Animal subcellular fractions, such as microsomes, S9, and cytosol, are used in preclinical drug development as in vitro test systems in assays predictive of a drug candidate’s behavior in vivo. These assays, using canine cells or pooled subcellular fractions as test systems, can specifically provide information on canine hepatic and extrahepatic metabolism of a drug compound as part of its ADME (absorption, distribution, metabolism, and excretion) profile or for species comparison to inform later definitive in vitro or in vivo ADME and drug-drug interaction (DDI) studies.
Canine (Dog) Subcellular Fractions for In Vitro Assays in Preclinical Drug Development
We offer pooled microsomes, cytosol, and S9 fractions isolated from Beagle dog liver, intestine, kidney, and lung tissue. Other custom preparations of canine tissue may be available upon request.
We offer pooled cell fractions from dog cells isolated from Beagle dog liver tissue, demonstrating high enzyme activity levels. Options include matching microsomal, S9, and cytosolic fractions from male or female donor pools to minimize variation. We also offer dog liver microsomes treated with prototypical inducers for use as a positive control in ex vivo enzyme induction or other drug metabolism studies.
Find pooled dog kidney cell fractions demonstrating high enzyme activity for your in vitro assays. Each preparation is isolated from male Beagle dog renal tissue; options include matching microsomal, S9, and cytosolic fractions to minimize variation between assays using different test systems.
Make sure your canine microsomes and S9 fractions are properly activated
For best results from assays using microsomes and S9 fractions, we recommend using NADPH regeneration to support high metabolism levels by ensuring that the NADPH levels are not a limiting factor in your incubations. Our preferred system, RapidStartTM, uses an enzymatic reaction that converts NADP to NADPH, which is then used as a cofactor by CYPs and oxidized back to NADP, and the cycle continues ensuring stable NADPH levels throughout the incubation. RapidStartTM NADPH regeneration is easily activated by simply adding water. Our easy-to-use formula is the most convenient and flexible NADPH regenerating system you’ll find, allowing users to easily tailor the system’s capability by simply varying the amount of water added. RapidStartTM is perfect for long- and short-term incubations and supports the function of recombinant enzymes and subcellular fractions, allowing you to achieve the most accurate and reliable data during your in vitro assays.
Don’t see what you need? Other animal cell fractions can be made available!
If you require canine hepatic or extrahepatic subcellular test systems not available through our standard product offerings, Custom Subcellular Preparations can be easily ordered to meet the specific needs of your study.
Our designated Custom Products team regularly prepares and isolates cells and/or subcellular fractions from more than 45 different species and has capabilities to meet unique needs that are unavailable through most vendors– non-standard rodent strains, farm animals, insects, precarious tissue isolations such as adrenal gland or jejunum. Our specialists can carry out over 40 characterization assays, providing the end-user with a good foundation for their DMPK assays. See our Custom Products page for examples of past custom preparations or get in touch with a specialist to find out how we can meet your needs.