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González-Jartín JM, Aguín O, Rodríguez-Cañás I, Alvariño R, Sainz MJ, Vieytes MR, Rial C, Piñón P, Salinero C, Alfonso A, Botana LM. First description of adenosine production by Gnomoniopsis smithogilvyi, causal agent of chestnut brown rot. World J Microbiol Biotechnol 2024; 40:148. [PMID: 38539025 PMCID: PMC10972910 DOI: 10.1007/s11274-024-03958-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 03/14/2024] [Indexed: 04/28/2024]
Abstract
Gnomoniopsis smithogilvyi (Gnomoniaceae, Diaporthales) is the main causal agent of chestnut brown rot on sweet chestnut worldwide. The rotting of nuts leads to alterations in the organoleptic qualities and decreased fruit production, resulting in significant economic losses. In 2021, there was an important outbreak of chestnut rot in southern Galicia (Spanish northwest). The profile of secondary metabolites from G. smithogilvyi was studied, especially to determine its capability for producing mycotoxins, as happens with other rotting fungi, due to the possible consequences on the safety of chestnut consumption. Secondary metabolites produced by isolates of G. smithogilvyi growing in potato dextrose agar (PDA) medium were identified using liquid chromatography coupled with high-resolution mass spectrometry. Three metabolites with interesting pharmacological and phyto-toxicological properties were identified based on their exact mass and fragmentation patterns, namely adenosine, oxasetin, and phytosphingosine. The capacity of G. smithogilvyi to produce adenosine in PDA cultures was assessed, finding concentrations ranging from 176 to 834 µg/kg. Similarly, the production of mycotoxins was ruled out, indicating that the consumption of chestnuts with necrotic lesions does not pose a health risk to the consumer in terms of mycotoxins.
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Affiliation(s)
- Jesús M González-Jartín
- Departamento de Farmacología, Facultad de Farmacia, IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Olga Aguín
- Estación Fitopatolóxica Areeiro, Deputación de Pontevedra, 36153, Pontevedra, Spain
| | - Inés Rodríguez-Cañás
- Departamento de Farmacología, Facultad de Veterinaria, IDIS, Universidade de Santiago de Compostela, 27002, Lugo, Spain
| | - Rebeca Alvariño
- Departamento de Fisiología, Facultad de Veterinaria, IDIS, Universidade de Santiago de Compostela, 27002, Lugo, Spain
| | - María J Sainz
- Departamento de Producción Vegetal y Proyectos de Ingeniería, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002, Lugo, Spain.
| | - Mercedes R Vieytes
- Departamento de Fisiología, Facultad de Veterinaria, IDIS, Universidade de Santiago de Compostela, 27002, Lugo, Spain
| | - Cristina Rial
- Estación Fitopatolóxica Areeiro, Deputación de Pontevedra, 36153, Pontevedra, Spain
| | - Pilar Piñón
- Estación Fitopatolóxica Areeiro, Deputación de Pontevedra, 36153, Pontevedra, Spain
| | - Carmen Salinero
- Estación Fitopatolóxica Areeiro, Deputación de Pontevedra, 36153, Pontevedra, Spain
| | - Amparo Alfonso
- Departamento de Farmacología, Facultad de Veterinaria, IDIS, Universidade de Santiago de Compostela, 27002, Lugo, Spain.
