RB1 and retinoblastoma: In order to clarify the relationships among circRNF20, miR-132-3p and PAX6 in RB cell progression, Y79 and WERI-Rb-1 cells were introduced with sh-NC, sh-circRNF20#1, sh-circRNF20#1 + anti-NC, sh-circRNF20#1 + anti-miR-132-3p, sh-circRNF20#1 + vector or sh-circRNF20#1 + PAX6.