TGFBI and neoplasm: To determine whether ectopic expression of the Betaig-h3 gene suppresses tumour formation in vivo, 5×106 of each of the following cell types were subcutaneously injected into nude mice: control BEP2D cells, TL1 tumour cells, TL1-pRc/CMV2 and Betaig-h3-transfected cells (clone 18 and 28).