| | - Luis M Botana
- Departamento de Farmacología, Facultad de Veterinaria, IDIS, Universidade de Santiago de Compostela, 27002, Lugo, Spain
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Wang R, Tao M, Zhu Y, Fan D, Wang M, Zhao Y. Puerarin inhibited 3-chloropropane-1,2-diol fatty acid esters formation by reacting with glycidol and glycidyl esters. Food Chem 2021; 358:129843. [PMID: 33915425 DOI: 10.1016/j.foodchem.2021.129843] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 11/30/2022]
Abstract
The inhibitory effects of seven polyphenols on 3-chloropropane-1,2-diol fatty acid esters (3-MCPDE) formation were investigated in palm oil models. Results showed that there was not a positive significant correlation between the free-radical scavenging activities of the tested compounds and their 3-MCPDE-formation inhibitory activities; puerarin, with weak antioxidant activity, showed the highest inhibitory capacity. Moreover, puerarin reduced the content of glycidol and glycidyl esters (GEs), two key intermediates of 3-MCPDE formation in the oil models; and a puerarin-adduct was discovered in the oil fortified with glycidol or GEs, with its structure elucidated by LC-MS/MS and comparison with newly synthesized ones. Based on its chemical structure, we proposed that puerarin, at least in part, reacted with glycidol and GEs to inhibit 3-MCPDE formation. In addition, the formed compound, puerarin-7-O-propanediol was identified in the potato chips frying system, further confirming reacting with glycidol/GEs as a key mechanism of puerarin to inhibit 3-MCPDE formation.
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Affiliation(s)
- Ru Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
| | - Mengru Tao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
| | - Yamin Zhu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
| | - Daming Fan
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Mingfu Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China; School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
| | - Yueliang Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China.
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3
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Demarque DP, Crotti AEM, Vessecchi R, Lopes JLC, Lopes NP. Fragmentation reactions using electrospray ionization mass spectrometry: an important tool for the structural elucidation and characterization of synthetic and natural products. Nat Prod Rep 2015; 33:432-55. [PMID: 26673733 DOI: 10.1039/c5np00073d] [Citation(s) in RCA: 276] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Over the last decade, the number of studies reporting the use of electrospray ionization mass spectrometry (ESI-MS) in combination with collision cells (or other activation methods) to promote fragmentation of synthetic and natural products for structural elucidation purposes has considerably increased. However, the lack of a systematic compilation of the gas-phase fragmentation reactions subjected to ESI-MS/MS conditions still represents a challenge and has led to many misunderstood results in the literature. This review article exploits the most common fragmentation reactions for ions generated by ESI in positive and negative modes using collision cells in an effort to stimulate the use of this technique by non-specialists, undergraduate students and researchers in related areas.
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Affiliation(s)
- Daniel P Demarque
- Departamento de Física e Quimica, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café, s/n, Ribeirão Preto, SP, Brazil.
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Wong KH, Razmovski-Naumovski V, Li KM, Li GQ, Chan K. Comparing morphological, chemical and anti-diabetic characteristics of Puerariae Lobatae Radix and Puerariae Thomsonii Radix. JOURNAL OF ETHNOPHARMACOLOGY 2015; 164:53-63. [PMID: 25560667 DOI: 10.1016/j.jep.2014.12.050] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 12/22/2014] [Accepted: 12/23/2014] [Indexed: 05/21/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Puerariae Lobatae Radix (PLR) and Puerariae Thomsonii Radix (PTR) are traditional Chinese medicines used for the treatment of diabetes and cardiovascular diseases. These two herbs are used interchangeably in clinical practice, even though they possess significantly different chemical profiles. In the case of Pueraria species, the misidentification is related to the multiple Chinese common names in clinical practice and variable pharmaceutical Latin names