High-throughput fluorescence flow-injection topoisomerase II inhibition assay.
A high-throughput fluorescence flow-injection assay is described, suitable for determining the catalytic inhibition of DNA topoisomerase II. The method, which separates high molecular mass trypanosome kinetoplast DNA from its decatenated product by centrifugation, should be useful for the rapid and accurate screening of potential anticancer topoisomerase II inhibitors and the determination of their inhibition constants. Advantages of the flow-injection method over agarose gel electrophoresis and radioactive centrifugation assays are that it is faster, more sensitive, highly linear in its response to product formation, and does not require the production of radioactive trypanosome kinetoplast DNA substrate.
Barnabé
N
N
Faculty of Pharmacy, University of Manitoba, Winnipeg, Canada.
Hasinoff
B B
BB
D000818:Animals; D002384:Catalysis; D004250:DNA Topoisomerases, Type II / Q000378:metabolism; D018105:DNA, Kinetoplast / Q000378:metabolism; D004587:Electrophoresis, Agar Gel; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005047:Etoposide / Q000494:pharmacology; D017022:Flow Injection Analysis / Q000379:methods*; D011929:Razoxane / Q000494:pharmacology; D013050:Spectrometry, Fluorescence / Q000379:methods*; D059005:Topoisomerase II Inhibitors; D014345:Trypanosoma / Q000235:genetics
D018105:DNA, Kinetoplast; D004791:Enzyme Inhibitors; D059005:Topoisomerase II Inhibitors; D011929:Razoxane; D005047:Etoposide; D004250:DNA Topoisomerases, Type II