1
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Gosselin E, Pop-Damkov P, Xue A, Markandu R, Mlynarski S, Finlay R, Schuller A, Ramsden D, Gangl ET. Development of a quantification method for arginase inhibitors by LC-MS/MS with benzoyl chloride derivatization. J Pharm Biomed Anal 2024; 246:116210. [PMID: 38788624 DOI: 10.1016/j.jpba.2024.116210] [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: 01/02/2024] [Revised: 05/06/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024]
Abstract
Arginase is an enzyme responsible for converting arginine, a semi-essential amino acid, to ornithine and urea. Arginine depletion suppresses immunity via multiple mechanisms including inhibition of T-cell and NK cell proliferation and activity. Arginase inhibition is therefore an attractive mechanism to potentially reverse immune suppression and thus has been explored as a therapy for oncology and respiratory indications. Small molecules targeting arginase present significant bioanalytical challenges for in vitro and in vivo characterization as inhibitors of arginase are typically hydrophilic in nature. The resulting low or negative LogD characteristics are incompatible with common analytical methods such as RP-ESI-MS/MS. Accordingly, a sensitive, high-throughput bioanalytical method was developed by incorporating benzoyl chloride derivatization to increase the hydrophobic characteristics of these polar analytes. Samples were separated by reversed phase chromatography on a Waters XBridge BEH C18 3.5 μm, 30 × 3 mm column using gradient elution. The mass spec was operated in positive mode using electrospray ionization. The m/z 434.1→176.1, 439.4→181.2, 334.9→150.0 and 339.9→150.0 for AZD0011, AZD0011 IS, AZD0011-PL and AZD0011-PL IS respectively were used for quantitation. The linear calibration range of the assay was 1.00-10,000 ng/mL with QC values of 5, 50 and 500 ng/mL. The qualified method presented herein exhibits a novel, robust analytical performance and was successfully applied to evaluate the in vivo ADME properties of boronic acid-based arginase inhibitor prodrug AZD0011 and its active payload AZD0011-PL.
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Affiliation(s)
- Eric Gosselin
- DMPK, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, MA, USA
| | - Petar Pop-Damkov
- DMPK, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, MA, USA
| | - Aixiang Xue
- Animal Sciences & Technology, Clinical Pharmacology and Safety Sciences, Biopharmaceutical R&D, AstraZeneca, Waltham, MA, USA
| | - Roshini Markandu
- Early Oncology Clinical, Oncology R&D, AstraZeneca, Cambridge, UK
| | - Scott Mlynarski
- Chemistry, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, MA, USA
| | - Ray Finlay
- Chemistry, Research and Early Development, Oncology R&D, AstraZeneca, Cambridge, UK
| | - Alwin Schuller
- Bioscience, Research and Early Development, Oncology R&D, AstraZeneca,Waltham, MA, USA
| | - Diane Ramsden
- DMPK, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, MA, USA
| | - Eric T Gangl
- Clinical Pharmacology and Safety Sciences, Biopharmaceuticals R&D, AstraZeneca, Waltham, USA
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2
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Garcia B, Becker CC, Weber L, Swarr GJ, Kido Soule MC, Apprill A, Kujawinski EB. Benzoyl Chloride Derivatization Advances the Quantification of Dissolved Polar Metabolites on Coral Reefs. J Proteome Res 2024; 23:2041-2053. [PMID: 38782401 PMCID: PMC11166142 DOI: 10.1021/acs.jproteome.4c00049] [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: 01/22/2024] [Revised: 04/23/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
Extracellular chemical cues constitute much of the language of life among marine organisms, from microbes to mammals. Changes in this chemical pool serve as invisible signals of overall ecosystem health and disruption to this finely tuned equilibrium. In coral reefs, the scope and magnitude of the chemicals involved in maintaining reef equilibria are largely unknown. Processes involving small, polar molecules, which form the majority components of labile dissolved organic carbon, are often poorly captured using traditional techniques. We employed chemical derivatization with mass spectrometry-based targeted exometabolomics to quantify polar dissolved phase metabolites on five coral reefs in the U.S. Virgin Islands. We quantified 45 polar exometabolites, demonstrated their spatial variability, and contextualized these findings in terms of geographic and benthic cover differences. By comparing our results to previously published coral reef exometabolomes, we show the novel quantification of 23 metabolites, including central carbon metabolism compounds (e.g., glutamate) and novel metabolites such as homoserine betaine. We highlight the immense potential of chemical derivatization-based exometabolomics for quantifying labile chemical cues on coral reefs and measuring molecular level responses to environmental stressors. Overall, improving our understanding of the composition and dynamics of reef exometabolites is vital for effective ecosystem monitoring and management strategies.
