1
|
Dorogan M, Namballa HK, Harding WW. Natural Product-Inspired Dopamine Receptor Ligands. J Med Chem 2024; 67:12463-12484. [PMID: 39038276 PMCID: PMC11320586 DOI: 10.1021/acs.jmedchem.4c00537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 06/30/2024] [Accepted: 07/11/2024] [Indexed: 07/24/2024]
Abstract
Due to their evolutionary bias as ligands for biologically relevant drug targets, natural products offer a unique opportunity as lead compounds in drug discovery. Given the involvement of dopamine receptors in various physiological and behavioral functions, they are linked to numerous diseases and disorders such as Parkinson's disease, schizophrenia, and substance use disorders. Consequently, ligands targeting dopamine receptors hold considerable therapeutic and investigative promise. As this perspective will highlight, dopamine receptor targeting natural products play a pivotal role as scaffolds with unique and beneficial pharmacological properties, allowing for natural product-inspired drug design and lead optimization. As such, dopamine receptor targeting natural products still have untapped potential to aid in the treatment of disorders and diseases related to central nervous system (CNS) and peripheral nervous system (PNS) dysfunction.
Collapse
Affiliation(s)
- Michael Dorogan
- Department
of Chemistry, Hunter College, City University
of New York, 695 Park
Avenue, New York, New York 10065, United States
| | - Hari K. Namballa
- Department
of Chemistry, Hunter College, City University
of New York, 695 Park
Avenue, New York, New York 10065, United States
| | - Wayne W. Harding
- Department
of Chemistry, Hunter College, City University
of New York, 695 Park
Avenue, New York, New York 10065, United States
- Program
in Biochemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, New York 10016, United States
- Program
in Chemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, New York 10016, United
States
| |
Collapse
|
2
|
Ostrea MC, Rosales RL, Joya-Tanglao M. Efficacy and safety of apomorphine pump infusion in Filipino patients insufficiently controlled on oral anti-Parkinson medications: an open-label, pilot study. Int J Neurosci 2024; 134:131-136. [PMID: 35722686 DOI: 10.1080/00207454.2022.2090352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 06/10/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Apomorphine hydrochloride is used in the management of advanced Parkinson disease (PD), either as a rescue medication for off periods during levodopa therapy or as a maintenance pump medication. This is the first study to describe the effects of apomorphine in Filipino patients with PD. OBJECTIVE To evaluate the safety and efficacy of apomorphine ampules (APO-go®) pump infusion in the treatment of motor fluctuations in patients inadequately controlled on oral anti-Parkinson medications. METHODS Patients diagnosed with PD who developed motor fluctuations with levodopa were evaluated at baseline and at the end of the study using the Modified Hoehn and Yahr (H&Y) Scale, the Unified Parkinson's Disease Rating Scale (UPDRS) and the Abnormal Involuntary Movement Scale (AIMS). After initial assessment, patients were administered 20 ampules of apomorphine hydrochloride 10 mg/mL by infusion pump over 20 days. Intention-to-treat (ITT) analysis included all patients who completed at least one posttreatment assessment. Motor disability based on modified H&Y scores, motor function and complications of therapy pre- and posttreatment were compared using Wilcoxon Signed Rank test. Chi-squared test was used to compare outcomes by age and sex. Frequencies of adverse reactions were recorded to evaluate the tolerability of the medication. RESULTS Ten patients (mean age 63 ± 9.7 years), 3 male and 7 female, were enrolled in the study. Patients were given apomorphine for at most 16 days. The doses used were 2.5 mg/0.50 mL (n = 2), 3 mg/0.60 mL (n = 6), 4 mg/0.80 mL (n = 1) and 7 mg/1.40 mL (n = 1). After obtaining the threshold dose, two patients discontinued treatment. Eight of nine patients showed significant improvement in H&Y scores after treatment (p < 0.017). There was marked improvement after 10 days of treatment in at least five of 10 patients in terms of motor function using UPDRS, which included tremor (p < 0.034), rigidity (p < 0.002), facial expression (p < 0.014), finger taps (p < 0.008), foot taps (p < 0.014) and gait (p < 0.006). Significant changes from pre- to posttreatment scores in the frequency of dyskinesias (p < 0.010) and dystonia (p < 0.025) were observed. Nine focus areas of AIMS showed significant improvements in the muscles of facial expression (p < 0.020), upper (p < 0.016) and lower extremities (p < 0.010), incapacitation by abnormal movement (p < 0.010) and patients' awareness of abnormal movements (p < 0.039). Six patients experienced adverse events, none of which were related to the study drug. CONCLUSION Apomorphine hydrochloride pump infusion therapy is potentially effective and safe in the treatment of motor fluctuations in Filipino patients with PD. This pilot study springboards safe engagements of Filipino PD patients in multicenter, large-scale trials.
Collapse
Affiliation(s)
- Marc C Ostrea
- Center for Neuro-diagnostic and Therapeutic Services, Metropolitan Medical Center, Manila, Philippines
| | - Raymond L Rosales
- Center for Neuro-diagnostic and Therapeutic Services, Metropolitan Medical Center, Manila, Philippines
- Research Center for Health Sciences, Faculty of Medicine and Surgery, University of Santo Tomas, Manila, Philippines
- Saint Luke's Medical Centre, Institute for Neurosciences, Quezon City, Philippines
| | - Michelle Joya-Tanglao
- Center for Neuro-diagnostic and Therapeutic Services, Metropolitan Medical Center, Manila, Philippines
| |
Collapse
|
3
|
Zhu R, Jiang G, Tang W, Zhao X, Chen F, Zhang X, Ye N. Aporphines: A privileged scaffold in CNS drug discovery. Eur J Med Chem 2023; 256:115414. [PMID: 37172474 DOI: 10.1016/j.ejmech.2023.115414] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/21/2023] [Accepted: 04/22/2023] [Indexed: 05/15/2023]
Abstract
Aporphine alkaloids embedded in 4H-dibenzo[de,g]quinoline four-ring structures belong to one of the largest subclasses of isoquinoline alkaloids. Aporphine is a privileged scaffold in the field of organic synthesis and medicinal chemistry for the discovery of new therapeutic agents for central nervous system (CNS) diseases, cancer, metabolic syndrome, and other diseases. In the past few decades, aporphine has attracted continuing interest to be widely used to develop selective or multitarget directed ligands (MTDLs) targeting the CNS (e.g., dopamine D1/2/5, serotonin 5-HT1A/2A/2C and 5-HT7, adrenergic α/β receptors, and cholinesterase enzymes), thereby serving as valuable pharmacological probes for mechanism studies or as potential leads for CNS drug discovery. The aims of the present review are to highlight the diverse CNS activities of aporphines, discuss their SAR, and briefly summarize general synthetic routes, which will pave the way for the design and development of new aporphine derivatives as promising CNS active drugs in the future.
Collapse
Affiliation(s)
- Rongfeng Zhu
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Guangqian Jiang
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Wanyu Tang
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Xiaobao Zhao
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Fan Chen
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Xiaoya Zhang
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Na Ye
- Department of Medicinal Chemistry, Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China.
| |
Collapse
|
4
|
Melikhova EY, Derrien N, Fleary-Roberts N, Forsyth SM, Papadouli S, Ruda AM, Thangavadivale VG, Tyler SNG, Moseley JD. Early Process Development and Scale-Up of Orally Active Apomorphine Drug Candidates. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Nolwenn Derrien
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | | | - Siân M. Forsyth
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | - Sofia Papadouli
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | - Antonio M. Ruda
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | | | - Simon N. G. Tyler
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | | |
Collapse
|
5
|
E S, Shang ZC, Qin SH, Li KL, Liu YN, Wu JL, Yan F, Cai W. A Systematic Method for the Identification of Aporphine Alkaloid Constituents in Sabia schumanniana Diels Using UHPLC-Q-Exactive Orbitrap/Mass Spectrometry. Molecules 2022; 27:molecules27217643. [PMID: 36364479 PMCID: PMC9656101 DOI: 10.3390/molecules27217643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/14/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022] Open
Abstract
Sabia schumanniana Diels (SSD) is a plant whose stems are used in traditional folk medicine for the treatment of lumbago and arthralgia. Previous studies have revealed chemical constituents of SSD, including triterpenoids and aporphine alkaloids. Aporphine alkaloids contain a variety of active components, which might facilitate the effective treatment of lumbago and arthralgia. However, only 5-oxoaporphine (fuseine) has been discovered in SSD to date. In this study, we sought to systematically identify the aporphine alkaloids in SSD. We established a fast and reliable method for the detection and identification of these aporphine alkaloids based on ultra-high-performance liquid chromatography (UHPLC)-Q-Exactive-Orbitrap/mass spectrometry combined with parallel reaction monitoring (PRM). We separated all of the analyzed samples using a Thermo Scientific Hypersil GOLD™ aQ C18 column (100 mm × 2.1 mm, 1.9 μm). Finally, we identified a total of 70 compounds by using data such as retention times and diagnostic ions. No fewer than 69 of these SSD aporphine alkaloids have been reported here for the first time. These findings may assist in future studies concerning this plant and will ultimately contribute to the research and development of new drugs.
