Preface -- Contributors.- Beyond the channel: Role of connexins in regulating normal and cancerous processes in the mammary gland.-     Connexins: Bridging the gap between the tumor microenvironment and cancer cell communication in brain tumors -- MicroRNA and Gap Junctions in Glioblastoma cells: Implications for cellular therapy.- Dynamic regulation of adherens junctions: implication in cell differentiation and tumor development -- Cadherin-based cell-cell adhesions: adhesion structure, signalling and computational modeling.- E-cadherin/catenin complex modulations in human oral cancer.-      Tumor-derived exosomes in metastasis signaling and implications.-      Tunneling Nanotubes: Intercellular conduits for direct cell-to-cell communication in cancer.- Cell-Cell Fusion, Chemotaxis and Metastasis.- Role of the family of Ephs and Ephrins in non-junctional cell-cell communication in cancer.- Computational approaches to modeling of molecular interactions in multicellular systems.- Contact Normalization or Escape from the Matrix.- Intercellular communication, the tumor microenvironment, and tumor progression.- Index.