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Zhang M, Zhu X. Computational investigation of flavonol-based GLP-1R agonists using DFT calculations and molecular docking. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.113005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Atiq A, Parhar I. Anti-neoplastic Potential of Flavonoids and Polysaccharide Phytochemicals in Glioblastoma. Molecules 2020; 25:E4895. [PMID: 33113890 PMCID: PMC7660188 DOI: 10.3390/molecules25214895] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/09/2020] [Accepted: 10/14/2020] [Indexed: 02/07/2023] Open
Abstract
Clinically, gliomas are classified into four grades, with grade IV glioblastoma multiforme being the most malignant and deadly, which accounts for 50% of all gliomas. Characteristically, glioblastoma involves the aggressive proliferation of cells and invasion of normal brain tissue, outcomes as poor patient prognosis. With the current standard therapy of glioblastoma; surgical resection and radiotherapy followed by adjuvant chemotherapy with temozolomide, it remains fatal, because of the development of drug resistance, tumor recurrence, and metastasis. Therefore, the need for the effective therapeutic option for glioblastoma remains elusive. Previous studies have demonstrated the chemopreventive role of naturally occurring pharmacological agents through preventing or reversing the initiation phase of carcinogenesis or arresting the cancer progression phase. In this review, we discuss the role of natural phytochemicals in the amelioration of glioblastoma, with the aim to improve therapeutic outcomes, and minimize the adverse side effects to improve patient's prognosis and enhancing their quality of life.
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Affiliation(s)
- Ayesha Atiq
- Brain Research Institute Monash Sunway (BRIMS), Jeffery Cheah School of Medicine, Monash University Malaysia, 47500 Bandar Sunway, Selangor, Malaysia;
| | - Ishwar Parhar
- Brain Research Institute Monash Sunway (BRIMS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500 Bandar Sunway, Selangor, Malaysia
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Huang J, Tao G, Liu J, Cai J, Huang Z, Chen JX. Current Prevention of COVID-19: Natural Products and Herbal Medicine. Front Pharmacol 2020; 11:588508. [PMID: 33178026 PMCID: PMC7597394 DOI: 10.3389/fphar.2020.588508] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/18/2020] [Indexed: 12/20/2022] Open
Abstract
Starting from December 2019, novel coronavirus disease 2019 (COVID-19) pandemic has caused tremendous economic loss and unprecedented health crisis across the globe. While the development of cure is at full speed, less attention and fewer effort have been spent on the prevention of this rapidly spreading respiratory infectious disease. Although so far, several vaccine candidates have advanced into clinical trials, limited data have been released regarding the vaccine efficacy and safety in human, not mention the long-term effectiveness of those vaccines remain as open question yet. Natural products and herbal medicines have been historically used for acute respiratory infection and generally show acceptable toxicity. The favorable stability for oral formulation and ease of scaling up manufacture make it ideal candidate for prophylactic. Hereby, we summarized the most recent advance in SARS-CoV-2 prevention including vaccine development as well as experimental prophylactics. Mainly, we reviewed the natural products showing inhibitory effect on human coronavirus, and discussed the herbal medicines lately used for COVID-19, especially focused on the herbal products already approved by regulatory agency with identifiable patent number. We demonstrated that to fill in the response gap between appropriate treatment and commercially available vaccine, repurposing natural products and herbal medicines as prophylactic will be a vigorous approach to stop or at least slow down SARS-CoV-2 transmission. In the interest of public health, this will lend health officials better control on the current pandemic.
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Affiliation(s)
- Junqing Huang
- Formula-pattern Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou, China
| | - Gabriel Tao
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, United States
| | - Jingwen Liu
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, United States
| | - Junming Cai
- Department of Biomedical Engineering, Henry Samueli School of Engineering, University of California, Irvine, Irvine, CA, United States
| | - Zhongyu Huang
- Formula-pattern Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou, China
| | - Jia-xu Chen
- Formula-pattern Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou, China
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
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Tsolmon B, Fang Y, Yang T, Guo L, He K, Li GY, Zhao H. Structural identification and UPLC-ESI-QTOF-MS 2 analysis of flavonoids in the aquatic plant Landoltia punctata and their in vitro and in vivo antioxidant activities. Food Chem 2020; 343:128392. [PMID: 33191012 DOI: 10.1016/j.foodchem.2020.128392] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 10/01/2020] [Accepted: 10/11/2020] [Indexed: 01/16/2023]
Abstract
Duckweeds have long been consumed as vegetables in several South Asian countries. In this study of the chemical constituents of duckweed Landoltia punctata, a new compound, apigenin 6-C-[β-D-apiofuranosyl-(1 → 2)]-β-D-glucopyranoside (1), and a previously LC-MS identified compound, quercetin 3-O-β-D-apiofuranoside (3), as well as three known compounds, luteolin 6-C-[β-D-apiofuranosyl-(1 → 2)]-β-D-glucopyranoside (2), apigenin 6-C-β-D-glucopyranoside (4), and luteolin 7-O-neohespirodise (5), were isolated and identified on the basis of MS and NMR spectroscopic analyses and chemical derivations. In total, 24 flavonoids were identified in L. punctata 0001 by UPLC-ESI-QTOF-MS2. In DPPH and ABTS assays, 3 exhibited significant antioxidant activity with IC50 values of 4.03 ± 1.31 µg/mL and 14.9 ± 2.28 µg/mL, respectively. In in vivo antioxidant activity assays, 1 significantly increased the survival rate of juglone-exposed Caenorhabditis elegans by 2 to 3-fold, and by 75% following thermal damage. Compounds 1-5 exhibited moderate scavenging capacities of intracellular reactive oxygen species in C. elegans exposed to H2O2.
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Affiliation(s)
- Bolor Tsolmon
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yang Fang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China; National Engineering Research Center for Natural Medicines, Chengdu 610041, People's Republic of China
| | - Tao Yang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Ling Guo
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Kaize He
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China; National Engineering Research Center for Natural Medicines, Chengdu 610041, People's Republic of China
| | - Guo-You Li
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.
| | - Hai Zhao
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China; National Engineering Research Center for Natural Medicines, Chengdu 610041, People's Republic of China.
