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Gao J, Su G, Chen W, Wu Q, Liu J, Liu J, Chai M, Dong Y, Wang H, Chen L, Zhang Z, Wang M. Mechanism of ligusticum cycloprolactam against neuroinflammation based on network pharmacology and experimental verification. Clin Exp Pharmacol Physiol 2023. [PMID: 37308175 DOI: 10.1111/1440-1681.13784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 04/05/2023] [Accepted: 04/26/2023] [Indexed: 06/14/2023]
Abstract
Ligustilide, a natural phthalide mainly derived from chuanxiong rhizomes and Angelica Sinensis roots, possesses anti-inflammatory activity, particularly in the context of the nervous system. However, its application is limited because of its unstable chemical properties. To overcome this limitation, ligusticum cycloprolactam (LIGc) was synthesized through structural modification of ligustilide. In this study, we combined network pharmacological methods with experimental verification to investigate the anti-neuroinflammatory effects and mechanisms of ligustilide and LIGc. Based on our network pharmacology analysis, we identified four key targets of ligustilide involved in exerting an anti-inflammatory effect, with the nuclear factor (NF)-κB signal pathway suggested as the main signalling pathway. To verify these results, we examined the expression of inflammatory cytokines and inflammation-related proteins, analysed the phosphorylation level of NF-κB, inhibitor of κBα (IκBα) and inhibitor of κB kinase α and β (IKKα+β), and evaluated the effect of BV2 cell-conditioned medium on HT22 cells in vitro. Our results, demonstrate for the first time that LIGc can downregulate the activation of the NF-κB signal pathway in BV2 cells induced by lipopolysaccharide, suppress the production of inflammatory cytokines and reduce nerve injury in HT22 cells mediated by BV2 cells. These findings suggest that LIGc inhibits the neuroinflammatory response mediated by BV2 cells, providing strong scientific support for the development of anti-inflammatory drugs based on natural ligustilide or its derivatives. However, there are some limitations to our current study. In the future, further experiments using in vivo models may provide additional evidence to support our findings.
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Affiliation(s)
- Juan Gao
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Gang Su
- Institute of Genetics, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Wei Chen
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Qionghui Wu
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Junxi Liu
- Chinese Academy of Sciences Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Jifei Liu
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Miao Chai
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Ying Dong
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - He Wang
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Lixia Chen
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Zhenchang Zhang
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Manxia Wang
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
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qNMR as an analytical technique for essential oils: quantitative analysis of Eucalyptus tereticornis leaf oil. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02700-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Imai A, Lankin DC, Gödecke T, Chen SN, Pauli GF. NMR based quantitation of cycloartane triterpenes in black cohosh extracts. Fitoterapia 2019; 141:104467. [PMID: 31887327 DOI: 10.1016/j.fitote.2019.104467] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/21/2019] [Accepted: 12/27/2019] [Indexed: 01/19/2023]
Abstract
The cycloartane triterpene content in the roots/rhizomes (RR) and aerial parts (PX) of Actaea racemosa (AR), A. podocarpa (AP), and A. cordifolia (AC) have been investigated by quantitative 1H NMR (qHNMR). Thereby, it was demonstrated that qHNMR represents a powerful methodology for the analysis of crude plant extracts as it does not rely on the rarely available identical reference triterpenes. Specifically, the presence of the characteristic C-19 cyclopropane (exo/endo) hydrogen signals made it possible to quantify the less common/not ubiquitously present group of cycloartane triterpenes, directly in extracts. As an example, ARPX and ARRR were shown to contain, 3.8-20.8% ± 8.2% and 7.2-19.3% ± 4.0% of cycloartane triterpenes, respectively. The cycloartane concentration in ACPX and ACRR was 7.5-8.7% ± 0.8% and 13.9-28.5% ± 7.3%, respectively, based on the weight of the extract. AP was shown to contain notably lower amounts of the cycloartane triterpenes as compared to AR and AC in the roots/rhizomes. The content for APPX and APRR was only 2.1-3.3% ± 0.7% and 1.1-4.0% ± 1.5%, respectively. In addition, an example is presented for the identification of specific cycloartanes as marker compounds for AR within crude extracts based on the same qHNMR spectra and 2D NMR methods.
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Affiliation(s)
- Ayano Imai
- UIC/NIH Center for Botanical Dietary Supplements Research, Program for Collaborative Research in the Pharmaceutical Sciences (PCRPS) and Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - David C Lankin
- UIC/NIH Center for Botanical Dietary Supplements Research, Program for Collaborative Research in the Pharmaceutical Sciences (PCRPS) and Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Tanja Gödecke
- UIC/NIH Center for Botanical Dietary Supplements Research, Program for Collaborative Research in the Pharmaceutical Sciences (PCRPS) and Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Program for Collaborative Research in the Pharmaceutical Sciences (PCRPS) and Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Guido F Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Program for Collaborative Research in the Pharmaceutical Sciences (PCRPS) and Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States.
