewater by Large-Volume Liquid Chromatography Tandem Mass Spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2015; 7:5504-5510. [PMID: 26322136 PMCID: PMC4551110 DOI: 10.1039/c5ay00929d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Nucleosides are components of both DNA and RNA, and contain either a ribose (RNA) or 2deoxyribose (DNA) sugar and a purine or pyrimidine base. In addition to DNA and RNA turnover, modified nucleosides found in urine have been correlated to a diminished health status associated with AIDS, cancers, oxidative stress and age. Nucleosides found in municipal wastewater influent are potentially useful markers of community health status, and as of now, remain uninvestigated. A method was developed to quantify nucleosides in municipal wastewater using large-volume injection, liquid chromatography, and mass spectrometry. Method accuracy ranged from 92 to 139% when quantified by using isotopically labeled internal standards. Precision ranged from 6.1 to 19% of the relative standard deviation. The method's utility was demonstrated by the analysis of twenty-four hour composite wastewater influent samples that were collected over a week to investigate community nucleoside excretion. Nucleosides originating from RNA were more abundant that DNA over the study period, with total loads of nucleosides ranging from 2 to 25 kg/day. Given this relatively high amount of nucleosides found over the study period they present an attractive analyte for the investigation of community health.
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Affiliation(s)
- Alex J. Brewer
- Department of Chemistry, University of Kansas, Lawrence, KS. 2030 Becker Drive Room 220, Lawrence, KS 66045
| | - Craig Lunte
- Department of Chemistry, University of Kansas, Lawrence, KS. 2030 Becker Drive Room 220, Lawrence, KS 66045
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18
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Qin Q, Li H, Shi X, Xu G. Facile synthesis of Fe3
O4
@polyethyleneimine modified with 4-formylphenylboronic acid for the highly selective extraction of major catecholamines from human urine. J Sep Sci 2015; 38:2857-64. [DOI: 10.1002/jssc.201500377] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 05/10/2015] [Accepted: 05/11/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Qian Qin
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Hua Li
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Xianzhe Shi
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Guowang Xu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
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19
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Daghir-Wojtkowiak E, Struck-Lewicka W, Waszczuk-Jankowska M, Markuszewski M, Kaliszan R, Markuszewski MJ. Statistical-based approach in potential diagnostic application of urinary nucleosides in urogenital tract cancer. Biomark Med 2015; 9:577-95. [DOI: 10.2217/bmm.15.20] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aim: We aimed at evaluation the potential diagnostic role of urinary nucleosides in urogenital tract cancer. Materials & methods: Concentrations of 12 nucleosides determined by LC-MS/MS were subjected to correlation, association and interaction analyses. Results: We identified six pairs of nucleosides differently correlated in the group of patients and controls (p < 0.05). N-2-methylguanosine (odds ratio: 4.82; 95% CI: 1.78–12.93; p = 0.002) and N,N-dimethylguanosine (odds ratio: 5.45; 95% CI: 1.78–16.44; p = 0.003), were significantly associated with the disease risk (p-corrected = 0.004). Interaction between N-2-methylguanosine and adenosine (p-interaction = 0.019) suggested their multiplicative effect on the outcome. Conclusion: Urinary nucleosides, namely N,N-dimethylguanosine and N-2-methylguanosine may have the potential to serve as prognostic biomarkers. Gender-specific differences in urogenital tract cancer are likely to occur.
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Affiliation(s)
- Emilia Daghir-Wojtkowiak
- Department of Biopharmaceutics & Pharmacodynamics, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
- Department of Toxicology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, M. Curie-Sklodowskiej 9, 85-094 Bydgoszcz, Poland
| | - Wiktoria Struck-Lewicka
- Department of Biopharmaceutics & Pharmacodynamics, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
| | - Malgorzata Waszczuk-Jankowska
- Department of Biopharmaceutics & Pharmacodynamics, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
| | - Marcin Markuszewski
- Department of Urology, Medical University of Gdańsk, Smoluchowskiego 17, 80–214 Gdańsk, Poland
| | - Roman Kaliszan
- Department of Biopharmaceutics & Pharmacodynamics, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
| | - Michal Jan Markuszewski
- Department of Biopharmaceutics & Pharmacodynamics, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
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20
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Metabolome analysis via comprehensive two-dimensional liquid chromatography: identification of modified nucleosides from RNA metabolism. Anal Bioanal Chem 2015; 407:3555-66. [PMID: 25736241 DOI: 10.1007/s00216-015-8516-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 01/21/2015] [Accepted: 01/23/2015] [Indexed: 10/23/2022]
Abstract
Modified nucleosides derived from the RNA metabolism constitute an important chemical class, which are discussed as potential biomarkers in the detection of mammalian breast cancer. Not only the variability of modifications, but also the complexity of biological matrices such as urinary samples poses challenges in the analysis of modified nucleosides. In the present work, a comprehensive two-dimensional liquid chromatography mass spectrometry (2D-LC-MS) approach for the analysis of modified nucleosides in biological samples was established. For prepurification of urinary samples and cell culture supernatants, we performed a cis-diol specific affinity chromatography using boronate-derivatized polyacrylamide gel. In order to establish a 2D-LC method, we tested numerous column combinations and chromatographic conditions. In order to determine the target compounds, we coupled the 2D-LC setup to a triple quadrupole mass spectrometer performing full scans, neutral loss scans, and multiple reaction monitoring (MRM). The combination of a Zorbax Eclipse Plus C18 column with a Zorbax Bonus-RP column was found to deliver a high degree of orthogonality and adequate separation. By application of 2D-LC-MS approaches, we were able to detect 28 target compounds from RNA metabolism and crosslinked pathways in urinary samples and 26 target compounds in cell culture supernatants, respectively. This is the first demonstration of the applicability and benefit of 2D-LC-MS for the targeted metabolome analysis of modified nucleosides and compounds from crosslinked pathways in different biological matrices.
