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Kuś PM, Rola R. LC-QqQ-MS/MS methodology for determination of purine and pyrimidine derivatives in unifloral honeys and application of chemometrics for their classification. Food Chem 2021; 348:129076. [PMID: 33503535 DOI: 10.1016/j.foodchem.2021.129076] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/26/2020] [Accepted: 01/07/2021] [Indexed: 11/15/2022]
Abstract
The new liquid chromatographic-triple quadrupole tandem mass spectrometry (LC-QqQ-MS/MS) method for determination of purine and pyrimidine derivatives in honey produced by Apis mellifera was developed. 13 compounds were determined in total of 130 unifloral honey samples of 13 varieties: uracil, thymine, thymidine, xanthine, guanine, adenine, uridine, pseudouridine, xanthosine, inosine, hypoxanthine, guanosine and cytidine. The levels of some of these compounds varied between the specific honey types. The most abundant were uridine (up to 44.66 mg/kg), xanthine (up to 20.48 mg/kg) and xanthosine (up to 19.22 mg/kg). The data were evaluated by principal component analysis (PCA) and k-nearest neighbors (k-NN) classification (selected 9 and 8 honey types, respectively) to examine differences between the honey varieties allowing their discrimination based on purine and pyrimidine derivatives amounts. The data allowed to distinguish between 8 honey types (balanced accuracy 82%) and for most of the varieties obtained classification rates ranged from 96 to 100%.
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Affiliation(s)
- Piotr M Kuś
- Department of Pharmacognosy and Herbal Medicines, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland.
| | - Rafał Rola
- Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100 Torun, Poland; Masdiag Laboratory, Żeromskiego 33, 01-882 Warsaw, Poland.
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2
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Fabrication of spherical silica amino-functionalized microporous organic network composites for high performance liquid chromatography. Talanta 2021; 221:121570. [DOI: 10.1016/j.talanta.2020.121570] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 01/30/2023]
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3
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Gao K, Liu Z, Chen J, Chen L, Qi Y, Wang Z, Sun Y. Effects of different substrates on low-temperature storage of fresh ginseng. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:6258-6266. [PMID: 31250451 DOI: 10.1002/jsfa.9899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 06/24/2019] [Accepted: 06/24/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Fresh ginseng was buried in three types of sand with different moisture contents and three types of soil and then stored at 2 °C to determine the effects of these storage substrates on fresh ginseng. RESULTS At a storage time of 200 days, ginseng stored in underforest soil softened the most slowly and had a significantly greater firmness compared to the other samples (P < 0.05). The amount of most ginsenosides changed after storage for most of the substrates. Samples stored in ginseng soil and biological fertilizer had the highest concentration of total saponin and ginseng polysaccharides, respectively. Fresh ginseng stored in medium-water content sand had a significantly lower polyphenol oxidase activity (P < 0.05). A significant difference was observed in the total concentration of nucleosides and nucleobases between the ginseng samples stored with and without substrates (P < 0.05). CONCLUSION The data obtained in the present study suggest that the use of storage substrates is an optimal method for extending the shelf life of fresh ginseng without detrimental effects on its components. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Kun Gao
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
| | - Zhengbo Liu
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
| | - Jianbo Chen
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
| | - Lixue Chen
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
- College of Chinese Material Medicine, Jilin Agricultural University, Changchun, China
| | - Yuli Qi
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
- College of Chinese Material Medicine, Jilin Agricultural University, Changchun, China
| | - Zeshuai Wang
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
| | - Yinshi Sun
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin, China
- College of Chinese Material Medicine, Jilin Agricultural University, Changchun, China
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Kambhampati S, Li J, Evans BS, Allen DK. Accurate and efficient amino acid analysis for protein quantification using hydrophilic interaction chromatography coupled tandem mass spectrometry. PLANT METHODS 2019; 15:46. [PMID: 31110556 PMCID: PMC6511150 DOI: 10.1186/s13007-019-0430-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/25/2019] [Indexed: 05/12/2023]
Abstract
BACKGROUND Methods used to quantify protein from biological samples are often inaccurate with significant variability that requires care to minimize. The errors result from losses during protein preparation and purification and false detection of interfering compounds or elements. Amino acid analysis (AAA) involves a series of chromatographic techniques that can be used to measure protein levels, avoiding some difficulties and providing specific compositional information. However, unstable derivatives, that are toxic and can be costly, incomplete reactions, inadequate chromatographic separations, and the lack of a single hydrolysis method with sufficient recovery of all amino acids hinder precise protein quantitation using AAA. RESULTS In this study, a hydrophilic interaction chromatography based method was used to separate all proteinogenic amino acids, including isobaric compounds leucine and isoleucine, prior to detection by multiple reaction monitoring with LC-MS/MS. Through inclusion of commercially available isotopically labeled (13C, 15N) amino acids as internal standards we adapted an isotopic dilution strategy for amino acid-based quantification of proteins. Three hydrolysis methods were tested with ubiquitin, bovine serum albumin, (BSA), and a soy protein biological reference material (SRM 3234; NIST) resulting in protein estimates that were 86-103%, 82-94%, and 90-99% accurate for the three protein samples respectively. The methane sulfonic acid hydrolysis approach provided the best recovery of labile amino acids including: cysteine, methionine and tryptophan that are challenging to accurately quantify. CONCLUSIONS Accurate determination of protein quantity and amino acid composition in heterogeneous biological samples is non-trivial. Recent advances in chromatographic phases and LC-MS/MS based methods, along with the availability of isotopic standards can minimize difficulties in analysis and improve protein quantitation. A robust method is described for high-throughput protein quantification and amino acid compositional analysis. Since accurate measurement of protein quality and quantity are a requirement for many biological studies that relate to crop improvement or more generally, our understanding of metabolism in living systems, we envision this method will have broad applicability.
