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Erschienen in: Osteoporosis International 9/2009

01.09.2009 | Review

Is bone quality associated with collagen age?

verfasst von: D. J. Leeming, K. Henriksen, I. Byrjalsen, P. Qvist, S. H. Madsen, P. Garnero, M. A. Karsdal

Erschienen in: Osteoporosis International | Ausgabe 9/2009

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Abstract

The World Health Organization defines osteoporosis as a systemic disease characterized by decreased bone tissue mass and microarchitectural deterioration, resulting in increased fracture risk. Since this statement, a significant amount of data has been generated showing that these two factors do not cover all risks for fracture. Other independent clinical factors, such as age, as well as aspects related to qualitative changes in bone tissue, are believed to play an important role. The term “bone quality” encompasses a variety of parameters, including the extent of mineralization, the number and distribution of microfractures, the extent of osteocyte apoptosis, and changes in collagen properties. The major mechanism controlling these qualitative factors is bone remodeling, which is tightly regulated by the osteoclast/osteoblast activity. We focus on the relationship between bone remodeling and changes in collagen properties, especially the extent of one posttranslational modification. In vivo, measurements of the ratio between native and isomerized C-telopeptides of type I collagen provides an index of bone matrix age. Current preclinical and clinical studies suggests that this urinary ratio provides information about bone strength and fracture risk independent of bone mineral density and that it responds differently according to the type of therapy regulating bone turnover.
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Metadaten
Titel
Is bone quality associated with collagen age?
verfasst von
D. J. Leeming
K. Henriksen
I. Byrjalsen
P. Qvist
S. H. Madsen
P. Garnero
M. A. Karsdal
Publikationsdatum
01.09.2009
Verlag
Springer-Verlag
Erschienen in
Osteoporosis International / Ausgabe 9/2009
Print ISSN: 0937-941X
Elektronische ISSN: 1433-2965
DOI
https://doi.org/10.1007/s00198-009-0904-3

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