Collapse
Affiliation(s)
- Shuai E
- School of Pharmacy, Weifang Medical University, Weifang 261000, China
| | - Zi-Chao Shang
- Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China
| | - Shi-han Qin
- School of Pharmacy, Weifang Medical University, Weifang 261000, China
| | - Kai-lin Li
- School of Pharmacy, Weifang Medical University, Weifang 261000, China
| | - Yan-nan Liu
- Nursing School, Hunan University of Medicine, Huaihua 418000, China
| | - Ji-Li Wu
- Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China
| | - Fang Yan
- School of Pharmacy, Weifang Medical University, Weifang 261000, China
- Correspondence: (F.Y.); (W.C.)
| | - Wei Cai
- School of Pharmacy, Weifang Medical University, Weifang 261000, China
- Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China
- Correspondence: (F.Y.); (W.C.)
| |
Collapse
|
6
|
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.
Collapse
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
| |
Collapse
|
7
|
Namballa HK, Madapa S, Sigalapalli DK, Harding WW. Semisynthetic Transformations on (+)-Boldine Reveal a 5-HT 2A/2CR Antagonist. JOURNAL OF NATURAL PRODUCTS 2022; 85:2149-2158. [PMID: 36001775 DOI: 10.1021/acs.jnatprod.2c00365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Aporphine alkaloids have shown affinity for serotonin receptors (5-HTRs), and there has been a recent upsurge of interest in aporphines as 5-HT2CR ligands. 1,2,9,10-Tetraoxygenated aporphine alkaloids in particular have demonstrated good affinity for 5-HTRs. In continued efforts to understand the impacts of structural modification of the 1,2,9,10-tetraoxygenated aporphine template on affinity, selectivity, and activity at 5-HT2R subtypes, we used (+)-boldine (8) as a semisynthetic feedstock in the preparation of C-2-alkoxylated (+)-predicentrine analogues. Compound 10n, which contains a benzyloxy group at C-2, has been identified as a novel 5-HT2CR ligand with strong affinity (4 nM) and moderate selectivity versus 5-HT2BR and 5-HT2AR (12-fold and 6-fold, respectively). Compound 10n functions as an antagonist at 5-HT2A and 5-HT2C receptors. Computational experiments indicate that several hydrophobic interactions as well as strong H-bond and salt bridge interactions between the protonated amine moiety in 10n and Asp134 are responsible for the potent 5-HT2CR affinity of this compound. Furthermore, compound 10n displays favorable predicted drug-like characteristics, which is encouraging toward future optimization.
Collapse
Affiliation(s)
- Hari K Namballa
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Sudharshan Madapa
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Dilep K Sigalapalli
- Department of Pharmaceutical Chemistry, Vignan Pharmacy College, Jawaharlal Nehru Technological University, Vadlamudi 522213, Andhra Pradesh, India
| | - Wayne W Harding
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Ph.D. Program in Biochemistry, CUNY Graduate Center, 365 5th Avenue, New York, New York 10016, United States
- Ph.D. Program in Chemistry, CUNY Graduate Center, 365 5th Avenue, New York, New York 10016, United States
| |
Collapse
|
8
|
Yasukawa T, Sakamoto K, Yamashita Y, Kobayashi S. Homologation of Aryl Aldehydes Using Nitromethane as a C1 Source Enabled by Nitrogen-Doped Carbon-Supported Palladium Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomohiro Yasukawa
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Karin Sakamoto
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasuhiro Yamashita
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu̅ Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
9
|
Ruda AM, Papadouli S, Thangavadivale V, Moseley JD. Application of the Polonovski Reaction: Scale-up of an Efficient and Environmentally Benign Opioid Demethylation. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.1c00462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antonio M. Ruda
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | - Sofia Papadouli
- CatSci Ltd., CBTC2, Capital Business Park, Wentloog, Cardiff CF3 2PX, U.K
| | | | | |
Collapse
|
10
|
Mao Q, Zhang B, Tian S, Qin W, Chen J, Huang XP, Xin Y, Yang H, Zhen XC, Shui W, Ye N. Structural optimizations and bioevaluation of N-H aporphine analogues as Gq-biased and selective serotonin 5-HT2C receptor agonists. Bioorg Chem 2022; 123:105795. [DOI: 10.1016/j.bioorg.2022.105795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 03/31/2022] [Accepted: 04/05/2022] [Indexed: 11/29/2022]
|
11
|
Plazas E, Avila M MC, Muñoz DR, Cuca S LE. Natural isoquinoline alkaloids: Pharmacological features and multi-target potential for complex diseases. Pharmacol Res 2022; 177:106126. [DOI: 10.1016/j.phrs.2022.106126] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/28/2022] [Accepted: 02/08/2022] [Indexed: 12/13/2022]
|
12
|
Lv J, Li ZH, Deng AJ, Qin HL. A unified total synthesis of benzo[ d][1,3]dioxole-type benzylisoquinoline alkaloids of aporphines, coptisines, and dibenzopyrrocolines. Org Biomol Chem 2021; 20:658-666. [PMID: 34951439 DOI: 10.1039/d1ob02258j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The first total synthesis of (S)-(+)-ovigerine, (S)-(+)-N-formylovigerine, and (6aS,6a'S)-(+)-ovigeridimerine of aporphine alkaloids with a benzo[d][1,3]dioxole structure feature was established. The strategy was based upon the well-known Pd-catalyzed arylation to set the aporphine framework, and Noyori asymmetric hydrogenation followed by diastereoselective resolution to achieve excellent enantioselectivity. By slightly modifying the total synthetic route and strategically combining it with a aza-Michael addition, Bischler-Napieralski reaction and N-arylation, this methodology was also applied to the total syntheses of benzo[d][1,3]dioxole-type benzylisoquinoline alkaloids of coptisines and dibenzopyrrocolines, including two impatiens, tetrahydrocoptisine, and quaternary coptisine bromide of coptisines and two dibenzopyrrocoline analogues, with the syntheses of all of these target compounds being efficient. Among the nine synthesized compounds, the total syntheses of the three aporphines and the two impatiens, all with ee values of greater than 99%, were reported for the first time. This work also represents the first unification of synthetic routes for the total synthesis of benzo[d][1,3]dioxole-type aporphines, coptisines, and dibenzopyrrocolines.
Collapse
Affiliation(s)
- Jie Lv
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
| | - Zhi-Hong Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
| | - An-Jun Deng
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
| | - Hai-Lin Qin
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
| |
Collapse
|
13
|
Su C, Xu WH, Guo RL, Zhang XL, Zhu XQ, Gao YR, Wang YQ. Synthesis of Aporphine Analogues via Palladium-Catalyzed Intramolecular Aryl-Aryl Dehydrogenative Coupling. J Org Chem 2021; 86:13618-13630. [PMID: 34498883 DOI: 10.1021/acs.joc.1c01649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reported herein is an intramolecular dehydrogenative coupling of two inert aryl C-H bonds for the synthesis of aporphine analogues. The process represents a novel tool for the preparation of aporphines via palladiun-catalyzed C-H bond activation. The present reaction is compatible with various functional groups, and the coupling products have been further applied for the synthesis of natural products aporphine and zenkerine.
Collapse
Affiliation(s)
- Chen Su
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| | - Wen-Hua Xu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| | - Rui-Li Guo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| | - Xing-Long Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| | - Xue-Qing Zhu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| | - Ya-Ru Gao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| | - Yong-Qiang Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China
| |
Collapse
|
14
|
Ali G, Cuny GD. 8-, 9-, and 11-Aryloxy Dimeric Aporphines and Their Pharmacological Activities. Molecules 2021; 26:4521. [PMID: 34361671 PMCID: PMC8347945 DOI: 10.3390/molecules26154521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 11/16/2022] Open
Abstract
Aporphines, a major group of aporphinoid alkaloids, exhibit interesting and diverse pharmacological activities. A set of dimeric aporphines with an aryloxy group at C8, C9, and C11 have been isolated from six genera and shown to elicit various biological activities such as antitumor, antimalarial, antimicrobial, antiplatelet aggregation, antifibrotic, immunosuppressive, and vasorelaxant properties. In this review, the nomenclature, chemical structures, botanical sources, pharmacological activities, and synthetic approaches of this set of dimeric alkaloids are presented.
