Omega-3 fatty acids fight inflammation via cannabinoids

Study: Omega-3 fatty acids fight inflammation via cannabinoids
Graduate student Josephine Watson, professor Aditi Das, graduate student Megan Corbett, professor Kristopher Kilian and their colleagues discovered an enzymatic pathway that converts omega-3-derived endocannabinoids into more potent anti-inflammatory molecules. Credit: Steph Adams

Chemical compounds called cannabinoids are found in marijuana and also are produced naturally in the body from omega-3 fatty acids. A well-known cannabinoid in marijuana, tetrahydrocannabinol, is responsible for some of its euphoric effects, but it also has anti-inflammatory benefits. A new study in animal tissue reveals the cascade of chemical reactions that convert omega-3 fatty acids into cannabinoids that have anti-inflammatory benefits—but without the psychotropic high.

The findings are published in the Proceedings of the National Academy of Sciences.

Foods such as meat, eggs, fish and nuts contain omega-3 and , which the body converts into endocannabinoids—cannabinoids that the body produces naturally, said Aditi Das, a University of Illinois professor of comparative biosciences and biochemistry, who led the study. Cannabinoids in and endocannabinoids produced in the body can support the body's immune system and therefore are attractive targets for the development of anti-inflammatory therapeutics, she said.

In 1964, the Israeli chemist Raphael Mechoulam was the first to discover and isolate THC from marijuana. To test whether he had found the compound that produces euphoria, he dosed cake slices with 10 milligrams of pure THC and gave them to willing friends at a party. Their reactions, from nonstop laughter, to lethargy, to talkativeness, confirmed that THC was a psychotropic cannabinoid.

It wasn't until 1992 that researchers discovered endocannabinoids produced naturally in the body. Since then, several other endocannabinoids have been identified, but not all have known functions.

Cannabinoids bind to two types of receptors in the body - one that is found predominantly in the nervous system and one in the immune system, Das said.

"Some cannabinoids, such as THC in marijuana or endocannabinoids can bind to these receptors and elicit anti-inflammatory and anti-pain action," she said.

"Our team discovered an enzymatic pathway that converts omega-3-derived endocannabinoids into more potent anti-inflammatory molecules that predominantly bind to the receptors found in the immune system," Das said. "This finding demonstrates how omega-3 can produce some of the same medicinal qualities as marijuana, but without a psychotropic effect."


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More information: Daniel R. McDougle et al, Anti-inflammatory ω-3 endocannabinoid epoxides, Proceedings of the National Academy of Sciences (2017). DOI: 10.1073/pnas.1610325114
Citation: Omega-3 fatty acids fight inflammation via cannabinoids (2017, July 18) retrieved 22 July 2019 from https://medicalxpress.com/news/2017-07-omega-fatty-acids-inflammation-cannabinoids.html
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