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Egbewande FA, Schwartz BD, Duffy S, Avery VM, Davis RA. Synthesis and Antimalarial Evaluation of Halogenated Analogues of Thiaplakortone A. Mar Drugs 2023; 21:md21050317. [PMID: 37233511 DOI: 10.3390/md21050317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/12/2023] [Accepted: 05/17/2023] [Indexed: 05/27/2023] Open
Abstract
The incorporation of bromine, iodine or fluorine into the tricyclic core structure of thiaplakortone A (1), a potent antimalarial marine natural product, is reported. Although yields were low, it was possible to synthesise a small nine-membered library using the previously synthesised Boc-protected thiaplakortone A (2) as a scaffold for late-stage functionalisation. The new thiaplakortone A analogues (3-11) were generated using N-bromosuccinimide, N-iodosuccinimide or a Diversinate™ reagent. The chemical structures of all new analogues were fully characterised by 1D/2D NMR, UV, IR and MS data analyses. All compounds were evaluated for their antimalarial activity against Plasmodium falciparum 3D7 (drug-sensitive) and Dd2 (drug-resistant) strains. Incorporation of halogens at positions 2 and 7 of the thiaplakortone A scaffold was shown to reduce antimalarial activity compared to the natural product. Of the new compounds, the mono-brominated analogue (compound 5) displayed the best antimalarial activity with IC50 values of 0.559 and 0.058 μM against P. falciparum 3D7 and Dd2, respectively, with minimal toxicity against a human cell line (HEK293) observed at 80 μM. Of note, the majority of the halogenated compounds showed greater efficacy against the P. falciparum drug-resistant strain.
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Affiliation(s)
- Folake A Egbewande
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Brett D Schwartz
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Sandra Duffy
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
- Discovery Biology, Centre for Cellular Phenomics, Griffith University, Nathan, QLD 4111, Australia
| | - Vicky M Avery
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
- Discovery Biology, Centre for Cellular Phenomics, Griffith University, Nathan, QLD 4111, Australia
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
- NatureBank, Griffith University, Nathan, QLD 4111, Australia
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2
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Hong CM, Zou FF, Zhuang X, Luo Z, Liu ZQ, Ren LQ, Li QH, Liu TL. 2-Pyridinylmethyl borrowing: base-promoted C-alkylation of (pyridin-2-yl)-methyl alcohols with ketones via cleavage of unstrained C(sp3)–C(sp3) bonds. Org Chem Front 2022. [DOI: 10.1039/d1qo01446c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
2-Pyridinylmethyl Borrowing: Transition-metal-free 2-pyridinylmethyl borrowing C-alkylation of alcohols access to ketones is developed. This unstrained C(sp3)–C(sp3) bonds cleavage of unactivated alcohols avoids the use of transition metals.
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Affiliation(s)
- Chuan-Ming Hong
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Fei-Fei Zou
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xin Zhuang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhen Luo
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zheng-Qiang Liu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Li-Qing Ren
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qing-Hua Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Tang-Lin Liu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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3
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Pardhe BD, Do H, Jeong CS, Kim KH, Lee JH, Oh TJ. Characterization of high-H 2O 2-tolerant bacterial cytochrome P450 CYP105D18: insights into papaverine N-oxidation. IUCRJ 2021; 8:684-694. [PMID: 34258016 PMCID: PMC8256718 DOI: 10.1107/s2052252521005522] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 05/28/2021] [Indexed: 06/13/2023]
Abstract
The bacterial CYP105 family is involved in secondary metabolite biosynthetic pathways and plays essential roles in the biotransformation of xenobiotics. This study investigates the newly identified H2O2-mediated CYP105D18 from Streptomyces laurentii as the first bacterial CYP for N-oxidation. The catalytic efficiency of CYP105D18 for papaverine N-oxidation was 1.43 s-1 µM -1. The heme oxidation rate (k) was low (<0.3 min-1) in the presence of 200 mM H2O2. This high H2O2 tolerance capacity of CYP105D18 led to higher turnover prior to heme oxidation. Additionally, the high-resolution papaverine complexed structure and substrate-free structure of CYP105D18 were determined. Structural analysis and activity assay results revealed that CYP105D18 had a strong substrate preference for papaverine because of its bendable structure. These findings establish a basis for biotechnological applications of CYP105D18 in the pharmaceutical and medicinal industries.
