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Geum NG, Son HJ, Yu JH, Yeo JH, Choi MY, Lee JW, Baek JK, Eo HJ, Park GH, Jeong JB. Kadsura japonica fruits exert immunostimulatory and anti-obesity activity in RAW264.7 and 3T3-L1 cells. FOOD AGR IMMUNOL 2022. [DOI: 10.1080/09540105.2021.2024151] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Na Gyeong Geum
- Forest Medicinal Resources Research Center, National Institute of Forest Science, Yeongju, Republic of Korea
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
| | - Ho Jun Son
- National Institute of Forest Science, Seoul, Republic of Korea
| | - Ju Hyung Yu
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
| | - Joo Ho Yeo
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
| | - Min Yeong Choi
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
| | - Jae Won Lee
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
| | - Jueng Kyu Baek
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
| | - Hyun Ji Eo
- Special Forest Resources Division, National Institute of Forest Science, Suwon, Republic of Korea
| | - Gwang Hun Park
- Forest Medicinal Resources Research Center, National Institute of Forest Science, Yeongju, Republic of Korea
| | - Jin Boo Jeong
- Department of Medicinal Plant Resources, Andong National University, Andong, Republic of Korea
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Xu JB, Gao GC, Yuan MJ, Huang X, Zhou HY, Zhang Y, Zheng YX, Wu Z, Feng JM, Wu JM. Lignans from Schisandra chinensis ameliorate alcohol and CCl 4-induced long-term liver injury and reduce hepatocellular degeneration via blocking ETBR. JOURNAL OF ETHNOPHARMACOLOGY 2020; 258:112813. [PMID: 32259665 DOI: 10.1016/j.jep.2020.112813] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Chemical hepatotoxicity, especially alcoholic liver injury (ALI), commonly occurs in young and middle-aged people who drink heavily. ALI is extremely harmful and can induce severe disease states, such as hepatitis, liver fibrosis, cirrhosis, or liver cancer, which are similar to CCl4-induced liver disease states in animals. In recent studies, the pathological changes of hepatocytes and the hepatic stellate cell have shown a significant connection between endoplasmic reticulum (ER) stress and the development of liver pathology in patients. However, the detailed pathological mechanism needs to be further studied. Schisandra chinensis, (S. chinensis), a fruit-bearing vine used in Traditional Chinese Medicine (TCM), has been used to treat chronic or acute diseases, including liver disease. S. chinensis-derived lignans (SCDLs) in particular have been shown to alleviate liver pathological changes. AIM OF THE STUDY This study sought to elucidate the mechanisms underlying SCDL-mediated hepatoprotection. MATERIALS AND METHODS We first used in silico target prediction and computational simulation methods to identify putative lignan-binding targets relative to the hepatoprotective effect. A gene microarray analysis was performed to identify differently expressed genes that might have significance in the disease pathological process. We then used histological analyses in a mice hepatotoxicity model to test the effectiveness of SCDLs in vivo, and a hepatocellular toxicity model to analyze the candidate-compound-mediated hepatoprotection and expression states of the key targets in vitro. RESULTS The in silico analysis results indicated that endothelin receptor B (ETBR/EDNRB) is likely a significant node during the liver pathological change process and a promising key target for the SCDL compound schisantherin D on the hepatoprotective effect; experimental studies showed that schisantherin D alleviated the EtOH- and ET-1-induced HL-7702 cell (belongs to liver parenchymal cell lines) injury ratio, decreased the expression of ETBR, and inhibited ECMs and ET-1 secretion in LX-2 cells (one form of hepatic stellate cells). SCDLs ameliorated EtOH- and CCl4-induced fibrosis formation in mice liver tissue. Liver tissue western blots of SCDL-treated mice showed downregulated α-SMA, ETBR, PLCβ, CHOP, Bax, and the apoptotic factors of cleaved-caspase 12, cleaved-caspase 9, and cleaved-caspase 3 hinted at an anti-apoptosis and hepatoprotective effect. The SCDL treatment also elevated serum glutathione (GSH) and reduced the serum-transforming growth factor-β1 (TGF-β1) level. CONCLUSION The findings indicated that SCDLs prevent hepatotoxicity via their anti-fibrotic, anti-oxidant, and anti-apoptosis properties. ETBR may be the key factor in promoting chemical hepatotoxicity.
