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Cheng B, Chu X, Liu R, Ma X, Wang M, Zhang J, Jiao P, Gao Q, Ma W, Zhang Y, Zhao C, Zhou D, Xiao S. Synthesis of Novel Pentacyclic Triterpenoid Derivatives that Induce Apoptosis in Cancer Cells through a ROS-dependent, Mitochondrial-Mediated Pathway. Mol Pharm 2023; 20:701-710. [PMID: 36458832 DOI: 10.1021/acs.molpharmaceut.2c00885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Betulinic acid (BA) and oleanolic acid (OA) are plant-derived conjugates found in various medicinal plants that have emerged as potential antitumor agents. Herein, a series of novel BA and OA derivatives were synthesized by conjugation with per-O-methylated-β-cyclodextrin (PM-β-CD), and their anticancer properties against a panel of three human cancer cell lines were evaluated. Two OA-PM-β-CD conjugates (48 and 50) were observed to be the most potent conjugates against the three cell lines (MCF-7, BGC-823, and HL-60), with a 15- to 20-fold decrease in the IC50 values (IC50: 6.06-8.47 μM) compared with their parental conjugate (OA). Annexin V-FITC/propidium iodide staining and Western blot analysis revealed that both conjugates induced apoptosis in HL-60 cells. Additionally, in the representative conjugate 48-treated HL-60 cells, a decrease in mitochondrial membrane potential and subsequent release of cytochrome c into the cytosol were observed, indicating the activation of the intrinsic apoptosis pathway. Furthermore, 48 dramatically induced the generation of reactive oxygen species (ROS) in HL-60 cells, and the corresponding effect could be reversed using the ROS scavenger N-acetylcysteine. Collectively, these results suggest that the novel pentacyclic triterpenoid derivatives trigger the intrinsic apoptotic pathways via the ROS-mediated activation of caspase-3 signaling, inducing cell death in human cancer cells.
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Affiliation(s)
- Boyang Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Xindang Chu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Ruiwen Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Xinyuan Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.,Shenzhen Bay Laboratory, Institute of Chemical Biology, Shenzhen 518132, China
| | - Mengyang Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Jiayi Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Pingxuan Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Qianqian Gao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Wenxiao Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Yongmin Zhang
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 Place Jussieu, Paris 75005, France
| | - Chuanke Zhao
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Biochemistry and Molecular Biology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Demin Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.,Shenzhen Bay Laboratory, Institute of Chemical Biology, Shenzhen 518132, China.,Peking University Ningbo Institute of Marine Medicine, Ningbo 315010, China
| | - Sulong Xiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.,Shenzhen Bay Laboratory, Institute of Chemical Biology, Shenzhen 518132, China.,Peking University Ningbo Institute of Marine Medicine, Ningbo 315010, China
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2
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Zang Y, Ning J, Liu K, Shang M, Zang C, Li C, Ma J, Chen X, Ma J, Li G, Yang Y, Bao X, Zhang D, Zhang D. Design, synthesis and biological evaluation of pyranocarbazole derivatives against Alzheimer’s disease, with antioxidant, neuroprotective and cognition enhancing properties. Bioorg Chem 2022; 129:106179. [DOI: 10.1016/j.bioorg.2022.106179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/12/2022] [Accepted: 09/24/2022] [Indexed: 11/02/2022]
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3
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Borková L, Frydrych I, Vránová B, Jakubcová N, Lišková B, Gurská S, Džubák P, Pavliš P, Hajdúch M, Urban M. Lupane derivatives containing various aryl substituents in the position 3 have selective cytostatic effect in leukemic cancer cells including resistant phenotypes. Eur J Med Chem 2022; 244:114850. [DOI: 10.1016/j.ejmech.2022.114850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 11/04/2022]
