PIR expression is associated to an increased migration in SiHa cells from Upregulation of PIR gene expression induced by human papillomavirus E6 and E7 in epithelial oral and cervical cells

(a) Transwell assay for SiHa cell migration after transfection with a siRNA for PIR silencing, (b) Cell count after 7 h of migration. These results are representative of three independent experiments. *: p<0.05; **: p<0.01; ***: p<0.001.