TGFB1 and neoplasm: The results showed that all of the three TGF‐β isoforms significantly reduced HCV core protein level in a dose‐dependent manner with TGF‐β1 possessing the best anti‐HCV effect (Figure 1C), though a slightly detectable cytotoxicity was detected with an MTT assay without a significant dose‐dependent manner (Figure 1D), which might be induced by the inhibition of TGF‐β to tumour cells.23