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Serum fibroblast growth factor-23 levels in chronic haemodialysis patients

  • Nephrology - Original Paper
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Abstract

Background

Fibroblast growth factor-23 (FGF23) is a circulating factor that regulates renal reabsorption of inorganic phosphate. Serum FGF23 level is increased in chronic kidney disease (CKD) patients as a compensatory mechanism to hyperphosphataemia. FGF23 directly signals in the parathyroid glands and can be used to predict future secondary hyperparathyroidism in dialysis patients. We examined the relationship between FGF23 and serum calcium, phosphate, 1,25(OH)2D3, and PTH levels in haemodialysis patients.

Methods

FGF23 and the above mentioned characteristics were measured in 50 chronic haemodialysis patients. We analysed the correlation between FGF23 and the other characteristics by using the Pearson correlation coefficient and multiple regression analysis.

Results

FGF23 was significantly increased in haemodialysis patients compared with healthy controls (1525 ± 373 vs. 37 ± 9 pg/ml, P < 0.0001). There was a significant negative correlation between log FGF23 and 1,25(OH)2D3 (R = −0.375, P = 0.009) and a significant positive correlation between log FGF23 and log PTH values (R = 0.287, P = 0.041). In multiple regression analysis log PTH and 1,25(OH)2D3 values were independent predictors of log FGF23 (P = 0.037 and 0.009, respectively).

Conclusions

Our results revealed a marked increase in FGF23 levels in haemodialysis patients. PTH and vitamin D3 were independent predictors of FGF23 in the study group. Serum phosphate did not correlate with or predict FGF23 level despite the high prevalence of hyperphosphataemia in the study group.

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Authors and Affiliations

  1. Department of Medicine, Cairo University, Cairo, Egypt

    Salwa Ibrahim

  2. Department of Biochemistry, Cairo University, Cairo, Egypt

    Laila Rashed

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  1. Salwa Ibrahim
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  2. Laila Rashed
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Correspondence to Salwa Ibrahim.

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Ibrahim, S., Rashed, L. Serum fibroblast growth factor-23 levels in chronic haemodialysis patients. Int Urol Nephrol 41, 163–169 (2009). https://doi.org/10.1007/s11255-008-9466-0

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  • DOI: https://doi.org/10.1007/s11255-008-9466-0

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