PMID: 22551879May 4, 2012Paper

Serum soluble α-klotho in hemodialysis patients

Clinical Nephrology
Keitaro YokoyamaTatsuo Hosoya

Abstract

The extracellular domain of klotho is cleaved and released into various extracellular fluids, such as blood, urine, and cerebrospinal fluid, as soluble α-klotho (sαKl). We measured sαKl in 53 hemodialysis patients and 20 healthy controls to examine its role in mineral metabolism. The sαKl level of the hemodialysis patients was 430 pg/ml (386 - 540 pg/ml, which was lower than that of healthy controls 740 pg/ml (550 - 913 pg/ml, p < 0.01). The serum sαKl level showed a positive correlation with serum phosphorus (P) (σ = 0.33, p = 0.014), while serum corrected Ca tended to be negatively correlated with sαKl (σ = -0.26, p = 0.06). Both parameters showed the same trends in healthy subjects. However, there was no significant association between serum sαKl and age (σ= 0.21, p = 0.14), intact PTH (σ = -0.08, p= 0.55), whole PTH (σ = -0.08, p = 0.59), or FGF23 (σ = -0.07, p = 0.62). Multiple regression analysis showed that P was independently associated with the serum sαKl levels (total adjusted R2 = 0.18, p = 0.02). The sαKl level was lower in hemodialysis patients than in healthy persons. Serum P level was independently associated with the serum sαKl level.

Citations

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