Figure 2

Relative mRNA expression levels of TGF-β isoforms and receptors in breast cancer cell lines. Total RNA from a panel of five human breast cancer cell lines displaying different invasion and metastatic potentiasl were used to analyze the mRNA expression levels of TGF-β isoforms (TGF-β1, TGF-β2 and TGF-β3) and TGF-β receptors (TβRI and TβRII) by qRT-PCR. Results are presented as means ± standard errors from three independent experiments, each measured in triplicate. *, p < 0.05, **, p < 0.01 and *** p < 0.001, all versus control (MCF-7).