F11R and cancer: This suggestion was supported by the fact, that the reduction of F11R/JAM-A protein level by Tetrocarcin-A inhibited the growth of all mammary gland epithelial cell lines expressing the high amounts of F11R/JAM-A: not only the cancer cells, but also the non-cancerous MCF-10A line [52] that also expresses high levels of F11R-JAM-A [16].