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Hao JH, Xiao PT, Duan PB, Miao DY, Jiang XY, Kuang YJ, Liu EH. Authentication of Platycladus Orientalis Leaves and Its Five Adulterants by Combination of Morphology and Microscopic Characteristics, TLC, and HPLC Analysis. J AOAC Int 2023; 106:1295-1304. [PMID: 37243686 DOI: 10.1093/jaoacint/qsad066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 04/27/2023] [Accepted: 05/18/2023] [Indexed: 05/29/2023]
Abstract
BACKGROUND Platycladus orientalis leaves (POL), as the source of the traditional Chinese medicine (TCM) Platycladi Cacumen, has frequently been found to be misused with five adulterants including Chamaecyparis obtusa leaves (COL), Cupressus funebris leaves (CFL), Juniperus virginiana leaves (JVL), Sabina chinensis leaves (SCL), and Juniperus formosana leaves (JFL). OBJECTIVE The purpose of this study was to distinguish POL (fresh leaves) from its five adulterants (fresh leaves). METHODS The micromorphological features in terms of transection and microscopic characteristics of POL and adulterants were captured and compared using the an microscope. Both HPLC and TLC methods for the simultaneous determination of six bioactive flavonoids (myricitrin, isoquercitrin, quercitrin, amentoflavone, afzelin, and hinokiflavone) have been developed. RESULTS There were significant differences in microscopic features of transverse section and powders. The TLC results suggested that the spots of myricitrin in POL were more obvious than those in the five adulterants. The contents of myricitrin and quercitrin, or the total content of flavonoids in POL, determined by HPLC, were significantly higher than those in the adulterants. CONCLUSION POL was successfully distinguished from its five adulterants by the comparison of morphology, microscopic characteristics, and chemical profiles. HIGHLIGHTS This research provides a comprehensive morphology, microscopic identification, TLC, and HPLC analysis for authenticating POL and its five adulterants.
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Affiliation(s)
- Jin-Hua Hao
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
| | - Ping-Ting Xiao
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
| | - Peng-Bo Duan
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
| | - Dan-Yang Miao
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
| | - Xiao-Yu Jiang
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
| | - Yu-Jia Kuang
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
| | - E-Hu Liu
- China Pharmaceutical University, State Key Laboratory of Natural Medicines, No. 24 Tongjia Lane, Nanjing, PR China
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Abdulhafiz F, Reduan MFH, Hisam AH, Mohammad I, Abdul Wahab IR, Abdul Hamid FF, Mohammed A, Nordin ML, Shaari R, Bakar LA, Kari ZA, Wei LS, Goh KW, Ahmad Mohd Zain MR. LC-TOF-MS/MS and GC-MS based phytochemical profiling and evaluation of wound healing activity of Oroxylum Indicum (L.) Kurz (Beka). Front Pharmacol 2022; 13:1050453. [PMID: 36483735 PMCID: PMC9723245 DOI: 10.3389/fphar.2022.1050453] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/08/2022] [Indexed: 09/29/2023] Open
Abstract
Background: Beka (Oroxylum indicum (L.) Kurz) has been used as a culinary herb and natural remedy by the local communities in Malaysia. The leaf of O. indicum is traditionally used for the treatment of diarrhea, high blood pressure, and improving digestive health. Objectives: The present study was conducted to evaluate the phytochemical constituents and wound healing properties (in vitro and in vivo models) of aqueous and ethanol extracts of O. indicum leaves. Methods: The total phenolic (TPC) and total flavonoid (TFC) contents in the plant extracts were determined by the spectrophotometric methods. Further, the extract was characterized by Liquid Chromatography Time-of-Flight Mass Spectrometry (LC-TOF-MS/MS) and Gas Chromatography-Mass Spectrometry (GC-MS). The wound healing activity was assessed using the in vitro scratch wound-healing assay and in vivo excisional wound model. Results: The results show the ethanol leaves extract had the higher TPC (164 mg GAE/g) when compared with the aqueous leaves extract (30 mg gallic acid equivalents/g). The ethanol leaves extract was also found to have higher TFC (101 mg Catechin equivalents/g) than the aqueous leaves extract (76 mg Catechin equivalents/g). The ethanol leaves extract was then used for further chemical analysis. The LC-TOF-MS/MS analysis showed that the leaves extracts of O. indicum contains many important compounds such as Orientin, Chrysin, Pinoquercetin, Cupressuflavone, Puerarin xyloside, Forsythiaside and Paederoside. In GC-MS analysis, 19 compounds were identified in ethanolic leaves extract. The wound healing studies shows that O. indicum has promising wound healing activity by increasing the rate of wound contraction significantly (p < 0.05). Conclusion: In conclusion, the present study showed that O. indicum leaf contains important phytochemicals and the wound healing potential of the O. indicum extract may probably be as a result of the presence of various phytoconstituents.
