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eISSN: 1643-3750

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The Low Expression of IL-37 Involved in Multiple Myeloma – Associated Angiogenesis

Zun-chang Li, Ming-dong Sun, Yong-qing Zheng, Hong-jie Fu

(Department of Hemotology, Provincial Hospital, Shandong University, Jinan, Shandong, China (mainland))

Med Sci Monit 2016; 22:4164-4168

DOI: 10.12659/MSM.897451


BACKGROUND: Angiogenesis plays a significant role in complex inflammatory and angiogenic processes and is also involved in multiple myeloma (MM) pathogenesis. IL-37 is a proinflammatory cytokine in antitumor activity. Our purpose was to evaluate the IL-37 clinical significance on MM.
MATERIAL AND METHODS: We measured serum levels of IL-37 in 45 patients with different stages of MM and 30 healthy control subjects and correlated IL-37 with numerous cytokines, such as angiogenesis factors including vascular endothelial growth factor (VEGF) and angiotensin-2 (Ang-2). We also measured the tube formation of human umbilical vein endothelial cells (HUVECs) after pretreatment with recombinant human IL-37 (rhIL-37).
RESULTS: Serum IL-37 level was lower in the patients with MM than in the healthy control subjects, whereas VEGF and Ang-2 levels were higher, depending on International Staging System stage. Serum IL-37 level had a negative correlation to VEGF and Ang-2 levels, and VEGF had a positive correlation to Ang-2 level. The tube formation of HUVECs was suppressed by the rhIL-37 pretreatment.
CONCLUSIONS: Our results indicate that serum level of IL-37 plays a part in the pathophysiology of MM progression. Therefore, IL-37 serum level may be a biomarker for disease stage and angiogenesis processes.

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