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El Mahdi O, Ouakil A, Lachkar M. Non-volatile constituents from Monimiaceae, Siparunaceae and Atherospermataceae plant species and their bioactivities: An up-date covering 2000-2021. PHYTOCHEMISTRY 2022; 202:113291. [PMID: 35787353 DOI: 10.1016/j.phytochem.2022.113291] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/27/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
The Monimiaceae, Siparunaceae, and Atherospermataceae, formerly included in the broad ''old'' Monimiaceae family, have long been known for their uses in traditional medicine and have proven to be rich sources of chemically diverse specialized metabolites with numerous potent biological and therapeutical properties. The progress made recently has expanded their phytochemistry and pharmacology albeit to different extents. This review focuses on the non-volatile constituents isolated from the three plant families during the last two decades and their emerging therapeutic potential. Based on the data collected from multiple databases without statistical analysis, approximately 93 components, of which 35 undescribed compounds including γ-lactones, alkaloids, terpenoids, flavonoids, and homogentisic acid derivatives, have been reported. Moreover, diverse biological activities of pure isolated compounds such as anticancer, antioxidant, antiparasitic, antiviral, and antibacterial activities have been evidenced. Besides offering new important perspectives for different diseases' management, the chemical and biological diversities among the isolated compounds, open promising avenues of research and contribute to renewed interest in these families needing further studies. This review provides an updated overview of their potential as sources of leads for drug discovery, while also highlighting ongoing challenges and future research opportunities.
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Affiliation(s)
- Ouafâa El Mahdi
- Laboratory of Natural Ressources and Environment, Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University, B.P. 1223, Taza Gare, Morocco.
| | - Abdelmoughite Ouakil
- Faculty of Sciences Dhar Lmehraz, Sidi Mohamed Ben Abdellah University, 30000, Fez, Morocco
| | - Mohammed Lachkar
- Faculty of Sciences Dhar Lmehraz, Sidi Mohamed Ben Abdellah University, 30000, Fez, Morocco
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Tsai SC, Wu WC, Yang JS. Tetrandrine Inhibits Epithelial-Mesenchymal Transition in IL-6-Induced HCT116 Human Colorectal Cancer Cells. Onco Targets Ther 2021; 14:4523-4536. [PMID: 34456573 PMCID: PMC8387317 DOI: 10.2147/ott.s324552] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 08/01/2021] [Indexed: 12/12/2022] Open
Abstract
Introduction Patients with colorectal cancer (CRC) often develop distant metastases, which significantly reduces the 5-year survival rate. Epithelial-mesenchymal transition (EMT) is a crucial process for the invasion and metastasis of cancer cells. Tetrandrine has been reported to inhibit the viability and EMT of CRC cells; however, to the best of our knowledge, the molecular mechanism remains undetermined. Methods The MTT assay was used to determine HCT116 cell viability. Wound healing and Transwell assays were used to determine that cell migration and invasion, respectively. Western blotting analysis was performed to detect the expression of migration-related genes. Four different lengths of the E-cadherin gene promoter were constructed and cloned into pGL3 reporter plasmids to evaluate E-cadherin gene promoter activity. Results The results of the MTT assay revealed that tetrandrine inhibited HCT116 cell viability, with an IC50 value of 7.2 μM following 24 h of treatment. Tetrandrine inhibited IL-6-induced cell migration and invasion, respectively. Tetrandrine regulates the expression of migration-related genes in IL-6-stimulated HCT116 cells. Tetrandrine significantly downregulated the expression and enzyme activity of MMP-2 in IL-6-stimulated HCT116 cells. In addition, tetrandrine restored E-cadherin gene promoter activity. Conclusion The findings of the present study suggested that tetrandrine may inhibit EMT in IL-6-stimulated HCT116 cells; therefore, it may represent a potential drug for CRC.