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Affiliation(s)
| | - Jia Li
- Donald Danforth Plant Science Center, St. Louis, MO USA
| | | | - Doug K. Allen
- Donald Danforth Plant Science Center, St. Louis, MO USA
- United States Department of Agriculture, Agricultural Research Service, St. Louis, MO USA
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5
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Chromatographic Fingerprint and Quantitative Analysis of Commercial Pheretima aspergillum (Guang Dilong) and Its Adulterants by UPLC-DAD. Int J Anal Chem 2019; 2019:4531092. [PMID: 30728838 PMCID: PMC6343145 DOI: 10.1155/2019/4531092] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 12/05/2018] [Accepted: 12/25/2018] [Indexed: 12/24/2022] Open
Abstract
Guang Dilong is a Traditional Chinese Medicine prepared from the dried body of Pheretima aspergillum (E. Perrier), a species of earthworm. However, preparations of Guang Dilong may be adulterated by other species and a method of quality control is needed. A method was developed to analyze and authenticate commercial Guang Dilong, utilizing ultra-high performance liquid chromatography (UHPLC) coupled with diode array detection (DAD). Equipment included an Acquity UPLC HSS T3 column (100 mm × 2.1 mm, 1.8 μm). The mobile phase consisted of acetonitrile and 0.01% formic acid, pumped at 0.3 mL/min. Wavelength detection was at 260 nm. Twenty-two batches of confirmed P. aspergillum samples (reference) from different sources and 20 batches of adulterated samples were analyzed to establish a reference fingerprint for commercial Guang Dilong. Five peaks in the fingerprints of the reference batches were identified as characteristic; six characteristic peaks in the fingerprints of the adulterants were identified by comparing their retention time with those of the references. The total 42 batches of samples were compared with the reference fingerprint, and the fingerprints of the P. aspergillum samples were similar. The UHPLC-DAD method can simultaneously determine the contents of six compounds (hypoxanthine, xanthine, uridine, inosine, guanosine, and adenosine) in the reference and adulterated batches. The six compounds showed good regression (r > 0.9999) within test ranges. The recovery (accuracy) was 98.25 to 101.68%, with relative standard deviation <2.67%. In summary, this UHPLC-DAD method combines chromatographic fingerprint with quantification analysis and could be readily used as an efficient quality control method for Guang Dilong.
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Rastegar L, Mighani H, Ghassempour A. A comparison and column selection of Hydrophilic Interaction Liquid Chromatography and Reversed-Phase High-Performance Liquid Chromatography for detection of DNA methylation. Anal Biochem 2018; 557:123-130. [PMID: 30030996 DOI: 10.1016/j.ab.2018.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 07/11/2018] [Accepted: 07/16/2018] [Indexed: 01/08/2023]
Abstract
5-methylcytosine (5mC) is an epigenetic mark which has a profound effect on various fundamental processes in cells. In present study, at first Hydrophilic Interaction Liquid Chromatography (HILIC) was compared with Reversed-Phase High-Performance Liquid Chromatography (RP-HPLC) based on their selectivity (α), retention factor (k), and resolution (R) for cytosine (C) and 5mC nucleobases. We tried to justify the separation mechanism on the basis of mobile phase and solute polarity, structural characterization of solute and stationary phases, log Do/w, and pka under both modes. Then, these two modes were compared in order to select the best column for measurement of methylation level in two real samples with less analytical complexity (i.e. animal and bacteria) and a highly complex sample (i.e. plant), after chemical hydrolysis of DNA. In this favor, diol and cyano (CN) columns in HILIC mode as well as C8 and C18 in RP-HPLC were investigated. Optimum separation and the best validation parameters were obtained for CN column with Limit of Detection (LOD) of 1.4 pmol and Limit of Quantification (LOQ) of 4.8 pmol for 5mC. When the CN column was used in HILIC-UV procedure, separation of 5mC and C bases was achieved in all types of hydrolyzed DNA solutions.
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Affiliation(s)
- Leila Rastegar
- Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran
| | - Hossein Mighani
- Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran
| | - Alireza Ghassempour
- Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G.C. Evin, Tehran, Iran.