Collapse
Affiliation(s)
- Ghada Ali
- Department of Chemistry, College of Natural Sciences and Mathematics, University of Houston, Houston, TX 77204, USA;
| | - Gregory D. Cuny
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204, USA
| |
Collapse
|
15
|
Sachdev S, Cabalteja CC, Cheloha RW. Strategies for targeting cell surface proteins using multivalent conjugates and chemical biology. Methods Cell Biol 2021; 166:205-222. [PMID: 34752333 PMCID: PMC8895325 DOI: 10.1016/bs.mcb.2021.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Proper function of receptors on the cell surface is essential for homeostasis. Compounds that target cell surface receptors to address dysregulation have proven exceptionally successful as therapeutic agents; however, the development of compounds with the desired specificity for receptors, cells, and tissues of choice has proven difficult in some cases. The use of compounds that can engage more than one binding site at the cell surface offers a path toward improving biological specificity or pharmacological properties. In this chapter we summarize historical context for the development of such bivalent compounds. We focus on developments in chemical methods and biological engineering to provide bivalent compounds in which the high affinity and specificity of antibodies are leveraged to create multifunctional conjugates with new and useful properties. The development of methods to meld biological macromolecules with synthetic compounds will facilitate modulation of receptor biology in ways not previously possible.
Collapse
Affiliation(s)
- Shivani Sachdev
- National Institutes of Health, National Institute of Diabetes, Digestive, and Kidney Diseases (NIDDK), Laboratory of Bioorganic Chemistry, Bethesda, MD, United States
| | - Chino C Cabalteja
- National Institutes of Health, National Institute of Diabetes, Digestive, and Kidney Diseases (NIDDK), Laboratory of Bioorganic Chemistry, Bethesda, MD, United States
| | - Ross W Cheloha
- National Institutes of Health, National Institute of Diabetes, Digestive, and Kidney Diseases (NIDDK), Laboratory of Bioorganic Chemistry, Bethesda, MD, United States.
| |
Collapse
|
16
|
Jin H, Jiang F, Cheng K, Huang L. Palladium-Catalyzed C8 Alkylation of 1-Naphthylamides and Its Application to the Synthesis of the Core Sturctures of Aporphine and Aristolactam Alkaloids. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
17
|
Karki A, Juarez R, Namballa HK, Alberts I, Harding WW. Identification of C10 nitrogen-containing aporphines with dopamine D 1 versus D 5 receptor selectivity. Bioorg Med Chem Lett 2020; 30:127053. [PMID: 32107165 DOI: 10.1016/j.bmcl.2020.127053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/18/2020] [Accepted: 02/20/2020] [Indexed: 12/01/2022]
Abstract
New aporphines containing C10 nitrogen substituents (viz. nitro, aniline or amide moieties), were synthesized and evaluated for affinity at human serotonin 5-HT1A and 5-HT2A receptors and at human dopamine D1, D2 and D5 receptors. Two series of analogs were investigated: series A which contain a sole C10 nitrogen substituent on the tetracyclic aporphine core and series B which are 1,2,10-trisubstituted aporphines. Remarkably, compounds from both series lacked affinity for the D5 receptor, thus attaining D1 versus D5 selectivity. Compound 20c was the most potent D1 ligand identified. Docking studies at D1 and D5 receptors indicate that the binding mode of 20c at the D1 receptor allows for stronger hydrophobic contacts, (primarily with Phe residues) as compared to the D5 receptor, accounting for its D1 versus D5 selectivity. Considering the lack of affinity for the D5 receptor (and low affinity at other receptors tested), compound 20c represents an interesting starting point for further structural diversification of aporphines as sub-type selective D1 receptor tools.
Collapse
Affiliation(s)
- Anupam Karki
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, NY 10065, USA; Ph.D. Program in Biochemistry, CUNY Graduate Center, 365 5(th) Avenue, New York, NY 10016, USA
| | - Reecan Juarez
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, NY 10065, USA
| | - Hari K Namballa
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, NY 10065, USA
| | - Ian Alberts
- LaGuardia Community College, Department of Chemistry, 31-10 Thompson Avenue, LIC, NY 11104, USA
| | - Wayne W Harding
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, NY 10065, USA; Ph.D. Program in Biochemistry, CUNY Graduate Center, 365 5(th) Avenue, New York, NY 10016, USA; Ph.D. Program in Chemistry, CUNY Graduate Center, 365 5(th) Avenue, New York, NY 10016, USA.
| |
Collapse
|
18
|
Recent advances in dopaminergic strategies for the treatment of Parkinson's disease. Acta Pharmacol Sin 2020; 41:471-482. [PMID: 32112042 PMCID: PMC7471472 DOI: 10.1038/s41401-020-0365-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/13/2020] [Indexed: 12/19/2022] Open
Abstract
Parkinson's disease (PD) is the second most common progressive neurodegenerative disease worldwide. However, there is no available therapy reversing the neurodegenerative process of PD. Based on the loss of dopamine or dopaminergic dysfunction in PD patients, most of the current therapies focus on symptomatic relief to improve patient quality of life. As dopamine replacement treatment remains the most effective symptomatic pharmacotherapy for PD, herein we provide an overview of the current pharmacotherapies, summarize the clinical development status of novel dopaminergic agents, and highlight the challenge and opportunity of emerging preclinical dopaminergic approaches aimed at managing the features and progression of PD.
Collapse
|
19
|
Park H, Urs AN, Zimmerman J, Liu C, Wang Q, Urs NM. Structure-Functional-Selectivity Relationship Studies of Novel Apomorphine Analogs to Develop D1R/D2R Biased Ligands. ACS Med Chem Lett 2020; 11:385-392. [PMID: 32184974 DOI: 10.1021/acsmedchemlett.9b00575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 01/06/2020] [Indexed: 12/13/2022] Open
Abstract
Loss of dopamine neurons is central to the manifestation of Parkinson's disease motor symptoms. The dopamine precursor L-DOPA, the most commonly used therapeutic agent for Parkinson's disease, can restore normal movement yet cause side-effects such as dyskinesias upon prolonged administration. Dopamine D1 and D2 receptors activate G-protein- and arrestin-dependent signaling pathways that regulate various dopamine-dependent functions including locomotion. Studies have shown that shifting the balance of dopamine receptor signaling toward the arrestin pathway can be beneficial for inducing normal movement, while reducing dyskinesias. However, simultaneous activation of both D1 and D2Rs is required for robust locomotor activity. Thus, it is desirable to develop ligands targeting both D1 and D2Rs and their functional selectivity. Here, we report structure-functional-selectivity relationship (SFSR) studies of novel apomorphine analogs to identify structural motifs responsible for biased activity at both D1 and D2Rs.
Collapse
Affiliation(s)
- Hyejin Park
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Aarti N. Urs
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville Florida 32610, United States
| | - Joseph Zimmerman
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville Florida 32610, United States
| | - Chuan Liu
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Qiu Wang
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Nikhil M. Urs
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville Florida 32610, United States
| |
Collapse
|
20
|
Mao Q, Zhang B, Li W, Tian S, Shui W, Ye N. Identification of Novel 1- O-Substituted Aporphine Analogues as Potent 5-HT 2C Receptor Agonists. ACS Chem Neurosci 2020; 11:549-559. [PMID: 31968160 DOI: 10.1021/acschemneuro.9b00563] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The 5-HT2C receptor has emerged as a promising target in the treatment of a variety of central nervous system disorders. We have first identified aporphines as a new class of 5-HT2C receptor agonists. Structure-activity relationship results indicate that the aporphine core may be required for 5-HT2C receptor activity, and substitutions at its C1 position are important for 5-HT2C receptor activity. Our efforts to optimize our hit 15781 lead to the identification of the highly potent and selective 5-HT2C agonist 18b (MQ02-439) with an EC50 value of 104 nM and weak antagonism at the 5-HT2A and 5-HT2B receptors. The findings may serve as good starting points for the development of more potent and selective 5-HT2C agonists as valuable pharmacological tools or potential drug candidates.
Collapse
Affiliation(s)
- Qi Mao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Bingjie Zhang
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wanwan Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Sheng Tian
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Wenqing Shui
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Na Ye
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| |
Collapse
|
21
|
|
22
|
Avci FG, Atas B, Aksoy CS, Kurpejovic E, Gulsoy Toplan G, Gurer C, Guillerminet M, Orelle C, Jault JM, Sariyar Akbulut B. Repurposing bioactive aporphine alkaloids as efflux pump inhibitors. Fitoterapia 2019; 139:104371. [PMID: 31629051 DOI: 10.1016/j.fitote.2019.104371] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/04/2019] [Accepted: 10/05/2019] [Indexed: 01/13/2023]
Abstract
Extrusion of drugs or drug-like compounds through bacterial efflux pumps is a serious health issue that leads to loss in drug efficacy. Combinatorial therapies of low-efficacy drugs with efflux pump inhibitors may help to restore the activities of such drugs. In this quest, natural products are attractive molecules, since in addition to their wide range of bioactivities they may inhibit efflux pumps. The current work repurposed the bioactive alkaloid roemerine as a potential efflux pump inhibitor. In Bacillus subtilis, both Bmr and BmrA, belonging to the major facilitator and the ATP-binding cassette superfamilies, respectively, were found to be inhibited by roemerine. Scanning electron microscopy and RNA-Seq analyses showed that it potentiated the effect of berberine. Growth rates and checkerboard assays confirmed the synergy of roemerine and berberine and that roemerine prevented berberine efflux by inhibiting Bmr. Transport assays with inverted membrane vesicles prepared from Escherichia coli overexpressing BmrA showed that increasing roemerine concentration decreased the transport of doxorubicin, the BmrA substrate, confirming that roemerine may also be considered as an inhibitor of BmrA. Thus, these findings suggest that conjugation of roemerine to substrates of efflux pumps, Bmr and BmrA, may help to potentiate the activity of their drug substrates.