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Affiliation(s)
- Shih-Chang Tsai
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, Republic of China
| | - Wei-Chei Wu
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, Republic of China
| | - Jai-Sing Yang
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan, Republic of China
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Müller M, Gerndt S, Chao YK, Zisis T, Nguyen ONP, Gerwien A, Urban N, Müller C, Gegenfurtner FA, Geisslinger F, Ortler C, Chen CC, Zahler S, Biel M, Schaefer M, Grimm C, Bracher F, Vollmar AM, Bartel K. Gene editing and synthetically accessible inhibitors reveal role for TPC2 in HCC cell proliferation and tumor growth. Cell Chem Biol 2021; 28:1119-1131.e27. [PMID: 33626324 DOI: 10.1016/j.chembiol.2021.01.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 01/08/2021] [Accepted: 01/28/2021] [Indexed: 01/02/2023]
Abstract
The role of two-pore channel 2 (TPC2), one of the few cation channels localized on endolysosomal membranes, in cancer remains poorly understood. Here, we report that TPC2 knockout reduces proliferation of cancer cells in vitro, affects their energy metabolism, and successfully abrogates tumor growth in vivo. Concurrently, we have developed simplified analogs of the alkaloid tetrandrine as potent TPC2 inhibitors by screening a library of synthesized benzyltetrahydroisoquinoline derivatives. Removal of dispensable substructures of the lead molecule tetrandrine increases antiproliferative properties against cancer cells and impairs proangiogenic signaling of endothelial cells to a greater extent than tetrandrine. Simultaneously, toxic effects on non-cancerous cells are reduced, allowing in vivo administration and revealing a TPC2 inhibitor with antitumor efficacy in mice. Hence, our study unveils TPC2 as valid target for cancer therapy and provides easily accessible tetrandrine analogs as a promising option for effective pharmacological interference.
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Affiliation(s)
- Martin Müller
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Susanne Gerndt
- Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Yu-Kai Chao
- Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Themistoklis Zisis
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Ong Nam Phuong Nguyen
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Aaron Gerwien
- Department of Chemistry and Munich Center for Integrated Protein Science (CIPSM), Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Nicole Urban
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Leipzig University, 04107 Leipzig, Germany
| | - Christoph Müller
- Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Florian A Gegenfurtner
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Franz Geisslinger
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Carina Ortler
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Cheng-Chang Chen
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, 100 Taipei, Taiwan
| | - Stefan Zahler
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Martin Biel
- Department of Pharmacy, Pharmacology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Michael Schaefer
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Leipzig University, 04107 Leipzig, Germany
| | - Christian Grimm
- Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University Munich, 80336 Munich, Germany.
| | - Franz Bracher
- Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-University Munich, 81377 Munich, Germany.
| | - Angelika M Vollmar
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany.
| | - Karin Bartel
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany.
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8-Oxo-9-Dihydromakomakine Isolated from Aristotelia chilensis Induces Vasodilation in Rat Aorta: Role of the Extracellular Calcium Influx. Molecules 2018; 23:molecules23113050. [PMID: 30469451 PMCID: PMC6278248 DOI: 10.3390/molecules23113050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 11/15/2018] [Accepted: 11/17/2018] [Indexed: 02/06/2023] Open
Abstract
8-Oxo-9-dihydromakomakine is a tetracyclic indole alkaloid extracted from leaves of the Chilean tree Aristotelia chilensis. The present study investigated the effects of this alkaloid on vascular response in tissues isolated from aortic segments obtained from normotensive rats. Our results showed that 8-oxo-9-dihydromakomakine induced a dose-dependent relaxation of aortic rings pre-contracted with phenylephrine (PE; 10−6 M). The vasorelaxation induced by 8-oxo-9-dihydromakomakine in rat aortic rings is independent of endothelium. The pre-incubation of aortic rings with 8-oxo-9-dehydromakomakine (10−4 M) significantly reduced the contractile response to KCl (p < 0.001) more than PE (p < 0.05). The highest dose of 8-oxo-9-dehydromakomakine (10−4 M) drastically reduced the contraction to KCl (6·10−2 M), but after that, PE (10−6 M) caused contraction (p < 0.05) in the same aortic rings. The addition of 8-oxo-9-dihydromakomakine (10−5 M) decreased the contractile response to tetraethylammonium (a voltage-dependent potassium channels blocker; TEA; 5 × 10−3 M; p < 0.01) and BaCl2 (a non-selective inward rectifier potassium channel blocker; 5 × 10−3 M; p < 0.001) in rat aorta. 8-oxo-9-dihydromakomakine (10−5 M) decreased the contractile response to PE in rat aorta in the presence or absence of ouabain (an inhibitor of Na,K-ATPase; 10−3 M; p < 0.05). These results could indicate that 8-oxo-9-dihydromakomakine partially reduces plasma membrane depolarization-induced contraction. In aortic rings depolarized by PE, 8-oxo-9-dihydromakomakine inhibited the contraction induced by the influx of extracellular Ca2+ in a Ca2+ free solution (p < 0.01). 8-oxo-9-dihydromakomakine reduced the contractile response to agonists of voltage-dependent calcium channels type L (Bay K6844; 10−8 M; p < 0.01), likely decreasing the influx of extracellular Ca2+ through the voltage-dependent calcium channels. This study provides the first qualitative analysis indicating that traditional folk medicine Aristotelia chilensis may be protective in the treatment of cardiovascular pathologies.
