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Feineis D, Bringmann G. Structural variety and pharmacological potential of naphthylisoquinoline alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2024; 91:1-410. [PMID: 38811064 DOI: 10.1016/bs.alkal.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Naphthylisoquinoline alkaloids are a fascinating class of natural biaryl compounds. They show characteristic mono- and dimeric scaffolds, with chiral axes and stereogenic centers. Since the appearance of the last comprehensive overview on these secondary plant metabolites in this series in 1995, the number of discovered representatives has tremendously increased to more than 280 examples known today. Many novel-type compounds have meanwhile been discovered, among them naphthylisoquinoline-related follow-up products like e.g., the first seco-type (i.e., ring-opened) and ring-contracted analogues. As highlighted in this review, the knowledge on the broad structural chemodiversity of naphthylisoquinoline alkaloids has been decisively driven forward by extensive phytochemical studies on the metabolite pattern of Ancistrocladus abbreviatus from Coastal West Africa, which is a particularly "creative" plant. These investigations furnished a considerable number of more than 80-mostly new-natural products from this single species, with promising antiplasmodial activities and with pronounced cytotoxic effects against human leukemia, pancreatic, cervical, and breast cancer cells. Another unique feature of naphthylisoquinoline alkaloids is their unprecedented biosynthetic origin from polyketidic precursors and not, as usual for isoquinoline alkaloids, from aromatic amino acids-a striking example of biosynthetic convergence in nature. Furthermore, remarkable botanical results are presented on the natural producers of naphthylisoquinoline alkaloids, the paleotropical Dioncophyllaceae and Ancistrocladaceae lianas, including first investigations on the chemoecological role of these plant metabolites and their storage and accumulation in particular plant organs.
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Affiliation(s)
- Doris Feineis
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany.
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2
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Hui Z, Wen H, Zhu J, Deng H, Jiang X, Ye XY, Wang L, Xie T, Bai R. Discovery of plant-derived anti-tumor natural products: Potential leads for anti-tumor drug discovery. Bioorg Chem 2024; 142:106957. [PMID: 37939507 DOI: 10.1016/j.bioorg.2023.106957] [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: 08/29/2023] [Revised: 10/14/2023] [Accepted: 10/31/2023] [Indexed: 11/10/2023]
Abstract
Natural products represent a paramount source of novel drugs. Numerous plant-derived natural products have demonstrated potent anti-tumor properties, thereby garnering considerable interest in their potential as anti-tumor drugs. This review compiles an overview of 242 recently discovered natural products, spanning the period from 2018 to the present. These natural products, which include 69 terpenoids, 42 alkaloids, 39 flavonoids, 21 steroids, 14 phenylpropanoids, 5 quinolines and 52 other compounds, are characterized by their respective chemical structures, anti-tumor activities, and mechanisms of action. By providing an essential reference and fresh insights, this review aims to support and inspire researchers engaged in the fields of natural products and anti-tumor drug discovery.
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Affiliation(s)
- Zi Hui
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Hao Wen
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Junlong Zhu
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Haowen Deng
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Xiaoying Jiang
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Xiang-Yang Ye
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Liwei Wang
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China.
| | - Tian Xie
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China.
| | - Renren Bai
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; Key Laboratory of Elemene Class Anti-tumor Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, PR China.
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3
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Luo EE, Liu SN, Wang ZJ, Chen LY, Liang CQ, Yu MY, Qin XJ. Oligomeric phloroglucinols with hAChE inhibitory and antibacterial activities from tropic Rhodomyrtus tomentosa. Bioorg Chem 2023; 141:106836. [PMID: 37774436 DOI: 10.1016/j.bioorg.2023.106836] [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: 06/30/2023] [Revised: 08/19/2023] [Accepted: 09/03/2023] [Indexed: 10/01/2023]
Abstract
Alzheimer's diseases (AD) and other infectious diseases caused by drug-resistance bacteria have posed a serious threat to human lives and global health. With the aim to search for human acetylcholinesterase (hAChE) inhibitors and antibacterial agents from medicinal plants, 16 phloroglucinol oligomers, including two new phloroglucinol monomers (1a and 1b), four new phloroglucinol dimers (3a, 3b, 4b, and 5a), six new phloroglucinol trimers (6a, 6b, 7a, 7b, 8a, and 8b), and two naturally occurring phloroglucinol monomers (2a and 2b), along with two known congeners (4a and 5b), were purified from the leaves of tropic Rhodomyrtus tomentosa. The structures and absolute configurations of these new isolates were unequivocally established by comprehensive analyses of their spectroscopic data (NMR and HRESIMS), ECD calculation, and single crystal X-ray diffraction. Structurally, 3a/3b shared a rare C-5' formyl group, whereas 6a/6b possessed a unique C-7' aromatic ring. In addition, 7a/7b and 8a/8b were rare phloroglucinol trimers with a bis-furan and a C-6' hemiketal group. Pharmacologically, the mixture of 3a and 3b showed the most potent human acetylcholinesterase (hAChE) inhibitory activity with an IC50 value of 1.21 ± 0.16 μM. The molecular docking studies of 3a and 3b in the hAChE binding sites were performed, displaying good agreement with the in vitro inhibitory effects. In addition, the mixture of 3a and 3b displayed the most significant anti-MRSA (methicillin-resistant Staphylococcus aureus) with MIC and MBC values of both 0.50 μg/mL, and scanning electron microscope (SEM) studies revealed that they could destroy the biofilm structures of MRSA. The findings provide potential candidates for the further development of anti-AD and anti-bacterial agents.