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7
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Wang Y, Zhang F, Miao P, Li H, Tu Y. An Electrochemiluminescent Platform for Living Cell Oxygen Metabolism Monitoring. JOURNAL OF ANALYSIS AND TESTING 2018. [DOI: 10.1007/s41664-018-0058-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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8
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Gao K, Chen J, Wang Y, Qi Y, Chen L, Li S, Sun Y. Effects of 60Co-γ and Electron Beam Irradiation on Storage Quality of Panax ginseng. FOOD BIOPROCESS TECH 2018. [DOI: 10.1007/s11947-018-2108-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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Yang XN, Li CS, Chen C, Tang XY, Cheng GQ, Li X. Protective effect of Shouwu Yizhi decoction against vascular dementia by promoting angiogenesis. Chin J Nat Med 2017; 15:740-750. [PMID: 29103459 DOI: 10.1016/s1875-5364(17)30105-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 02/06/2023]
Abstract
Shouwu is a traditional Chinese medicine (TCM) with neuroprotective effect. Shouwu Yizhi decoction (SYD) was designed based on TCM theory. However, little is known about the roles of SYD in Vascular dementia (VaD). The present study aimed to evaluate the potential effects of SYD on the vascular cognitive impairment and explore the underlying mechanism by establishing focal cerebral ischemia/reperfusion (I/R) rat model to induce VaD. SYD administration (54 mg·kg-1) for 40 days obviously improved the vascular cognitive impairment in the middle cerebral artery occlusion (MCAO) rats as evidenced by the declined neurological deficit score and shortened escape latency via neurological deficit assessment and Morris water maze test. Moreover, SYD decreased neuron damage-induced cell death and ameliorated the ultrastructure of endothelial cells in the MCAO rats, thereby alleviating VaD. Mechanistically, SYD caused increases in the expression of vascular endothelial growth factor (VEGF), CD34 and CD31, compared with the MCAO rats in coronal hippocampus. Simultaneously, the expression level of miR-210 was elevated significantly after SYD administration, compared with the vehicle rats (P < 0.01). The expression of Notch 4 at both mRNA and protein levels was upregulated remarkably along with the notably downregulated DLL4 expression under SYD administration compared with the vehicle rats (P < 0.05). Overall, the above results indicated that SYD promoted angiogenesis by upregulating VEGF-induced miR210 expression to activate Notch pathway, and further alleviated neuron damage and ameliorated the ultrastructure of endothelial cells in the MCAO rats, ultimately enhancing the cognition and memory of MCAO rats. Therefore, our findings preliminarily identified the effect and the mechanism of action for SYD on VaD in rats. SYD could be a potential candidate in treatment of VaD.
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Affiliation(s)
- Xiao-Ni Yang
- Department of Tranditional Chinese Medicine Shandong Qianfoshan Hospital, Jinan 250014, China
| | - Chang-Sheng Li
- Department of Tranditional Chinese Medicine Shandong Qianfoshan Hospital, Jinan 250014, China
| | - Chao Chen
- Department of Tranditional Chinese Medicine Shandong Qianfoshan Hospital, Jinan 250014, China
| | - Xiao-Yong Tang
- Department of Internal Medicine VIII, Shandong Tumor Hospital, Jinan 250014, China
| | - Guang-Qing Cheng
- Department of Tranditional Chinese Medicine Shandong Qianfoshan Hospital, Jinan 250014, China.
| | - Xia Li
- Key Laboratory for Tumor Immunology and Traditional Chinese Medicine Immunology Institute of Basic Medicine Shandong Academy of Medical Sciences, Jinan 250062, China.
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10
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Huang Y, Zhang T, Zhao Y, Zhou H, Tang G, Fillet M, Crommen J, Jiang Z. Simultaneous analysis of nucleobases, nucleosides and ginsenosides in ginseng extracts using supercritical fluid chromatography coupled with single quadrupole mass spectrometry. J Pharm Biomed Anal 2017; 144:213-219. [DOI: 10.1016/j.jpba.2017.03.059] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 03/20/2017] [Accepted: 03/29/2017] [Indexed: 11/29/2022]
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11
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Zhang S, Lu J, Wang S, Mao D, Miao S, Ji S. Multi-mycotoxins analysis in Pheretima using ultra-high-performance liquid chromatography tandem mass spectrometry based on a modified QuEChERS method. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1035:31-41. [DOI: 10.1016/j.jchromb.2016.09.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 12/22/2022]
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12
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Chinese Medicinal Leech: Ethnopharmacology, Phytochemistry, and Pharmacological Activities. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:7895935. [PMID: 27274755 PMCID: PMC4870366 DOI: 10.1155/2016/7895935] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/22/2016] [Indexed: 11/21/2022]
Abstract
Hirudo (Shuizhi in Chinese) is an important Chinese medicine, which possesses many therapeutic properties for the treatment of the cerebral hemorrhage and other thrombosis-related diseases. The phytochemical investigation gave more than 51 compounds including pteridines, phosphatidylcholines, glycosphingolipids, and sterols, as well as some bioactive peptides from the Shuizhi derived from three animal species recorded in the current Chinese Pharmacopoeia. The pharmacological studies on the Shuizhi have revealed various activities such as anticoagulation, antithrombosis, antiatherosclerosis, antiplatelet aggregation, antitumor and anti-inflammatory as well as hemorheology improvement, and protective effects against cerebral ischemia-reperfusion injury. However, some important issues based on the traditional uses of Shuizhi are still not clear. The aim of the present review is to provide comprehensive knowledge on the ethnopharmacology, phytochemistry, and pharmacological activities of Shuizhi. It will provide a potential guidance in exploring main active compounds of Shuizhi and interpreting the action mechanism for the further research.
