Figure 9. Cardioprotective Effect of PG Is Dependent on Bcl-xL.
Primary cultured cardiomyocytes were transfected with Bcl-xL siRNA or negative control siRNA as described in the Methods. At 48 hrs after siRNA transfection, cells were collected to verify Bcl-xL down regulation (upper panel) by Western blot with vinculin (bottom panel) as a loading control (A) or were pretreated with 10 μM PG for 24 hrs prior to 16 hrs treatment with 1 μM Dox for measurement of caspase-3 activity (B). The data is from one experiment representative of three. A superscript letter indicates significant difference (P<0.05) from means labeled with a different letter as determined by ANOVA analysis.