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21
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Yang T, Guo X, Wu Y, Wang H, Fu S, Wen Y, Yang H. Facile and label-free detection of lung cancer biomarker in urine by magnetically assisted surface-enhanced Raman scattering. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20985-93. [PMID: 25393238 DOI: 10.1021/am5057536] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Adenosine plays a crucial role in the regulation of physiological activity in various tissues and organs. As adenosine is a possible biomarker for cancer, the determination of its level presents a demanding task for deeply monitoring progress of diseases. Through the synthesis of Fe3O4/Au/Ag nanocomposites weaved and stabilized by phytic acid and its salt, we develop a magnetically assisted surface-enhanced Raman scattering (SERS) protocol to determine trace level adenosine in urine samples from both lung cancer patients and health human. The magnetic properties of the nanocomposites enable to realize the simple separation of targeted molecules from a complex matrix and the Au/Ag nanoparticles moieties act as the SERS platform. This label-free Fe3O4/Au/Ag-nanocomposites-based SERS protocol shows a good stability, reproducibility, time efficiency (less than 20 min for one sample test), and huge sensitivity down to 1 × 10(-10) M. The protocol also has high selectivity because SERS signal of adenosine provides the molecular fingerprint information as well as an azo coupling pretreatment is performed to remove the interference of urea. Furthermore, a SERS array is designed for on-site screening adenosine in urine samples in a massive way using a portable Raman. Such a magnetically assisted SERS method as a powerful alternative can be expected as a smart and promising tool for effective assessment of healthcare.
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Affiliation(s)
- Tianxi Yang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors and Department of Chemistry, Shanghai Normal University , Shanghai 200234, P. R. China
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22
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Okutucu B, Vurmaz D, Tuncal A, Türkcan C, Aktaş Uygun D, Akgöl S. Boronate affinity nanoparticles for nucleoside separation. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:322-7. [DOI: 10.3109/21691401.2014.948550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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23
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Li H, Shan Y, Qiao L, Dou A, Shi X, Xu G. Facile Synthesis of Boronate-Decorated Polyethyleneimine-Grafted Hybrid Magnetic Nanoparticles for the Highly Selective Enrichment of Modified Nucleosides and Ribosylated Metabolites. Anal Chem 2013; 85:11585-92. [DOI: 10.1021/ac402979w] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Hua Li
- CAS Key Lab of Separation Sciences for
Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yuanhong Shan
- CAS Key Lab of Separation Sciences for
Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Lizhen Qiao
- CAS Key Lab of Separation Sciences for
Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Abo Dou
- CAS Key Lab of Separation Sciences for
Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xianzhe Shi
- CAS Key Lab of Separation Sciences for
Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Guowang Xu
- CAS Key Lab of Separation Sciences for
Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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24
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Zhao HQ, Wang X, Li HM, Yang B, Yang HJ, Huang L. Characterization of nucleosides and nucleobases in natural Cordyceps by HILIC-ESI/TOF/MS and HILIC-ESI/MS. Molecules 2013; 18:9755-69. [PMID: 23955321 PMCID: PMC6270082 DOI: 10.3390/molecules18089755] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 08/07/2013] [Accepted: 08/08/2013] [Indexed: 11/17/2022] Open
Abstract
A method combining hydrophilic interaction chromatography (HILIC) and electrospray ionization mass spectrometry (ESI-MS) was developed for the characterization and determination of natural Cordyceps. Separation was achieved on a Waters Xbridge Amide column with gradient elution. Identification of 15 target nucleosides and nucleobases was based on retention time, UV spectra and mass measurements of the protonated molecules ([M+H]⁺) and main fragment ions (ESI-TOF/MS). Eight non-target compounds were tentatively identified by ESI-TOF/MS. The 15 target compounds were quantified by HILIC-ESI-MS/MS using time-programmed selective ion monitoring or multiple reaction monitoring in positive-ion mode under optimized mass conditions. This technique showed good linearity, repeatability and recovery. This approach was also successfully implemented in the analysis of nucleosides and nucleobases in 12 batches of natural Cordyceps samples that were collected from different regions in China. The developed HILIC-ESI-MS method exhibited clear advantages in identifying and determining highly polar bioactive components in Cordyceps, as well as their quality control.
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Affiliation(s)
- Heng-Qiang Zhao
- Shandong Analysis and Test Center, Shandong Academy of Sciences, Jinan 250014, Shangdong, China
| | - Xiao Wang
- Shandong Analysis and Test Center, Shandong Academy of Sciences, Jinan 250014, Shangdong, China
- National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Hong-Mei Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Bin Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Hong-Jun Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Luqi Huang
- National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
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25
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Separation and analysis of cis-diol-containing compounds by boronate affinity-assisted micellar electrokinetic chromatography. Anal Bioanal Chem 2013; 405:8579-86. [PMID: 23907689 DOI: 10.1007/s00216-013-7256-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 07/09/2013] [Accepted: 07/12/2013] [Indexed: 01/28/2023]
Abstract
Cis-diol-containing compounds (CDCCs) are usually highly hydrophilic compounds and are therefore difficult to separate by conventional reversed-phase-based micellar electrokinetic chromatography (MEKC) due to poor selectivity. Here, we report a new method, called boronate affinity-assisted micellar electrokinetic chromatography (BAA-MEKC), to solve this issue. A boronic acid with a hydrophobic alkyl chain was added to the background electrolyte, which acted as a modifier to adjust the selectivity. CDCCs can covalently react with the boronic acid to form negatively charged surfactant-like complexes, which can partition into micelles formed with a cationic surfactant. Thus, CDCCs can be separated according to the differential partition constants of their boronic acid complexes between the micellar phase and the surrounding aqueous phase. To verify this method, eight nucleosides were employed as the test compounds and their separation confirmed that the combination of boronate affinity interaction with MEKC can effectively enhance the separation of CDCCs. The effects of experimental conditions on the separation were investigated. Finally, the BAA-MEKC method was applied to the separation and analysis of nucleosides extracted from human urine. BAA-MEKC exhibited better selectivity and improved separation as compared with conventional MEKC and CZE. Successful quantitative analysis of urinary nucleosides by BAA-MEKC was demonstrated.
