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- W2118766787 abstract "The human placenta oxidizes several xenobiotics, although the spectrum of substrates and metabolic activities when compared with the liver appears somewhat restricted. Maternal cigarette smoking or PCB exposure increases the expression of CYP1A1. This induced activity is able to catalyze the activation of benzo(a)pyrene (B(a)P) into DNA-bound products, both in vitro and in vivo. Studies on adult human liver bolster the concept that CYP1A1 and -1A2 are differentially expressed in hepatic and extrahepatic tissues. Studies with cDNA probe or enzyme specific antibodies and substrates for CYP2A, -2B, -2C, -2D, and -2E gene products have yielded negative results. There are only minimal activities that can be found in substantial quantities in placentas without maternal smoking; one example is 7-ethoxycoumarin O-deethylase (ECOD). Aromatase and cholesterol side-chain cleaving P450 mRNAs, proteins, and activities are measurable in human placentas and do not seem to be affected by maternal cigarette smoking." @default.
- W2118766787 created "2016-06-24" @default.
- W2118766787 creator A5062146319 @default.
- W2118766787 creator A5089567201 @default.
- W2118766787 date "1994-01-01" @default.
- W2118766787 modified "2023-10-12" @default.
- W2118766787 title "The Expression and Environmental Regulation of P450 Enzymes in Human Placenta" @default.
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