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lüll PtdIns(3,4)P2 instigates focal adhesions to generate podosomes Oikawa T; Takenawa TCell Adh Migr 2009[Apr]; 3 (2): 195-7Cell-to-extracellular matrix (ECM) adhesion plays important roles in various biological events, such as proliferation, differentiation and migration. Distinct from other types of adhesion structures (focal complexes, focal adhesions and so on), podosomes and invadopodia are thought to have additional functions beyond attachment, possibly including invasion into the ECM. for podosomes and invadopodia to invade into the ECM, molecules involved in adhesion, actin polymerization and ECM degradation must be recruited to sites of action. Our recent study demonstrated that podosomes form near newly formed focal adhesions via the minimally expressed phosphoinositide PtdIns(3,4) P2-mediated recruitment of the Tks5-Grb2 scaffold, followed by the accumulation of N-WASP. Although this study demonstrated details of molecular interplay during the transformation of focal adhesion, its regulation in the in vivo invasion process remains to be clarified. Here, we discuss the molecular bases of the transformation of focal adhesions to podosomes/invadopodia based on current understanding.|Animals[MESH]|Cells, Cultured[MESH]|Focal Adhesions/*physiology[MESH]|Humans[MESH]|Phosphatidylinositol Phosphates/*physiology[MESH] |