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4
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Hodoň J, Frydrych I, Trhlíková Z, Pokorný J, Borková L, Benická S, Vlk M, Lišková B, Kubíčková A, Medvedíková M, Pisár M, Šarek J, Das V, Ligasová A, Koberna K, Džubák P, Hajdúch M, Urban M. Triterpenoid pyrazines and pyridines - Synthesis, cytotoxicity, mechanism of action, preparation of prodrugs. Eur J Med Chem 2022; 243:114777. [PMID: 36174412 DOI: 10.1016/j.ejmech.2022.114777] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 12/29/2022]
Abstract
A set of fifteen triterpenoid pyrazines and pyridines was prepared from parent triterpenoid 3-oxoderivatives (betulonic acid, dihydrobetulonic acid, oleanonic acid, moronic acid, ursonic acid, heterobetulonic acid, and allobetulone). Cytotoxicity of all compounds was tested in eight cancer and two non-cancer cell lines. Evaluation of the structure-activity relationships revealed that the triterpenoid core determined whether the final molecule is active or not, while the heterocycle is able to increase the activity and modulate the specificity. Five compounds (1b, 1c, 2b, 2c, and 8) were found to be preferentially and highly cytotoxic (IC50 ≈ 1 μM) against leukemic cancer cell lines (CCRF-CEM, K562, CEM-DNR, or K562-TAX). Surprisingly, compounds 1c, 2b, and 2c are 10-fold more active in multidrug-resistant leukemia cells (CEM-DNR and K562-TAX) than in their non-resistant analogs (CCRF-CEM and K562). Pharmacological parameters were measured for the most promising candidates and two types of prodrugs were synthesized: 1) Sugar-containing conjugates, most of which had improved cell penetration and retained high cytotoxicity in the CCRF-CEM cell line, unfortunately, they lost the selectivity against resistant cells. 2) Medoxomil derivatives, among which compounds 26-28 gained activities of IC50 0.026-0.043 μM against K562 cells. Compounds 1b, 8, 21, 22, 23, and 24 were selected for the evaluation of the mechanism of action based on their highest cytotoxicity against CCRF-CEM cell line. Several experiments showed that the majority of them cause apoptosis via the mitochondrial pathway. Compounds 1b, 8, and 21 inhibit growth and disintegrate spheroid cultures of HCT116 and HeLa cells, which would be important for the treatment of solid tumors. In summary, compounds 1b, 1c, 2b, 2c, 24, and 26-28 are highly and selectively cytotoxic against cancer cell lines and were selected for future in vivo tests and further development of anticancer drugs.
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Affiliation(s)
- Jiří Hodoň
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Ivo Frydrych
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Zdeňka Trhlíková
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Jan Pokorný
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Lucie Borková
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Sandra Benická
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Martin Vlk
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Břehová 7, 115 19, Prague 1, Czech Republic
| | - Barbora Lišková
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Agáta Kubíčková
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic; Czech Advanced Technologies and Research Institute (CATRIN), Institute of Molecular and Translational Medicine, Palacký University Olomouc, Křížkovského 511/8, 77900, Olomouc, Czech Republic
| | - Martina Medvedíková
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Martin Pisár
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Jan Šarek
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Viswanath Das
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic; Czech Advanced Technologies and Research Institute (CATRIN), Institute of Molecular and Translational Medicine, Palacký University Olomouc, Křížkovského 511/8, 77900, Olomouc, Czech Republic
| | - Anna Ligasová
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Karel Koberna
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Milan Urban
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic.
