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Functional impact of cytochrome P450 3A (CYP3A) missense variants in cattle. Sci Rep 2019; 9:19672. [PMID: 31873175 PMCID: PMC6927969 DOI: 10.1038/s41598-019-56271-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/09/2019] [Indexed: 12/26/2022] Open
Abstract
Cytochrome P450 3A is the most important CYP subfamily in humans, and CYP3A4/CYP3A5 genetic variants contribute to inter-individual variability in drug metabolism. However, no information is available for bovine CYP3A (bCYP3A). Here we described bCYP3A missense single nucleotide variants (SNVs) and evaluated their functional effects. CYP3A28, CYP3A38 and CYP3A48 missense SNVs were identified in 300 bulls of Piedmontese breed through targeted sequencing. Wild-type and mutant bCYP3A cDNAs were cloned and expressed in V79 cells. CYP3A-dependent oxidative metabolism of testosterone (TST) and nifedipine (NIF) was assessed by LC-MS/MS. Finally, SNVs functional impact on TST hydroxylation was measured ex vivo in liver microsomes from individually genotyped animals. Thirteen missense SNVs were identified and validated. Five variants showed differences in CYP3A catalytic activity: three CYP3A28 SNVs reduced TST 6β-hydroxylation; one CYP3A38 variant increased TST 16β-hydroxylation, while a CYP3A48 SNV showed enhanced NIF oxidation. Individuals homozygous for rs384467435 SNV showed a reduced TST 6β-hydroxylation. Molecular modelling showed that most of SNVs were distal to CYP3A active site, suggesting indirect effects on the catalytic activity. Collectively, these findings demonstrate the importance of pharmacogenetics studies in veterinary species and suggest bCYP3A genotype variation might affect the fate of xenobiotics in food-producing species such as cattle.
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Pao LH, Hu OYP, Fan HY, Lin CC, Liu LC, Huang PW. Herb-drug interaction of 50 Chinese herbal medicines on CYP3A4 activity in vitro and in vivo. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2012; 40:57-73. [PMID: 22298448 DOI: 10.1142/s0192415x1250005x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of this study is to evaluate the effects of Chinese herbal medicines on the enzymatic activity of CYP3A4 and the possible metabolism-based herb-drug interactions in human liver microsomes and in rats. Fifty single-herbal preparations were screened for the activity of CYP3A4 using human liver microsomes for an in vitro probe reaction study. The enzymatic activity of CYP3A4 was estimated by determing the 6β-hydroxytestosterone metabolized from testosterone performed on a liquid chromatography-tandem mass spectrometry (LC-MS/MS). Huang Qin (Scutellaria baicalensis Geprgi), Mu Dan Pi (Paeonia suffruticosa Andr.), Ji Shiee Terng (Spatholobus suberectus Dunn.) and Huang Qi (Astragalus membranaceus [Fisch] Bge) have been demonstrated to have remarkable inhibiting effects on the metabolism of CYP3A4, whereas Xi Yi Hua (Magnolia biondii Pamp.) exhibited a moderate inhibition. These five single herbs were further investigated in an animal study using midazolam. Mu Dan Pi, Ji Shiee Terng and Huang Qi were observed to have greatly increased in the C(max) and AUC of midazolam. This study provides evidence of possible herb-drug interactions involved with certain single herbs.
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Affiliation(s)
- Li-Heng Pao
- School of Pharmacy, National Defense Medical Center, 161 MinchuanEast Road Section 6, Taipei, Taiwan.
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Aarabi MH, Moshtaghie AA, Mirhashemi M. Comparative in vitro study of the intestinal absorption of titanium and iron in rats. Pak J Biol Sci 2011; 14:945-949. [PMID: 22514896 DOI: 10.3923/pjbs.2011.945.949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Rat Everted Gut Sac (EGS) model was employed to study the intestinal uptake of titanium and iron. Incubation of freshly prepared rat EGS in Earle's medium pH = 7.4 containing titanium showed that the absorption of titanium as well as iron was a dose dependent process. Ascorbic acid enhanced the absorption of both metal ions, while NaF (1 mM) as an inhibitor of glycolytic energy supply, decreased their absorption. The Na+-K+ ATPase inhibitor, ouabain (1 mM) reduced intestinal absorption of Titanium. This suggests that titanium uptake is an active transport process as is iron uptake. Iron absorption was reduced approximate by 17% when titanium was presented to incubation medium EGS whereas, the absorption of titanium was decreased by 35% when iron was added to the reaction mixture.