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Ashraf J, Mughal EU, Sadiq A, Bibi M, Naeem N, Ali A, Massadaq A, Fatima N, Javid A, Zafar MN, Khan BA, Nazar MF, Mumtaz A, Tahir MN, Mirzaei M. Exploring 3-hydroxyflavone scaffolds as mushroom tyrosinase inhibitors: synthesis, X-ray crystallography, antimicrobial, fluorescence behaviour, structure-activity relationship and molecular modelling studies. J Biomol Struct Dyn 2020; 39:7107-7122. [DOI: 10.1080/07391102.2020.1805364] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jamshaid Ashraf
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | | | - Amina Sadiq
- Department of Chemistry, Govt. College Women University, Sialkot, Pakistan
| | - Maryam Bibi
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | - Nafeesa Naeem
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | - Anser Ali
- Department of Zoology, Mirpur University of Science and Technology, Mirpur, Pakistan
| | - Anam Massadaq
- Department of Zoology, Mirpur University of Science and Technology, Mirpur, Pakistan
| | - Nighat Fatima
- Department of Pharmacy, COMSATS University Islamabad, Abbotabad, Pakistan
| | - Asif Javid
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | | | - Bilal Ahmad Khan
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
| | | | - Amara Mumtaz
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | | | - Masoud Mirzaei
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
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56
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Fang Y, Yang C, Yu Z, Li X, Mu Q, Liao G, Yu B. Natural products as LSD1 inhibitors for cancer therapy. Acta Pharm Sin B 2020; 11:S2211-3835(20)30616-X. [PMID: 32837872 PMCID: PMC7305746 DOI: 10.1016/j.apsb.2020.06.007] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/30/2020] [Accepted: 06/08/2020] [Indexed: 02/07/2023] Open
Abstract
Natural products generally fall into the biologically relevant chemical space and always possess novel biological activities, thus making them a rich source of lead compounds for new drug discovery. With the recent technological advances, natural product-based drug discovery is now reaching a new era. Natural products have also shown promise in epigenetic drug discovery, some of them have advanced into clinical trials or are presently being used in clinic. The histone lysine specific demethylase 1 (LSD1), an important class of histone demethylases, has fundamental roles in the development of various pathological conditions. Targeting LSD1 has been recognized as a promising therapeutic option for cancer treatment. Notably, some natural products with different chemotypes including protoberberine alkaloids, flavones, polyphenols, and cyclic peptides have shown effectiveness against LSD1. These natural products provide novel scaffolds for developing new LSD1 inhibitors. In this review, we mainly discuss the identification of natural LSD1 inhibitors, analysis of the co-crystal structures of LSD1/natural product complex, antitumor activity and their modes of action. We also briefly discuss the challenges faced in this field. We believe this review will provide a landscape of natural LSD1 inhibitors.
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Key Words
- AML, acute myeloid leukemia
- CCC, cut countercurrent chromatography
- CD11b, integrin alpha M
- CD14, cluster of differentiation 14
- CD86, cluster of differentiation 86
- COVID-19, coronavirus disease
- Cancer therapy
- CoREST, RE1-silencing transcription factor co-repressor
- Drug discovery
- EMT, epithelial–mesenchymal transition
- EVOO, extra virgin olive oil
- EdU, 5-ethynyl-20-deoxyuridine
- Epigenetic regulation
- FAD, flavin adenine dinucleotide
- FDA, U.S. Food and Drug Administration
- GGA, geranylgeranoic acid
- H3K4, histone H3 lysine 4
- H3K9, histone H3 lysine 9
- HDAC, histone deacetylase
- HRP, horseradish peroxidase
- Histone demethylase
- Kt, competitive inhibition constant
- LSD1 inhibitors
- LSD1, lysine-specific histone demethylase 1A
- MAO-A, monoamine oxidase A
- MHC, myosin heavy chain
- MMA, methylmalonic acid
- NAD, nicotinamide adenine dinucleotide
- NTRK2, neurotrophic receptor tyrosine kinase 2
- Natural products
- PDX, patient-derived xenograft
- SARS-CoV-2, severe acute respiratory syndrome coronavirus 2
- SARs, structure–activity relationship studies
- SIRT1, sirtuin 1
- SOX2, sex determining region Y-box 2
- SPR, surface plasmon resonance
- TCP, tranylcypromine
- THF, tetrahydrofolate
- Tm, melting temperature
- iPS, induced pluripotent stem
- mRNA, messenger RNA
- siRNA, small interfering RNA
- ΔΨm, mitochondrial transmembrane potential
- α-MG, α-mangostin
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Affiliation(s)
- Yuan Fang
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Chao Yang
- Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan 316022, China
| | - Zhiqiang Yu
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Xiaochuan Li
- The People's Hospital of Gaozhou, Gaozhou 525200, China
| | - Qingchun Mu
- The People's Hospital of Gaozhou, Gaozhou 525200, China
| | - Guochao Liao
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Bin Yu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
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57
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Santos R, Pinto D, Magalhães C, Silva A. Halogenated Flavones and Isoflavones: A State-of-Art on their Synthesis. Curr Org Synth 2020; 17:415-425. [PMID: 32473000 DOI: 10.2174/1570179417666200530213737] [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: 02/26/2020] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Flavonoid is a family of compounds present in the everyday consumption plants and fruits, contributing to a balanced diet and beneficial health effects. Being a scaffold for new drugs and presenting a wide range of applicability in the treatment of illnesses give them also an impact in medicine. Among the several types of flavonoids, flavone and isoflavone derivatives can be highlighted due to their prevalence in nature and biological activities already established. The standard synthetic route to obtain both halogenated flavones and isoflavones is through the use of already halogenated starting materials. Halogenation of the flavone and isoflavone core is less common because it is more complicated and involves some selectivity issues. OBJECTIVE Considering the importance of these flavonoids, we aim to present the main and more recent synthetic approaches towards their halogenation. METHODS The most prominent methodologies for the synthesis of halogenated flavones and isoflavones were reviewed. A careful survey of the reported data, using mainly the Scopus database and halogenation, flavones and isoflavones as keywords, was conducted. RESULTS Herein, a review is provided on the latest and more efficient halogenation protocols of flavones and isoflavones. Selective halogenation and the greener methodologies, including enzymatic and microbial halogenations, were reported. Nevertheless, some interesting protocols that allowed the synthesis of halogenated flavone and isoflavone derivatives in specific positions using halogenated reagents are also summarized. CONCLUSION Halogenated flavones and isoflavones have risen as noticeable structures; however, most of the time, the synthetic procedures involve toxic reagents and harsh reaction conditions. Therefore, the development of new synthetic routes with low environmental impact is desirable.
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Affiliation(s)
- Ricardo Santos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Diana Pinto
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Clara Magalhães
- Department of Chemistry and CICECO, Universidade de Aveiro, Aveiro, Portugal
| | - Artur Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
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58
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Polymethoxyselenoflavones exert anti-obesity effects through activation of lipolysis and brown adipocyte metabolism. Int J Obes (Lond) 2020; 45:122-129. [PMID: 32467614 DOI: 10.1038/s41366-020-0606-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/17/2020] [Accepted: 05/14/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND/OBJECTIVES Polymethoxyselenoflavone (PMSF) is a compound that substitutes the oxygen atom in a flavonoid with selenium. This study aimed to investigate the effects of PMSFs on lipid metabolism in adipocytes and their anti-obesity potential. SUBJECTS/METHODS To test lipolytic and thermogenic effects of the compounds in vitro, adipocytes differentiated from immortalized pre-brown adipocyte progenitors and pre-white adipocyte cell lines were treated with 19 PMSFs. The expression levels of brown adipocyte markers and genes related to mitochondrial metabolism were analyzed by qPCR and western blot. In vivo anti-obesity effect was investigated using diet-induced obesity mouse models and adipocyte-specific ATGL knockout mice. RESULTS The qPCR analysis identified 2-(3,4-dimethoxyphenyl)-4H-selenochromen-4-one (DMPSC) as the most potent brown adipogenic candidate among the 19 compounds tested in this study. DMPSC treatment significantly increased the mitochondrial content and oxidative metabolism in adipocytes in vitro. Mechanistically, DMPSC treatment increased lipolysis through activation of PKA downstream signaling. Consistently, the in vivo treatment of DMPSC increased energy consumption, reduced body weight, and improved glucose tolerance in mice fed with high-fat diets. Moreover, DMPSC treatment increased brown adipocyte marker expression and mitochondrial content in adipose tissue of mice. The anti-obesity effects were absent in adipocyte-specific ATGL knockout mice, indicating that the DMPSC effect is mediated by cytosolic lipase-dependent mechanisms. CONCLUSIONS Collectively, our results indicated that DMPSC exerted anti-obesity effects partially through the PKA signaling-mediated activation of lipolysis and brown adipose tissue metabolism.
