Planar Polarization in Embryonic Epidermis Orchestrates Global Asymmetric Morphogenesis of Hair Follicles

Mammalian body hairs align along the anterior–posterior (A–P) axis and offer a striking but poorly understood example of global cell polarization, a phenomenon known as planar cell polarity (PCP). We have discovered that during embryogenesis, marked changes in cell shape and cytoskeletal polarization occur as nascent hair follicles become anteriorly angled, morphologically polarized and molecularly compartmentalized along the A–P axis. Hair follicle initiation coincides with asymmetric redistribution of Vangl2, Celsr1 and Fzd6 within the embryonic epidermal basal layer. Moreover, loss-of-function mutations in Vangl2 and Celsr1 show that they have an essential role in hair follicle polarization and orientation, which develop in part through non-autonomous mechanisms. Vangl2 and Celsr1 are both required for their planar localization in vivo, and physically associate in a complex in vitro. Finally, we provide in vitro evidence that homotypic intracellular interactions of Celsr1 are required to recruit Vangl2 and Fzd6 to sites of cell–cell contact.

• Publication year

  2008

• Venue

  Nature Cell Biology

• Publication date

  2008-09-16

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.1038/ncb1784PMID 18849982PMCID 2607065
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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