Abstract
Background
Fibroblast growth factor 23 (FGF-23) is a circulating factor that acts as a phosphaturic factor in the kidneys. It is also involved in several disorders of phosphate regulation and bone metabolism. We hypothesized that increased FGF-23 levels in patients with endstage renal disease (ESRD) on maintenance hemodialysis would be associated with increased bone demineralization, and we analyzed the relationship between FGF-23 levels and bone mineral density (BMD).
Methods
The serum level of FGF-23 was measured in this cross-sectional study, whose subjects consisted of 54 patients with ESRD on maintenance hemodialysis. Clinical parameters associated with hemodialysis and bone metabolism were measured. The relationship between serum FGF-23 and BMD and the factors affecting the serum level of FGF-23 were analyzed.
Results
Serum FGF-23 levels were significantly higher in ESRD patients on maintenance hemodialysis than in normal persons (2961.4 vs. 30 pg/ml). Multiple regression analysis showed that increasing FGF-23 levels were associated with serum phosphate (r = 0.684, P < 0.001), but not with BMD or other bone metabolism factors. Factors affecting log10FGF-23 included the serum calcium phosphate product (β = 0.603) and K t/V (integrated fractional clearance expressed per dialysis, β = −0.244). These results were also seen in an analysis of the correlations based on T score or gender.
Conclusions
FGF-23 levels were positively associated with serum phosphate levels but were not correlated with BMD. The only factors affecting log10FGF-23 were the serum calcium phosphate product and K t/V. These findings suggest that FGF-23 may have no direct effect on bone mineralization, and further studies are warranted to examine the effects of FGF-23 on vitamin D metabolism.
Similar content being viewed by others
References
Yamashita T, Yoshioka M, Itoh N. Identification of a novel fibroblast growth factor, FGF-23, preferentially expressed in the ventrolateral thalamic nucleus of the brain. Biochem Biophys Res Commun. 2000;277:494–8.
Weber TJ, Liu S, Indridason OS, Quarles LD. Serum FGF23 levels in normal and disordered phosphorus homeostasis. J Bone Miner Res. 2003;18:1227–34.
Imanishi Y, Inaba M, Nakatsuka K, Nagasue K, Okuno S, Yoshihara A, et al. FGF-23 in patients with end-stage renal disease on hemodialysis. Kidney Int. 2004;65:1943–6.
Mirams M, Robinson BG, Mason RS, Nelson AE. Bone as a source of FGF23: regulation by phosphate? Bone. 2004;35:1192–9.
Liu S, Zhou J, Tang W, Jiang X, Rowe DW, Quarles LD. Pathogenic role of FGF23 in Hyp mice. Am J Physiol Endocrinol Metab. 2006;291:E38–49.
Sitara D, Razzaque MS, Hesse M, Yoganathan S, Taguchi T, Erben RG, et al. Homozygous ablation of fibroblast growth factor-23 results in hyperphosphatemia and impaired skeletogenesis, and reverses hypophosphatemia in Phex-deficient mice. Matrix Biol. 2004;23:421–32.
Saito H, Kusano K, Kinosaki M, Kinosaki M, Ito H, Hirata M, et al. Human fibroblast growth factor-23 mutants suppress Na+-dependent phosphate co-transport activity and 1alpha,25-dihydroxyvitamin D3 production. J Biol Chem. 2003;278:2206–11.
Inoue Y, Segawa H, Kaneko I, Yamanaka S, Kusano K, Kawakami E, et al. Role of the vitamin D receptor in FGF23 action on phosphate metabolism. Biochem J. 2005;390:325–31.
Baum M, Schiavi S, Dwarakanath V, Quigley R. Effect of fibroblast growth factor-23 on phosphate transport in proximal tubules. Kidney Int. 2005;68:1148–53.
Shimada T, Yamazaki Y, Takahashi M, Hasegawa H, Urakawa I, Oshima T, et al. Vitamin D receptor independent FGF23 actions in regulating phosphate and vitamin D metabolism. Am J Physiol Renal Physiol. 2005;289:F1088–95.
