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Related Concept Videos

Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance01:07

Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance

Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
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In the liver and bile canaliculi, influx and efflux transporters modification can influence intrinsic clearance. Transporters play a significant role in moving drugs within liver cells. Elaborate models, such as the Biopharmaceutical Classification System (BCS), are essential to relate transporters to drug disposition. This system categorizes drugs into four classes based on solubility and permeability, providing insights into elimination routes and the effects of transporters following oral...
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Models and Methods to Evaluate Transport of Drug Delivery Systems Across Cellular Barriers
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Published on: October 17, 2013

Future directions for drug transporter modelling.

S Ekins1, G F Ecker, P Chiba

  • 1Collaborations in Chemistry, Jenkintown, PA, USA. ekinssean@yahoo.com

Xenobiotica; the Fate of Foreign Compounds in Biological Systems
|October 31, 2007
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Summary

Computational models like QSAR and pharmacophore screening accelerate drug discovery by predicting transporter interactions, reducing the need for extensive lab studies. This approach aids in identifying drug candidates and anticipating drug-drug interactions.

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Area of Science:

  • Computational chemistry
  • Drug discovery
  • Pharmacology

Background:

  • Since the late 1980s, computational methods have increasingly been used to study drug-transporter interactions, beginning with P-glycoprotein (P-gp).
  • Identifying molecules interacting with transporters like P-gp is crucial for drug discovery but typically requires time-consuming in vitro and in vivo experiments.

Purpose of the Study:

  • To highlight the utility of computational quantitative structure-activity relationship (QSAR) and pharmacophore models in predicting drug-transporter interactions.
  • To demonstrate how these computational approaches can expedite the identification of novel drug substrates and inhibitors for transporters.

Main Methods:

  • Application of quantitative structure-activity relationship (QSAR) and pharmacophore modeling.
  • Rapid screening of molecular databases to identify potential transporter substrates or inhibitors.
  • Verification of computational predictions through in vitro studies.

Main Results:

  • Computational models enable rapid screening of large molecule databases, identifying potential binders for transporters.
  • The use of these models has led to the discovery of new substrates and inhibitors for various transporters.
  • Accurate predictions of transporter binding by computational and pharmacophore models can anticipate drug-drug interactions.

Conclusions:

  • Computational QSAR and pharmacophore models offer an efficient alternative to traditional methods for assessing drug-transporter interactions.
  • These models can accelerate drug discovery by prioritizing molecules for experimental validation and predicting potential drug-drug interactions.
  • Future integration of these computational approaches into pharmacokinetic-pharmacodynamic models may enhance predictions of in vivo drug effects.