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Erschienen in: Calcified Tissue International 5/2010

01.11.2010

Circulating Fibroblast Growth Factor-23 Increases Following Intermittent Parathyroid Hormone (1–34) in Postmenopausal Osteoporosis: Association with Biomarker of Bone Formation

verfasst von: M. Sridharan, J. Cheung, A. E. Moore, M. L. Frost, W. D. Fraser, I. Fogelman, G. Hampson

Erschienen in: Calcified Tissue International | Ausgabe 5/2010

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Abstract

Uncertainties exist regarding whether FGF-23 production is influenced by PTH and its involvement in bone formation. We evaluated FGF-23 response and its relation to changes in biomarkers of bone formation following intermittent PTH treatment. Twenty-seven women with a mean [SD] age of 75.8 [5.4] years with postmenopausal osteoporosis were treated with PTH(1–34) for 18 months. Bone mineral density (BMD) was measured at 6 and 18 months at the lumbar spine (LS) and total hip (TH). Blood samples were obtained at baseline, 1–3, 6–9, and 12–18 months. Serum calcium, phosphate, PTH, 25(OH)vitamin D, 1,25(OH)2vitamin D, markers of bone turnover, FGF-23, and sclerostin were measured. BMD increased at both the LS (11.6%, P < 0.001) and TH (2.5%, P < 0.01). The bone formation marker P1NP increased early (baseline mean [SD] 39.9 [24.4] μg/l, 1–3 months 88 [37.9] μg/l; P < 0.001) and remained higher than baseline throughout 18 months. FGF-23 also increased, with a peak response at 6–9 months (increase 65%, P = 0.002). Serum phosphate remained stable. A significant increase in 1.25(OH)2vitamin D (P = 0.02) was seen at 1–3 months only. A small but significant reduction in sclerostin was seen at 6–9 (P = 0.02) and 12–18 months (P = 0.06). There was a positive correlation between changes in P1NP and FGF-23 (6–9 months r = 0.78, P < 0.001). FGF-23 is increased by intermittent PTH(1–34). This is related to early changes in P1NP, suggesting that the skeletal effects of PTH may involve FGF-23. Further studies are required to elucidate this.
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Metadaten
Titel
Circulating Fibroblast Growth Factor-23 Increases Following Intermittent Parathyroid Hormone (1–34) in Postmenopausal Osteoporosis: Association with Biomarker of Bone Formation
verfasst von
M. Sridharan
J. Cheung
A. E. Moore
M. L. Frost
W. D. Fraser
I. Fogelman
G. Hampson
Publikationsdatum
01.11.2010
Verlag
Springer-Verlag
Erschienen in
Calcified Tissue International / Ausgabe 5/2010
Print ISSN: 0171-967X
Elektronische ISSN: 1432-0827
DOI
https://doi.org/10.1007/s00223-010-9414-8

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Beginnen ältere Männer im Pflegeheim eine Antihypertensiva-Therapie, dann ist die Frakturrate in den folgenden 30 Tagen mehr als verdoppelt. Besonders häufig stürzen Demenzkranke und Männer, die erstmals Blutdrucksenker nehmen. Dafür spricht eine Analyse unter US-Veteranen.

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