Abstract
Accumulating evidence suggests that diets rich in ω-3 polyunsaturated fatty acids (PUFAs) offer protection against vascular inflammation, neuroinflammation, hypertension, and thrombosis. Recently, biochemical studies have demonstrated that these benefits are partially mediated by their conversion to ω-3 endocannabinoid epoxide metabolites. These lipid metabolites originate from the epoxidation of ω-3 endocannabinoids, docosahexanoyl ethanolamide (DHEA) and eicosapentaenoyl ethanolamide (EPEA) by cytochrome P450 (CYP) epoxygenases to form epoxydocosapentaenoic acid-ethanolamides (EDP-EAs) and epoxyeicosatetraenoic acid-ethanolamides (EEQ-EAs), respectively. The EDP-EAs and EEQ-EAs are endogenously produced in rat brain and peripheral organs. Additionally, EDP-EAs and EEQ-EAs dose-dependently decrease pro-inflammatory IL-6 cytokine and increased anti-inflammatory IL-10 cytokine. Furthermore, the EEQ-EAs and EDP-EAs attenuate angiogenesis and cell migration in cancer cells, induce vasodilation in bovine coronary arteries, and reciprocally regulate platelet aggregation in washed human platelets. Taken together, the ω-3 endocannabinoid epoxides represent a new class of dual acting molecules that display unique pharmacological properties.
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Abbreviations
- 2-AG:
-
2-arachidonoyl-glycerol
- 2-DHG:
-
2-docosahexaenoyl-glycerol
- 2-EPG:
-
2-eicosapentaenoyl-glycerol
- AA:
-
arachidonic acid
- AEA:
-
anandamide
- cAMP:
-
cyclic adenosine monophosphate
- CB1:
-
cannabinoid receptor 1
- CB2:
-
cannabinoid receptor 2
- CYP:
-
cytochrome P450
- DHA:
-
docosahexaenoic acid
- DHEA:
-
docosahexaenoyl ethanolamide
- eCB:
-
endocannabinoid
- EDP-EA:
-
docosapentaenoic acid ethanolamide
- EEQ-EA:
-
epoxyeicosatetraenoic acid ethanolamide
- EPA:
-
eicosapentaenoic acid
- EPEA:
-
eicosapentaenoyl ethanolamide
- FAAH:
-
fatty amide hydrolase
- GPCR:
-
G-Protein coupled receptor
- MAGL:
-
monoacylglycerol lipase
- sEH:
-
soluble epoxide hydrolase
- Δ9-THC:
-
Δ9-tetrahydrocannabinol
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Acknowledgements
This work was partly supported by American Heart Association Scientist Development Grant 15SDG25760064 (A.D.), National Institutes of Health (NIH) Grant R01 GM1155884 (A.D.), and R03 DA042365 (A.D). We would like to acknowledge Daniel R. McDougle, William R. Arnold, Jahnabi Roy, and Josephine E. Watson for doing the research related to omega-3 endocannabinoid epoxides.
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The authors declare no competing financial interest.
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Carnevale, L.N., Das, A. (2019). Novel Anti-inflammatory and Vasodilatory ω-3 Endocannabinoid Epoxide Regioisomers. In: Honn, K., Zeldin, D. (eds) The Role of Bioactive Lipids in Cancer, Inflammation and Related Diseases. Advances in Experimental Medicine and Biology, vol 1161. Springer, Cham. https://doi.org/10.1007/978-3-030-21735-8_17
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