RRC ID |
62307
|
Author |
Kubota T, Hasuike A, Tsukune N, Ozawa Y, Yamamoto T, Min S, Naito M, Sato S.
|
Title |
Influence of estrogen deficiency on guided bone augmentation: investigation of rat calvarial model and osteoblast-like MC3T3-E1 cells.
|
Journal |
Eur J Oral Sci
|
Abstract |
The effect of estrogen deficiency in bone augmentation, and the mechanisms by which estrogen deficiency impedes osteoblast differentiation and collagen matrix production, were examined. Twenty female Jcl:Wistar rats were divided into two groups: ovariectomized rats; and control rats. Guided bone augmentation was performed by positioning plastic caps in the calvarium of all animals at 8 wk after ovariectomy or sham surgery. Micro-computed tomography and histological sections were used to determine the amount of bone augmentation within the plastic caps. At 8 wk, there was statistically significantly less newly formed bone volume in ovariectomized rats. Immunohistological staining revealed the rare alignment of runt-related transcription factor 2-positive osteoblast-like cells and collagen I-positive bundle fibers in ovariectomized rats. In cell culture experiments, pre-osteoblast-like cells, MC3T3-E1, were treated with the estrogen receptor antagonist, fulvestrant. In treated cells, alkaline phosphatase activity remained high, whereas Alizarin Red staining was completely inhibited. Extracellular staining intensity of collagen I was decreased after fulvestrant treatment. Consistent with these observations, gene-expression analysis confirmed that fulvestrant treatment led to weaker expression of mRNA for osteogenic transcription factors and bone matrix protein-related genes. The results demonstrate that estrogen deficiency suppresses osteoblast differentiation and collagen matrix production in bone augmentation.
|
Volume |
126(3)
|
Pages |
206-213
|
Published |
2018-6-1
|
DOI |
10.1111/eos.12415
|
PMID |
29676477
|
MeSH |
Animals
Bone Regeneration / physiology*
Cell Differentiation
Core Binding Factor Alpha 1 Subunit
Estrogens / deficiency*
Female
Guided Tissue Regeneration*
Osteoblasts / cytology
Osteoblasts / physiology*
Ovariectomy
RNA, Messenger / metabolism
Rats
Rats, Wistar
X-Ray Microtomography
|
IF |
2.22
|
Resource |
Human and Animal Cells |
MC3T3-E1(RCB1126) |