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Human Lung Microsomes, S9, and Cytosol for Preclinical Drug Development

As the primary site for entrance of aerosolized agents and as the recipient of all cardiac output, lungs play a significant role in both first-pass and systemic metabolism of xenobiotics.

We offer matching (from the same donor pool) pulmonary subcellular fractions including microsomes, S9, and cytosol from human donors. Some studies can yield different results between assays using smoking and non-smoking donors due to differences in enzymatic activity, so we offer subcellular fraction options from both smoking and non-smoking donors. Lung microsomes are supplied in 250 mM sucrose buffer, S9 and cytosolic fractions are supplied in 50 mM Tris-HCL (pH 7.4 at 4° C) containing 150 mM KCl and 2 mM EDTA.

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Available Subcellular Fraction Options

Make sure your 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 preparations can be made available!

If you require 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.

Isolation of rabbit liver microsomes: Tissue > Homogenate > S9 > Cytosol > Microsomes

Access more details about extrahepatic subcellular fraction preparations

For more information about how our product specialists ensure quality inHuman lung subcellular preparations, as well as enzyme activity characterization assays, refer to pages 79-85 in our Product Tech Guide

Subcellular fraction in vitro test systems prep

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Access more details about our capabilities, characterization of subcellular fractions, safety, handling and storage, and more

Laboratory microsome S9 cytosol preparation