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Exp Clin Endocrinol Diabetes 2015; 123(02): 106-111
DOI: 10.1055/s-0034-1390447
Article
© Georg Thieme Verlag KG Stuttgart · New York

The Plasma Osteoprotegerin Level and Osteoprotegerin Expression in Renal Biopsy Tissue are Increased in Type 2 Diabetes with Nephropathy

S.-T Wang   *
1   Department of Endocrinology, Affiliated Yidu Central Hospital of Weifang Medical College, Weifang, China
,
C.-Y. Zhang   *
1   Department of Endocrinology, Affiliated Yidu Central Hospital of Weifang Medical College, Weifang, China
,
C.-M. Zhang
1   Department of Endocrinology, Affiliated Yidu Central Hospital of Weifang Medical College, Weifang, China
,
W. Rong
1   Department of Endocrinology, Affiliated Yidu Central Hospital of Weifang Medical College, Weifang, China
› Institutsangaben
Weitere Informationen

Publikationsverlauf

received 03. April 2014
first decision 26. August 2014

accepted 15. September 2014

Publikationsdatum:
12. Dezember 2014 (online)

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Abstract

Objective: To investigate the plasma osteoprotegerin level and osteoprotegerin expression in renal biopsy tissue in type 2 diabetes with nephropathy.

Methods: Plasma osteoprotegerin level was measured by enzyme-linked immunoassay in 48 type 2 diabetes with normoalbuminuria, 48 patients with microalbuminuria, 44 patients with macroalbuminuria and 40 healthy persons. Part of diabetes patients with nephropathy were performed kidney biopsy by ultrasound guide. The osteoprotegerin expression in kidney biopsy tissue is examined by immunohistochemistry.

Results: The plasma osteoprotegerin levels were significantly elevated in patients with microalbuminuria (3.73±0.75 ng/l) and macroalbuminuria (4.68±0.82 ng/l) as compared with patients with normoalbuminuria (2.71±0.69 ng/l) and control subjects (2.11±0.42 ng/l). And the plasma osteoprotegerin level in macroalbuminuric group was also higher than that in microalbuminuria group. The plasma osteoprotegerin level had a positive correlation with the fasting plasma glucose (FPG), 2-h plasma glucose (2hPG), glycohemoglobinA1c (HbA1C), high sensitive C-reactive protein (hsCRP) and log(UAER). Multivariate regression analysis revealed that plasma osteoprotegerin level was an independent factor associated with albuminuria in type 2 diabetes. The immunohistochemistry results showed that positive immunostaining for osteoprotegerin was observed in the renal tubule cells of biopsy and not in glomerulus, and the osteoprotegerin expression was higher in macroalbuminuria group than that in microalbuminuria group.

Conclusions: The plasma osteoprotegerin level and the osteoprotegerin expression in renal tubule cells of biopsy tissue were increased in nephropathy of type 2 diabetes. This finding supports the growing concept that osteoprotegerin may act as an important regulatory molecule in the angiopathy, and particularly, that it may be involved in the occurrence and development of nephropathy in type 2 diabetes.

Key words

Type 2 diabetes - osteoprotegerin - diabetic nephropathy

* These authors contributed equally to this study and share first authorship.


 

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