These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: Resolution and reconstitution of human placental monooxygenase activity responsive to maternal cigarette smoking. Author: Manchester DK, Jacoby EH. Journal: Dev Pharmacol Ther; 1982; 5(3-4):162-72. PubMed ID: 7151648. Abstract: Human placental cytochrome P-450 monooxygenase activity toward 7-ethoxyresorufin increases in response to maternal cigarette smoking and is specifically inhibited in vitro by 7,8-benzoflavone. Using a mixture of ionic and nonionic detergents we have solubilized placental cytochrome P-450 CO binding and cytochrome C reductase activities and separated them by anion exchange chromatography. Fractions containing cytochrome P-450 from placentas from smokers will catalyze 7,8-benzoflavone-inhibitable activity in reconstituted systems. SDS polyacryl-amide gel electrophoresis reveals proteins (molecular weight 70,000-40,000) in cytochrome P-450-containing fractions, derived from women who smoke, which are not detected in material from nonsmokers. These findings support the contention that placental response to maternal smoking involves induction of cytochrome P-450.[Abstract] [Full Text] [Related] [New Search]