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Reyes-Parada M, Iturriaga-Vasquez P. The development of novel polypharmacological agents targeting the multiple binding sites of nicotinic acetylcholine receptors. Expert Opin Drug Discov 2016; 11:969-81. [DOI: 10.1080/17460441.2016.1227317] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Bai RR, Wu XM, Xu JY. Current natural products with antihypertensive activity. Chin J Nat Med 2016; 13:721-9. [PMID: 26481372 DOI: 10.1016/s1875-5364(15)30072-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 10/22/2022]
Abstract
Natural products have been an important source of new drugs, which also played a dominant role in the discovery and research of new drugs for the treatment of hypertension. This review article reviews the recent progress in the research and development of natural lead compounds with antihypertensive activity, including alkaloids, diterpenes, coumarins, flavonoids, and peptides. We summarized their structures, sources, as well as the antihypertensive mechanisms. These information provides instructive reference for the following structural modifications and optimization.
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Affiliation(s)
- Ren-Ren Bai
- School of Medicine, Emory University, Atlanta 30322, GA, USA; Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Xiao-Ming Wu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China.
| | - Jin-Yi Xu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China.
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Yang P, Lin H, Fei T, Liu F. Design and Synthesis of Novel Quinoline Tethered Tricyclic 1,5-Benzothiazepine Derivatives via 1,3-Dipolar Cycloaddition Reaction. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Peng Yang
- College of Materials and Chemical Engineering; Hangzhou Normal University; Zhejiang Hangzhou 310036 China
| | - Hui Lin
- College of Chemistry and Chemical Engineering; Xinjiang University; Xinjiang Urumqi 830046 China
| | - Tinghong Fei
- College of Materials and Chemical Engineering; Hangzhou Normal University; Zhejiang Hangzhou 310036 China
| | - Fangming Liu
- College of Materials and Chemical Engineering; Hangzhou Normal University; Zhejiang Hangzhou 310036 China
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Zhao H, Luo F, Li H, Zhang L, Yi Y, Wan J. Antinociceptive effect of tetrandrine on LPS-induced hyperalgesia via the inhibition of IKKβ phosphorylation and the COX-2/PGE₂ pathway in mice. PLoS One 2014; 9:e94586. [PMID: 24722146 PMCID: PMC3983227 DOI: 10.1371/journal.pone.0094586] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 03/17/2014] [Indexed: 11/19/2022] Open
Abstract
Tetrandrine (TET) is a bisbenzylisoquinoline alkaloid that is isolated from the Stephania Tetrandra. It is known to possess anti-inflammatory and immunomodulatory effects. We have shown that TET can effectively suppress the production of bacterial lipopolysaccharide (LPS)-induced inflammatory mediators, including cyclooxygenases (COXs), in macrophages. However, whether TET has an antinociceptive effect on LPS-induced hyperalgesia is unknown. In the present study, we investigated the potential antinociceptive effects of TET and the mechanisms by which it elicits its effects on LPS-induced hyperalgesia. LPS effectively evoked hyperalgesia and induced the production of PGE2 in the sera, brain tissues, and cultured astroglia. TET pretreatment attenuated all of these effects. LPS also activated inhibitor of κB (IκB) kinase β (IKKβ) and its downstream components in the IκB/nuclear factor (NF)-κB signaling pathway, including COX-2; the increase in expression levels of these components was significantly abolished by TET. Furthermore, in primary astroglia, knockdown of IKKβ, but not IKKα, reversed the effects of TET on the LPS-induced increase in IκB phosphorylation, P65 phosphorylation, and COX-2. Our results suggest that TET can effectively exert antinociceptive effects on LPS-induced hyperalgesia in mice by inhibiting IKKβ phosphorylation, which leads to the reduction in the production of important pain mediators, such as PGE2 and COX-2, via the IKKβ/IκB/NF-κB pathway.
