Figure 9: Inhibition of tumour induction by anti-α-human chorionic gonadotropin (hCG) antibody. Human lung cancer Chago cells (expressing hCGα), 1×106 in 0.5 mL of PBS buffer along with different concentrations of anti-hCGα antibody, were transplanted under the dorsal skin of athymic mice (three animals in each group). The control group was given transplants of the same number of cells and an equivalent amount of normal serum (designated as 0 ng of anti-hCGα antibody [α-HCG-ab]. Series of panels under A, B, C, D, and E show tumour sizes photographed after 2, 4, 6, 8, and 10 weeks, respectively, after transplantation of cells with indicated concentrations of antibody [33].