Abstract
Cell locomotion is an important activity in many cellular phenomena such as wound healing, morphogenesis and development (Stossel, 1993). The cell locomotion can be divided into three distinct, but consecutive steps: protrusion of the cell front, adhesion of that portion to substrate and contraction of the tail portion of the cell. The membrane protrusion is indispensable in the locomotion, and the mechanism that drives this movement has been a subject of a number of studies (for reviews, see Condeelis, 1993; Mitchson and Cramer, 1996; Lauffenburger and Horwitz, 1996; Borisy and Svitkina, 2000). Since lamellipodium is bordered by an elastic cell membrane and is highly anisotropic in shape, it should be supported by some intracellular architecture to maintain its morphology. Electron microscopic studies have established that in lamellipodium crisscrossing meshwork of actin filaments resides immediately beneath the cell membrane with their plus end (the end where polymerization occurs in vivo) oriented toward the membrane (Small et al., 1978; Small, 1988). Hence, actin filament plays a major role in supporting lamellipodial shape.
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Miyata, H. (2003). A Study of Lamellipodial Membrane Dynamics by Optical Trapping Technique: Implication of Motor Activity in Movements. In: Sugi, H. (eds) Molecular and Cellular Aspects of Muscle Contraction. Advances in Experimental Medicine and Biology, vol 538. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-9029-7_31
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DOI: https://doi.org/10.1007/978-1-4419-9029-7_31
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