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59
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Bioavailability and antioxidant potentials of fresh and pasteurized kiwi juice before and after in vitro gastrointestinal digestion. Journal of Food Science and Technology 2020; 57:4277-4285. [PMID: 33071349 DOI: 10.1007/s13197-020-04467-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 10/24/2019] [Accepted: 04/23/2020] [Indexed: 01/22/2023]
Abstract
The aim of the present work was to find the changes in the chemical composition, chemical structure and antioxidant activity of bioactive nutrients of kiwi juices upon pasteurization and in vitro gastrointestinal digestion. Results showed that fresh kiwi juice (FKJ) contains total phenols, 162 mg GAE/mL, total flavonoids 1.44 mg QE/mL, ascorbic acid 4.5 mg/mL and fiber 60%; these contents were marginally affected by pasteurization (PKJ) to be 122, 1.02, 2.6 and 47 respectively. On the other hand, gastrointestinal digestion severely lowered total phenols, total flavonoids and ascorbic acid in digested fresh kiwi juice (DFKJ) to 49 mg GAE/mL,0.16 mg GE/mL and 2.2 mg/mL, and in digested pasteurized kiwi juice (DPKJ) to 42, 0.07 and 1.2 respectively; however fiber contents increased upon digestion as a result of decreasing other nutrients. The antioxidant and reducing power activities followed the same order of decreasing total phenols, total flavonoids and ascorbic acid contents i.e. FKJ > PKJ > DFKJ > DPKJ. The major flavonoid found was apigenin in the form of various glycosides differ in the number (1-3) and position of the sugar units. Pasteurization showed minor effects on the chemical composition of fresh juice while digestion, as a result of gastrointestinal enzymes had more effect but mainly on the number and position of the sugar units rather than affecting the flavonoid moiety which preserve the main nutritive values.
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60
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Thorat NM, Sarkate AP, Lokwani DK, Tiwari SV, Azad R, Thopate SR. N-Benzylation of 6-aminoflavone by reductive amination and efficient access to some novel anticancer agents via topoisomerase II inhibition. Mol Divers 2020; 25:937-948. [PMID: 32249379 DOI: 10.1007/s11030-020-10079-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 03/23/2020] [Indexed: 01/07/2023]
Abstract
Series of novel N-benzyl derivatives of 6-aminoflavone (9a-n) were synthesized and evaluated for anticancer and topoisomerase II enzyme inhibition activity. All the synthesized compounds were screened for in vitro anticancer activity against human breast cancer cell line (MCF-7) and human lung cancer cell line (A-549). Among the synthesized compounds, 9f and 9g were found to be the most potent anticancer agents against human breast cancer cell line (MCF-7) with IC50 values of 9.35 µM and 9.58 µM, respectively. Compounds 9b, 9c and 9n exhibited promising anticancer activity against human lung cancer cell line (A-549) with 43.71%, 46.48% and 44.26% inhibition at the highest concentration of 10 µM, respectively. Compounds 9c, 9f and 9g have ability to inhibit the topoisomerase II enzyme. Compound 9f showed most potent topoisomerase II enzyme inhibition activity with IC50 value of 12.11 µM. Further, these compounds have a high potential to be developed as a promising topoisomerase II inhibitors.
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Affiliation(s)
- Nitin M Thorat
- Department of Chemistry, Prof. John Barnabas Post Graduate School for Biological Studies, Ahmednagar College, Ahmednagar, Station Road, Ahmednagar, Maharashtra, 414001, India.,Department of Chemistry, Maharaja Jivajirao Shinde Arts, Science, Commerce College, Shrigonda, Maharashtra, 413701, India
| | - Aniket P Sarkate
- Department of Chemical Technology, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, Maharashtra, 431004, India
| | - Deepak K Lokwani
- Department of Pharmaceutical Chemistry, R.C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra, 425405, India
| | - Shailee V Tiwari
- Department of Pharmaceutical Chemistry, Durgamata Institute of Pharmacy, Dharmapuri, Parbhani, Maharashtra, 431401, India
| | - Rajaram Azad
- Department of Animal Biology, University of Hyderabad, Hyderabad, 500046, India
| | - Shankar R Thopate
- Department of Chemistry, Prof. John Barnabas Post Graduate School for Biological Studies, Ahmednagar College, Ahmednagar, Station Road, Ahmednagar, Maharashtra, 414001, India. .,Department of Chemistry, Shri Sadguru Gangageer Maharaj Science, Gautam Arts and Sanjivani Commerce College, Kopargaon, Dist. Ahmednagar, Maharashtra, 423 601, India.
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Flavone-based arylamides as potential anticancers: Design, synthesis and in vitro cell-based/cell-free evaluations. Eur J Med Chem 2020; 187:111965. [DOI: 10.1016/j.ejmech.2019.111965] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/10/2019] [Accepted: 12/10/2019] [Indexed: 12/24/2022]
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62
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Lakshmi PK, Markandeya SV, Sridhar C, Babu K R. MnCl
2
‐Mediated Carbonylative Sonogashira Coupling of Aryl Iodides and Aromatic Terminal Alkynes by Using CO. ChemistrySelect 2019. [DOI: 10.1002/slct.201903132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Parvathi K. Lakshmi
- Department of Medicinal ChemistryGVK Biosciences Pvt. Ltd., IDA Mallapur, Hyderabad Telangana India
- Department of Engineering ChemistryAndhra University, Visakhapatnam Andhra Pradesh India
| | - Sarma V. Markandeya
- Department of Medicinal ChemistryGVK Biosciences Pvt. Ltd., IDA Mallapur, Hyderabad Telangana India
- Department of Engineering ChemistryAndhra University, Visakhapatnam Andhra Pradesh India
| | - Chidara Sridhar
- Department of Medicinal ChemistryGVK Biosciences Pvt. Ltd., IDA Mallapur, Hyderabad Telangana India
| | - Raghu Babu K
- Department of Engineering ChemistryAndhra University, Visakhapatnam Andhra Pradesh India
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63
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Ali HM, Ali IH. Structure-antioxidant activity relationships, QSAR, DFT calculation, and mechanisms of flavones and flavonols. Med Chem Res 2019. [DOI: 10.1007/s00044-019-02452-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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64
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Yin J, Ma Y, Liang C, Wang H, Sun Y, Zhang L, Jia Q. A Complete Study of Farrerol Metabolites Produced in Vivo and in Vitro. Molecules 2019; 24:E3470. [PMID: 31554336 PMCID: PMC6804004 DOI: 10.3390/molecules24193470] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/20/2019] [Accepted: 09/23/2019] [Indexed: 01/01/2023] Open
Abstract
Although farrerol, a characteristically bioactive constituent of Rhododendron dauricum L., exhibits extensive biological and pharmacological activities (e.g., anti-oxidant, anti-immunogenic, and anti-angiogenic) as well as a high drug development potential, its metabolism remains underexplored. Herein, we employed ultra-high performance liquid chromatography/quadrupole time-of-flight mass spectrometry coupled with multiple data post-processing techniques to rapidly identify farrerol metabolites produced in vivo (in rat blood, bile, urine and feces) and in vitro (in rat liver microsomes). As a result, 42 in vivo metabolites and 15 in vitro metabolites were detected, and farrerol shown to mainly undergo oxidation, reduction, (de)methylation, glucose conjugation, glucuronide conjugation, sulfate conjugation, N-acetylation and N-acetylcysteine conjugation. Thus, this work elaborates the metabolic pathways of farrerol and reveals the potential pharmacodynamics forms of farrerol.
