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Cell entry and export of nucleoside analogues
Marçal Pastor-Anglada1, Pedro Cano-Soldado, Míriam Molina-Arcas
1Departament de Bioquímica i Biologia Molecular, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain. mpastor@ub.edu
Virus Research
|January 15, 2005
Summary
Antiretroviral nucleoside analogues can cause mutagenesis. This review details how nucleoside transporters (CNT, ENT, OAT, OCT, PEPT, MRP) influence drug uptake and efflux, impacting cellular concentrations and potential side effects.
Area of Science:
- Pharmacology
- Molecular Biology
- Biochemistry
Background:
- Nucleoside analogues used as antiretroviral agents may induce mutagenesis.
- Cellular nucleoside concentrations are influenced by cell-specific enzymes and transporters.
- Understanding these transport mechanisms is crucial for optimizing antiviral therapy.
Purpose of the Study:
- To review transporter-mediated pathways involved in nucleoside and nucleobase derivative uptake and efflux.
- To elucidate the role of various transporter families in the pharmacokinetics of antiviral nucleoside drugs.
- To discuss the biochemical properties of these transporters and their impact on drug disposition.
Main Methods:
- Literature review focusing on nucleoside and nucleobase transporter systems.
- Analysis of biochemical properties of transporter families: Concentrative Nucleoside Transporter (CNT), Equilibrative Nucleoside Transporter (ENT), Organic Anion Transporter (OAT), Organic Cation Transporter (OCT), Peptide Transporter (PEPT), and Multidrug Resistance Protein (MRP).
- Categorization of nucleoside transport processes into four types: equilibrative uniport, substrate exchange, concentrative uptake, and active efflux.
Main Results:
- Four main types of nucleoside transport processes have been identified: equilibrative uniport, substrate exchange, concentrative uptake (Na+ or H+-dependent), and active efflux (ATP-dependent).
- Key transporter families involved include CNT, ENT, OAT, OCT, PEPT, and MRP.
- These transporters regulate the passage of nucleoside-derived antiviral drugs across the plasma membrane.
Conclusions:
- Transporter-mediated pathways significantly influence the intracellular concentration and efficacy of nucleoside analogue antiretrovirals.
- Understanding the function of CNT, ENT, OAT, OCT, PEPT, and MRP is essential for predicting and managing potential mutagenesis and optimizing drug therapy.
- Further research into these transporters can lead to improved antiretroviral drug development and personalized treatment strategies.