Analyzing Topoisomerase II Cleavage Complexes Using Flow Cytometry
Maria Camila Gosso1, Néstor R Aznar1, Marcela B González-Cid1
1Laboratorio de Mutagénesis, Instituto de Medicina Experimental (IMEX), CONICET-ANM, Ciudad Autónoma de Buenos Aires, Argentina.
Methods in Molecular Biology (Clifton, N.J.)
|May 15, 2025
Summary
We developed a novel flow cytometry method to rapidly analyze drug-induced topoisomerase II cleavage complexes (Top2cc) in human cells. This technique aids in high-throughput drug screening and studying DNA-related pathways.
Area of Science:
- Cell Biology
- Molecular Biology
- Pharmacology
Background:
- Flow cytometry is a key technique for analyzing cell populations.
- Topoisomerase II (Top2) is a crucial enzyme involved in DNA replication and repair.
- Drug-induced Top2 cleavage complexes (Top2cc) are important targets for cancer therapy.
Purpose of the Study:
- To develop a flow cytometry-based method for analyzing drug-induced Top2cc.
- To enable rapid, high-throughput analysis of Top2-targeting drugs.
- To study the impact of Top2cc on cellular processes.
Main Methods:
- Utilized flow cytometry for cellular analysis.
- Developed a specific assay for detecting Top2cc.
- Applied the method to various human cell types, including clinical samples.
Main Results:
- The method allows rapid quantification of Top2cc in a cell cycle-dependent manner.
- It can differentiate between Top2 isoforms and track drug removal.
- The technique is applicable to diverse human cell types.
Conclusions:
- This flow cytometry method provides a valuable tool for high-throughput screening of Top2-targeting drugs.
- It facilitates the study of drug effects on DNA-related nuclear processes.
- The methodology supports research in cancer therapy and drug development.
