Clinical Focus ›› 2016, Vol. 31 ›› Issue (3): 299-302.doi: 10.3969/j.issn.1004-583X.2016.03.017

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Association of fibroblast growth factor 23 with renal function and calcium-phosphorus metabolism in patients with chronic kidney disease

Zhu Yinghui,Li Guogang   

  1. Department of Nephrology,Shijingshan Teaching Hospital of Capital Medical University, Beijing Shijingshan Hospital,Beijing 100043,China
  • Received:2015-11-10 Online:2016-03-05 Published:2016-04-18
  • Contact: Zhu Yinghui,Email:chenrx87@126.com

Abstract: Objective To investigate the change of fibroblast growth factor 23(FGF-23) in patients with different stages of chronic kidney disease(CKD); To analyze the association of FGF-23 with renal function and calcium-phosphorus metabolism.Methods A total of 124 CKD patients were selected, and 32 healthy people were studied as control group. The levels of FGF-23, serum calcium, serum phosphorus, intact parathyroid hormone(iPTH),blood urea nitrogen(BUN) and serum creatinine(SCr) were measured in all subjects. The glomerular filtration rate(eGFR) was estimated according to CKD-EPI formula. The association of FGF-23 with renal function and calcium-phosphorus metabolism were analyzed.Results The serum FGF-23 in CKD patients increased more significantly than that in control group(P<0.01). The levels of serum FGF-23 and iPTH increased gradually with the decline of renal function. There were significant difference in FGF-23 and iPTH between CKD3-4 stages and control group (all P<0.01). The levels of serum FGF-23 and iPTH in CKD 5 stage increased more significantly than those in control group,CKD1-2 stages and CKD3-4 stages. With the decline of renal function,the level of serum calcium reduced gradually in CKD patients, serum phosphorus increased gradually in CKD patients. There were significant difference in serum calcium, serum phosphorus between CKD5 stage and control group,CKD1-2 stages,CKD3-4 stages (all P<0.01).The correlations showed that LogFGF-23 was positively correlated with serum phosphorus, LogiPTH, BUN and SCr.FGF-23 was negatively correlated with eGFR. Multiple linear regression analysis indicated that FGF-23 was positively correlated with BUN and SCr.Conclusion Serum FGF-23 increases significantly in CKD3-4 stages. FGF-23 increases earlier than serum phosphorus. FGF-23 is correlated significantly with renal function, serum phosphorus and iPTH. Renal function is an independent influence factor for FGF-23 increase in CKD patients.

Key words: kidney diseases, intercellular signaling pepatides and proteins, phosphorus, parathyroid hormone

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