TGM2 and cancer: Aberrant expression of TG2 is associated with the loss of the epithelial features such as type-I E-cadherin expression and cellular polarity, along with upregulation of the mesenchymal markers including N-cadherin, vimentin, fibronectin, and the transcriptional factors Snail1, Zeb1, Zeb2, and Twist1 in breast [59] and several other cancers [55,60,61,62,63,64].