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SiO2NPs block Wnt-regulated metastasis of cancer cells. (A and B) The effect of SiO2NPs on metastasis of MDA-MB-231 breast cancer cells in the absence (A) or presence (B) of Wnt3a. Images were recorded at the time of wounding (0 h) and 48 h after wounding. (C) Quantification of the effect of SiO2NPs on MDA-MB-231 cell migration in the absence or presence of Wnt3a. Data represented as mean ± s.d. (n=3). Student's t-test, ns not significant; *** p<0.001.
