Fibroblast Growth Factor 23 in Feline Chronic Kidney Disease

Journal of Veterinary Internal Medicine

R.F. Geddes¹  N.C. Finch²  J. Elliott² 

[1] Department of Veterinary Clinical Sciences, Royal Veterinary College, Hatfield, UK;Department of Veterinary Basic Sciences, Royal Veterinary College, London, UK

关键词: Azotemia;    Cat;    Hyperparathyroidism;    Phosphate;    PTH;   

DOI  :  10.1111/jvim.12044

来源: Wiley

【 摘 要 】

Abstract

Background

Fibroblast growth factor 23 (FGF-23) is a phosphaturic hormone involved in the pathogenesis of secondary renal hyperparathyroidism (SRHP) in humans. There are no published studies examining feline FGF-23.

Objectives

Validation of a method for FGF-23 quantification in feline plasma and assessment of the associations among plasma FGF-23, PTH, creatinine, and phosphate concentrations in cats with chronic kidney disease (CKD).

Animals

One hundred nonazotemic and azotemic geriatric (>9 years) client-owned cats.

Methods

Retrospective cross-sectional study: Cats were categorized into 4 groups: control group (plasma creatinine (Cr) ≤2.0 mg/dL), stage 2 (Cr 2.1–2.8 mg/dL), stage 3 (Cr 2.9–5.0 mg/dL), stage 4 (Cr >5.0 mg/dL). Stages 2 and 3 were further subdivided based on International Renal Interest Society targets for plasma phosphate concentration (PO₄): stage 2a (PO₄ ≤4.5 mg/dL), stage 2b (PO₄ >4.5 mg/dL), stage 3a (PO₄ ≤5 mg/dL), stage 3b (PO₄ >5 mg/dL). Plasma FGF-23 concentrations were measured by a human intact FGF-23 ELISA. Descriptive statistics and linear regression were performed.

Results

The ELISA demonstrated acceptable precision, reproducibility, and specificity. Plasma FGF-23 concentrations increased with increasing plasma creatinine concentrations and were significantly different between all groups (P < .008). Plasma FGF-23 concentrations were significantly higher in cats in stage 2b than stage 2a (P = .008) and in stage 3b than in stage 3a (P = .012). Phosphate, log creatinine, total calcium, log parathyroid hormone, and packed cell volume were all independent predictors of FGF-23.

Conclusions and Clinical Importance

FGF-23 concentrations increase with increasing stage of feline CKD and might be a marker or mediator of feline SRHP.

【 授权许可】

Unknown   
Copyright © 2013 by the American College of Veterinary Internal Medicine