Cytometric Analysis of DNA Replication Inhibited by Emetine and Cyclosporin A

Overview

Journal Histochemistry

Specialty Biochemistry

Date 1991 Jan 1

PMID 1938485

Citations 4

Authors

T Schweighoffer

E SCHWEIGHOFFER

A Apati

F Antoni

G Molnar

K Lapis

G Banfalvi

Affiliations

Soon will be listed here.

Abstract

DNA staining methods based on aspecific interactions with dye molecules have been replaced by an immunofluorescent approach to measure DNA replication. Biotin-11-dUTP was incorporated into permeable thymocytes isolated after emetine or cyclosporin A treatment of mice. Active sites of DNA replication were amplified based on biotin-avidin interaction and verified under fluorescent microscope. Cytometry of fluorescent images allow the direct measurement of replicating DNA without aspecific detection of total cellular DNA. Cytometric analysis of replication revealed that emetine acts at the early S phase, while cyclosporin A blocks in vivo DNA synthesis at mid S phase.

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