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26
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Zhao Y, Gou XJ, Dai JY, Peng JH, Feng Q, Sun SJ, Cao HJ, Zheng NN, Fang JW, Jiang J, Su SB, Liu P, Hu YY, Zhang YY. Differences in metabolites of different tongue coatings in patients with chronic hepatitis B. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2013; 2013:204908. [PMID: 23690837 PMCID: PMC3652181 DOI: 10.1155/2013/204908] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 03/22/2013] [Accepted: 03/27/2013] [Indexed: 12/15/2022]
Abstract
Tongue coating is one of the important foundations of tongue diagnosis in traditional Chinese medicine (TCM) and plays an important role in reflecting the occurrence, development, and prognosis of the disease. However, its material basis is still poorly understood. In this study, a urinary metabonomic method based on gas chromatography coupled to mass spectrometry (GC/MS) was developed. The distinct clustering in metabolic profile was observed from Group A (thick yellow coating in patients with chronic hepatitis B), Group B (thick white coating in patients with chronic hepatitis B), and Group C (thin white coating with healthy humans) using orthogonal projections to latent structures (OPLS). Based on the variable of importance in the project (VIP) values, some significantly changed metabolites have been identified. These changes were related to the disturbance in energy metabolism, amino acid metabolism, nucleotide metabolism, and gut microflora, which were helpful to understand the material basis leading to the formation of tongue coating. This study demonstrated that tongue coating may have an objective material basis.
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Affiliation(s)
- Yu Zhao
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
| | - Xiao-jun Gou
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
| | - Jian-ye Dai
- Center for Traditional Chinese Medicine and Systems Biology of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong District, Shanghai 201203, China
| | - Jing-hua Peng
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
| | - Qin Feng
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
| | - Shu-jun Sun
- Center for Traditional Chinese Medicine and Systems Biology of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong District, Shanghai 201203, China
| | - Hui-juan Cao
- Center for Traditional Chinese Medicine and Systems Biology of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong District, Shanghai 201203, China
| | - Ning-ning Zheng
- Center for Traditional Chinese Medicine and Systems Biology of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong District, Shanghai 201203, China
| | - Jun-wei Fang
- Center for Traditional Chinese Medicine and Systems Biology of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong District, Shanghai 201203, China
| | - Jian Jiang
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
| | - Shi-bing Su
- E-Institute of Shanghai Municipal Education Commission, Shanghai 201203, China
| | - Ping Liu
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
- E-Institute of Shanghai Municipal Education Commission, Shanghai 201203, China
| | - Yi-yang Hu
- Institute of Liver Disease, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 258 Zhangheng Road, Pudong District, Shanghai 201203, China
- E-Institute of Shanghai Municipal Education Commission, Shanghai 201203, China
| | - Yong-yu Zhang
- Center for Traditional Chinese Medicine and Systems Biology of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong District, Shanghai 201203, China
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27
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Contreras-Sanz A, Scott-Ward TS, Gill HS, Jacoby JC, Birch RE, Malone-Lee J, Taylor KMG, Peppiatt-Wildman CM, Wildman SSP. Simultaneous quantification of 12 different nucleotides and nucleosides released from renal epithelium and in human urine samples using ion-pair reversed-phase HPLC. Purinergic Signal 2012; 8:741-51. [PMID: 22707011 PMCID: PMC3486167 DOI: 10.1007/s11302-012-9321-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 05/29/2012] [Indexed: 02/07/2023] Open
Abstract
Nucleotides and nucleosides are not only involved in cellular metabolism but also act extracellularly via P1 and P2 receptors, to elicit a wide variety of physiological and pathophysiological responses through paracrine and autocrine signalling pathways. For the first time, we have used an ion-pair reversed-phase high-performance liquid chromatography ultraviolet (UV)-coupled method to rapidly and simultaneously quantify 12 different nucleotides and nucleosides (adenosine triphosphate, adenosine diphosphate, adenosine monophosphate, adenosine, uridine triphosphate, uridine diphosphate, uridine monophosphate, uridine, guanosine triphosphate, guanosine diphosphate, guanosine monophosphate, guanosine): (1) released from a mouse renal cell line (M1 cortical collecting duct) and (2) in human biological samples (i.e., urine). To facilitate analysis of urine samples, a solid-phase extraction step was incorporated (overall recovery rate ≥ 98 %). All samples were analyzed following injection (100 μl) into a Synergi Polar-RP 80 Å (250 × 4.6 mm) reversed-phase column with a particle size of 10 μm, protected with a guard column. A gradient elution profile was run with a mobile phase (phosphate buffer plus ion-pairing agent tetrabutylammonium hydrogen sulfate; pH 6) in 2-30 % acetonitrile (v/v) for 35 min (including equilibration time) at 1 ml min(-1) flow rate. Eluted compounds were detected by UV absorbance at 254 nm and quantified using standard curves for nucleotide and nucleoside mixtures of known concentration. Following validation (specificity, linearity, limits of detection and quantitation, system precision, accuracy, and intermediate precision parameters), this protocol was successfully and reproducibly used to quantify picomolar to nanomolar concentrations of nucleosides and nucleotides in isotonic and hypotonic cell buffers that transiently bathed M1 cells, and urine samples from normal subjects and overactive bladder patients.
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Studzińska S, Buszewski B. A new way to fast and high resolution determination of modified nucleosides. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 887-888:93-101. [DOI: 10.1016/j.jchromb.2012.01.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/16/2012] [Accepted: 01/17/2012] [Indexed: 11/30/2022]
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Pitakpornpreecha T, Plubrukarn A, Wititsuwannakul R. Quantification of 5'-deoxy-5'-methylthioadenosine in heat-treated natural rubber latex serum. PHYTOCHEMICAL ANALYSIS : PCA 2012; 23:12-15. [PMID: 21538640 DOI: 10.1002/pca.1319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2010] [Revised: 12/30/2010] [Accepted: 01/06/2011] [Indexed: 05/30/2023]
Abstract
INTRODUCTION 5'-Deoxy-5'-methylthioadenosine (MTA) is one of the biologically active components found in natural rubber latex (NRL) serum, a common waste product from rubber plantations. In this study the contents of MTA in heat-treated NRL serum were measured in order to assess the potential of the serum as an alternative source of MTA. OBJECTIVE To devise an HPLC/UV-based quantitative analytical protocol for the determination of MTA, and to determine the effect of heat treatment on the content of MTA in NRL serum from various sources. METHODOLOGY An HPLC/UV-based determination of MTA using an acidic eluant was devised and validated. In the heat treatment, the effect of refluxing times on MTA liberation was evaluated. RESULTS The quantification protocol was validated with satisfying linearity, limits of detection and quantitation, precisions for peak areas and recovery percentages from intra- and inter-day operations. The amounts of MTA in the NRL sera from various sources increased with heat treatment to yield 5-12 μg MTA/mL of serum. CONCLUSION The devised protocol was found to be satisfyingly applicable to the routine determination of MTA in NRL serum. The effect of heat treatment on the content of MTA also indicated another possible use for NRL serum, normally discarded in vast amounts by the rubber industry, as an alternative source of MTA.