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Affiliation(s)
- Jintuo Yin
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, Hebei, 050017, China.
| | - Yinling Ma
- National Clinical Drug Monitoring Center, Department of Pharmacy, Hebei Province General Center, Shijiazhuang 050051, China.
| | - Caijuan Liang
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, Hebei, 050017, China.
| | - Hairong Wang
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, Hebei, 050017, China.
| | - Yupeng Sun
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, Hebei, 050017, China.
| | - Lantong Zhang
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, Hebei, 050017, China.
| | - Qingzhong Jia
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, 050017, China.
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Vimal M, Pathak U, Halve AK. Water-mediated phosphorylative cyclodehydrogenation: An efficient preparation of flavones and flavanones. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1643484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Manorama Vimal
- Synthetic Chemistry Division, Defence Research Development Establishment, Gwalior, MP, India
| | - Uma Pathak
- Synthetic Chemistry Division, Defence Research Development Establishment, Gwalior, MP, India
| | - Anand Kumar Halve
- School of Studies in Chemistry, Jiwaji University, Gwalior, MP, India
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66
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Chen X, Tang WJ, Shi JB, Liu MM, Liu XH. Therapeutic strategies for targeting telomerase in cancer. Med Res Rev 2019; 40:532-585. [PMID: 31361345 DOI: 10.1002/med.21626] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/12/2019] [Accepted: 07/16/2019] [Indexed: 12/13/2022]
Abstract
Telomere and telomerase play important roles in abnormal cell proliferation, metastasis, stem cell maintenance, and immortalization in various cancers. Therefore, designing of drugs targeting telomerase and telomere is of great significance. Over the past two decades, considerable knowledge regarding telomere and telomerase has been accumulated, which provides theoretical support for the design of therapeutic strategies such as telomere elongation. Therefore, the development of telomere-based therapies such as nucleoside analogs, non-nucleoside small molecules, antisense technology, ribozymes, and dominant negative human telomerase reverse transcriptase are being prioritized for eradicating a majority of tumors. While the benefits of telomere-based therapies are obvious, there is a need to address the limitations of various therapeutic strategies to improve the possibility of clinical applications. In this study, current knowledge of telomere and telomerase is discussed, and therapeutic strategies based on recent research are reviewed.
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Affiliation(s)
- Xing Chen
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Wen-Jian Tang
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Jing Bo Shi
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Ming Ming Liu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
| | - Xin-Hua Liu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, People's Republic of China
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67
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Perrone S, Troisi L, Salomone A. Heterocycle Synthesis through Pd-Catalyzed Carbonylative Coupling. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900439] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Serena Perrone
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali; Università del Salento; Campus Ecotekne, Prov.le Lecce-Monteroni 73100 Lecce Italy
| | - Luigino Troisi
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali; Università del Salento; Campus Ecotekne, Prov.le Lecce-Monteroni 73100 Lecce Italy
| | - Antonio Salomone
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali; Università del Salento; Campus Ecotekne, Prov.le Lecce-Monteroni 73100 Lecce Italy
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68
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Chen S, Elzaki MEA, Ding C, Li ZF, Wang J, Zeng RS, Song YY. Plant allelochemicals affect tolerance of polyphagous lepidopteran pest Helicoverpa armigera (Hübner) against insecticides. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 154:32-38. [PMID: 30765054 DOI: 10.1016/j.pestbp.2018.12.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 12/10/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
Cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is a polyphagous lepidopteran pest distributed worldwide with a broad spectrum of host plants. However, the mechanism of H. armigera adaptation to various insecticides and defensive allelochemicals in its host plants is not fully understood. Therefore, this study examined the influence of consumption of plant allelochemicals on larval tolerance to methomyl and chlorpyrifos insecticides in H. armigera and its possible mechanism. Twelve plant allelochemicals were screened to evaluate their effects on larval sensitivity to methomyl. Of which flavone, coumarin, DIMBOA (2,4-Dihydroxy-7-methoxy-1,4-benzoxazin-3-one) and visnagin significantly reduced larval sensitivity to methomyl. Application of cytochrome P450 inhibitor piperonyl butoxide (PBO) significantly increased the mortality of methomyl-treated larvae. In contrast, PBO addition significantly decreased the mortality of chlorpyrifos-treated larvae. Moreover, allelochemical consumption enhanced the activities of glutathione S-transferase, carboxylesterase, cytochrome P450 and acetylcholinesterase in the midgut and fat body. The qRT-PCR analysis confirms that P450 genes, CYP6B2, CYP6B6 and CYP6B7 were induced by the four allelochemicals in the midguts and the fat bodies. In conclusion, the generalist H. armigera can take benefit of plant allelochemicals from its host plants to elaborate its defense against insecticides.
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Affiliation(s)
- Shi Chen
- College of Natural Resources and Environment, South China Agricultural University, Wushan, Guangzhou 510642, China; College of Materials and Energy, South China Agricultural University, Wushan, Guangzhou 510642, China
| | - Mohammed Esmail Abdalla Elzaki
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Jinshan, Fuzhou 350002, China
| | - Chaohui Ding
- College of Natural Resources and Environment, South China Agricultural University, Wushan, Guangzhou 510642, China
| | - Zheng-Fang Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Jinshan, Fuzhou 350002, China
| | - Jie Wang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Jinshan, Fuzhou 350002, China
| | - Ren-Sen Zeng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Jinshan, Fuzhou 350002, China.
| | - Yuan-Yuan Song
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Jinshan, Fuzhou 350002, China.
