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- W2078282431 abstract "Hemocytes, which contain large cytoplasmic granules, invade the multilamellate glial sheath of ventral ganglion nerve roots of the crayfish following surgical interruption of these nerves. Electron microscopic examination of sections of plasticembedded tissues and replicas of freeze-cleaved ganglion roots reveals numerous slender cytoplasmic extensions of the hemocytes present in damaged nerve sheaths. Many of these microvillous extensions contact glial cells and filamentous extracellular masses. At sites of contact, the microvilli are flattened and occasionally electron-dense material is present in the hemocyte cytoplasm subjacent to the plasma membrane that is closely apposed to a glial cell or connective tissue. Intramembranous surfaces of hemocyte plasmalemmae exposed by freeze-fracture, exhibit particle aggregates 700–2500 Å in diameter. Individual particles are 95–105 Å in diameter. Since the particle aggregates correspond in overall dimension and position in the cell to the sites of contact of hemocyte processes with other sheath components, it is assumed that the two structures are equivalent and represent a junctional complex very similar in structure to some hemidesmosomes. Results from this study strongly suggest that granulated crustacean hemocytes, in response to surgical injury of nerves, invade the damaged nerve sheath and identify damaged glial cells and connective tissue by forming slender cytoplasmic processes which contact elements of the sheath. Tissue components contacted by the hemocytes may subsequently be phagocytosed by them. This is the first report of an invertebrate hemocyte-mediated response to tissue damage in which evidence is presented that the hemocyte may identify necrotic cells and extracellular matrix by forming junctional complexes with them. Crustacean hemocytes, therefore, are likely much more complex functionally than has been previously estimated." @default.
- W2078282431 created "2016-06-24" @default.
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- W2078282431 date "1977-01-01" @default.
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- W2078282431 title "Formation of junctional complexes at sites of contact of hemocytes with tissue elements in degenerating nerves of the crayfish, Orconectes virilis" @default.
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- W2078282431 doi "https://doi.org/10.1016/0040-8166(77)90048-9" @default.
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