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Feng J, Dong L, Wang H, Xie Y, Wang H, Ding L, Song G, Zhang J, Li T, Shen Q, Zhang Y. Application of aptamer-conjugated graphene oxide for specific enrichment of microcystin-LR in Achatina fulica prior to matrix-assisted laser desorption ionization mass spectrometry. Electrophoresis 2024; 45:275-287. [PMID: 37768831 DOI: 10.1002/elps.202300107] [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: 05/16/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 09/30/2023]
Abstract
Microcystin-LR (MC-LR), as a hepatotoxin, can cause liver swelling, hepatitis, and even liver cancer. In this study, MC-LR aptamer (Apt-3) modified graphene oxide (GO) was designed to enrich MC-LR in white jade snail (Achatina fulica) and pond water, followed by matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) analysis. Results indicated that the Apt-3/PEG/GO nanocomposites were highly specific to MC-LR, and the detection limit of MALDI-MS was 0.50 ng/mL. Moreover, the MC-LR can be released from nanocomposites at 75°C, thus, the reuse of Apt-3/PEG/GO is realized. Real sample analysis indicated that the Apt-3/PEG/GO nanocomposites coupled with MALDI-MS were efficient in detecting trace amounts of MC-LR in real samples. With the merits of being low cost, reusable, and easy to besynthesized, this Apt-3/PEG/GO MALDI-MS is expected to be comprehensively applied by anchoring suitable aptamers for different targets.
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Affiliation(s)
- Junli Feng
- Collaborative Innovation Center of Seafood Deep Processing, Zhejiang Province Joint Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou, P. R. China
| | - Linpei Dong
- Institute of Forensic Science, Ministry of Public Security, Beijing, P. R. China
| | - Haixing Wang
- Key Laboratory of Drug Monitoring and Control of Zhejiang Province, National Anti-Drug Laboratory Zhejiang Regional Center, Hangzhou, P. R. China
| | - Yihong Xie
- Heart Center, Department of Cardiovascular Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, P. R. China
| | - Huizi Wang
- Heart Center, Department of Cardiovascular Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, P. R. China
| | - Lan Ding
- Heart Center, Department of Cardiovascular Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, P. R. China
| | - Gongshuai Song
- Collaborative Innovation Center of Seafood Deep Processing, Zhejiang Province Joint Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou, P. R. China
| | - Jian Zhang
- Collaborative Innovation Center of Seafood Deep Processing, Zhejiang Province Joint Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou, P. R. China
| | - Ting Li
- Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, P. R. China
| | - Qing Shen
- Collaborative Innovation Center of Seafood Deep Processing, Zhejiang Province Joint Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou, P. R. China
| | - Yunfeng Zhang
- Institute of Forensic Science, Ministry of Public Security, Beijing, P. R. China
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, P. R. China
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Badagian N, Pírez Schirmer M, Pérez Parada A, Gonzalez-Sapienza G, Brena BM. Determination of Microcystins in Fish Tissue by ELISA and MALDI-TOF MS Using a Highly Specific Single Domain Antibody. Toxins (Basel) 2023; 15:toxins15020084. [PMID: 36828400 PMCID: PMC9966346 DOI: 10.3390/toxins15020084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/05/2023] [Accepted: 01/12/2023] [Indexed: 01/20/2023] Open
Abstract
The development of simple, reliable, and cost-effective methods is critically important to study the spatial and temporal variation of microcystins (MCs) in the food chain. Nanobodies (Nbs), antigen binding fragments from camelid antibodies, present valuable features for analytical applications. Their small antigen binding site offers a focused recognition of small analytes, reducing spurious cross-reactivity and matrix effects. A high affinity and broad cross-reactivity anti-MCs-Nb, from a llama antibody library, was validated in enzyme linked immunosorbent assay (ELISA), and bound to magnetic particles with an internal standard for pre-concentration in quantitative-matrix-assisted laser desorption ionization-time of flight mass spectrometry (Nb-QMALDI MS). Both methods are easy and fast; ELISA provides a global result, while Nb-QMALDI MS allows for the quantification of individual congeners and showed excellent performance in the fish muscle extracts. The ELISA assay range was 1.8-29 ng/g and for Nb-QMALDI, it was 0.29-29 ng/g fish ww. Fifty-five fish from a MC-containing dam were analyzed by both methods. The correlation ELISA/sum of the MC congeners by Nb-QMALDI-MS was very high (r Spearman = 0.9645, p < 0.0001). Using ROC curves, ELISA cut-off limits were defined to accurately predict the sum of MCs by Nb-QMALDI-MS (100% sensitivity; ≥89% specificity). Both methods were shown to be simple and efficient for screening MCs in fish muscle to prioritize samples for confirmatory methods.