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Hui Y, Zhao SS, Love JA, Ansley DM, Chen DDY. Development and application of a LC-MS/MS method to quantify basal adenosine concentration in human plasma from patients undergoing on-pump CABG surgery. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 885-886:30-6. [PMID: 22226467 DOI: 10.1016/j.jchromb.2011.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 11/25/2011] [Accepted: 12/06/2011] [Indexed: 10/14/2022]
Abstract
A sensitive and robust LC-MS/MS method was developed to quantify basal adenosine concentrations in human plasma of patients undergoing on-pump coronary artery bypass grafting (CABG) surgery. A strong cation exchange (SCX) monolithic cartridge was used to enrich analyte, improve robustness, and reduce biological complexity. A simple modifier-free mobile phase was employed to improve sensitivity and reproducibility. This method exhibits consistent precision and accuracy, and the RSDs or REs of all the intraday and interday determinations were within 10%. The calibration curve was linear across the examined dynamic range from 1nM to 500nM (r(2)=0.996). LOD and LOQ were determined to be 0.257nM and 0.857nM respectively, while LLOQ was below 10nM. This method was used to monitor changes of adenosine levels in patient plasma drawn intraoperatively during on-pump CABG surgery. The analysis of 84 patients revealed that the mean concentration of adenosine in coronary sinus plasma after cardiopulmonary bypass (CPB) is higher than that in coronary sinus before CPB (p=0.0024; two-tailed t-test) and that in radial artery plasma after CPB (p=0.0409; two-tailed t-test). These findings suggest that the equilibrium between adenosine production and elimination has favored the elevation of adenosine basal level during on-pump CABG surgery and the change is specific to heart tissues. Evaluation of adenosine with a sensitive and robust analytical method has important implications on providing consistent results and meaningful insights into adenosine regulation, as well as its steady state and sustained action on the heart. Relating patient characteristics or clinical outcomes with basal adenosine concentration can be used to optimize the CABG-CPB maneuver by regulating adenosine level via pharmacological intervention, and differentiating adenosine's contribution to cardioprotection from other modulatory factors.
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Affiliation(s)
- Yu Hui
- Department of Chemistry, University of British Colombia, Vancouver, BC, Canada
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Badruddoza AZM, Junwen L, Hidajat K, Uddin MS. Selective recognition and separation of nucleosides using carboxymethyl-β-cyclodextrin functionalized hybrid magnetic nanoparticles. Colloids Surf B Biointerfaces 2011; 92:223-31. [PMID: 22177539 DOI: 10.1016/j.colsurfb.2011.11.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 11/24/2011] [Accepted: 11/24/2011] [Indexed: 01/03/2023]
Abstract
A novel magnetic nanoadsorbent (CMCD-APTS-MNPs) containing the superparamagnetic and molecular recognition properties was synthesized by grafting carboxymethyl-β-cyclodextrin (CM-β-CD) on 3-aminopropyltriethoxysile (APTS) modified Fe(3)O(4) nanoparticles. The feasibility of using CMCD-APTS-MNPs as magnetic nanoadsorbent for selective adsorption of adenosine (A) and guanosine (G) based on inclusion and molecular recognition was demonstrated. The as-synthesized magnetic nanoparticles were characterized by TEM, FTIR and TGA analyses. The effects of pH and initial nucleoside concentrations on the adsorption behavior were studied. The complexation of CMCD-APTS-MNPs with both nucleosides was found to follow the Langmuir adsorption isotherm. The CMCD-APTS-MNPs showed a higher adsorption ability and selectivity for G than A under identical experimental conditions, which results from the ability of selective binding and recognition of the immobilized CM-β-CD towards G. The driving force of the separation between G and A is through the different weak interaction with grafted CM-β-CD, i.e., hydrogen bond interaction, which is evidenced by different inclusion equilibrium constants and FTIR analyses of inclusion complexes between grafted cyclodextrin and the guest molecules. Our results indicated that this nanoadsorbent would be a promising tool for easy, fast and selective separation, analysis of nucleosides and nucleotides in biological samples.
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Affiliation(s)
- A Z M Badruddoza
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
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Montenegro Álvarez de Tejera P, Cabanes-Mariscal M, Gutiérrez-Ortega C, Medina Font J, Villa-Corbatón M, Gómez de Terreros J. Catabolismo muscular en pacientes con enfermedad pulmonar obstructiva crónica. Rev Clin Esp 2011; 211:511-6. [DOI: 10.1016/j.rce.2011.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 06/01/2011] [Accepted: 06/05/2011] [Indexed: 11/27/2022]
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Teichert F, Winkler S, Keun HC, Steward WP, Gescher AJ, Farmer PB, Singh R. Evaluation of urinary ribonucleoside profiling for clinical biomarker discovery using constant neutral loss scanning liquid chromatography/tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:2071-2082. [PMID: 21698690 DOI: 10.1002/rcm.5086] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The patterns and levels of urinary excreted ribonucleosides which reflect RNA turnover and metabolism in humans offer the potential for early detection of disease and monitoring of therapeutic intervention. A liquid chromatography/tandem mass spectrometry (LC/MS/MS) method employing constant neutral loss (CNL) scanning for the loss of the ribose moiety (132 u) was used to detect ribonucleosides in human urine and to evaluate this analytical platform for biomarker research in clinical trials. Ribonucleosides were stable and not influenced by the time spent at room temperature prior to freezing or long-term storage at -80 °C. Matrix effects caused variation in the mass spectrometer response which was dependent on the concentration of the analysed urine sample. For the use of urinary ribonucleoside profiling in clinical biomarker studies, adjustment of the urine samples to a common concentration prior to sample preparation is therefore advocated. Changes in the mass spectrometer response should be accounted for by the use of an internal standard added after sample preparation. Diurnal variation exceeded inter-day variation of an individual's ribonucleoside profile, but inter-person differences were predominant and allowed the separation of individuals against each other in a multivariate space. Due to considerable diurnal variation the use of spot urine samples would introduce unnecessary variation and should be replaced by the collection of multiple spot urine samples across the day, where possible. Should such a protocol not be feasible, biological intra-day and inter-day variation must be considered and accounted for in the data interpretation.