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Affiliation(s)
- Hengguang Zhao
- Department of Dermatology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Fuling Luo
- Department of Pharmacy, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hongzhong Li
- Molecular oncology and epigenetics laboratory, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li Zhang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Yongfen Yi
- Department of Pathology, Molecular Medicine and Tumor Center, Chongqing Medical University, Chongqing, China
- * E-mail: (YFY); (JYW)
| | - Jingyuan Wan
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China
- * E-mail: (YFY); (JYW)
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Loghmani-Khouzani H, Tamjidi P, Mohammadpoor-Baltork I, Yaeghoobi M, Rahman NA, Khosropour AR, Moghadam M, Tangestaninejad S, Mirkhani V, Habibi MH, Kashima A, Suzuki T. Efficient and Eco-friendly Syntheses of 1,5-Benzothiazepines and 1,5-Benzodiazepines Catalyzed by [Hmim][NO3] under Mild Conditions. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1827] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Panteha Tamjidi
- Catalysis Division, Department of Chemistry; University of Isfahan; Isfahan 81746-73441 Iran
| | | | - Marzieh Yaeghoobi
- Department of Chemistry; University of Malaya; 50603 Kuala Lumpur Malaysia
| | | | - Ahmad Reza Khosropour
- Catalysis Division, Department of Chemistry; University of Isfahan; Isfahan 81746-73441 Iran
| | - Majid Moghadam
- Catalysis Division, Department of Chemistry; University of Isfahan; Isfahan 81746-73441 Iran
| | - Shahram Tangestaninejad
- Catalysis Division, Department of Chemistry; University of Isfahan; Isfahan 81746-73441 Iran
| | - Valiolah Mirkhani
- Catalysis Division, Department of Chemistry; University of Isfahan; Isfahan 81746-73441 Iran
| | - Mohammad Hossein Habibi
- Catalysis Division, Department of Chemistry; University of Isfahan; Isfahan 81746-73441 Iran
| | - Ayana Kashima
- Department of Chemistry, Faculty of Science; Okayama University; Tsushima-naka 3-1-1 Okayama 700-8530 Japan
| | - Takayoshi Suzuki
- Department of Chemistry, Faculty of Science; Okayama University; Tsushima-naka 3-1-1 Okayama 700-8530 Japan
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Jayendra, Kumar Y. New compound 6,7-dimethoxy-2-methylisoquinolinium from Indian medicinal plant Annona squamosa L. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.ijcas.2013.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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12
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Affiliation(s)
- Zhen Zhang
- Laboratory for Advanced Materials & Institute of Fine Chemicals, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, China
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Ansari FL, Iftikhar F, Ihsan-ul-Haq, Mirza B, Baseer M, Rashid U. Solid-phase synthesis and biological evaluation of a parallel library of 2,3-dihydro-1,5-benzothiazepines. Bioorg Med Chem 2008; 16:7691-7. [DOI: 10.1016/j.bmc.2008.07.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2008] [Revised: 07/02/2008] [Accepted: 07/03/2008] [Indexed: 11/29/2022]
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14
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Romanelli MN, Gratteri P, Guandalini L, Martini E, Bonaccini C, Gualtieri F. Central Nicotinic Receptors: Structure, Function, Ligands, and Therapeutic Potential. ChemMedChem 2007; 2:746-67. [PMID: 17295372 DOI: 10.1002/cmdc.200600207] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The growing interest in nicotinic receptors, because of their wide expression in neuronal and non-neuronal tissues and their involvement in several important CNS pathologies, has stimulated the synthesis of a high number of ligands able to modulate their function. These membrane proteins appear to be highly heterogeneous, and still only incomplete information is available on their structure, subunit composition, and stoichiometry. This is due to the lack of selective ligands to study the role of nAChR under physiological or pathological conditions; so far, only compounds showing selectivity between alpha4beta2 and alpha7 receptors have been obtained. The nicotinic receptor ligands have been designed starting from lead compounds from natural sources such as nicotine, cytisine, or epibatidine, and, more recently, through the high-throughput screening of chemical libraries. This review focuses on the structure of the new agonists, antagonists, and allosteric ligands of nicotinic receptors, it highlights the current knowledge on the binding site models as a molecular modeling approach to design new compounds, and it discusses the nAChR modulators which have entered clinical trials.
