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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The expression of plexins during mouse embryogenesis.

Plexins are large transmembrane proteins that are receptors for semaphorins, either alone or in a complex with neuropilin-1 or -2. Nine different mouse plexins have been found: Plexin-A1-4, -B1-3, -C1 and -D1. The expression and function of plexins in non-neuronal tissues has been poorly characterized, although Plexin-A1 has been shown to have a role during lung and cardiac morphogenesis. We have done an extensive non-radioactive in situ hybridisation survey of Plxna1-a4, Plxnb1 -b3 and Plxnc1 in E14 mouse embryo. At E14, Plxnb3 expression could not be detected by in situ hybridisation. All other plexins studied are widely expressed both in neuronal and non-neuronal tissues. We have also followed the expression patterns of plexins during the development of the kidney, tooth and testis. Plxnb1 and Plxnb2 are expressed in the immature glomeruli and mesenchyme of the developing kidney. In the tooth bud, Plxna1 and Plxnb1 are expressed in the oral epithelium, enamel knot and in both the inner and outer enamel epithelium, whereas the expression of Plxnb2 is more restricted to the inner enamel epithelium. In the testis, Plxna1, Plxnb1 and Plxnc1 are expressed in the developing sex chords. This study shows that during development, plexins are expressed in specific and distinct patterns also in non-neuronal tissues.[1]


  1. The expression of plexins during mouse embryogenesis. Perälä, N.M., Immonen, T., Sariola, H. Gene Expr. Patterns (2005) [Pubmed]
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