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Affiliation(s)
- Natalia Badagian
- Biochemistry Area, Department of Biosciences, Faculty of Chemistry, Universidad de la República, Av. Gral. Flores 2124, Montevideo 11800, Uruguay
| | - Macarena Pírez Schirmer
- Immunology Area, Department of Biosciences, Faculty of Chemistry, Universidad de la República, Av A. Navarro 3051, Montevideo 11600, Uruguay
| | - Andrés Pérez Parada
- Technological Development Department, Centro Universitario Regional del Este, Universidad de la República, Ruta 9, Rocha 27000, Uruguay
| | - Gualberto Gonzalez-Sapienza
- Immunology Area, Department of Biosciences, Faculty of Chemistry, Universidad de la República, Av A. Navarro 3051, Montevideo 11600, Uruguay
| | - Beatriz M. Brena
- Biochemistry Area, Department of Biosciences, Faculty of Chemistry, Universidad de la República, Av. Gral. Flores 2124, Montevideo 11800, Uruguay
- Correspondence:
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Xu Z, Zhang Z, She Z, Lin C, Lin X, Xie Z. Aptamer-functionalized metal-organic framework-coated nanofibers with multi-affinity sites for highly sensitive, selective recognition of ultra-trace microcystin-LR. Talanta 2022; 236:122880. [PMID: 34635260 DOI: 10.1016/j.talanta.2021.122880] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 11/26/2022]
Abstract
A novel aptamer-functionalized metal-organic framework nanofibrous composite (viz. PAN/UiO@UiO2-N3-aptamer) with a high aptamer coverage density was proposed based on the electrospinning and seeded growth method, and used for specific affinity recognition of trace Microcystin-LR (MC-LR). Heterobifunctional ligand was used to modify the metal-organic framework nanoparticles (MOF NPs) surface, which could passivate the MOF surface with respect to unmodified DNA, followed by coupling massive aptamers on MOF of the solid-phase microextraction (SPME) fiber using click chemistry. Characterizations including morphology, spectra analysis, mechanical stability, binding capacity and specificity were fulfilled. Applied to the analysis of MC-LR, the good selective and sensitive recognition were obtained with the detection limit as low as 0.003 ng/mL, which was better than most non-specific SPME or solid-phase extraction (SPE) protocols. The stability and reproducibility were acceptable, and the intra-day, inter-day and column-to-column relative standard deviations (RSDs) for the recovery of MC-LR were gained in the range from 2.5% to 14.3%, respectively. Satisfactory recoveries of MC-LR in environmental water samples were measured as 96.3 ± 4.7% - 98.9 ± 2.7% (n = 3) in tap water, 94.4 ± 2.5% - 96.1 ± 3.5% (n = 3) in pond water, and 97.0 ± 2.1% - 97.9 ± 3.1% (n = 3) in river water, respectively. This work demonstrated that the electrospun nanofibrous composite with massive aptamers would be a better alternative for ultra-trace MC-LR detection with good selectivity, matrix-resistance ability and high resolution.
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Affiliation(s)
- Zhiqun Xu
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Zhexiang Zhang
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Zongkang She
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Chenchen Lin
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Xucong Lin
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China; Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety, Fujian, Fuzhou, 350108, People's Republic of China.
| | - Zenghong Xie
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China; Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety, Fujian, Fuzhou, 350108, People's Republic of China
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Cornut J, De Respinis S, Tonolla M, Petrini O, Bärlocher F, Chauvet E, Bruder A. Rapid characterization of aquatic hyphomycetes by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Mycologia 2019; 111:177-189. [PMID: 30640580 DOI: 10.1080/00275514.2018.1528129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Protein fingerprinting using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI--TOF MS) is a rapid, reliable, and economical method to characterize isolates of terrestrial fungi and other microorganisms. The objective of our study was to evaluate the suitability of MALDI-TOF MS for the identification of aquatic hyphomycetes, a polyphyletic group of fungi that play crucial roles in stream ecosystems. To this end, we used 34 isolates of 21 aquatic hyphomycete species whose identity was confirmed by spore morphology and internal transcribed spacer (ITS1-5.8S-ITS2 = ITS) nuc rDNA sequencing. We tested the efficiency of three protein extraction methods, including chemical and mechanical treatments using 13 different protocols, with the objective of producing high-quality MALDI-TOF mass spectra. In addition to extraction protocols, mycelium age was identified as a key parameter affecting protein extraction efficiency. The dendrogram based on mass-spectrum similarity indicated good and relevant taxonomic discrimination; the tree structure was comparable to that of the phylogram based on ITS sequences. Consequently, MALDI-TOF MS could reliably identify the isolates studied and provided greater taxonomic accuracy than classical morphological methods. MALDI-TOF MS seems suited for rapid characterization and identification of aquatic hyphomycete species.
