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Norman JE, Nuthikattu S, Milenkovic D, Rutledge JC, Villablanca AC. Sex-Specific Response of the Brain Free Oxylipin Profile to Soluble Epoxide Hydrolase Inhibition. Nutrients 2023; 15:1214. [PMID: 36904213 PMCID: PMC10005333 DOI: 10.3390/nu15051214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/22/2023] [Accepted: 02/25/2023] [Indexed: 03/04/2023] Open
Abstract
Oxylipins are the oxidation products of polyunsaturated fatty acids and have been implicated in neurodegenerative disorders, including dementia. Soluble epoxide hydrolase (sEH) converts epoxy-fatty acids to their corresponding diols, is found in the brain, and its inhibition is a treatment target for dementia. In this study, male and female C57Bl/6J mice were treated with an sEH inhibitor (sEHI), trans-4-[4-(3-adamantan-1-yl-ureido)-cyclohexyloxy]-benzoic acid (t-AUCB), for 12 weeks to comprehensively study the effect of sEH inhibition on the brain oxylipin profile, and modulation by sex. Ultra-high-performance liquid chromatography-tandem mass spectrometry was used to measure the profile of 53 free oxylipins in the brain. More oxylipins were modified by the inhibitor in males than in females (19 versus 3, respectively) and favored a more neuroprotective profile. Most were downstream of lipoxygenase and cytochrome p450 in males, and cyclooxygenase and lipoxygenase in females. The inhibitor-associated oxylipin changes were unrelated to serum insulin, glucose, cholesterol, or female estrous cycle. The inhibitor affected behavior and cognitive function as measured by open field and Y-maze tests in males, but not females. These findings are novel and important to our understanding of sexual dimorphism in the brain's response to sEHI and may help inform sex-specific treatment targets.
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Affiliation(s)
- Jennifer E. Norman
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA 95616, USA
| | - Saivageethi Nuthikattu
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA 95616, USA
| | - Dragan Milenkovic
- Department of Nutrition, University of California, Davis, CA 95616, USA
| | - John C. Rutledge
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA 95616, USA
| | - Amparo C. Villablanca
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA 95616, USA
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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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