Soluble epoxide hydrolase (sEH) catalyzes the conversion of epoxyeicosatrienoic acids (EpETrEs) to the corresponding DiHETrEs thereby diminishing their vasodilator activity.1 Inhibitors of sEH may therefore have clinical utility for treating hypertension and systemic inflammation.2,3 Epoxy fluor 7 is a sensitive fluorescent substrate for sEH that can be used to monitor the activity of both human and murine enzymes.4 Hydrolysis of the substrate epoxide yields a highly fluorescent product that can be monitored at excitation and emission wavelengths of 330 and 465 nm, respectively. Epoxy fluor 7 is more stable in aqueous solution and offers about 2-fold better sensitivity than previously used colorimetric substrates such as NEPC.4
1
Yu, Z., Xu, F., Huse, L.M., et al. Soluble epoxide hydrolase regulates hydrolysis of vasoactive epoxyeicosatrienoic acids. Circ Res87992-998(2000).
2
Imig, J.D., Zhao, X., Zaharis, C.Z., et al. An orally active epoxide hydrolase inhibitor lowers blood pressure and provides renal protection in salt-sensitive hypertension. Hypertension46(2)975-981(2005).
3
Schmelzer, K.R., Kubala, L., Newman, J.W., et al. Soluble epoxide hydrolase is a therapeutic target for acute inflammation. Proc Natl Acad Sci USA102(28)9772-9777(2005).
4
Jones, P.D., Wolf, N.M., Morisseau, C., et al. Fluorescent substrates for soluble epoxide hydrolase and application to inhibition studies. Anal Biochem34366-75(2005).
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COc1ccc2cc(ccc2c1)C(CN)OC(=O)OCC1OC1c1ccccc1
Background Reading
Jones, P.D., Wolf, N.M., Morisseau, C., et al. Fluorescent substrates for soluble epoxide hydrolase and application to inhibition studies. Anal Biochem34366-75(2005).
Imig, J.D., Zhao, X., Zaharis, C.Z., et al. An orally active epoxide hydrolase inhibitor lowers blood pressure and provides renal protection in salt-sensitive hypertension. Hypertension46(2)975-981(2005).
Schmelzer, K.R., Kubala, L., Newman, J.W., et al. Soluble epoxide hydrolase is a therapeutic target for acute inflammation. Proc Natl Acad Sci USA102(28)9772-9777(2005).
Yu, Z., Xu, F., Huse, L.M., et al. Soluble epoxide hydrolase regulates hydrolysis of vasoactive epoxyeicosatrienoic acids. Circ Res87992-998(2000).