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Artemin expression in chondrosarcoma and its effect on proliferation and migra‐tion of endothelial cells
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Abstract:
Objective: To investigate the expression of Artemin in chondrosarcoma and its effect on proliferation and migration of endothelial cells, and to explore the mechanism. Methods: A total of 40 chondrosarcoma tissue samples (low degree (Ⅰ), 20 cases; high degree (Ⅱ,Ⅲ), 20 cases) surgically resected from patients, who were treated in Lianyungang Hospital Affiliated to Nanjing University of Chinese Medicine from May, 2015 to April, 2019, were collected for this study. Another 20 cases of normal cartilage tissue specimen from patients with amputations due to car accidents were served as control. The expressions of Artemin, vascular endothelial growth factor (VEGF), Ki-67 and CD31+ vascular density in tumor tissues were detected by immunohistochemistry. After being treated with 10 ng/ml Artemin, the changes of VEGF, stromal cell derived factor-1 (SDF-1), matric metalloproteinase 2 (MMP2) and MMP9 in the su‐pernatant of SW1353 cell culture were detected by enzyme-linked immunosorbent assay (ELISA), and the effects of Artemin-treated chondrosarcoma cells on the migration and proliferation of ECV304 cells were detected by Transwell migration assay and MTT cell proliferation assay, respectively. Results: The expressions of Artemin and Ki-67 in the tissues of low-level group were significantly higher than those in the control group (all P<0.01); the expressions of Artemin and Ki-67 in the tissues of high-level group were signifi‐cantly higher than those in the low-level group (all P<0.01). The expression of Artemin was positively correlated with VEGF level and vascular density in chondrosarcoma tissues (all P<0.01); Artemin promoted the secretion of VEGF by chondrosarcoma cells, but had no significant effect on the secretion of SDF-1, MMP2 and MMP9. Artemin induced the proliferation and migration of ECV304 cells by promoting the secretion of VEGF by chondrosarcoma cells (all P<0.01). Conclusion: Artemin is highly expressed in chondrosarcoma tissues and has a positive correlation with the expression of VEGF and vascular density. Artemin can enhance the angiogenesis induced by chondrosarcoma.
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