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Affiliation(s)
- Mohammad Hossein Aarabi
- Department of Biochemistry, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
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4
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Determination of free and deconjugated testosterone and epitestosterone in urine using SPME and LC–MS/MS. Bioanalysis 2011; 3:23-30. [DOI: 10.4155/bio.10.177] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: A thin sheet of polydimethylsilosane membrane was used as an extraction phase for solid-phase microextraction. Compared with fiber or rod solid-phase microextraction geometries, the thin film exhibited much higher extraction capacity without sacrificing extraction time due to its higher area-to-volume ratio. The analytical method involved direct extraction of unconjugated testosterone (T) and epitestosterone (ET) followed by separation on a C18 column and detection by selected reaction monitoring in positive ionization mode. Results: The limit of detection was 1 ng/l for both T and ET. After method validation, free (unconjugated) T and ET were extracted and quantified in real samples. Since T and ET are extensively metabolized, the proposed method was also applied to extract the steroids after enzymatic deconjugation of urinary-excreted steroid glucuronides. Conclusion: The proposed method allows quantification of both conjugated and unconjugated steroids, and revealed that there was a change in the ratio of T to ET after enzymatic deconjugation, indicating different rates of metabolism.
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Bonnefille P, Sezgin-Bayindir Z, Belkhelfa H, Arellano C, Gandia P, Woodley J, Houin G. The use of isolated enterocytes to study Phase I intestinal drug metabolism: validation with rat and pig intestine. Fundam Clin Pharmacol 2010; 25:104-14. [DOI: 10.1111/j.1472-8206.2010.00904.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Tocchetti A, Ekalle Soppo CB, Zani F, Bianchi F, Gagliani MC, Pozzi B, Rozman J, Elvert R, Ehrhardt N, Rathkolb B, Moerth C, Horsch M, Fuchs H, Gailus-Durner V, Beckers J, Klingenspor M, Wolf E, de Angelis MH, Scanziani E, Tacchetti C, Scita G, Di Fiore PP, Offenhäuser N. Loss of the actin remodeler Eps8 causes intestinal defects and improved metabolic status in mice. PLoS One 2010; 5:e9468. [PMID: 20209148 PMCID: PMC2830459 DOI: 10.1371/journal.pone.0009468] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Accepted: 02/05/2010] [Indexed: 01/06/2023] Open
Abstract
Background In a variety of organisms, including mammals, caloric restriction improves metabolic status and lowers the incidence of chronic-degenerative diseases, ultimately leading to increased lifespan. Methodology/Principal Findings Here we show that knockout mice for Eps8, a regulator of actin dynamics, display reduced body weight, partial resistance to age- or diet-induced obesity, and overall improved metabolic status. Alteration in the liver gene expression profile, in behavior and metabolism point to a calorie restriction-like phenotype in Eps8 knockout mice. Additionally, and consistent with a calorie restricted metabolism, Eps8 knockout mice show increased lifespan. The metabolic alterations in Eps8 knockout mice correlated with a significant reduction in intestinal fat absorption presumably caused by a 25% reduction in intestinal microvilli length. Conclusions/Significance Our findings implicate actin dynamics as a novel variable in the determination of longevity. Additionally, our observations suggest that subtle differences in energy balance can, over time, significantly affect bodyweight and metabolic status in mice.
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Affiliation(s)
| | | | - Fabio Zani
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
| | - Fabrizio Bianchi
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
- Dipartimento di Medicina, Chirurgia ed Odontoiatria, Universita' degli Studi di Milano, Milan, Italy
| | - Maria Cristina Gagliani
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
| | - Benedetta Pozzi
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
| | - Jan Rozman
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
- Molecular Nutritional Medicine, Technische Universität München, Freising-Weihenstephan, Germany
| | - Ralf Elvert
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
| | - Nicole Ehrhardt
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
| | - Birgit Rathkolb
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
- Institute of Molecular Animal Breeding and Biotechnology, Ludwig Maximilians Universität München, Munich, Germany
| | - Corinna Moerth
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
- Institute of Molecular Animal Breeding and Biotechnology, Ludwig Maximilians Universität München, Munich, Germany
| | - Marion Horsch
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
| | - Helmut Fuchs
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
| | | | - Johannes Beckers
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
- Lehrstuhl für Experimentelle Genetik, Technische Universität München, Freising-Weihenstephan, Germany
| | - Martin Klingenspor
- Molecular Nutritional Medicine, Technische Universität München, Freising-Weihenstephan, Germany
| | - Eckhard Wolf
- Institute of Molecular Animal Breeding and Biotechnology, Ludwig Maximilians Universität München, Munich, Germany
| | - Martin Hrabé de Angelis
- German Mouse Clinic, Helmholtz Zentrum München, Munich/Neuherberg, Germany
- Lehrstuhl für Experimentelle Genetik, Technische Universität München, Freising-Weihenstephan, Germany
| | - Eugenio Scanziani
- Facoltà di Medicina Veterinaria, Università degli Studi di Milano, Milan, Italy