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69
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Song X, Wen X, He J, Zhao H, Li S, Wang M. Phytochemical components and biological activities of Artemisia argyi. J Funct Foods 2019. [DOI: 10.1016/j.jff.2018.11.029] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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70
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Liu Y, Jing SX, Luo SH, Li SH. Non-volatile natural products in plant glandular trichomes: chemistry, biological activities and biosynthesis. Nat Prod Rep 2019; 36:626-665. [PMID: 30468448 DOI: 10.1039/c8np00077h] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The investigation methods, chemistry, bioactivities, and biosynthesis of non-volatile natural products involving 489 compounds in plant glandular trichomes are reviewed.
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Affiliation(s)
- Yan Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- P. R. China
| | - Shu-Xi Jing
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- P. R. China
| | - Shi-Hong Luo
- College of Bioscience and Biotechnology
- Shenyang Agricultural University
- Shenyang
- P. R. China
| | - Sheng-Hong Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- P. R. China
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71
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Old age-associated phenotypic screening for Alzheimer's disease drug candidates identifies sterubin as a potent neuroprotective compound from Yerba santa. Redox Biol 2018; 21:101089. [PMID: 30594901 PMCID: PMC6309122 DOI: 10.1016/j.redox.2018.101089] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 12/18/2018] [Accepted: 12/19/2018] [Indexed: 12/11/2022] Open
Abstract
Alzheimer's disease (AD) is the most frequent age-associated dementia with no treatments that can prevent or slow its progression. Since age is by far the major risk factor for AD, there is a strong rationale for an alternative approach to drug discovery based upon the biology of aging. Phenotypic screening assays that reflect multiple, age-associated neurotoxicity pathways rather than single molecular targets can identify compounds that have therapeutic efficacy by targeting aspects of aging that contribute to AD pathology. And, while the suitability of any single assay can be questioned, a combination of assays can make reliable predictions about the neuroprotective effects of compounds in vivo. Therefore, our lab has developed a combination of phenotypic screening assays that are ideally suited not only to identify novel neuroprotective compounds for the treatment of AD but also their target pathways, thereby potentially providing new therapeutic targets for disease treatment. Using these assays, we screened a large library of extracts from plants with identified pharmacological uses. Analysis of one of these extracts from the plant Yerba santa (Eriodictyon californicum) identified the flavanone sterubin as the active component and further studies showed it to be a potent neuroprotective and anti-inflammatory compound. Phenotypic screening of a curated library of plant extracts identifies Yerba santa. The flavonoid sterubin is the main active component of Yerba santa. Sterubin is very neuroprotective against multiple toxicities of the aging brain. Sterubin has potent anti-inflammatory activity that is dependent on Nrf2 induction. Sterubin is also an iron chelator which could enhance its neuroprotective activity.
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Marín L, Gutiérrez-del-Río I, Entrialgo-Cadierno R, Villar CJ, Lombó F. De novo biosynthesis of myricetin, kaempferol and quercetin in Streptomyces albus and Streptomyces coelicolor. PLoS One 2018; 13:e0207278. [PMID: 30440014 PMCID: PMC6237366 DOI: 10.1371/journal.pone.0207278] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 10/29/2018] [Indexed: 01/16/2023] Open
Abstract
Flavonols are a flavonoid subfamily widely distributed in plants, including several ones of great importance in human and animal diet (apple, tomato, broccoli, onion, beans, tea). These polyphenolic nutraceuticals exert potent antimicrobial (membrane potential disruptors), antioxidant (free-radical scavengers), pharmacokinetic (CYP450 modulators), anti-inflammatory (lipoxygenase inhibitors), antiangiogenic (VEGF inhibitors) and antitumor (cyclin inhibitors) activities. Biotechnological production of these nutraceuticals, for example via heterologous biosynthesis in industrial actinomycetes, is favored since in plants these polyphenols appear as inactive glycosylated derivatives, in low concentrations or as part of complex mixtures with other polyphenolic compounds. In this work, we describe the de novo biosynthesis of three important flavonols, myricetin, kaempferol and quercetin, in the industrially relevant actinomycetes Streptomyces coelicolor and S. albus. De novo biosynthesis of kaempferol, myricetin and quercetin in actinomycetes has not been described before.
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Affiliation(s)
- Laura Marín
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias) Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Principality of Asturias, Spain
| | - Ignacio Gutiérrez-del-Río
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias) Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Principality of Asturias, Spain
| | - Rodrigo Entrialgo-Cadierno
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias) Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Principality of Asturias, Spain
| | - Claudio J. Villar
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias) Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Principality of Asturias, Spain
| | - Felipe Lombó
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias) Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Principality of Asturias, Spain
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73
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Pinto DCGA, Rahmouni N, Beghidja N, Silva AMS. Scabiosa Genus: A Rich Source of Bioactive Metabolites. MEDICINES (BASEL, SWITZERLAND) 2018; 5:E110. [PMID: 30304864 PMCID: PMC6313729 DOI: 10.3390/medicines5040110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/02/2018] [Accepted: 10/06/2018] [Indexed: 04/14/2023]
Abstract
The genus Scabiosa (family Caprifoliaceae) is considered large (618 scientific plant names of species) although only 62 have accepted Latin binominal names. The majority of the Scabiosa species are widely distributed in the Mediterranean region and some Scabiosa species are used in traditional medicine systems. For instance, Scabiosa columbaria L. is used traditionally against diphtheria while S. comosa Fisch. Ex Roem. and Schult. is used in Mongolian and Tibetan traditional medical settings to treat liver diseases. The richness of Scabiosa species in secondary metabolites such as iridoids, flavonoids and pentacyclic triterpenoids may contribute to its use in folk medicine. Details on the most recent and relevant pharmacological in vivo studies on the bioactive secondary metabolites isolated from Scabiosa species will be summarized and thoroughly discussed.
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Affiliation(s)
- Diana C G A Pinto
- Department of Chemistry and QOPNA, University of Aveiro, Campus de Santiago, 3810193 Aveiro, Portugal.
| | - Naima Rahmouni
- Department of Chemistry and QOPNA, University of Aveiro, Campus de Santiago, 3810193 Aveiro, Portugal.
- Unité de Recherche et Valorisation des Ressources Naturelles, Molécules Bioactives et Analyse Physico-Chimiques et Biologiques, Université des Frères Mentouri Constantine 1, Constantine, Algérie.
| | - Noureddine Beghidja
- Unité de Recherche et Valorisation des Ressources Naturelles, Molécules Bioactives et Analyse Physico-Chimiques et Biologiques, Université des Frères Mentouri Constantine 1, Constantine, Algérie.
| | - Artur M S Silva
- Department of Chemistry and QOPNA, University of Aveiro, Campus de Santiago, 3810193 Aveiro, Portugal.
