Categorization of topoisomerase targeting anticancer drugs

Drug mechanisms and classificationClass-I (topoisomerase poisons)Class-II (topoisomerase inhibitors)
Mechanism of drug actionThese drugs act as intermediaries in the catalytic cycle of the enzyme, blocking the creation of a covalent topoisomerase-DNA network.These medications interfere with the enzyme’s catalytic action without trapping the covalent compound.
Nomenclature and classification of drug typesClass-I medications are sometimes referred to as “topoisomerase poisons” since they convert the enzyme into a strong cellular toxin.Class-II drugs are assigned as “topoisomerase inhibitors.”
Varieties of topoisomerase medicationsClass-I medications contain acridines, alkaloids, anthracyclines, ellipticines, epipodophyllotoxins, actinomycin, quinolones, and isoflavonoids.Class-II medications are fostriecin analogues and coumarin antibiotics.