- Characterization of the fatty acid amide hydrolase inhibitor cyclohexyl carbamic acid 3′-carbamoyl-biphenyl-3-yl ester (URB597): Effects on anandamide and oleoylethanolamide deactivation
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Fatty acid amide hydrolase (FMH) is an intracellular serine enzyme that catalyzes the hydrolysis of bioactive fatty acid ethanolamides such as anandamide and oleoylethanolamide (OEA). Genetic deletion of the faah gene in mice elevates brain anandamide levels and amplifies the effects of this endogenous cannabinoid agonist. Here, we show that systemic administration of the selective FAAH inhibitor URB597 (cyclohexyl carbamic acid 3′-carbamoyl-biphenyl-3-yl ester; 0.3 mg/kg i.p.) increases anandamide levels in the brain of rats and wild-type mice but has no such effect in FAAH-null mutants. Moreover, URB597 enhances the hypothermic actions of anandamide (5 mg/kg i.p.) in wild-type mice but not in FAAH-null mice. In contrast, the FAAH inhibitor does not affect anandamide or OEA levels in the rat duodenum at doses that completely inhibit FAAH activity. In addition, URB597 does not alter the hypophagic response elicited by OEA (5 and 10 mg/kg i.p.), which is mediated by activation of peroxisome proliferator-activated receptor type-α. Finally, exogenously administered OEA (5 mg/kg i.p.) was eliminated at comparable rates in wild-type and FAAH-/- mice. Our results indicate that URB597 increases brain anandamide levels and magnifies anandamide responses by inhibiting intracellular FAAH activity. The results also suggest that an enzyme distinct from FAAH catalyzes OEA hydrolysis in the duodenum, where this lipid substance acts as a local satiety factor. Copyright
- Fegley, Darren,Gaetani, Silvana,Duranti, Andrea,Tontini, Andrea,Mor, Marco,Tarzia, Giorgio,Piomelli, Daniele
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- Radiosynthesis and evaluation of [11C-carbonyl ]-labeled carbamates as fatty acid amide hydrolase radiotracers for positron emission tomography
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Fatty acid amide hydrolase (FAAH) plays a key role in regulating the tone of the endocannabinoid system. Radiotracers are required to image and quantify FAAH activity in vivo. We have synthesized a series of potent FAAH inhibitors encompassing two classes of N-alkyl-O-arylcarbamates and radiolabeled eight of them with carbon-11. The [11C-carbonyl]-radiotracers were evaluated in vitro and ex vivo in rats as potential FAAH imaging agents for positron emission tomography (PET). Both sets of [11C]O-arylcarbamates showed good to excellent brain penetration and an appropriate regional distribution. Pretreatments with a FAAH inhibitor demonstrated that 80-95% of brain uptake of radioactivity constituted binding of the radiotracers to FAAH. Brain extraction measurements showed that binding to FAAH was irreversible and kinetically different for the two classes of carbamates. These promising results are discussed in terms of the requirements of a suitable radiotracer for the in vivo imaging of FAAH using PET.
- Wilson, Alan A.,Hicks, Justin W.,Sadovski, Oleg,Parkes, Jun,Tong, Junchao,Houle, Sylvain,Fowler, Christopher J.,Vasdev, Neil
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p. 201 - 209
(2013/03/14)
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- MODULATION OF ANXIETY THROUGH BLOCKADE OF ANANDAMIDE HYDROLYSIS
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Fatty acid amide hydrolase inhibitors of the Formula (I) are provided, wherein X is NH, CH2, O, or S; Q is O or S; Z is O or N; R is an aromatic moiety selected from the group consisting of substituted or unsubstituted aryl; substituted or unsubstituted b
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Page 59; 60 - 61
(2008/06/13)
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- Cyclohexylcarbamic acid 3′- or 4′-substituted biphenyl-3-yl esters as fatty acid amide hydrolase inhibitors: Synthesis, quantitative structure-activity relationships, and molecular modeling studies
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Fatty acid amide hydrolase (FAAH) is a promising target for modulating endocannabinoid and fatty acid ethanolamide signaling, which may have important therapeutic potential. We recently described a new class of O-arylcarbamate inhibitors of FAAH, includin
- Mor, Marco,Rivara, Silvia,Lodola, Alessio,Plazzi, Pier Vincenzo,Tarzia, Giorgio,Duranti, Andrea,Tontini, Andrea,Piersanti, Giovanni,Kathuria, Satish,Piomelli, Daniele
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p. 4998 - 5008
(2007/10/03)
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