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Affiliation(s)
- Brianna
M. Garcia
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | | | - Laura Weber
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Gretchen J. Swarr
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Melissa C. Kido Soule
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Amy Apprill
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Elizabeth B. Kujawinski
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
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3
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Hamilton M, Ferrer‐González FX, Moran MA. Heterotrophic bacteria trigger transcriptome remodelling in the photosynthetic picoeukaryote Micromonas commoda. ENVIRONMENTAL MICROBIOLOGY REPORTS 2024; 16:e13285. [PMID: 38778545 PMCID: PMC11112143 DOI: 10.1111/1758-2229.13285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 04/30/2024] [Indexed: 05/25/2024]
Abstract
Marine biogeochemical cycles are built on interactions between surface ocean microbes, particularly those connecting phytoplankton primary producers to heterotrophic bacteria. Details of these associations are not well understood, especially in the case of direct influences of bacteria on phytoplankton physiology. Here we catalogue how the presence of three marine bacteria (Ruegeria pomeroyi DSS-3, Stenotrophomonas sp. SKA14 and Polaribacter dokdonensis MED152) individually and uniquely impact gene expression of the picoeukaryotic alga Micromonas commoda RCC 299. We find a dramatic transcriptomic remodelling by M. commoda after 8 h in co-culture, followed by an increase in cell numbers by 56 h compared with the axenic cultures. Some aspects of the algal transcriptomic response are conserved across all three bacterial co-cultures, including an unexpected reduction in relative expression of photosynthesis and carbon fixation pathways. Expression differences restricted to a single bacterium are also observed, with the Flavobacteriia P. dokdonensis uniquely eliciting changes in relative expression of algal genes involved in biotin biosynthesis and the acquisition and assimilation of nitrogen. This study reveals that M. commoda has rapid and extensive responses to heterotrophic bacteria in ways that are generalizable, as well as in a taxon specific manner, with implications for the diversity of phytoplankton-bacteria interactions ongoing in the surface ocean.
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Affiliation(s)
- Maria Hamilton
- Department of Marine SciencesUniversity of GeorgiaAthensGeorgiaUSA
| | | | - Mary Ann Moran
- Department of Marine SciencesUniversity of GeorgiaAthensGeorgiaUSA
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4
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Lenhart AE, Booth PPM, Simcox KM, Ramos BA, Kennedy RT. Systematic evaluation of benzoylation for liquid chromatography-mass spectrometry analysis of different analyte classes. J Chromatogr A 2024; 1722:464872. [PMID: 38581975 DOI: 10.1016/j.chroma.2024.464872] [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: 02/04/2024] [Revised: 04/01/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
LC-MS is an indispensable tool for small molecule analysis in many fields; however, many small molecules require chemical derivatization to improve retention on commonly used reversed-phase columns and increase ionization. Benzoyl chloride (BzCl) derivatization is commonly used for derivatization of primary and secondary amines and phenolic alcohols, though evidence exists that with proper reaction conditions (i.e., specific bases), other hydroxyl groups may be derivatized too. Previous studies have examined BzCl concentration, reaction times, and reaction temperatures for derivatization of amines and phenols for LC-MS analysis; however, use of different bases, base concentration, and extending to conditions to hydroxyl groups for LC-MS analysis has not been well-studied. To address this understudied area and identify reaction conditions for both amino and hydroxyl groups, we performed a systematic study of reaction conditions on multiple classes of potential targets. For selected derivatization methods, detection limits and performance in a variety of biological matrices were assessed. Results highlight the importance of tailoring derivatization methods for a given application as they varied by molecule and/or molecule class. Compared to the standard BzCl method commonly used, alternative methods were identified to better derivatize challenging analytes (glucosamine, choline, cortisol, uridine, cytidine) with detection limits reaching 1100, 9, 38, 170, and 67 nM compared to undetectable, 170, 86, 1000, and 86 nM respectively. Sub-nanomolar detection limits were achieved for norepinephrine with alternative derivatization approaches. Improved derivatization methods for several classes and molecules including nucleosides, steroids, and molecules containing hydroxyl groups were also identified.