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13
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Ge Y, Tang Y, Guo S, Liu X, Zhu Z, Zhang L, Liu P, Ding S, Lin X, Lin R, Duan JA. Simultaneous Quantitation of Free Amino Acids, Nucleosides and Nucleobases in Sipunculus nudus by Ultra-High Performance Liquid Chromatography with Triple Quadrupole Mass Spectrometry. Molecules 2016; 21:408. [PMID: 27023507 PMCID: PMC6273726 DOI: 10.3390/molecules21040408] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/21/2016] [Accepted: 03/23/2016] [Indexed: 01/16/2023] Open
Abstract
To evaluate the nutritional and functional value of Sipunculus nudus, a rapid, simple and sensitive analytical method was developed using ultra-high performance liquid chromatography coupled with a triple quadrupole mass detection in multiple-reaction monitoring mode for the simultaneous quantitative determination of 25 free amino acids and 16 nucleosides and nucleobases in S. nudus within 20 min, which was confirmed to be reproducible and accurate. The limits of detection (LODs) and quantification (LOQs) were between 0.003–0.229 μg/mL and 0.008–0.763 μg/mL for the 41 analytes, respectively. The established method was applied to analyze 19 batches of S. nudus samples from four habitats with two different processing methods. The results showed that S. nudus contained a variety of free amino acids, nucleosides and nucleobases in sufficient quantity and reasonable proportion. They also demonstrated that the contents of these compounds in different parts of S. nudus were significantly discriminating, which were in the order: (highest) coelomic fluid > body wall > intestine (lowest). The method is simple and accurate, and could serve as a technical support for establishing quality control of S. nudus and other functional seafoods. Moreover, the research results also laid foundation for further exploitation and development of S. nudus.
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Affiliation(s)
- Yahui Ge
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Yuping Tang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Sheng Guo
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Xin Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Zhenhua Zhu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Lili Zhang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Pei Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Shaoxiong Ding
- College of Ocean and Environment, Xiamen University, Xiamen 361005, China.
| | - Xiangzhi Lin
- Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Rurong Lin
- Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Jin-ao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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14
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Long Z, Guo Z, Liu X, Zhang Q, Liu X, Jin Y, Liang L, Li H, Wei J, Wu N. A sensitive non-derivatization method for apramycin and impurities analysis using hydrophilic interaction liquid chromatography and charged aerosol detection. Talanta 2016; 146:423-9. [DOI: 10.1016/j.talanta.2015.09.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 08/28/2015] [Accepted: 09/06/2015] [Indexed: 11/29/2022]
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15
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Kim HS, Lee AY, Choi G, Kang YM, Kim HK. Development of Ultra-Performance Liquid Chromatography Method Using Hydrophilic Interaction Liquid Chromatography for Quantification of Azetidine-2-Carboxylic Acid in Rhizomes of Polygonatum sibiricum F. Delaroche. J LIQ CHROMATOGR R T 2015. [DOI: 10.1080/10826076.2015.1057643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Hyo Seon Kim
- K-Herb Research Center, Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseongdae-ro, Daejeon, Republic of Korea
| | - A Yeong Lee
- K-Herb Research Center, Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseongdae-ro, Daejeon, Republic of Korea
| | - Goya Choi
- K-Herb Research Center, Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseongdae-ro, Daejeon, Republic of Korea
| | - Young Min Kang
- K-Herb Research Center, Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseongdae-ro, Daejeon, Republic of Korea
| | - Ho Kyoung Kim
- Mibyeong Research Center, Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseongdae-ro, Daejeon, Republic of Korea
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16
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Zhou G, Wang M, Xu R, Li XB. Chemometrics for comprehensive analysis of nucleobases, nucleosides, and nucleotides in Siraitiae Fructus by hydrophilic interaction ultra high performance liquid chromatography coupled with triple-quadrupole linear ion-trap tandem mass spectrometry. J Sep Sci 2015; 38:3508-15. [PMID: 26249158 DOI: 10.1002/jssc.201500680] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 07/22/2015] [Accepted: 07/28/2015] [Indexed: 12/21/2022]
Abstract
A rapid and sensitive hydrophilic interaction ultra high performance liquid chromatography coupled with triple-quadrupole linear ion-trap tandem mass spectrometry method was validated for the simultaneous determination of 20 nucleobases, nucleosides, and nucleotides (within 3.5 min), and then was employed to test the functional food of Luo-Han-Guo samples. The analysis showed that the Luo-Han-Guo was rich in guanosine and uridine, but contained trace levels of the other target compounds. Chemometrics methods were employed to identify 40 batches of Luo-Han-Guo samples from different cultivated forms, regions and varieties. Unsupervised hierarchical cluster analysis and principal component analysis were used to classify Luo-Han-Guo samples based on the level of the 20 target compounds, and the supervised learning method of counter propagation artificial neural network was utilized to further separate clusters and validate the established model. As a result, the samples could be clustered into three primary groups, in which correlation with cultivated varieties was observed. The present strategy could be applied to the investigation of other edible plants containing nucleobases, nucleosides, or nucleotides.
