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. 2022 Oct 18;22:1073. doi: 10.1186/s12885-022-10119-z

Fig. 8.

Fig. 8

A schematic diagram of working mechanism of SMI#9/PTX combination therapy in TNBC chemosensitization. PTX or SMI#9 treatments induce mitotic arrest which can result in cell death or mitotic slippage. Formation of tetraploid G1 cells, a feature of mitotic slippage, is facilitated by premature cyclin B1 destruction and abnormal mitotic exit without chromosome segregation or cytokinesis. SMI#9 treatment enhances PTX cytotoxicity by inducing monopolar mitotic spindles and strengthening arrest and mitotic catastrophe of cells that slipped out of prolonged mitotic arrest