TRP channel regulates EGFR signaling in hair morphogenesis and skin barrier formation.

Journal Article

A plethora of growth factors regulate keratinocyte proliferation and differentiation that control hair morphogenesis and skin barrier formation. Wavy hair phenotypes in mice result from naturally occurring loss-of-function mutations in the genes for TGF-alpha and EGFR. Conversely, excessive activities of TGF-alpha/EGFR result in hairless phenotypes and skin cancers. Unexpectedly, we found that mice lacking the Trpv3 gene also exhibit wavy hair coat and curly whiskers. Here we show that keratinocyte TRPV3, a member of the transient receptor potential (TRP) family of Ca(2+)-permeant channels, forms a signaling complex with TGF-alpha/EGFR. Activation of EGFR leads to increased TRPV3 channel activity, which in turn stimulates TGF-alpha release. TRPV3 is also required for the formation of the skin barrier by regulating the activities of transglutaminases, a family of Ca(2+)-dependent crosslinking enzymes essential for keratinocyte cornification. Our results show that a TRP channel plays a role in regulating growth factor signaling by direct complex formation.

Full Text

Duke Authors

Cited Authors

  • Cheng, X; Jin, J; Hu, L; Shen, D; Dong, X-P; Samie, MA; Knoff, J; Eisinger, B; Liu, M-L; Huang, SM; Caterina, MJ; Dempsey, P; Michael, LE; Dlugosz, AA; Andrews, NC; Clapham, DE; Xu, H

Published Date

  • April 16, 2010

Published In

Volume / Issue

  • 141 / 2

Start / End Page

  • 331 - 343

PubMed ID

  • 20403327

Pubmed Central ID

  • 20403327

Electronic International Standard Serial Number (EISSN)

  • 1097-4172

Digital Object Identifier (DOI)

  • 10.1016/j.cell.2010.03.013


  • eng

Conference Location

  • United States