Proliferation assay of irradiated cells. HDMEC were treated as described in 'Methods'. Panels A-C show the proliferation data of cells pre-treated with precursor or inhibitor molecules of miR-189, let-7g and miR-20a. The bar charts present the mean proliferation of HDMEC after irradiation, dependent on the pre-treatment. Fluorescence values are set in percentage related to non-irradiated cells (100%). Bars: Mean (n = 24) with SD. *: P < 0.05 versus the pre-miR or anti-miR negative control.