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Meng X, Zhang T, Li Y, Pan Q, Jiang J, Luo Y, Chong L, Yang Y, Xu S, Zhou L, Sun Z. Development and application of an analytical method for curdione quantification in pregnant Sprague-Dawley rats by LC-MS/MS. Biomed Chromatogr 2015; 29:1499-505. [PMID: 25736727 DOI: 10.1002/bmc.3449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 01/09/2015] [Accepted: 01/18/2015] [Indexed: 11/06/2022]
Abstract
The vaginal administration route suffers from relatively low absorption efficiency, which may hinder the identification of the toxicokinetics of curdione in pregnant women. A sensitive analytical method for determining the plasma concentration of curdione was developed and applied in the determination of curdione in pregnant Sprague-Dawley rats as a simulated model. Glimepiride was used as an internal standard and chromatographic separation was achieved on a Capcell Pak C18 MGIII column. A gradient elution profile with 0.5% formic acid (A)-0.5% formic acid-acetonitrile (B) was selected as mobile phase. The selected reaction monitoring mode was used for quantification based on the target fragment ions m/z 237.2 to m/z 135.1 for curdione and m/z 491.3 to m/z 352.1 for the glimepiride. The standard curve was linear over the range of 0.5-500 ng/mL for curdione in rat plasma and yielded a consistent peak pattern, even at the lower limit of quantitation of 0.5 ng/mL. The retention times of curdione and IS were 6.55 and 6.59 min, respectively. The mean recovery of curdione in rat plasma was 95.5-101.1%. The intra-day and inter-day precisions were between 2.35 and 9.08%. This LC-MS/MS method provides a simple and sensitive means for determining the plasma concentration.
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Affiliation(s)
- Xiang Meng
- Pharmacy School of Fudan University, 2140 Xie Tu Road, Shanghai, People's Republic of China.,Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Ting Zhang
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Ying Li
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Qi Pan
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Juan Jiang
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Yongwei Luo
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Liming Chong
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Yang Yang
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Sichong Xu
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Li Zhou
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
| | - Zuyue Sun
- Pharmacy School of Fudan University, 2140 Xie Tu Road, Shanghai, People's Republic of China.,Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, 2140 Xie Tu Road, Shanghai, 200032, People's Republic of China
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Meng X, Zhang T, Li Y, Pan Q, Jiang J, Luo Y, Chong L, Yang Y, Xu S, Zhou L, Sun Z. The toxicokinetic profile of curdione in pregnant SD rats and its transference in a placental barrier system detected by LC–MS/MS. Regul Toxicol Pharmacol 2015; 71:158-63. [DOI: 10.1016/j.yrtph.2014.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 12/07/2014] [Indexed: 11/29/2022]
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Alwis KU, Blount BC, Britt AS, Patel D, Ashley DL. Simultaneous analysis of 28 urinary VOC metabolites using ultra high performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry (UPLC-ESI/MSMS). Anal Chim Acta 2012; 750:152-60. [PMID: 23062436 PMCID: PMC11261307 DOI: 10.1016/j.aca.2012.04.009] [Citation(s) in RCA: 191] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Revised: 04/08/2012] [Accepted: 04/10/2012] [Indexed: 10/28/2022]
Abstract
Volatile organic compounds (VOCs) are ubiquitous in the environment, originating from many different natural and anthropogenic sources, including tobacco smoke. Long-term exposure to certain VOCs may increase the risk for cancer, birth defects, and neurocognitive impairment. Therefore, VOC exposure is an area of significant public health concern. Urinary VOC metabolites are useful biomarkers for assessing VOC exposure because of non-invasiveness of sampling and longer physiological half-lives of urinary metabolites compared with VOCs in blood and breath. We developed a method using reversed-phase ultra high performance liquid chromatography (UPLC) coupled with electrospray ionization tandem mass spectrometry (ESI/MSMS) to simultaneously quantify 28 urinary VOC metabolites as biomarkers of exposure. We describe a method that monitors metabolites of acrolein, acrylamide, acrylonitrile, benzene, 1-bromopropane, 1,3-butadiene, carbon-disulfide, crotonaldehyde, cyanide, N,N-dimethylformamide, ethylbenzene, ethylene oxide, propylene oxide, styrene, tetrachloroethylene, toluene, trichloroethylene, vinyl chloride and xylene. The method is accurate (mean accuracy for spiked matrix ranged from 84 to 104%), sensitive (limit of detection ranged from 0.5 to 20 ng mL(-1)) and precise (the relative standard deviations ranged from 2.5 to 11%). We applied this method to urine samples collected from 1203 non-smokers and 347 smokers and demonstrated that smokers have significantly elevated levels of tobacco-related biomarkers compared to non-smokers. We found significant (p<0.0001) correlations between serum cotinine and most of the tobacco-related biomarkers measured. These findings confirm that this method can effectively quantify urinary VOC metabolites in a population exposed to volatile organics.
