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The aim of this paper was to determine if growth factors, known to be upregulated in proliferative diabetic retinopathy, exerted combined effects on retinal endothelial cells. The authors explored the individual and collective actions of insulin-like growth factor I (IGF-I), vascular endothelial growth factor (VEGF), platelet-derived growth factor-BB (PDGF-BB), fibroblast growth factor-2 (FGF-2) and...
The current understanding of the cellular signal transduction system is that cells initially respond to outside stimuli, such as growth factors or neurotransmitters, through ligand binding to the respective growth factor receptors or the G-protein-coupled receptors, to initiate transduction of the stimulus. This is followed by a series of association–dissociation and phosphorylation–dephosphorylation...
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