Related Experiment Video
Updated: May 2, 2026

Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
Published on: April 3, 2014
Acyclic nucleoside phosphonates: a study on cytochrome P450 gene expression
Jana Nekvindova1, Juan Antonio Contreras, Peter Juvan
1Faculty of Medicine and Dentistry, Institute for Molecular and Translational Medicine, Palacky University , Olomouc , Czech Republic .
Adefovir dipivoxil (AD) and tenofovir disoproxil (TD) are antiviral drugs. Studies show these nucleotide analogues do not significantly induce cytochrome P450 enzymes, suggesting a low risk of drug-drug interactions.
Area of Science:
- Pharmacology and Toxicology
- Drug Metabolism and Interactions
- Molecular Biology
Background:
- Nucleotide analogues are crucial in treating viral infections and cancer.
- These drugs can impact cellular pathways and the drug-metabolizing system.
- Adefovir dipivoxil (AD) and tenofovir disoproxil (TD) are approved for Hepatitis B and HIV/AIDS.
Purpose of the Study:
- To assess the potential for drug-drug interactions of AD and TD.
- To investigate the effect of AD and TD on cytochrome P450 (CYP) enzyme expression.
Main Methods:
- Mice were administered AD or TD intraperitoneally (25 mg/kg).
- Gene expression was analyzed using cDNA microarrays and real-time RT-PCR.
- Protein levels were assessed via immunoblotting; phenobarbital and β-naphthoflavone served as positive controls.
Main Results:
- A significant induction of CYP genes was observed in the positive control group.
- Neither AD nor TD demonstrated clinically significant induction of CYP genes.
- No substantial impact on drug metabolism pathways mediated by CYP enzymes was found.
Conclusions:
- AD and TD exhibit a favorable safety profile regarding CYP-mediated drug-drug interactions.
- These findings are vital for the safe co-administration of AD and TD with other medications.
- The study supports the use of AD and TD in combination therapies for viral infections.
More Related Videos
10:44Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures
Published on: March 28, 2017
08:46Regioselective O-Glycosylation of Nucleosides via the Temporary 2',3'-Diol Protection by a Boronic Ester for the Synthesis of Disaccharide Nucleosides
Published on: July 26, 2018
Related Concept Videos
Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes
Pharmacogenetics of Phase II Enzymes: N-acetyltransferase, Thiopurine S-methyltransferase, UDP-glucuronosyltransferase
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase
Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters
Pharmacogenetics of Drug Metabolism: Overview
Pharmacogenomics: Identification of New Drug Targets