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5
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Pokorný J, Olejníková D, Frydrych I, Lišková B, Gurská S, Benická S, Šarek J, Kotulová J, Hajdúch M, Džubák P, Urban M. Substituted dienes prepared from betulinic acid - Synthesis, cytotoxicity, mechanism of action, and pharmacological parameters. Eur J Med Chem 2021; 224:113706. [PMID: 34311159 DOI: 10.1016/j.ejmech.2021.113706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
A set of new substituted dienes were synthesized from betulinic acid by its oxidation to 30-oxobetulinic acid followed by the Wittig reaction. Cytotoxicity of all compounds was tested in vitro in eight cancer cell lines and two noncancer fibroblasts. Almost all dienes were more cytotoxic than betulinic acid. Compounds 4.22, 4.30, 4.33, 4.39 had IC50 below 5 μmol/L; 4.22 and 4.39 were selected for studies of the mechanism of action. Cell cycle analysis revealed an increase in the number of apoptotic cells at 5 × IC50 concentration, where activation of irreversible changes leading to cell death can be expected. Both 4.22 and 4.39 led to the accumulation of cells in the G0/G1 phase with partial inhibition of DNA/RNA synthesis at 1 × IC50 and almost complete inhibition at 5 × IC50. Interestingly, compound 4.39 at 5 × IC50 caused the accumulation of cells in the S phase. Higher concentrations of tested drugs probably inhibit more off-targets than lower concentrations. Mechanisms disrupting cellular metabolism can induce the accumulation of cells in the S phase. Both compounds 4.22 and 4.39 trigger selective apoptosis in cancer cells via intrinsic pathway, which we have demonstrated by changes in the expression of the crucial apoptosis-related protein. Pharmacological parameters of derivative 4.22 were superior to 4.39, therefore 4.22 was the finally selected candidate for the development of anticancer drug.
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Affiliation(s)
- Jan Pokorný
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Denisa Olejníková
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Ivo Frydrych
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Barbora Lišková
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Sandra Benická
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Jan Šarek
- Department of Organic Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Jana Kotulová
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic
| | - Milan Urban
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 1333/5, 779 00, Olomouc, Czech Republic.
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6
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Bachořík J, Urban M. Biocatalysis in the Chemistry of Lupane Triterpenoids. Molecules 2021; 26:2271. [PMID: 33919839 PMCID: PMC8070785 DOI: 10.3390/molecules26082271] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 04/10/2021] [Accepted: 04/11/2021] [Indexed: 01/15/2023] Open
Abstract
Pentacyclic triterpenes are important representatives of natural products that exhibit a wide variety of biological activities. These activities suggest that these compounds may represent potential medicines for the treatment of cancer and viral, bacterial, or protozoal infections. Naturally occurring triterpenes usually have several drawbacks, such as limited activity and insufficient solubility and bioavailability; therefore, they need to be modified to obtain compounds suitable for drug development. Modifications can be achieved either by methods of standard organic synthesis or with the use of biocatalysts, such as enzymes or enzyme systems within living organisms. In most cases, these modifications result in the preparation of esters, amides, saponins, or sugar conjugates. Notably, while standard organic synthesis has been heavily used and developed, the use of the latter methodology has been rather limited, but it appears that biocatalysis has recently sparked considerably wider interest within the scientific community. Among triterpenes, derivatives of lupane play important roles. This review therefore summarizes the natural occurrence and sources of lupane triterpenoids, their biosynthesis, and semisynthetic methods that may be used for the production of betulinic acid from abundant and inexpensive betulin. Most importantly, this article compares chemical transformations of lupane triterpenoids with analogous reactions performed by biocatalysts and highlights a large space for the future development of biocatalysis in this field. The results of this study may serve as a summary of the current state of research and demonstrate the potential of the method in future applications.