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Affiliation(s)
- Ferid Abdulhafiz
- Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | | | - Anwar Hazim Hisam
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | - Ibtihal Mohammad
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | | | | | - Arifullah Mohammed
- Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | | | - Rumaizi Shaari
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | - Luqman Abu Bakar
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | - Zulhisyam Abdul Kari
- Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | - Lee Seong Wei
- Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Kota Bharu, Malaysia
| | - Khang Wen Goh
- Faculty of Data Science and Information Technology, INTI International University, Nilai, Malaysia
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Zhao M, Hao M, Tong H, Su L, Fei C, Gu W, Mao J, Lu T, Mao C. Screening of blood-activating active components from Curcuma wenyujin Y.H. Chen et C. Ling rhizome based on spectrum-effect relationship analysis and network pharmacology. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1188:123022. [PMID: 34933255 DOI: 10.1016/j.jchromb.2021.123022] [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: 06/22/2021] [Revised: 10/09/2021] [Accepted: 10/30/2021] [Indexed: 10/19/2022]
Abstract
Curcuma wenyujin Y.H. Chen et C. Ling rhizome (also called EZhu in China) has long been used as plant medicine for its traditional effect on promoting blood circulation and remove blood stasis. However, the active components of EZhu are still unclear at present. This research is managed to investigate the pharmacodynamics material basis on removing blood stasis of EZhu by exploring the spectrum-effect relationship between UPLC-Q/TOF-MS fingerprints and pharmacologic actions. Hemorheology and related functional parameters were detected to evaluate the pharmacologic actions of EZhu. Relative content Changes of components in rat plasma were detected by UPLC-Q/TOF-MS. A compound-target-pathway network was built to predict the pharmacological activity of components in plasma. Then, bivariate correlation analysis (BCA) was used to explore the correlation degree between components in plasma and pharmacologic actions of EZhu. In UPLC-Q/TOF-MS fingerprints of rat plasma, 10 prototype components were identified. BCA results show that 8 components were concerned with the pharmacological activity for treating blood stasis syndrome (BSS) in varying degrees (R > 0.5, P < 0.05). Among them, zedoarofuran and curzerenone have shown correlation with more pharmacological indicators. The network predicted that 80 targets were closely related to 10 components, in which 48 targets were connected with 159 metabolic pathways including arachidonic acid metabolism, sphingolipid signaling pathway, and linoleic acid metabolism. Overall, this study provided a scientific basis for TCM quality control to ensure its safety and efficacy.
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Affiliation(s)
- Mengting Zhao
- College of pharmacy, Guizhou University of Traditional Chinese Medicine, Guizhou (550025), China; College of pharmacy, Zhejiang Chinese Medical University, Hangzhou (310053), China
| | - Min Hao
- College of pharmacy, Zhejiang Chinese Medical University, Hangzhou (310053), China
| | - Huangjin Tong
- Affiliated hospital of integrated traditional Chinese and western medicine, Nanjing university of Chinese medicine, Nanjing (210028), China; College of pharmacy, Nanjing University of Chinese medicine, Nanjing (210023), China
| | - Lianlin Su
- College of pharmacy, Nanjing University of Chinese medicine, Nanjing (210023), China
| | - Chenghao Fei
- College of pharmacy, Nanjing University of Chinese medicine, Nanjing (210023), China
| | - Wei Gu
- College of pharmacy, Nanjing University of Chinese medicine, Nanjing (210023), China
| | - Jing Mao
- School of Medicine and Life Sciences, Nanjing University of Chinese Medicine, Nanjing (210023), China
| | - Tulin Lu
- College of pharmacy, Nanjing University of Chinese medicine, Nanjing (210023), China.
