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lüll Winding through the WNT pathway during cellular development and demise Li F; Chong ZZ; Maiese KHistol Histopathol 2006[Jan]; 21 (1): 103-24In slightly over a period of twenty years, our comprehension of the cellular and molecular mechanisms that govern the Wnt signaling pathway continue to unfold. The Wnt proteins were initially implicated in viral carcinogenesis experiments associated with mammary tumors, but since this period investigations focusing on the Wnt pathways and their transmembrane receptors termed Frizzled have been advanced to demonstrate the critical nature of Wnt for the development of a variety of cell populations as well as the potential of the Wnt pathway to avert apoptotic injury. In particular, Wnt signaling plays a significant role in both the cardiovascular and nervous systems during embryonic cell patterning, proliferation, differentiation, and orientation. Furthermore, modulation of Wnt signaling under specific cellular influences can either promote or prevent the early and late stages of apoptotic cellular injury in neurons, endothelial cells, vascular smooth muscle cells, and cardiomyocytes. A number of downstream signal transduction pathways can mediate the biological response of the Wnt proteins that include Dishevelled, beta-catenin, intracellular calcium, protein kinase C, Akt, and glycogen synthase kinase-3beta. Interestingly, these cellular cascades of the Wnt-Frizzled pathways can participate in several neurodegenerative, vascular, and cardiac disorders and may be closely integrated with the function of trophic factors. Identification of the critical elements that modulate the Wnt-Frizzled signaling pathway should continue to unlock the potential of Wnt pathway for the development of new therapeutic options against neurodegenerative and vascular diseases.|*Apoptosis[MESH]|*Cell Differentiation[MESH]|Animals[MESH]|Cardiovascular Diseases/physiopathology[MESH]|Cardiovascular Physiological Phenomena[MESH]|Cardiovascular System/*cytology[MESH]|Frizzled Receptors/physiology[MESH]|Humans[MESH]|Nervous System Physiological Phenomena[MESH]|Nervous System/cytology/embryology[MESH]|Neurodegenerative Diseases/physiopathology[MESH]|Neurons/*physiology[MESH]|Signal Transduction/*physiology[MESH]|Wnt Proteins/chemistry/*physiology[MESH] |