ZEB1 and neoplasm: The immunohistochemical detection results showed that the protein expression level of zeb1 in tumor cells of xenografts of shHOTAIR SKOV3 cells inoculated with tumor bearing mice was significantly lower (IHC staining showed a comprehensive score of 2 ± 1) than the protein expression level of zeb1 in the control group (IHC score of 4 ± 1).