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Affiliation(s)
- Julien Cornut
- a Laboratory of Applied Microbiology, University of Applied Sciences and Arts of Southern Switzerland , Via Mirasole 22A, 6501 Bellinzona , Switzerland.,b Institute of Earth Sciences, University of Applied Sciences and Arts of Southern Switzerland, Trevano Campus , 6952 Canobbio , Switzerland
| | - Sophie De Respinis
- a Laboratory of Applied Microbiology, University of Applied Sciences and Arts of Southern Switzerland , Via Mirasole 22A, 6501 Bellinzona , Switzerland
| | - Mauro Tonolla
- a Laboratory of Applied Microbiology, University of Applied Sciences and Arts of Southern Switzerland , Via Mirasole 22A, 6501 Bellinzona , Switzerland.,c Microbial Ecology Laboratory, Microbiology Unit, Department of Botany and Plant Biology , University of Geneva , Switzerland
| | | | - Felix Bärlocher
- e Department of Biology , Mount Allison University , Sackville , News Brunswick E4L1G7, Canada
| | - Eric Chauvet
- f EcoLab, Université de Toulouse , CNRS, UPS, INPT, 31062 Toulouse , France
| | - Andreas Bruder
- a Laboratory of Applied Microbiology, University of Applied Sciences and Arts of Southern Switzerland , Via Mirasole 22A, 6501 Bellinzona , Switzerland.,b Institute of Earth Sciences, University of Applied Sciences and Arts of Southern Switzerland, Trevano Campus , 6952 Canobbio , Switzerland
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The comparison of CHCA solvent compositions for improving LC-MALDI performance and its application to study the impact of aflatoxin B1 on the liver proteome of diabetes mellitus type 1 mice. PLoS One 2017; 12:e0181423. [PMID: 28738076 PMCID: PMC5524319 DOI: 10.1371/journal.pone.0181423] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 06/19/2017] [Indexed: 01/16/2023] Open
Abstract
In nanoflow liquid chromatography-matrix-assisted laser desorption/ionization tandem time-of-flight (nanoLC-MALDI-TOF/TOF) approaches, it is critical to directly apply small amounts of the sample elutes on the sample target using a nanoLC system due to its low flow rate of 200 ~ 300 nl/min. It is recommended to apply a sheath liquid containing a matrix with a several μL/min flow rate at the end of the nanoLC column to ensure a larger co-eluted droplet for more reproducible sample spotting and avoid the laborious task of post-manual matrix spotting. In this study, to achieve a better nanoLC-MALDI performance on sample spotting, we first compared α-Cyano-4-hydroxycinnamic acid (CHCA) solvent composition for efficiently concentrating nanoLC elutes on an anchor chip. The solvent composition of isopropanol (IPA): acetonitrile (ACN):acetone:0.1% Trifluoroacetic acid (TFA) (2:7:7:2) provided strong and homogeneous signals with higher peptide ion yields than the other solvent compositions. Then, nanoLC-MALDI-TOF/TOF was applied to study the impact of aflatoxin B1 on the liver proteome from diabetes mellitus type 1 mice. Aflatoxin B1 (AFB1), produced by Aspergillus flavus and Aspergillus parasiticus is a carcinogen and a known causative agent of liver cancer. To evaluate the effects of long-term exposure to AFB1 on type 1 diabetes mellitus (TIDM), the livers of T1DM control mice and mice treated with AFB1 were analyzed using isotope-coded protein labeling (ICPL)-based quantitative proteomics. Our results showed that gluconeogenesis, lipid, and oxidative phosphorylation mechanisms, normally elevated in T1DM, were disordered following AFB1 treatment. In addition, major urinary protein 1 (MUP1), an indicator of increased insulin sensitivity, was significantly decreased in the T1DM/AFB1 group and may have resulted in higher blood glucose levels compared to the T1DM group. These results indicate that T1DM patients should avoid the AFB1 intake, as they could lead to increased blood glucose levels and disorders of energy-producing mechanisms.
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Rzagalinski I, Volmer DA. Quantification of low molecular weight compounds by MALDI imaging mass spectrometry - A tutorial review. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1865:726-739. [PMID: 28012871 DOI: 10.1016/j.bbapap.2016.12.011] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 12/01/2016] [Accepted: 12/19/2016] [Indexed: 10/20/2022]
Abstract
Matrix-assisted laser desorption/ionization (MALDI)-mass spectrometry imaging (MSI) permits label-free in situ analysis of chemical compounds directly from the surface of two-dimensional biological tissue slices. It links qualitative molecular information of compounds to their spatial coordinates and distribution within the investigated tissue. MALDI-MSI can also provide the quantitative amounts of target compounds in the tissue, if proper calibration techniques are performed. Obviously, as the target molecules are embedded within the biological tissue environment and analysis must be performed at their precise locations, there is no possibility for extensive sample clean-up routines or chromatographic separations as usually performed with homogenized biological materials; ion suppression phenomena therefore become a critical side effect of MALDI-MSI. Absolute quantification by MALDI-MSI should provide an accurate value of the concentration/amount of the compound of interest in relatively small, well-defined region of interest of the examined tissue, ideally in a single pixel. This goal is extremely challenging and will not only depend on the technical possibilities and limitations of the MSI instrument hardware, but equally on the chosen calibration/standardization strategy. These strategies are the main focus of this article and are discussed and contrasted in detail in this tutorial review. This article is part of a Special Issue entitled: MALDI Imaging, edited by Dr. Corinna Henkel and Prof. Peter Hoffmann.
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Affiliation(s)
- Ignacy Rzagalinski
- Institute of Bioanalytical Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - Dietrich A Volmer
- Institute of Bioanalytical Chemistry, Saarland University, 66123 Saarbrücken, Germany.