Collapse
Affiliation(s)
- Fatma Gizem Avci
- Department of Bioengineering, Marmara University, 34722 Kadikoy, Istanbul, Turkey.
| | - Basak Atas
- Department of Bioengineering, Marmara University, 34722 Kadikoy, Istanbul, Turkey.
| | - Cemile Selin Aksoy
- Department of Bioengineering, Marmara University, 34722 Kadikoy, Istanbul, Turkey
| | - Eldin Kurpejovic
- Department of Bioengineering, Marmara University, 34722 Kadikoy, Istanbul, Turkey
| | - Gizem Gulsoy Toplan
- Department of Pharmacognosy, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey.
| | - Caglayan Gurer
- Department of Pharmacognosy, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey.
| | - Maxime Guillerminet
- University of Lyon, CNRS, UMR5086 "Molecular Microbiology and Structural Biochemistry", IBCP, 7 Passage du Vercors, F-69367 Lyon, France.
| | - Cedric Orelle
- University of Lyon, CNRS, UMR5086 "Molecular Microbiology and Structural Biochemistry", IBCP, 7 Passage du Vercors, F-69367 Lyon, France.
| | - Jean-Michel Jault
- University of Lyon, CNRS, UMR5086 "Molecular Microbiology and Structural Biochemistry", IBCP, 7 Passage du Vercors, F-69367 Lyon, France.
| | | |
Collapse
|
23
|
Ethnopharmacological Properties and Medicinal Uses of Litsea cubeba. PLANTS 2019; 8:plants8060150. [PMID: 31159425 PMCID: PMC6631214 DOI: 10.3390/plants8060150] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/26/2019] [Accepted: 05/30/2019] [Indexed: 01/22/2023]
Abstract
The genus Litsea is predominant in tropical and subtropical regions of India, China, Taiwan, and Japan. The plant possesses medicinal properties and has been traditionally used for curing various gastro-intestinal ailments (e.g., diarrhea, stomachache, indigestion, and gastroenteritis) along with diabetes, edema, cold, arthritis, asthma, and traumatic injury. Besides its medicinal properties, Litsea is known for its essential oil, which has protective action against several bacteria, possesses antioxidant and antiparasitic properties, exerts acute and genetic toxicity as well as cytotoxicity, and can even prevent several cancers. Here we summarize the ethnopharmacological properties, essentials oil, medicinal uses, and health benefits of an indigenous plant of northeast India, emphasizing the profound research to uplift the core and immense potential present in the conventional medicine of the country. This review is intended to provide insights into the gaps in our knowledge that need immediate focus on in-situ conservation strategies of Litsea due to its non-domesticated and dioecious nature, which may be the most viable approach and intense research for the long-term benefits of society and local peoples.
Collapse
|
24
|
Assessment of the cytotoxic effects of aporphine prototypes on head and neck cancer cells. Invest New Drugs 2019; 38:70-78. [PMID: 31102120 DOI: 10.1007/s10637-019-00784-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 04/18/2019] [Indexed: 12/22/2022]
Abstract
Purpose Among alkaloids, abundant secondary metabolites in plants, aporphines constitute a class of compounds with interesting biological activities, including anticancer effects. The present study evaluated the anticancer activities of 14 substances, including four aporphine derivatives acquired through the biomonitoring of (±)-apomorphine hydrochloride total synthesis from 2-phenethylamine and 3,4-dimethoxybenzaldehyde against head and neck squamous cell carcinoma (HNSCC). Methods The cytotoxic effects of compounds against a panel of HNSCC cell lines were determined by PrestoBlue cell viability assay, while the genotoxicity of substances was evaluated by micronucleus test. Cell death was detected by flow cytometry (Annexin V/7AAD) and western blot analysis was used to detect the presence of cleaved Caspase-3 molecules. Results The aporphine and isoquinoline derivatives APO, C1, and A5 significantly reduced HNSCC cell viability and promoted DNA damages in these cells. Further, by activating the Caspase-3 pathway, these substances were able to induce apoptosis. Conclusion Our results revealed that APO, C1, and A5 exhibit cytotoxic effects in HNSCC cells. The mechanisms of action appear to be partly via the generation of DNA damages and apoptosis induction through Caspase-3 pathway activation. This study provides preclinical data that suggest a potential therapeutic role for APO, C1, and A5 against head and neck cancer cells.
Collapse
|
25
|
Battistutta R, Lolli G. Inhibitory Properties of ATP-Competitive Coumestrol and Boldine Are Correlated to Different Modulations of CK2 Flexibility. JOURNAL OF NATURAL PRODUCTS 2019; 82:1014-1018. [PMID: 30840451 DOI: 10.1021/acs.jnatprod.8b00889] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Casein kinase 2 (CK2) is an anti-apoptotic cancer-sustaining protein kinase. Its crystallographic structures with the natural compounds coumestrol, a phytoestrogen, and boldine, an alkaloid, are reported. Coumestrol shows different inhibitory activity against the isolated catalytic α-subunit and the α2β2 holoenzyme and is able to discriminate between two conformations of the hinge/αD region, whose intrinsic flexibility is a relevant selectivity determinant among kinases. Boldine explores a small cavity at the bottom of the ATP-binding pocket through a local deviation from planarity, a unique case among CK2 inhibitors. The two compounds have different impacts on protein flexibility, which correlate with their different properties.
Collapse
Affiliation(s)
- Roberto Battistutta
- Department of Chemical Sciences , University of Padua and Institute of Biomolecular Chemistry, National Research Council (CNR) , 35131 Padua , Italy
| | - Graziano Lolli
- Department of Cellular, Computational and Integrative Biology - CIBIO , University of Trento , Via Sommarive 9 , 38123 Povo (TN) , Italy
| |
Collapse
|
26
|
Xu Y, Sromek AW, Neumeyer JL. Identification of fluorinated (R)-(−)-aporphine derivatives as potent and selective ligands at serotonin 5-HT2C receptor. Bioorg Med Chem Lett 2019; 29:230-233. [DOI: 10.1016/j.bmcl.2018.11.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 11/23/2018] [Indexed: 01/21/2023]
|
27
|
Heng HL, Chee CF, Thy CK, Tee JT, Chin SP, Herr DR, Buckle MJC, Paterson IC, Doughty SW, Abd Rahman N, Chung LY. In vitro functional evaluation of isolaureline, dicentrine and glaucine enantiomers at 5-HT 2 and α 1 receptors. Chem Biol Drug Des 2018; 93:132-138. [PMID: 30216681 DOI: 10.1111/cbdd.13390] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/26/2018] [Accepted: 09/02/2018] [Indexed: 10/28/2022]
Abstract
Compounds with activity at serotonin (5-hydroxytryptamine) 5-HT2 and α1 adrenergic receptors have potential for the treatment of central nervous system disorders, drug addiction or overdose. Isolaureline, dicentrine and glaucine enantiomers were synthesized, and their in vitro functional activities at human 5-HT2 and adrenergic α1 receptor subtypes were evaluated. The enantiomers of isolaureline and dicentrine acted as antagonists at 5-HT2 and α1 receptors with (R)-isolaureline showing the greatest potency (pKb = 8.14 at the 5-HT2C receptor). Both (R)- and (S)-glaucine also antagonized α1 receptors, but they behaved very differently to the other compounds at 5-HT2 receptors: (S)-glaucine acted as a partial agonist at all three 5-HT2 receptor subtypes, whereas (R)-glaucine appeared to act as a positive allosteric modulator at the 5-HT2A receptor.
