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- W2004253600 abstract "Elevated fibroblast growth factor 23 (FGF23) levels are associated with cardiovascular mortality in patients with chronic kidney disease. However, both clinical and basic research have demonstrated conflicting evidence regarding the pathophysiological role of FGF23 in vascular calcification. The aim of this study was to determine the role of FGF23 in the osteoblastic gene expression in vascular smooth muscle cells (SMCs).We transduce human aortic SMCs (HASMCs) expressing klotho and FGF receptors with the adenovirus expressing human FGF23 (Ad-FGF23).We observed significant decreases in the expression of osteoblast-marker genes including BMP2, BMP4, MSX2, RUNX2 and ALP, as well as reduced calcification. Notably, Ad-FGF23 increased mRNA and protein levels of osteoprotegerin (OPG), and human OPG promoter was activated by FGF23. Moreover, in HASMCs overexpressing klotho, FGF23 upregulated OPG expression, whereas depletion of klotho by siRNA attenuated FGF23-induced OPG expression. Furthermore, in 73 consecutive patients with type 2 diabetes mellitus undergoing cardiac computed tomography to determine coronary calcium scores (CCSs), serum FGF23 levels were positively correlated with OPG independent of phosphate and estimated glomerular filtration rate (eGFR, r = 0.65, p < 0.01). Serum FGF23 levels were significantly elevated in patients with high CCSs (≧100) compared to those with low CCSs (<100).Our in vitro results indicate that FGF23 suppresses osteoblastic gene expression and induces OPG expression in HASMCs. Together with our cross-sectional clinical assessment, the present study lends support to our hypothesis that FGF23 counteracts osteogenic conversion of vascular SMCs as a part of a compensatory mechanism to mitigate vascular calcification." @default.
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- W2004253600 date "2012-05-01" @default.
- W2004253600 modified "2023-09-30" @default.
- W2004253600 title "Variation in the klotho gene is not associated with mortality risk among elderly men in MR OS Sweden" @default.
- W2004253600 doi "https://doi.org/10.1016/j.bone.2012.02.314" @default.
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