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Affiliation(s)
- Guisheng Zhou
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Mengyue Wang
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Renjie Xu
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiao-Bo Li
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China
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Hartmann A, Albert A, Ganzera M. Effects of elevated ultraviolet radiation on primary metabolites in selected alpine algae and cyanobacteria. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2015; 149:149-55. [PMID: 26065817 PMCID: PMC4509709 DOI: 10.1016/j.jphotobiol.2015.05.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/22/2015] [Accepted: 05/25/2015] [Indexed: 12/02/2022]
Abstract
Extremophilic green algae and cyanobacteria are the most abundant species in high mountain habitats, where rough climate conditions such as temperature differences, limited water retention and high ultraviolet (UV) radiation are the cause for a restricted biological diversity in favor of a few specialized autotrophic microorganisms. In this study, we investigated four algal species from alpine habitat in a sun simulator for their defense strategies in response to UV-A radiation (315-400nm) up to 13.4W/m(2) and UV-B radiation (280-315nm) up to 2.8W/m(2). Besides changes in pigment composition we discovered that primary polar metabolites like aromatic amino acids, nucleic bases and nucleosides are increasingly produced when the organisms are exposed to elevated UV radiation. Respective compounds were isolated and identified, and in order to quantify them an HPLC-DAD method was developed and validated. Our results show that especially tyrosine and guanosine were found to be generally two to three times upregulated in the UV-B exposed samples compared to the non-treated control.
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Affiliation(s)
- Anja Hartmann
- Institute of Pharmacy, Pharmacognosy, University of Innsbruck, 6020 Innsbruck, Austria
| | - Andreas Albert
- Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, Helmholtz Center Munich, 85764 Neuherberg, Germany
| | - Markus Ganzera
- Institute of Pharmacy, Pharmacognosy, University of Innsbruck, 6020 Innsbruck, Austria.
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18
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Liu R, Duan JA, Chai C, Wen H, Guo S, Wang X, Zhang Y, Wu H, Zhou M, Chen T, Shaw C. Hydrophilic Interaction Ultra-High Performance Liquid Chromatography Coupled with Triple-Quadrupole Mass Spectrometry for Determination of Nucleosides and Nucleobases in Animal Horns. J LIQ CHROMATOGR R T 2015. [DOI: 10.1080/10826076.2015.1025142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Rui Liu
- National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Key Laboratory of Research and Development in Marine Bio-resource Pharmaceutics, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Jin-ao Duan
- National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Chuan Chai
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Hongmei Wen
- Jiangsu Key Laboratory of Research and Development in Marine Bio-resource Pharmaceutics, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Sheng Guo
- National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Xinzhi Wang
- Jiangsu Key Laboratory of Research and Development in Marine Bio-resource Pharmaceutics, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Yang Zhang
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Hao Wu
- National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Key Laboratory of Research and Development in Marine Bio-resource Pharmaceutics, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Mei Zhou
- Natural Drug Discovery Research Group, School of Pharmacy, Medical Biology Centre, Queen’s University, Belfast, Northern Ireland, UK
| | - Tianbao Chen
- Natural Drug Discovery Research Group, School of Pharmacy, Medical Biology Centre, Queen’s University, Belfast, Northern Ireland, UK
| | - Chris Shaw
- Natural Drug Discovery Research Group, School of Pharmacy, Medical Biology Centre, Queen’s University, Belfast, Northern Ireland, UK
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Dereplication of known nucleobase and nucleoside compounds in natural product extracts by capillary electrophoresis-high resolution mass spectrometry. Molecules 2015; 20:5423-37. [PMID: 25822081 PMCID: PMC6272742 DOI: 10.3390/molecules20045423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/16/2015] [Accepted: 03/19/2015] [Indexed: 12/15/2022] Open
Abstract
Nucleobase and nucleoside compounds exist widely in various organisms. An often occurring problem in the discovery of new bioactive compounds from natural products is reisolation of known nucleobase and nucleoside compounds. To resolve this problem, a capillary electrophoresis-high resolution mass spectrometry (CE-HR-MS) method providing both rapid separation and accurate mass full-scan MS data was developed for the first time to screen and dereplicate known nucleobase and nucleoside compounds in crude extracts of natural products. Instrumental parameters were optimized to obtain optimum conditions for CE separation and electrospray ionization-time-of-flight mass spectrometry (ESI-TOF/MS) detection. The proposed method was verified to be precise, reproducible, and sensitive. Using this method, known nucleobase and nucleoside compounds in different marine medicinal organisms including Syngnathus acus Linnaeus; Hippocampusjaponicus Kaup and Anthopleura lanthogrammica Berkly were successfully observed and identified. This work demonstrates that CE-HR-MS combined with an accurate mass database may be used as a powerful tool for dereplicating known nucleobase and nucleoside compounds in different types of natural products. Rapid dereplication of known nucleobase and nucleoside compounds allows researchers to focus on other leads with greater potential to yield new substances.