Collapse
Affiliation(s)
- Hui Li Heng
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chin Fei Chee
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Chun Keng Thy
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Jia Ti Tee
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.,Department of Oral Biology and Craniofacial Sciences and Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Sek Peng Chin
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Deron R Herr
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Michael J C Buckle
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Ian C Paterson
- Department of Oral Biology and Craniofacial Sciences and Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Noorsaadah Abd Rahman
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Lip Yong Chung
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| |
Collapse
|
28
|
Sharma V, Jaiswal PK, Kumar S, Mathur M, Swami AK, Yadav DK, Chaudhary S. Discovery of Aporphine Analogues as Potential Antiplatelet and Antioxidant Agents: Design, Synthesis, Structure-Activity Relationships, Biological Evaluations, and in silico Molecular Docking Studies. ChemMedChem 2018; 13:1817-1832. [PMID: 30088331 DOI: 10.1002/cmdc.201800318] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/06/2018] [Indexed: 12/24/2022]
Abstract
To explore the potential of aporphine alkaloids, a novel series of functionalized aporphine analogues with alkoxy (OCH3 , OC2 H5 , OC3 H7 ) functional groups at C1/C2 of ring A and an acyl (COCH3 and COPh) or phenylsulfonyl (SO2 Ph and SO2 C6 H4 -3-CH3 ) functionality at the N6 position of ring B of the aporphine scaffold were synthesized and evaluated for their arachidonic acid (AA)-induced antiplatelet aggregation inhibitory activity and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free-radical-scavenging antioxidant activity, with acetylsalicylic acid and ascorbic acid as standard references, respectively. The preliminary structure-activity relationship related to AA-induced platelet aggregation inhibitory activity results showed that the aporphine analogues 1-[1,2,9,10-tetramethoxy-6a,7-dihydro-4H-dibenzo[de,g]quinolin-6(5H)-yl]ethanone and 1-[2-(benzyloxy)-1,9,10-trimethoxy-6a,7-dihydro-4H-dibenzo[de,g]quinolin-6(5H)-yl]ethanone to be the best compounds of the series. Moreover, the DPPH free-radical-scavenging antioxidant activity results demonstrated that the aporphine analogues 1,2,9,10-tetramethoxy-6-(methylsulfonyl)-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline, 2-ethoxy-1,9,10-trimethoxy-6-(methylsulfonyl)-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline, 1-ethoxy-2,9,10-trimethoxy-6-(methylsulfonyl)-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline, 2,9,10-trimethoxy-6-(methylsulfonyl)-1-propoxy-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline, and 1-(benzyloxy)-2,9,10-trimethoxy-6-(methylsulfonyl)-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline were the best compounds of the series. Moreover, in silico molecular docking simulation studies of the active analogues were also performed.
Collapse
Affiliation(s)
- Vashundhra Sharma
- Laboratory of Organic & Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur, 302017, India
| | - Pradeep K Jaiswal
- Laboratory of Organic & Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur, 302017, India
| | - Surendra Kumar
- College of Pharmacy, Gachon University of Medicine and Science, Incheon, South Korea
| | - Manas Mathur
- Department of Advance Molecular Microbiology, Seminal Applied Sciences Pvt. Ltd., Jaipur, 302015, India
| | - Ajit K Swami
- Department of Advance Molecular Microbiology, Seminal Applied Sciences Pvt. Ltd., Jaipur, 302015, India
| | - Dharmendra K Yadav
- College of Pharmacy, Gachon University of Medicine and Science, Incheon, South Korea
| | - Sandeep Chaudhary
- Laboratory of Organic & Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur, 302017, India
| |
Collapse
|
29
|
Kazemi Noureini S, Kheirabadi M, Masoumi F, Khosrogerdi F, Zarei Y, Suárez-Rozas C, Salas-Norambuena J, Kennedy Cassels B. Telomerase Inhibition by a New Synthetic Derivative of the Aporphine Alkaloid Boldine. Int J Mol Sci 2018; 19:ijms19041239. [PMID: 29671783 PMCID: PMC5979471 DOI: 10.3390/ijms19041239] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/15/2018] [Accepted: 04/16/2018] [Indexed: 12/16/2022] Open
Abstract
Telomerase, the enzyme responsible for cell immortality, is an important target in anti-cancer drug discovery. Boldine, an abundant aporphine alkaloid of Peumus boldus, is known to inhibit telomerase at non-toxic concentrations. Cytotoxicity of N-benzylsecoboldine hydrochloride (BSB), a synthetic derivative of boldine, was determined using the MTT method in MCF7 and MDA-MB231 cells. Aliquots of cell lysates were incubated with various concentrations of BSB in qTRAP (quantitative telomere repeat amplification protocol)-ligand experiments before substrate elongation by telomerase or amplification by hot-start Taq polymerase. The crystal structure of TERT, the catalytic subunit of telomerase from Tribolium castaneum, was used for docking and molecular dynamics analysis. The qTRAP-ligand data gave an IC50 value of about 0.17 ± 0.1 µM for BSB, roughly 400 times stronger than boldine, while the LD50 in the cytotoxicity assays were 12.5 and 21.88 µM, respectively, in cells treated for 48 h. Although both compounds interacted well with the active site, MD analysis suggests a second binding site with which BSB interacts via two hydrogen bonds, much more strongly than boldine. Theoretical analyses also evaluated the IC50 for BSB as submicromolar. BSB, with greater hydrophobicity and flexibility than boldine, represents a promising structure to inhibit telomerase at non-toxic concentrations.
Collapse
Affiliation(s)
- Sakineh Kazemi Noureini
- Department of Biology, Faculty of Sciences, Hakim Sabzevari University, Sabzevar 9617976487, Iran.
| | - Mitra Kheirabadi
- Department of Biology, Faculty of Sciences, Hakim Sabzevari University, Sabzevar 9617976487, Iran.
| | - Fatima Masoumi
- Department of Biology, Faculty of Sciences, Hakim Sabzevari University, Sabzevar 9617976487, Iran.
| | - Farve Khosrogerdi
- Department of Biology, Faculty of Sciences, Hakim Sabzevari University, Sabzevar 9617976487, Iran.
| | - Younes Zarei
- Department of Biology, Faculty of Sciences, Hakim Sabzevari University, Sabzevar 9617976487, Iran.
| | - Cristian Suárez-Rozas
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 1058, Chile.
| | - Julio Salas-Norambuena
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 1058, Chile.
| | - Bruce Kennedy Cassels
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 1058, Chile.
| |
Collapse
|
30
|
Heng HL, Chee CF, Chin SP, Ouyang Y, Wang H, Buckle MJC, Herr DR, Paterson IC, Doughty SW, Abd Rahman N, Chung LY. Synthesis and evaluation of nuciferine and roemerine enantiomers as 5-HT 2 and α 1 receptor antagonists. MEDCHEMCOMM 2018; 9:576-582. [PMID: 30108948 PMCID: PMC6072365 DOI: 10.1039/c7md00629b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 02/09/2018] [Indexed: 11/21/2022]
Abstract
In this study, the (S)-enantiomers of the aporphine alkaloids, nuciferine and roemerine, were prepared via a synthetic route involving catalytic asymmetric hydrogenation and both stereoisomers were evaluated in vitro for functional activity at human 5-HT2 and adrenergic α1 receptor subtypes using a transforming growth factor-α shedding assay. Both enantiomers of each of the compounds were found to act as antagonists at 5-HT2 and α1 receptors. (R)-roemerine was the most potent compound at 5-HT2A and 5-HT2C receptors (pKb = 7.8-7.9) with good selectivity compared to (S)-roemerine at these two receptors and compared to its activity at 5-HT2B, α1A, α1B and α1D receptors.
Collapse
Affiliation(s)
- Hui Li Heng
- Department of Pharmacy , Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia . ; ; ; Tel: +60 3 79674959
| | - Chin Fei Chee
- Department of Pharmacy , Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia . ; ; ; Tel: +60 3 79674959
- Department of Chemistry , Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Sek Peng Chin
- Department of Pharmacy , Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia . ; ; ; Tel: +60 3 79674959
- Department of Chemistry , Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Yifan Ouyang
- School of Pharmacy , Ningxia Medical University , Yinchuan , 750004 , P. R. China
| | - Hao Wang
- School of Pharmacy , Ningxia Medical University , Yinchuan , 750004 , P. R. China
| | - Michael J C Buckle
- Department of Pharmacy , Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia . ; ; ; Tel: +60 3 79674959
| | - Deron R Herr
- Department of Pharmacology , Yong Loo Lin School of Medicine , National University of Singapore , 117597 Singapore
| | - Ian C Paterson
- Department of Oral Biology and Craniofacial Sciences and Oral Cancer Research and Coordinating Centre , Faculty of Dentistry , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Stephen W Doughty
- Penang Medical College , 4 Jalan Sepoy Lines , 10450 George Town , Pulau Pinang , Malaysia
| | - Noorsaadah Abd Rahman
- Department of Chemistry , Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Lip Yong Chung
- Department of Pharmacy , Faculty of Medicine , University of Malaya , 50603 Kuala Lumpur , Malaysia . ; ; ; Tel: +60 3 79674959
| |
Collapse
|
31
|
Borkar N, Mu H, Holm R. Challenges and trends in apomorphine drug delivery systems for the treatment of Parkinson's disease. Asian J Pharm Sci 2017; 13:507-517. [PMID: 32104425 PMCID: PMC7032113 DOI: 10.1016/j.ajps.2017.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/06/2017] [Accepted: 11/28/2017] [Indexed: 11/17/2022] Open
Abstract
Parkinson's disease (PD) is a chronic debilitating disease affecting approximately 1% of the population over the age of 60. The severity of PD is correlated to the degree of dopaminergic neuronal loss. Apomorphine has a similar chemical structure as the neurotransmitter dopamine and has been used for the treatment of advanced PD patients. In PD patients, apomorphine is normally administered subcutaneously with frequent injections because of the compound's extensive hepatic first-pass metabolism. There is, hence, a large unmet need for alternative administrative routes for apomorphine to improve patient compliance. The present review focuses on the research and development of alternative delivery of apomorphine, aiming to highlight the potential of non-invasive apomorphine therapy in PD, such as sublingual delivery and transdermal delivery.