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Affiliation(s)
- M Novella Romanelli
- Laboratory of Design, Synthesis, and Study of Biologically Active Heterocycles (HeteroBioLab), Department of Pharmaceutical Sciences, University of Florence, via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy.
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Exley R, Iturriaga-Vásquez P, Lukas RJ, Sher E, Cassels BK, Bermudez I. Evaluation of benzyltetrahydroisoquinolines as ligands for neuronal nicotinic acetylcholine receptors. Br J Pharmacol 2005; 146:15-24. [PMID: 15980871 PMCID: PMC1576253 DOI: 10.1038/sj.bjp.0706307] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Effects of derivatives of coclaurine (C), which mimic the 'eastern' or the nonquaternary halves of the alkaloids tetrandrine or d-tubocurarine, respectively, both of which are inhibitors of nicotinic acetylcholine receptors (nACh), were examined on recombinant, human alpha7, alpha4beta2 and alpha4beta4 nACh receptors expressed in Xenopus oocytes and clonal cell lines using two-electrode voltage clamping and radioligand binding techniques. In this limited series, Cs have higher affinity and are most potent at alpha4 subunit-containing-nACh receptors and least potent at homomeric alpha7 receptors, and this trend is very marked for the N-unsubstituted C and its O,O'-bisbenzyl derivative. 7-O-Benzyl-N-methylcoclaurine (BBCM) and its 12-O-methyl derivative showed the highest affinities and potencies at all three receptor subtypes, and this suggests that lipophilicity at C7 and/or C12 increases potency. Laudanosine and armepavine (A) were noncompetitive and voltage-dependent inhibitors of alpha7, alpha4beta2 or alpha4beta4 receptors, but the bulkier C7-benzylated 7BNMC (7-O-benzyl-N-methylcoclaurine) and 7B12MNMC (7-O-benzyl-N,12-O-dimethyl coclaurine) were voltage-independent, noncompetitive inhibitors of nACh receptors. Voltage-dependence was also lost on going from A to its N-ethyl analogue. These studies suggest that C derivatives may be useful tools for studies characterising the antagonist and ion channel sites on human alpha7, alpha4beta2 or alpha4beta4 nACh receptors and for revealing structure-function relationships for nACh receptor antagonists.