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Chen JY, Wang YH, Hidajah AC, Li CY. A population-based case-control study on the association of Angelica sinensis exposure with risk of breast cancer. J Tradit Complement Med 2019; 10:454-459. [PMID: 32953561 PMCID: PMC7484959 DOI: 10.1016/j.jtcme.2019.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 10/15/2019] [Accepted: 10/19/2019] [Indexed: 01/09/2023] Open
Abstract
Background Due to a lack of evidence from large-scale epidemiological studies by far on this issue, whether there is a link between Angelica sinensis exposure and breast cancer risk remained inconclusive. Methods We conducted a population-based case-control study using Taiwan’s National Health Insurance claim data, in which all breast cancer patients newly diagnosed between 2005 and 2008 were employed as the case group (n = 34,262) and a random sample of non-breast cancer individuals selected from 1-million beneficiaries registered in 2005 was served as the control group. For fair comparability, we employed the time density sampling method to select controls who were matched to case on date of breast cancer diagnosis and age with a case/control ratio of 1/3 (n = 102,786). Results We found that the use of Angelica sinensis presents a weakly but significantly protective effect on breast cancer (adjusted odds ratio (aOR) 0.95, 95% confidence interval (CI) 0.93–0.98), with a significant dose-gradient relationship. We also noted a stronger association with breast cancer with initial use of Angelica sinensis at a longer time before breast cancer diagnosis, and found that the seemingly protective effect of Angelica sinensis was more obvious among women who had initial use at 47–55 years (aOR 0.93, 95% CI 0.88–0.98). Conclusion This population-based case-control study revealed that exposure to Angelica sinensis showed a weakly but significantly protective effect on breast cancer risk, which could ease people’s concern over the potential carcinogenic effect from exposure to Angelica sinensis. Angelica sinensis was associated with a weakly protective effect on breast cancer. The methodological strengths included population-based and a fairy large sample size. Provide further insight to the link between phytohormone in TCM and breast cancer.
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Affiliation(s)
- Jhong-Yuan Chen
- Department of Traditional Chinese Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No.100, Tzyou 1st Road, Kaohsiung, Taiwan.,Department of Public Health, College of Medicine, National Cheng Kung University, No.1, University Road, East District, Tainan, Taiwan
| | - Yi-Hsiu Wang
- Department of Traditional Chinese Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No.100, Tzyou 1st Road, Kaohsiung, Taiwan
| | - Atik Choirul Hidajah
- Department of Epidemiology, Faculty of Public Health, Universitas Airlangga, Kampus C UNAIR, Jl. Mulyorejo Surabaya, East Java, Indonesia
| | - Chung-Yi Li
- Department of Public Health, College of Medicine, National Cheng Kung University, No.1, University Road, East District, Tainan, Taiwan.,Department of Epidemiology, Faculty of Public Health, Universitas Airlangga, Kampus C UNAIR, Jl. Mulyorejo Surabaya, East Java, Indonesia.,Department of Public Health, College of Public Health, China Medical University, No.91, Xueshi Road, North District, Taichung, Taiwan
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Bastian F, Ito Y, Ogahara E, Ganeko N, Hatano T, Ito H. Simultaneous Quantification of Ellagitannins and Related Polyphenols in Geranium thunbergii Using Quantitative NMR. Molecules 2018; 23:molecules23061346. [PMID: 29867008 PMCID: PMC6099742 DOI: 10.3390/molecules23061346] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/01/2018] [Accepted: 06/02/2018] [Indexed: 11/21/2022] Open
Abstract
Compared to commonly employed liquid chromatography-based methods, quantitative nuclear magnetic resonance (qNMR) is a recently developed method for accurate quantification of natural compounds in extracts. The simultaneous quantification of ellagitannins and the related polyphenols of Geranium thunbergii were studied using qNMR after a short-term and long-term decoction. The qNMR fingerprint for quantifying ellagitannin was presented in this work. Geraniin was observed in the short-term decoction as a major component while corilagin was the major component of the long-term decoction. An aqueous acetone extract of G. thunbergii after long-term decoction was extracted with diethyl ether, ethyl acetate, and n-butanol. Corilagin was found as a major constituent in the ethyl acetate and n-butanol extracts. Furthermore, the contents of these polyphenols in G. thunbergii from six locations in Japan and three locations in China were quantified. The contents of geraniin and corilagin in G. thunbergii from Japan were higher than those from China. Our finding raised the possibility that qNMR can be effectively employed as a simple, accurate, and efficient method for quantification of ellagitannins in medicinal plants.
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Affiliation(s)
- Februadi Bastian
- Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan.
| | - Yurie Ito
- Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan.
| | - Erika Ogahara
- Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry, Pharmaceutical Sciences, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
| | - Natsuki Ganeko
- Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan.
| | - Tsutomu Hatano
- Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry, Pharmaceutical Sciences, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
| | - Hideyuki Ito
- Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan.
- Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry, Pharmaceutical Sciences, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
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Jadeja Y, Chomal B, Patel M, Jebaliya H, Khunt R, Shah A. Method development and validation: quantitation of telmisartan bulk drug and its tablet formulation by 1 H NMR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:634-638. [PMID: 27966230 DOI: 10.1002/mrc.4565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/23/2016] [Accepted: 12/09/2016] [Indexed: 06/06/2023]
Abstract
The quantitative NMR (qNMR) spectroscopy is nowadays a new tool for the determination of pharmaceutical potent biologically active molecules in bulk drug and its tablet formulation than the other analytical techniques. Herein, qNMR method was developed for an anti-hypertensive drug, telmisartan in bulk drug and its tablet formulation. The precise method was developed by using malononitrile as an internal standard. The methylene signal of telmisartan appeared at δ = 5.46 ppm (singlet) relative to the signal of malononitrile at δ = 3.59 ppm (singlet) in CDCl3 , as an NMR solvent. The development and validation of the method were carried out as per International Conference on Harmonization guidelines. The method was found to be linear (r2 = 0.9999) for 0.5 to 3.5 mg/ml in the drug concentration range. The relative standard deviation for accuracy and precession was not more than 2.0%. The sensitivity of the method was carried out by limit of detection and a limit of quantification, at 0.05 and 0.2 mg/ml, respectively, concentration. The robustness of the method was studied by changing parameters as well as different solvent manufacturer company. The result shows that method was accurately developed for quantification of telmisartan in pharmaceutical dosage form. The developed method by 1 H NMR spectroscopy is comparatively easy and more precise with respect to the other analytical tools. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Yashwantsinh Jadeja
- Centre of Excellence, National Facility for Drug Discovery (NFDD) Complex, Department of Chemistry, Saurashtra University, Rajkot, 360 005, Gujarat, India
| | - Bhagyawanti Chomal
- Centre of Excellence, National Facility for Drug Discovery (NFDD) Complex, Department of Chemistry, Saurashtra University, Rajkot, 360 005, Gujarat, India
| | - Madhavi Patel
- Centre of Excellence, National Facility for Drug Discovery (NFDD) Complex, Department of Chemistry, Saurashtra University, Rajkot, 360 005, Gujarat, India
| | - Hetal Jebaliya
- Centre of Excellence, National Facility for Drug Discovery (NFDD) Complex, Department of Chemistry, Saurashtra University, Rajkot, 360 005, Gujarat, India
| | - Ranjan Khunt
- Centre of Excellence, National Facility for Drug Discovery (NFDD) Complex, Department of Chemistry, Saurashtra University, Rajkot, 360 005, Gujarat, India
| | - Anamik Shah
- Centre of Excellence, National Facility for Drug Discovery (NFDD) Complex, Department of Chemistry, Saurashtra University, Rajkot, 360 005, Gujarat, India
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Dietz BM, Hajirahimkhan A, Dunlap TL, Bolton JL. Botanicals and Their Bioactive Phytochemicals for Women's Health. Pharmacol Rev 2016; 68:1026-1073. [PMID: 27677719 PMCID: PMC5050441 DOI: 10.1124/pr.115.010843] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Botanical dietary supplements are increasingly popular for women's health, particularly for older women. The specific botanicals women take vary as a function of age. Younger women will use botanicals for urinary tract infections, especially Vaccinium macrocarpon (cranberry), where there is evidence for efficacy. Botanical dietary supplements for premenstrual syndrome (PMS) are less commonly used, and rigorous clinical trials have not been done. Some examples include Vitex agnus-castus (chasteberry), Angelica sinensis (dong quai), Viburnum opulus/prunifolium (cramp bark and black haw), and Zingiber officinale (ginger). Pregnant women have also used ginger for relief from nausea. Natural galactagogues for lactating women include Trigonella foenum-graecum (fenugreek) and Silybum marianum (milk thistle); however, rigorous safety and efficacy studies are lacking. Older women suffering menopausal symptoms are increasingly likely to use botanicals, especially since the Women's Health Initiative showed an increased risk for breast cancer associated with traditional hormone therapy. Serotonergic mechanisms similar to antidepressants have been proposed for Actaea/Cimicifuga racemosa (black cohosh) and Valeriana officinalis (valerian). Plant extracts with estrogenic activities for menopausal symptom relief include Glycine max (soy), Trifolium pratense (red clover), Pueraria lobata (kudzu), Humulus lupulus (hops), Glycyrrhiza species (licorice), Rheum rhaponticum (rhubarb), Vitex agnus-castus (chasteberry), Linum usitatissimum (flaxseed), Epimedium species (herba Epimedii, horny goat weed), and Medicago sativa (alfalfa). Some of the estrogenic botanicals have also been shown to have protective effects against osteoporosis. Several of these botanicals could have additional breast cancer preventive effects linked to hormonal, chemical, inflammatory, and/or epigenetic pathways. Finally, although botanicals are perceived as natural safe remedies, it is important for women and their healthcare providers to realize that they have not been rigorously tested for potential toxic effects and/or drug/botanical interactions. Understanding the mechanism of action of these supplements used for women's health will ultimately lead to standardized botanical products with higher efficacy, safety, and chemopreventive properties.