Collapse
Affiliation(s)
- Nrupa Borkar
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen, 2100, Denmark
- Corresponding author. Department of Pharmacy, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark. Tel.: +45 71444174.
| | - Huiling Mu
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen, 2100, Denmark
| | - René Holm
- Drug Product Development, Janssen Research and Development, Johnson & Johnson, Turnhoutseweg 30, Beerse, 2340, Belgium
| |
Collapse
|
32
|
Abstract
This account describes the historical development of the coupling of γ,δ-unsaturated Fischer carbene complexes and o-alkynylbenzaldehydes, which directly affords hydrophenanthrene ring systems in a process where each reactant contributes five carbons to the newly-formed bicyclo[4.4.0]decane ring system. The process has been termed net [5+5] cycloaddition. Use of the reaction to produce various medicinally important natural products and/or their parent ring systems is discussed.
Collapse
Affiliation(s)
- James W. Herndon
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, 88003, USA
| | - Bishnu Dhakal
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, 88003, USA
| |
Collapse
|
33
|
Wang YS, Wen ZQ, Li BT, Zhang HB, Yang JH. Ethnobotany, phytochemistry, and pharmacology of the genus Litsea: An update. JOURNAL OF ETHNOPHARMACOLOGY 2016; 181:66-107. [PMID: 26812679 DOI: 10.1016/j.jep.2016.01.032] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 01/21/2016] [Accepted: 01/21/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The genus Litsea is one of the most diverse genera of evergreen trees or shrubs belong to Lauraceae, and comprises roughly 400 species of tree that are distributed abundantly throughout tropical and subtropical Asia, North and South America. Litsea species have been used globally in traditional medicine for the treatment of various diseases including influenza, stomach aches, diarrhea, diabetes, vomiting, bone pain, inflammation, illness related to the central nervous system and other ailments. The purpose of this review is to provide updated, comprehensive and categorized information on the ethnobotany, phytochemistry and pharmacological research of Litsea species in order to explore their therapeutic potential and evaluate future research opportunities. MATERIALS AND METHODS All the available information on Litsea species was actualised by systematically searching the scientific literatures including Chinese, Korean, Japanese, Indian, and South American herbal classics, library catalogs and scientific databases (PubMed, SciFinder, Web of Science, Google Scholar, VIP and Wanfang). The Plant List, International Plant Name index and Scientific Database of China Plant Species were used to validate scientific names. RESULTS 407 secondary metabolites have been reported from Litsea species. Litsea Species are sources of secondary metabolites with interesting chemical structures (alkaloids, lactones, sesquiterpenes, flavonoids, lignans, and essential oils) and significant bioactivities. Crude extracts, fractions and phytochemical constituents isolated from Litsea show a wide spectrum of in vitro and in vivo pharmacological activities including anticancer, anti-inflammatory, antimicrobial, antioxidant, antidiabetic, anti-HIV, insecticidal, etc. CONCLUSIONS From data collected in this review, the genus Litsea comprises a wide range of therapeutically promising and valuable plants, and has attracted much attention owing to its multiple functions. Many traditional uses of Litsea species have now been validated by modern pharmacology research. Deep and systematic phytochemical investigation of the genus Litsea and the pharmacological properties, especially its mechanism of action and toxicology, to illustrate its ethnomedicinal use, explore the therapeutic potential and support further health-care product development will undoubtedly be the focus of further research. Therefore, detailed and extensive studies and clinical evaluation of Litsea species should be carried out in future for the safety approval of therapeutic applications.
Collapse
Affiliation(s)
- Yun-Song Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Zheng-Qi Wen
- First Affiliated Hospital of Kunming Medical University, Kunming 650031, PR China
| | - Bi-Tao Li
- First Affiliated Hospital of Kunming Medical University, Kunming 650031, PR China
| | - Hong-Bin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Jing-Hua Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China.
| |
Collapse
|
34
|
A convenient formation of aporphine core via benzyne chemistry: conformational analysis and synthesis of (R)-aporphine. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.083] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
35
|
Ponnala S, Kapadia N, Madapa S, Alberts IL, Harding WW. Synthesis and evaluation of aporphine analogs containing C1 allyl isosteres at the h5-HT(2A) receptor. Bioorg Med Chem Lett 2015; 25:5102-6. [PMID: 26475518 DOI: 10.1016/j.bmcl.2015.10.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 09/30/2015] [Accepted: 10/05/2015] [Indexed: 11/19/2022]
Abstract
A series of C1 aporphine analogs related to compound 5 and that contain substituted allylic, alkynyl, nitrile, ester and benzyl groups was synthesized and evaluated for affinity at h5HT2A and α1A receptors in functional activity assays that measure calcium release. The presence of branched allylic substituent groups diminished affinity for the h5HT2A receptor. Likewise, the alkynyl, nitrile and ester derivatives evaluated displayed lower 5-HT2A receptor affinity as compared to 5. Hydrophobic, steric and electronic effects impact the affinity of p-substituted benzyl derivatives 8i-8k but in different ways. High hydrophobicity and size favor 5-HT2A affinity whereas, high electronegativity disfavors 5-HT2A affinity. p-Bromobenzyl analog 8k was identified as a 5-HT2A receptor selective ligand, with the highest 5-HT2A receptor affinity of any aporphine known to date. Most of the other analogs were selective for the 5-HT2A versus the α1A receptor. ChemScore binding energies from docking studies correlated qualitatively with the observed trends in affinity for 8i-8k, although the binding energies were not well differentiated quantitatively.
Collapse
Affiliation(s)
- Shashikanth Ponnala
- Hunter College, City University of New York, Department of Chemistry, 695 Park Avenue, NY 10065, USA
| | - Nirav Kapadia
- Hunter College, City University of New York, Department of Chemistry, 695 Park Avenue, NY 10065, USA; The Graduate Center, City University of New York, 365 5th Avenue, New York, NY 10016, USA
| | - Sudharshan Madapa
- Hunter College, City University of New York, Department of Chemistry, 695 Park Avenue, NY 10065, USA
| | - Ian L Alberts
- LaGuardia Community College, Department of Chemistry, 31-10 Thompson Avenue, LIC, NY 11104, USA
| | - Wayne W Harding
- Hunter College, City University of New York, Department of Chemistry, 695 Park Avenue, NY 10065, USA; The Graduate Center, City University of New York, 365 5th Avenue, New York, NY 10016, USA.
| |
Collapse
|
36
|
Rossini AFC, Muraca ACA, Casagrande GA, Raminelli C. Total Syntheses of Aporphine Alkaloids via Benzyne Chemistry: An Approach to the Formation of Aporphine Cores. J Org Chem 2015; 80:10033-40. [DOI: 10.1021/acs.joc.5b01634] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Allan F. C. Rossini
- Instituto
de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Ana Carolina A. Muraca
- Instituto
de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Gleison A. Casagrande
- Instituto
de Química, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Cristiano Raminelli
- Instituto
de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| |
Collapse
|
37
|
Ahmed HEA, Zayed MF, Ihmaid S. Molecular pharmacophore selectivity studies, virtual screening, and in silico ADMET analysis of GPCR antagonists. Med Chem Res 2015. [DOI: 10.1007/s00044-015-1389-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
38
|
Kapadia N, Harding WW. C4 phenyl aporphines with selective h5-HT(2B) receptor affinity. Bioorg Med Chem Lett 2015; 25:3451-4. [PMID: 26227772 DOI: 10.1016/j.bmcl.2015.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/06/2015] [Accepted: 07/07/2015] [Indexed: 10/23/2022]
Abstract
A group of aporphine alkaloids related to (±)-nantenine (1) and bearing a C4 phenyl and various C1 or N-substituents, was synthesized and evaluated for affinity to h5-HT receptors. In general, unlike nantenine, the analogs lack affinity for the h5-HT(2A) receptor and other 5-HT receptors but bind selectively to the h5-HT(2B) receptor. With regards to 5-HT(2B) affinity, there appears to be a low tolerance for bulky C1 or N-substituents when the C4 phenyl moiety is present. Compound 5a had the highest 5-HT(2B) affinity of the compounds tested, was found to be an antagonist and is selective vs other CNS receptors.