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Affiliation(s)
- Jin-Biao Xu
- Department of Pharmacy, College of Medicine, Jiaxing University, Jiaxing, 314001, China
| | - Guang-Chun Gao
- Department of Pharmacy, College of Medicine, Jiaxing University, Jiaxing, 314001, China
| | - Ming-Jing Yuan
- Department of Pharmacy, College of Medicine, Jiaxing University, Jiaxing, 314001, China
| | - Xuan Huang
- Department of Pharmacy, College of Medicine, Jiaxing University, Jiaxing, 314001, China
| | - Hong-Yu Zhou
- Department of Pharmacy, College of Medicine, Jiaxing University, Jiaxing, 314001, China
| | - Yang Zhang
- School of Biology and Food Engineering, Changshu Institute of Technology, Changshu, 215500, China
| | - Ya-Xin Zheng
- School of Pharmacy, Key Laboratory of Sichuan Province for Specific Structure of Small Molecule Drugs, Chengdu Medical College, Chengdu, 610500, China
| | - Zhe Wu
- School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, China
| | - Jun-Miao Feng
- School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, China
| | - Ji-Ming Wu
- Department of Pharmacy, College of Medicine, Jiaxing University, Jiaxing, 314001, China.
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New seco-dibenzocyclooctadiene lignans with nitric oxide production inhibitory activity from the roots of Kadsura longipedunculata. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Çiçek SS. Structure-Dependent Activity of Natural GABA(A) Receptor Modulators. Molecules 2018; 23:molecules23071512. [PMID: 29932138 PMCID: PMC6100244 DOI: 10.3390/molecules23071512] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 12/22/2022] Open
Abstract
GABA(A) receptors are ligand-gated ion channels consisting of five subunits from eight subfamilies, each assembled in four hydrophobic transmembrane domains. This pentameric structure not only allows different receptor binding sites, but also various types of ligands, such as orthosteric agonists and antagonists, positive and negative allosteric modulators, as well as second-order modulators and non-competitive channel blockers. A fact, that is also displayed by the variety of chemical structures found for both, synthetic as well as nature-derived GABA(A)-receptor modulators. This review covers the literature for natural GABA(A)-receptor modulators until the end of 2017 and discusses their structure-activity relationship.
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Affiliation(s)
- Serhat Sezai Çiçek
- Department of Pharmaceutical Biology, Kiel University, Gutenbergstraße 76, 24118 Kiel, Germany.
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Li Z, He X, Liu F, Wang J, Feng J. A review of polysaccharides from Schisandra chinensis and Schisandra sphenanthera: Properties, functions and applications. Carbohydr Polym 2018; 184:178-190. [DOI: 10.1016/j.carbpol.2017.12.058] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 12/03/2017] [Accepted: 12/20/2017] [Indexed: 12/17/2022]
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Moradi-Afrapoli F, Ebrahimi SN, Smiesko M, Hamburger M. HPLC-Based Activity Profiling for GABA A Receptor Modulators in Extracts: Validation of an Approach Utilizing a Larval Zebrafish Locomotor Assay. JOURNAL OF NATURAL PRODUCTS 2017; 80:1548-1557. [PMID: 28485933 DOI: 10.1021/acs.jnatprod.7b00081] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gamma-aminobutyric acid type A (GABAA) receptors are major inhibitory neurotransmitter receptors in the central nervous system and a target for numerous clinically important drugs used to treat anxiety, insomnia, and epilepsy. A series of allosteric GABAA receptor agonists was identified previously with the aid of HPLC-based activity profiling, whereby activity was tracked with an electrophysiological assay in Xenopus laevis oocytes. To accelerate the discovery process, an approach has been established for HPLC-based profiling using a larval zebrafish (Danio rerio) seizure model induced by pentylenetetrazol (PTZ), a pro-convulsant GABAA receptor antagonist. The assay was validated with the aid of representative GABAergic plant compounds and extracts. Various parameters that are relevant for the quality of results obtained, including PTZ concentration, the number of larvae, the incubation time, and the data analysis protocol, were optimized. The assay was then translated into an HPLC profiling protocol, and active compounds were tracked in extracts of Valeriana officinalis and Magnolia officinalis. For selected compounds the effects in the zebrafish larvae model were compared with data from in silico blood-brain barrier (BBB) permeability predictions, to validate the use for discovery of BBB-permeable natural products.