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Affiliation(s)
- Jan Bachořík
- Department of Organic Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic;
| | - Milan Urban
- Medicinal Chemistry, Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine, Palacký University in Olomouc, Hněvotínská 5, 779 00 Olomouc, Czech Republic
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7
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Yamansarov EY, Lopatukhina EV, Evteev SA, Skvortsov DA, Lopukhov AV, Kovalev SV, Vaneev AN, Shkil' DO, Akasov RA, Lobov AN, Naumenko VA, Pavlova EN, Ryabaya OO, Burenina OY, Ivanenkov YA, Klyachko NL, Erofeev AS, Gorelkin PV, Beloglazkina EK, Majouga AG. Discovery of Bivalent GalNAc-Conjugated Betulin as a Potent ASGPR-Directed Agent against Hepatocellular Carcinoma. Bioconjug Chem 2021; 32:763-781. [PMID: 33691403 DOI: 10.1021/acs.bioconjchem.1c00042] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Herein, we describe the design, synthesis, and biological evaluation of novel betulin and N-acetyl-d-galactosamine (GalNAc) glycoconjugates and suggest them as targeted agents against hepatocellular carcinoma. We prepared six conjugates derived via the C-3 and C-28 positions of betulin with one or two saccharide ligands. These molecules demonstrate high affinity to the asialoglycoprotein receptor (ASGPR) of hepatocytes assessed by in silico modeling and surface plasmon resonance tests. Cytotoxicity studies in vitro revealed a bivalent conjugate with moderate activity, selectivity of action, and cytostatic properties against hepatocellular carcinoma cells HepG2. An additional investigation confirmed the specific engagement with HepG2 cells by the enhanced generation of reactive oxygen species. Stability tests demonstrated its lability to acidic media and to intracellular enzymes. Therefore, the selected bivalent conjugate represents a new potential agent targeted against hepatocellular carcinoma. Further extensive studies of the cellular uptake in vitro and the real-time microdistribution in the murine liver in vivo for fluorescent dye-labeled analogue showed its selective internalization into hepatocytes due to the presence of GalNAc ligand in comparison with reference compounds. The betulin and GalNAc glycoconjugates can therefore be considered as a new strategy for developing therapeutic agents based on natural triterpenoids.
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Affiliation(s)
- Emil Yu Yamansarov
- Lomonosov Moscow State University, Moscow 119991, Russian Federation.,National University of Science and Technology MISiS, Moscow 119049, Russian Federation.,Bashkir State University, Ufa 450076, Russian Federation
| | | | - Sergei A Evteev
- Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | | | - Anton V Lopukhov
- Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Sergey V Kovalev
- Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Alexander N Vaneev
- Lomonosov Moscow State University, Moscow 119991, Russian Federation.,National University of Science and Technology MISiS, Moscow 119049, Russian Federation
| | - Dmitry O Shkil'
- Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Roman A Akasov
- National University of Science and Technology MISiS, Moscow 119049, Russian Federation
| | - Alexander N Lobov
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences, Ufa 450054, Russian Federation
| | - Victor A Naumenko
- V. Serbsky National Medical Research Center for Psychiatry and Narcology, Moscow 119034, Russian Federation
| | | | - Oxana O Ryabaya
- Department of Experimental Diagnostic and Tumor Therapy, N. N. Blokhin National Medical Research Center for Oncology, Moscow 115478, Russian Federation
| | - Olga Yu Burenina
- Skolkovo Institute of Science and Technology, Skolkovo 143026, Russian Federation
| | - Yan A Ivanenkov
- The Federal State Unitary Enterprise Dukhov Automatics Research Institute, Moscow 127055, Russian Federation.,Institute of Biochemistry and Genetics, Russian Academy of Science (IBG RAS) of the Ufa Federal Research Centre, Ufa 450054, Russian Federation
| | - Natalia L Klyachko
- Lomonosov Moscow State University, Moscow 119991, Russian Federation.,Skolkovo Institute of Science and Technology, Skolkovo 143026, Russian Federation
| | - Alexander S Erofeev
- Lomonosov Moscow State University, Moscow 119991, Russian Federation.,National University of Science and Technology MISiS, Moscow 119049, Russian Federation
| | - Petr V Gorelkin
- Lomonosov Moscow State University, Moscow 119991, Russian Federation.,National University of Science and Technology MISiS, Moscow 119049, Russian Federation
| | | | - Alexander G Majouga
- Lomonosov Moscow State University, Moscow 119991, Russian Federation.,National University of Science and Technology MISiS, Moscow 119049, Russian Federation.,Dmitry Mendeleev University of Chemical Technology of Russia, Moscow 125047, Russian Federation
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8