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Bilibana MP, Williams AR, Rassie C, Sunday CE, Makelane H, Wilson L, Ntshongontshi N, Jijana AN, Masikini M, Baker PGL, Iwuoha EI. Electrochemical Aptatoxisensor Responses on Nanocomposites Containing Electro-Deposited Silver Nanoparticles on Poly(Propyleneimine) Dendrimer for the Detection of Microcystin-LR in Freshwater. SENSORS (BASEL, SWITZERLAND) 2016; 16:E1901. [PMID: 27845719 PMCID: PMC5134560 DOI: 10.3390/s16111901] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 10/19/2016] [Accepted: 10/20/2016] [Indexed: 02/07/2023]
Abstract
A sensitive and reagentless electrochemical aptatoxisensor was developed on cobalt (II) salicylaldiimine metallodendrimer (SDD-Co(II)) doped with electro-synthesized silver nanoparticles (AgNPs) for microcystin-LR (L, l-leucine; R, l-arginine), or MC-LR, detection in the nanomolar range. The GCE|SDD-Co(II)|AgNPs aptatoxisensor was fabricated with 5' thiolated aptamer through self-assembly on the modified surface of the glassy carbon electrode (GCE) and the electronic response was measured using cyclic voltammetry (CV). Specific binding of MC-LR with the aptamer on GCE|SDD-Co(II)|AgNPs aptatoxisensor caused the formation of a complex that resulted in steric hindrance and electrostatic repulsion culminating in variation of the corresponding peak current of the electrochemical probe. The aptatoxisensor showed a linear response for MC-LR between 0.1 and 1.1 µg·L-1 and the calculated limit of detection (LOD) was 0.04 µg·L-1. In the detection of MC-LR in water samples, the aptatoxisensor proved to be highly sensitive and stable, performed well in the presence of interfering analog and was comparable to the conventional analytical techniques. The results demonstrate that the constructed MC-LR aptatoxisensor is a suitable device for routine quantification of MC-LR in freshwater and environmental samples.
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Affiliation(s)
- Mawethu P Bilibana
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Avril R Williams
- Department of Biological and Chemical Sciences, The University of the West Indies, Cave Hill, St. Michael BB11000, Barbados.
| | - Candice Rassie
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Christopher E Sunday
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Hlamulo Makelane
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Lindsay Wilson
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Nomaphelo Ntshongontshi
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Abongile N Jijana
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Milua Masikini
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Priscilla G L Baker
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
| | - Emmanuel I Iwuoha
- SensorLab, Department of Chemistry, University of Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.
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Trenchevska O, Koska J, Sinari S, Yassine H, Reaven PD, Billheimer DD, Nelson RW, Nedelkov D. Association of Cystatin C Proteoforms with Estimated Glomerular Filtration Rate. CLINICAL MASS SPECTROMETRY (DEL MAR, CALIF.) 2016; 1:27-31. [PMID: 36778895 PMCID: PMC9913891 DOI: 10.1016/j.clinms.2016.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Background Cystatin C (CysC), a marker for chronic kidney disease, exists as three sequence proteoforms, in addition to the wild-type sequence: one contains hydroxyproline at position 3 (3Pro-OH), the two others have truncated sequences (des-S and des-SSP). Here, we examine correlations between each of these CysC proteoforms and estimated glomerular filtration rate (eGFR), a diagnostic criterion for chronic kidney disease (CKD). Methods CysC proteoform concentrations were determined from the plasma of 297 diabetes patients at a baseline time point and nine-months later, using a mass spectrometric immunoassay, and were correlated with eGFR calculations. Results In all samples, 3Pro-OH was the most abundant CysC proteoform, followed by the wild-type proteoform. Least abundant were the truncated CysC proteoforms, des-S and des-SSP, although they demonstrated stronger negative correlation with eGFR than the 3Pro-OH and wild-type proteoforms. The des-SSP truncated proteoform exhibited negative predictive value for eGFR. Conclusions The truncated CysC proteoforms show potential for clinical and prognostic utility in CKD staging. This could be useful in populations where current methods do not provide satisfactory solutions.
