What is PBPKPlus™?
Physiologically based pharmacokinetics (PBPK) can be handled with the PBPKPlus Module. No equation-writing is required as you create a whole-body model to simulate the plasma and tissue concentration-time profiles. PBPKPlus extends GastroPlus to include distribution to and clearance from individual tissues. With the Metabolism and Transporter Module, any tissue can employ fixed (intrinsic clearance) or saturable (Michaelis-Menten) metabolism, and passive or saturable active transport (influx or efflux). Tissues can be defined as needed (as either a perfusion- or permeability-limited model), or default models can be used with a standard set of compartments:
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Adipose
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Arterial blood
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Brain
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Gut
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Heart
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Lungs
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Liver
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Muscle
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Skin
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Spleen
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Reproductive organs
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Venous blood
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Kidney
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Yellow marrow
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Red marrow
PBPKPlus also provides:
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Generation of physiological model parameters (tissue weights and volumes, perfusion rates, etc.) with our built-in PEAR Physiology™ (Population Estimates for Age-Related Physiology). Current options are:
- Human (American or Asian, male or female, based on age)
- Rat
- Dog
- Mouse
- Monkey
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Estimation of tissue partition coefficients from logP, plasma protein binding and pKa. GastroPlus includes all commonly used methods for the Kp estimates:
- Poulin
- Berezhkovskiy
- Rodgers & Rowland
- Rodgers & Rowland – Single (this is our modification of Rodgers & Rowland method for more general application)
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Accurate physiological models for Liver and Kidney tissues. Liver tissue allows for non-saturable or saturable secretion of drug into the bile through canalicular membrane. Kidney tissue includes glomerular filtration, possible drug reabsorption (passive or active) from kidney tubules, and possible drug metabolism by kidney tissue.
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Parameter Sensitivity Analysis of nearly all relevant physiological and physiochemical parameters.
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Virtual Trials (simulated clinical trials) based on parameters variances in a sample population
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Fitting model parameters to in vivo data in single or multiple compartments (Optimization Module required)
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Linking of pharmacodynamic (PD) effect models directly to drug concentrations in target tissues (PDPlus Module required)
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Report-quality plotted output of all time-dependent results in all tissues
For further information about licensing PBPKPlus, please contact:
Mr. John DiBella
Director, Marketing & Sales
661-723-7723 ext. 244
john.dibella@simulations-plus.com