Fig 1: RT-PCR expression analysis of selected genes differentially expressed in molecular subtypes of TNBCA. Expression of the basal-like genes KRT5, KRT14, KRT17 and EGFR genes. B. Expression of the LAR genes AR, FOXA1 and ERBB4. C. Expression of the HER2 gene and IHC analysis of HER2 expression in the HBCx-51 PDX (classified as HER2 2+). D. Expression of CDH1 and CLDN4 genes, known to be low or null in the mesenchymal subtypes. As positive controls, an ER+ and HER2+ PDX are shown in the LAR genes and HER2 graphs, respectively.