Biomaterial Database

Induction of rat hepatic cytochrome P450 enzymes by myristicin. 1995

H G Jeong, and C H Yun

Department of Environmental Science, Chosun University, Kwangju, Korea.

The effect of myristicin on the expression of liver cytochrome P450s and its mRNA levels was examined in rats. Treatment of rats with myristicin (i.p., 500 mumol/kg) caused 2-20 fold increases in liver P450 1A1/2, 2B1/2, and 2E1 enzyme activities relative to controls. Immunoblot analysis using anti-rat liver P450 1A, 2B, and 2E1 showed that the increases in each of P450 protein levels by myristicin were consistent with those in enzyme activity levels. When increased levels of P450 mRNA by myristicin were examined by Northern blot analysis, levels of mRNA of P450 1A1/2 and 2B1/2 also increased. However, the level of P4502E1 mRNA did not increase. The total amount of spectrally detectable P450, also increased about 1.5-fold following treatment of myristicin. These results demonstrate that myristicin is an inducer of rat liver P450 1A1/2, 2B1/2, and 2E1, and that the induction involves increases in mRNA levels except in the case of P4502E1.

UI	MeSH Term	Description	Entries
D007527	Isoenzymes	Structurally related forms of an enzyme. Each isoenzyme has the same mechanism and classification, but differs in its chemical, physical, or immunological characteristics.	Alloenzyme,Allozyme,Isoenzyme,Isozyme,Isozymes,Alloenzymes,Allozymes
D008297	Male		Males
D008862	Microsomes, Liver	Closed vesicles of fragmented endoplasmic reticulum created when liver cells or tissue are disrupted by homogenization. They may be smooth or rough.	Liver Microsomes,Liver Microsome,Microsome, Liver
D011748	Pyrogallol	A trihydroxybenzene or dihydroxy phenol that can be prepared by heating GALLIC ACID.	1,2,3-Trihydroxybenzene,Pyrogallic acid,acid, Pyrogallic
D003577	Cytochrome P-450 Enzyme System	A superfamily of hundreds of closely related HEMEPROTEINS found throughout the phylogenetic spectrum, from animals, plants, fungi, to bacteria. They include numerous complex monooxygenases (MIXED FUNCTION OXYGENASES). In animals, these P-450 enzymes serve two major functions: (1) biosynthesis of steroids, fatty acids, and bile acids; (2) metabolism of endogenous and a wide variety of exogenous substrates, such as toxins and drugs (BIOTRANSFORMATION). They are classified, according to their sequence similarities rather than functions, into CYP gene families (>40% homology) and subfamilies (>59% homology). For example, enzymes from the CYP1, CYP2, and CYP3 gene families are responsible for most drug metabolism.	Cytochrome P-450,Cytochrome P-450 Enzyme,Cytochrome P-450-Dependent Monooxygenase,P-450 Enzyme,P450 Enzyme,CYP450 Family,CYP450 Superfamily,Cytochrome P-450 Enzymes,Cytochrome P-450 Families,Cytochrome P-450 Monooxygenase,Cytochrome P-450 Oxygenase,Cytochrome P-450 Superfamily,Cytochrome P450,Cytochrome P450 Superfamily,Cytochrome p450 Families,P-450 Enzymes,P450 Enzymes,Cytochrome P 450,Cytochrome P 450 Dependent Monooxygenase,Cytochrome P 450 Enzyme,Cytochrome P 450 Enzyme System,Cytochrome P 450 Enzymes,Cytochrome P 450 Families,Cytochrome P 450 Monooxygenase,Cytochrome P 450 Oxygenase,Cytochrome P 450 Superfamily,Enzyme, Cytochrome P-450,Enzyme, P-450,Enzyme, P450,Enzymes, Cytochrome P-450,Enzymes, P-450,Enzymes, P450,Monooxygenase, Cytochrome P-450,Monooxygenase, Cytochrome P-450-Dependent,P 450 Enzyme,P 450 Enzymes,P-450 Enzyme, Cytochrome,P-450 Enzymes, Cytochrome,Superfamily, CYP450,Superfamily, Cytochrome P-450,Superfamily, Cytochrome P450
D004148	Dioxolanes
D004790	Enzyme Induction	An increase in the rate of synthesis of an enzyme due to the presence of an inducer which acts to derepress the gene responsible for enzyme synthesis.	Induction, Enzyme
D000081248	Allylbenzene Derivatives	Compounds that include a single 1-phenyl-2-propene moiety in their structure.	1-Methyl-1-phenylethylene Derivatives,1-Phenyl-2-propene Derivatives,2-Propenylbenzene Derivatives,3-Ethenylmethylbenzene Derivatives,Allylbenzenes,Vinyl Toluene Derivatives
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001593	Benzyl Compounds	Benzene derivatives that contain a benzyl group with the general formula Phenyl-CH2-R.	Compounds, Benzyl