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Affiliation(s)
- E-E Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Si-Na Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhao-Jie Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, Yunnan Characteristic Plant Extraction Laboratory, School of Chemical Science and Technology, Yunnan University, Kunming 650500, People's Republic of China
| | - Ling-Yun Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; College of Pharmacy, Guilin Medical University, Guilin 541199, People's Republic of China
| | - Cheng-Qin Liang
- College of Pharmacy, Guilin Medical University, Guilin 541199, People's Republic of China
| | - Mu-Yuan Yu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China.
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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Rabie O, El-Nashar HAS, George MY, Majrashi TA, Al-Warhi T, Hassan FE, Eldehna WM, Mostafa NM. Phytochemical profiling and neuroprotective activity of Callistemon subulatus leaves against cyclophosphamide-induced chemobrain. Biomed Pharmacother 2023; 167:115596. [PMID: 37797461 DOI: 10.1016/j.biopha.2023.115596] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/07/2023] Open
Abstract
Cyclophosphamide (CPA) is a chemotherapeutic drug used for various types of cancers. However, patients receiving CPA for long periods suffer cognitive impairment associated with difficulties in learning, decreased concentration, and impaired memory. Chemotherapy-induced cognitive impairment, known as chemobrain, has been attributed to enhanced oxidative stress and inflammatory response. The current study aimed to identify the phytoconstituents of Callistemon subulatus extract (CSE) using HPLC-ESI/MS-MS analysis and evaluate its neuroprotective activity against CPA-induced chemobrain in rats. Fourteen compounds were identified following HPLC analysis including, five phlorglucinols, four flavonol glycosides, a triterpene, and a phenolic acid. Forty rats were divided into five groups treated for ten days as follows; group I (control group), group II received CPA (200 mg/kg, i.p.) on the 7th day, groups III and IV received CSE (200 and 400 mg/kg respectively, orally) for ten days and CPA (200 mg/kg, i.p.) on the 7th day, and group V received only CSE (400 mg/kg, orally) for ten days. The administration of CSE effectively ameliorated the deleterious effects of CPA on spatial and short-term memories, as evidenced by behavioral tests, Y-maze and passive avoidance. Such findings were further confirmed by histological examination. In addition, CSE counteracted the effect of CPA on hippocampal acetylcholinesterase (AChE) activity enhancing the level of acetylcholine. Owing to the CSE antioxidant properties, it hindered the CPA-induced redox imbalance, which is represented by decreased catalase and reduced glutathione levels, as well as enhanced lipid peroxidation. Therefore, CSE may be a promising natural candidate for protection against CPA-induced chemobrain in cancer patients.
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Affiliation(s)
- Omyma Rabie
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo 11566, Egypt
| | - Heba A S El-Nashar
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo 11566, Egypt
| | - Mina Y George
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| | - Taghreed A Majrashi
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Asir 61421, Saudi Arabia
| | - Tarfah Al-Warhi
- Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Fatma E Hassan
- Department of Physiology, General Medicine Practice Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia; Medical Physiology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Giza 11562, Egypt
| | - Wagdy M Eldehna
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, P.O. Box 33516, Kafrelsheikh, Egypt.
| | - Nada M Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo 11566, Egypt.
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Phan ND, Omar AM, Takahashi I, Baba H, Okumura T, Imura J, Okada T, Toyooka N, Fujii T, Awale S. Nicolaioidesin C: An Antiausterity Agent Shows Promising Antitumor Activity in a Pancreatic Cancer Xenograft Mouse Model. JOURNAL OF NATURAL PRODUCTS 2023; 86:1402-1410. [PMID: 36938707 DOI: 10.1021/acs.jnatprod.3c00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Human pancreatic tumors are hypovascular in nature, and their tumor microenvironment is often characterized by hypoxia and severe nutrient deprivation due to uncontrolled heterogeneous growth, a phenomenon known as "austerity". However, pancreatic tumor cells have the inherent ability to adapt and thrive even in such low nutrient and hypoxic microenvironments. Anticancer drugs such as gemcitabine and paclitaxel, which target rapidly proliferating cells, are often ineffective against nutrient-deprived pancreatic cancer cells. In order to overcome this limitation, the search for novel agents that can eliminate cancer cells' adaptations to nutrition starvation, also known as "antiausterity" agents, represents a promising strategy to make the cancer cells susceptible to treatment. The natural product (+)-nicolaioidesin C (Nic-C) was found to have potent antiausterity activity against the PANC-1 human pancreatic cancer cell line in a nutrient-deprived condition. However, its efficacy in vivo remained untested. To address this, we synthesized Nic-C in its racemic form and evaluated its antitumor potential in a human pancreatic cancer xenograft model. Nic-C inhibited pancreatic cancer cell migration and colony formation and significantly inhibited tumor growth in MIA PaCa-2 xenografts in a dose-dependent manner. Furthermore, Nic-C inhibited the Akt/mTOR and autophagy signaling pathways in both in vitro and in vivo studies. Metabolomic profiling of in vivo tumor samples suggests that Nic-C downregulates amino acid metabolism while upregulating sphingolipid metabolism.