| | - Chunqin Mao
- College of pharmacy, Nanjing University of Chinese medicine, Nanjing (210023), China.
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Gaião Calixto M, Alves Ramos H, Veríssimo LS, Dantas Alves V, D Medeiros AC, Alencar Fernandes FH, Veras G. Trends and Application of Chemometric Pattern Recognition Techniques in Medicinal Plants Analysis. Crit Rev Anal Chem 2021; 53:326-338. [PMID: 34314279 DOI: 10.1080/10408347.2021.1953370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Medicinal plants have been used and studied for ages, from very old registers to modern ethnopharmacology, which encompasses analytical chemistry, foods, and pharmacy. Based on international norms and governmental organizations of health, phytomedicine-for example, herbal drugs-needs to guarantee the quality control of products and identify contaminants, biomarkers, and chemical profiles, among other issues. In this sense, is necessary to develop advanced analytical methods that show interesting possibilities and obtain a great amount of data. In order to treat the data, a set of mathematical and statistical procedures named chemometrics is necessary. In terms of herbal drugs, chemometric tools may be used to identify the following in plants: parts, development stages, processing, geographic origin, authentication, and chemical markers. This review describes applications of chemometric pattern recognition tools to analyze herbal drugs in different conditions associated with analytical methods in the last six years (2015-2020).
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Affiliation(s)
- Mariana Gaião Calixto
- Laboratório de Química Analítica e Quimiometria, Universidade Estadual da Paraíba, Campina Grande, Brasil
| | - Hilthon Alves Ramos
- Laboratório de Química Analítica e Quimiometria, Universidade Estadual da Paraíba, Campina Grande, Brasil
| | - Lucas Silva Veríssimo
- Laboratório de Química Analítica e Quimiometria, Universidade Estadual da Paraíba, Campina Grande, Brasil
| | - Vitor Dantas Alves
- Laboratório de Química Analítica e Quimiometria, Universidade Estadual da Paraíba, Campina Grande, Brasil
| | - Ana Cláudia D Medeiros
- Laboratório de Desenvolvimento e Ensaios de Medicamentos, Universidade Estadual da Paraíba, Campina Grande, Brasil
| | - Felipe Hugo Alencar Fernandes
- Laboratório de Desenvolvimento e Ensaios de Medicamentos, Universidade Estadual da Paraíba, Campina Grande, Brasil.,Centro Universitário UNIFACISA, Campina Grande, Brasil
| | - Germano Veras
- Laboratório de Química Analítica e Quimiometria, Universidade Estadual da Paraíba, Campina Grande, Brasil
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Darwish RS, Hammoda HM, Ghareeb DA, Abdelhamid ASA, Harraz FM, Shawky E. Seasonal dynamics of the phenolic constituents of the cones and leaves of oriental Thuja ( Platycladus orientalis L.) reveal their anti-inflammatory biomarkers. RSC Adv 2021; 11:24624-24635. [PMID: 35481004 PMCID: PMC9036908 DOI: 10.1039/d1ra01681d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/28/2021] [Indexed: 11/22/2022] Open
Abstract
In this study, the seasonal dynamics of the flavonoids in the cones and leaves of oriental Thuja (Platycladus orientalis L. Franco) as well as the in vitro anti-inflammatory activity of their extracts were investigated. The important chemical markers of the studied extracts were determined using untargeted HPTLC profiling, which was further utilized to assess the seasonality effect on the composition of these metabolites over three seasonal cycles. A quantitative HPTLC method was developed and validated for the identified chemical markers of oriental Thuja: hyperoside, quercetrin, isoscutellarein-7-O-β-xyloside, cupressuflavone, hinokiflavone, sotetsuflavone and isoscutellarein-8-methyl ether. The highest amounts of flavonoids were observed during the summer and winter seasons, where the leaves possessed higher contents of flavonoids compared to cones. Flavone glycosides are a major class of flavones encountered in leaves, while the cones mainly accumulated biflavones. The results showed that the effect of seasonal variation on the accumulation