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20
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Song Q, Song Y, Zhang N, Li J, Jiang Y, Zhang K, Zhang Q, Tu P. Potential of hyphenated ultra-high performance liquid chromatography-scheduled multiple reaction monitoring algorithm for large-scale quantitative analysis of traditional Chinese medicines. RSC Adv 2015. [DOI: 10.1039/c5ra09429a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The combination of a core–shell ADME column with a sMRM algorithm offers the potential for large-scale quantitative analysis of the components in TCMs by providing not only high quality quantitative signals but also reliable MS2 spectra.
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Affiliation(s)
- Qingqing Song
- Modern Research Center for Traditional Chinese Medicine
- Beijing University of Chinese Medicine
- Beijing 100029
- China
- School of Chinese Materia Medica
| | - Yuelin Song
- Modern Research Center for Traditional Chinese Medicine
- Beijing University of Chinese Medicine
- Beijing 100029
- China
| | - Na Zhang
- Modern Research Center for Traditional Chinese Medicine
- Beijing University of Chinese Medicine
- Beijing 100029
- China
- School of Chinese Materia Medica
| | - Jun Li
- Modern Research Center for Traditional Chinese Medicine
- Beijing University of Chinese Medicine
- Beijing 100029
- China
| | - Yong Jiang
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Kerong Zhang
- Application Support Center
- AB SCIEX
- Shanghai 200233
- China
| | - Qian Zhang
- Modern Research Center for Traditional Chinese Medicine
- Beijing University of Chinese Medicine
- Beijing 100029
- China
| | - Pengfei Tu
- Modern Research Center for Traditional Chinese Medicine
- Beijing University of Chinese Medicine
- Beijing 100029
- China
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21
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Hydrophilic interaction ultra-performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (HILIC-UPLC–TQ-MS/MS) in multiple-reaction monitoring (MRM) for the determination of nucleobases and nucleosides in ginkgo seeds. Food Chem 2014; 150:260-6. [DOI: 10.1016/j.foodchem.2013.10.143] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 09/15/2013] [Accepted: 10/26/2013] [Indexed: 11/22/2022]
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22
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Yao X, Zhou G, Tang Y, Guo S, Qian D, Duan JA. HILIC-UPLC-MS/MS combined with hierarchical clustering analysis to rapidly analyze and evaluate nucleobases and nucleosides inGinkgo bilobaleaves. Drug Test Anal 2014; 7:150-7. [DOI: 10.1002/dta.1634] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 01/15/2014] [Accepted: 02/10/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Xin Yao
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; Nanjing University of Chinese Medicine; Nanjing 210046 China
- Department of Pharmacy; First Affiliated Hospital of Soochow University; Suzhou 215006 China
| | - Guisheng Zhou
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; Nanjing University of Chinese Medicine; Nanjing 210046 China
| | - Yuping Tang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; Nanjing University of Chinese Medicine; Nanjing 210046 China
| | - Sheng Guo
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; Nanjing University of Chinese Medicine; Nanjing 210046 China
| | - Dawei Qian
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; Nanjing University of Chinese Medicine; Nanjing 210046 China
| | - Jin-ao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; Nanjing University of Chinese Medicine; Nanjing 210046 China
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23
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Pan Y, Li J, Li X, Chen J, Bai G. Determination of Free Amino Acids in Isatidis Radix By HILIC-UPLC-MS/MS. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.1.197] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Li F, Duan JA, Qian D, Guo S, Ding Y, Liu X, Qian Y, Peng Y, Ren Y, Chen Y. Comparative analysis of nucleosides and nucleobases from different sections of Elaphuri Davidiani Cornu and Cervi Cornu by UHPLC–MS/MS. J Pharm Biomed Anal 2013; 83:10-8. [DOI: 10.1016/j.jpba.2013.04.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 04/04/2013] [Accepted: 04/06/2013] [Indexed: 11/16/2022]
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25
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Wang H, Duan JA, Guo S, Qian D, Shang E. Development and validation of a hydrophilic interaction ultra-high-performance liquid chromatography with triple quadrupole MS/MS for the absolute and relative quantification of amino acids in Sophora alopecuroides
L.†. J Sep Sci 2013; 36:2244-52. [DOI: 10.1002/jssc.201300266] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 04/22/2013] [Accepted: 04/23/2013] [Indexed: 12/23/2022]