Collapse
Affiliation(s)
- Nirav Kapadia
- Chemistry Dept., Hunter College, CUNY, 695 Park Avenue, NY 10065, USA; The Graduate Center, City University of New York, 365 5th Avenue, NY 10016, USA
| | - Wayne W Harding
- Chemistry Dept., Hunter College, CUNY, 695 Park Avenue, NY 10065, USA; The Graduate Center, City University of New York, 365 5th Avenue, NY 10016, USA.
| |
Collapse
|
39
|
Chen Y, Yan Q, Zhong M, Zhao Q, Liu J, Di D, Liu J. Study on pharmacokinetics and tissue distribution of the isocorydine derivative (AICD) in rats by HPLC-DAD method. Acta Pharm Sin B 2015; 5:238-45. [PMID: 26579452 PMCID: PMC4629263 DOI: 10.1016/j.apsb.2015.03.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 12/01/2014] [Accepted: 02/02/2015] [Indexed: 01/09/2023] Open
Abstract
A simple and effective high-performance liquid chromatography with diode-array detection method coupled with a liquid-liquid extraction pretreatment has been developed for determining the pharmacokinetics and tissue distribution of a novel structurally modified derivative (8-acetamino-isocorydine) of isocorydine. According to the in vivo experiments data calculations by DAS 2.0 software, a two-compartment metabolic model was suitable for describing the pharmacokinetic of 8-acetamino-isocorydine in rats. 8-Acetamino-isocorydine was absorbed well after oral administration, and the absolute bioavailability was 76.5%. The half-life of 8-acetamino-isocorydine after intravenous and oral administration was 2.2 h and 2.0 h, respectively. In vivo, 8-acetamino-isocorydine was highly distributed in the lungs, kidney and liver; however, relatively little entered the brain, suggesting that 8-acetamino-isocorydine could not easily pass through the blood brain barrier. Our work describes the first characterization of the pharmacokinetic parameters and tissue distribution of 8-acetamino-isocorydine. The acquired data will provide useful information for the in vivo pharmacology of 8-acetamino-isocorydine, and can be applied to new drug research.
Collapse
Key Words
- 8-Acetamino-isocorydine
- AICD, 8-acetamino-isocorydine
- AUC, area under concentration-time curve
- Alkaloids
- F, absolute bioavailability
- HPLC-DAD, high-performance liquid chromatography with diode-array detection
- HPLC-UV, high-performance liquid chromatography coupled with ultraviolet detection
- High-performance liquid chromatography with diode-array detection
- ICD, isocorydine
- IS, internal standard
- LC-ESI-MS/MS, high-performance liquid chromatography–electrospray ionization–tandem mass spectrometry
- LLE, liquid-liquid extraction
- LLOQ, lower limit of quantification
- LOD, limit of detection
- Pharmacokinetics
- QC, quality control
- RE, relative error
- RP, reverse phase
- RSD, relative standard deviation
- SD, standard deviation.
- Tissue distribution
Collapse
|
40
|
Madapa S, Harding WW. Semisynthetic Studies on and Biological Evaluation of N-Methyllaurotetanine Analogues as Ligands for 5-HT Receptors. JOURNAL OF NATURAL PRODUCTS 2015; 78:722-729. [PMID: 25695425 DOI: 10.1021/np500893h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
N-Methyllaurotetanine (1) has been reported to display good affinity for the 5-HT1A receptor, but no structure-affinity studies have been performed to date. The commercially available alkaloid boldine (2) was used as the starting material for synthesis of various C-9 alkoxy analogues of N-methyllaurotetanine in order to gauge the effect of C-9 alkylation on affinity and selectivity at 5-HT1A, 5-HT2A, and 5-HT7 receptors. Mitsunobu reactions were implemented in the alkylation steps leading to the analogues. Modest improvement in 5-HT1A affinity was observed upon alkylation for most analogues. Thus, the C-9 hydroxy group of 1 is not critical for affinity to the 5-HT1A receptor. Some analogues displayed high affinity for the 5-HT7 receptor, comparable to N-methyllaurotetanine, with moderate selectivity vs 5-HT1A and 5-HT2A receptors.
Collapse
Affiliation(s)
- Sudharshan Madapa
- Department of Chemistry, Hunter College, City University of New York, , 695 Park Avenue, New York, New York 10065, United States
| | - Wayne W Harding
- Department of Chemistry, Hunter College, City University of New York, , 695 Park Avenue, New York, New York 10065, United States
| |
Collapse
|
41
|
Suh SE, Barros SA, Chenoweth DM. Triple Aryne-Tetrazine Reaction Enabling Rapid Access to a New Class of Polyaromatic Heterocycles. Chem Sci 2015; 6:5128-5132. [PMID: 26388984 PMCID: PMC4570739 DOI: 10.1039/c5sc01726b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We report the triple aryne–tetrazine reaction for rapid access to a new class of dibenzocinnoline heteroaromatics.
One of the most challenging goals of modern synthetic chemistry is to develop multi-step reactions for rapid and efficient access to complex molecules. We report a triple aryne–tetrazine reaction that enables rapid access to a new class of polyaromatic heterocycles. This new reaction, which couples diverse reactivity modes between simple aryne and tetrazine starting materials, proceeds in a single operation and takes less than 5 minutes in air with no metal catalyst.
Collapse
Affiliation(s)
- Sung-Eun Suh
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104 (USA)
| | - Stephanie A Barros
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104 (USA)
| | - David M Chenoweth
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104 (USA)
| |
Collapse
|
42
|
Nikolić D, Lankin DC, Cisowska T, Chen SN, Pauli GF, van Breemen RB. Nitrogen-Containing Constituents of Black Cohosh: Chemistry, Structure Elucidation, and Biological Activities. RECENT ADVANCES IN PHYTOCHEMISTRY 2015; 45:31-75. [PMID: 27795590 PMCID: PMC5084696 DOI: 10.1007/978-3-319-20397-3_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The roots/rhizomes of black cohosh (Actaea racemosa L. syn. Cimicifuga racemosa [L]. Nutt., Ranunculaceae) have been used traditionally by Native Americans to treat colds, rheumatism, and a variety of conditions related to women's health. In recent years black cohosh preparations have become popular dietary supplements among women seeking alternative treatments for menopausal complaints. The popularity of the plant has led to extensive phytochemical and biological investigations, including several clinical trials. Most of the phytochemical and biological research has focused on two abundant classes of compounds: the triterpene glycosides and phenolic acids. A third group of phytoconstituents that has received far less attention consists of the alkaloids and related compounds that contain nitrogen. This chapter summarizes the current state of knowledge of the chemistry and biological activities associated with this group of constituents and provides some perspective on their significance for future research on this interesting plant.
Collapse
Affiliation(s)
- Dejan Nikolić
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois College of Pharmacy, 833 S Wood Street, Chicago, IL 60612-7231, USA
| | - David C. Lankin
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois College of Pharmacy, 833 S Wood Street, Chicago, IL 60612-7231, USA
| | - Tamara Cisowska
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois College of Pharmacy, 833 S Wood Street, Chicago, IL 60612-7231, USA
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois College of Pharmacy, 833 S Wood Street, Chicago, IL 60612-7231, USA
| | - Guido F. Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois College of Pharmacy, 833 S Wood Street, Chicago, IL 60612-7231, USA
| | - Richard B. van Breemen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois College of Pharmacy, 833 S Wood Street, Chicago, IL 60612-7231, USA
| |
Collapse
|
43
|
Sromek AW, Zhang S, Akurathi V, Packard AB, Li W, Alagille D, Morley TJ, Baldwin R, Tamagnan G, Neumeyer JL. Convenient synthesis of 18F-radiolabeled R-(-)-N-n-propyl-2-(3-fluoropropanoxy-11-hydroxynoraporphine. J Labelled Comp Radiopharm 2014; 57:725-9. [PMID: 25400260 DOI: 10.1002/jlcr.3246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 10/21/2014] [Accepted: 10/23/2014] [Indexed: 01/17/2023]
Abstract
Aporphines are attractive candidates for imaging D2 receptor function because, as agonists rather than antagonists, they are selective for the receptor in the high affinity state. In contrast, D2 antagonists do not distinguish between the high and low affinity states, and in vitro data suggests that this distinction may be important in studying diseases characterized by D2 dysregulation, such as schizophrenia and Parkinson's disease. Accordingly, MCL-536 (R-(-)-N-n-propyl-2-(3-[(18)F]fluoropropanoxy-11-hydroxynoraporphine) was selected for labeling with (18)F based on in vitro data obtained for the non-radioactive ((19)F) compound. Fluorine-18-labeled MCL-536 was synthesized in 70% radiochemical yield, >99% radiochemical purity, and specific activity of 167 GBq/µmol (4.5 Ci/µmol) using p-toluenesulfonyl (tosyl) both as a novel protecting group for the phenol and a leaving group for the radiofluorination.
