An increased osteoprotegerin serum release characterizes the early onset of diabetes mellitus and may contribute to endothelial cell dysfunction

Paola Secchiero, Federica Corallini, Assunta Pandolfi, Agostino Consoli, Riccardo Candido, Bruno Fabris, Claudio Celeghini, Silvano Capitani, Giorgio Zauli

Research output: Contribution to journalArticle

Abstract

Serum osteoprotegerin (OPG) is significantly increased in diabetic patients, prompting expanded investigation of the correlation between OPG production/release and glycemic levels. Serum levels of OPG, but not of its cognate ligand receptor activator of nuclear factor-κB ligand (RANKL), were significantly increased in type 2 diabetes mellitus patients compared with healthy blood donors. Serum OPG was also significantly elevated in a subgroup of recently diagnosed diabetic patients (within 2 years). The relationship between serum OPG and diabetes mellitus onset was next investigated in apoE-null and littermate mice. Serum OPG increased early after diabetes induction in both mouse strains and showed a positive correlation with blood glucose levels and an inverse correlation with the levels of free (OPG-unbound) RANKL. The in vitro addition of tumor necrosis factor-α to human vascular endothelial cells, but not human peripheral blood mononuclear cells, markedly enhanced OPG release in culture. In contrast, high glucose concentrations did not modulate OPG release when used alone or in association with tumor necrosis factor-α. Moreover, the ability of soluble RANKL to activate the extracellular signal-regulated kinase/mitogen-activated protein kinase and endothelial nitric-oxide synthase pathways in endothelial cells was neutralized by preincubation with recombinant OPG. Altogether, these findings suggest that increased OPG production represents an early event in the natural history of diabetes mellitus, possibly contributing to disease-associated endothelial cell dysfunction.

Original languageEnglish
Pages (from-to)2236-2244
Number of pages9
JournalAmerican Journal of Pathology
Volume169
Issue number6
DOIs
Publication statusPublished - Dec 2006

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Fingerprint Dive into the research topics of 'An increased osteoprotegerin serum release characterizes the early onset of diabetes mellitus and may contribute to endothelial cell dysfunction'. Together they form a unique fingerprint.

  • Cite this

    Secchiero, P., Corallini, F., Pandolfi, A., Consoli, A., Candido, R., Fabris, B., Celeghini, C., Capitani, S., & Zauli, G. (2006). An increased osteoprotegerin serum release characterizes the early onset of diabetes mellitus and may contribute to endothelial cell dysfunction. American Journal of Pathology, 169(6), 2236-2244. https://doi.org/10.2353/ajpath.2006.060398