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Affiliation(s)
- Ashley E Lenhart
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA 48109
| | | | - Kaley M Simcox
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA 48109
| | - Brianna A Ramos
- Department of Neuroscience, University of Michigan, Ann Arbor, MI, USA 48109
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA 48109; Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA 48109.
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5
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Mohajeri M, Ayatollahi SA, Kobarfard F, Goli M, Khandan M, Mokhtari S, Khodadoost M. Wheat germ, a byproduct of the wheat milling industry, as a beneficial source of anti-aging polyamines: A quantitative comparison of various forms. Food Sci Nutr 2023; 11:7242-7254. [PMID: 37970387 PMCID: PMC10630827 DOI: 10.1002/fsn3.3650] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 08/12/2023] [Accepted: 08/15/2023] [Indexed: 11/17/2023] Open
Abstract
Polyamines have received a lot of attention since the 1990s because of their anti-aging, anti-chronic disease, and proliferative effects. Wheat germ was reported as one of the natural sources of high polyamine, especially spermidine. The current study used three types of wheat germ: group A was industrially separated germ from whole grain, group B was the commercially available germinated wheat germ, and group C was manually separated wheat germ from germinated grain. The polyamine content of putrescine, spermidine, and spermine has been determined using a simplified isocratic LC-MS/MS method. An optimized extraction procedure was performed on all seven samples for obtaining a polyamine-enriched extract. The three dominant carbomylated polyamines were identified by analyzing the extracted samples in order to determine their relative abundance. Wheat germ powders contain the highest amount of polyamines (220-337 μg/g) of which spermidine is one of the most important. Germinated wheat grains, on the other hand, contain the least amount of this polyamine. The commercially available separated wheat germs are suggested as a good nutrition source of these polyamines.
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Affiliation(s)
- Maryam Mohajeri
- Phytochemistry Research CenterShahid Beheshti University of Medical SciencesTehranIran
| | - Seyed Abdulmajid Ayatollahi
- Phytochemistry Research CenterShahid Beheshti University of Medical SciencesTehranIran
- Department of Pharmacognosy, School of PharmacyShahid Beheshti University of Medical SciencesTehranIran
| | - Farzad Kobarfard
- Phytochemistry Research CenterShahid Beheshti University of Medical SciencesTehranIran
- Department of Medicinal Chemistry, School of PharmacyShahid Beheshti University of Medical SciencesTehranIran
| | - Mohammad Goli
- Department of Food Science and Technology, Laser and Biophotonics in Biotechnologies Research Center, Isfahan (Khorasgan) BranchIslamic Azad UniversityIsfahanIran
| | - Maryam Khandan
- Phytochemistry Research CenterShahid Beheshti University of Medical SciencesTehranIran
| | - Shaya Mokhtari
- Phytochemistry Research CenterShahid Beheshti University of Medical SciencesTehranIran
- Central Research LaboratoriesShahid Beheshti University of Medical SciencesTehranIran
| | - Mahmoud Khodadoost
- Department of Traditional Medicine, School of Traditional MedicineShahid Beheshti University of Medical SciencesTehranIran
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6
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Gao S, Zhou X, Yue M, Zhu S, Liu Q, Zhao XE. Advances and perspectives in chemical isotope labeling-based mass spectrometry methods for metabolome and exposome analysis. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.117022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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7
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Xu Y, Zhu H, Ding Z, Zhao X, Yin J, Graff B, Gao J, Lalevée J. Distinctive Colorimetric Response of Benzaldehyde Substituted Polydiacetylene Vesicle to Temperature, pH and Organic Amines. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yangyang Xu
- College of Chemistry and Materials Science Anhui Normal University South Jiuhua Road 189 Wuhu Anhui Province 241002 P. R. China
| | - Haibin Zhu
- College of Chemistry and Materials Science Anhui Normal University South Jiuhua Road 189 Wuhu Anhui Province 241002 P. R. China
| | - Zhaofu Ding
- College of Chemistry and Materials Science Anhui Normal University South Jiuhua Road 189 Wuhu Anhui Province 241002 P. R. China
| | - Xianjun Zhao
- College of Chemistry and Materials Science Anhui Normal University South Jiuhua Road 189 Wuhu Anhui Province 241002 P. R. China
| | - Jiansong Yin
- College of Chemistry and Materials Science Anhui Normal University South Jiuhua Road 189 Wuhu Anhui Province 241002 P. R. China
| | - Bernadette Graff
- CNRS Université de Haute‐Alsace IS2M UMR 7361 Mulhouse F‐68100 France
| | - Jiangang Gao
