In tumours, HIF‐1α promoted the expression of transforming growth factor (TGF)‐β, LOX, Snail, TWIST‐1, TCF‐3, ZEB1 (Zinc finger E‐box‐binding homeobox 1) and ZEB2, which then activated EMT and the metastasis of tumour cells 31, 32, 33, 34. The gene discussed is TGFB1; the disease is neoplasm.