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Affiliation(s)
- Birgit M Dietz
- University of Illinois at Chicago/National Institutes of Health Center for Botanical Dietary Supplements, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
| | - Atieh Hajirahimkhan
- University of Illinois at Chicago/National Institutes of Health Center for Botanical Dietary Supplements, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
| | - Tareisha L Dunlap
- University of Illinois at Chicago/National Institutes of Health Center for Botanical Dietary Supplements, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
| | - Judy L Bolton
- University of Illinois at Chicago/National Institutes of Health Center for Botanical Dietary Supplements, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
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Wei WL, Zeng R, Gu CM, Qu Y, Huang LF. Angelica sinensis in China-A review of botanical profile, ethnopharmacology, phytochemistry and chemical analysis. JOURNAL OF ETHNOPHARMACOLOGY 2016; 190:116-141. [PMID: 27211015 DOI: 10.1016/j.jep.2016.05.023] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 05/07/2016] [Accepted: 05/10/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Angelica sinensis (Oliv.) Diels, known as Dang Gui (in Chinese), is a traditional medicinal and edible plant that has long been used for tonifying, replenishing, and invigorating blood as well as relieving pain, lubricating the intestines, and treating female irregular menstruation and amenorrhea. A. sinensis has also been used as a health product and become increasingly popular in China, Japan, and Korea. AIM OF THE REVIEW This paper aims to provide a systemic review of traditional uses of A. sinensis and its recent advances in the fields of phytochemistry, analytical methods and toxicology. In addition, possible trends, therapeutic potentials, and perspectives for future research of this plant are also briefly discussed. MATERIALS AND METHODS An extensive review of the literature was conducted, and electronic databases including China National Knowledge Infrastructure, PubMed, Google Scholar, Science Direct, and Reaxys were used to assemble the data. Ethnopharmacological literature and digitalised sources of academic libraries were also systematically searched. In addition, information was obtained from local books and The Plant List (TPL, www.theplantlist.org). RESULT This study reviews the progress in chemical analysis of A. sinensis and its preparations. Previously and newly established methods, including spectroscopy, thin-layer chromatography (TLC), gas chromatography (GC), high-performance liquid chromatography (HPLC), ultra-performance liquid chromatography(UPLC), and nuclear magnetic resonance analysis (NMR), are summarized. Moreover, identified bioactive components such as polysaccharides, ligustilide and ferulic acid were reviewed, along with analytical methods for quantitative and qualitative determination of target analytes, and fingerprinting authentication, quality evaluation of A. sinensis, and toxicology and pharmacodynamic studies. Scientific reports on crude extracts and pure compounds and formulations revealed a wide range of pharmacological activities, including anti-inflammatory activity, antifibrotic action, antispasmodic activity, antioxidant activities, and neuroprotective action, as well as cardio- and cerebrovascular effects. CONCLUSIONS Within the published scientific literature are numerous reports regarding analytical methods that use various chromatographic and spectrophotometric technologies to monitor various types of components with different physicochemical properties simultaneously. This review discusses the reasonable selection of marker compounds based on high concentrations, analytical methods, and commercial availabilities with the goal of developing quick, accurate, and applicable analytical approaches for quality evaluation and establishing harmonised criteria for the analysis of A. sinensis and its finished products. Compounds isolated from A. sinensis are abundant sources of chemical diversity, from which we can discover active molecules. Thus, more studies on the pharmacological mechanisms of the predominant active compounds of A. sinensis are needed. In addition, given that A. sinensis is one of the most popular traditional herbal medicines, its main therapeutic aspects, toxicity, and adverse effects warrant further investigation in the future.