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Affiliation(s)
- K Udeni Alwis
- National Center for Environmental Health, Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.
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Bertram HC, Malmendal A, Petersen BO, Madsen JC, Pedersen H, Nielsen NC, Hoppe C, Mølgaard C, Michaelsen KF, Duus JØ. Effect of magnetic field strength on NMR-based metabonomic human urine data. Comparative study of 250, 400, 500, and 800 MHz. Anal Chem 2007; 79:7110-5. [PMID: 17702531 DOI: 10.1021/ac070928a] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Metabonomic analysis of urine utilizing high-resolution NMR spectroscopy and chemometric techniques has proven valuable in characterizing the biochemical response to an intervention. To assess the effect of magnetic field strength on information contained in NMR-based metabonomic data sets, 1H NMR spectra were acquired on 250-, 400-, 500-, and 800-MHz instruments, respectively, on the same set of human urine samples collected before and after dietary interventions with milk and with meat proteins. Partial least-squares regression discriminant analyses (PLS-DA) were performed in order to elucidate the ability of the 1H spectra acquired at various field strengths to identify possible spectral differences and discriminate between pre- and postintervention samples. The loadings from PLS-DA contained the same spectral regions, implying that the same metabolites were involved in the discrimination independent of magnetic field strength. The investigation revealed a strong increase in prediction performance and thereby spectral information content when increasing the magnetic field strength from 250 to 500 MHz, while from 500 to 800 MHz the increase was less pronounced.
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Affiliation(s)
- Hanne Christine Bertram
- Faculty of Agricultural Sciences, Department of Food Science, University of Aarhus, P.O. Box 50, DK-8830 Tjele, Denmark.
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2006; 41:1654-1665. [PMID: 17136768 DOI: 10.1002/jms.959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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Kellert M, Scholz K, Wagner S, Dekant W, Völkel W. Quantitation of mercapturic acids from acrylamide and glycidamide in human urine using a column switching tool with two trap columns and electrospray tandem mass spectrometry. J Chromatogr A 2006; 1131:58-66. [PMID: 16884730 DOI: 10.1016/j.chroma.2006.07.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2006] [Revised: 07/04/2006] [Accepted: 07/07/2006] [Indexed: 11/29/2022]
Abstract
A sensitive and specific electrospray tandem mass spectrometry method using a column switching unit with two trap columns was established to quantify the mercapturates (MAs) of acrylamide (AA) and glycidamide (GA) in human urine. A specially endcapped material was applied for trapping the hydrophilic MAs and a pre-trap column was used to remove lipophilic compounds from the directly injected urine to protect the trap column. The limits of quantitation for AA-MA and GA-MA in urine were 0.5 microg/L and 1 microg/L, respectively. Urine was spiked with deuterated internal standards and injected directly into LC-MS/MS. Urine of smokers (n=13) revealed the highest concentrations of AA-MA and GA-MA in the range of 61-706 microg/L and 5-54 microg/L, respectively. Lower levels for AA-MA (14-102 microg/L) and GA-MA (1-11 microg/L) were detected in non-smokers (n=13).
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Affiliation(s)
- Marco Kellert
- Department of Toxicology, University of Würzburg, Versbacher Strasse 9, 97078 Würzburg, Germany
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Manini P, Andreoli R, Mutti A. Application of liquid chromatography–mass spectrometry to biomonitoring of exposure to industrial chemicals. Toxicol Lett 2006; 162:202-10. [PMID: 16260099 DOI: 10.1016/j.toxlet.2005.09.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent advances on biomarker research are discussed, primarily relying on experience gained with technologies based on liquid chromatography-tandem mass spectrometry (LC-MS-MS). Determination of urinary metabolites of industrial chemicals (n-hexane, benzene, toluene, and styrene) in samples from occupationally exposed workers and controls was performed by LC-MS-MS with either electrospray (ESI) or atmospheric pressure chemical ionization (APCI), as appropriate. Both phase I and II metabolites (glucuronides, sulfates, and mercapturic acids) can be detected with little or no sample manipulation, thus allowing the identification of a number of artifacts and "new" metabolites. However, experimental evidence indicates the need for properly addressing the matrix effect, which is always associated with the analysis of biological samples. Both efficient sample preparation and the use of isotopically labeled internal standards seem to be necessary to develop validated quantitative methods.
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Affiliation(s)
- Paola Manini
- ISPESL (Istituto Superiore per la Prevenzione e la Sicurezza sul Lavoro) Research Center at the University of Parma, Italy.
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