| | - Carlo Tacchetti
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
| | - Giorgio Scita
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
- Dipartimento di Medicina, Chirurgia ed Odontoiatria, Universita' degli Studi di Milano, Milan, Italy
| | - Pier Paolo Di Fiore
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
- Dipartimento di Medicina, Chirurgia ed Odontoiatria, Universita' degli Studi di Milano, Milan, Italy
- Istituto Europeo di Oncologia, Milan, Italy
- * E-mail: (PPDF); (NO)
| | - Nina Offenhäuser
- Fondazione Instituto FIRC di Oncologia Molecolare, Milan, Italy
- * E-mail: (PPDF); (NO)
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Quantification of topotecan by liquid chromatography–mass spectrometry (LC–MS). Application to intestinal transport using rat everted gut sacs. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:645-52. [DOI: 10.1016/j.jchromb.2010.01.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 01/18/2010] [Indexed: 11/19/2022]
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Shayeganpour A, Hamdy DA, Brocks DR. Effects of intestinal constituents and lipids on intestinal formation and pharmacokinetics of desethylamiodarone formed from amiodarone. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.60.12.0008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Abstract
To model the impact of intestinal components associated with a high fat meal on metabolism of amiodarone, rat everted intestinal sacs were evaluated for their ability to metabolize the drug to its active metabolite (desethylamiodarone) under a variety of conditions. The preparations were obtained from fasted rats or rats pretreated with 1% cholesterol in peanut oil. After isolation of the tissues, the intestinal segments were immersed in oxygenated Krebs Henseleit buffer containing varying concentrations of bile salts, cholesterol, lecithin and lipase with or without soybean oil emulsion as a source of triglycerides. Amiodarone uptake was similar between the five 10-cm segments isolated distally from the stomach. Desethylamiodarone was measurable in all segments. Based on the metabolite-to-drug concentration ratio within the tissues, there was little difference in metabolic efficiency between segments for any of the treatments. Between treatments, however, it appeared that the lowest level of metabolism was noted in rats pretreated with 1% cholesterol in peanut oil. This reduction in metabolic efficiency was not observed in gut sacs from the fasted rats to which soybean oil emulsion was directly added to the incubation media. Despite the apparent reduction in intestinal metabolism, there was no apparent change in the ratio of metabolite-to-drug area under the plasma concentration versus time ratios of fasted rats and those given 1% cholesterol in peanut oil, suggesting that the intestinal presystemic formation of desethylamiodarone is not substantial.
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Affiliation(s)
| | - Dalia A Hamdy
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Alberta, Canada
| | - Dion R Brocks
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Alberta, Canada
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Samanidou VF, Karageorgou EG, Papadoyannis IN. Simultaneous Determination of Testosterone and its Major Metabolite Epitestosterone in Biological Fluids by HPLC. J LIQ CHROMATOGR R T 2007. [DOI: 10.1080/10826070701274916] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - E. G. Karageorgou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
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Elkayam T, Amitay-Shaprut S, Dvir-Ginzberg M, Harel T, Cohen S. Enhancing the drug metabolism activities of C3A--a human hepatocyte cell line--by tissue engineering within alginate scaffolds. ACTA ACUST UNITED AC 2006; 12:1357-68. [PMID: 16771648 DOI: 10.1089/ten.2006.12.1357] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this study, we investigated the applicability of C3A--a human hepatocyte cell line--as a predicting tool for drug metabolism by applying tissue-engineering methods. Cultivation of C3A cells within alginate scaffolds induced the formation of spheroids with enhanced drug metabolism activities compared to that of two-dimensional (2-D) monolayer cultures. The spheroid formation process was demonstrated via histology, immunohistochemistry, and transmission electron microscope (TEM) analyses. The C3A spheroids displayed multilayer cell morphology, characterized by a large number of tight junctions, polar cells, and bile canaliculi, similar to spheroids of primary hepatocytes. Spheroid formation was accompanied by a reduction in P-glycoprotein (Pgp) gene expression and C3A cell proliferation was limited mainly to cells on the spheroid outskirt. The 3-D constructs maintained a nearly constant cell number according to MTT assay. Drug metabolism by the two most important cytochrome p-450 (CYP) enzymes in human liver, CYP1A2 and CYP3A4, was tested using preferred drugs. With CYP1A2, 3-fold enhancement in activity per cell was seen for converting ethoxyresorufin to resorufin compared to C3A cell monolayers. The spheroids responded to the inducer beta-naphthoflavone and to the inhibitor furafylline of CYP1A2. Enhanced metabolizing activity of CYP3A4, measured by the amount 6beta-testosterone formed from testosterone, and that of the phase II enzyme glucuronosyltransferases (UGT) further indicated that the tissue-engineered C3A spheroids may provide an efficient experimental tool for predicting drug activities by these CYPs. Moreover, the maintenance of constant cell number, as well as the elevated hepatocellular functions and drug metabolism activities, suggest that the tissue-engineered C3A may be applicable in replacement therapies.
