Pathogen-free BALB/c-nu thymus-free nude mice (4–5 weeks old, male) were used, with two groups of five mice each (groups lv-miR-1307-5p and lv-miR-1307-5p inhibitor, each compared with lv-NC in the same animal). The overexpression stable strain and negative control stable strain cells were separately inoculated subcutaneously to the left and right sides of one group of mice (5 × 106 = number of cells injected per nude mouse), and the inhibition stable strain and negative control stable strain cells were separately inoculated subcutaneously to the left and right sides of the other group of mice (5 × 106 = number of cells injected per nude mouse). Eight days later, tumors were established. Tumor size and body mass were measured every five days. The volume was calculated as (length × width × width)/2, and the tumor tissue was collected for analysis.
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