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Baltina LA, Lai HC, Liu YC, Huang SH, Hour MJ, Baltina LA, Nugumanov TR, Borisevich SS, Khalilov LM, Petrova SF, Khursan SL, Lin CW. Glycyrrhetinic acid derivatives as Zika virus inhibitors: Synthesis and antiviral activity in vitro. Bioorg Med Chem 2021; 41:116204. [PMID: 34022526 DOI: 10.1016/j.bmc.2021.116204] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/14/2021] [Accepted: 04/30/2021] [Indexed: 01/12/2023]
Abstract
Zika virus (ZIKV) is an arbovirus of the Flaviviridae family (Flavivirus genus), causing serious neurological complications, such as Guillain-Barre Syndrome (GBS) in adults and fetal microcephaly. Licensed vaccines or specific antiviral agents against ZIKV do not currently exist. Therefore, the search and development of anti-ZIKV agents are particularly relevant and necessary. Glycyrrhetinic (3β-hydroxy-11-oxo-18βH-Olean-12-en-30-oic acid) (GA) 1 is one of the well-known pentacyclic triterpenoids isolated from licorice root (Glycyrrhiza glabra L., Gl. uralensis Fisher) (Leguminosae) possessing many biological features, including antiviral activity. This paper is devoted to the synthesis and studies of a number of nitrogen and sulfur-containing GA derivatives as ZIKV inhibitors. Sixteen GA and related triterpenoids (3β-hydroxy-18βH-Olean-12-en-30-oic acid and 3β-hydroxy-11-oxo-18βH-Olean-12(13),18(19)-dien-30-oic acid) derivatives were synthesized (amides, semi- and thiosemicarbazones, and 1,2,3-thiadiazoles) and antiviral activity against ZIKV was studied in vitro, including the inhibitory assays on cytopathic effect (CPE), viral protein synthesis, and replication stages. Four active compounds were found among GA derivatives tested, 13 (3-O-acetyl-30-aminopyridine GA), 16 (3-semicarbazone-30-butyl GA), 18 (1,2,3-thiadiazole-30-methyl GA), and 19 (1,2,3-thiadiazole-30-butyl GA) with IC50 < 1 μM against ZIKV replication. These compounds had a stronger inhibitory activity on ZIKV-induced CPE and viral protein translation in infected cells as compared to derivatives of 11-desoxo-GA. The most active compound was amide 13 (IC50 0.13 μM, TI ˃ 384). Time-of-addition assays indicated that 1,2,3-thiadiazole ring is important for inhibiting viral entry stage (compounds 18 and 19), while the 30-butyl ester group influenced on post-entry stage (compound 19). The molecular docking analysis demonstrated that lead compounds 13 and 19 forms a hydrogen-bond interaction with the catalytic triad (His51-Asp75-Ser135) of ZIKV NS2B-NS3 protease. Therefore, the active GA derivatives are promising for developing new antiviral agents against ZIKV infection.
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Affiliation(s)
- Lidia A Baltina
- Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation.
| | - Hsueh-Chou Lai
- Division of Hepato-gastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung 40447, Taiwan, ROC
| | - Ya-Chi Liu
- Department of Medical Laboratory Science and Biotechnology, China Medical University, 91, Hsueh-Shih Rd., Taichung 40402, Taiwan, ROC; Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung 40402, Taiwan, ROC
| | - Su-Hua Huang
- Department of Biotechnology, Asia University, 500, Lioufeng Rd., Wufeng, Taichung 41354, Taiwan, ROC
| | - Mann-Jen Hour
- School of Pharmacy, China Medical University, Taichung 40402, Taiwan, ROC
| | - Lia A Baltina
- Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation
| | - Tagir R Nugumanov
- Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation
| | - Sophia S Borisevich
- Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation
| | - Leonard M Khalilov
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Centre of the Russian Academy of Sciences, 141 prosp. Oktyabrya, 450054 Ufa, Russian Federation
| | - Svetlana F Petrova
- Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation
| | - Sergey L Khursan
- Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, 91, Hsueh-Shih Rd., Taichung 40402, Taiwan, ROC; Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung 40402, Taiwan, ROC; Department of Biotechnology, Asia University, 500, Lioufeng Rd., Wufeng, Taichung 41354, Taiwan, ROC.
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Kazakova O, Smirnova I, Lopatina T, Giniyatullina G, Petrova A, Khusnutdinova E, Csuk R, Serbian I, Loesche A. Synthesis and cholinesterase inhibiting potential of A-ring azepano- and 3-amino-3,4-seco-triterpenoids. Bioorg Chem 2020; 101:104001. [PMID: 32683137 DOI: 10.1016/j.bioorg.2020.104001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/20/2020] [Accepted: 06/07/2020] [Indexed: 01/07/2023]
Abstract
In this study, a series of A-ring azepano- and 3-amino-3,4-seco-derivatives were synthesized from betulin, oleanolic, ursolic and glycyrrhetinic acids aiming to develop new cholinesterase inhibitors. Azepanobetulin, azepanoerythrodiol and azepanouvaol were modified to give amide and tosyl derivatives, while azepano-anhydrobetulines and azepano-glycyrrhetols were obtained for the first time. Oleanane and ursane type 3-amino-3,4-seco-4(23)-en triterpenic alcohols were synthesized by reducing the corresponding 2-cyano-derivatives accessible from Beckmann type 2 rearrangements. The compounds were screened in colorimetric Ellman's assays to determine their ability to act as inhibitors for the enzymes acetylcholinesterase (AChE, from electric eel) and butyrylcholinesterase (BChE, from equine serum). While most of these compounds were only moderate inhibitors for AChE, several of them were shown to be inhibitors for BChE acting as mixed-type inhibitors. Azepanobetulin 1, its C28-amide derivatives 7 and 8, azepano-11-deoxo-glycyrrhetol 12 and azepanouvaol 18 held inhibition constants Ki ranging between 0.21 ± 0.06 to 0.68 ± 0.19 μM. Thus, they were approximately 4 to 10 times more active than standard galantamine hydrobromide. For all of the compounds reasonably high docking scores for BChE were obtained being in good agreement with the experimental results from the enzymatic studies. As a result, A-ring azepano-triterpenoids were found to be new scaffolds for the development of BChE inhibitors.
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Affiliation(s)
- Oxana Kazakova
- Ufa Institute of Chemistry UFRC RAS, pr. Octyabrya 71, 450054 Ufa, Russian Federation.
| | - Irina Smirnova
- Ufa Institute of Chemistry UFRC RAS, pr. Octyabrya 71, 450054 Ufa, Russian Federation
| | - Tatyana Lopatina
- Ufa Institute of Chemistry UFRC RAS, pr. Octyabrya 71, 450054 Ufa, Russian Federation
| | | | - Anastasiya Petrova
- Ufa Institute of Chemistry UFRC RAS, pr. Octyabrya 71, 450054 Ufa, Russian Federation
| | - Elmira Khusnutdinova
- Ufa Institute of Chemistry UFRC RAS, pr. Octyabrya 71, 450054 Ufa, Russian Federation
| | - René Csuk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany.
| | - Immo Serbian
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
| | - Anne Loesche
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
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