Tumor Necrosis Factor-Alpha and 8-Hydroxy-2'-Deoxyguanosine are Associated with Elevated Urinary Angiopoietin-2 Level in Type 2 Diabetic Patients with Albuminuria.

Abstract:

BACKGROUND/AIMS:We previously showed that urine and serum Angiopoietin-2 (Ang-2) levels increased significantly with the degree of albuminuria in diabetes patients, but the reasons remain unclear. Consequently we aimed to determine whether there was an association between Ang-2, inflammatory cytokines (TNF-α and IL-18) and reactive oxygen species (8-OHdG and SOD) in type 2 diabetes patients with albuminuria. METHODS:This retrospective study evaluated 113 patients with type 2 diabetes and normoalbuminuria, microalbuminuria, or macroalbuminuria and 30 healthy controls. Serum and urine TNF-α, IL-18 and 8-OHdG levels were measured by ELISA. Superoxide dismutase (SOD) activity was determined by spectrophotometry. RESULTS:Serum and urine TNF-α, IL-18 and 8-OHdG levels increased significantly with the degree of albuminuria, and were positively correlated with increased Ang-2. In contrast, SOD activity decreased with the degree of albuminuria and was negatively correlated with Ang-2. Multivariable linear regression analysis revealed that serum Ang-2 level was independently associated with serum levels of TNF-α (P<0.001), 8-OHdG (P=0.001), and IL-18 (P=0.003). Urinary Ang-2 level was independently associated with urinary TNF-α (P<0.001) and 8-OHdG (P=0.004) levels. CONCLUSION:TNF-α and 8-OHdG are associated with elevated urinary Angiopoietin-2 levels in type 2 diabetic patients with albuminuria.

journal_name

Kidney Blood Press Res

authors

He FF,Li HQ,Huang QX,Wang QY,Jiang HJ,Chen S,Su H,Zhang C,Wang YM

doi

10.1159/000368510

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

355-65

issue

4

eissn

1420-4096

issn

1423-0143

pii

000368510

journal_volume

40

pub_type

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