A Selective Nano Cell Cycle Checkpoint Inhibitor Overcomes Leukemia Chemoresistance (Small 25/2023)

Nano Cell Cycle Checkpoint Inhibitors In article number 2300736, Daishun Ling, Fangyuan Li, and co‐workers demonstrate that ultra‐small iron oxide nanoparticles (IONPs) can serve as a selective nano cell cycle checkpoint inhibitor (NCCI) to catalyze the intracellular H2O2 into abundant ·OH, cleave heat shock protein 90 (Hsp90), and thus induce the degradation of the client protein ATR/CHK1, leading to the dysfunction of the G2/M checkpoint in acute myeloid leukemia (AML) cells. As a result, NCCI can interfere with the chemotherapy‐induced DNA damage repair, which effectively reverses the chemoresistance of acute myeloid leukemia.