P Wanby1, R Nobin2, S-P Von3, L Brudin4, M Carlsson3. 1. Section of Endocrinology, Department of Internal Medicine, County Hospital of Kalmar, 391 85, Kalmar, Sweden. PerW@LTKalmar.se. 2. Department of Orthopedics, County Hospital of Kalmar, Kalmar, Sweden. 3. Department of Clinical Chemistry, County Hospital of Kalmar, Kalmar, Sweden. 4. Department of Clinical Physiology, County Hospital of Kalmar, Kalmar, Sweden.
Abstract
BACKGROUND: Bone turnover markers have a potential clinical use in describing bone remodeling and in predicting fractures. AIMS: In an elderly population ≥75 years with a fresh hip fracture, and in healthy controls, investigate bone turnover markers and their relation to each other, to vitamin D status and to bone mineral density (BMD). METHODS: In a cross-sectional study serum levels of dickkopf-1 (DKK-1), sclerostin (SOST), osteoprotegerin (OPG), osteopontin (OPN), osteocalcin, 25-hydroxyvitamin D (25(OH)D) were analyzed in 89 Swedish patients with a fresh hip fracture and in 82 healthy volunteers. Serum levels of bone markers were determined by Luminex technique. RESULTS: S-25-hydroxyvitamin D (S-25(OH)D) was decreased in patients compared to controls (48 ± 21 vs. 76 ± 25 nmol/L, p < 0.001). SOST, but none of the other bone turnover markers correlated with BMD (r = 0.50, p < 0.001). Compared with controls, higher levels of OPG (488 ± 1.4 vs. 191 ± 1.4 ng/L, p < 0.001), OPN (69 ± 1.7 vs. 19 ± 1.4 µg/L, p < 0.001), DKK-1 (273 ± 1.7 vs. 168 ± 1.7 ng/L, p < 0.001), and lower levels of osteocalcin (5.8 ± 3.5 vs. 9.5 ± 3.6 µg/L, p < 0.001), were found in the fracture group. Levels of OPG, DKK-1 and SOST in both groups were positively associated. S-25(OH)D concentration was not found to be strongly associated with any of the bone markers. CONCLUSIONS: In contrast to findings in other studies, we found no strong correlation between 25(OH)D and the investigated bone markers. Both in patients with a fresh hip fracture and in healthy elderly, DKK-1, SOST and OPG appear to be associated. This suggests a relevance in these relationships meriting further investigation.
BACKGROUND: Bone turnover markers have a potential clinical use in describing bone remodeling and in predicting fractures. AIMS: In an elderly population ≥75 years with a fresh hip fracture, and in healthy controls, investigate bone turnover markers and their relation to each other, to vitamin D status and to bone mineral density (BMD). METHODS: In a cross-sectional study serum levels of dickkopf-1 (DKK-1), sclerostin (SOST), osteoprotegerin (OPG), osteopontin (OPN), osteocalcin, 25-hydroxyvitamin D (25(OH)D) were analyzed in 89 Swedish patients with a fresh hip fracture and in 82 healthy volunteers. Serum levels of bone markers were determined by Luminex technique. RESULTS:S-25-hydroxyvitamin D (S-25(OH)D) was decreased in patients compared to controls (48 ± 21 vs. 76 ± 25 nmol/L, p < 0.001). SOST, but none of the other bone turnover markers correlated with BMD (r = 0.50, p < 0.001). Compared with controls, higher levels of OPG (488 ± 1.4 vs. 191 ± 1.4 ng/L, p < 0.001), OPN (69 ± 1.7 vs. 19 ± 1.4 µg/L, p < 0.001), DKK-1 (273 ± 1.7 vs. 168 ± 1.7 ng/L, p < 0.001), and lower levels of osteocalcin (5.8 ± 3.5 vs. 9.5 ± 3.6 µg/L, p < 0.001), were found in the fracture group. Levels of OPG, DKK-1 and SOST in both groups were positively associated. S-25(OH)D concentration was not found to be strongly associated with any of the bone markers. CONCLUSIONS: In contrast to findings in other studies, we found no strong correlation between 25(OH)D and the investigated bone markers. Both in patients with a fresh hip fracture and in healthy elderly, DKK-1, SOST and OPG appear to be associated. This suggests a relevance in these relationships meriting further investigation.
Entities:
Keywords:
Bone mineral density; DXA; Magpix; Osteoporosis; PTH; Vitamin D deficiency
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