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Affiliation(s)
| | - Juraj Koska
- Department of Medicine, Phoenix Veteran Affairs Medical Center, Phoenix, AZ, USA
| | - Shripad Sinari
- Biostatics Consulting Lab, University of Arizona, Tucson, AZ, USA
| | - Hussein Yassine
- Department of Medicine, University of Southern California, Los Angeles, USA
| | - Peter D. Reaven
- Department of Medicine, Phoenix Veteran Affairs Medical Center, Phoenix, AZ, USA
| | | | | | - Dobrin Nedelkov
- The Biodesign Institute, Arizona State University, Tempe, AZ, USA,Corresponding author: , PO Box 876601, Tempe AZ 85287-6601, USA, Tel. 480-727-2280
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Facile synthesis of Cu2+-modified mesoporous silica-coated magnetic graphene composite for enrichment of microcystin-LR followed by mass spectrometry analysis. Talanta 2016; 154:183-9. [DOI: 10.1016/j.talanta.2016.03.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 03/15/2016] [Accepted: 03/19/2016] [Indexed: 10/22/2022]
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A non-enzymatic electrochemical immunosensor for microcystin-LR rapid detection based on Ag@MSN nanoparticles. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.11.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Adaptation of microcystin thiol derivatization for matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometry analysis. Toxicon 2016; 109:13-7. [DOI: 10.1016/j.toxicon.2015.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 10/28/2015] [Accepted: 11/05/2015] [Indexed: 11/18/2022]
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Fayad PB, Roy-Lachapelle A, Duy SV, Prévost M, Sauvé S. On-line solid-phase extraction coupled to liquid chromatography tandem mass spectrometry for the analysis of cyanotoxins in algal blooms. Toxicon 2015; 108:167-75. [DOI: 10.1016/j.toxicon.2015.10.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/28/2015] [Accepted: 10/15/2015] [Indexed: 01/07/2023]
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Flores C, Caixach J. An integrated strategy for rapid and accurate determination of free and cell-bound microcystins and related peptides in natural blooms by liquid chromatography-electrospray-high resolution mass spectrometry and matrix-assisted laser desorption/ionization time-of-flight/time-of-flight mass spectrometry using both positive and negative ionization modes. J Chromatogr A 2015; 1407:76-89. [PMID: 26141269 DOI: 10.1016/j.chroma.2015.06.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 05/13/2015] [Accepted: 06/11/2015] [Indexed: 12/20/2022]
Abstract
An integrated high resolution mass spectrometry (HRMS) strategy has been developed for rapid and accurate determination of free and cell-bound microcystins (MCs) and related peptides in water blooms. The natural samples (water and algae) were filtered for independent analysis of aqueous and sestonic fractions. These fractions were analyzed by MALDI-TOF/TOF-MS and ESI-Orbitrap-HCD-MS. MALDI, ESI and the study of fragmentation sequences have been provided crucial structural information. The potential of combined positive and negative ionization modes, full scan and fragmentation acquisition modes (TOF/TOF and HCD) by HRMS and high resolution and accurate mass was investigated in order to allow unequivocal determination of MCs. Besides, a reliable quantitation has been possible by HRMS. This composition helped to decrease the probability of false positives and negatives, as alternative to commonly used LC-ESI-MS/MS methods. The analysis was non-target, therefore covered the possibility to analyze all MC analogs concurrently without any pre-selection of target MC. Furthermore, archived data was subjected to retrospective "post-targeted" analysis and a screening of other potential toxins and related peptides as anabaenopeptins in the samples was done. Finally, the MS protocol and identification tools suggested were applied to the analysis of characteristic water blooms from Spanish reservoirs.
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Affiliation(s)
- Cintia Flores
- Mass Spectrometry Laboratory/Organic Pollutants, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
| | - Josep Caixach
- Mass Spectrometry Laboratory/Organic Pollutants, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
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Rankin K, Mabury SA. Matrix normalized MALDI-TOF quantification of a fluorotelomer-based acrylate polymer. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:6093-6101. [PMID: 25866313 DOI: 10.1021/es505931v] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The degradation of fluorotelomer-based acrylate polymers (FTACPs) has been hypothesized to serve as a source of the environmental contaminants, perfluoroalkyl carboxylates (PFCAs). Studies have relied on indirect measurement of presumed degradation products to evaluate the environmental fate of FTACPs; however, this approach leaves a degree of uncertainty. The present study describes the development of a quantitative matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry method as the first direct analysis method for FTACPs. The model FTACP used in this study was poly(8:2 FTAC-co-HDA), a copolymer of 8:2 fluorotelomer acrylate (8:2 FTAC) and hexadecyl acrylate (HDA). Instead of relying on an internal standard polymer, the intensities of 40 poly(8:2 FTAC-co-HDA) signals (911-4612 Da) were normalized to the signal intensity of a matrix-sodium cluster (659 Da). We termed this value the normalized polymer response (P(N)). By using the same dithranol solution for the sample preparation of poly(8:2 FTAC-co-HDA) standards, calibration curves with coefficient of determinations (R(2)) typically >0.98 were produced. When poly(8:2 FTAC-co-HDA) samples were prepared with the same dithranol solution as the poly(8:2 FTAC-co-HDA) standards, quantification to within 25% of the theoretical concentration was achieved. This approach minimized the sample-to-sample variability that typically plagues MALDI-TOF, and is the first method developed to directly quantify FTACPs.
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Affiliation(s)
- Keegan Rankin
- Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario Canada, M5S 3H6
| | - Scott A Mabury
- Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario Canada, M5S 3H6
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High levels of structural diversity observed in microcystins from Microcystis CAWBG11 and characterization of six new microcystin congeners. Mar Drugs 2014; 12:5372-95. [PMID: 25402827 PMCID: PMC4245536 DOI: 10.3390/md12115372] [Citation(s) in RCA: 112] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 10/21/2014] [Accepted: 10/23/2014] [Indexed: 01/18/2023] Open
Abstract
Microcystins (MCs) are cyclic peptides produced by cyanobacteria, which can be harmful to humans and animals when ingested. Differences in the coding of the non‑ribosomal peptide synthetase/polyketide synthase enzyme complex responsible for microcystin production have resulted in more than 100 microcystin variants being reported to date. The microcystin diversity of Microcystis CAWBG11 was investigated using matrix-assisted laser desorption/ionization-time of flight mass spectrometry and liquid chromatography-mass spectrometry. This revealed that CAWBG11 simultaneously produced 21 known microcystins and six new congeners: [Asp3] MC-RA, [Asp3] MC-RAba, [Asp3] MC-FA, [Asp3] MC-WA, MC-FAba and MC-FL. The new congeners were putatively characterized by tandem mass spectrometry and chemical derivatization. A survey of the microcystin congeners produced by 49 cyanobacterial strains documented in scientific literature showed that cyanobacteria generally produce four microcystin congeners, but strains which produce up to 47 microcystin congeners have been reported. Microcystis CAWBG11 (which produces at least 27 congeners) was positioned in the top ten percentile of the strains surveyed, and showed fluidity of the amino acids incorporated into both position two and position four.
