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  • Title: Correlation of electroretinography b-wave absolute latency, plasma levels of human basic fibroblast growth factor, vascular endothelial growth factor, soluble fatty acid synthase, and adrenomedullin in diabetic retinopathy.
    Author: Zakareia FA, Alderees AA, Al Regaiy KA, Alrouq FA.
    Journal: J Diabetes Complications; 2010; 24(3):179-85. PubMed ID: 19216096.
    Abstract:
    BACKGROUND: We investigated the b-wave latency of electroretinogram (ERG), human basic fibroblast growth factor (b-FGF), vascular endothelial growth factor (VEGF), soluble fatty acid synthase (s-Fas), and adrenomedullin (ADM) in diabetic retinopathy. PATIENTS AND METHODS: Thirty control and 60 type II diabetic women (mean age 45+/-3.9 years, duration of diabetes 10.1+/-2.1 years) were investigated. Diabetics without complications (Group II) and with retinopathy (Group III) were diagnosed depending on clinical findings, abnormal fundus examination, and ERG. Plasma levels of b-FGF, VEGF, s-Fas, and ADM were measured. RESULTS: ERG showed a significant increase of b-wave absolute latency, plasma b-FGF, VEGF, s-Fas, and ADM in diabetic retinopathy (P<.05). A positive correlation was found between b-wave latency and VEGF and s-Fas, and a negative correlation with b-FGF and ADM. CONCLUSION: This study elucidates the causative role of VEGF and s-Fas in diabetic retinopathy. VEGF may potently promote growth of endothelial cells and formation of new vessels implicated in proliferative retinopathy. s-Fas could be involved in advancement of apoptotic changes in retinopathy and high levels of b-FGF, and ADM may be compensatorily neuroprotective and vasculoprotective. The results showed that diabetic retinopathy is the result of multiple factors, so it is optimistic to believe that reversing VEGF or s-Fas will halt retinopathy, targeting multiple mechanisms simultaneously by administering combination treatments of VEGF antagonists; antiapoptotic drugs together with b-FGF and/or ADM may be prospective.
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