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Affiliation(s)
- Richard Exley
- School of Biological and Molecular Sciences, Oxford Brookes University, Gipsy Lane, Oxford OX3 0BP
| | - Patricio Iturriaga-Vásquez
- Millennium Institute for Advanced Studies in Cell Biology and Biotechnology and Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Ronald J Lukas
- Division of Neurobiology, Barrow Neurological Institute, Phoenix, AZ, U.S.A
| | - Emanuele Sher
- Eli Lilly and Co. Lilly Research Centre, Erl Wood Manor, Windlesham, Surrey
| | - Bruce K Cassels
- Millennium Institute for Advanced Studies in Cell Biology and Biotechnology and Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Isabel Bermudez
- School of Biological and Molecular Sciences, Oxford Brookes University, Gipsy Lane, Oxford OX3 0BP
- Author for correspondence:
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Wang B, Yang L, Yan HL, Wang M, Xiao JG. Effect of Tetrandrine on Calcium-Dependent Tumour Necrosis Factor-alpha Production in Glia-Neurone Mixed Cultures. Basic Clin Pharmacol Toxicol 2005; 97:244-8. [PMID: 16176561 DOI: 10.1111/j.1742-7843.2005.pto_115.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tumour necrosis factor-alpha is believed to have a deleterious role in the pathophysiology of brain injury. Tetrandrine has protective effect on neuronal cells, however, the mechanisms involved in its action have not been clearly established. The aim of this study was to investigate the role of tetrandrine on calcium-dependent tumour necrosis factor-alpha production in glia-neurone mixed cultures. Glia-neurone mixed cultures were treated by addition of Ca2+ regulating agents for a period of 6 hr. Tetrandrine or/and TMB-8 were added 30 min. before the stimulation. The supernatant tumour necrosis factor-alpha levels were quantified by enzyme-linked immunosorbent assay. Exposure of lipopolysaccharide 10 and 100 ng/ml caused significant increase in tumour necrosis factor-alpha production respectively, with no alteration in cultures treated with 1 ng/ml lipopolysaccharide. Glia-neurone mixed cultures exhibited a marked elevation in tumour necrosis factor-alpha production after exposure to CaCl2, KCl, thapsigargin, BHQ and norepinephrine in the presence of lipopolysaccharide at 1 ng/ml respectively. Tetrandrine 0.3, 1, and 3 microM concentration-dependently reduced tumour necrosis factor-alpha production evoked by CaCl2 or KCl. Tetrandrine preincubation had no significant effect on the response to Ca2+-ATPase inhibitor thapsigargin or BHQ. Norepinephrine-induced tumour necrosis factor-alpha production was significantly reduced by tetrandrine and almost abolished by combination of tetrandrine and intracellular Ca2+ release inhibitor TMB-8. These results suggested that tetrandrine at a concentration of 0.3, 1, or 3 microM inhibited tumour necrosis factor-alpha production induced by Ca2+ entry in glia-neurone mixed cultures.
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Affiliation(s)
- Bin Wang
- Department of Pharmacology, Nanjing Medical University, Nanjing, 210029, China.
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Using experimental studies and theoretical calculations to analyze the molecular mechanism of coumarin, p-hydroxybenzoic acid, and cinnamic acid. J Mol Struct 2005. [DOI: 10.1016/j.molstruc.2005.02.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Abstract
This review covers beta-phenylethylamines and isoquinoline alkaloids derived from them, including further products of oxidation, condensation with formaldehyde and rearrangement, some of which do not contain as isoquinoline system, together with napthylisoquinoline alkaloids, which have a different biogenetic origin. The occurrence of the alkaloids with the structures of new bases, together with their reactions and syntheses, are reported. The literature from July 2003 to June 2004 is reviewed, with 145 references cited.
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Hsieh TJ, Lu LH, Su CC. NMR spectroscopic, mass spectroscopic, X-ray crystallographic, and theoretical studies of molecular mechanics of natural products: farformolide B and sesamin. Biophys Chem 2004; 114:13-20. [PMID: 15792856 DOI: 10.1016/j.bpc.2004.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2004] [Revised: 10/05/2004] [Accepted: 10/05/2004] [Indexed: 10/26/2022]
Abstract
Two natural products, farformolide B and sesamin were isolated from Farfugium japonicum and Cinnamomum kanehirae, respectively. The structures of the two natural products, including their relative stereochemistry, were elucidated using spectroscopic data and theoretical calculations. The molecule 1 (farformolide B) is newly recognized by X-ray crystallography. The two compounds were also investigated by a theoretical analysis using the B3LYP/6-31G* method of the Gaussian 03 package program. The theoretical results were supplemented by experimental data to determine the optimal geometric structures of the two compounds. The calculated molecular mechanics were found to compare well with the experimental data. Several important thermodynamic properties of the two products, including ionization potentials, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies, energy gaps, heat of formation, atomization energies, and vibration frequencies, were also calculated. The study also provided a good understanding of the stereochemical structure and thermodynamic properties of the two molecules.
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Affiliation(s)
- Tiane-Jye Hsieh
- Basic Medical Science Education Center, The Fooyin University, Ta-Liao, Kaohuing, Taiwan 831, R. O. C
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