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Affiliation(s)
- Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
| | - Ikue Takahashi
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
| | - Hayato Baba
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Tomoyuki Okumura
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Johji Imura
- Department of Diagnostic Pathology, University of Toyama, Toyama 930-0194, Japan
| | - Takuya Okada
- Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
- Graduate School of Innovative Life Science, University of Toyama, Toyama 930-8555, Japan
| | - Naoki Toyooka
- Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
- Graduate School of Innovative Life Science, University of Toyama, Toyama 930-8555, Japan
| | - Tsutomu Fujii
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
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Awale S, Baba H, Phan ND, Kim MJ, Maneenet J, Sawaki K, Kanda M, Okumura T, Fujii T, Okada T, Maruyama T, Okada T, Toyooka N. Targeting Pancreatic Cancer with Novel Plumbagin Derivatives: Design, Synthesis, Molecular Mechanism, In Vitro and In Vivo Evaluation. J Med Chem 2023. [PMID: 37257133 DOI: 10.1021/acs.jmedchem.3c00394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Pancreatic tumors grow in an "austerity" tumor microenvironment characterized by nutrient deprivation and hypoxia. This leads to the activation of adaptive pathways in pancreatic cancer cells, promoting tolerance to nutrition starvation and aggressive malignancy. Conventional anticancer drugs are often ineffective against tumors that grow in such austerity condition. Plumbagin, a plant-derived naphthoquinone, has shown potent preferential cytotoxicity against pancreatic cancer cells under nutrient-deprived conditions. Therefore, we synthesized a series of plumbagin derivatives and found that 2-(cyclohexylmethyl)-plumbagin (3f) was the most promising compound with a PC50 value of 0.11 μM. Mechanistically, 3f was found to inhibit the PI3K/Akt/mTOR signaling pathways, leading to cancer cell death under nutrient-deprived conditions. In vivo studies using pancreatic cancer xenograft mouse models confirmed the efficacy of 3f, demonstrating significant inhibition of tumor growth in a dose-dependent manner. Compound 3f represents a highly promising lead for anticancer drug development based on an antiausterity strategy.
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Affiliation(s)
- Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Hayato Baba
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Juthamart Maneenet
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Koichi Sawaki
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan
| | - Mitsuro Kanda
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan
| | - Tomoyuki Okumura
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Tsutomu Fujii
- Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Takuya Okada
- Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Takahiro Maruyama
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Takahiro Okada
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Naoki Toyooka
- Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
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7
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Tomohara K, Maneenet J, Ohashi N, Nose T, Fujii R, Kim MJ, Sun S, Awale S. Ugi Adducts as Novel Anti-austerity Agents against PANC-1 Human Pancreatic Cancer Cell Line: A Rapid Synthetic Approach. Biol Pharm Bull 2023; 46:1412-1420. [PMID: 37779042 DOI: 10.1248/bpb.b23-00224] [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] [Indexed: 10/03/2023]
Abstract
Pancreatic cancer cells have an inherent tolerance to withstand nutrition starvation, allowing them to survive in hypovascular tumor microenvironments that lack of sufficient nutrients and oxygen. Developing anti-cancer agents that target this tolerance to nutritional starvation is a promising anti-austerity strategy for eradicating pancreatic cancer cells in their microenvironment. In this study, we employed a chemical biology approach using the Ugi reaction to rapidly synthesize new anti-austerity agents and evaluate their structure-activity relationships. Out of seventeen Ugi adducts tested, Ugi adduct 11 exhibited the strongest anti-austerity activity, showing preferential cytotoxicity against PANC-1 pancreatic cancer cells with a PC50 value of 0.5 µM. Further biological investigation of Ugi adduct 11 revealed a dramatic alteration of cellular morphology, leading to PANC-1 cell death within 24 h under nutrient-deprived conditions. Furthermore, the R absolute configuration of 11 was found to significantly contribute to the preferential anti-austerity ability toward PANC-1, with a PC50 value of 0.2 µM. Mechanistically, Ugi adduct (R)-11 was found to inhibit the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) signaling pathway preferentially under nutrition starvation conditions. Consequently, Ugi-adduct (R)-11 could be a promising candidate for drug development targeting pancreatic cancer based on the anti-austerity strategy. Our study also demonstrated that the Ugi reaction-based chemical engineering of natural product extracts can be used as a rapid method for discovering novel anti-austerity agents for combating pancreatic cancer.