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Affiliation(s)
| | - Samad Nejad Ebrahimi
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University , G. C., Evin, Tehran, Iran
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Cen Y, Xiao A, Chen X, Liu L. Isolation of α-Amylase Inhibitors from Kadsura longipedunculata Using a High-Speed Counter-Current Chromatography Target Guided by Centrifugal Ultrafiltration with LC-MS. Molecules 2016; 21:molecules21091190. [PMID: 27617987 PMCID: PMC6274455 DOI: 10.3390/molecules21091190] [Citation(s) in RCA: 12] [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: 08/09/2016] [Revised: 09/05/2016] [Accepted: 09/05/2016] [Indexed: 01/06/2023] Open
Abstract
In this study, a high-speed counter-current chromatography (HSCCC) separation method target guided by centrifugal ultrafiltration with high-performance liquid chromatography-mass spectrometry (CU-LC-MS) was proposed. This method was used to analyze α-amylase inhibitors from Kadsura longipedunculata extract. According to previous screening with CU-LC-MS, two screened potential α-amylase inhibitors was successfully isolated from Kadsura longipedunculata extract using HSCCC under the optimized experimental conditions. The isolated two target compounds (with purities of 92.3% and 94.6%) were, respectively, identified as quercetin-3-O-rhamnoside (1) and protocatechuic acid (2) based on the MS, UV, and ¹H-NMR spectrometry data. To verify the inhibition of screened compounds, the inhibitory activities of quercetin-3-O-rhamnoside (1) and protocatechuic acid (2) on α-amylase were tested, and it demonstrated that the experimental IC50 values of quercetin-3-O-rhamnoside (1) and protocatechuic acid (2) were 28.8 and 12.5 μmol/L. These results proved that the hyphenated technique using CU-LC-MS and HSCCC was a rapid, competent, and reproductive method to screen and separate potential active compounds, like enzyme inhibitors from the extract of herbal medicines.
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Affiliation(s)
- Yin Cen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China.
| | - Aiping Xiao
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, Hunan, China.
| | - Xiaoqing Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China.
| | - Liangliang Liu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, Hunan, China.
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Tran TD, Pham NB, Booth R, Forster PI, Quinn RJ. Lignans from the Australian Endemic Plant Austrobaileya scandens. JOURNAL OF NATURAL PRODUCTS 2016; 79:1514-1523. [PMID: 27214307 DOI: 10.1021/acs.jnatprod.5b00988] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The sole species of the vascular plant family Austrobaileyaceae, Austrobaileya scandens, is endemic to the tropical rainforest of northeastern Queensland, Australia. A single lead-like enhanced fraction of A. scandens showed potent inhibition against human prostate cancer PC3 cells. Chemical investigation of this plant resulted in the isolation of two new aryltetralin lignans, austrobailignans 8 and 9 (1 and 2), and the synthetic compound nicotlactone B (3), newly identified as a natural product together with nine known lignans (4-12). Their structures were established on the basis of spectroscopic analyses. Absolute configurations of the new compounds were determined by quantum chemical electronic circular dichroism (ECD) calculations employing time-dependent density functional theory. The ECD calculations were also used to assign the absolute configuration of marphenol K (4) and revise the absolute configuration of kadsurindutin C (20). Ten out of the 12 isolated compounds inhibited the growth of PC3 cells with IC50 values ranging from micromolar to nanomolar. Marphenol A (5) was found for the first time to induce apoptosis and arrest the S cell cycle phase of PC3 cells.
