Focal adhesion kinase (FAK) is a nonreceptor protein tyrosine kinase and scaffolding protein that mediates numerous cellular functions, including adhesion, migration and invasion [ 9].
In addition, growth factors, cytokines and chemokines mediate numerous important cellular functions.
Accumulated evidences have demonstrated that RANKL stimulation on bone marrow-derived macrophages (BMMs) transmit diverse signal pathways which mediate numerous and various cellular responses, such as cellular motility, membrane fusion, differentiation-related gene expression, and apoptosis [ 5, 8, 18, 19].
RING-type E3s function together with ubiquitin-conjugating enzymes (E2s) to mediate ubiquitination and are implicated in numerous cellular processes.
UCHL1 is previously suggested to mediate cytoarchitectural plasticity by interacting with numerous cellular adhesion complexes, including paxillin, vinculin, and β-catenin (Frisan et al. 2012).
However, since PI3K and Akt mediate many signalling pathways important for numerous cellular functions in normal tissues, it remains to be determined whether these agents have sufficiently wide therapeutic index to be used in the treatment of cancer.
The PhoP-PhoQ system governs virulence, mediates adaptation to a Mg2+-limiting environment and regulates numerous cellular activities in Gram-negative bacteria (Soncini et al., 1996; Gibbons et al., 2005).
Cellular interactions with extracellular matrices (ECM) through the application of mechanical forces mediate numerous biological processes including developmental morphogenesis, wound healing and cancer metastasis.
Integrins mediate numerous intracellular signaling pathways, such as calcium channels, kinases, and phosphatases, and also recruit intracellular signaling reagents, influencing cellular functions such as motility and tissue invasion.
