Cell viability was performed using trypan blue-based assay (n=3 technical triplicate), data represented as mean ± (SEM), * represents the statistical analysis were performed relative to Scr-γtcPNA-155 and ◆ represent analysis performed relative to PNA-155. *p<0.05, **p<0.01, ***p<0.001 and ****p<0.0001, ◆ p<0.05, ◆◆ p<0.01, unpaired two-tailed t-test was used for statistical analysis. The experiment was repeated three times and in triplicate.