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Affiliation(s)
- Trong D Tran
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, Queensland 4111, Australia
| | - Ngoc B Pham
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, Queensland 4111, Australia
| | - Ron Booth
- Queensland Herbarium, DSITI, Brisbane Botanic Gardens , Mt. Coot-tha Road, Brisbane, Queensland 4066, Australia
| | - Paul I Forster
- Queensland Herbarium, DSITI, Brisbane Botanic Gardens , Mt. Coot-tha Road, Brisbane, Queensland 4066, Australia
| | - Ronald J Quinn
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, Queensland 4111, Australia
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Zheng Y, Wu J, Feng X, Jia Y, Huang J, Hao Z, Zhao S, Wang J. In silico Analysis and Experimental Validation of Lignan Extracts from Kadsura longipedunculata for Potential 5-HT1AR Agonists. PLoS One 2015; 10:e0130055. [PMID: 26076134 PMCID: PMC4468062 DOI: 10.1371/journal.pone.0130055] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 05/15/2015] [Indexed: 12/03/2022] Open
Abstract
Objectives Kadsura longipedunculata (KL) has been widely used for the treatment of insomnia in traditional Chinese medicine. The aim of this study was to explore the mechanism of the sedative and hypnotic effects of KL. Materials and Methods The content of KL was evaluated by HPLC-TOF-MS, and a potential target was found and used to construct its 3D structure to screen for potential ligands among the compounds in KL by using bioinformatics analysis, including similarity ensemble approach (SEA) docking, homology modeling, molecular docking and ligand-based pharmacophore. The PCPA-induced insomnia rat model was then applied to confirm the potential targets related to the sedative effects of KL by performing the forced swimming test (FST), the tail suspension test (TST) and the measurement of target-related proteins using western blotting and immunofluorescence. Results Bioinformatics analysis showed that most of lignan compounds in KL were optimal ligands for the 5-HT1A receptor (5-HT1AR), and they were found to be potential targets related to sedative effects; the main lignan content of KL extracts was characterized by HPLC-TOF-MS, with 7 proposed lignans detected. Administration of KL could significantly reduce FST and TST immobility time in the PCPA-induced 5HT-depleted insomnia rat model. The expressions of proteins related to the 5-HT1AR pathway were regulated by extracts of KL in a concentration-dependent manner, indicating that extracts of KL had 5-HT1AR agonist-like effects. Conclusion In silico analysis and experimental validation together demonstrated that lignan extracts from KL can target 5-HT1AR in insomniac rats, which could shed light on its use as a potential 5-HT1AR agonist drug.
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Affiliation(s)
- Yaxin Zheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jiming Wu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Xuesong Feng
- School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Ying Jia
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jian Huang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Zhihui Hao
- Animal Center, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Songyan Zhao
- School of Life Science, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jinhui Wang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
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Rueda DC, Raith M, De Mieri M, Schöffmann A, Hering S, Hamburger M. Identification of dehydroabietc acid from Boswellia thurifera resin as a positive GABAA receptor modulator. Fitoterapia 2014; 99:28-34. [DOI: 10.1016/j.fitote.2014.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/27/2014] [Accepted: 09/01/2014] [Indexed: 10/24/2022]
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Ebrahimi SN, Farimani MM, Mirzania F, Soltanipoor MA, De Mieri M, Hamburger M. Manoyloxide Sesterterpenoids from Salvia mirzayanii. JOURNAL OF NATURAL PRODUCTS 2014; 77:848-854. [PMID: 24689905 DOI: 10.1021/np400948n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Five new manoyloxide-type sesterterpenes were isolated from aerial parts of Salvia mirzayanii, a species endemic to Iran. The planar structures were established by means of 1D and 2D NMR and HRESIMS. Compounds 1-3 differed only in their configurations at C-13 and C-14. Assignment of relative and absolute configurations was achieved by NOESY experiments and by comparison of experimental and simulated ECD spectra of possible stereoisomers. The absolute configurations of 4 and 5 were established in a similar manner.
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Affiliation(s)
- Samad N Ebrahimi
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University , G. C., Evin, Tehran, Iran
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12
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Rueda DC, De Mieri M, Hering S, Hamburger M. HPLC-based activity profiling for GABAA receptor modulators in Adenocarpus cincinnatus. JOURNAL OF NATURAL PRODUCTS 2014; 77:640-649. [PMID: 24571311 DOI: 10.1021/np500016z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In a two-microelectrode voltage clamp assay with Xenopus laevis oocytes, a dichloromethane extract of Adenocarpus cincinnatus roots and tubers (Leguminosae) enhanced the GABA-induced chloride current (IGABA) through receptors of the subtype α1β2γ2s by 126.5 ± 25.1% when tested at 100 μg/mL. By means of HPLC-based activity profiling, 15 flavonoid and isoflavonoid derivatives, including eight new compounds, were identified in the active fractions of the extract. Isoflavone 11 and pterocarpans 2 and 8 showed promising activity in the oocyte assay, with EC50 values between 2.8 ± 1.4 and 18.8 ± 2.3 μM. Maximal potentiation of IGABA ranged between 490% and 640%. This is the first report of pterocarpans as GABAA receptor modulators.
