Serum interleukin-17 and its relationship to angiogenic factors in multiple myeloma

Abstract Background Interleukin-17 (IL-17) is a CD4 T-cell-derived mediator of angiogenesis that stimulates vascular endothelial cell migration and regulates the production of a variety of proangiogenic factors, such as tumor necrosis factor-α (TNF-α) and vascular endothelial cell growth factor (VEGF). Angiogenesis is implicated in the progression of multiple myeloma (MM). Methods We measured serum levels of IL-17, TNF-α, and VEGF, as well as microvessel density (MVD) in 40 untreated MM patients. Results Levels of IL-17 in the sera of patients with MM were higher than those in matched controls; however, the difference did not reach statistical significance. Serum levels of both TNF-α and VEGF in MM patients were significantly higher than those in controls ( p p  = 0.001 and p p p p r  = 0.552; p r  = 0.385, p  = 0.014). In addition, a positive correlation was found between serum values of VEGF and TNF-α ( r  = 0.657, p r  = 0.353, p  = 0.026), and between MVD and TNF-α ( r  = 0.506, p  = 0.001) in MM patients. Conclusion These results suggest that IL-17 plays a role in the promotion of angiogenesis and associated disease progression in MM.