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Affiliation(s)
- Bashu Dev Pardhe
- Department of Life Science and Biochemical Engineering, Graduate School, SunMoon University, Asan 31460, Republic of Korea
| | - Hackwon Do
- Research Unit of Cryogenic Novel Material, Korea Polar Research Institute, 26, Songdomirae-ro, Yeonsu-gu, Incheon 21990, Republic of Korea
| | - Chang-Sook Jeong
- Research Unit of Cryogenic Novel Material, Korea Polar Research Institute, 26, Songdomirae-ro, Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Sciences, University of Science and Technology, Incheon 21990, Republic of Korea
| | - Ki-Hwa Kim
- Department of Life Science and Biochemical Engineering, Graduate School, SunMoon University, Asan 31460, Republic of Korea
| | - Jun Hyuck Lee
- Research Unit of Cryogenic Novel Material, Korea Polar Research Institute, 26, Songdomirae-ro, Yeonsu-gu, Incheon 21990, Republic of Korea
- Department of Polar Sciences, University of Science and Technology, Incheon 21990, Republic of Korea
| | - Tae-Jin Oh
- Department of Life Science and Biochemical Engineering, Graduate School, SunMoon University, Asan 31460, Republic of Korea
- Genome-based BioIT Convergence Institute, Asan 31460, Republic of Korea
- Department of Pharmaceutical Engineering and Biotechnology, SunMoon University, Asan 31460, Republic of Korea
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Gaber A, Alsanie WF, Kumar DN, Refat MS, Saied EM. Novel Papaverine Metal Complexes with Potential Anticancer Activities. Molecules 2020; 25:molecules25225447. [PMID: 33233775 PMCID: PMC7699950 DOI: 10.3390/molecules25225447] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 12/12/2022] Open
Abstract
Cancer is one of the leading causes of death worldwide. Although several potential therapeutic agents have been developed to efficiently treat cancer, some side effects can occur simultaneously. Papaverine, a non-narcotic opium alkaloid, is a potential anticancer drug that showed selective antitumor activity in various tumor cells. Recent studies have demonstrated that metal complexes improve the biological activity of the parent bioactive ligands. Based on those facts, herein we describe the synthesis of novel papaverine–vanadium(III), ruthenium(III) and gold(III) metal complexes aiming at enhancing the biological activity of papaverine drug. The structures of the synthesized complexes were characterized by various spectroscopic methods (IR, UV–Vis, NMR, TGA, XRD, SEM). The anticancer activity of synthesized metal complexes was evaluated in vitro against two types of cancer cell lines: human breast cancer MCF-7 cells and hepatocellular carcinoma HepG-2 cells. The results revealed that papaverine-Au(III) complex, among the synthesized complexes, possess potential antimicrobial and anticancer activities. Interestingly, the anticancer activity of papaverine–Au(III) complex against the examined cancer cell lines was higher than that of the papaverine alone, which indicates that Au-metal complexation improved the anticancer activity of the parent drug. Additionally, the Au complex showed anticancer activity against the breast cancer MCF-7 cells better than that of cisplatin. The biocompatibility experiments showed that Au complex is less toxic than the papaverine drug alone with IC50 ≈ 111µg/mL. These results indicate that papaverine–Au(III) complex is a promising anticancer complex-drug which would make it a suitable candidate for further in vivo investigations.
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Affiliation(s)
- Ahmed Gaber
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Walaa F. Alsanie
- Department of Clinical Laboratories, College of Applied Medical Sciences, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Deo Nandan Kumar
- Department of Chemistry, Deshbandhu College, University of Delhi, Delhi 110019, India;
| | - Moamen S. Refat
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
- Department of Chemistry, Faculty of Science, Port Said University, Port Said 42511, Egypt
- Correspondence: (M.S.R.); (E.M.S.)
| | - Essa M. Saied
- Chemistry Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
- Institute for Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
- Correspondence: (M.S.R.); (E.M.S.)
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5
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Huxley C, Wibowo M, Lum KY, Gordon S, D'Hyon S, Guan H, Wang X, Chen Y, Si M, Wang M, White JM, Wahi K, Wang Q, Holst J, Davis RA. Synthesis of bilocularin A carbamate derivatives and their evaluation as leucine transport inhibitors in prostate cancer cells. PHYTOCHEMISTRY 2020; 179:112478. [PMID: 32805621 DOI: 10.1016/j.phytochem.2020.112478] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 07/08/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Large-scale extraction of the leaves of the Australian rainforest tree Maytenus bilocularis followed by extensive purification studies afforded the targeted and abundant dihydro-β-agarofuran, bilocularin A, in sufficient quantities (>500 mg) for detailed semi-synthetic chemistry. Eight bilocularin A carbamate analogues were synthesised using a series of commercially available isocyanate reagents in high purity (>95%) and variable yields (9-91%). All previously undescribed analogues were spectroscopically characterised using NMR, UV, IR and MS data. One compound afforded crystalline material and subsequent single crystal X-ray analysis (Cu-Kα) confirmed the chemical structure along with the absolute configuration. All compounds were evaluated for anti-proliferative activity against the human prostate cancer cell line LNCaP; none of the compounds showed significant (>50%) growth inhibition at 20 μM. Compounds were also tested for their ability to inhibit leucine transport in LNCaP cells, and two analogues showed moderate activity with IC50 values of 8.9 and 8.5 μM. This is the first reported synthesis of dihydro-β-agarofuran carbamate derivatives.
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Affiliation(s)
- Cohan Huxley
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Mario Wibowo
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Kah Yean Lum
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Shelly Gordon
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Sebastian D'Hyon
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Hanyu Guan
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Xueyi Wang
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Yuxi Chen
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Mingran Si
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Mengchao Wang
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia
| | - Jonathan M White
- School of Chemistry and Bio 21 Institute, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Kanu Wahi
- Translational Cancer Metabolism Laboratory, School of Medical Sciences and Prince of Wales Clinical School, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Qian Wang
- Translational Cancer Metabolism Laboratory, School of Medical Sciences and Prince of Wales Clinical School, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Jeff Holst
- Translational Cancer Metabolism Laboratory, School of Medical Sciences and Prince of Wales Clinical School, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia.
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