NDLI: Odontoblasts induced from mesenchymal cells of murine dental papillae in three-dimensional cell culture

Content Provider	Springer Nature Link
Author	Kikuchi, Hiroshi Suzuki, Keiko Sakai, buhiro Yamada, Shoji
Copyright Year	2004
Abstract	In an organ culture system under a three-dimensional microenvironment that provides the conditions needed for odontoblast differentiation, a row of odontoblasts can be induced (Kikuchi et al. 1996, 2001). Therefore, in a newly designed three-dimensional cell culture system that fulfils the conditions necessary for odontoblast differentiation (Kikuchi et al. 2002), we examined whether dental papilla cells in rat mandibular incisors could differentiate into tubular dentine-forming cells. In our previously established organ culture system, CM-Dil-labeled cells that were microinjected into isolated dental papillae were replaced by a row of odontoblasts. In a three-dimensional cell culture system, which consists of two kinds of type I collagen in the upper layer over multi-layered cells seeded onto collagen containing Matrigel in the lower layer and which acts as a structural meshwork, dental papilla cells were incubated as multi-layered cells in an artificial extracellular matrix (ECM). The cells aggregated to form a cell mass and invaginated as a cell mass into the ECM. The cells also extended fine fibrillar processes into the ECM. With regard to invagination, the proteolytic activities of matrix metalloproteinase-2 (MMP-2)/membrane type 1-matrix metalloproteinase (MT 1-MMP) were observed on the outer multi-layers of cells within a cell mass adjacent to the ECM. The cell mass progressively shrank to about one-half to one-third of its original diameter and was organized as a tissue surrounded by a newly secreted ECM, like dental pulp-dentine. The cells adjacent to the secreted ECM were constructed as a row of polarized columnar cells. They extended slender processes into the new ECM, which is characteristic of tubular matrix. Dentine sialophosphoprotein (DSPP) and dentine matrix protein 1 (DMP 1) genes, which are specific for odontoblast differentiation, were expressed in an aggregated cell mass where tubular matrix-forming cells were induced. Furthermore, the tubular matrix became mineralized under prolonged culture. These results imply that the putative progenitor cells/stem cells residing in dental papillae can differentiate into odontoblasts under appropriate conditions in vitro.
Starting Page	173
Ending Page	185
Page Count	13
File Format	PDF
ISSN	0302766X
Journal	Cell and Tissue Research
Volume Number	317
Issue Number	2
e-ISSN	14320878
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-06-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Incisor dental papillae Three-dimensional cell culture Odontoblast differentiation Tissue organization Dentine sialophosphoprotein Rat (Wistar)
Content Type	Text
Resource Type	Article
Subject	Cell Biology Histology Pathology and Forensic Medicine

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