Related Experiment Video
Updated: Jul 30, 2026

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images
Published on: September 7, 2017
Inhibition of DNA methyltransferase inhibits DNA replication
J D Knox1, F D Araujo, P Bigey
1Department of Pharmacology and Therapeutics, the McGill Cancer Centre, McGill University, 3655 Sir William Osler Promenade, Montreal, Quebec H3G 1Y6, Canada.
DNA methyltransferase (DMT) is essential for DNA replication in lung cancer cells. Inhibiting DMT disrupts DNA synthesis and cell cycle progression, impacting DNA replication origins.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- Ectopic DNA methyltransferase (DMT) expression induces cell transformation.
- DMT inhibition reverses this transformation via unknown mechanisms.
- DNA replication is crucial for cell division and cancer progression.
Purpose of the Study:
- To investigate if active DNA methyltransferase (DMT) is required for DNA replication in human non-small cell lung carcinoma A549 cells.
- To elucidate the role of DMT in DNA synthesis and cell cycle progression.
Main Methods:
- Inhibition of DNA methyltransferase (DMT) using two novel methods.
- Assessment of DNA synthesis and cell cycle progression.
- Competitive polymerase chain reaction (PCR) to analyze newly synthesized DNA and origin activity.
Main Results:
- DNA methyltransferase (DMT) inhibition negatively impacts DNA synthesis.
- Cell cycle progression is hindered following DMT inhibition.
- Decreased origin activity at replication origins was observed after DMT inhibition.
Conclusions:
- Active DNA methyltransferase (DMT) is required for DNA replication in A549 lung cancer cells.
- DMT inhibition affects DNA synthesis, cell cycle, and replication origin function.
- The necessity of DMT for replication may coordinate DNA replication with epigenetic inheritance.
More Related Videos
11:53An Alternative Culture Method to Maintain Genomic Hypomethylation of Mouse Embryonic Stem Cells Using MEK Inhibitor PD0325901 and Vitamin C
Published on: June 1, 2018
06:07Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
Related Concept Videos
Negative Regulator Molecules
DNA Damage can Stall the Cell Cycle
Restarting Stalled Replication Forks
Eukaryotic Transcription Inhibitors
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
DNA Damage Can Stall the Cell Cycle
Inhibitors of Bacterial DNA Synthesis