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Affiliation(s)
- Friederike Teichert
- Cancer Biomarkers and Prevention Group, Biocentre, Department of Cancer Studies and Molecular Medicine, University of Leicester, University Road, Leicester LE1 7RH, UK.
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Siebenberg S, Kaysser L, Wemakor E, Heide L, Gust B, Kammerer B. Identification and structural elucidation of new caprazamycins from Streptomyces sp. MK730-62F2 by liquid chromatography/electrospray ionization tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:495-502. [PMID: 21259358 DOI: 10.1002/rcm.4889] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The development of reliable analytic methods, capable of separating mixtures of secondary metabolites as well as providing structural information, is essential for the investigation of secondary metabolites, e.g. from Streptomyces. Here we report a liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) method using a triple quadrupole mass analyzer for the structural elucidation of caprazamycins and liposidomycins from culture extracts of the wild-type producer strains. Comparison of the fragmentation patterns in positive as well as in negative ionization mode revealed several characteristic product ions used for identification of six new caprazamycins. Furthermore, a chromatographic method for the purification of nucleosides from cell cultures using a boronic acid gel was adapted for the partial purification of the culture extracts.
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Affiliation(s)
- Stefanie Siebenberg
- Pharmazeutisches Institut, Eberhard Karls-Universität Tübingen, 72076 Tübingen, Germany
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Wang P, Sun H, Lv H, Sun W, Yuan Y, Han Y, Wang D, Zhang A, Wang X. Thyroxine and reserpine-induced changes in metabolic profiles of rat urine and the therapeutic effect of Liu Wei Di Huang Wan detected by UPLC-HDMS. J Pharm Biomed Anal 2010; 53:631-45. [DOI: 10.1016/j.jpba.2010.04.032] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 04/25/2010] [Accepted: 04/26/2010] [Indexed: 12/28/2022]
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Jiang Y, Ma Y. A fast capillary electrophoresis method for separation and quantification of modified nucleosides in urinary samples. Anal Chem 2010; 81:6474-80. [PMID: 19552424 DOI: 10.1021/ac901216n] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Modified nucleosides are formed at the post-transcriptional stage by chemical modification of normal nucleosides within the ribonucleic acid (RNA). These modified nucleosides cannot be reutilized or further degraded, but they are excreted in the urine as intact molecules. The elevated levels of modified nucleosides in the urine samples have served as potential cancer biomarkers in many studies. Although different analytical techniques have been reported for determining nucleosides levels, they are practically difficult to use as a routine tool for early cancer screening. In this paper, a novel method was developed to separate and quantify 10 nucleosides--adenosine, cytidine, guanosine, uridine, inosine, xanthosine, pseudouridine, N(2)-methylguanosine, 1-methyladenosine, and N(2),N(2)-dimethylguanosine--in urine samples using capillary electrophoresis with an ultraviolet (UV) detector (abbreviated as CE-UV) at a wavelength of 254 nm. A 50 microm (i.d.) x 38 cm (effective length) fused silica capillary was used for the separation, and a borate-phosphate buffer containing 25 mM cetyltrimethylammonium bromide (CTAB) at pH 9.50 was used as a background electrolyte. The separation was performed at 15 kV under reverse polarity and completed within 10 min. The linear range of the analytes was 5.0-500 micromol/L, and the limit of detection was <2.0 micromol/L. The effects of pH, buffer concentrations, CTAB concentration, and the operation voltages on the separation and quantification of the modified nucleosides were also investigated. The technique developed in this study is much simpler and faster, compared to previous studies, and can be used to quantify modified nucleosides in urine samples.
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Affiliation(s)
- Yongqing Jiang
- Department of Chemistry and Environmental Research Center, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
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Van Dycke A, Verstraete A, Pil K, Raedt R, Vonck K, Boison D, Boon P. Quantitative analysis of adenosine using liquid chromatography/atmospheric pressure chemical ionization-tandem mass spectrometry (LC/APCI-MS/MS). J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:1493-8. [PMID: 20409760 PMCID: PMC2987626 DOI: 10.1016/j.jchromb.2010.03.047] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Revised: 02/21/2010] [Accepted: 03/28/2010] [Indexed: 12/22/2022]
Abstract
Adenosine-secreting cellular brain implants constitute a promising therapeutic approach for the treatment of epilepsy. To engineer neural stem cells for therapeutic adenosine delivery, a reliable and fast analytical method is necessary to quantify cell-based adenosine release. Here we describe the development, optimization and validation of adenosine measurement using liquid chromatography-atmospheric pressure chemical ionization-tandem mass spectrometry (LC-APCI-MS/MS). LC-MS/MS in positive ion mode used selected reaction monitoring at m/z of 268.2/136.1 and 302.2/170.0 for adenosine and the internal standard, respectively. The bias was within 15% of the nominal value and evaluation of precision showed a relative standard deviation lower than 15% for all measured concentrations. The lower limit of quantification of adenosine was 15.6 ng/ml. Freeze and thaw stability and processed sample stability also fulfilled the acceptance criteria. Evaluation of the matrix effect showed that the method is not affected by relative matrix effects. The major advantages of this method are the absence of an extraction phase and the combination of the high selectivity and sensitivity characteristic for the LC-MS/MS technique, with a short run time of 4.5 min. These results demonstrate that this method is a useful tool to measure adenosine concentrations in culture medium released from stem cells in vitro.
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Affiliation(s)
- Annelies Van Dycke
- Laboratory for Clinical and Experimental Neurophysiology, Department of Neurology, Ghent University Hospital, Ghent, Belgium.