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74
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Bam R, Chalifoux WA. One-Pot Domino Friedel-Crafts Acylation/Annulation between Alkynes and 2-Methoxybenzoyl Chlorides: Synthesis of 2,3-Disubstituted Chromen-4-one Derivatives. J Org Chem 2018; 83:9929-9938. [PMID: 29869491 DOI: 10.1021/acs.joc.8b01357] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A highly regioselective synthesis of 2,3-disubstituted chromen-4-one derivatives is accomplished from readily available internal alkynes and 2-methoxybenzoyl chlorides. The reaction proceeds via a domino intermolecular Friedel-Crafts acylation/intramolecular vinyl carbocation trapping (or oxa-Michael addition)/demethylation reaction sequence. This Lewis acid promoted method features relatively mild reaction conditions to synthesize a variety of 2,3-disubstituted chromen-4-one derivatives in one pot with up to 93% yield. The chromen-2-one (coumarin) product was obtained when 2,6-dimethoxybenzoyl chloride was used as a starting material via an electrophilic aromatic substitution/rearrangement process.
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Affiliation(s)
- Radha Bam
- Department of Chemistry , University of Nevada-Reno , 1664 North Virginia Street , Reno , Nevada 89557 , United States
| | - Wesley A Chalifoux
- Department of Chemistry , University of Nevada-Reno , 1664 North Virginia Street , Reno , Nevada 89557 , United States
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75
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Charugandla R, Vangala MS, Chidara S, Korupolu RB. Nickel catalysed carbonylative Sonogashira reaction for the synthesis of diarylalkynones and 2-substituted flavones. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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76
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Mostafavi N, Ebrahimi A. The role of chlorine substituents in lichexanthones properties: the ionic and halogen bond interactions. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2294-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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77
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Carbonylative Sonogashira annulation sequence: One-pot synthesis of 4-quinolone and 4H-chromen-4-one derivatives. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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78
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Du G, Zhao Z, Chen Y, Li Z, Tian Y, Liu Z, Liu B, Song J. Quercetin protects rat cortical neurons against traumatic brain injury. Mol Med Rep 2018; 17:7859-7865. [DOI: 10.3892/mmr.2018.8801] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 06/08/2017] [Indexed: 11/06/2022] Open
Affiliation(s)
- Guoliang Du
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
| | - Zongmao Zhao
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 060000, P.R. China
| | - Yonghan Chen
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
| | - Zonghao Li
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
| | - Yaohui Tian
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
| | - Zhifeng Liu
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
| | - Bin Liu
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
| | - Jianqiang Song
- Department of Neurosurgery, Central Hospital of Cangzhou, Cangzhou, Hebei 061001, P.R. China
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79
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Meng M, Wang G, Yang L, Cheng K, Qi C. Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701469] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mengting Meng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Guofang Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Liangfeng Yang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Kai Cheng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Chenze Qi
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
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80
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Gu X, Jin Y, Dong F, Cai Y, You Z, You J, Zhang L, Du S. Toward rapid analysis, forecast and discovery of bioactive compounds from herbs by jointly using thin layer chromatography and ratiometric surface-enhanced Raman spectroscopy technique. J Pharm Biomed Anal 2018; 153:9-15. [PMID: 29459236 DOI: 10.1016/j.jpba.2018.02.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 11/25/2022]
Abstract
Conventional isolation and identification of active compounds from herbs have been extensively reported by using various chromatographic and spectroscopic techniques. However, how to quickly discover new bioactive ingredients from natural sources still remains a challenging task due to the interference of their similar structures or matrices. Here, we present a grand approach for rapid analysis, forecast and discovery of bioactive compounds from herbs based on a hyphenated strategy of thin layer chromatography and ratiometric surface-enhanced Raman spectroscopy. The performance of the hyphenated strategy is first evaluated by analyzing four protoberberine alkaloids, berberine (BER), coptisine (COP), palmatine (PAT) and jatrorrhizine (JAT), from a typical herb Coptidis Rhizoma as an example. It has been demonstrated that this coupling method can identify the four compounds by characteristic peaks at 728, 708, 736 and 732 cm-1, and especially discriminate BER and COP (with similar migration distances) by ratiometric Raman intensity (I708/I728). The corresponding limits of detection are 0.1, 0.05, 0.1 and 0.5 μM, respectively, which are about 1-2 orders of magnitude lower than those of direct observation method under 254 nm UV lamp. Based on these findings, the proposed method further guides forecast and discovery of unknown compounds from traditional Chinese herb Typhonii Rhizoma. Results infer that two trace alkaloids (BER and COP) from the n-butanol extract of Typhonii Rhizoma are found for the first time. Moreover, in vitro experiments manifest that BER can effectively decrease the viability of human glioma U87 cells by inducing cell cycle arrest in a concentration-dependent manner.
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Affiliation(s)
- Xiaoling Gu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yang Jin
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Jiangsu Province, Nanjing Medical University, Nanjing 211166,China
| | - Fang Dong
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yueqing Cai
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Zhengyi You
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Junhui You
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Liying Zhang
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Shuhu Du
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.
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81
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82
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Metal ion-improved complexation countercurrent chromatography for enantioseparation of dihydroflavone enantiomers. J Chromatogr A 2018; 1532:1-9. [DOI: 10.1016/j.chroma.2017.12.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 02/07/2023]
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83
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Ganesan K, Xu B. Telomerase Inhibitors from Natural Products and Their Anticancer Potential. Int J Mol Sci 2017; 19:ijms19010013. [PMID: 29267203 PMCID: PMC5795965 DOI: 10.3390/ijms19010013] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/10/2017] [Accepted: 12/19/2017] [Indexed: 12/25/2022] Open
Abstract
Telomeres and telomerase are nowadays exploring traits on targets for anticancer therapy. Telomerase is a unique reverse transcriptase enzyme, considered as a primary factor in almost all cancer cells, which is mainly responsible to regulate the telomere length. Hence, telomerase ensures the indefinite cell proliferation during malignancy—a hallmark of cancer—and this distinctive feature has provided telomerase as the preferred target for drug development in cancer therapy. Deactivation of telomerase and telomere destabilization by natural products provides an opening to succeed new targets for cancer therapy. This review aims to provide a fundamental knowledge for research on telomere, working regulation of telomerase and its various binding proteins to inhibit the telomere/telomerase complex. In addition, the review summarizes the inhibitors of the enzyme catalytic subunit and RNA component, natural products that target telomeres, and suppression of transcriptional and post-transcriptional levels. This extensive understanding of telomerase biology will provide indispensable information for enhancing the efficiency of rational anti-cancer drug design.
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Affiliation(s)
- Kumar Ganesan
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai 519087, China.
| | - Baojun Xu
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai 519087, China.
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84
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Energetic and electronic computation of the two-hydrogen atom donation process in catecholic and non-catecholic anthocyanidins. Food Chem 2017; 243:145-150. [PMID: 29146321 DOI: 10.1016/j.foodchem.2017.09.120] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 09/02/2017] [Accepted: 09/25/2017] [Indexed: 11/23/2022]
Abstract
Antioxidant activity of anthocyanidins is greatly affected by the 3-hydroxyl group and/or a catecholic moiety. The two-hydrogen atom donation process is frequently used to explain the high antioxidant activity of polyphenolic compounds leading to the formation of stable diketones e.g. 1,2-quinones. Thermodynamic parameters, HOMO and spin density were computed to identify the favoured path, either through the 3-hydroxyl group or through the catecholic moiety in a series of catecholic and non-catecholic 3-oxy- (and deoxy)-anthocyanidins. DFT calculations showed that the donation process in non-catecholic anthocyanidins depended on the substituents on ring B. Anthocyanidins with 3',5'-diOMe groups showed donation through 3,4'-OH or, otherwise, through 3,5-OH groups. Catecholic 3-oxyanthocyanidins, on the other hand, showed donation through the 3,4'-OH path rather than the catecholic path (4',3'-path). The 3,4'-path was favoured by the formation of planar 3-radicals in the first step and the stabilization of 4'-radicals in the second step by H-bonding with the 3'-OH group.
