construct in these 4 NSCLC cell lines. We discovered a high c-MYC reporter activity in the cell lines with high hPAF1 protein level (A549 and H838), low activity of the c-MYC reporter in H1650 cells with low hPAF1 protein level, and almost no detectable c-MYC re- porter activity in the H2170 cells (Fig. 3B). Thus, the fact that the expression of one hPAF1C factor is close correlated with that of c- MYC at both RNA and protein levels strongly suggests that hPAF1C play an active role in c-MYC transcriptional activity.
To investigate the effects of hPAF1C inhibition, we utilized hPAF1etargeted siRNAs to knock-down the protein level of hPAF1. The transfection of siRNA was conducted according to standard protocol and the knock-down efficiency was evaluated through western blot analysis. Interestingly, we found that the treatment of hPAF1 siRNA also resulted in obvious reduction of c-MYC expres- sion (Fig. 3C). These results highlight a positive correlation between endogenous hPAF1 and c-MYC expressions in NSCLC samples, and the reduction of hPAF1 expression also down-regulate the expression of c-MYC in NSCLC cells.
construct in these 4 NSCLC cell lines. We discovered a high c-MYC reporter activity in the cell lines with high hPAF1 protein level (A549 and H838), low activity of the c-MYC reporter in H1650 cells with low hPAF1 protein level, and almost no detectable c-MYC re- porter activity in the H2170 cells (Fig. 3B). Thus, the fact that the expression of one hPAF1C factor is close correlated with that of c- MYC at both RNA and protein levels strongly suggests that hPAF1C play an active role in c-MYC transcriptional activity.To investigate the effects of hPAF1C inhibition, we utilized hPAF1etargeted siRNAs to knock-down the protein level of hPAF1. The transfection of siRNA was conducted according to standard protocol and the knock-down efficiency was evaluated through western blot analysis. Interestingly, we found that the treatment of hPAF1 siRNA also resulted in obvious reduction of c-MYC expres- sion (Fig. 3C). These results highlight a positive correlation between endogenous hPAF1 and c-MYC expressions in NSCLC samples, and the reduction of hPAF1 expression also down-regulate the expression of c-MYC in NSCLC cells.
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