Summary
Wnt signaling plays an important role in the bone development and remodeling. The Wnt antagonist Dkk-1 is a potent inhibitor of bone formation. The aims of this study were firstly to compare the serum Dkk-1 levels in postmenopausal osteoporosis patients with age-matched healthy controls, and secondly, to assess the possible relationship between Dkk-1 and β-catenin, sclerostin, or bone turnover markers [CTX, PINP, N-MID-OT and 25(OH)D] in the setting of postmenopausal osteoporosis. A total of 350 patients with postmenopausal osteoporosis and 150 age-matched healthy controls were enrolled, and the serum levels of Dkk-1, β-catenin, sclerostin, OPG, and RANKL were detected by ELISA, and bone turnover markers [CTX, PINP, N-MID-OT and 25(OH)D] were measured by Roche electrochemiluminescence system in two groups. Serum Dkk-1 levels were significantly higher in postmenopausal osteoporosis group than in control group (P<0.001). Univariate analyses revealed that serum Dkk-1 levels were weakly negatively correlated to β-catenin (r=−0.161, P=0.003) and OPG (r=−0.106, P=0.047), while multiple regression analysis showed a negative correlation between serum Dkk-1 levels with β-catenin (β=−0.165, P=0.009) and BMD (β=−0.139, P=0.027), and a positive correlation between serum Dkk-1 levels and CTX (β=0.122, P=0.040) in postmenopausal osteoporosis group. No similar correlations ware observed in control group. The results provided evidence for the role of Dkk-1 in bone metabolism and demonstrated the link of Dkk-1 and Wnt/β-catenin in some ways.
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The authors contributed equally to this work.
This project was supported by grants from National Natural Science Foundation of China (No. 81473492 and No. 81273907), and Health Department of Hubei Province, China (No. 2012Z-Z01).
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Tian, J., Xu, Xj., Shen, L. et al. Association of serum Dkk-1 levels with β-catenin in patients with postmenopausal osteoporosis. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 35, 212–218 (2015). https://doi.org/10.1007/s11596-015-1413-6
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DOI: https://doi.org/10.1007/s11596-015-1413-6