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HOU S, DING M. Simultaneous Separation and Determination of Eleven Nucleosides and Bases in Beer, Herring Sperm DNA and RNA Soft Capsule by High-Performance Liquid Chromatography. ANAL SCI 2010; 26:1111-4. [DOI: 10.2116/analsci.26.1111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Shengjie HOU
- Key Lab of Bioorganic Phosphorus Chemistry & Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University
| | - Mingyu DING
- Key Lab of Bioorganic Phosphorus Chemistry & Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University
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Cataldi TRI, Bianco G, Abate S, Mattia D. Analysis of S-adenosylmethionine and related sulfur metabolites in bacterial isolates of Pseudomonas aeruginosa (BAA-47) by liquid chromatography/electrospray ionization coupled to a hybrid linear quadrupole ion trap and Fourier transform ion cyclotron resonance mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2009; 23:3465-3477. [PMID: 19813285 DOI: 10.1002/rcm.4274] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A comprehensive and highly selective method for detecting in bacterial supernatants a modified sulfur nucleoside, S-adenosyl-L-methionine (SAM), and its metabolites, i.e., S-adenosylhomocysteine (SAH), adenosine (Ado), 5'-deoxy-5'-methylthioadenosine (MTA), adenine (Ade), S-adenosyl-methioninamine (dcSAM), homocysteine (Hcy) and methionine (Met), was developed. The method is based on reversed-phase liquid chromatography with positive electrospray ionization (ESI+) coupled to a hybrid linear quadrupole ion trap (LTQ) and 7-T Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS). A gradient elution was employed with a binary solvent of 0.05 M ammonium formate at pH 4 and acetonitrile. The assay involves a simultaneous cleanup of cell-free bacterial broths by solid-phase extraction and trace enrichment of metabolites with a 50-fold concentration factor by using immobilized phenylboronic and anion-exchange cartridges. While the quantitative determination of SAM was performed using stable-isotope-labeled SAM-d3 as an internal standard, in the case of Met and Ade, Met-13C and Ade-15N2 were employed as isotope-labeled internal standards, respectively. This method enabled the identification of SAM and its metabolites in cell-free culture of Pseudomonas aeruginosa grown in Davis minimal broth (formulation without sulphur organic compounds), with routine sub-ppm mass accuracies (-0.27 +/- 0.68 ppm). The resulting contents of S(C)S(S)-SAM, S(S)-dcSAM, MTA, Ado and Met in the free-cell supernatant of P. aeruginosa was 56.4 +/- 2.1 nM, 32.2 +/- 2.2 nM, 0.91 +/- 0.10 nM, 19.6 +/- 1.2 nM and 1.93 +/- 0.02 microM (mean +/- SD, n = 4 extractions), respectively. We report also the baseline separation (Rs > or = 1.5) of both diastereoisomeric forms of SAM (S(C)S(S) and S(C)R(S)) and dcSAM (S(S) and R(S)), which can be very useful to establish the relationship between the biologically active versus the inactive species, S(C)S(S)/S(C)R(S) and S(S)/R(S) of SAM and dcSAM, respectively. An additional confirmation of SAM-related metabolites was accomplished by a systematic study of their MS/MS spectra.
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Affiliation(s)
- Tommaso R I Cataldi
- Dipartimento di Chimica, Università degli Studi di Bari, Campus Universitario, Via E. Orabona 4, 70126 Bari, Italy.
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Analysis of urinary nucleosides as potential tumor markers in human colorectal cancer by high performance liquid chromatography/electrospray ionization tandem mass spectrometry. Clin Chim Acta 2008; 402:31-7. [PMID: 19135043 DOI: 10.1016/j.cca.2008.12.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2008] [Revised: 12/03/2008] [Accepted: 12/03/2008] [Indexed: 02/07/2023]
Abstract
BACKGROUND Increased levels of modified nucleosides have been observed in urine from patients suffering from several cancers. In this study, we evaluated whether urinary nucleosides can serve as potential tumor markers for colorectal cancer by high performance liquid chromatography-electrospray/tandem mass spectrometry (HPLC/ESI-MS/MS). METHODS A simple and specific method based on HPLC/ESI-MS/MS was developed to determine the urinary nucleosides from patients with colorectal cancer. We studied the excretion patterns of nucleosides in urine from 26 patients with colorectal cancer and 18 healthy controls. RESULTS The LC/MS/MS approach with selective reaction monitoring (SRM) allowed for the sensitive determination of nucleosides in human urine samples with colorectal cancer. The mean levels of 5 urinary nucleosides (adenosine, cytidine, N(2),N(2)-dimethylguanine, 8-hydroxy-2'-deoxyguanosine and uridine) were significantly higher in the patients with colorectal cancer than in the healthy adults. CONCLUSIONS The results indicate that urinary nucleosides determined by LC/MS/MS may be useful as biological markers for colorectal cancer. Our findings suggest that LC/MS/MS is a highly specific and sensitive method for rapidly screening a large number of nucleoside that may be useful as markers for cancer in humans.
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Frickenschmidt A, Fröhlich H, Bullinger D, Zell A, Laufer S, Gleiter CH, Liebich H, Kammerer B. Metabonomics in cancer diagnosis: mass spectrometry-based profiling of urinary nucleosides from breast cancer patients. Biomarkers 2008; 13:435-49. [DOI: 10.1080/13547500802012858] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Li HY, Wang SM, Liu HM, Li J, Han D, Bu SS, Zhang MZ. Analysis of modified nucleosides in the urine of patients with malignant cancer by liquid chromatography/electrospray ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2008; 22:3161-3171. [PMID: 18798199 DOI: 10.1002/rcm.3721] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
As modified nucleosides reflect altered tRNA turnover which seems to be impaired in the body of cancer patients, they have been evaluated as potential tumor markers. High-performance liquid chromatography/electrosprary ionization quadrupole time-of-flight mass spectrometry (HPLC/ESI-Q-TOFMS) was used to identify nucleosides purified from urine in positive ionization mode. Potential nucleosides were assessed by their evident UV absorbance in HPLC and then further examined by mass spectrometric techniques. In this manner, 21 nucleosides were detected in the urine of a patient with lymphoid cancer including three modified nucleosides 5'-dehydro-2-deoxyinosine, N1,N2,N7-trimethylguanosine and N1-methyl-N2-ethylguanosine, which had never been reported previously.