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Bortoli S, Volmer DA. Account: characterization and identification of microcystins by mass spectrometry. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2014; 20:1-19. [PMID: 24881451 DOI: 10.1255/ejms.1250] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this brief overview, the authors describe mass spectral techniques for the detection and identification of microcystin toxins. Microcystins are secondary metabolites produced by cyanobacteria. Determination of these toxic compounds and discovery of new variants is very important as they pose a great danger to the human food chain. Cyanobacterial blooms frequently occur in many areas worldwide and have the potential to contaminate the water via cyanotoxin release, especially microcystins. Among the various analytical techniques used for analysis, mass spectrometry has become the most important method as it allows simultaneous quantification and structural characterization of multiple microcystin variants. This brief overview article focuses on mass spectrometry techniques for identification of microcystins, including ionization methods, mass spectral fragmentation routes, profiling techniques, tandem and high-resolution mass spectrometry as well as typing of cyanobacterial strains.
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Roegner AF, Schirmer MP, Puschner B, Brena B, Gonzalez-Sapienza G. Rapid quantitative analysis of microcystins in raw surface waters with MALDI MS utilizing easily synthesized internal standards. Toxicon 2013; 78:94-102. [PMID: 24388801 DOI: 10.1016/j.toxicon.2013.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 12/13/2013] [Accepted: 12/19/2013] [Indexed: 10/25/2022]
Abstract
The freshwater cyanotoxins, microcystins (MCs), pose a global public health threat as potent hepatotoxins in cyanobacterial blooms; their persistence in drinking and recreational water has been associated with potential chronic effects in addition to acute intoxications. Rapid and accurate detection of the over 80 structural congeners is challenged by the rigorous and time consuming clean up required to overcome interference found in raw water samples. MALDI-MS has shown promise for rapid quantification of individual congeners in raw water samples, with very low operative cost, but so far limited sensitivity and lack of available and versatile internal standards (ISs) has limited its use. Two easily synthesized S-hydroxyethyl-Cys(7)-MC-LR and -RR ISs were used to generate linear standard curves in a reflectron MALDI instrument, reproducible across several orders of magnitude for MC-LR, -RR and -YR. Minimum quantification limits in direct water samples with no clean up or concentration step involved were consistently below 7 μg/L, with recoveries from spiked samples between 80 and 119%. This method improves sensitivity by 30 fold over previous reports of quantitative MALDI-TOF applications to MCs and provides a salient option for rapid throughput analysis for multiple MC congeners in untreated raw surface water blooms as a means to identify source public health threats and target intervention strategies within a watershed. As demonstrated by analysis of a set of samples from Uruguay, utilizing the reaction of different MC congeners with alternate sulfhydryl compounds, the m/z of the IS can be customized to avoid overlap with interfering compounds in local surface water samples.
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Affiliation(s)
- Amber F Roegner
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Macarena Pírez Schirmer
- Cátedra de Bioquímica, Facultad de Química, Universidad de la República, Montevideo, Uruguay; Cátedra Inmunología, Facultad de Química, Universidad de la República, Instituto de Higiene, Montevideo, Uruguay
| | - Birgit Puschner
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Beatriz Brena
- Cátedra de Bioquímica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Gualberto Gonzalez-Sapienza
- Cátedra Inmunología, Facultad de Química, Universidad de la República, Instituto de Higiene, Montevideo, Uruguay.