- School of Chemical and Environmental Engineering Anhui Polytechnic University 8th Beijing Middle Road Wuhu 241000 P. R. China
| | - Jacques Lalevée
- CNRS Université de Haute‐Alsace IS2M UMR 7361 Mulhouse F‐68100 France
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8
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Moran MA, Kujawinski EB, Schroer WF, Amin SA, Bates NR, Bertrand EM, Braakman R, Brown CT, Covert MW, Doney SC, Dyhrman ST, Edison AS, Eren AM, Levine NM, Li L, Ross AC, Saito MA, Santoro AE, Segrè D, Shade A, Sullivan MB, Vardi A. Microbial metabolites in the marine carbon cycle. Nat Microbiol 2022; 7:508-523. [PMID: 35365785 DOI: 10.1038/s41564-022-01090-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 02/23/2022] [Indexed: 01/08/2023]
Abstract
One-quarter of photosynthesis-derived carbon on Earth rapidly cycles through a set of short-lived seawater metabolites that are generated from the activities of marine phytoplankton, bacteria, grazers and viruses. Here we discuss the sources of microbial metabolites in the surface ocean, their roles in ecology and biogeochemistry, and approaches that can be used to analyse them from chemistry, biology, modelling and data science. Although microbial-derived metabolites account for only a minor fraction of the total reservoir of marine dissolved organic carbon, their flux and fate underpins the central role of the ocean in sustaining life on Earth.
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Affiliation(s)
- Mary Ann Moran
- Department of Marine Sciences, University of Georgia, Athens, GA, USA.
| | - Elizabeth B Kujawinski
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, USA.
| | - William F Schroer
- Department of Marine Sciences, University of Georgia, Athens, GA, USA
| | - Shady A Amin
- Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Nicholas R Bates
- Bermuda Institute of Ocean Sciences, St George's, Bermuda.,School of Ocean and Earth Sciences, University of Southampton, Southampton, UK
| | - Erin M Bertrand
- Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Rogier Braakman
- Departments of Earth, Atmospheric and Planetary Sciences, and Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - C Titus Brown
- Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA
| | - Markus W Covert
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Scott C Doney
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA
| | - Sonya T Dyhrman
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA.,Department of Earth and Environmental Science, Columbia University, Palisades, NY, USA
| | - Arthur S Edison
- Departments of Biochemistry and Genetics, Complex Carbohydrate Research Center, University of Georgia, Athens, GA, USA
| | - A Murat Eren
- Josephine Bay Paul Center, Marine Biological Laboratory, Woods Hole, MA, USA.,Helmholtz-Institute for Functional Marine Biodiversity (HIFMB), University of Oldenburg, Oldenburg, Germany
| | - Naomi M Levine
- Marine and Environmental Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Liang Li
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Avena C Ross
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada
| | - Mak A Saito
- Department of Marine Sciences, University of Georgia, Athens, GA, USA
| | - Alyson E Santoro
- Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, USA
| | - Daniel Segrè
- Department of Biology and Bioinformatics Program, Boston University, Boston, MA, USA
| | - Ashley Shade
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, USA
| | - Matthew B Sullivan
- Departments of Microbiology and Civil, Environmental, and Geodetic Engineering, and Center of Microbiome Science, The Ohio State University, Columbus, OH, USA
| | - Assaf Vardi
- Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel
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9
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Derivatization-assisted LC-MS/MS method for simultaneous quantification of endogenous gamma-hydroxybutyric acid and its metabolic precursors and products in human urine. Anal Chim Acta 2022; 1194:339401. [DOI: 10.1016/j.aca.2021.339401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 12/01/2021] [Accepted: 12/23/2021] [Indexed: 12/20/2022]
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10
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OUP accepted manuscript. FEMS Microbiol Rev 2022; 46:6585976. [DOI: 10.1093/femsre/fuac020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 11/13/2022] Open
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11
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Guo W, Shi Z, Zhang J, Zeng T, He Y, Cai Z. Analysis of aristolochic acid I in mouse serum and tissues by using magnetic solid-phase extraction and UHPLC-MS/MS. Talanta 2021; 235:122774. [PMID: 34517632 DOI: 10.1016/j.talanta.2021.122774] [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: 06/10/2021] [Revised: 07/25/2021] [Accepted: 07/31/2021] [Indexed: 10/20/2022]
Abstract
