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Abstract

Metabolism of lovastatin by rat and human liver microsomes in vitro.

M D Greenspan, J B Yudkovitz, A W Alberts, L S Argenbright, B H Arison and J L Smith
Drug Metabolism and Disposition September 1988, 16 (5) 678-682;
M D Greenspan
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J B Yudkovitz
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A W Alberts
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L S Argenbright
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B H Arison
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J L Smith
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Abstract

The metabolism of lovastatin (Mevacor) was examined using isolated microsomes derived from the livers of normal and phenobarbital-treated rats and from human liver samples. Incubation of lovastatin with rat liver microsomes resulted in the formation of several polar metabolites of lovastatin. The metabolites were isolated by HPLC and identified by NMR and mass spectrometry. One fraction consisted of a 2:1 mixture of 6-hydroxy-lovastatin and the rearrangement product delta 4,5-3-hydroxy lovastatin. Addition of a trace of acid to this mixture resulted in the formation of a single aromatized product, the desacyl-delta 4a,6,8-dehydro analog of lovastatin. Another microsomal metabolite was determined to be the delta 4,8a,1-3-hydroxy-lovastatin derivative. The chromatographic pattern of metabolites produced from lovastatin by human liver microsomes was similar to that obtained with rat liver microsomes. Metabolism of lovastatin by rat liver microsomes was both time and concentration dependent; optimal microsomal metabolism occurred with 0.1 mM lovastatin, whereas higher lovastatin concentrations inhibited the reaction. The open acid form of lovastatin was poorly metabolized by both the rat and the human liver microsomes.

 

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Drug Metabolism and Disposition
Vol. 16, Issue 5
1 Sep 1988
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Abstract

Metabolism of lovastatin by rat and human liver microsomes in vitro.

M D Greenspan, J B Yudkovitz, A W Alberts, L S Argenbright, B H Arison and J L Smith
Drug Metabolism and Disposition September 1, 1988, 16 (5) 678-682;

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Abstract

Metabolism of lovastatin by rat and human liver microsomes in vitro.

M D Greenspan, J B Yudkovitz, A W Alberts, L S Argenbright, B H Arison and J L Smith
Drug Metabolism and Disposition September 1, 1988, 16 (5) 678-682;
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