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Affiliation(s)
- Diana C Rueda
- Division of Pharmaceutical Biology, University of Basel , Klingelbergstrasse 50, 4056 Basel, Switzerland
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Rueda DC, Schöffmann A, De Mieri M, Raith M, Jähne EA, Hering S, Hamburger M. Identification of dihydrostilbenes in Pholidota chinensis as a new scaffold for GABAA receptor modulators. Bioorg Med Chem 2014; 22:1276-84. [DOI: 10.1016/j.bmc.2014.01.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 12/20/2013] [Accepted: 01/03/2014] [Indexed: 10/25/2022]
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Schramm A, Ebrahimi SN, Raith M, Zaugg J, Rueda DC, Hering S, Hamburger M. Phytochemical profiling of Curcuma kwangsiensis rhizome extract, and identification of labdane diterpenoids as positive GABAA receptor modulators. PHYTOCHEMISTRY 2013; 96:318-329. [PMID: 24011802 DOI: 10.1016/j.phytochem.2013.08.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 07/29/2013] [Accepted: 08/09/2013] [Indexed: 06/02/2023]
Abstract
An ethyl acetate extract of Curcuma kwangsiensis S.G. Lee & C.F. Liang (Zingiberaceae) rhizomes (100 μg/ml) enhanced the GABA-induced chloride current (IGABA) through GABAA receptors of the α1β2γ2S subtype by 79.0±7.0%. Potentiation of IGABA was measured using the two-microelectrode voltage-clamp technique and Xenopus laevis oocytes. HPLC-based activity profiling of the crude extract led to the identification of 11 structurally related labdane diterpenoids, including four new compounds. Structure elucidation was achieved by comprehensive analysis of on-line (LC-PDA-ESI-TOF-MS) and off-line (microprobe 1D and 2D NMR) spectroscopic data. The absolute configuration of the compounds was established by comparison of experimental and calculated ECD spectra. Labdane diterpenes represent a new class of plant secondary metabolites eliciting positive GABAA receptor modulation. The highest efficiency was observed for zerumin A (maximum potentiation of IGABA by 309.4±35.6%, and EC50 of 24.9±8.8 μM).
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Affiliation(s)
- Anja Schramm
- Division of Pharmaceutical Biology, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
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Khom S, Strommer B, Schöffmann A, Hintersteiner J, Baburin I, Erker T, Schwarz T, Schwarzer C, Zaugg J, Hamburger M, Hering S. GABAA receptor modulation by piperine and a non-TRPV1 activating derivative. Biochem Pharmacol 2013; 85:1827-36. [PMID: 23623790 PMCID: PMC3776227 DOI: 10.1016/j.bcp.2013.04.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 04/15/2013] [Accepted: 04/17/2013] [Indexed: 01/11/2023]
Abstract
The action of piperine (the pungent component of pepper) and its derivative SCT-66 ((2E,4E)-5-(1,3-benzodioxol-5-yl))-N,N-diisobutyl-2,4-pentadienamide) on different gamma-aminobutyric acid (GABA) type A (GABAA) receptors, transient-receptor-potential-vanilloid-1 (TRPV1) receptors and behavioural effects were investigated. GABAA receptor subtypes and TRPV1 receptors were expressed in Xenopus laevis oocytes. Modulation of GABA-induced chloride currents (IGABA) by piperine and SCT-66 and activation of TRPV1 was studied using the two-microelectrode-voltage-clamp technique and fast perfusion. Their effects on explorative behaviour, thermoregulation and seizure threshold were analysed in mice. Piperine acted with similar potency on all GABAA receptor subtypes (EC50 range: 42.8 ± 7.6 μM (α2β2)–59.6 ± 12.3 μM (α3β2)). IGABA modulation by piperine did not require the presence of a γ2S-subunit, suggesting a binding site involving only α and β subunits. IGABA activation was slightly more efficacious on receptors formed from β2/3 subunits (maximal IGABA stimulation through α1β3 receptors: 332 ± 64% and α1β2: 271 ± 36% vs. α1β1: 171 ± 22%, p < 0.05) and α3-subunits (α3β2: 375 ± 51% vs. α5β2:136 ± 22%, p < 0.05). Replacing the piperidine ring by a N,N-diisobutyl residue (SCT-66) prevents interactions with TRPV1 and simultaneously increases the potency and efficiency of GABAA receptor modulation. SCT-66 displayed greater efficacy on GABAA receptors than piperine, with different subunit-dependence. Both compounds induced anxiolytic, anticonvulsant effects and reduced locomotor activity; however, SCT-66 induced stronger anxiolysis without decreasing body temperature and without the proconvulsive effects of TRPV1 activation and thus may serve as a scaffold for the development of novel GABAA receptor modulators.