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Affiliation(s)
- Wen-Long Wei
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
| | - Rui Zeng
- College of Pharmacy, Southwest University for Nationalities, Chengdu 610041, China
| | - Cai-Mei Gu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
| | - Yan Qu
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Lin-Fang Huang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
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Sahu A, Narayanam M, Kurmi M, Ladumor MK, Singh S. Quantitation of memantine hydrochloride bulk drug and its tablet formulation using proton nuclear magnetic resonance spectrometry. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2016; 54:632-636. [PMID: 26923624 DOI: 10.1002/mrc.4421] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/09/2015] [Accepted: 01/30/2016] [Indexed: 06/05/2023]
Abstract
The use of quantitative nuclear magnetic resonance spectrometry for the determination of non-UV active memantine hydrochloride with relative simplicity and precision has been demonstrated in this study. The method was developed on a 500 MHz NMR instrument and was applied to determination of the drug in a tablet formulation. The analysis was performed by taking caffeine as an internal standard and D2 O as the NMR solvent. The signal of methyl protons of memantine hydrochloride appeared at 0.75 ppm (singlet) relative to the signal of caffeine (internal standard) at 3.13 ppm (singlet). The method was found to be linear (r(2) = 0.9989) in the drug concentration range of 0.025 to 0.80 mg/ml. The maximum relative standard deviation for accuracy and precision was <2. The limits of detection and quantification were 0.04 and 0.11 mg/ml, respectively. The robustness of the method was revealed by changing nine different parameters. The deviation for each parameter was also within the acceptable limits. The study highlighted possibility of direct determination of memantine hydrochloride in pure form and in its marketed tablet formulation by the use of quantitative NMR, without the need of derivatization, as is the requirement in HPLC studies. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Archana Sahu
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160 062, Punjab, India
| | | | - Moolchand Kurmi
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160 062, Punjab, India
| | - Mayurbhai Kathadbhai Ladumor
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160 062, Punjab, India
| | - Saranjit Singh
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160 062, Punjab, India
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Singh S, Roy R. The application of absolute quantitative (1)H NMR spectroscopy in drug discovery and development. Expert Opin Drug Discov 2016; 11:695-706. [PMID: 27187052 DOI: 10.1080/17460441.2016.1189899] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
INTRODUCTION The identification of a drug candidate and its structural determination is the most important step in the process of the drug discovery and for this, nuclear magnetic resonance (NMR) is one of the most selective analytical techniques. AREA COVERED The present review illustrates the various perspectives of absolute quantitative (1)H NMR spectroscopy in drug discovery and development. It deals with the fundamentals of quantitative NMR (qNMR), the physiochemical properties affecting qNMR, and the latest referencing techniques used for quantification. The precise application of qNMR during various stages of drug discovery and development, namely natural product research, drug quantitation in dosage forms, drug metabolism studies, impurity profiling and solubility measurements is elaborated. To achieve this, the authors explore the literature of NMR in drug discovery and development between 1963 and 2015. It also takes into account several other reviews on the subject. EXPERT OPINION qNMR experiments are used for drug discovery and development processes as it is a non-destructive, versatile and robust technique with high intra and interpersonal variability. However, there are several limitations also. qNMR of complex biological samples is incorporated with peak overlap and a low limit of quantification and this can be overcome by using hyphenated chromatographic techniques in addition to NMR.
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Affiliation(s)
- Suruchi Singh
- a Centre of Biomedical Research, Formerly Centre of Biomedical Magnetic Resonance , Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Lucknow , India
| | - Raja Roy
- a Centre of Biomedical Research, Formerly Centre of Biomedical Magnetic Resonance , Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Lucknow , India
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Sorkin BC, Kuszak AJ, Williamson JS, Hopp DC, Betz JM. The Challenge of Reproducibility and Accuracy in Nutrition Research: Resources and Pitfalls. Adv Nutr 2016; 7:383-9. [PMID: 26980822 PMCID: PMC4785474 DOI: 10.3945/an.115.010595] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Inconsistent and contradictory results from nutrition studies conducted by different investigators continue to emerge, in part because of the inherent variability of natural products, as well as the unknown and therefore uncontrolled variables in study populations and experimental designs. Given these challenges inherent in nutrition research, it is critical for the progress of the field that researchers strive to minimize variability within studies and enhance comparability between studies by optimizing the characterization, control, and reporting of products, reagents, and model systems used, as well as the rigor and reporting of experimental designs, protocols, and data analysis. Here we describe some recent developments relevant to research on plant-derived products used in nutrition research, highlight some resources for optimizing the characterization and reporting of research using these products, and describe some of the pitfalls that may be avoided by adherence to these recommendations.
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Affiliation(s)
| | | | - John S Williamson
- National Center for Complementary and Integrative Health, NIH, Bethesda, MD
| | - D Craig Hopp
- National Center for Complementary and Integrative Health, NIH, Bethesda, MD
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Riihinen KR, Ou ZM, Gödecke T, Lankin DC, Pauli GF, Wu CD. The antibiofilm activity of lingonberry flavonoids against oral pathogens is a case connected to residual complexity. Fitoterapia 2014; 97:78-86. [DOI: 10.1016/j.fitote.2014.05.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 05/18/2014] [Accepted: 05/21/2014] [Indexed: 12/15/2022]
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13
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Kuchta K, Ortwein J, Hennig L, Rauwald HW. 1H-qNMR for direct quantification of stachydrine in Leonurus japonicus and L. cardiaca. Fitoterapia 2014; 96:8-17. [DOI: 10.1016/j.fitote.2014.03.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/20/2014] [Accepted: 03/26/2014] [Indexed: 11/30/2022]
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Di Pierro F. Roles of chemical complexity and evolutionary theory in some hepatic and intestinal enzymatic systems in chemical reproducibility and clinical efficiency of herbal derivatives. ScientificWorldJournal 2014; 2014:732045. [PMID: 24977222 PMCID: PMC3997956 DOI: 10.1155/2014/732045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 03/06/2014] [Indexed: 12/25/2022] Open
Abstract
Despite the great marketing success, most physicians attribute poor efficacy to herbals. This perception is due to two situations that are an integral part of the herbal topic. The first is the poor phytochemical reproducibility obtained during the production process of herbal extracts, as herbal extracts are not always standardized in the whole manufacturing process, but only in their titer. The second problem is linked to the evolution of important enzymatic systems: cytochromes and ABC proteins. They are both enzyme classes with detoxifying properties and seem to have evolved from the molecular mould provided by active plant substances. During the evolution, as still happens today, polyphenols, saponins, terpenes, and alkaloids were ingested together with food. They do not possess any nutritional value but seem to be provided with a potential pharmacological activity. Cytochromes and ABC proteins, which evolved over time to detoxify food from vegetable chemical "actives," now seem to limit the action of herbal derivatives. The comprehension of these 2 events may explain the origin of the widespread scepticism of physicians about herbal medicine and suggests that, after correct herbal standardization, use of antagonists of cytochromes and ABC systems will make it possible to recover their pharmacological potential.
