Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/ijms23084407
Keywords
migraine; endocannabinoid; MAGL; FAAH; inhibition; nociceptors
Funding
- 2019 Migraine Research Foundation Impact Award
- Doctoral Program in Molecular Medicine (DPMM) of the University of Eastern Finland
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This thematic review discusses the potential use of inhibiting endocannabinoid-degrading enzymes to increase endocannabinoid levels and alleviate migraine pain. It also explores the migraine pain signaling pathways, the complex effects of endocannabinoids in pain modulation, and emerging inhibitors to target these pathways.
Migraine is a disabling neurovascular disorder characterized by severe pain with still limited efficient treatments. Endocannabinoids, the endogenous painkillers, emerged, alternative to plant cannabis, as promising analgesics against migraine pain. In this thematic review, we discuss how inhibition of the main endocannabinoid-degrading enzymes, monoacylglycerol lipase (MAGL) and fatty acid amide hydrolase (FAAH), could raise the level of endocannabinoids (endoCBs) such as 2-AG and anandamide in order to alleviate migraine pain. We describe here: (i) migraine pain signaling pathways, which could serve as specific targets for antinociception; (ii) a divergent distribution of MAGL and FAAH activities in the key regions of the PNS and CNS implicated in migraine pain signaling; (iii) a complexity of anti-nociceptive effects of endoCBs mediated by cannabinoid receptors and through a direct modulation of ion channels in nociceptive neurons; and (iv) the spectrum of emerging potent MAGL and FAAH inhibitors which efficiently increase endoCBs levels. The specific distribution and homeostasis of endoCBs in the main regions of the nociceptive system and their generation 'on demand', along with recent availability of MAGL and FAAH inhibitors suggest new perspectives for endoCBs-mediated analgesia in migraine pain.
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