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Hyperosmotic Stimulus Down-regulates 1alpha, 25-dihydroxyvitamin D(3)-induced Osteoclastogenesis by Suppressing the RANKL Expression in a Co-culture System

Authors
 Yu Shun Tian  ;  Hyun Joo Jeong  ;  Sang-Do Lee  ;  Seok Heui Kong  ;  Seung-Ho Ohk  ;  Yun-Jung Yoo  ;  Jeong-Taeg Seo  ;  Dong Min Shin  ;  Byung-Wha Sohn  ;  Syng-Ill Lee 
Citation
 KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY, Vol.14(3) : 169-176, 2010-06 
Journal Title
KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY
ISSN
 1226-4512 
Issue Date
2010-06
Keywords
Hyperosmotic stimulus ; Osteoblast ; RANKL ; Runx2 ; TonEBP
Abstract
The hyperosmotic stimulus is regarded as a mechanical factor for bone remodeling. However, whether the hyperosmotic stimulus affects 1alpha, 25-dihydroxyvitamin D(3) (1alpha,25(OH)(2)D(3))-induced osteoclastogenesis is not clear. In the present study, the effect of the hyperosmotic stimulus on 1alpha,25(OH)(2)D(3)-induced osteoclastogenesis was investigated in an osteoblast-preosteoclast co-culture system. Serial doses of sucrose were applied as a mechanical force. These hyperosmotic stimuli significantly evoked a reduced number of 1alpha,25(OH)(2)D(3)-induced tartrate-resistant acid phosphatase-positive multinucleated cells and 1alpha,25(OH)(2)D(3)-induced bone-resorbing pit area in a co-culture system. In osteoblastic cells, receptor activator of nuclear factor kappaB ligand (RANKL) and Runx2 expressions were down-regulated in response to 1alpha,25(OH)(2)D(3). Knockdown of Runx2 inhibited 1alpha,25(OH)(2)D(3)-induced RANKL expression in osteoblastic cells. Finally, the hyperosmotic stimulus induced the overexpression of TonEBP in osteoblastic cells. These results suggest that hyperosmolarity leads to the down-regulation of 1alpha,25(OH)(2)D(3)-induced osteoclastogenesis, suppressing Runx2 and RANKL expression due to the TonEBP overexpression in osteoblastic cells.
Files in This Item:
T201002168.pdf Download
DOI
10.4196/kjpp.2010.14.3.169
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Seo, Jeong Taeg(서정택) ORCID logo https://orcid.org/0000-0003-2697-0251
Shin, Dong Min(신동민) ORCID logo https://orcid.org/0000-0001-6042-0435
Yoo, Yun Jung(유윤정) ORCID logo https://orcid.org/0000-0002-0045-9597
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/178655
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