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Inhibitory Activity of Quaternary Isoquinoline Alkaloids on Soluble Epoxide Hydrolase. Curr Issues Mol Biol 2022; 44:4282-4289. [PMID: 36135206 PMCID: PMC9498296 DOI: 10.3390/cimb44090294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/07/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
The quaternary isoquinoline alkaloids of palmatine (1), berberine (2), and jatrorrhizine (3) were evaluated in terms of their ability to inhibit soluble epoxide hydrolase (sEH). They had similar inhibitory activities, with IC50 values of 29.6 ± 0.5, 33.4 ± 0.8, and 27.3 ± 0.4 μM, respectively. Their respective Ki values of 26.9, 46.8, and 44.5 μM—determined by enzyme kinetics—indicated that they inhibited the catalytic reaction by binding noncompetitively with sEH. The application of computational chemistry to the in vitro results revealed the site of the receptor to which the ligand would likely bind. Accordingly, three alkaloids were identified as having a suitable basic skeleton for lead compound development of sEH inhibitors.
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Burmistrov V, Morisseau C, Pitushkin D, Fayzullin RR, Karlov D, Vernigora A, Kuznetsov Y, Abbas SM, Butov GM, Hammock BD. Ureas derived from camphor and fenchone reveal enantiomeric preference of human soluble epoxide hydrolase. RESULTS IN CHEMISTRY 2022; 4:100653. [PMID: 37601415 PMCID: PMC10438916 DOI: 10.1016/j.rechem.2022.100653] [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] [Indexed: 11/17/2022] Open
Abstract
The soluble epoxide hydrolase (sEH) is a potential target to treat cardiovascular, renal and neuronal diseases. A series of sEH inhibitors containing naturally occurring lipophilic groups (originating from camphor and fenchone) were developed. Inhibitory potency ranging from 0.7 nM to 6.47 μM was obtained. It was discovered that ureas derived from L-camphor were more active against sEH (2.3-fold average) than the corresponding analogues derived from D-camphor indicating enantiomeric preference of sEH. Ureas derived from fenchone possess lower activity against sEH (ca. 80-fold on average) than their camphor-derived analogs due to the specific structure of the lipophilic fragment and show less enantiomeric preference (1.75-fold on average). Moreover, fenchone-derived ureas show no consistency in enantiomeric preference. Endo/exo-form of compound L-3a derived from L-camphor is 4-fold more potent than the corresponding analogue prepared from D-camphor (IC50 = 0.7 nM vs. 2.8 nM) making it the most promising sEH inhibitor among the tested series.
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Affiliation(s)
- Vladimir Burmistrov
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, 404121, Russia
| | - Christophe Morisseau
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Dmitry Pitushkin
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, 404121, Russia
| | - Robert R. Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Street, Kazan, 420088, Russia
| | - Dmitry Karlov
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Moscow, 143026, Russia
| | - Andrey Vernigora
- Department of Organic Chemistry, Volgograd State Technical University, Volgograd, 400005, Russia
| | - Yaroslav Kuznetsov
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, 404121, Russia
| | - Saeef M.H. Abbas
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, 404121, Russia
| | - Gennady M. Butov
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, 404121, Russia
| | - Bruce D. Hammock
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
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