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Affiliation(s)
- Hua-Yu Li
- Department of Chemistry, Zhengzhou University, 100 Science Road, 450001 Zhengzhou, China
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Bullinger D, Fux R, Nicholson G, Plontke S, Belka C, Laufer S, Gleiter CH, Kammerer B. Identification of urinary modified nucleosides and ribosylated metabolites in humans via combined ESI-FTICR MS and ESI-IT MS analysis. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:1500-1513. [PMID: 18657436 DOI: 10.1016/j.jasms.2008.06.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Revised: 06/19/2008] [Accepted: 06/20/2008] [Indexed: 05/26/2023]
Abstract
The physiological response of the human body to several diseases can be reflected by the metabolite pattern in biological fluids. Cancer, like other diseases accompanied by metabolic disorders, causes characteristic effects on cell turnover rate, activity of modifying enzymes, and RNA/DNA modifications. This results in an altered excretion of modified nucleosides and biochemically related compounds. In the course of our metabolic profiling project, we screened 24-h urine of patients suffering from lung, rectal, or head and neck cancer for previously unknown ribosylated metabolites. Therefore, we developed a sample preparation procedure based on boronate affinity chromatography followed by additional prepurification with preparative TLC. The isolated metabolites were analyzed by ion trap mass spectrometry (IT MS) and Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS). IT MS was applied for LC-auto MS(3) screening runs and MS(n(n=4-6)) syringe pump infusion experiments, yielding characteristic fragmentation patterns. FTICR MS measurements enabled the calculation of corresponding molecular formulae based on accurate mass determination (mass accuracy: 1-5 ppm for external and sub-ppm values for internal calibration). We were able to identify 22 metabolites deriving from cellular RNA metabolism and related metabolic pathways like histidine metabolism, purine biosynthesis, methionine/polyamine cycle, and nicotinate/nicotinamide metabolism. The compounds 1-ribosyl-3-hydroxypyridinium, 1-ribosyl-pyridinium, and 3-ribosyl-1-methyl-l-histidinium as well as a series of ribosylated histamines, conjugated to carboxylic acids at the N(omega)-position were found as novel urinary constituents. The occurrence of the modified nucleosides 2-methylthio-N(6)-(cis-hydroxyisopentenyl)-adenosine, 5-methoxycarbonylmethyl-2-thiouridine, N(6)-methyl-N(6)-threonylcarbamoyladenosine, and 2-methylthio-N(6)-threonylcarbamoyladenosine in human urine is verified for the first time.
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Affiliation(s)
- Dino Bullinger
- Department of Clinical Pharmacology, Institute of Pharmacology and Toxicology, University Hospital Tübingen, Tübingen, Germany
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Bullinger D, Fröhlich H, Klaus F, Neubauer H, Frickenschmidt A, Henneges C, Zell A, Laufer S, Gleiter CH, Liebich H, Kammerer B. Bioinformatical evaluation of modified nucleosides as biomedical markers in diagnosis of breast cancer. Anal Chim Acta 2008; 618:29-34. [DOI: 10.1016/j.aca.2008.04.048] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Revised: 04/17/2008] [Accepted: 04/18/2008] [Indexed: 11/28/2022]
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Metabolic signature of breast cancer cell line MCF-7: profiling of modified nucleosides via LC-IT MS coupling. BMC BIOCHEMISTRY 2007; 8:25. [PMID: 18047657 PMCID: PMC2219991 DOI: 10.1186/1471-2091-8-25] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Accepted: 11/29/2007] [Indexed: 11/22/2022]
Abstract
Background Cancer, like other diseases accompanied by strong metabolic disorders, shows characteristic effects on cell turnover rate, activity of modifying enzymes and DNA/RNA modifications, resulting also in elevated amounts of excreted modified nucleosides. For a better understanding of the impaired RNA metabolism in breast cancer cells, we screened these metabolites in the cell culture supernatants of the breast cancer cell line MCF-7 and compared it to the human mammary epithelial cells MCF-10A. The nucleosides were isolated and analyzed via 2D-chromatographic techniques: In the first dimension by cis-diol specific boronate affinity extraction and subsequently by reversed phase chromatography coupled to an ion trap mass spectrometer. Results Besides the determination of ribonucleosides, additional compounds with cis-diol structure, deriving from cross-linked biochemical pathways, like purine-, histidine- and polyamine metabolism were detected. In total, 36 metabolites were identified by comparison of fragmentation patterns and retention time. Relation to the internal standard isoguanosine yielded normalized area ratios for each identified compound and enabled a semi-quantitative metabolic signature of both analyzed cell lines. 13 of the identified 26 modified ribonucleosides were elevated in the cell culture supernatants of MCF-7 cells, with 5-methyluridine, N2,N2,7-trimethylguanosine, N6-methyl-N6-threonylcarbamoyladenosine and 3-(3-aminocarboxypropyl)-uridine showing the most significant differences. 1-ribosylimidazole-4-acetic acid, a histamine metabolite, was solely found in the supernatants of MCF-10A cells, whereas 1-ribosyl-4-carboxamido-5-aminoimidazole and S-adenosylmethionine occurred only in supernatants of MCF-7 cells. Conclusion The obtained results are discussed against the background of pathological changes in cell metabolism, resulting in new perspectives for modified nucleosides and related metabolites as possible biomedical markers for breast carcinoma in vivo.
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Szymańska E, Markuszewski MJ, Bodzioch K, Kaliszan R. Development and validation of urinary nucleosides and creatinine assay by capillary electrophoresis with solid phase extraction. J Pharm Biomed Anal 2007; 44:1118-26. [PMID: 17590562 DOI: 10.1016/j.jpba.2007.05.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2007] [Revised: 05/06/2007] [Accepted: 05/09/2007] [Indexed: 11/17/2022]
Abstract
For the analysis of metabolite nucleoside profiles, capillary electrophoretic (CE) methods preceded by appropriate solid phase extraction procedures have been developed. The approach has been proposed for the determination of 13 nucleosides and creatinine in human urine. A background solution composed of 100 mM borate-72 mM phosphate-160 mM SDS and a fused silica capillary of 70 cm length to detector and 50 microm i.d. were used. The methods developed were statistically validated for their linearity, trueness, precision and selectivity. Stability of the analyzed nucleoside profiles in urine during storage was checked. Validation parameters of solid phase extraction procedures for urinary nucleosides were evaluated. The developed analytical methods were employed for the analysis of 22 urine samples from healthy patients and cancer patients from the urological ward. Nucleoside profiles were compared among the subjects. It was proved that the methods proposed were suitable for a fast and reliable determination of urinary creatinine and modified nucleoside profiles, which can be further submitted for the metabonomic analysis of cancer patients.
