start-ver=1.4
cd-journal=joma
no-vol=67
cd-vols=
no-issue=2
article-no=
start-page=107
end-page=116
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2018
dt-pub=20180816
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Expression of Non-collagenous Bone Matrix Proteins in Osteoblasts Stimulated by Mechanical Stretching in the Cranial Suture of Neonatal Mice
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract= We investigated the influence of mechanical stretching on the genetic expression pattern of non-collagenous bone matrix proteins in osteoblasts. The cranial sutures of neonatal mice were subjected to ex vivo mechanical stretching. In the non-stretched control group, as osteoblast differentiation progressed, the successive genetic expression of bone sialoprotein (BSP), osteopontin (OPN), and osteocalcin (OCN) was detected using in situ hybridization, in that order. In the stretched group, the sutures were widened, and after 24 hr of cultivation, a large number of osteoblasts and abundant new osteoid were observed on the borders of the parietal bones. All new osteoblasts expressed BSP and some of them expressed OPN, but very few of them expressed OCN. After 48 hr, more extensive presence of osteoid was noted on the borders of the parietal bones, and this osteoid was partially mineralized; all osteoblasts on the osteoid surface expressed BSP, and more osteoblasts expressed OPN than those after 24 hr cultivation. Surprisingly, many of the osteoblasts that did not express OPN, expressed OCN. This suggests that when osteoblast differentiation is stimulated by mechanical stress, the genetic expression pattern of non-collagenous proteins in the newly differentiated osteoblasts is affected.
en-copyright=
kn-copyright=

en-aut-name=IkegameMika
en-aut-sei=Ikegame
en-aut-mei=Mika
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=EjiriSadakazu
en-aut-sei=Ejiri
en-aut-mei=Sadakazu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=OkamuraHirohiko
en-aut-sei=Okamura
en-aut-mei=Hirohiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=Department of Oral Morphology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
kn-affil=

affil-num=2
en-affil=Department of Oral Anatomy, School of Dentistry, Asahi University
kn-affil=

affil-num=3
en-affil=Department of Oral Morphology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
kn-affil=
en-keyword=mechanical loading
kn-keyword=mechanical loading
en-keyword=non-collagenous bone proteins
kn-keyword=non-collagenous bone proteins
en-keyword=ossification
kn-keyword=ossification
en-keyword=sagittal sutures
kn-keyword=sagittal sutures
END