Collapse
Affiliation(s)
- Anna W Sromek
- Alcohol and Drug Abuse Research Center, McLean Hospital, Harvard Medical School, 115 Mill Street, Belmont, MA, 02478-9106, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Zhong M, Liu Y, Liu J, Di D, Xu M, Yang Y, Li W, Chen Y, Liu J. Isocorydine derivatives and their anticancer activities. Molecules 2014; 19:12099-115. [PMID: 25120059 PMCID: PMC6271052 DOI: 10.3390/molecules190812099] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/13/2014] [Accepted: 07/22/2014] [Indexed: 11/16/2022] Open
Abstract
In order to improve the anticancer activity of isocorydine (ICD), ten isocorydine derivatives were prepared through chemical structure modifications, and their in vitro and in vivo activities were experimentally investigated. 8-Amino-isocorydine (8) and 6a,7-dihydrogen-isocorydione (10) could inhibit the growth of human lung (A549), gastric (SGC7901) and liver (HepG2) cancer cell lines in vitro. Isocorydione (2) could inhibit the tumor growth of murine sarcoma S180-bearing mice, and 8-acetamino-isocorydine (11), a pro-drug of 8-amino-isocorydine (8), which is instable in water solution at room temperature, had a good inhibitory effect on murine hepatoma H22-induced tumors. The results suggested that the isocorydine structural modifications at C-8 could significantly improve the biological activity of this alkaloid, indicating its suitability as a lead compound in the development of an effective anticancer agent.
Collapse
Affiliation(s)
- Mei Zhong
- 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 730000, China.
| | - Yanjuan Liu
- 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 730000, China.
| | - Junxi Liu
- 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 730000, China.
| | - Duolong Di
- 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 730000, China.
| | - Mengrou Xu
- Gansu Key Laboratory of Preclinical Study for New Drugs, Institute of Pharmacology, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, China.
| | - Yaya Yang
- Gansu Key Laboratory of Preclinical Study for New Drugs, Institute of Pharmacology, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, China.
| | - Wenguang Li
- Gansu Key Laboratory of Preclinical Study for New Drugs, Institute of Pharmacology, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, China.
| | - Yali Chen
- Gansu Key Laboratory of Preclinical Study for New Drugs, Institute of Pharmacology, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, China.
| | - Jinxia Liu
- Institute of Biology, Gansu Academy of Sciences, Lanzhou 730000, China.
| |
Collapse
|
45
|
Ponnala S, Kapadia N, Navarro HA, Harding WW. Aporphinoid antagonists of 5-HT2A receptors: further evaluation of ring A substituents and the size of ring C. Chem Biol Drug Des 2014; 84:558-66. [PMID: 24766771 DOI: 10.1111/cbdd.12345] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 03/05/2014] [Accepted: 04/15/2014] [Indexed: 11/29/2022]
Abstract
A series of ring A-modified analogs of nantenine as well as structural variants in ring C were synthesized and evaluated for antagonist activity at 5-HT2A and α1A receptors. Halogenation improves 5-HT2A antagonist potency in molecules containing a C1 methoxyl/C2 methoxyl or C1 methoxyl/C2 hydroxyl moiety. Bromination or iodination (but not chlorination) with the latter moiety also significantly increased α1A antagonist potency. Homologation or contraction of ring C adversely affected antagonist activity at both receptors, implying that a six-membered ring C motif is beneficial for high antagonist potency at both receptors. Molecular docking studies suggest that the improved antagonist activity (by virtue of improved affinity) of C3-halogenated aporphines in this study is attributable to favorable interactions with the C3 halogen and F339 and/or F340.
Collapse
|
46
|
Cytotoxicity of Aporphine, Protoberberine, and Protopine Alkaloids from Dicranostigma leptopodum (Maxim.) Fedde. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:580483. [PMID: 24963327 PMCID: PMC4055583 DOI: 10.1155/2014/580483] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 05/02/2014] [Accepted: 05/02/2014] [Indexed: 11/18/2022]
Abstract
Nine alkaloids with three different structural skeletons were isolated from Dicranostigma leptopodum (Maxim.) Fedde (Papaveraceae) by repeated silica gel column chromatography. Their chemical structures were identified on the basic of physicochemical and spectroscopic data. Among them, 10-O-methylhernovine (1), nantenine (2), corytuberine (3), lagesianine A (4), and dihydrocryptopine (9) were first isolated from this plant. With a series of cytotoxic tests, compounds 2, 3, and 7 displayed cytotoxicity against SMMC-7721 with IC50 values of 70.08 ± 4.63, 73.22 ± 2.35, and 27.77 ± 2.29 μM, respectively.
Collapse
|
47
|
Ye LH, He XX, Kong LT, Liao YH, Pan RL, Xiao BX, Liu XM, Chang Q. Identification and characterization of potent CYP2D6 inhibitors in lotus leaves. JOURNAL OF ETHNOPHARMACOLOGY 2014; 153:190-196. [PMID: 24561383 DOI: 10.1016/j.jep.2014.02.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/25/2014] [Accepted: 02/08/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The herb of lotus (Nelumbo nucifera) leaves is a commonly used traditional Chinese herbal medicine that is utilized for the treatment of sunstroke, to assuage thirst, and to cure both diarrhea and fever in China. Modern pharmacological studies have demonstrated that the herb exhibits various pharmacological effects, such as anti-hyperlipidemia, anti-obesity, anti-oxidant, anti-HIV, anti-microbial, and anti-hypoglycemic activities. Currently, the herb is becoming more popular in China as a "tea drink" or as a main ingredient of some herbal formulations, which implies that the herb and/or its products are now more likely to be concurrently administered with conventional medicines for losing body weight and reducing blood lipids. However, its potential inhibitory effect on human cytochrome P450 (CYP) has not been systemically investigated to date. The present study was performed to assess the potential inhibitory effects of lotus leaf alcoholic extract (LAE), its major fractions, and its main compounds on five CYP isoenzymes (CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A4) in vitro. MATERIAL AND METHODS Five probe substrates were incubated with human liver microsomes in the presence or absence of the LAE, the alkaloid fraction (AF), the flavonoid fraction (FF), or the individual aporphine alkaloids, namely, nuciferine (NF), N-nornuciferine (N-NF), and 2-hydroxy-1-methoxyaporphine (HMA). After the incubation, the relative metabolites of the substrates were analyzed using LC-MS/MS. RESULTS The results showed that the LAE strongly inhibited CYP2D6 with an IC50 value of 12.05µg/mL and weakly inhibited other isoenzymes. In addition, FF was found to weakly inhibit CYP2D6, whereas AF exerted a markedly higher inhibitory effect on CYP2D6 activity with an IC50 value of 0.96µg/mL. The three aporphine alkaloids isolated from the AF (NF, N-NF, and HMA) significantly inhibited CYP2D6 with IC50 values of 3.78, 3.76, and 3.15µM, respectively. Their Lineweaver-Burk plots and Dixon plots showed that NF, N-NF, and HMA competitively inhibited CYP2D6 activity with Ki values of 1.88, 2.34, and 1.56µM, respectively. CONCLUSION The study revealed that the alkaloid compounds in lotus leaves exert a potent inhibitory effect on CYP2D6 isoenzyme. The possible drug interactions of the leaves and their preparations with conventional medicines should thus be taken into account.
Collapse
Affiliation(s)
- Lin-Hu Ye
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Xiao-Xi He
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Ling-Ti Kong
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Yong-Hong Liao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Rui-Le Pan
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Bing-Xin Xiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Xin-Min Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Qi Chang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
| |
Collapse
|
48
|
Salutaridine and its derivatives as thebaine-equivalents in the synthesis of aporphines. OPEN CHEM 2013. [DOI: 10.2478/s11532-013-0330-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractHere we report the transformation of tetracyclic morphinan salutaridine (1) into 2,3,10,11-tetrasubstituted (R)-aporphines. This method serves as another chemical proof of the previously verified biosynthetic connection with pentacyclic morphinan-6,8-diene-type thebaine. In the presence of nucleophiles, this procedure could lead to pharmacologically interesting new tetrasubstituted aporphinoids. The enantioselective synthesis of 7S-salutaridinol (2) has been also achieved in order to investigate the acid-catalyzed reactions of this natural morphinan.
Collapse
|
49
|
Meyer GM, Meyer MR, Wink CS, Zapp J, Maurer HH. Studies on the in vivo contribution of human cytochrome P450s to the hepatic metabolism of glaucine, a new drug of abuse. Biochem Pharmacol 2013; 86:1497-506. [DOI: 10.1016/j.bcp.2013.08.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 02/08/2023]
|
50
|
3,4-Dihydroxy- and 3,4-methylenedioxy- phenanthrene-type alkaloids with high selectivity for D2 dopamine receptor. Bioorg Med Chem Lett 2013; 23:4824-7. [DOI: 10.1016/j.bmcl.2013.06.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 06/24/2013] [Accepted: 06/27/2013] [Indexed: 01/11/2023]
|