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Decoding functional metabolomics with docosahexaenoyl ethanolamide (DHEA) identifies novel bioactive signals
Rong Yang1, Gabrielle Fredman, Sriram Krishnamoorthy
1Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Institutes of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.
The Journal of Biological Chemistry
|July 16, 2011
Summary
Novel compounds derived from docosahexaenoyl ethanolamide (DHEA) show potent anti-inflammatory and organ-protective effects by regulating leukocyte motility and preventing harmful cell aggregation. These findings highlight DHEA
Area of Science:
- Biochemistry
- Immunology
- Neuroscience
Background:
- Neuroinflammation and traumatic brain injury exacerbate tissue damage via inflammatory cell activation.
- Pro-inflammatory mediators amplify damage in neurological conditions.
Purpose of the Study:
- Identify novel bioactive lipid mediators derived from docosahexaenoyl ethanolamide (DHEA).
- Investigate the role of these mediators in regulating leukocyte function and inflammatory responses.
- Assess the therapeutic potential of these compounds in inflammatory conditions and organ injury.
Main Methods:
- Utilized LC-UV-MS-MS-based lipidomics for comprehensive lipid profiling.
- Employed single-cell level functional screening in microfluidic chambers.
- Assessed the agonist activity of identified compounds on CB2 receptors.
- Evaluated the effect of compounds on platelet-leukocyte aggregate formation in human whole blood.
- Determined the organ-protective effects of 15-HEDPEA in a mouse model of reperfusion injury.
Main Results:
- Identified novel DHEA-derived products, including 10,17-dihydroxydocosahexaenoyl ethanolamide (10,17-diHDHEA) and 15-hydroxy-16(17)-epoxy-docosapentaenoyl ethanolamide (15-HEDPEA).
- Both 10,17-diHDHEA and 15-HEDPEA demonstrated potent agonist activity at CB2 receptors.
- At picomolar concentrations, these compounds inhibited the formation of platelet-leukocyte aggregates.
- 15-HEDPEA exhibited significant organ protection in a mouse model of reperfusion injury.
Conclusions:
- Oxidative metabolism of DHEA generates novel, potent anti-inflammatory molecules.
- These DHEA derivatives, such as 10,17-diHDHEA and 15-HEDPEA, possess significant organ-protective properties.
- The identified compounds represent promising therapeutic candidates for neuroinflammation, traumatic brain injury, and related inflammatory conditions.
