Abstract
Purpose: To investigate the effect of curcumin on tumor growth and angiogenesis of human gliomas and identify the underlying molecular mechanisms.
Methods: A mouse xenograft glioma model was established by subcutaneously inoculating tumor cell aggregates derived from the U87 cell line. Mice were treated with 0.01ml/g body weight of curcumin or saline. Tumor volume was measured. Microvessel density was assessed by CD34 immunostaining, and angiogenesis by immunohistochemical staining of vascular endothelial growth factor (VEGF), angiopoietin-2 (Ang-2) and thrombospondin 1 (TSP-1).
Results: At 28 days after treatment, tumor weights in the curcumin-treated group were much smaller than in the control group (0.23±0.11g vs 0.44±0.15g，p＜0.05), resulting in a 45.8% inhibition of tumor growth. Curcumin also markedly inhibited microvessel density. Expression of VEGF and Ang-2 was inhibited by curcumin, whereas TSP-1 expression was up-regulated.
Conclusion: This study shows that curcumin inhibits tumor growth by inhibiting VEGF/Ang-2/TSP-1- mediated angiogenesis in a xenograft glioma mouse model.
Keywords: Curcumin, glioma, angiogenesis, vascular endothelial growth factor.Curcumin, glioma, angiogenesis, vascular endothelial growth factor.
Graphical Abstract
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