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Affiliation(s)
| | - Juthamart Maneenet
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama
| | - Nao Ohashi
- Graduate School of Science, Kyushu University
| | - Takeru Nose
- Faculty of Arts and Science, Kyushu University
- Graduate School of Science, Kyushu University
| | - Rintaro Fujii
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama
| | - Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama
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Chemical Constituents of Callistemon subulatus and Their Anti-Pancreatic Cancer Activity against Human PANC-1 Cell Line. PLANTS 2022; 11:plants11192466. [PMID: 36235333 PMCID: PMC9570665 DOI: 10.3390/plants11192466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022]
Abstract
An n-hexane extract of Callistemon subulatus was found to exhibit potent cytotoxicity against PANC-1 human pancreatic cancer cells, preferentially under nutrition starvation conditions, with a PC50 value of 6.2 µg/mL. Phytochemical investigation of this bioactive extract resulted in the isolation of fifteen compounds (1–15), including a new compound, subulatone A (–). The structure of compound 1 was elucidated using HRFABMS and NMR spectroscopic analyses. The isolated compounds were tested for their preferential cytotoxicity against the PANC-1 human pancreatic cancer cell line, using an anti-austerity strategy. Among these, myrtucommulone A (2) showed highly potent preferential cytotoxicity, with a PC50 value of 0.28 µM. Myrtucommulone A (2) was found to alter PANC-1 cell morphology, inhibit cell migration, and downregulate the PI3K/Akt/mTOR and autophagy signaling pathways in nutrient-deprived media, leading to cancer cell death. Therefore, myrtucommulone A (2) is a lead compound for anticancer drug development based on an anti-austerity strategy.
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9
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Okada T, Chino Y, Yokoyama K, Fujihashi Y, Duy Phan N, Maneenet J, Prudhvi L, Awale S, Toyooka N. Design and synthesis of novel pipernonaline derivatives as anti-austerity agents against human pancreatic cancer PANC-1 cells. Bioorg Med Chem 2022; 71:116963. [PMID: 35969895 DOI: 10.1016/j.bmc.2022.116963] [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: 07/08/2022] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/19/2022]
Abstract
Pipernonaline (1), one of the components of the spice pepper, preferentially reduced the survival of human pancreatic cancer PANC-1 cells under nutrient-deprived conditions witha PC50 value of 7.2 μM, suggesting that1couldpotentially lead to the development ofnew anticanceragents basedon theanti-austerity strategy. We have synthesized a total of 31 pipernonaline derivatives, revealing clear structure-activity relationships. Compound 9, which showed the strongest preferential cytotoxicity among synthesized derivatives, inhibited Akt activation and cancer cell migration, making it an extremely promising candidate compound for new pancreatic cancer agents based on the anti-austerity strategy.
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Affiliation(s)
- Takuya Okada
- Graduate School of Pharma-Medical Sciences, University of Toyama, Toyama 930-8555, Japan; Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan.
| | - Yuri Chino
- Graduate School of Pharma-Medical Sciences, University of Toyama, Toyama 930-8555, Japan
| | - Keita Yokoyama
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Yuki Fujihashi
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nguyễn Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Juthamart Maneenet
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Lanke Prudhvi
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Naoki Toyooka
- Graduate School of Pharma-Medical Sciences, University of Toyama, Toyama 930-8555, Japan; Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
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10
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Asakawa R, Fuchiyama K, Ishii Y, Hosaka K, Kobayashi A, Shimazaki K, Nagasawa J, Tsuchida S, Ushida K, Matsubayashi M, Furuyama Y, Ohgane K, Kuramochi K. Synthesis and Cytotoxic Activities of 8- and 6-Demethyleucalyptins. Biosci Biotechnol Biochem 2022; 86:1200-1206. [PMID: 35776954 DOI: 10.1093/bbb/zbac105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/24/2022] [Indexed: 11/13/2022]
Abstract
Secondary metabolites in plants influence the health of herbivores such as Japanese rock ptarmigans that feed on the leaves and fruits of alpine plants. Thus, it is important to understand the secondary metabolites of alpine plants and their biological activities for conserving Japanese rock ptarmigans. We isolated C-methylflavone from the leaves of Kalmia procumbens, on which Japanese rock ptarmigans feed. Although its structure was deduced to be 8-demethyleucalyptin by comparing its NMR data with the reported ones, the possibility that the isolated compound is 6-demethyleucalyptin cannot be ruled out. Thus, both isomers were synthesized. The isolated compound was unambiguously determined to be 8-demethyleucalyptin by comparing its NMR data with those of the synthetic ones. Cytotoxic evaluation of 8- and 6-demethyleucalyptins revealed that only the former showed cytotoxicity against HCT116 and MRC-5 cells. The present study provides not only easy access to 8- and 6-demethyleucalyptins, but also their biological information.
