In vitro odontoblast-like cell differentiation of cranial neural crest cells induced by fibroblast growth factor 8 and dentin non-collagen proteins

Cell Biol Int. 2008 Jun;32(6):671-8. doi: 10.1016/j.cellbi.2008.01.293. Epub 2008 Feb 3.

Abstract

During tooth development, cranial neural crest (CNC) cells represent a population of pluripotent stem cells that give rise to various dental tissues. This study aimed to investigate whether CNC cells could differentiate into odontoblast-like cells by in vitro induction. CNC cells were isolated from explants of cranial neural tubes and cultured in serum-free Dulbecco's modified Eagle's medium (DMEM)/F12 medium which contained fibroblast growth factor 8 (FGF8) and dentin non-collagen proteins (DNCP). The initiation of controlled differentiation was determined using histological assays, and the expression of specific gene phenotypes was detected using immunocytochemical staining and reverse transcription--polymerase chain reaction (RT--PCR). The first branchial arch phenotype of the CNC cells demonstrated negative Hoxa2 expression and positive vimentin expression in the presence of 100 ng/ml FGF8. Following DNCP induction, the CNC cells became bipolar, demonstrated high alkaline phosphatase (ALP) activity, and formed mineralized nodules. In addition, the expression of DSPP, DMP1, and collagen type I confirmed the odontoblast phenotype. The results indicate that the tissue-specific cellular differentiation (odontoblast-like cells) of early-stage embryonic-derived cells (such as CNC cells) can be induced by adult extracellular matrix proteins (such as DNCP). CNC cells may be used as a valuable cell model for research on dental tissue differentiation and regeneration.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Calcification, Physiologic
  • Cell Differentiation
  • Culture Media, Serum-Free
  • Dentin / metabolism
  • Extracellular Matrix Proteins / pharmacology*
  • Fibroblast Growth Factor 8 / pharmacology*
  • Mice
  • Mice, Inbred BALB C
  • Neural Crest / cytology*
  • Neural Crest / drug effects
  • Neural Crest / metabolism
  • Odontoblasts / cytology*
  • Pluripotent Stem Cells / cytology*
  • Pluripotent Stem Cells / drug effects
  • Pluripotent Stem Cells / metabolism
  • Skull / cytology
  • Skull / embryology*

Substances

  • Culture Media, Serum-Free
  • Extracellular Matrix Proteins
  • Fibroblast Growth Factor 8