Affiliation(s)
- Hanqing Wang
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae; Nanjing University of Chinese Medicine; Nanjing P. R. China
- College of Pharmacy; Ningxia Medical University; Yinchuan Ningxia P. R China
| | - Jin-ao Duan
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae; Nanjing University of Chinese Medicine; Nanjing P. R. China
| | - Sheng Guo
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae; Nanjing University of Chinese Medicine; Nanjing P. R. China
| | - Dawei Qian
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae; Nanjing University of Chinese Medicine; Nanjing P. R. China
| | - Erxin Shang
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae; Nanjing University of Chinese Medicine; Nanjing P. R. China
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26
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Guo S, Duan JA, Qian D, Wang H, Tang Y, Qian Y, Wu D, Su S, Shang E. Hydrophilic interaction ultra-high performance liquid chromatography coupled with triple quadrupole mass spectrometry for determination of nucleotides, nucleosides and nucleobases in Ziziphus plants. J Chromatogr A 2013; 1301:147-55. [PMID: 23800804 DOI: 10.1016/j.chroma.2013.05.074] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 05/20/2013] [Accepted: 05/29/2013] [Indexed: 02/06/2023]
Abstract
In this study, a rapid and sensitive analytical method was developed for the determination of 20 nucleobases, nucleosides and nucleotides in Ziziphus plants at trace levels by using hydrophilic interaction ultra-high performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (HILIC-UHPLC-TQ-MS/MS) in multiple-reaction monitoring (MRM) mode. Under the optimized chromatographic conditions, good separation for 20 target compounds were obtained on a UHPLC Amide column with sub-2μm particles within 10min. The overall LODs and LOQs were between 0.11-3.12ngmL(-1) and 0.29-12.48ngmL(-1) for the 20 analytes, respectively. It is the first report about simultaneous analysis of nucleobases, nucleosides and nucleotides in medicinal plants using HILIC-UHPLC-TQ-MS/MS method, which affords good linearity, precision, repeatability and accuracy. The developed method was successfully applied to Ziziphus plant (Z. jujuba, Z. jujuba var. spinosa and Z. mauritiana) samples. The analysis showed that the fruits and leaves of Ziziphus plants are rich in nucleosides and nucleobases as well as nucleotides, and could be selected as the healthy food resources. Our results in present study suggest that HILIC-UHPLC-TQ-MS/MS method could be employed as a useful tool for quality assessment of the samples from the Ziziphus plants as well as other medicinal plants or food samples using nucleotides, nucleosides and nucleobases as markers.
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Affiliation(s)
- Sheng Guo
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, China
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27
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García-Gómez D, Rodríguez-Gonzalo E, Carabias-Martínez R. Stationary phases for separation of nucleosides and nucleotides by hydrophilic interaction liquid chromatography. Trends Analyt Chem 2013. [DOI: 10.1016/j.trac.2013.02.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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28
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Guo S, Duan JA, Qian D, Tang Y, Qian Y, Wu D, Su S, Shang E. Rapid determination of amino acids in fruits of Ziziphus jujuba by hydrophilic interaction ultra-high-performance liquid chromatography coupled with triple-quadrupole mass spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:2709-19. [PMID: 23413770 DOI: 10.1021/jf305497r] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
In this study, a sensitive and rapid method for the simultaneous determination of free amino acids without derivatization using hydrophilic interaction liquid chromatography coupled with tandem mass spectrometry (HILIC-MS/MS) was developed. The method was performed on an ultra-high-performance liquid chromatography (UHPLC) separation system coupled with a triple-quadrupole mass spectrometry (TQ-MS) instrument. Sufficient separation of 23 underivatized amino acids was achieved on an Acquity BEH Amide column (2.1 mm × 100 mm, 1.7 μm) in a single run of 12 min. Then the method was applied for the analysis of the free amino acids in 46 batches of Ziziphus jujuba fruits which comprised 39 cultivars from 26 cultivation regions. Multivariate statistical analysis was also used to investigate the differences in free amino acid profiles among the samples. This study showed that HILIC-UHPLC-TQ-MS is an effective technique to analyze underivatized amino acids in the food samples.
