TGFB1 and neoplasm: The tumor antigen and other molecules carried by TEXs include co-stimulatory molecules, MHC class II and class I molecules, tumor-associated antigens, nucleic acids, apoptotic bodies [51], intraluminal growth-promoting cytokines like epidermal growth factors (EGFR) and transforming growth factor-beta (TGF-β), heat shock proteins (HSP) 70–80 [52] and tetraspanins.