Figure 2
From: Splicing controls the ubiquitin response during DNA double-strand break repair
Inhibition of splicing downregulates repair factors at both the mRNA and protein levels. (a) U2OS cells were treated with pladienolide B for 2, 6 and 16 h and irradiated (6 Gy, 1 h recovery) 1 h prior to termination of the treatment. The levels of the indicated mRNAs were measured through qPCR analysis. The change is relative to the DMSO control and two reference genes (18S rRNA and β-actin). Means±S.D. are shown, n=3. (b) qPCR analysis of the levels mRNA and pre-mRNA for RNF8 and RAD51 in U2OS cells treated with pladienolide B or isoginkgetin for 2, 6 or 16 h and irradiated (6 Gy, 1 h recovery) 1 h prior to termination of this treatment. The change is expressed relative to the DMSO control value and the levels of mRNA for two reference genes (18S rRNA and β-actin). Means±S.D. are shown, n=3. The arrows indicate the positioning of the PCR primers used and their sequences are shown in Supplementary Table S1. (c) Western blotting following pladienolide B treatment of U2OS cells as described in (a). β-Actin was used as a loading control. Densitometric quantification of each protein is shown in Supplementary Figure S2B. The three MDC1 bands correspond to the unphosphorylated, phosphorylated and hyperphosphorylated forms of full-length MDC1