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Gonzalez G, Hodoň J, Kazakova A, D'Acunto CW, Kaňovský P, Urban M, Strnad M. Novel pentacyclic triterpenes exhibiting strong neuroprotective activity in SH-SY5Y cells in salsolinol- and glutamate-induced neurodegeneration models. Eur J Med Chem 2021; 213:113168. [PMID: 33508480 DOI: 10.1016/j.ejmech.2021.113168] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/03/2021] [Accepted: 01/04/2021] [Indexed: 12/12/2022]
Abstract
Novel triterpene derivatives were prepared and evaluated in salsolinol (SAL)- and glutamate (Glu)-induced models of neurodegeneration in neuron-like SH-SY5Y cells. Among the tested compounds, betulin triazole 4 bearing a tetraacetyl-β-d-glucose substituent showed a highly potent neuroprotective effect. Further studies revealed that removal of tetraacetyl-β-d-glucose part (free triazole derivative 10) resulted in strong neuroprotection in the SAL model at 1 μM, but this derivative suffered from cytotoxicity at higher concentrations. Both compounds modulated oxidative stress and caspase-3,7 activity, but 10 showed a superior effect comparable to the Ac-DEVD-CHO inhibitor. Interestingly, while both 4 and 10 outperformed the positive controls in blocking mitochondrial permeability transition pore opening, only 4 demonstrated potent restoration of the mitochondrial membrane potential (MMP) in the model. Derivatives 4 and 10 also showed neuroprotection in the Glu model, with 10 exhibiting the strongest oxidative stress reducing effect among the tested compounds, while the neuroprotective activity of 4 was probably due recovery of the MMP.
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Affiliation(s)
- Gabriel Gonzalez
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and the Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic; Department of Neurology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacký University Olomouc, CZ-775 20, Olomouc, Czech Republic
| | - Jiří Hodoň
- Department of Organic Chemistry, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Anna Kazakova
- Department of Organic Chemistry, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46, Olomouc, Czech Republic
| | - Cosimo Walter D'Acunto
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and the Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Petr Kaňovský
- Department of Neurology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacký University Olomouc, CZ-775 20, Olomouc, Czech Republic
| | - Milan Urban
- Department of Medicinal Chemistry, Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Hnevotinska 5, 779 00, Olomouc, Czech Republic.
| | - Miroslav Strnad
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and the Institute of Experimental Botany of the Czech Academy of Sciences, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic; Department of Neurology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacký University Olomouc, CZ-775 20, Olomouc, Czech Republic.
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9
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Herrera-González I, Sánchez-Fernández EM, Sau A, Nativi C, García Fernández JM, Galán MC, Ortiz Mellet C. Stereoselective Synthesis of Iminosugar 2-Deoxy(thio)glycosides from Bicyclic Iminoglycal Carbamates Promoted by Cerium(IV) Ammonium Nitrate and Cooperative Brønsted Acid-Type Organocatalysis. J Org Chem 2020; 85:5038-5047. [PMID: 32159355 DOI: 10.1021/acs.joc.0c00324] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The first examples of iminosugar-type 2-deoxy(thio)glycoside mimetics are reported. The key step is the activation of a bicyclic iminoglycal carbamate to generate a highly reactive acyliminium cation. Cerium(IV) ammonium nitrate efficiently promoted the formation of 2-deoxy S-glycosides in the presence of thiols, probably by in situ generation of catalytic HNO3, with complete α-stereoselectivity. Cooperative phosphoric acid/Schreiner's thiourea organocatalysis proved better suited for generating 2-deoxy O-glycosides, significantly broadening the scope of the approach.
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Affiliation(s)
- Irene Herrera-González
- Deptartment of Química Orgánica, Facultad de Química, Universidad de Sevilla, C/ Profesor García González 1, E-41012 Sevilla, Spain
| | - Elena M Sánchez-Fernández
- Deptartment of Química Orgánica, Facultad de Química, Universidad de Sevilla, C/ Profesor García González 1, E-41012 Sevilla, Spain
| | - Abhijit Sau
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K
| | - Cristina Nativi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 13, 50019 Sesto Fiorentino, Florence, Italy
| | - José M García Fernández
- Instituto de Investigaciones Químicas (IIQ), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - M Carmen Galán
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K
| | - Carmen Ortiz Mellet
- Deptartment of Química Orgánica, Facultad de Química, Universidad de Sevilla, C/ Profesor García González 1, E-41012 Sevilla, Spain
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