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    High-mobility group box-1 and biomarkers of inflammation in the vitreous from patients with proliferative diabetic retinopathy

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    Authors
    El-Asrar, Ahmed M. Abu
    Nawaz, Mohd Imtiaz
    Kangave, Dustan
    Geboes, Karel
    Ola, Mohammad Shamsul
    Ahmad, Saif
    Al-Shabrawey, Mohamed
    Issue Date
    2011-07-06
    URI
    http://hdl.handle.net/10675.2/749
    
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    Abstract
    Purpose: To measure levels of high-mobility group box −1 (HMGB1) and soluble receptor for advanced glycation end products (sRAGE) in the vitreous fluid from patients with proliferative diabetic retinopathy (PDR) and to correlate their levels with clinical disease activity and the levels of the inflammatory biomarkers monocyte chemoattractant protein-1 (MCP-1), soluble intercellular adhesion molecule-1 (sICAM-1), interleukin-1β (IL-1β), and granulocyte macrophage colony-stimulating factor (GM-CSF). In addition, we examined the expression of HMGB1 in the retinas of diabetic mice.
    Methods: Vitreous samples from 29 PDR and 17 nondiabetic patients were studied by enzyme-linked immunosorbent assay. Retinas of mice were examined by immunofluorescence analysis and western blotting.
    Results: HMGB1 was detected in all vitreous samples and sRAGE was detected in 5 PDR samples. IL-1β was detected in 3PDR samples and GM-CSF was not detected. Mean HMGB1 levels in PDR with active neovascularization were twofold and threefold higher than that in inactive PDR and nondiabetic patients, respectively. Mean HMGB1 levels in PDR patients with hemorrhage were significantly higher than those in PDR patients without hemorrhage and nondiabetic patients (p=0.0111). There were significant correlations between levels of HMGB1 and levels of MCP-1 (r=0.333, p=0.025) and sICAM-1 (r=0.548, p<0.001). HMGB1 expression was also upregulated in the retinas of diabetic mice.
    Conclusions: Subclinical chronic inflammation might contribute to the progression of PDR.
    Citation
    Mol Vis. 2011 Jul 6; 17:1829-1838
    Collections
    Department of Oral Biology & Diagnostic Sciences: Faculty Research and Publications

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