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Affiliation(s)
- Sophia Khom
- Department of Pharmacology and Toxicology, University of Vienna, Althanstraße 14, A-1090 Wien, Austria
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Potterat O, Hamburger M. Concepts and technologies for tracking bioactive compounds in natural product extracts: generation of libraries, and hyphenation of analytical processes with bioassays. Nat Prod Rep 2013; 30:546-64. [DOI: 10.1039/c3np20094a] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Adams M, Schneider SV, Kluge M, Kessler M, Hamburger M. Epilepsy in the Renaissance: a survey of remedies from 16th and 17th century German herbals. JOURNAL OF ETHNOPHARMACOLOGY 2012; 143:1-13. [PMID: 22710294 DOI: 10.1016/j.jep.2012.06.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 06/07/2012] [Accepted: 06/07/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Before modern anticonvulsive drugs were developed people in central Europe used herbal remedies to treat epilepsy. Hundreds of different plants for this indication can be found in German herbals of the 16th and 17th centuries. Here we compile these plants and discuss their use from a pharmacological perspective. MATERIALS AND METHODS Nine of the most important European herbals of the 16th and 17th century including Bock (1577), Fuchs (1543), Mattioli (1590), Lonicerus (1660, 1770), Brunfels (1532), Zwinger (1696), and Tabernaemontanus (1591, 1678) were searched for terms related to epilepsy, and plants and recipes described for its treatment were documented. We then searched scientific literature for pharmacological evidence of their effectiveness. Additionally the overlapping of these remedies with those in De Materia Medica by the Greek physician Dioscorides was studied. RESULTS Two hundred twenty one plants were identified in the herbals to be used in the context of epilepsy. In vitro and/or in vivo pharmacological data somehow related to the indication epilepsy was found for less than 5% of these plants. Less than 7% of epilepsy remedies are in common with De Materia Medica. CONCLUSIONS Numerous plants were used to treat epilepsy in the 16th and 17th centuries. However, few of these plants have been investigated with respect to pharmacological activity on epilepsy related targets.
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Affiliation(s)
- Michael Adams
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Biology, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland.
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Dastan D, Salehi P, Reza Gohari A, Zimmermann S, Kaiser M, Hamburger M, Reza Khavasi H, Ebrahimi SN. Disesquiterpene and sesquiterpene coumarins from Ferula pseudalliacea, and determination of their absolute configurations. PHYTOCHEMISTRY 2012; 78:170-178. [PMID: 22440297 DOI: 10.1016/j.phytochem.2012.02.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 01/30/2012] [Accepted: 02/21/2012] [Indexed: 05/31/2023]
Abstract
The first disesquiterpene coumarin, sanandajin, five sesquiterpene coumarins, kamolonol acetate, fekrynol acetate, ethyl galbanate, methyl galbanate, farnesiferol B, and a sesquiterpene, aristolone, were isolated from a n-hexane extract of Ferula pseudalliacea roots. The structures were elucidated by 1D and 2D NMR, HR-ESIMS data, and kamolonol acetate was confirmed by single-crystal X-ray analysis. The absolute configuration of compounds was established by comparison of experimental and simulated ECD spectra using time dependence density function theory (TDDFT). In vitro antiplasmodial activity against Plasmodium falciparum K1 strain was determined. sanandajin, kamolonol acetate and methyl galbanate showed moderate antiplasmodial activity, with IC(50) values of 2.6, 16.1 and 7.1 μM, respectively.
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Affiliation(s)
- Dara Dastan
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G. C., Evin, Tehran, Iran
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