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Affiliation(s)
- Francesco Di Pierro
- Scientific Department, Velleja Research, Viale Lunigiana 23, 20125, Milano, Italy
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Liang X, Du L, Su F, Parekh HS, Su W. The application of quantitative NMR for the facile, rapid and reliable determination of clindamycin phosphate in a conventional tablet formulation. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:178-82. [PMID: 24464591 DOI: 10.1002/mrc.4048] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 11/22/2013] [Accepted: 01/01/2014] [Indexed: 05/16/2023]
Abstract
Spectroscopic tools such as NMR can be applied to the quantitative analysis of active pharmaceutical ingredients with relative ease and accuracy. Here, we demonstrate the quantification of clindamycin phosphate (CLP) in a conventional tablet formulation, performed using potassium hydrogen phthalate (KHP) as the internal standard and deuterium oxide (D2O) as the NMR solvent. The methyl protons signal of CLP at 0.72 ppm (triplet) relative to the signal of KHP at 7.37-7.40 ppm (multiplet) was used for quantification purposes using (1)H NMR. This method was shown to be specific and linear (r = 0.9997) within the CLP concentration range from 7.2 to 23.1 mg per 0.5 ml of D2O. The maximum relative standard deviation (RSD) of accuracy and precision was calculated at 0.39% and 0.64%, respectively. The limits of detection (LOD) and quantification were 0.04 and 0.11 mg/ml, respectively. The method was highly stable with a calculated RSD of 0.03%. The robustness of the method was demonstrated by changing four different parameters, and the difference among each parameter was ≤ 0.78%. The findings of this work were in good agreement with previously reported conventional HPLC-based approaches, highlighting its applicability in the determination of other active pharmaceutical ingredients in conventional formulations for quality control purposes.
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Affiliation(s)
- Xianrui Liang
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
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Gödecke T, Napolitano JG, Rodríguez-Brasco MF, Chen SN, Jaki BU, Lankin DC, Pauli GF. Validation of a generic quantitative (1)H NMR method for natural products analysis. PHYTOCHEMICAL ANALYSIS : PCA 2013; 24:581-97. [PMID: 23740625 PMCID: PMC3990190 DOI: 10.1002/pca.2436] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 01/29/2013] [Accepted: 02/03/2013] [Indexed: 05/19/2023]
Abstract
INTRODUCTION Nuclear magnetic resonance (NMR) spectroscopy is increasingly employed in the quantitative analysis and quality control (QC) of natural products (NP) including botanical dietary supplements (BDS). The establishment of QC protocols based on quantitative (1) H NMR (qHNMR) requires method validation. OBJECTIVE Develop and validate a generic qHNMR method. Optimize acquisition and processing parameters, with specific attention to the requirements for the analysis of complex NP samples, including botanicals and purity assessment of NP isolates. METHODS In order to establish the validated qHNMR method, samples containing two highly pure reference materials were used. The influence of acquisition and processing parameters on the method validation was examined, and general aspects of method validation of qHNMR methods discussed. Subsequently, the method established was applied to the analysis of two NP samples: a purified reference compound and a crude mixture. RESULTS The accuracy and precision of qHNMR using internal or external calibration were compared, using a validated method suitable for complex samples. The impact of post-acquisition processing on method validation was examined using three software packages: TopSpin, Mnova and NUTS. The dynamic range of the qHNMR method developed was 5000:1 with a limit of detection (LOD) of better than 10 µm. The limit of quantification (LOQ) depends on the desired level of accuracy and experiment time spent. CONCLUSION This study revealed that acquisition parameters, processing parameters and processing software all contribute to qHNMR method validation. A validated method with a high dynamic range and general workflow for qHNMR analysis of NP is proposed.
