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| Paracytophagy ： ウィキペディア英語版 |
Paracytophagy
Paracytophagy () is the cellular process whereby a cell engulfs a protrusion which extends from a neighboring cell. This protrusion may contain material which is actively transferred between the cells. The process of paracytophagy was first described as a crucial step during cell-to-cell spread of the intracellular bacterial pathogen ''Listeria monocytogenes'', and is also commonly observed in ''Shigella flexneri''. Paracytophagy allows these intracellular pathogens to spread directly from cell to cell, thus escaping immune detection and destruction. Studies of this process have contributed significantly to our understanding of the role of the actin cytoskeleton in eukaryotic cells.
==Actin cytoskeleton==
Actin is one of the main cytoskeletal proteins in eukaryotic cells. The polymerization of actin filaments is responsible for the formation of pseudopods, filopodia and lamellipodia during cell motility. Cells actively build actin microfilaments that push the cell membrane towards the direction of advance.〔Molecular Biology of the Cell. 4th edition. Alberts B, Johnson A, Lewis J, et al. New York: Garland Science; 2002.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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