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Weber, A. et al.

Weber, Ni, Ling, Acheampong, Tang-Liu, Burk, Cravatt, Woodward,

Formation of prostamides from anandamide in FAAH knockout mice analyzed by HPLC with tandem mass spectrometry.

We investigated the formation of PGF(2alpha) 1-ethanolamide, PGE(2) 1-ethanolamide, and PGD(2) 1-ethanolamide (prostamides F(2alpha), E(2), and D(2), respectively) in liver, lung, kidney, and small intestine after a single intravenous bolus administration of 50 mg/kg of anandamide to normal and fatty acid amide hydrolase knockout ( FAAH -/-) male mice. One group of three normal mice was not dosed (naÃ¯ve) while another group of three normal mice received a bolus intravenous injection of 50 mg/kg of anandamide. Three FAAH -/- mice also received an intravenous injection of 50 mg/kg of anandamide. After 30 min, the lung, liver, kidney, and small intestine were harvested and processed by liquid-liquid extraction. The concentrations of prostamide F(2alpha), prostamide E(2), prostamide D(2), and anandamide were determined by HPLC-tandem mass spectrometry. Prostamide F(2alpha) was detected in tissues in FAAH -/- mice after administration of anandamide. Concentrations of anandamide, prostamide E(2), and prostamide D(2) in liver, kidney, lung, and small intestine were much higher in the anandamide-treated FAAH -/- mice than those of the anandamide-treated control mice. This report demonstrates that prostamides, including prostamide F(2alpha), were formed in vivo from anandamide, potentially by the cyclooxygenase-2 pathway when the competing FAAH pathway is lacking.[1]

References

Formation of prostamides from anandamide in FAAH knockout mice analyzed by HPLC with tandem mass spectrometry. Weber, A., Ni, J., Ling, K.H., Acheampong, A., Tang-Liu, D.D., Burk, R., Cravatt, B.F., Woodward, D. J. Lipid Res. (2004) [Pubmed]

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