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85
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Bashyal B, Li L, Bains T, Debnath A, LaBarbera DV. Larrea tridentata: A novel source for anti-parasitic agents active against Entamoeba histolytica, Giardia lamblia and Naegleria fowleri. PLoS Negl Trop Dis 2017; 11:e0005832. [PMID: 28793307 PMCID: PMC5565192 DOI: 10.1371/journal.pntd.0005832] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 08/21/2017] [Accepted: 07/24/2017] [Indexed: 12/21/2022] Open
Abstract
Protozoan parasites infect and kill millions of people worldwide every year, particularly in developing countries where access to clean fresh water is limited. Among the most common are intestinal parasites, including Giardia lamblia and Entamoeba histolytica. These parasites wreak havoc on the epithelium lining the small intestines (G. lamblia) and colon (E. histolytica) causing giardiasis and amebiasis, respectively. In addition, there are less common but far more deadly pathogens such as Naegleria fowleri that thrive in warm waters and infect the central nervous systems of their victims via the nasal passages. Despite their prevalence and associated high mortality rates, there remains an unmet need to identify more effective therapeutics for people infected with these opportunistic parasites. To address this unmet need, we have surveyed plants and traditional herbal medicines known throughout the world to identify novel antiparasitic agents with activity against G. lamblia, E. histolytica, and N. fowleri. Herein, we report Larrea tridentata, known as creosote bush, as a novel source for secondary metabolites that display antiparasitic activity against all three pathogens. This report also characterizes the lignan compound classes, nordihydroguairetic acid and demethoxyisoguaiacin, as novel antiparasitic lead agents to further develop more effective drug therapy options for millions of people worldwide. Entamoeba histolytica, Giardia lamblia, and Naegleria fowleri pathogens are widespread throughout the world infecting and killing hundreds of thousands of people every year. They are also listed as category B bioterrorism agents by the NIH and the CDC. However, there is a serious unmet need to develop more effective therapies to treat these deadly pathogens. Herein we describe that lignans isolated from the creosote bush, common to the southwestern U.S.A. and throughout Mexico, display relatively potent antiparasitic activity against E. histolytica, G. lamblia, and N. fowleri.
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Affiliation(s)
- Bharat Bashyal
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Linfeng Li
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Trpta Bains
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Anjan Debnath
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, United States of America
- * E-mail: (DVL); (AD)
| | - Daniel V. LaBarbera
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
- * E-mail: (DVL); (AD)
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86
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Marín L, Gutiérrez-del-Río I, Yagüe P, Manteca Á, Villar CJ, Lombó F. De Novo Biosynthesis of Apigenin, Luteolin, and Eriodictyol in the Actinomycete Streptomyces albus and Production Improvement by Feeding and Spore Conditioning. Front Microbiol 2017; 8:921. [PMID: 28611737 PMCID: PMC5447737 DOI: 10.3389/fmicb.2017.00921] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 05/08/2017] [Indexed: 12/23/2022] Open
Abstract
Nutraceutical compounds as plant flavonoids play an important role in prevention and modulation of diverse heath conditions, as they exert interesting antifungal, antibacterial, antioxidant, and antitumor effects. They also possess anti-inflammatory activities in arthritis, cardiovascular disease or neurological diseases, as well as modulatory effects on the CYP450 activity on diverse drugs. Most flavonoids are bioactive molecules of plant origin, but their industrial production is sometimes hindered due to reasons as low concentration in the plant tissues, presence in only some species or as a complex mixture or inactive glycosides in plant vacuolae. In this work, we describe the de novo biosynthesis of two important flavones, apigenin and luteolin, and one known flavanone, eriodictyol. Their plant biosynthetic pathways have been reconstructed for heterologous expression in Streptomyces albus, an actinomycete bacterium manageable at industrial production level. Also, production levels for apigenin have been improved by feeding with naringenin precursor, and timing for settlement of secondary metabolism has been advanced by spore conditioning. In the cases of eriodictyol and luteolin, their production in this important type of biotechnology-prone bacteria, the actinomycetes, had not been described in the literature yet.
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Affiliation(s)
| | | | | | | | | | - Felipe Lombó
- Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC, Departamento de Biología Funcional, Área de Microbiología, University of OviedoOviedo, Spain
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87
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Yang WR, Choi YS, Jeong JH. Efficient synthesis of polymethoxyselenoflavones via regioselective direct C-H arylation of selenochromones. Org Biomol Chem 2017; 15:3074-3083. [PMID: 28321447 DOI: 10.1039/c7ob00118e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substantial research has suggested that the configuration and the total number of functional groups on flavones influence their bioactivity. To investigate the changes in the biological activities of selenoflavones in relationship to structural changes, the development of a generally applicable synthetic method was a key. Until now, an efficient pathway for palladium-catalyzed direct arylation with the selenocyclic enone systems is not known in the literature. We herein introduce a simple direct C-H arylation of two difficult coupling partners, selenochromones and electron-rich aryl bromide, affording diverse polymethoxyselenoflavones with great efficiency and high selectivity.
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Affiliation(s)
- Woo-Ram Yang
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea.
| | - Yong-Sung Choi
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea.
| | - Jin-Hyun Jeong
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea.
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88
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89
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Zhu F, Wang Z, Li Y, Wu XF. Iridium-Catalyzed and Ligand-Controlled Carbonylative Synthesis of Flavones from Simple Phenols and Internal Alkynes. Chemistry 2017; 23:3276-3279. [PMID: 28121387 DOI: 10.1002/chem.201700233] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Indexed: 01/30/2023]
Abstract
Flavones are important natural products with diverse biological activities. In this study, a novel procedure for the carbonylative synthesis of flavones has been developed by using simple phenols and internal alkynes as the substrates. Various flavones were isolated in moderate to good yields with excellent regioselectivity and functional group tolerance by using an iridium catalyst system. Notably, this is the first example of direct carbonylative annulation of non-preactivated phenols and alkynes to produce flavones, with the choice of ligand proving to be critical for the success of this transformation.
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Affiliation(s)
- Fengxiang Zhu
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Zechao Wang
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Yahui Li
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18059, Rostock, Germany.,Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou, 310018, P. R. China
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90
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Puranik N, Srivastava P. First synthesis of rugosaflavonoid and its derivatives and their activity against breast cancer. RSC Adv 2017. [DOI: 10.1039/c7ra04971d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Ligand interaction of 6f with 1M17.
