Table I.

Optical density values (mean ± standard deviation) of Cell Counting kit-8 assay.

Cell groups	24 h	48 h	72 h
Control siRNA	0.507±0.048	0.714±0.083	0.978±0.078
RBP2-siRNA	0.325±0.067	0.605±0.118	0.906±0.070
t/p	7.650/0.000	2.606/0.016	2.377/0.027

Thyroid carcinoma K1 cells were transfected with RBP2-siRNA or control siRNA, and subjected to Cell Counting Kit-8 assay at 24, 48 and 72 h post-transfection, in order to assess their proliferation ability. RBP2, retinoblastoma binding protein 2; siRNA, small interfering RNA; RBP2-siRNA, siRNA targeting RBP2; t/p, ratio of t- vs. P-value.