We performed principle component analysis (PCA) (FactoMiner) on mRNA expression, as defined by qPCR values of 2-ΔCt normalized to GAPDH, in a series of different epithelial (EPCAM, ESPR1, E-cadherin) and mesenchymal (ZEB1, Vimentin, N-cadherin) markers in a panel of 15 primary (ptAB, ptAB-sph, ptAF, ptAF-sph, ptW, ptW-sph, ptAO-sph, ptG, ptD, ptH, PKD1, PKD2, ptAL-sph, ptAP-sph, ptAM-sph) and 2 established ovarian cancer cell lines (OVCAR5, OVCAR8). This evidence concerns the gene GAPDH and ovarian cancer.