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Affiliation(s)
- Tanja Gödecke
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - José G. Napolitano
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - María F. Rodríguez-Brasco
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Shao-Nong Chen
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Birgit U. Jaki
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - David C. Lankin
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Guido F. Pauli
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
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17
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Simmler C, Napolitano JG, McAlpine JB, Chen SN, Pauli GF. Universal quantitative NMR analysis of complex natural samples. Curr Opin Biotechnol 2013; 25:51-9. [PMID: 24484881 DOI: 10.1016/j.copbio.2013.08.004] [Citation(s) in RCA: 226] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Accepted: 08/09/2013] [Indexed: 12/25/2022]
Abstract
Nuclear Magnetic Resonance (NMR) is a universal and quantitative analytical technique. Being a unique structural tool, NMR also competes with metrological techniques for purity determination and reference material analysis. In pharmaceutical research, applications of quantitative NMR (qNMR) cover mostly the identification and quantification of drug and biological metabolites. Offering an unbiased view of the sample composition, and the possibility to simultaneously quantify multiple compounds, qNMR has become the method of choice for metabolomic studies and quality control of complex natural samples such as foods, plants or herbal remedies, and biofluids. In this regard, NMR-based metabolomic studies, dedicated to both the characterization of herbal remedies and clinical diagnosis, have increased considerably.
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Affiliation(s)
- Charlotte Simmler
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, College of Pharmacy, 833 S. Wood Street, Chicago, IL, United States
| | - José G Napolitano
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, College of Pharmacy, 833 S. Wood Street, Chicago, IL, United States
| | - James B McAlpine
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, College of Pharmacy, 833 S. Wood Street, Chicago, IL, United States
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, College of Pharmacy, 833 S. Wood Street, Chicago, IL, United States
| | - Guido F Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, College of Pharmacy, 833 S. Wood Street, Chicago, IL, United States.
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Hajirahimkhan A, Dietz BM, Bolton JL. Botanical modulation of menopausal symptoms: mechanisms of action? PLANTA MEDICA 2013; 79:538-53. [PMID: 23408273 PMCID: PMC3800090 DOI: 10.1055/s-0032-1328187] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Menopausal women suffer from a variety of symptoms, including hot flashes and night sweats, which can affect quality of life. Although it has been the treatment of choice for relieving these symptoms, hormone therapy has been associated with increased breast cancer risk leading many women to search for natural, efficacious, and safe alternatives such as botanical supplements. Data from clinical trials suggesting that botanicals have efficacy for menopausal symptom relief have been controversial, and several mechanisms of action have been proposed including estrogenic, progestogenic, and serotonergic pathways. Plant extracts with potential estrogenic activities include soy, red clover, kudzu, hops, licorice, rhubarb, yam, and chasteberry. Botanicals with reported progestogenic activities are red clover, hops, yam, and chasteberry. Serotonergic mechanisms have also been proposed since women taking antidepressants often report a reduction in hot flashes and night sweats. Black cohosh, kudzu, kava, licorice, and dong quai all either have reported 5-hydroxytryptamine receptor 7 ligands or inhibit serotonin reuptake, therefore have potential serotonergic activities. Understanding the mechanisms of action of these natural remedies used for women's health could lead to more efficacious formulations and to the isolation of active components which have the potential of becoming effective medications in the future.
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Affiliation(s)
| | | | - Judy L. Bolton
- Correspondence. Prof. Dr. Judy Bolton, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood St., M/C 781, Chicago, IL., 60612-7231, USA. Phone: +1 312-996-5280 Fax: +1 312-996-7107
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19
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Napolitano JG, Lankin DC, Graf TN, Friesen JB, Chen SN, McAlpine JB, Oberlies NH, Pauli GF. HiFSA fingerprinting applied to isomers with near-identical NMR spectra: the silybin/isosilybin case. J Org Chem 2013; 78:2827-39. [PMID: 23461697 PMCID: PMC3640553 DOI: 10.1021/jo302720h] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study demonstrates how regio- and diastereo-isomers with near-identical NMR spectra can be distinguished and unambiguously assigned using quantum mechanical driven (1)H iterative Full Spin Analysis (HiFSA). The method is illustrated with four natural products, the flavonolignans silybin A, silybin B, isosilybin A, and isosilybin B, which exhibit extremely similar coupling patterns and chemical shift differences well below the commonly reported level of accuracy of 0.01 ppm. The HiFSA approach generated highly reproducible (1)H NMR fingerprints that enable distinction of all four isomers at (1)H frequencies from 300 to 900 MHz. Furthermore, it is demonstrated that the underlying numeric (1)H NMR profiles, combined with iterative computational analysis, allow parallel quantification of all four isomers, even in difficult to characterize reference materials and mixtures. The results shed new light on the historical challenges to the qualitative and quantitative analysis of these therapeutically relevant flavonolignans and open new opportunities to explore hidden diversity in the chemical space of organic molecules.