Kuro OM. Klotho as a regulator of fibroblast growth factor signaling and phosphate/calcium metabolism. Curr Opin Nephrol Hypertens. 2006;15:437–41.
National Kidney Foundation. K/DOQI clinical practice guidelines for hemodialysis adequacy, 2000. Am J Kidney Dis. 2001;37(Suppl 1):S7–64.
Marsell R, Mirza MAI, Mallmin H, Karlsson M, Mellström D, Orwoll E, et al. Relation between fibroblast growth factor-23, body weight and bone mineral density in elderly men. Osteoporos Int. 2009;20:1167–73.
Portale AA, Booth BE, Halloran BP, Morris RC Jr. Effect of dietary phosphorus on circulating concentrations of 1,25-dihydroxyvitamin D and immunoreactive parathyroid hormone in children with moderate renal insufficiency. J Clin Invest. 1984;73:1580–9.
Nagano N, Miyata S, Abe M, Kobayashi N, Wakita S, Yamashita T, et al. Effect of manipulating serum phosphorus with phosphate binder on circulating PTH and FGF23 in renal failure rats. Kidney Int. 2006;69:531–7.
Khachigian LM. Early growth response-1 in cardiovascular pathobiology. Circ Res. 2006;98:186–91.
Qunibi WY, Abouzahr F, Mizani MR, Nolan CR, Arya R, Hunt KJ. Cardiovascular calcification in Hispanic Americans (HA) with chronic kidney disease (CKD) due to type 2 diabetes. Kidney Int. 2005;68:271–7.
Mehrotra R. Disordered mineral metabolism and vascular calcification in nondialyzed chronic kidney disease patients. J Ren Nutr. 2006;16:100–8.
Larsson T, Nisbeth U, Ljunggren Ö, Jüppner H, Jonsson KB. Circulating concentration of FGF-23 increases as renal function declines in patients with chronic kidney disease, but does not change in response to variation in phosphate intake in healthy volunteers. Kidney Int. 2003;64:2272–9.
Gutierrez O, Isakova T, Rhee E, Shah A, Holmes J, Collerone G, et al. Fibroblast growth factor-23 mitigates hyperphosphatemia but accentuates calcitriol deficiency in chronic kidney disease. J Am Soc Nephrol. 2005;16:2205–15.
Shigematsu T, Kazama JJ, Yamashita T, Fukumoto S, Hosoya T, Gejyo F, et al. Possible involvement of circulating fibroblast growth factor 23 in the development of secondary hyperparathyroidism associated with renal insufficiency. Am J Kidney Dis. 2004;44:250–6.
Torres PU, Friedlander G, Vernejoul MC, Silve C, Prié D. Bone mass does not correlate with the serum fibroblast growth factor 23 in hemodialysis patients. Kidney Int. 2008;73:102–7.
Stubbs J, Liu S, Quarles LD. Role of fibroblast growth factor 23 in phosphate homeostasis and pathogenesis of disordered mineral metabolism in chronic kidney disease. Semin Dial. 2007;20:302–8.
Gutiérrez OM, Mannstadt M, Isakova T, Rauh-Hain JA, Tamez H, Shah A, et al. Fibroblast growth factor 23 and mortality among patients undergoing hemodialysis. N Engl J Med. 2008;359:584–92.
Sitara D, Kim S, Razzaque, Bergwitz C, Taguchi T, Schüler C, et al. Genetic evidence of serum phosphate-independent functions of FGF-23 on bone. PLoS Genet. 2008;4:e1000154.
Stubbs JR, Liu S, Tang W, Zhou J, Wang Y, Yao X, et al. Role of hyperphosphatemia and 1,25 dihydroxyvitamin D in vascular calcification and mortality in fibroblastic growth factor 23 null mice. J Am Soc Nephrol. 2007;18:2116–24.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Park, SY., Jeong, KH., Moon, JY. et al. The relationship between circulating fibroblast growth factor 23 and bone metabolism factors in Korean hemodialysis patients. Clin Exp Nephrol 14, 239–243 (2010). https://doi.org/10.1007/s10157-010-0272-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10157-010-0272-5