Figure 2. MicroRNAs upregulated in senescent cells. RNA extracted from Y (pdl 22-25) and S (pdl 50-55) WI-38 cells was used to measure the levels of the microRNAs listed, using RT-qPCR (Materials and Methods). MicroRNA abundance was normalized to U1 snRNA levels. Data are the means and S.D. from three independent experiments.