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Affiliation(s)
- Ryuki Asakawa
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
| | - Kanta Fuchiyama
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
| | - Yunosuke Ishii
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
| | - Keisuke Hosaka
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
| | - Atsushi Kobayashi
- Shin-etsu Nature Conservation Office, Environmental Ministry Japan, 1108 Asahi-cho, Nagano, Japan
| | - Kei Shimazaki
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
| | - Junki Nagasawa
- Department of Veterinary Immunology, Graduate School of Veterinary Sciences, Osaka Metropolitan University, 1-58 Rinku-oraikita, Izumisano, Osaka, Japan
| | - Sayaka Tsuchida
- College of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi, Japan
| | - Kazunari Ushida
- College of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi, Japan
| | - Makoto Matsubayashi
- Department of Veterinary Immunology, Graduate School of Veterinary Sciences, Osaka Metropolitan University, 1-58 Rinku-oraikita, Izumisano, Osaka, Japan.,Department of Veterinary Parasitology, Faculty of Veterinary Medicine, Airlangga University, Mulyorejo, Surabaya, 60115, Indonesia
| | - Yuuki Furuyama
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
| | - Kenji Ohgane
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan.,Department of Chemistry, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo, Japan
| | - Kouji Kuramochi
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan
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11
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Phan ND, Omar AM, Sun S, Maneenet J, Dibwe DF, Sato M, Kalauni SK, Toyooka N, Fujii T, Awale S. Abietane diterpenes from Abies spectabilis and their anti-pancreatic cancer activity against the MIA PaCa-2 cell line. Bioorg Med Chem Lett 2022; 66:128723. [PMID: 35395369 DOI: 10.1016/j.bmcl.2022.128723] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/22/2022] [Accepted: 04/02/2022] [Indexed: 11/22/2022]
Abstract
An ethanolic extract of the stem of Abies spectabilis exhibited strong cytotoxicity against MIA PaCa-2 human pancreatic cancer cells preferentially under nutrient-deprived conditions. Therefore, phytochemical investigation of this bioactive extract was carried out, and that led the isolation of ten compounds (1-10) including a new abietane-type diterpene (1). The structure of the new compound (1) was elucidated by combined spectroscopic techniques, including HRFABMS, NMR and quantum ECD calculation. All the isolated compounds were evaluated for their efficacy against MIA PaCa-2 human pancreatic cancer cell line by employing an anti-austerity strategy. Among the tested compounds, dehydroabietinol (5) displayed the most potent activity with a PC50 value of 6.6 μM. Dehydroabietinol (5) was also found to retard the MIA PaCa-2 cell migration under normal nutrient-rich conditions displaying its anti-metastatic potential. Investigation on the mechanism suggested that dehydroabietinol (5) is an inhibitor of the key cancer cell survival Akt/mTOR/autophagy signaling pathway.
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Affiliation(s)
- Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; Department of Surgery and Science, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Juthamart Maneenet
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Dya Fita Dibwe
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Mao Sato
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | | | - Naoki Toyooka
- Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan; Graduate School of Innovative Life Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Tsutomu Fujii
- Department of Surgery and Science, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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12
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Dethe DH, Dherange BD, Das S, Srivastava A. Bioinspired enantioselective total syntheses of antibacterial callistrilones enabled by double S N2' cascade. Chem Commun (Camb) 2022; 58:5474-5477. [PMID: 35416218 DOI: 10.1039/d2cc01398c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bioinspired, catalytic approach to the enantioselective total syntheses of antibacterial callistrilones A, C-E and 13-epi-callistrilone E natural products containing an unprecedented, sterically compact [1]benzofuro-[2,3-a]xanthene 6/6/6/5/6/3-fused hexacyclic skeleton is described. The key features of the synthesis include a highly regio- and diastereoselective double SN2' cascade reaction, Lewis acid catalysed Michael addition and late stage diastereoselective epoxide formation from the sterically hindered β-face of the alkene as the key steps.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
| | - Balu D Dherange
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
| | - Saikat Das
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
| | - Aparna Srivastava
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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13
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Rathore R, Rai N. Pharmacological action and underlying molecular mechanism of Callistemon: A genus of promising medicinal herbs. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 99:154013. [PMID: 35279614 DOI: 10.1016/j.phymed.2022.154013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 01/31/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
INTRODUCTION The genus Callistemon belongs to a group of medically significant plants which have found tremendous use in traditional medicine across the globe. They are reported for anti-cancer, neuroprotective, anti-inflammatory, antioxidant, anti-microbial, and many other significant medicinal attributes. However, the current use of this genus is limited mainly to ornamental and recreational purposes. Recent studies have reported several novel compounds like phloroglucinol derivatives, terpenes, phenolics, etc., from Callistemon spp., which have great medical significance. Further, there is a surge of recent studies reporting novel pharmacological properties of Callistemon. The number of review studies discussing the underlying molecular mechanism behind the pharmacological action of Callistemon is quite limited. METHODS The literature search for studies published from 1991 to 2021 using Google scholar and PubMed were selected. The review documented relevant literature focused on Callistemon spp exhibiting significant pharmacological effects. RESULTS This review deals with the pharmacological properties of Callistemon and the underlying molecular mechanism responsible for protective effect in several pathophysiological conditions. This study updated the current information regarding the medicinal importance of Callistemon spp. for research and the public community. DISCUSSION AND CONCLUSIONS The preliminary studies, interrogating pharmacological properties of Callistemon spp., hold great promise and demand further research to decipher the mode of action. More and more research are needed in this direction to explore the full potential of the genus Callistemon as a medicinal herb.
