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Reduction in expression of leukemia cell proliferation marker CD71 in NK3.3 EV treated cells. (A) K562 and (B) Jurkat cells were treated with either PBS, 25 μg/ml HEK293 EVs, 25 or 100 μg/ml NK3.3 EVs, stained for proliferation marker CD71, and analyzed by flow cytometry. MFI: mean fluorescence intensity. Mean MFI ± SE; n = 3. p-Values determined by comparison of NK3.3 EV-treated cells to HEK293 EV-treated cells. ∗p ≤ 0.05, ∗∗p ≤ 0.005.