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Liu H, Lu X, Deng C, Yan X. Highly sensitive MC-LR detection by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry with magnetic mesoporous silica for fast extraction. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2013; 27:2515-2518. [PMID: 24097408 DOI: 10.1002/rcm.6714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 08/18/2013] [Accepted: 08/20/2013] [Indexed: 06/02/2023]
Affiliation(s)
- Huanqian Liu
- Center of Analysis and Measurement, Fudan University, Shanghai, 200433, China
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Ahn SH, Bae YJ, Moon JH, Kim MS. Matrix Suppression as a Guideline for Reliable Quantification of Peptides by Matrix-Assisted Laser Desorption Ionization. Anal Chem 2013; 85:8796-801. [DOI: 10.1021/ac401967n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Hee Ahn
- Department
of Chemistry, Seoul National University, Seoul 151-742, Korea
| | - Yong Jin Bae
- Department
of Chemistry, Seoul National University, Seoul 151-742, Korea
| | - Jeong Hee Moon
- Medical
Proteomics Research Center, KRIBB, Daejeon 305-806, Korea
| | - Myung Soo Kim
- Department
of Chemistry, Seoul National University, Seoul 151-742, Korea
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Srivastava A, Singh S, Ahn CY, Oh HM, Asthana RK. Monitoring approaches for a toxic cyanobacterial bloom. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:8999-9013. [PMID: 23865979 DOI: 10.1021/es401245k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Cyanobacterial blooms, dominated by Microcystis sp. and associated microcystin variants, have been implicated in illnesses of humans and animals. Little is known regarding the formation of blooms and the presence of cyanotoxin variants in water bodies. Furthermore, the role played by ecological parameters, in regulating Microcystis blooms is complicate and diverse. Local authorities responsible for water management are often faced with the challenging task of dealing with cyanobacterial blooms. Therefore, the development of suitable monitoring approaches to characterize cyanobacterial blooms is an important goal. Currently, various biological, biochemical and physicochemical methods/approaches are being used to monitor cyanobacterial blooms and detect microcystins in freshwater bodies. Because these methods can vary as to the information they provide, no single approach seemed to be sufficient to accurately monitor blooms. For example, immunosensors are more suited for monitoring the presence of toxins in clear water bodies while molecular methods are more suited to detect potentially toxic strains. Thus, monitoring approaches should be tailored for specific water bodies using methods based on economic feasibility, speed, sensitivity and field applicability. This review critically evaluates monitoring approaches that are applicable to cyanobacterial blooms, especially those that focus on the presence of Microcystis, in freshwater bodies. Further, they were characterized and ranked according to their cost, speed, sensitivity and selectivity. Suggested improvements were offered as well as future research endeavors to accommodate anticipated environmental changes.
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Affiliation(s)
- Ankita Srivastava
- Centre of Advanced Study in Botany, Banaras Hindu University , Varanasi-221 005, India
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Determination of six microcystins and nodularin in surface and drinking waters by on-line solid phase extraction–ultra high pressure liquid chromatography tandem mass spectrometry. J Chromatogr A 2012; 1266:61-8. [DOI: 10.1016/j.chroma.2012.10.017] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 09/27/2012] [Accepted: 10/08/2012] [Indexed: 11/21/2022]
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Puddick J, Prinsep MR, Wood SA, Craig Cary S, Hamilton DP. Enhanced sample preparation for quantitation of microcystins by matrix-assisted laser desorption/ionisation-time of flight mass spectrometry. PHYTOCHEMICAL ANALYSIS : PCA 2012; 23:285-291. [PMID: 21960244 DOI: 10.1002/pca.1356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 07/12/2011] [Accepted: 07/16/2011] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Microcystins (MCs) are a group of cyanotoxins which pose a serious health threat when present in aquatic systems. Quantitative analysis of MCs by matrix-assisted laser desorption/ionisation-time of flight (MALDI-TOF) mass spectrometry has potential for the processing of large numbers of samples quickly and economically. The existing method uses an expensive internal standard and protocols that are incompatible with automated sample preparation and data acquisition. OBJECTIVE To produce a MALDI-TOF sample preparation technique for the quantitation of MCs that not only maintains reproducibility and sensitivity, but is also compatible with an automated work-flow. METHODOLOGY Seven different MALDI-TOF sample preparations were assessed for signal reproducibility (coefficient of variation) and sensitivity (method detection limit) using a cost-effective internal standard (angiotensin I). The best preparation was then assessed for its quantitative performance using three different MC congeners ([Dha⁷] MC-LR, MC-RR and MC-YR). RESULTS The sensitivity of six of the preparations was acceptable, as was the reproducibility for two thin-layer preparations performed on a polished steel target. Both thin-layer preparations could be used with a MALDI-TOF mass spectrometer that automatically acquires data, and one could be used in an automated sample preparation work-flow. Further investigation using the thin-layer spot preparation demonstrated that linear quantification of three different MC congeners was possible. CONCLUSION The study demonstrates that with different sample preparation methods and modern instrumentation, large numbers of samples can be analysed rapidly for MCs at low cost.
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Affiliation(s)
- Jonathan Puddick
- Department of Chemistry, University of Waikato, Hamilton, New Zealand
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Zhang J, Lei J, Pan R, Leng C, Hu Z, Ju H. In situassembly of gold nanoparticles on nitrogen-doped carbon nanotubes for sensitive immunosensing of microcystin-LR. Chem Commun (Camb) 2011; 47:668-70. [DOI: 10.1039/c0cc04198j] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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del Campo FF, Ouahid Y. Identification of microcystins from three collection strains of Microcystis aeruginosa. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2010; 158:2906-2914. [PMID: 20619941 DOI: 10.1016/j.envpol.2010.06.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 05/30/2010] [Accepted: 06/09/2010] [Indexed: 05/29/2023]
Abstract
Microcystins (MCs) are toxic cyclic heptapeptides produced by various cyanobacteria genera, especially Microcystis. We identified 10 out of 12 MCs produced by three Microcystis aeruginosa strains from cyanobacteria collections, UTEX 2666, UTEX 2670 and UAM 1303, by using two analytical methods: Matrix-assisted Laser Desorption Ionization Time of Flight Mass Spectrometry (MALDI-TOF/MS) and HPLC Photodiode Array Detector coupled to a hybrid Quadrupole Time of Flight Mass Spectrometry (HPLC-PDA-QTOF/MS). MALDI-TOF/MS failed to detect non-polar MCs, such as MC-LY and MC-LW. HPLC-QTOF/MS permitted the accurate identification of most MCs present in methanolic extracts. Besides, three new MCs, namely: [D-Glu(OCH3)6, D-Asp3] MC-LAba, MC-YL and MC-YM were detected by HPLC-QTOF/MS.
