Humanized Gut CYP3A4 Mouse

Model Description

• This model carries disruptions or deletions of all eight full-length mouse Cyp3a genes identified as well as a transgene encoding human CYP3A4 under the control of a gut-specific promoter (mouse villin)
• Contains two targeted regions, a single gene knockout of the Cyp3a13 gene, and a cre-mediated deletion of the following gene cluster: Cyp3a11, Cyp3a16, Cyp3a25, Cyp3a41, Cyp3a44, Cyp3a57, Cyp3a58-ps, Cyp3a59
• In humans, CYP3A enzymes metabolize most drugs
• Intestinal expression of CYP3A enzymes in humans can cause significant intestinal metabolism of compounds, resulting in impaired drug absorption
• This model may be used to determine the contribution of intestinal metabolism to the absorption and distribution of a test article
• Model 9011 serves as the knockout control
• May be used with model 9048, which has liver-specific expression of human CYP3A4, to compare the contributions of gut versus liver metabolism to the biotransformation of a test article

Origin:
The Gut Humanized CYP3A4 Mouse was developed by Alfred Schinkel at the Netherlands Cancer Institute. The model was generated by targeting of the Cyp3a13 gene in 129P2/OlaHsd-derived E14 ES cells to replace the putative promoter region and exons 1 and 2 with a Pgk-hygromycin cassette. Targeted ES cells were injected into blastocysts. Resultant chimeras were backcrossed to FVB/N for at least seven generations. To generate the cluster deletion, the intronic sequence between exon 2 and 3 of Cyp3a57 was replaced with a neo cassette containing a loxP site, and a hygromycin cassette with a loxP site was inserted downstream of the Cyp3a59 gene in 129P2/OlaHsd-derived E14 ES cells through gene targeting. Transfection of the ES cells with cre recombinase resulted in the deletion of Cyp3a57, Cyp3a16, Cyp3a41, Cyp3a44, Cyp3a11, Cyp3a25 and Cyp3a59. The targeted ES cells were injected into blastocysts. Resultant chimeras were backcrossed two generations to FVB/N. Mice with the cluster deletion were then backcrossed to the Cyp3a13 targeted mutation line for at least four generations to generate a model with disruption or deletion of all eight full-length mouse Cyp3a genes. The Tg(Vil1-CYP3A4)1Ahs transgene was generated by microinjection into FVB/N zygotes. The Cyp3a knockout line was backcrossed to the Tg(Vil1-CYP3A4)1Ahs line for at least three generations. Taconic received stock in 2008, and the line was embryo transfer derived by mating male and female mice homozygous for both targeted regions and homozygous for the transgene. The line is maintained by mating male and females homozygous for the Cyp3a13 disruption, the cluster deletion and the transgene.

Color: Albino

Initial Publication:
van Herwaarden AE, Wagenaar E, van der Kruijssen CM, van Waterschoot RA, Smit JW, Song JY, van der Valk MA, van Tellingen O, van der Hoorn JW, Rosing H, Beijnen JH, Schinkel AH. (2007) Knockout of cytochrome P450 3A yields new mouse models for understanding xenobiotic metabolism. J Clin Invest 117(11):3583-92.

Additional Publications:
van Waterschoot RAB, Rooswinkel RW, Sparidans RW, van Herwaarden AE, Beijnen JH, Schinkel AH (2009). Inhibition and stimulation of intestinal and hepatic CYP3A activity: studies in humanized CYP3A4 transgenic mice using triazolam. Drug Metab Disp 37:2305-2313.

van Waterschoot RAB, Rooswinkel RW, Waagenar E, van der Kruijssen CMM, van Herwaarden AE, Schinkel AH (2009). Intestinal cytochrome P450 3A plays an important role in the regulation of detoxifying systems in the liver. FASEB J 23(1): 224-231.

van Waterschoot RAB, ter Heine R, Waagenar E, van der Kruijssen CMM, Rooswinkel RW, Huitema ADR, Beijnen JH, Schinkel AH (2010). Effects of cytochrome P450 3A (CYP3A) and the drug transporters P-glycoprotein (MDR1/ABCB1) and MRP2 (ABCC2) on the pharmacokinetics of lopinavir. Br J Pharmacol 160(5):1224-1233.

Animal Diet: NIH #31M Rodent Diet

Licensing Requirements:

Label License: Conditions of Use - Model 9047
This Model is produced and distributed under rights to patents and intellectual property owned by Taconic or licensed from various institutions. Taconic sells this model to purchaser, and grants to each purchaser a right under Taconic's own or sublicensable rights in such licensed patents and intellectual property to use the purchased Model in consideration of purchasers' acknowledgement of and agreement to the Terms and Conditions of Sale and the following terms of use:

• Title to this Model and biological materials derived from it remains with TACONIC FARMS, INC.
• The Model will be used for research purposes only.
• The Model will not be bred except to obtain embryos or fetuses required for research purposes
• The Model and biological materials derived from it will not be distributed to third parties or used for commercial purposes
• Non-profit purchasers may not use this Model and/or biological materials derived from it in sponsored research or contract research studies unless it is purchased at the for-profit price.

Pricing for non-profit users (excluding users at non-profit foundations which are affiliated with a for-profit entity):

9047

Humanized Gut CYP3A4 Mouse European prices for non-profit users

Pricing for for-profit users (including users at non-profit foundations which are affiliated with a for-profit entity):

9047

Humanized Gut CYP3A4 Mouse European prices for for-profit users

Availability: Immediate availability of appropriately-sized cohorts.

Related Reports

View the production locations(s) and the accompanying current IHMS^TM Health Report and Taconic Health Standard for this model

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