Species Differences in the Response of Liver Drug-Metabolizing Enzymes to (S)-4-O-Tolylsulfanyl-2-(4-trifluormethyl-phenoxy)-butyric Acid (EMD 392949) in Vivo and in Vitro

2008 ◽  
Vol 36 (4) ◽  
pp. 702-714 ◽  
Author(s):  
Lysiane Richert ◽  
Gregor Tuschl ◽  
Catherine Viollon-Abadie ◽  
Nadège Blanchard ◽  
Alexandre Bonet ◽  
...  
Keyword(s):  
Butyric Acid ◽  
Species Differences ◽  
Drug Metabolizing Enzymes ◽  
Metabolizing Enzymes

scholarly journals Evaluation of human primary intestinal monolayers for drug metabolizing capabilities

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Jennifer E. Speer ◽  
Yuli Wang ◽  
John K. Fallon ◽  
Philip C. Smith ◽  
Nancy L. Allbritton
Keyword(s):  
Phase I ◽  
Intestinal Epithelium ◽  
Brush Border ◽  
Functional Group ◽  
Drug Metabolizing Enzymes ◽  
Metabolizing Enzymes ◽  
Brush Border Enzymes ◽  
In Cells

Abstract Background The intestinal epithelium is a major site of drug metabolism in the human body, possessing enterocytes that house brush border enzymes and phase I and II drug metabolizing enzymes (DMEs). The enterocytes are supported by a porous extracellular matrix (ECM) that enables proper cell adhesion and function of brush border enzymes, such as alkaline phosphatase (ALP) and alanyl aminopeptidase (AAP), phase I DMEs that convert a parent drug to a more polar metabolite by introducing or unmasking a functional group, and phase II DMEs that form a covalent conjugate between a functional group on the parent compound or sequential metabolism of phase I metabolite. In our effort to develop an in vitro intestinal epithelium model, we investigate the impact of two previously described simple and customizable scaffolding systems, a gradient cross-linked scaffold and a conventional scaffold, on the ability of intestinal epithelial cells to produce drug metabolizing proteins as well as to metabolize exogenously added compounds. While the scaffolding systems possess a range of differences, they are most distinguished by their stiffness with the gradient cross-linked scaffold possessing a stiffness similar to that found in the in vivo intestine, while the conventional scaffold possesses a stiffness several orders of magnitude greater than that found in vivo. Results The monolayers on the gradient cross-linked scaffold expressed CYP3A4, UGTs 2B17, 1A1 and 1A10, and CES2 proteins at a level similar to that in fresh crypts/villi. The monolayers on the conventional scaffold expressed similar levels of CYP3A4 and UGTs 1A1 and 1A10 DMEs to that found in fresh crypts/villi but significantly decreased expression of UGT2B17 and CES2 proteins. The activity of CYP3A4 and UGTs 1A1 and 1A10 was inducible in cells on the gradient cross-linked scaffold when the cells were treated with known inducers, whereas the CYP3A4 and UGT activities were not inducible in cells grown on the conventional scaffold. Both monolayers demonstrate esterase activity but the activity measured in cells on the conventional scaffold could not be inhibited with a known CES2 inhibitor. Both monolayer culture systems displayed similar ALP and AAP brush border enzyme activity. When cells on the conventional scaffold were incubated with a yes-associated protein (YAP) inhibitor, CYP3A4 activity was greatly enhanced suggesting that mechano-transduction signaling can modulate drug metabolizing enzymes. Conclusions The use of a cross-linked hydrogel scaffold for expansion and differentiation of primary human intestinal stem cells dramatically impacts the induction of CYP3A4 and maintenance of UGT and CES drug metabolizing enzymes in vitro making this a superior substrate for enterocyte culture in DME studies. This work highlights the influence of mechanical properties of the culture substrate on protein expression and the activity of drug metabolizing enzymes as a critical factor in developing accurate assay protocols for pharmacokinetic studies using primary intestinal cells. Graphical abstract

In vivo and in vitro effect of chelating agents on drug metabolizing enzymes of the rat

1980 ◽  
Vol 6 (1) ◽  
pp. 25-28 ◽  
Author(s):  
R.R. Dalvi ◽  
C. McGowan ◽  
A. Ademoyero
Keyword(s):  
Chelating Agents ◽  
Drug Metabolizing Enzymes ◽  
Metabolizing Enzymes ◽  
Vitro Effect

scholarly journals Effect of 4-(4-Chlorobenzyl)pyridine on Rat Hepatic Microsomal Cytochrome P450 and Drug-Metabolizing Enzymes in Vivo and in Vitro.

2001 ◽  
Vol 24 (5) ◽  
pp. 505-509 ◽  
Author(s):  
Yasuna KOBAYASHI ◽  
Naomi OHSHIRO ◽  
Tadanori SASAKI ◽  
Shogo TOKUYAMA ◽  
Takashi TOBE ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Drug Metabolizing Enzymes ◽  
Metabolizing Enzymes ◽  
Microsomal Cytochrome ◽  
Microsomal Cytochrome P450

scholarly journals In Vitro and in Vivo Effects of Three Different Mitragyna speciosa Korth Leaf Extracts on Phase II Drug Metabolizing Enzymes—Glutathione Transferases (GSTs)

Molecules ◽  
2010 ◽  
Vol 15 (1) ◽  
pp. 432-441 ◽  
Author(s):  
Juzaili Azizi ◽  
Sabariah Ismail ◽  
Mohd Nizam Mordi ◽  
Surash Ramanathan ◽  
Mohd Ikram Mohd Said ◽  
...  
Keyword(s):  
Phase Ii ◽  
Glutathione Transferases ◽  
Drug Metabolizing Enzymes ◽  
Leaf Extracts ◽  
Metabolizing Enzymes ◽  
Mitragyna Speciosa ◽  
In Vivo Effects
Sign in / Sign up

Export Citation Format

Share Document