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Affiliation(s)
- José G. Napolitano
- Department of Medicinal Chemistry & Pharmacognosy, and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - David C. Lankin
- Department of Medicinal Chemistry & Pharmacognosy, and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Tyler N. Graf
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - J. Brent Friesen
- Department of Medicinal Chemistry & Pharmacognosy, and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
- Rosary College of Arts and Sciences, Dominican University, River Forest, IL 60305, United States
| | - Shao-Nong Chen
- Department of Medicinal Chemistry & Pharmacognosy, and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - James B. McAlpine
- Department of Medicinal Chemistry & Pharmacognosy, and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Nicholas H. Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Guido F. Pauli
- Department of Medicinal Chemistry & Pharmacognosy, and Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
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Dong SH, Nikolić D, Simmler C, Qiu F, van Breemen RB, Soejarto DD, Pauli GF, Chen SN. Diarylheptanoids from Dioscorea villosa (Wild Yam). JOURNAL OF NATURAL PRODUCTS 2012; 75:2168-77. [PMID: 23245349 PMCID: PMC3710746 DOI: 10.1021/np300603z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A fractionation methodology aimed at the metabolomic mining of new phytoconstituents for the widely used botanical, wild yam (Dioscorea villosa), makes use of 1D qHNMR and 2D NMR profiles along the preparative fractionation pathway. This quantifiable and structural guidance led to the isolation of 14 diarylheptanoids (1-14), including five new compounds (1-5) with a tetrahydropyrano core skeleton. The structures, including the absolute configurations of both new and previously known diarylheptanoids, were assigned by a combination of HRESIMS, 1D and 2D NMR, (1)H iterative full spin analysis (HiFSA), and Mosher's ester method. The isolation yields were consistent with yields predicted by qHNMR, which confirms the (semi)quantifiable capabilities of NMR-based preparative metabolomic mining. The qHNMR-aided approach enabled the identification of new and potentially significant chemical entities from a small fraction of the plant extract and, thereby, facilitated the characterization of the residual complexity of the D. villosa secondary metabolome. LC-MS profiling of different D. villosa accessions further confirmed that the diarylheptanoids represent genuine secondary metabolites, which can serve as a new class of markers for botanical integrity analysis of D. villosa.
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Affiliation(s)
- Shi-Hui Dong
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Dejan Nikolić
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Charlotte Simmler
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Feng Qiu
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Richard B. van Breemen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Djaja D. Soejarto
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Guido F. Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
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Riihinen KR, Gödecke T, Pauli GF. Purification of berry flavonol glycosides by long-bed gel permeation chromatography. J Chromatogr A 2012; 1244:20-7. [PMID: 22609168 DOI: 10.1016/j.chroma.2012.04.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 04/10/2012] [Accepted: 04/23/2012] [Indexed: 10/28/2022]
Abstract
While Sephadex LH-20 gel is frequently employed as a stationary phase during pre-separations and in open column chromatography systems, its separation power in long-bed gel permeation chromatography (GPC) applications is much less prevalent. Aimed at the characterization of bioactive constituents, a long-bed GPC protocol was established for lingonberry juice concentrate. The method included pre-fractionation over HP-20 resin to eliminate sugars and organic acids as well as a major part of other predominant berry flavonoids (anthocyanins, flavan-3-ols and proanthocyanidins), prior to the elution of the fraction containing 10% (w/w) of quercetin glycosides (QGs). Subsequently, seven major QGs were purified using a 10-m Sephadex LH-20 system and isocratic elution with methanol. The total mass recovery was 99.3±1.4%, after eluting the highly-retained compounds from the employed pre-column with 70% acetone. Injecting 1070 mg per run, the yield of purified QGs ranged from 2 to 6 mg per collected single fraction. The LC-UV/PDA purities of isolated Q-3-O-α-rhamnoside and Q-3-O-β-galactoside were 82 and 94 area% at 250 nm, while the three Q-pentosides showed purities of 59, 30, and 57 area%. By comparison, purity assessment of these isolates by quantitative ¹H NMR (total integral and modified 100% method) led to significantly lower purities of 70 and 52% for Q-rha and Q-gal and 38, 25 and 46% for Q-pentosides, respectively. This can be explained by the presence of hidden residual complexity (RC), which is revealed by the quantitative NMR method. This finding has potentially broader implication as it reveals an unexpected degree of RC in GPC fractions. Despite remarkable separation power for congeneric flavonoids, long-bed GPC on Sephadex LH-20 produces materials, which require careful analysis of purity before interpreting bioassay results.
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Affiliation(s)
- Kaisu R Riihinen
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612-7231, USA.
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Pauli GF, Gödecke T, Jaki BU, Lankin DC. Quantitative 1H NMR. Development and potential of an analytical method: an update. JOURNAL OF NATURAL PRODUCTS 2012; 75:834-51. [PMID: 22482996 PMCID: PMC3384681 DOI: 10.1021/np200993k] [Citation(s) in RCA: 237] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Covering the literature from mid-2004 until the end of 2011, this review continues a previous literature overview on quantitative (1)H NMR (qHNMR) methodology and its applications in the analysis of natural products. Among the foremost advantages of qHNMR is its accurate function with external calibration, the lack of any requirement for identical reference materials, a high precision and accuracy when properly validated, and an ability to quantitate multiple analytes simultaneously. As a result of the inclusion of over 170 new references, this updated review summarizes a wealth of detailed experiential evidence and newly developed methodology that supports qHNMR as a valuable and unbiased analytical tool for natural product and other areas of research.
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Affiliation(s)
- Guido F Pauli
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA.
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