of flavonoids within the cones was less pronounced than in the leaves. The summer leaves showed a remarkable reduction in the levels of INF-γ, where the value decreased to 80.7 ± 1.25 pg mL-1, a significantly lower level than that obtained with piroxicam (180 ± 1.47 pg mL-1); this suggests a noteworthy anti-inflammatory potential. OPLS (orthogonal projection to latent structures) models showed that flavonoidal glycosides, quercetrin, hyperoside and isoscutellarein-7-O-β-xyloside were the most contributing biomarkers to the reduction in pro-inflammatory mediators in LPS-stimulated WBCs. The results obtained in the study can thus be exploited to establish the best organs as well as the optimal periods of the year for collecting and obtaining certain biomarkers at high concentrations to guarantee the efficacy of the obtained extracts.
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Affiliation(s)
- Reham S Darwish
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University Alkhartoom Square Alexandria 21521 Egypt +20-34871668-4873273
| | - Hala M Hammoda
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University Alkhartoom Square Alexandria 21521 Egypt +20-34871668-4873273
| | - Doaa A Ghareeb
- Biological Screening and Preclinical Trial Laboratory, Department of Biochemistry, Faculty of Science, Alexandria University Alexandria Egypt
- Pharmaceutical and Fermentation Industries Development Centre, City of Scientific Research and Technological Applications (SRTA-City) Borg Al-Arab Alexandria Egypt
| | - Ali S A Abdelhamid
- Pharmaceutical and Fermentation Industries Development Centre, City of Scientific Research and Technological Applications (SRTA-City) Borg Al-Arab Alexandria Egypt
| | - Fathallah M Harraz
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University Alkhartoom Square Alexandria 21521 Egypt +20-34871668-4873273
| | - Eman Shawky
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University Alkhartoom Square Alexandria 21521 Egypt +20-34871668-4873273
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6
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Yao M, Zhao H, Qi X, Xu Y, Liu W, Li C. Establishment and comparative analysis of HPLC fingerprints of deer tissues. ANIMAL PRODUCTION SCIENCE 2020. [DOI: 10.1071/an19554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Context
With the increasing use of velvet antlers (VA) as functional food or traditional Chinese medicine, the quality control has become more and more important.
Aims
Establish an effective method to provide a way of distinguishing VA from other types of deer tissue.
Methods
In the present study, 18 samples from three types of deer tissue were analysed on the basis of high-performance liquid chromatography, and a chromatogram of each sample was obtained. Then, these chromatograms were processed using the similarity evaluation system for chromatographic fingerprints of traditional Chinese medicine, to give the fingerprints of three deer tissues. The chemometric methods were used to analyse the fingerprint results, so as to identify the three types of deer tissue.
Key results
Shared peaks of VA, venison and deer bone were identified using similarity evaluation system. The results showed that, in total, 19 peaks were identified among these three types of deer tissue. Compared with venison, VA lacked three peaks (Numbers 3, 4 and 17); compared with deer bone, VA had six extra peaks (Numbers 2, 5, 8, 9, 14 and 19). The results of chemometric methods showed that different tissue samples could be classified into three categories by using both cluster analysis and principal component analysis. After principal component analysis and partial least-square discrimination analysis, seven peaks were selected, which had significant influence on the classification of VA, venison and deer bone.
Conclusions
The high-performance liquid-chromatography fingerprints in combination with chemometric methods can be used to effectively distinguish three deer tissue types, namely, VA, venison and deer bone.
Implications
We believe the method offers a useful tool much needed in the current Chinese velvet market.
