Skip to main content
Advertisement

Main menu

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET

User menu

  • My alerts
  • Log in
  • My Cart

Search

  • Advanced search
Journal of Pharmacology and Experimental Therapeutics
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET
  • My alerts
  • Log in
  • My Cart
Journal of Pharmacology and Experimental Therapeutics

Advanced Search

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Visit jpet on Facebook
  • Follow jpet on Twitter
  • Follow jpet on LinkedIn
Research ArticleABSORPTION, DISTRIBUTION, METABOLISM, AND EXCRETION

Interdependent Effect of P-Glycoprotein-Mediated Drug Efflux and Intracellular Drug Binding on Intracellular Paclitaxel Pharmacokinetics: Application of Computational Modeling

Seong Hoon Jang, M. Guillaume Wientjes and Jessie L.-S. Au
Journal of Pharmacology and Experimental Therapeutics February 2003, 304 (2) 773-780; DOI: https://doi.org/10.1124/jpet.102.044172
Seong Hoon Jang
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
M. Guillaume Wientjes
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Jessie L.-S. Au
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Figures & Data
  • Info & Metrics
  • eLetters
  • PDF
Loading

Abstract

Intracellular concentration of paclitaxel is determined by the extracellular drug concentration, the level of the mdr1P-glycoprotein (Pgp), and binding to intracellular proteins including tubulins/microtubules. The present study used a computational method to examine the effects of these factors, singly and in combination, on intracellular paclitaxel pharmacokinetics. The study was performed using our previously described intracellular pharmacokinetic model. The parameters representing Pgp-mediated drug efflux and intracellular drug binding (i.e., number of Pgp and binding sites and binding affinity) were altered systematically and used to generate computer simulations depicting the intracellular paclitaxel pharmacokinetics at clinically relevant extracellular (e.g., plasma) drug concentrations. The simulation results indicate that all four factors played a role in determining the intracellular drug accumulation. The rank order of the importance of these parameters was extracellular drug concentration ≫ intracellular binding capacity > intracellular binding affinity > Pgp expression. The results further showed that omission of one or more of these factors in the experimental design would lead to erroneous conclusions on the importance of other factors, as simultaneous changes in more than one parameter altered the relative importance and offset the effects of other parameters. In summary, results of the present study demonstrate the use of computational modeling to depict the effects of biological parameters such as drug efflux transporters, drug binding sites, and binding affinity on intracellular accumulation and retention of drugs that bind to cellular components.

Footnotes

  • ↵1 Current Address: Office of Clinical Pharmacology and Biopharmaceutics, Center for Drug Evaluation and Research, Food and Drug Administration, 5600 Fishers Lane, Rockville, MD 20857.

  • This work was partly supported by Research Grants R37CA49816 and R01CA63363 from the National Cancer Institute, National Institutes of Health, Department of Health and Human Services.

  • DOI: 10.1124/jpet.102.044172

  • Abbreviations:
    mdr1
    multidrug resistance gene 1
    Pgp
    P-glycoprotein
    Jmax
    maximum efflux rate by Pgp per cell
    Bmax,c
    the number of saturable drug binding sites in cells
    Kd,c
    dissociation constants for drug binding to saturable binding sites in cells
    • Received September 13, 2002.
    • Accepted November 1, 2002.
  • The American Society for Pharmacology and Experimental Therapeutics
View Full Text

JPET articles become freely available 12 months after publication, and remain freely available for 5 years. 

Non-open access articles that fall outside this five year window are available only to institutional subscribers and current ASPET members, or through the article purchase feature at the bottom of the page. 

 

  • Click here for information on institutional subscriptions.
  • Click here for information on individual ASPET membership.

 

Log in using your username and password

Forgot your user name or password?

Purchase access

You may purchase access to this article. This will require you to create an account if you don't already have one.
PreviousNext
Back to top

In this issue

Journal of Pharmacology and Experimental Therapeutics: 304 (2)
Journal of Pharmacology and Experimental Therapeutics
Vol. 304, Issue 2
1 Feb 2003
  • Table of Contents
  • About the Cover
  • Index by author
Download PDF
Article Alerts
Sign In to Email Alerts with your Email Address
Email Article

Thank you for sharing this Journal of Pharmacology and Experimental Therapeutics article.

NOTE: We request your email address only to inform the recipient that it was you who recommended this article, and that it is not junk mail. We do not retain these email addresses.

Enter multiple addresses on separate lines or separate them with commas.
Interdependent Effect of P-Glycoprotein-Mediated Drug Efflux and Intracellular Drug Binding on Intracellular Paclitaxel Pharmacokinetics: Application of Computational Modeling
(Your Name) has forwarded a page to you from Journal of Pharmacology and Experimental Therapeutics
(Your Name) thought you would be interested in this article in Journal of Pharmacology and Experimental Therapeutics.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
Research ArticleABSORPTION, DISTRIBUTION, METABOLISM, AND EXCRETION

Interdependent Effect of P-Glycoprotein-Mediated Drug Efflux and Intracellular Drug Binding on Intracellular Paclitaxel Pharmacokinetics: Application of Computational Modeling

Seong Hoon Jang, M. Guillaume Wientjes and Jessie L.-S. Au
Journal of Pharmacology and Experimental Therapeutics February 1, 2003, 304 (2) 773-780; DOI: https://doi.org/10.1124/jpet.102.044172

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero

Share
Research ArticleABSORPTION, DISTRIBUTION, METABOLISM, AND EXCRETION

Interdependent Effect of P-Glycoprotein-Mediated Drug Efflux and Intracellular Drug Binding on Intracellular Paclitaxel Pharmacokinetics: Application of Computational Modeling

Seong Hoon Jang, M. Guillaume Wientjes and Jessie L.-S. Au
Journal of Pharmacology and Experimental Therapeutics February 1, 2003, 304 (2) 773-780; DOI: https://doi.org/10.1124/jpet.102.044172
del.icio.us logo Digg logo Reddit logo Twitter logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One

Jump to section

  • Article
    • Abstract
    • Materials and Methods
    • Results
    • Discussion
    • Footnotes
    • References
  • Figures & Data
  • Info & Metrics
  • eLetters
  • PDF

Related Articles

Cited By...

More in this TOC Section

  • Transport Is Not Rate-Limiting in Morphine Glucuronidation in the Single-Pass Perfused Rat Liver Preparation
  • Enhanced Hepatic Uptake and Bioactivity of Type α1(I) Collagen Gene Promoter-Specific Triplex-Forming Oligonucleotides after Conjugation with Cholesterol
  • Characterization of P-glycoprotein Inhibition by Major Cannabinoids from Marijuana
Show more ABSORPTION, DISTRIBUTION, METABOLISM, AND EXCRETION

Similar Articles

Advertisement
  • Home
  • Alerts
Facebook   Twitter   LinkedIn   RSS

Navigate

  • Current Issue
  • Fast Forward by date
  • Fast Forward by section
  • Latest Articles
  • Archive
  • Search for Articles
  • Feedback
  • ASPET

More Information

  • About JPET
  • Editorial Board
  • Instructions to Authors
  • Submit a Manuscript
  • Customized Alerts
  • RSS Feeds
  • Subscriptions
  • Permissions
  • Terms & Conditions of Use

ASPET's Other Journals

  • Drug Metabolism and Disposition
  • Molecular Pharmacology
  • Pharmacological Reviews
  • Pharmacology Research & Perspectives
ISSN 1521-0103 (Online)

Copyright © 2023 by the American Society for Pharmacology and Experimental Therapeutics