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Affiliation(s)
- Ewa Szymańska
- Department of Biopharmaceutics and Pharmacodynamics, Medical University of Gdańsk, Gen. J. Hallera 107, 80-416 Gdańsk, Poland
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Seidel P, Seidel A, Herbarth O. Multilayer perceptron tumour diagnosis based on chromatography analysis of urinary nucleosides. Neural Netw 2007; 20:646-51. [PMID: 17275256 DOI: 10.1016/j.neunet.2006.12.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Nucleosides in human urine are of interest as a biochemical marker for cancer, acquired immune deficiency syndrome (AIDS) and the whole-body turnover of RNAs. A reversed-phase high-performance liquid chromatography (RP-HPLC) method with photodiode-array detection was used to quantitatively analyze urinary normal and modified nucleosides. 55 persons with malignant tumors of various types, 13 persons with benign tumors and 41 healthy controls were investigated within a clinical intervention study. Artificial neural networks (ANN) have been used as a practical pattern recognition tool to distinguish cancer patients from healthy persons. Using a multilayer perceptron (MPL), a specificity of 85%, and a sensitivity of 97% in differentiation between tumor patients and healthy persons was achieved. The differentiation between benign and malignant tumors had a sensitivity of 60% and a specificity of 84%. These results verify the usefulness of ANN and the RP-HPLC method for tumor recognition in agreement with existing studies.
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Affiliation(s)
- P Seidel
- Institute of Medical Physics and Biophysics, Medical Faculty, University of Leipzig, Germany.
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Zhao X, Wang W, Wang J, Yang J, Xu G. Urinary profiling investigation of metabolites withcis-diol structure from cancer patients based on UPLC-MS and HPLC-MS as well as multivariate statistical analysis. J Sep Sci 2006; 29:2444-51. [PMID: 17154124 DOI: 10.1002/jssc.200600157] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Nucleosides are an important class of metabolites and have been investigated as potential tumor biomarkers. A method based on ultra peerformance liquid chromatography (UPLC)-TOF MS was developed to analyze urinary nucleosides and other metabolites with cis-diol structure to distinguish between cancer patients and healthy persons and compare the results with those obtained by HPLC. The data showed that the UPLC method used about one third of the time required by HPLC and achieved a much better chromatographic resolution and increased sensitivity, the number of peaks detected by UV being 79 and 94 for HPLC and UPLC, respectively. With UPLC-TOF MS, more information was obtained about metabolites, the separation of cancer patients from healthy persons was significantly improved, and more potential biomarkers were found. The method based on UPLC-TOF MS is a powerful technique for the study of metabolite profiles.
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Affiliation(s)
- Xinjie Zhao
- Dalian Institute of Chemical Physics, the Chinese Academy of Sciences, Dalian, Liaoning Province, P. R. China
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Kowalska S, Krupczyńska K, Buszewski B. The influence of the mobile phase pH and the stationary phase type on the selectivity tuning in high performance liquid chromatography nucleosides separation. J Sep Sci 2006; 28:1502-11. [PMID: 16158992 DOI: 10.1002/jssc.200400044] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Analysis of the modified nucleosides is particularly important in the medical area because of a possibility of cancerogenic processes studies. The aim of this work was to study the selectivity tuning of modified nucleosides through the investigations of interactions analyte (modified nucleoside) <==> stationary phase <==> mobile phase. A series of homemade stationary phases with different surface properties has been utilized. All of them contain various interaction sites such as: cholesterol (SG-CHOL); n-acylamide (SG-CHOL, SG-AP); aminopropyl (SG-CHOL, SG-AP, SG-NH2, SG-MIX); cyanopropyl, phenyl, octyl (SG-MIX), octadecyl (SG-MIX, SG-C18) and silanols localized on the silica gel surface of all packings. The attempt to predict the main interactions responsible for the retention between nucleosides and stationary phase ligands was done on the basis of the elemental analysis, and proportional part of an individual ligand bonded to silica surface results. In order to study the influence of different packing types on the analyzed nucleosides retention, the relationship between pH of the mobile phase buffer and the selectivity of a stationary phase was investigated.
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Affiliation(s)
- Sylwia Kowalska
- Department of Environmental Chemistry and Ecoanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
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Zheng YF, Yang J, Zhao XJ, Feng B, Kong HW, Chen YJ, Lv S, Zheng MH, Xu GW. Urinary nucleosides as biological markers for patients with colorectal cancer. World J Gastroenterol 2005; 11:3871-6. [PMID: 15991285 PMCID: PMC4504888 DOI: 10.3748/wjg.v11.i25.3871] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: Fourteen urinary nucleosides, primary degradation products of tRNA, were evaluated to know the potential as biological markers for patients with colorectal cancer.
METHODS: The concentrations of 14 kinds of urinary nucleosides from 52 patients with colorectal cancer, 10 patients with intestinal villous adenoma and 60 healthy adults were determined by column switching high performance liquid chromatography method.
RESULTS: The mean levels of 12 kinds of urinary nucleosides (except uridine and guanosine) in the patients with colorectal cancer were significantly higher than those in patients with intestinal villous adenoma or the healthy adults. Using the levels of 14 kinds of urinary nucleosides as the data vectors for principal component analysis, 71% (37/52) patients with colorectal cancer were correctly classified from healthy adults, in which the identification rate was much higher than that of CEA method (29%). Only 10% (1/10) of patients with intestinal villous adenoma were indistinguishable from patients with colorectal cancer. The levels of m1G, Pseu and m1A were positively related with tumor size and Duke’s stages of colorectal cancer. When monitoring the changes in urinary nucleoside concentrations of patients with colorectal cancer associated with surgery, it was found that the overall correlations with clinical assessment were 84% (27/32) and 91% (10/11) in response group and progressive group, respectively.
CONCLUSION: These findings indicate that urinary nucleosides determined by column switching high performance liquid chromatography method may be useful as biological markers for colorectal cancer.
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Affiliation(s)
- Yu-Fang Zheng
- National Chromatographic R and A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, China
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