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. 2018 May 4;41(5):436–443. doi: 10.14348/molcells.2018.2266

Fig. 2. Actin dysfunction sustains RSK activation and Cdc2 inactivation in IMR-90 cells.

Fig. 2

As denoted in Fig. 1A, IMR-90 cells were synchronized with 2 mM double thymidine arrest, incubated with 5 μM cytochalasin D or the solvent DMSO as a control at 5.5–6 h after the second release, and collected at each indicated time point after the second release. Cell lysates were resolved by 8% SDS-PAGE and blotted. Blots were probed with (A) p-ERK1/2 and p-RSK1 (Ser 380) and re-probed with anti-ERK1/2 and anti-RSK1 to observe the total amount of each protein, (B) p-ERK1/2 and p-Cdc25C (Ser 216), and re-probed with anti-ERK1/2 and anti-Cdc25C. (A, B) Cell cycle progression at G2/M was monitored by detecting p-Cdc2 (Tyr 15) followed by re-probing with anti-Cdc2 to detect the total amount of Cdc2. (C) The same samples from (A) and (B) were blotted with p-Wee1 (Ser 642) and re-probed with anti-Wee1. Each blot was re-probed with anti-actin as a loading control.