Expression of tumour suppressor genes after reprogramming in oocyte, egg and embryonic stem cell extracts Expression of RARB, CST6, CCND2, GAS2 and CDKN2A after 6 hours reprogramming analysed by Q-PCR. Data are shown as fold increase compared to the calibrator sample (UN: untreated cells). Relative quantification to the expression of ACTIN (ACTB) was performed for each gene. Study of CDKN2A expression of was only performed in HCC1954 since this gene is deleted in MCF-7 cells.* indicates P < 0.05 for treated groups different from UN.