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Abstract
The objective of this study was to determine the serum concentration of angiogenic factors (vascular endothelial growth factor, VEGF; transforming growth factor beta, TGF-β1; hepatic growth factor, HGF; basic fibroblast growth factor, bFGF; tumor necrosis factor alpha, TNF-α; soluble vascular endothelial growth factor receptor 1, sVEGF-R1; soluble vascular endothelial growth factor receptor 2, sVEGF-R2), the relationships among them and to assess the relation of their levels with the applied therapy in 48 females with systemic lupus erythematosus (SLE; 37 long-term treated +11 newly diagnosed). The control group consisted of 24 healthy women. A statistically significant increase of sVEGF-R2 and significant decrease of sVEGF-R1 were observed in the subgroup of newly diagnosed SLE patients as compared to the control subjects. No significant differences were found between serum angiogenic factors in the long-term treated subgroup and the control, the long-term treated subgroup and the newly diagnosed SLE patients after a 3-month treatment, and the subgroup of newly diagnosed SLE patients before therapy and after a 3-month treatment. The significant decrease in the serum of sVEGF-R2 was revealed in the subgroup treated for a long-time as compared to the subgroup of newly diagnosed untreated SLE patients. The analysis of relationships between serum concentration of sVEGF-R1 and other cytokines levels revealed positive correlation with concentration of VEGF and TNF-α in the total group of patients. In the newly diagnosed untreated subgroup, a strong positive correlation between concentration of sVEGF-R1 and bFGF was observed. Furthermore, a moderate positive correlation between concentration of sVEGF-R1 and the level of VEGF was revealed in the long-term treated patients. The association between sVEGF-R2 and HGF was also noted in this subgroup. The obtained data suggest the necessity of further investigations to determine the importance of angiogenic factors in pathogenesis and therapy of SLE.