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Affiliation(s)
- Rinu Rathore
- Department of Biotechnology, Mohanlal Sukhadia University, Udaipur, Rajasthan 313001, India
| | - Nitish Rai
- Department of Biotechnology, Mohanlal Sukhadia University, Udaipur, Rajasthan 313001, India.
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14
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Tawila AM, Omar AM, Phan ND, Takahashi I, Maneenet J, Awale S. New callistrilone epimers from Callistemon citrinus and their antiausterity activity against the PANC-1 human pancreatic cancer cell line. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Kohyama A, Kim MJ, Yokoyama R, Sun S, Omar AM, Phan ND, Meselhy MR, Tsuge K, Awale S, Matsuya Y. Structure-activity relationship and mechanistic study on guggulsterone derivatives; Discovery of new anti-pancreatic cancer candidate. Bioorg Med Chem 2021; 54:116563. [PMID: 34942553 DOI: 10.1016/j.bmc.2021.116563] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 12/24/2022]
Abstract
Pancreatic cancer is one of the deadliest types of malignancies. A new intervention aiming to combat pancreatic cancer is targeting its extra-ordinary ability to tolerate nutrition starvation, a phenomenon known as "Austerity". As a part of a research program aiming to develop a new-generation of anticancer agents, known as "anti-austerity agents", guggulsterone derivatives (GSDs) were identified as unique anti-austerity agents in terms of potency and selectivity. These agents are able to exert preferential cytotoxic activity only under nutrient-deprived conditions with little or no toxicity under normal conditions. In the present study, a library of 14 GSDs was synthesized and screened against PANC-1 human pancreatic cells. Among tested compounds, GSD-11 showed the most potent activity with PC50 a value of 0.72 μM. It also inhibited pancreatic cancer cell migration and colony formation in a concentration-dependent manner. A mechanistic study revealed that this compound can inhibit the activation of the Akt/mTOR signaling pathway. Therefore, GSD-11 could be a promising lead compound for the anticancer drug discovery against pancreatic cancer.
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Affiliation(s)
- Aki Kohyama
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Rei Yokoyama
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Kiyoshi Tsuge
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Yuji Matsuya
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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16
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Gupta S, Kumar A, Tejavath KK. A pharmacognostic approach for mitigating pancreatic cancer: emphasis on herbal extracts and phytoconstituents. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2021. [DOI: 10.1186/s43094-021-00246-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Abstract
Background
Pancreatic cancer is studied as one of the most lethal cancers with currently no control of its lethality, mainly due to its late diagnosis and lack of foolproof treatment processes. Despite continuous efforts being made in looking for therapies to deal with cancer, it keeps on being a labyrinth for the researchers. Efforts like discovering new treatment options, repurposing existing drugs, are continuously made to deal with this cancer.
Main body
With the urge to get answers and the fact that nature has all roots of therapeutics, efforts are made in the direction of finding those answers for providing ministrations for pancreatic cancer from plant products. Plant products are used as treatment options either directly in the form of extracts or an alternative to them is individual phytochemicals that are either isolated from the plants or are commercially synthesized for various purposes. In this review, we put forward such pharmacognostic initiatives made in combating pancreatic cancer, focusing mainly on plant extracts and various phytochemicals; along with the mechanisms which they triggered to fulfill the need for cytotoxicity to pancreatic cancer cells (in vitro and in vivo).
Conclusion
This study will thus provide insights into new combination therapy that can be used and also give a clue on which plant product and phytoconstituent can be used in dealing with pancreatic cancer.
Graphical abstract
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17
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Liu YF, Yu SS. Survey of natural products reported by Asian research groups in 2020. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:1115-1134. [PMID: 34825847 DOI: 10.1080/10286020.2021.2004131] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/04/2021] [Accepted: 11/04/2021] [Indexed: 06/13/2023]
Abstract
The new natural products reported in 2020 in peer-reviewed articles in journals with good reputations were reviewed and analyzed. The advances made by Asian research groups in the field of natural products chemistry in 2020 were summarized. Compounds with unique structural features and/or promising bioactivities originating from Asian natural sources were discussed based on their structural classification.
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Affiliation(s)
- Yan-Fei Liu
- 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
| | - Shi-Shan Yu
- 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
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18
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Sun S, Kim MJ, Omar AM, Duy Phan N, Aoike M, Awale S. GDP Induces PANC-1 Human Pancreatic Cancer Cell Death Preferentially under Nutrient Starvation by Inhibiting PI3K/Akt/mTOR/Autophagy Signaling Pathway. Chem Biodivers 2021; 18:e2100389. [PMID: 34213070 DOI: 10.1002/cbdv.202100389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 07/01/2021] [Indexed: 01/26/2023]
Abstract
Pancreatic tumors are hypovascular, which leads to a poor nutrient supply to support the aggressively proliferating tumor cells. However, human pancreatic cancer cells have extreme resistance to nutrition starvation, which enables them to survive under severe metabolic stress conditions within the tumor microenvironment, a phenomenon known as "austerity" in cancer biology. Discovering agents which can preferentially inhibit the cancer cells' ability to tolerate starvation conditions represents a new generation of anticancer agents. In this study, geranyl 2,4-dihydroxy-6-phenethylbenzoate (GDP), isolated from Boesenbergia pandurata rhizomes, exhibited potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrition starvation conditions. GDP also possessed PANC-1 cell migration and colony formation inhibitory activities under normal nutrient-rich conditions. Mechanistically, GDP inhibited PI3K/Akt/mTOR/autophagy survival signaling pathway, leading to selective PANC-1 cancer cell death under the nutrition starvation condition. Therefore, GDP is a promising anti-austerity agent for drug development against pancreatic cancer.
