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Perturbations of the anti-ageing hormone Klotho in patients with type 1 diabetes and microalbuminuria

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to) 911–914
Number of pages4
JournalDiabetologia
Volume60
Issue number5
Early online date13 Feb 2017
DOIs
Publication statusE-pub ahead of print - 13 Feb 2017

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Abstract

Aims/hypothesis: Patients with type 1 diabetes and microalbuminuria are at high risk of cardiovascular disease (CVD) and end-stage renal disease. Soluble Klotho is an anti-ageing circulating hormone involved in phosphate metabolism and vascular homeostasis through protective effects on the endothelium and antioxidant actions. The role of soluble Klotho in patients with type 1 diabetes and microalbuminuria is unknown. 
Methods: In a cross-sectional single-centre study we evaluated the levels of circulating serum soluble Klotho in 33 participants with type 1 diabetes and a history of microalbuminuria (receiving renin–angiotensin system [RAS] inhibitors) and 45 participants with type 1 diabetes without a history of microalbuminuria (not receiving RAS or other antihypertensive drugs). All participants had an eGFR >45 ml/min, duration of diabetes >20 years and no history of CVD. Serum soluble Klotho levels were measured by a validated immunoassay. 
Results: Participants with microalbuminuria had significantly lower levels of serum Klotho compared with those without microalbuminuria (median [interquartile range], 659.3 [525.3, 827.6] vs 787.7 [629.5, 1007]; p = 0.023). This difference persisted after adjustment for variables including age and eGFR. In a subgroup of 30 individuals with and without microalbuminuria, other markers of phosphate balance were not significantly different. 
Conclusions/interpretation: In individuals with type 1 diabetes, microalbuminuria is associated with soluble Klotho deficiency. Further studies are required to determine whether soluble Klotho is causally related to the development of cardio-renal disease in type 1 diabetes.

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