TGFB1 and neoplasm: In order to investigate the effect of TGF-β suppression on tumor cell invasion, we introduce a new variable A(x, t) for the TGF-β anti-body and derive the following equations including the modified equation of TGF-β from Eq (11)∂G∂t=DGΔG+λGn-μGG-μAGAG,(20)∂A∂t=DAΔA+λA-μAA,(21)where μAG is the consumption rate of TGF-β due to antibody reaction, DA is the diffusion coefficient of the antibody, λA is the injection rate of the antibody, and, finally, μA is the natural decay rate of the antibody.