科研之友
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摘要
Background: Expression and/or excretion of fibroblast growth factor-23 (FGF23) and its co-receptor Klotho are altered in patients with end-stage renal disease. The possibility that the FGF23/alpha-Klotho system mediates the aggravated cardiovascular outcome among patients with chronic kidney disease (CKD) has been suggested. We determined whether FGF23 and alpha-Klotho concentrations are altered among patients with reduced renal function and proteinuria. Methods: Serum FGF23 and alpha-Klotho were measured in cardiology patients who were not undergoing chronic hemodialysis. Estimated glomerular filtration rate (eGFR) was correlated negatively with FGF23 and positively with alpha-Klotho. Results: The correlation between FGF23 and the renal tubular maximum reabsorption rate of phosphate to the GFR (TmP/GFR) was not significant, but that between FGF23 and serum calcium or inorganic phosphate was significant among patients with an estimated GFR of less than 60 mL/min/m(2). By stepwise multivariate regression analysis, eGFR was selected as significant predictor for FGF23 or alpha-Klotho among patients with an estimated GFR of less than 60 mL/min/m(2); however, urine albumin/creatinine ratio was not selected as a predictor for FGF23 or alpha-Klotho irrespective of the eGFR levels. In patients with eGFR of <60 mL/min/1.73 m(2), UACR was significantly associated with log(FGF23); but, this association did not remain statistically significant in a multivariate model. Conclusions: Among cardiology patients with various stages of CKD, serum concentrations of FGF23 and alpha-Klotho were associated with renal function, but not with the extent of proteinuria.
- 出版日期2014-9-8