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7
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Ding M, Li J, Zou S, Tang G, Gao X, Chang YX. Simultaneous Extraction and Determination of Compounds With Different Polarities From Platycladi Cacumen by AQ C 18-Based Vortex-Homogenized Matrix Solid-Phase Dispersion With Ionic Liquid. Front Pharmacol 2019; 9:1532. [PMID: 30687095 PMCID: PMC6333750 DOI: 10.3389/fphar.2018.01532] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 12/13/2018] [Indexed: 01/22/2023] Open
Abstract
This study presented a rapid, simple and environmentally friendly method of employing AQ C18-based vortex-homogenized matrix solid-phase dispersion with ionic liquid (AQ C18-IL-VHMSPD) for the extraction of compounds with different polarities from Platycladi Cacumen (PC) samples by ultra high-performance liquid chromatography with PDA detection. AQ C18 (aqua C18) and ionic liquid ([Bmim]BF4) were used as the adsorbent and green elution reagent in vortex-homogenized MSPD procedure. The AQ C18-IL-VHMSPD conditions were optimized by studying several experimental parameters including the type of ionic liquid, the type of adsorbent, ratio of sample to adsorbent, the concentration and volume of ionic liquid, grinding time and vortex time. The recoveries of the target compounds were in the range of 96.9-104% with relative standard deviation values no more than 2.8%. The limits of detection and limits of quantitation were in the range of 0.2-1.2 and 1.0-5.4 ng mL-1, respectively. Compared with the traditional ultrasonic-assisted extraction, the developed AQ C18-IL-VHMSPD method required less sample, reagent and time. It was concluded that the AQ C18-IL-VHMSPD method was a powerful method for the extraction and quantification of the high polarity and low polarity compounds in traditional Chinese medicines samples.
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Affiliation(s)
- Mingya Ding
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Jin Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Shuhan Zou
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Ge Tang
- Department of Nephrology, The First Teaching Hospital, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xiumei Gao
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yan-Xu Chang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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Shan CX, Guo SC, Yu S, Shan MQ, Li SFY, Chai C, Cui XB, Zhang L, Ding AW, Wu QN. Simultaneous Determination of Quercitrin, Afzelin, Amentoflavone, Hinokiflavone in Rat Plasma by UFLC–MS-MS and Its Application to the Pharmacokinetics of Platycladus orientalis Leaves Extract. J Chromatogr Sci 2018; 56:895-902. [DOI: 10.1093/chromsci/bmy066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 06/13/2018] [Indexed: 12/18/2022]
Abstract
Abstract
Leaves of Platycladus orientalis have been used as blood cooling and homeostatic therapy for thousands of years in traditional Chinese medicine. Emerging evidences of modern pharmacology have proved flavonoids as the key elements responsible for the efficacies. However, there has been no report on pharmacokinetic study of the flavonoids from Platycladus orientalis leaves extract. In this study, a sensitive and rapid ultra-flow liquid chromatography-tandem mass spectrometry method was established and validated for the simultaneous determination of amentoflavone, afzelin, hinokiflavone and quercitrin in rat plasma. The four flavonoids and luteolin (internal standard, IS) were recovered from rat plasma by methanol–ethyl acetate (v:v, 50:50). Chromatographic separation was performed on a C18 column with gradient elution. Our results showed that the recoveries from spiked control samples were more than 85% for all analytes and IS. The relative standard deviations of intra-day and inter-day precision were within 15% while the REs ranged from −6.6% to 8.0%. The validated method in this study was successfully applied to pharmacokinetic study in healthy rats after oral administration of P. orientalis leaves extract.
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Affiliation(s)
- Chen-xiao Shan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Shu-chen Guo
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Sheng Yu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Ming-qiu Shan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
- Department of Chemistry, National University of Singapore, Singapore, Singapore
| | - Sam Fong Yau Li
- Department of Chemistry, National University of Singapore, Singapore, Singapore
| | - Chuan Chai
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Xiao-bing Cui
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Li Zhang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - An-wei Ding
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Qi-nan Wu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
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