Figure 5From: Upregulated hypoxia inducible factor-1α and -2α pathway in rheumatoid arthritis and osteoarthritisSchematic representation of the suggested pathogenetic model in OA and RA. HIF, hypoxia inducible factor; TP, thymidine phosphorylase (referred to in the text as platelet-derived endothelial cell growth factor [PD-ECGF]); VEGF, vascular endothelial growth factor.Back to article page