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Affiliation(s)
- Tsiona Elkayam
- Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Arellano C, Philibert C, Vachoux C, Woodley J, Houin G. Validation of a liquid chromatography–mass spectrometry method to assess the metabolism of bupropion in rat everted gut sacs. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 829:50-5. [PMID: 16246642 DOI: 10.1016/j.jchromb.2005.09.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 09/15/2005] [Accepted: 09/22/2005] [Indexed: 01/10/2023]
Abstract
We have developed a rapid, sensitive and selective LC-MS method for the simultaneous assay of bupropion and its metabolite hydroxybupropion during its intestinal absorption, studied with the rat everted gut sac model. The method was validated in the concentration range of 1-15 microM (0.024-3.58 microg/mL) for bupropion and 0.005-1 microM (0.00127-0.25 microg/mL) for hydroxybupropion with 10 microL injected. Bupropion is used as a probe for the activity of the CYP2B6 isoenzyme of the P450 family of enzymes in man. Its major metabolite hydroxybupropion was found in the serosal media of the gut sac showing that the isoenzyme of the 2B group was active in the intestinal mucosa and metabolized bupropion during its passage across the mucosa. The metabolite was also quantified in the mucosal media indicating its ability to cross the apical membrane of the epithelial cells.
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Affiliation(s)
- C Arellano
- Laboratoire de Cinétique des Xénobiotiques, UMR 181, Université Paul Sabatier, 35 chemin de Maraichers, Toulouse III, 31062 Toulouse Cedex 09, France.
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12
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Arellano C, Philibert C, Dane à Yakan EN, Vachoux C, Lacombe O, Woodley J, Houin G. Validation of a liquid chromatography–mass spectrometry method to assess the metabolism of dextromethorphan in rat everted gut sacs. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 819:105-13. [PMID: 15797528 DOI: 10.1016/j.jchromb.2005.01.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2004] [Accepted: 01/31/2005] [Indexed: 11/16/2022]
Abstract
A rapid, sensitive and selective liquid chromatography-mass spectrometry (LC-MS) method was developed for the simultaneous assay of dextromethorphan and its metabolites in tissue culture medium and its intestinal metabolism studied with the rat everted gut sac model. The method was validated in the concentration range of 0.1-2.5 microM (27.1 ng/mL-0.677 microg/mL) for dextromethorphan and 0.005-0.5 microM for dextrorphan and 3-methoxymorphinan (1.28 ng/mL-0.128 microg/mL) and 3-hydroxymorphinan (1.22 ng/mL-0.122 microg/mL). The limits of quantification (LOQ) were 0.0025 microM (12.5 fmoles, 3.4 pg, 5 microL injected) for dextromethorphan; 0.0025 microM for dextrorphan, 3-methoxymorphinan (24.9 fmoles, 6.4 pg injected), and 3-hydroxymorphinan (25.1 fmoles, 6.1 pg injected) with 10 microL injected. The detection of dextrorphan and 3-methoxymorphinan showed that both the P450 isoforms CYP3A and 2D were active in the intestinal mucosa and metabolised dextromethorphan during its passage across the mucosa.
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Affiliation(s)
- C Arellano
- Laboratoire de Cinétique des Xénobiotiques, UMR 181, Physiopathologie et Toxicologie Experimentale (UPTE INRA-ENVT), Faculté des Sciences Pharmaceutiques, 35 Chemin des Maraîchers, 31062 Toulouse, France.
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2004; 39:1383-1394. [PMID: 15532071 PMCID: PMC7166839 DOI: 10.1002/jms.712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of mass spectrometry. Each bibliography is divided into 11 sections: 1 Books, Reviews & Symposia; 2 Instrumental Techniques & Methods; 3 Gas Phase Ion Chemistry; 4 Biology/Biochemistry: Amino Acids, Peptides & Proteins; Carbohydrates; Lipids; Nucleic Acids; 5 Pharmacology/Toxicology; 6 Natural Products; 7 Analysis of Organic Compounds; 8 Analysis of Inorganics/Organometallics; 9 Surface Analysis; 10 Environmental Analysis; 11 Elemental Analysis. Within each section, articles are listed in alphabetical order with respect to author (5 Weeks journals ‐ Search completed at 8th. Sept. 2004)
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