TGF-beta2 stimulates cranial suture closure through activation of the Erk-MAPK pathway.

Abstract:

:Cranial sutures are important growth sites of the skull. During suture closure, the dura mater is one of the most important sources of various positive and negative regulatory signals. Previous results indicate that TGF-beta2 from dura mater strongly accelerates suture closure, however, its exact regulatory mechanism is still unclear. In this study, we confirmed that removal of dura mater in calvarial organ culture strongly accelerates sagittal suture closure and that this effect is further enhanced by TGF-beta2 treatment. TGF-beta2 stimulated cell proliferation in the MC3T3-E1 cell line. Similarly, it stimulated the proliferation of cells in the sutural space in calvarial organ culture. Furthermore, TGF-beta2-mediated enhanced cell proliferation and suture closure were almost completely inhibited by an Erk-MAPK blocker, PD98059. These results indicate that TGF-beta2-induced activation of Erk-MAPK is an important signaling component that stimulates cell proliferation to enrich osteoprogenitor cells, thereby promoting their differentiation into osteoblasts to achieve a rapid calvarial bone expansion.

journal_name

J Cell Biochem

authors

Lee SW,Choi KY,Cho JY,Jung SH,Song KB,Park EK,Choi JY,Shin HI,Kim SY,Woo KM,Baek JH,Nam SH,Kim YJ,Kim HJ,Ryoo HM

doi

10.1002/jcb.20773

subject

Has Abstract

pub_date

2006-07-01 00:00:00

pages

981-91

issue

4

eissn

0730-2312

issn

1097-4644

journal_volume

98

pub_type

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