Fate-mapping of the epithelial seam during palatal fusion rules out epithelial-mesenchymal transformation - PubMed (original) (raw)

Comparative Study

. 2005 Sep 15;285(2):490-5.

doi: 10.1016/j.ydbio.2005.07.027.

Affiliations

Free article

Comparative Study

Fate-mapping of the epithelial seam during palatal fusion rules out epithelial-mesenchymal transformation

Forugh Vaziri Sani et al. Dev Biol. 2005.

Free article

Abstract

During palatogenesis, fusion of the palatine shelves is a crucial event, the failure of which results in the birth defect, cleft palate. The fate of the midline epithelial seam (MES), which develops transiently upon contact of the two palatine shelves, is still strongly debated. Three major mechanisms underlying the regression of the MES upon palatal fusion have been proposed: (1) apoptosis has been evidenced by morphological and molecular criteria; (2) epithelial-mesenchymal transformation has been suggested based on ultrastructural and lipophilic dye cell labeling observations; and (3) migration of MES cells toward the oral and nasal areas has been proposed following lipophilic dye cell labeling. To verify whether epithelial-mesenchymal transformation of MES cells takes place during murine palatal fusion, we used the Cre/lox system to genetically mark Sonic hedgehog- and Keratin-14-expressing palatal epithelial cells and to identify their fate in vivo. Our analyses provide conclusive evidence that rules out the occurrence of epithelial-mesenchymal transformation of MES cells.

PubMed Disclaimer

Similar articles

Cited by

Publication types

MeSH terms

Substances

LinkOut - more resources