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Bone turnover in spinal osteoporosis

Authors :
Julia S. Johansen
Karsten Thomsen
Bente Juel Riis
Jan Pødenphant
Claus Christiansen
Leth A
Source :
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research. 2(6)
Publication Year :
1987

Abstract

We have investigated biochemical indices of bone formation and bone resorption: serum alkaline phosphatase (sAP) plasma bone Gla protein (pBGP), fasting urinary hydroxyproline corrected for creatinine (FuHP/Cr), and fasting urinary calcium corrected for creatinine (FuCa/Cr) in 43 postmenopausal women with spinal fractures. Furthermore, histomorphometric indices of bone resorption and bone formation, as well as whole body retention (WBR) of 99m-technetium-diphosphonate (99mTc-DP), were determined. The results are compared to pre- and postmenopausal normal subjects. The results showed that indices of bone formation were mutually correlated except for sAP vs. WBR. sAP, WBR, and pBGP increased with age. sAP and WBR were not different between osteoporotics and age-matched controls, while pBGP and probably histological indices of bone formation were lower in osteoporotics than in age-matched controls. pBGP--and to a lesser extent sAP--were significantly correlated with all histological parameters reflecting bone formation. Finally, biochemical indices of bone resorption were high in osteoporotic patients and poorly correlated with histological bone resorption. The discrepancy between biochemical markers of bone formation may be related to the low sensitivity of sAP and WBR. Conversely, pBGP, sAP, and WBR may reflect different aspects of osteoblastic activity and bone mineralization. Finally, our data suggest that bone turnover increases with aging and that osteoporotic patients have higher bone resorption and probably lower bone formation than age-matched controls.

Details

ISSN :
08840431
Volume :
2
Issue :
6
Database :
OpenAIRE
Journal :
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research
Accession number :
edsair.doi.dedup.....ef1431986ed56360982a580417db16ae