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Affiliation(s)
- Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Mio Aoike
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
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19
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Deng LM, Hu LJ, Bai YTZ, Wang J, Qin GQ, Song QY, Su JC, Huang XJ, Jiang RW, Tang W, Li YL, Li CC, Ye WC, Wang Y. Rhodomentosones A and B: Two Pairs of Enantiomeric Phloroglucinol Trimers from Rhodomyrtus tomentosa and Their Asymmetric Biomimetic Synthesis. Org Lett 2021; 23:4499-4504. [PMID: 34032453 DOI: 10.1021/acs.orglett.1c01616] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Rhodomentosones A and B (1 and 2), two pairs of novel enantiomeric phloroglucinol trimers featuring a unique 6/5/5/6/5/5/6-fused ring system were isolated from Rhodomyrtus tomentosa. Their structures with absolute configurations were elucidated by NMR spectroscopy, X-ray crystallography, and ECD calculation. The bioinspired syntheses of 1 and 2 were achieved in six steps featuring an organocatalytic asymmetric dehydroxylation/Michael addition/Kornblum-DeLaMare rearrangement/ketalization cascade reaction. Compounds 1 and 2 exhibited promising antiviral activities against respiratory syncytial virus (RSV).
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Affiliation(s)
- Lu-Ming Deng
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Li-Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yang-Ting-Zhi Bai
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jie Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Guan-Qiu Qin
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Qiao-Yun Song
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jun-Cheng Su
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiao-Jun Huang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ren-Wang Jiang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wei Tang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yao-Lan Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Chuang-Chuang Li
- Department of Chemistry, Southern University of Science & Technology, Shenzhen 518055, People's Republic of China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
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20
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Maneenet J, Omar AM, Sun S, Kim MJ, Daodee S, Monthakantirat O, Boonyarat C, Chulikhit Y, Awale S. Benzylisoquinoline alkaloids from Nelumbo nucifera Gaertn. petals with antiausterity activities against the HeLa human cervical cancer cell line. Z NATURFORSCH C 2021; 76:401-406. [PMID: 34019754 DOI: 10.1515/znc-2020-0304] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 05/02/2021] [Indexed: 11/15/2022]
Abstract
Ethanolic extract of Nelumbo nucifera petals showed preferential cytotoxic activity against HeLa human cervical cancer cell line with a PC50 value of 10.4 μg/mL. This active extract was subjected to a phytochemical investigation study which led to the isolation of nine benzylisoquinoline alkaloids (1-9). The isolated compounds exhibited potent antiausterity activities. Moreover, under nutrient-deprived conditions, (-)-lirinidine (8) induced remarkable alterations in HeLa cell morphology including cell shrinkage and plasma blebbing leading to total cell death within 10 h. Mechanistically, 8 was found to inhibit Akt/mTOR signaling pathway. It also induced apoptosis by promoting caspase-3 activation and inhibiting Bcl-2 expression. Therefore, benzylisoquinoline alkaloids skeleton can be considered as a promising scaffold for the anticancer drug development against cervical cancer.
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Affiliation(s)
- Juthamart Maneenet
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan.,Graduate School of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Supawadee Daodee
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Orawon Monthakantirat
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Chantana Boonyarat
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Yaowared Chulikhit
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Japan
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21
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Sun S, Dibwe DF, Kim MJ, Omar AM, Phan ND, Fujino H, Pongterdsak N, Chaithatwatthana K, Phrutivorapongkul A, Awale S. A new anti-austerity agent, 4'-O-methylgrynullarin from Derris scandens induces PANC-1 human pancreatic cancer cell death under nutrition starvation via inhibition of Akt/mTOR pathway. Bioorg Med Chem Lett 2021; 40:127967. [PMID: 33753259 DOI: 10.1016/j.bmcl.2021.127967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/04/2021] [Accepted: 03/11/2021] [Indexed: 10/21/2022]
Abstract
An ethanolic extract of Derris scandens flowers showed potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrient-deprived condition, with a PC50 value of 0.7 μg/mL. Phytochemical investigation of this active extract led to the isolation of four prenylated isoflavones (1-4) including a new compound named 4'-O-methylgrynullarin (1). The structure elucidation of the new compound was achieved by HRFABMS and NMR spectroscopic analysis. The isolated compounds exhibited potent anti-austerity activity against four different human pancreatic cancer cell lines under nutrient-deprived conditions. The new compound 4'-O-methylgrynullarin (1) was also found to inhibit PANC-1 cell migration and colony formation under nutrient-rich condition. Mechanistically, compound 1 inhibited key survival proteins in the Akt/mTOR signaling pathway. Therefore, 4'-O-methylgrynullarin (1) can be considered as a potential lead compound for the anticancer drug development based on the anti-austerity strategy.
