Fig. 4

EV-based treatment affected BC cell proliferation. A MDA-MB-231, B MDA-MB-453, C MCF-7, and D HCC1937 cells were treated with different types of enriched EVs for 24 h, and the effects on cell proliferation were assessed by MTT assay. Results are representative of one of two experiments. The graphics represent the average value of five replicates for each condition; the bars represent SD. Unpaired t-test was used; *p < 0.05, **p < 0.01 (n = 53)