SNAI1 and invasive ductal breast carcinoma: Inverse correlation with E-cadherin [130]; significantly reduced E-cadherin expression [129]; 78% of tested tissues (n = 36, ductal adenocarcinoma) showed Snail expression; Snail higher in undifferentiated cell lines (MiaPaCa-2 and Panc-1) than differentiated (Capan-1, HPAF-2, AsPC-1) [137]