in different versions of the Pharmacopoeia of the People's Republic of China. In addition, there is lack of evidence demonstrating how the differences in the chemical profile would impact on the pharmacological activity of the two herbs. Therefore, the aim of this study was to compare the microscopic, phytochemical profiles and anti-diabetic activity of PLR and PTR so that the two species can be differentiated. MATERIALS AND METHODS The microscopic characteristics of the PLR and PTR were observed and measured by an optical microscope. The major compounds were quantified by ultra-performance liquid chromatography (UPLC) and total flavonoid content (TFC) colorimetric assay. The free radical scavenging capacity was assessed by 2,2-diphenyl-2-picrylhydrazyl (DPPH) antioxidant assays. Anti-diabetic activity was determined by the inhibition of porcine pancreatic α-amylase and rat intestinal α-glucosidase activities. RESULTS Microscopic results illustrated that the size of xylem vessels (PLR: 0.1390 ± 0.0184 mm; PTR: 0.0471 ± 0.0109 mm), number of fibre per bundle (PLR: 32.6800 ± 2.8780; PTR: 16.5900 ± 0.9982) and the size of fibre (PLR: 0.0075 ± 0.0003 mm(2); PTR: 0.0025 ± 0.0002 mm(2)) in PLR were significantly greater than that in PTR (p<0.01). PLR possessed a significantly lower total starch content (PLR: 0.5288 ± 1.2559 mg starch/g DM; PTR: 76.7954 ± 2.9905 mg starch/g DM) and total dietary fibre content (PLR: 4.2886 ± 0.3466 g/100g DM; PTR: 12.4148 ± 0.4541 g/100g DM) as compared to PTR. Isoflavonoids including puerarin, daidzin, genistin and daidzein were the major chemical constituents in both species. However, the average content of puerarin in PLR was found to be eleven times greater than that in PTR. Furthermore, the TFC, DPPH free radical scavenging capacity, anti-α-amylase and anti-α-glucosidase in the PLR extracts were 4.42, 4.91, 3.10 and 4.22 times greater than in the PTR extracts. CONCLUSIONS This study provides a comprehensive investigation on the two medicinal valuable Pueraria species and allows differences to be ascertained. This information can be used to update monographs which will help practitioners and dispensers differentiate the herbs. Further study on the interchangeable use of PLR and PTR in clinical practice is urgently warranted.
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Affiliation(s)
- Ka H Wong
- Faculty of Pharmacy, The University of Sydney, NSW 2006, Australia
| | - Valentina Razmovski-Naumovski
- Faculty of Pharmacy, The University of Sydney, NSW 2006, Australia; National Institute of Complementary Medicine, University of Western Sydney, NSW 2560, Australia
| | - Kong M Li
- Discipline of Pharmacology, Bosch Institute, The University of Sydney, NSW 2006, Australia
| | - George Q Li
- Faculty of Pharmacy, The University of Sydney, NSW 2006, Australia
| | - Kelvin Chan
- Faculty of Pharmacy, The University of Sydney, NSW 2006, Australia; National Institute of Complementary Medicine, University of Western Sydney, NSW 2560, Australia.
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Zhang Z, Guo K, Bai Y, Dong J, Gao Z, Yuan Y, Wang Y, Liu L, Yue T. Identification, synthesis, and safety assessment of forchlorfenuron (1-(2-chloro-4-pyridyl)-3-phenylurea) and its metabolites in kiwifruits. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:3059-3066. [PMID: 25757044 DOI: 10.1021/acs.jafc.5b01100] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Identification and evaluation of safety of forchlorfenuron ((1-(2-chloro-4-pyridyl)-3-phenylurea)), 1, metabolites after biotransformation in kiwifruit is the objective of this study. To elucidate properties of these metabolites, liquid chromatography hybrid ion trap time-of-flight mass spectrometry (LC-IT-TOF-MS) was applied, with MetID Solution and Formula Predictor Software in positive mode. Cytotoxicity of forchlorfenuron and its metabolites were tested through sulforhodamine B assays against normal Chinese hamster ovary cells (CHO). As deduced from characteristic fragment ions of forchlorfenuron, then confirmed by comparison with synthetic standards, as well as characterized by NMR and mass spectrometry techniques, results indicate the presence of 4-hydroxyphenyl-forchlorfenuron, 2, 3-hydroxyphenyl-forchlorfenuron, 3, and forchlorfenuron-4-O-β-D-glucoside, 5. Forchlorfenuron (IC50 = 12.12 ± 2.14 μM) and 4-hydroxyphenyl-forchlorfenuron (IC50 = 36.15 ± 1.59 μM), exhibits significant cytotoxicity against CHO, while 3-hydroxyphenyl-forchlorfenuron and forchlorfenuron-4-O-β-D-glucoside show no cytotoxicity.
