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Prediction of intracellular exposure bridges the gap between target- and cell-based drug discovery.


ABSTRACT: Inadequate target exposure is a major cause of high attrition in drug discovery. Here, we show that a label-free method for quantifying the intracellular bioavailability (Fic) of drug molecules predicts drug access to intracellular targets and hence, pharmacological effect. We determined Fic in multiple cellular assays and cell types representing different targets from a number of therapeutic areas, including cancer, inflammation, and dementia. Both cytosolic targets and targets localized in subcellular compartments were investigated. Fic gives insights on membrane-permeable compounds in terms of cellular potency and intracellular target engagement, compared with biochemical potency measurements alone. Knowledge of the amount of drug that is locally available to bind intracellular targets provides a powerful tool for compound selection in early drug discovery.

SUBMITTER: Mateus A 

PROVIDER: S-EPMC5544291 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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Prediction of intracellular exposure bridges the gap between target- and cell-based drug discovery.

Mateus André A   Gordon Laurie J LJ   Wayne Gareth J GJ   Almqvist Helena H   Axelsson Hanna H   Seashore-Ludlow Brinton B   Treyer Andrea A   Matsson Pär P   Lundbäck Thomas T   West Andy A   Hann Michael M MM   Artursson Per P  

Proceedings of the National Academy of Sciences of the United States of America 20170712 30


Inadequate target exposure is a major cause of high attrition in drug discovery. Here, we show that a label-free method for quantifying the intracellular bioavailability (F<sub>ic</sub>) of drug molecules predicts drug access to intracellular targets and hence, pharmacological effect. We determined F<sub>ic</sub> in multiple cellular assays and cell types representing different targets from a number of therapeutic areas, including cancer, inflammation, and dementia. Both cytosolic targets and ta  ...[more]

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