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Affiliation(s)
- Sheng Guo
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae and ‡Research Center of Basic Medical College, Nanjing University of Chinese Medicine , Nanjing 210046, People's Republic of China
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29
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Chester TL. Recent Developments in High-Performance Liquid Chromatography Stationary Phases. Anal Chem 2012; 85:579-89. [DOI: 10.1021/ac303180y] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Thomas L. Chester
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati,
Ohio 45221-0172, United States
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30
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Zhang L, Dai X, Xu F, Wang F, Gong B, Wei Y. Preparation of imidazole-functionalized silica by surface-initiated atom transfer radical polymerization and its application for hydrophilic interaction chromatography. Anal Bioanal Chem 2012; 404:1477-84. [PMID: 22772141 DOI: 10.1007/s00216-012-6210-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 06/11/2012] [Accepted: 06/18/2012] [Indexed: 10/28/2022]
Abstract
A novel imidazole-functionalized stationary phase for hydrophilic interaction chromatography (HILIC) was prepared via surface-initiated atom transfer radical polymerization (SI-ATRP). 1-Vinylimidazole as a monomer was polymerized on the surface of initiator-immobilized silica by SI-ATRP using CuCl and 2,2'-bipyridyl as a catalyst. The graft chain length and polymer grafting density were controlled by varying the ratio of monomer to initiator. The resulting materials were characterized by elemental analysis and thermogravimetric analysis. Then, high-performance liquid chromatography separation of eight nucleobases/nucleosides was performed on the imidazole-functionalized chromatographic column in HILIC mode. The effects of mobile phase composition, buffer pH, and column temperature on the separation of nucleobases/nucleosides were investigated, and the retention mechanisms were studied. Chromatographic parameters were calculated, and the results showed that surface adsorption through hydrogen bonding and electrostatic interaction dominated the retention behavior of the solutes in HILIC mode. Lastly, the stationary phase was successfully used to determine the nucleobases and nucleosides from Cordyceps militaris.
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Affiliation(s)
- Lei Zhang
- Key Laboratory of Energy & Chemical Engineering, Ningxia University, Yinchuan, China
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31
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Marrubini G, Fattorini P, Previderé C, Goi S, Sorçaburu Cigliero S, Grignani P, Serra M, Biesuz R, Massolini G. Experimental design applied to the optimization of microwave-assisted DNA hydrolysis. J Chromatogr A 2012; 1249:8-16. [PMID: 22749458 DOI: 10.1016/j.chroma.2012.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 06/05/2012] [Accepted: 06/07/2012] [Indexed: 10/28/2022]
Abstract
The assessment of the integrity of the DNA primary structure and the identification of canonical and modified bases are useful tools in medical, pharmaceutical, and forensic applications. In this article we report on the first microwave-assisted hydrolyses of deoxyribonucleoside-triphosphates (dNTPs) and human DNA using "Design of Experiments" methodology. We use hydrophilic interaction chromatography (HILIC) and UV detection at 260 nm for the determination of purinic and pyrimidinic bases at levels of 0.5 μM. We use a ZIC-HILIC 150mm × 2.1 mm i.d., 5 μm particle size column and ammonium formate buffers in acetonitrile for gradient separation of the analytes. We then compare the final concentrations of Thymine, Adenine, Cytosine, and Guanine with the nominal amounts of such bases in the dNTPs and DNA submitted to hydrolysis. After optimization of the hydrolysis (11.5 min, 0.15 M aqueous HCl, 150 °C), the method turns out to be suitable for the determination of products released from quantities of human DNA as low as 500 ng with precision (RSD<10%) and accuracy (REC 97-104%). These results confirm that the kinetics of the release of the bases depends on their molecular structure and show that the concentration of the substrate plays a relevant role. We conclude with a discussion of the method and a comparison to the methods described in previous studies.
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Affiliation(s)
- Giorgio Marrubini
- Department of Drug Sciences, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy.
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32
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Chen Y, Bicker W, Wu J, Xie M, Lindner W. Simultaneous determination of 16 nucleosides and nucleobases by hydrophilic interaction chromatography and its application to the quality evaluation of Ganoderma. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:4243-4252. [PMID: 22500559 DOI: 10.1021/jf300076j] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In order to develop a simple, efficient, and sensitive method for comprehensive analysis of the nucleosides and nucleobases in natural products, a zwitterionic hydrophilic interaction chromatography (ZIC-HILIC) method for the simultaneous determination of 16 nucleosides and nucleobases has been studied. A mechanistic study confirmed that ZIC-HILIC separation showed a mixed-mode effect of both hydrophilic and electrostatic interactions. This method was validated to be precise, accurate, and sensitive with overall precision (intra- and interday) less than 1.8% (RSD), and LOD and LOQ was in the range of 0.005-0.029 μg/mL and 0.018-0.096 μg/mL, respectively. With this method, the nucleosides and nucleobases in Ganoderma of different species (G. atrum, G. lucidum, and G. sinense) and origins were quantified. The results showed that the contents varied with the species and origins. With the aid of hierarchical cluster analysis (HCA), cultivated Ganoderma from different origins and species were successfully discriminated. It is for the first time that the content of nucleosides and nucleobases in G. atrum is reported and compared. Our data showed that HILIC had advantages as a useful and potential tool for the study of the bioactive components in Ganoderma as well as their quality control, and could therefore be used for the determination of the analytes in other natural products.
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Affiliation(s)
- Yi Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. of China
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33
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Xiuhua W, Chao L, Yifeng T. Microemulsion-enhanced electrochemiluminescence of luminol-H2O2 for sensitive flow injection analysis of antioxidant compounds. Talanta 2012; 94:289-94. [DOI: 10.1016/j.talanta.2012.03.042] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/19/2012] [Accepted: 03/22/2012] [Indexed: 11/15/2022]
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