Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/ijms22010013
Keywords
epoxide hydrolase; EPHX; mEH; sEH; fatty acids; genetics
Funding
- Mairie de Paris (Emergences)
- Societe Francophone du Diabete (SFD)
- Institute of Cardiometabolism and Nutrition (ICAN)
- Fondation pour la Recherche Medicale (FRM) [ARF20170938613, EQU202003010517]
- FRM [EQU201903007868]
- Saint-Antoine Research Center
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Epoxide hydrolases (EHs) are key enzymes involved in the detoxification of xenobiotics and biotransformation of endogenous epoxides, orchestrating crucial signaling pathways for cell homeostasis. The EH family comprises 5 proteins and 2 candidate members, with the best-known EHs being EPHX1 and EPHX2, which have wide expression patterns and multiple functions, leading to the development of specific inhibitors. Studies on pathogenicity of variants in EH genes are ongoing, highlighting the pleiotropic role of EHs in various disorders.
Epoxide hydrolases (EHs) are key enzymes involved in the detoxification of xenobiotics and biotransformation of endogenous epoxides. They catalyze the hydrolysis of highly reactive epoxides to less reactive diols. EHs thereby orchestrate crucial signaling pathways for cell homeostasis. The EH family comprises 5 proteins and 2 candidate members, for which the corresponding genes are not yet identified. Although the first EHs were identified more than 30 years ago, the full spectrum of their substrates and associated biological functions remain partly unknown. The two best-known EHs are EPHX1 and EPHX2. Their wide expression pattern and multiple functions led to the development of specific inhibitors. This review summarizes the most important points regarding the current knowledge on this protein family and highlights the particularities of each EH. These different enzymes can be distinguished by their expression pattern, spectrum of associated substrates, sub-cellular localization, and enzymatic characteristics. We also reevaluated the pathogenicity of previously reported variants in genes that encode EHs and are involved in multiple disorders, in light of large datasets that were made available due to the broad development of next generation sequencing. Although association studies underline the pleiotropic and crucial role of EHs, no data on high-effect variants are confirmed to date.
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