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Affiliation(s)
- Zhiwei Zhang
- ‡College of Food Science and Engineering, Qingdao Agricultural University, Chengyang 266109, Qingdao China
| | | | | | - Jing Dong
- ⊥Beijing Office, Shimadzu International Trading (Shanghai), 14/F Life Tower, 16 Chaoyang Men Wai Street, Beijing 100020, China
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UPLC–ESI-Q-TOF-MSE identification of urinary metabolites of the emerging sport nutrition supplement methoxyisoflavone in human subjects. J Pharm Biomed Anal 2014; 96:127-34. [DOI: 10.1016/j.jpba.2014.03.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Revised: 02/18/2014] [Accepted: 03/21/2014] [Indexed: 11/17/2022]
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Lecompte Y, Richeval C, Humbert L, Perrin M, Arpino P. Étude du métabolisme de xénobiotiques inconnus par spectrométrie de masse hybride « quadripôle-temps de vol » : à propos de la méthoxyisoflavone. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2014. [DOI: 10.1016/j.toxac.2014.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Niu Y, Li H, Dong J, Wang H, Hashi Y, Chen S. Identification of isoflavonoids in Radix Puerariae for quality control using on-line high performance liquid chromatography-diode array detector-electrospray ionization-mass spectrometry coupled with post-column derivatization. Food Res Int 2012. [DOI: 10.1016/j.foodres.2012.05.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Kang M, Yang Y, Zhang P, Dong J. Identification and Analysis of Impurities in Erythrosine by High-Performance Liquid Chromatography with Quadrupole Ion Trap Time-of-Flight Mass Spectrometry. FOOD ANAL METHOD 2012. [DOI: 10.1007/s12161-012-9512-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Mbeunkui F, Grace MH, Yousef GG, Ann Lila M. Isolation and characterization of flavonols from blackcurrant by high-performance counter-current chromatography and electrospray ionization tandem mass spectrometry. J Sep Sci 2012; 35:1682-9. [DOI: 10.1002/jssc.201200198] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Mary Ann Lila
- Plants for Human Health Institute; North Carolina State University; North Carolina Research Campus; Kannapolis NC USA
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11
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Chen XF, Wu HT, Tan GG, Zhu ZY, Chai YF. Liquid chromatography coupled with time-of-flight and ion trap mass spectrometry for qualitative analysis of herbal medicines. J Pharm Anal 2011; 1:235-245. [PMID: 29403704 PMCID: PMC5760787 DOI: 10.1016/j.jpha.2011.09.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 09/07/2011] [Indexed: 12/14/2022] Open
Abstract
With the expansion of herbal medicine (HM) market, the issue on how to apply up-to-date analytical tools on qualitative analysis of HMs to assure their quality, safety and efficacy has been arousing great attention. Due to its inherent characteristics of accurate mass measurements and multiple stages analysis, the integrated strategy of liquid chromatography (LC) coupled with time-of-flight mass spectrometry (TOF-MS) and ion trap mass spectrometry (IT-MS) is well-suited to be performed as qualitative analysis tool in this field. The purpose of this review is to provide an overview on the potential of this integrated strategy, including the review of general features of LC-IT-MS and LC-TOF-MS, the advantages of their combination, the common procedures for structure elucidation, the potential of LC-hybrid-IT-TOF/MS and also the summary and discussion of the applications of the integrated strategy for HM qualitative analysis (2006-2011). The advantages and future developments of LC coupled with IT and TOF-MS are highlighted.
