Induction of hepatic microsomal P450 by 4-phenylalkylpyridines in rat: chain length-dependent and sex-related differential induction of P450s
- 1 January 1995
- journal article
- research article
- Published by Taylor & Francis in Xenobiotica
- Vol. 25 (8) , 779-789
- https://doi.org/10.3109/00498259509061893
Abstract
1. The effects of 4-phenylalkylpyridines (chain length of 0-5, 7, 9 and 11 carbon atoms) on the induction of hepatic microsomal P450 and its multiple forms (1A1/2 (1A1, 1A2), 3A2, 2B1/2, 2C6 and 2E1) in the male and female rat have been investigated. 2. P450 induction gradually declined with increasing chain length of the 4-phenylalkylpyridines. 3. Immunoblot analysis revealed that three pyridine compounds having methylene units of 0, 1 and 2 only induced P4501A2, whereas those having 4, 5 or 7 methylene units only induced 1A1 in the male rat. 4. In the female rat, however, we could not observe such a chain length-dependent differential induction of the P4501A subfamily. 5. Induced levels of P4503A2 and 2E1 were dependent on total P450 specific content, but 2C6 was increased in a chain length-dependent manner in both sexes. 6. These results provide new information on the differential effects of pyridine-containing compounds on P450 induction in the rat.Keywords
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