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- W2145320436 abstract "Many studies have shown that tetraspanins play important role in cell–cell and cell–extracellular matrix (ECM) interactions. The repertoire and functions of tetraspanins in Schwann cells, glial cells of the peripheral nervous system have remained largely uncharacterized. This study was undertaken to identify Schwann cell tetraspanins and to elucidate their possible functions. Microarray analysis revealed the expression of numerous tetraspanins in primary culture of Schwann cells. Expression of five of them, CD9, CD63, CD81, CD82, and CD151, and of tetraspanin-associated protein EWI-2 was also confirmed by immunofluorescence. Localization of CD9, CD63, CD81, and EWI-2 was largely confined to paranodes and Schmidt-Lanterman incisures, regions of noncompact myelin. Immunoprecipitation experiments showed that these four proteins form a complex in Schwann cells. siRNA silencing of individual components of the complex did not affect Schwann cell adhesion to ECM proteins or attachment to and alignment with axons. However, suppression of both CD63 and CD81 expression together significantly inhibited extension of Schwann cell processes along axons, without affecting initial attachment of the cells to the axonal surface. Adhesion, spreading, and migration of Schwann cells on ECM proteins also were not affected by double silencing of CD63 and CD81. Suppression of CD63 and CD81 expression did not affect the ability of Schwann cells to myelinate dorsal root ganglion neurons in vitro. These findings strongly suggest that CD63 and CD81 play an important role in Schwann cell spreading along axons but seem to be dispensable for Schwann cell myelination. © 2013 Wiley Periodicals, Inc." @default.
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- W2145320436 date "2013-08-30" @default.
- W2145320436 modified "2023-09-27" @default.
- W2145320436 title "Tetraspanins are involved in Schwann cell-axon interaction" @default.
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- W2145320436 doi "https://doi.org/10.1002/jnr.23272" @default.
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