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The reproduction rate of Sca-1+ CSCs in vitro after transfection by the methyl thiazolylte-trazolium (MTT) assay in blank, negative control, miRNA-21 mimic, and miRNA-21 inhibitor groups at different time points. The proliferation of Sca-1+ CSCs was significantly enhanced in the miRNA-21 mimic group but was inhibited in the miRNA-21 inhibitor group compared to the blank group.