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91
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Xanthone and Flavone Derivatives as Dual Agents with Acetylcholinesterase Inhibition and Antioxidant Activity as Potential Anti-Alzheimer Agents. J CHEM-NY 2017. [DOI: 10.1155/2017/8587260] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Alzheimer’s disease (AD) is a multifactorial neurodegenerative disorder that is associated with the elderly. The current therapy that is used to treat AD is based mainly on the administration of acetylcholinesterase (AChE) inhibitors. Due to their low efficacy there is a considerable need for other therapeutic strategies. Considering that the malfunctions of different, but interconnected, biochemical complex pathways play an important role in the pathogenesis of this disease, a promising therapy may consist in administration of drugs that act on more than a target on biochemical scenery of AD. In this work, the synthesis and evaluation of xanthone and flavone derivatives as antioxidants with AChE inhibitory activity were accomplished. Among the obtained compounds, Mannich bases3and14showed capacity to inhibit AChE and antioxidant property, exerting dual activity. Moreover, for the most promising AChE inhibitors, docking studies on the target have been performed aiming to predict the binding mechanism. The results presented here may help to identify new xanthone and flavone derivatives as dual anti-Alzheimer agents with AChE inhibitory and antioxidant activities.
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92
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Mir BA, Banerjee A, Santra SK, Rajamanickam S, Patel BK. Iron(III)-Catalyzed Peroxide-Mediated C-3 Functionalization of Flavones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600565] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Bilal Ahmad Mir
- Department of Chemistry; Indian Institute of Technology; Guwahati, North Guwahati - 781 039 Assam India
| | - Arghya Banerjee
- Department of Chemistry; Indian Institute of Technology; Guwahati, North Guwahati - 781 039 Assam India
| | - Sourav Kumar Santra
- Department of Chemistry; Indian Institute of Technology; Guwahati, North Guwahati - 781 039 Assam India
| | - Suresh Rajamanickam
- Department of Chemistry; Indian Institute of Technology; Guwahati, North Guwahati - 781 039 Assam India
| | - Bhisma K. Patel
- Department of Chemistry; Indian Institute of Technology; Guwahati, North Guwahati - 781 039 Assam India
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93
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Chavan SP, Bishwa Bidita Varadwaj G, Parida KM, Bhanage BM. Solvent-Switchable Regioselective Synthesis of Aurones and Flavones Using Palladium-Supported Amine-Functionalized Montmorillonite as a Heterogeneous Catalyst. ChemCatChem 2016. [DOI: 10.1002/cctc.201600549] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sujit P. Chavan
- Department of Chemistry; Institute of Chemical Technology, N. Parekh Marg, Matunga; Mumbai- 400019 India
| | - G. Bishwa Bidita Varadwaj
- Centre for Nano Science and Nano Technology; ITER, SOA University, Jagamohan Nagar; Bhubaneswar- 751 030, Odisha India
| | - Kulamani M. Parida
- Centre for Nano Science and Nano Technology; ITER, SOA University, Jagamohan Nagar; Bhubaneswar- 751 030, Odisha India
| | - Bhalchandra M. Bhanage
- Department of Chemistry; Institute of Chemical Technology, N. Parekh Marg, Matunga; Mumbai- 400019 India
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94
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Chen Y, Zhang Y. Functional and mechanistic analysis of telomerase: An antitumor drug target. Pharmacol Ther 2016; 163:24-47. [DOI: 10.1016/j.pharmthera.2016.03.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 03/29/2016] [Indexed: 01/26/2023]
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95
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Seca AML, Pinto DCGA, Silva AMS. Metabolomic Profile of the Genus Inula. Chem Biodivers 2016; 12:859-906. [PMID: 26080736 DOI: 10.1002/cbdv.201400080] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Indexed: 01/05/2023]
Abstract
Plants have a long history as therapeutics in the treatment of human diseases and have been used as source of medicines for ages. Searching for new biologically active natural products, many plants and herbs are screened for natural products with pharmacological activities. In this field, the genus Inula, which comprises more than 100 species, several of them being used in traditional medicine, is very important, especially due to the finding that several of the isolated pure secondary metabolites proved to possess important biological activities. Inula species have been reported as rich sources of sesquiterpene lactones, including eudesmanes, germacranes, guaianes, and dimeric structures, and since 2006 ca. 400 secondary metabolites, including more than 100 new natural products, some of them with relevant pharmacological activities, have been identified. Herein, we critically compile and update the information regarding the types of secondary metabolites found in the genus Inula and the progress in their isolation.
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Affiliation(s)
- Ana M L Seca
- DCTD, University of Azores, PT-9501-801 Ponta Delgada
| | - Diana C G A Pinto
- Department of Chemistry and QOPNA, University of Aveiro, Campus Universitário de Santiago, PT-3810-193 Aveiro, (phone: +351-234-401407; fax: +351-234-370084).
| | - Artur M S Silva
- Department of Chemistry and QOPNA, University of Aveiro, Campus Universitário de Santiago, PT-3810-193 Aveiro, (phone: +351-234-401407; fax: +351-234-370084).
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96
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Banerjee D, Kayal U, Maiti G. An efficient oxidative conversion of 2-aryl-2H-chromenes to the corresponding flavones by tert-butylhydroperoxide and copper bromide. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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97
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Shen C, Li W, Yin H, Spannenberg A, Skrydstrup T, Wu XF. Palladium-Catalyzed Carbonylative Synthesis of 2,3-Disubstituted Chromones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500858] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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98
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Talhi O, Brodziak-Jarosz L, Panning J, Orlikova B, Zwergel C, Tzanova T, Philippot S, Pinto DCGA, Paz FAA, Gerhäuser C, Dick TP, Jacob C, Diederich M, Bagrel D, Kirsch G, Silva AMS. One-Pot Synthesis of Benzopyran-4-ones with Cancer Preventive and Therapeutic Potential. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501278] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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99
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Ravishankar D, Watson KA, Greco F, Osborn HMI. Novel synthesised flavone derivatives provide significant insight into the structural features required for enhanced anti-proliferative activity. RSC Adv 2016. [DOI: 10.1039/c6ra11041j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Synthesis and antiproliferative evaluation of a library of 76 methoxy and hydroxy flavones, and their 4-thio analogues showed that the novel thioflavones 15f and 16f exhibit 7–46 fold greater anti-proliferative potency than the natural flavone chrysin (2d).
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100
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Wu Q, Wang Z, Li J, Qiu S, Cao D, Liu Z, Guan R. 3-Hydroxyflavone derivatives synthesized by a new simple method as chemosensors for cyanide anions. RSC Adv 2016. [DOI: 10.1039/c6ra11415f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two 3-hydroxyflavone derivatives as chemosensors for cyanide were synthesized by one step simple condensation, cyclization and subsequent oxidation reaction catalyzed by pyrrolidine, which shows great convenience compared with traditional method.
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Affiliation(s)
- Qianqian Wu
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Zian Wang
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Jiale Li
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Shuang Qiu
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Duxia Cao
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- China
| | - Ruifang Guan
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
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