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Affiliation(s)
- Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Dya Fita Dibwe
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Haruka Fujino
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | | | | | | | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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Shinzawa K, Kageta D, Nash RJ, Fleet GW, Imahori T, Kato A. Azobenzene derivatives show anti-cancer activity against pancreatic cancer cells only under nutrient starvation conditions via G0/G1 cell cycle arrest. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Sun S, Omar AM, Kim MJ, Phan ND, Chulikhit Y, Awale S. Chemical constituents of Thai Piper ribesoides and their antiausterity activities against the PANC-1 human pancreatic cancer cell line. Fitoterapia 2021; 151:104901. [PMID: 33794305 DOI: 10.1016/j.fitote.2021.104901] [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: 02/05/2021] [Revised: 03/24/2021] [Accepted: 03/24/2021] [Indexed: 10/21/2022]
Abstract
A methanolic extract of Thai Piper ribesoides showed preferential cytotoxicity against PANC-1 human pancreatic cancer cells under a nutrient-deprived condition, with a PC50 value of 24 μg/mL. Phytochemical investigation of this bio-active extract led to the isolation of six compounds (1-6), including two new polyoxygenated cyclohexane derivatives, named ribesoidones A and B (1 and 2). The structural elucidation of the new compounds was achieved by a combination of HREIMS, NMR, and circular dichroism spectroscopic analyses. Isolated compounds were tested for their antiausterity activity against PANC-1 human pancreatic cancer cell line. Among these, compounds 1, 3, and 4 displayed potent preferential cytotoxic activity with PC50 values of 5.5-7.2 μM. Ribesoidone A (1) was also found to inhibit PANC-1 colony formation under normal nutrient-rich conditions.
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Affiliation(s)
- Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Yaowared Chulikhit
- Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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24
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25
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Fayez S, Cacciatore A, Sun S, Kim M, Aké Assi L, Feineis D, Awale S, Bringmann G. Ancistrobrevidines A-C and related naphthylisoquinoline alkaloids with cytotoxic activities against HeLa and pancreatic cancer cells, from the liana Ancistrocladus abbreviatus. Bioorg Med Chem 2020; 30:115950. [PMID: 33383442 DOI: 10.1016/j.bmc.2020.115950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/08/2020] [Accepted: 12/09/2020] [Indexed: 01/28/2023]
Abstract
From the leaves of Ancistrocladus abbreviatus (Ancistrocladaceae), six 5,1'-coupled naphthyldihydroisoquinoline alkaloids were isolated, ancistrobrevidines A-C (5-7), 5-epi-dioncophyllidine C2 (10), 6-O-methylhamatinine (8), and 6-O-methylancistectorine A3 (9); the two latter compounds were already known from related plants. Most strikingly, this series comprises alkaloids belonging to three different subclasses of naphthylisoquinolines. Ancistrobrevidine C (7) and the alkaloids 8 and 9, displaying the S-configuration at C-3 and an oxygen function at C-6, are three further representatives of the large subgroup of 5,1'-coupled Ancistrocladaceae-type compounds found in nature. 5-epi-Dioncophyllidine C2 (10), lacking an oxygen function at C-6 and having the R-configuration at C-3, is only the third representative of a 5,1'-linked Dioncophyllaceae-type naphthylisoquinoline. Likewise rare are 5,1'-coupled hybrid-type alkaloids, which are 6-oxygenated and 3R-configured. The ancistrobrevidines A (5) and B (6) are the only second and third examples of such 5,1'-linked naphthylisoquinolines in Ancistrocladus species showing the landmarks of both, Ancistrocladaceae- and Dioncophyllaceae-type naphthylisoquinolines. In the roots of A. abbreviatus, two further unprecedented 5,1'-coupled alkaloids were discovered, ancistrobreviquinones A (11) and B (12), consisting of a 3,4-naphthoquinone portion coupled to a tetrahydroisoquinoline subunit. They are the very first quinoid naphthylisoquinolines possessing an ortho-diketone entity. Ancistrobrevidine C (7) exerted pronounced antiproliferative activities against HeLa cervical cancer cells and preferential cytotoxicity towards PANC-1 human pancreatic cancer cells under nutrient-deprived conditions following the antiausterity approach. Moreover, 7 suppressed the migration of PANC-1 cells and significantly inhibited colony formation under nutrient-rich conditions in a concentration-dependent manner, and induced dramatic alteration in cell morphology, leading to cell death.
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Affiliation(s)
- Shaimaa Fayez
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany; Department of Pharmacognosy, Faculty of Pharmacy, Ain-Shams University, Organization of African Unity Street 1, 11566 Cairo, Egypt
| | - Alessia Cacciatore
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Sijia Sun
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Minjo Kim
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Laurent Aké Assi
- Centre National de Floristique, Conservatoire et Jardin Botaniques, Université d' Abidjan, Abidjan 08, Cote d'Ivoire
| | - Doris Feineis
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany.
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