A method combining magnetic solid-phase extraction (MSPE) and ultra-high-pressure liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) was developed for the analysis of aristolochic acids I (AAI) in mouse serum and tissues. The magnetic covalent organic frameworks (MNP@COF)-based MSPE exhibited high adsorption capacity towards AAI (93.1 mg/g) in optimal conditions. After MSPE extraction, AAI was separated with C18 column using gradient elution and quantified (m/z 342.21 → 298.13) by UHPLC-MS/MS with monitor reaction monitoring (MRM) mode. This MSPE-based UHPLC-MS/MS method was validated with respected to lower limit of quantification (LLOQ), linearity, recovery, precision and accuracy of intra- and inter-day, and matrix effect. Good calibration linearities at the range of 1-500 ng/L for AAI in biological matrices (serum, kidney, and liver) with high correlation coefficient (R2) > 0.9970, and high enrichment factors (mean values from 1038 to 1045) were obtained. This method was highly sensitive to determine AAI with LLOQ within the range of 4.62-5.24 ng/L in extracted serum, kidney, and liver samples. Recoveries at 5, 50, 100 and 300 ng/L in biological samples ranged from 93.2 to 104.0%, and intra- and inter day accuracy and precision (defined as bias and coefficient of variation, respectively) were below ± 15%. The method was successfully applied in the analysis of biological samples collected from mice exposed with AAI with concentrations range of 0.007-0.041 μg/L for consecutive four days. The established method might be applied for the investigation of risk assessment and toxicity induced by long-time use of AAI-containing herbs or dietary supplements.
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Affiliation(s)
- Wenjing Guo
- Ministry of Education Key Laboratory of Analytical Science for Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - Zhangsheng Shi
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, 999077, SAR, Hong Kong, China
| | - Jing Zhang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, 999077, SAR, Hong Kong, China
| | - Ting Zeng
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, 999077, SAR, Hong Kong, China
| | - Yu He
- Ministry of Education Key Laboratory of Analytical Science for Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, 999077, SAR, Hong Kong, China.
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12
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Ferrer-González FX, Widner B, Holderman NR, Glushka J, Edison AS, Kujawinski EB, Moran MA. Resource partitioning of phytoplankton metabolites that support bacterial heterotrophy. ISME JOURNAL 2020; 15:762-773. [PMID: 33097854 PMCID: PMC8027193 DOI: 10.1038/s41396-020-00811-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 10/02/2020] [Accepted: 10/09/2020] [Indexed: 11/09/2022]
Abstract
The communities of bacteria that assemble around marine microphytoplankton are predictably dominated by Rhodobacterales, Flavobacteriales, and families within the Gammaproteobacteria. Yet whether this consistent ecological pattern reflects the result of resource-based niche partitioning or resource competition requires better knowledge of the metabolites linking microbial autotrophs and heterotrophs in the surface ocean. We characterized molecules targeted for uptake by three heterotrophic bacteria individually co-cultured with a marine diatom using two strategies that vetted the exometabolite pool for biological relevance by means of bacterial activity assays: expression of diagnostic genes and net drawdown of exometabolites, the latter detected with mass spectrometry and nuclear magnetic resonance using novel sample preparation approaches. Of the more than 36 organic molecules with evidence of bacterial uptake, 53% contained nitrogen (including nucleosides and amino acids), 11% were organic sulfur compounds (including dihydroxypropanesulfonate and dimethysulfoniopropionate), and 28% were components of polysaccharides (including chrysolaminarin, chitin, and alginate). Overlap in phytoplankton-derived metabolite use by bacteria in the absence of competition was low, and only guanosine, proline, and N-acetyl-D-glucosamine were predicted to be used by all three. Exometabolite uptake pattern points to a key role for ecological resource partitioning in the assembly marine bacterial communities transforming recent photosynthate.
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Affiliation(s)
| | - Brittany Widner
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA
| | - Nicole R Holderman
- Department of Biochemistry and Complex Carbohydrate Research Center, University of Georgia, Athens, GA, 30602, USA
| | - John Glushka
- Department of Biochemistry and Complex Carbohydrate Research Center, University of Georgia, Athens, GA, 30602, USA
| | - Arthur S Edison
- Department of Biochemistry and Complex Carbohydrate Research Center, University of Georgia, Athens, GA, 30602, USA
| | - Elizabeth B Kujawinski
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA
| | - Mary Ann Moran
- Department of Marine Sciences, University of Georgia, Athens, GA, 30602, USA.
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