Use of CRISPR/Cas9 with Homology-Directed Repair to Gene-Edit Topoisomerase IIβ in Human Leukemia K562 Cells: Generation of a Resistance Phenotype.

Abstract excerpt

DNA topoisomerase IIβ (TOP2β/180; 180 kDa) is a nuclear enzyme that regulates DNA topology by generation of short-lived DNA double-strand breaks, primarily during transcription. TOP2β/180 can be a target for DNA damage-stabilizing anticancer drugs, whose efficacy is often limited by chemoresistance. Our laboratory previously demonstrated reduced levels of TOP2β/180 (and the paralog TOP2α/170) in an acquired...

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