Tenascin-C and tenascin-W in whisker follicle stem cell niches: Possible roles in regulating stem cell proliferation and migration

Richard P Tucker, Jacqueline Ferralli, Johannes C. Schittny, Ruth Chiquet-Ehrismann

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The whisker follicle has CD34-positive stem cells that migrate from their niche near the bulge along the glassy membrane to the whisker bulb, where they participate in the formation of the whisker shaft. Using immunohistochemistry, we found the glycoprotein tenascin-C in the fibrous capsule of mouse whisker follicles, along the glassy membrane and in the trabecular region surrounding keratin-15- negative, CD34-positive stem cells. The related glycoprotein tenascin-W is found in the CD34-positive stem cell niche, in nearby trabeculae and along the glassy membrane. Tenascin-W is also found in the neural stem cell niche of nearby hair follicles. The formation of stress fibers and focal adhesion complexes in CD34-positive whisker-derived stem cells cultured on fibronectin was inhibited by both tenascin-C and tenascin-W, which is consistent with a role for these glycoproteins in promoting the migration of these cells from the niche to the whisker bulb. Tenascin-C, but not tenascin-W, increased the proliferation of whisker follicle stem cells in vitro. Thus, the CD34-positive whisker follicle stem cell niche contains both tenascin-C and tenascin-W, and these glycoproteins might play a role in directing the migration and proliferation of these stem cells.

Original languageEnglish (US)
Pages (from-to)5111-5115
Number of pages5
JournalJournal of Cell Science
Volume126
Issue number22
DOIs
StatePublished - Nov 15 2013

Keywords

  • CD34
  • Extracellular matrix
  • Fibronectin
  • Mouse
  • Vibrissa

ASJC Scopus subject areas

  • Cell Biology

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