Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/82790
Citations
Scopus Web of Science® Altmetric
?
?
Type: Conference paper
Title: Analysis of vitamin D metabolism gene expression in human bone: evidence for autocrine control of bone remodelling
Author: Ormsby, R.
Findlay, D.
Kogawa, M.
Anderson, P.
Morris, H.
Atkins, G.
Citation: The Journal of Steroid Biochemistry and Molecular Biology, 2014 / Bikle, D., Norman, A., Welsh, J. (ed./s), vol.144, iss.Part A, pp.110-113
Publisher: Elsevier
Issue Date: 2014
ISSN: 0960-0760
1879-1220
Conference Name: 16th Vitamin D Workshop (11 Jun 2013 - 14 Jun 2013 : San Francisco, CA, USA)
Statement of
Responsibility: 
Renee T. Ormsby, David M. Findlay, Masakazu Kogawa, Paul H. Anderson, Howard A. Morris, Gerald J. Atkins
Abstract: The metabolism of 25-hydroxyvitamin D (25D) to active 1α,25-dihydroxyvitamin D (1,25D) by endogenous expression of 25D 1-α hydroxylase (CYP27B1) in bone cells appears to have functional effects in both osteoclasts and osteoblasts. To examine relationships between CYP27B1 expression in bone and its potential function in vivo, we examined the expression of vitamin D metabolism genes (CYP27B1, CYP24A1, VDR) in human trabecular bone samples and compared them by linear regression analysis with the expression of osteoclast (TRAP, CA2, CATK, NFATC1), osteoblast (TNAP, COL1A1, OCN, MEPE, BRIL), osteocyte (DMP1, SOST, PHEX, MEPE, FGF23)-related gene markers, genes associated with osteoblast/osteocyte control of osteoclastogenesis (RANKL, M-CSF, OPG, IL-8, TWEAK) and transcription factors (NFATC1, RUNX2, OSX, MSX2, HIF1A). This revealed multiple significant gene expression relationships between CYP27B1 and the transcription factors RUNX2, NFATC1, consistent with the coordinated expression of this gene by both osteoblast and osteoclast-lineage cells, and with MSX2 and the hypoxia-inducible transcription factor, HIF1A. CYP27B1 expression associated mainly with gene markers of bone resorption. VDR mRNA expression was also associated with resorption-related genes. Against expectations, CYP27B1 expression did not associate with bone expressed genes known to be 1,25D responsive, such as OCN, RANKL and DMP1. The major implication of these relationships in gene expression is that endogenous 1,25D synthesis and the response to 1,25D in human trabecular bone is linked with coordinated functions in both the osteoclastic and osteoblastic compartments towards the control of bone remodelling. This article is part of a Special Issue entitled '16th Vitamin D Workshop'.
Keywords: Vitamin D; CYP27B1; Bone; Osteocyte; Osterix; Runx2; Autocrine; Bone remodelling
Description: Available online 10 October 2013
Rights: © 2013 Elsevier Ltd. All rights reserved.
RMID: 0020136300
DOI: 10.1016/j.jsbmb.2013.09.016
Grant ID: http://purl.org/au-research/grants/nhmrc/1004871
Appears in Collections:Orthopaedics and Trauma publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.