关键词: 牙胚, 成釉细胞, 成牙本质细胞

Abstract:

Objective The Sonic hedgehog signalling peptide has been demonstrated to play important roles in the growth and patterning of the tooth development. This study aims on whether the antagonist β- transduction repeat containing protein of Sonic hedgehog signal transduction expressed in tooth germs ameloblast and odontoblast or not. Methods The mouse embryo heads of different developmental stages of E10.5, E13.5, E14.5, E16.5, E18.5 and P0, P3, P6 after birth were acquired fixed with 4% paraformaldehyde for 48 hours, embeded with Paraffin and examined using LsAB（labelled streptavidin- biotin）method to observe the β- TrCP expression pattern in tooth germs, ameloblast and odontoblast. Results It was demonstrated that β- TrCP expressed in oral epithelium, tooth bud, mesenchymal cell cytoplasm of ameloblast and odontoblast of different stage of tooth development. Conclusion β- TrCP expressed from early stage to later stage of murine tooth development. And these findings provide the evidence of antagonist regulatory pathways for shh in teeth development.

Key words: tooth germs, ameloblast, odontoblast