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Affiliation(s)
- Xiao-Fei Chen
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.,Shanghai Key Laboratory for Pharmaceutical Metabolite Research, Shanghai 200433, China
| | - Hai-Tang Wu
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.,Shanghai Key Laboratory for Pharmaceutical Metabolite Research, Shanghai 200433, China
| | - Guang-Guo Tan
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.,Shanghai Key Laboratory for Pharmaceutical Metabolite Research, Shanghai 200433, China
| | - Zhen-Yu Zhu
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.,Shanghai Key Laboratory for Pharmaceutical Metabolite Research, Shanghai 200433, China
| | - Yi-Feng Chai
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.,Shanghai Key Laboratory for Pharmaceutical Metabolite Research, Shanghai 200433, China
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Mbeunkui F, Grace MH, Lategan C, Smith PJ, Raskin I, Lila MA. Isolation and identification of antiplasmodial N-alkylamides from Spilanthes acmella flowers using centrifugal partition chromatography and ESI-IT-TOF-MS. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:1886-92. [DOI: 10.1016/j.jchromb.2011.05.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 05/04/2011] [Accepted: 05/08/2011] [Indexed: 11/29/2022]
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13
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Metabolites of puerarin identified by liquid chromatography tandem mass spectrometry: Similar metabolic profiles in liver and intestine of rats. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:363-70. [DOI: 10.1016/j.jchromb.2009.12.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2009] [Revised: 11/27/2009] [Accepted: 12/01/2009] [Indexed: 11/20/2022]
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14
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Barnes JS, Nguyen HP, Shen S, Schug KA. General method for extraction of blueberry anthocyanins and identification using high performance liquid chromatography-electrospray ionization-ion trap-time of flight-mass spectrometry. J Chromatogr A 2009; 1216:4728-35. [PMID: 19414178 DOI: 10.1016/j.chroma.2009.04.032] [Citation(s) in RCA: 143] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Revised: 04/04/2009] [Accepted: 04/09/2009] [Indexed: 10/20/2022]
Abstract
A systematic approach for optimizing the extraction and identification of anthocyanins from blueberries was explored using HPLC-UV and HPLC-ESI-IT-TOF-MS. Sample homogenization effects, extraction solvent selection, type of acid, and amount used in extraction solvent were investigated. A mixture of methanol:water:trifluoroacetic acid (70:30:1, v/v/v) was found to be the best solvent system for blueberry anthocyanin extraction. Differences in total anthocyanin content due to commercial blueberry processing were explored as an application using the optimized extraction technique and HPLC-UV analysis. A methodical system for anthocyanin identification by HPLC-ESI-IT-TOF-MS without the use of standards was also reviewed and applied. Consideration was given to elution order by chromatographic separation with selective detection at 520nm, high mass accuracy m/z values, tandem MS fragmentation, and previously published literature. Overall, 25 anthocyanins from a wild type highbush blueberry were identified and reported.
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Affiliation(s)
- Jeremy S Barnes
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, USA
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15
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Phelps MA, Rozewski DM, Johnston JS, Farley KL, Albanese KA, Byrd JC, Lin TS, Grever MR, Dalton JT. Development and validation of a sensitive liquid chromatography/mass spectrometry method for quantitation of flavopiridol in plasma enables accurate estimation of pharmacokinetic parameters with a clinically active dosing schedule. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 868:110-5. [PMID: 18490204 DOI: 10.1016/j.jchromb.2008.04.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 04/14/2008] [Accepted: 04/16/2008] [Indexed: 11/26/2022]
Abstract
A high-performance liquid chromatographic assay with tandem mass spectrometric detection was developed and validated for quantitation of the broad spectrum kinase inhibitor, flavopiridol, in human plasma. Sample preparation conditions included liquid-liquid extraction in acetonitrile (ACN), drying, and reconstitution in 20/80 water/ACN. Flavopiridol and the internal standard (IS), genistein, were separated by reversed phase chromatography using a C-18 column and a gradient of water with 25 mM ammonium formate and ACN. Electrospray ionization and detection of flavopiridol and genistein were accomplished with single reaction monitoring of m/z 402.09>341.02 and 271.09>152.90, respectively in positive-ion mode [M+H](+) on a triple quadrupole mass spectrometer. Recovery was greater than 90% throughout the linear range of 3-1000 nM. Replicate sample analysis indicated within- and between-run accuracy and precision to be less than 13% throughout the linear range. This method has the lowest lower limit of quantitation (LLOQ) reported to date for flavopiridol, and it allows for more accurate determination of terminal phase concentrations and improved pharmacokinetic parameter estimation in patients receiving an active dosing schedule of flavopiridol.
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Affiliation(s)
- Mitch A Phelps
- Comprehensive Cancer Center, College of Pharmacy, The Ohio State University, Columbus, OH, USA
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