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Affiliation(s)
- Francisca F del Campo
- Departamento de Biología, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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Zhang J, Lei J, Xu C, Ding L, Ju H. Carbon Nanohorn Sensitized Electrochemical Immunosensor for Rapid Detection of Microcystin-LR. Anal Chem 2010; 82:1117-22. [DOI: 10.1021/ac902914r] [Citation(s) in RCA: 192] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Zhang
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), Department of Chemistry, Nanjing University, Nanjing 210093, and School of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Jianping Lei
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), Department of Chemistry, Nanjing University, Nanjing 210093, and School of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Chuanlai Xu
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), Department of Chemistry, Nanjing University, Nanjing 210093, and School of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Lin Ding
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), Department of Chemistry, Nanjing University, Nanjing 210093, and School of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Huangxian Ju
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), Department of Chemistry, Nanjing University, Nanjing 210093, and School of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
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Deleuze C, De Pauw E, Quinton L. Selective reduction of C=C double bonds in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry of microcystins. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2010; 16:91-99. [PMID: 20065523 DOI: 10.1255/ejms.1051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Cyanobacteria are photosynthetic bacteria encountered in various aquatic environments. Some of them are able to produce powerful toxins called cyanotoxins. Among cyanotoxins, microcystins (MCs) constitute a group of closely related cyclic heptapeptides. Their sequences are made up of classical amino acids as well as post- translational modified ones. Interestingly, in vivo metabolism of microcystins seems to be greatly dependent on various minor structural differences and particularly those of the seventh amino acid, which can be either dehydroalanine (or a derivative), dehydroaminobutyric acid (or a derivative), serine or alanine. As a consequence, microcystins have been classified on the basis of the nature of this singular amino acid. A major difficulty in the classification of such toxins is that some of them share the same molecular masses and the same molecular formulas. Consequently, a simple mass measurement is not sufficient to determine the structure and the class of a toxin of interest. Heavy and expensive techniques are used to classify them, such as multi-dimensional nuclear magnetic resonance and amino acid analysis. In this work, a new matrix-assisted laser desorption/ionization time-of-flight method leading to an easy classification of MCs is proposed. The methodology relies on the reductive properties of the matrix 1,5-diaminonaphtalene (1,5-DAN) which appears to be able to selectively reduce the double carbon-carbon bond belonging to the seventh amino acid. Moreover, the yield of reduction seems to be influenced by the degree of substitution of this double bond, allowing a discrimination between dehydroalanine and dehydroaminobutyric acid. This selective reduction was confirmed by the study of three synthetic peptides by mass spectrometry and tandem mass spectrometry. According to these results, the use of reductive matrices seems to be promising in the study of microcystins and in their classification. More generally, 1,5-DAN allows the selective reduction of double carbon-carbon bonds. This property could also be employed in the characterization of others types of compound displaying double bonds (petrochemistry, metabolomics....).
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Affiliation(s)
- Christelle Deleuze
- GIGA-R: Laboratoire de Spectrométrie de Masse (L.S.M.), Département de Chimie, Université de Liège, Liège, Belgium
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Meisen I, Distler U, Müthing J, Berkenkamp S, Dreisewerd K, Mathys W, Karch H, Mormann M. Direct Coupling of High-Performance Thin-Layer Chromatography with UV Spectroscopy and IR-MALDI Orthogonal TOF MS for the Analysis of Cyanobacterial Toxins. Anal Chem 2009; 81:3858-66. [DOI: 10.1021/ac900217q] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Iris Meisen
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Ute Distler
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Johannes Müthing
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Stefan Berkenkamp
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Klaus Dreisewerd
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Werner Mathys
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Helge Karch
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
| | - Michael Mormann
- Institute for Hygiene, University of Münster, Robert-Koch-Strasse 41, D-48149 Münster, Germany, Sequenom GmbH, Mendelssohnstrasse 15 d, 22761 Hamburg, Germany, and Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch-Strasse 31, D-48149 Münster, Germany
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Debois D, Hamze K, Guérineau V, Le Caër JP, Holland IB, Lopes P, Ouazzani J, Séror SJ, Brunelle A, Laprévote O. In situ localisation and quantification of surfactins in a Bacillus subtilis swarming community by imaging mass spectrometry. Proteomics 2008; 8:3682-91. [DOI: 10.1002/pmic.200701025] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fujiwaki T, Tasaka M, Yamaguchi S. Quantitative evaluation of sphingomyelin and glucosylceramide using matrix-assisted laser desorption ionization time-of-flight mass spectrometry with sphingosylphosphorylcholine as an internal standard. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 870:170-6. [DOI: 10.1016/j.jchromb.2008.05.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2007] [Revised: 04/26/2008] [Accepted: 05/06/2008] [Indexed: 11/29/2022]
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