Fig. 4: MiR-30b targets KRAS to suppress the expression of KRAS and inhibits cellular progressions in CRC.

a Incubated whole-cell lysates of HCT8 and CACO2 cells with biotinylated probes specific to KRAS or NC, then RT-qPCR was executed to detect the enrichment of endogenous cir_IFNGR2 and KRAS. The results were expressed as the percentage of pull-down to the input. b Anti-Ago2 were immunoprecipitated with the complex containing miR-30b and KRAS in HCT8 (left) and CACO2 (right) cells using RIP, and then subjected to RT-qPCR analysis to detect the enrichment of miR-30b and KRAS. All tests were performed in triplicate. c Western blotting was performed to determine the protein expression of KRAS in the indicated cells (left). d CCK8 assay revealed the cell growth ability of the indicated cells e Representative image of colony formation assay in HCT8 and CACO2 cells(left), Statistical analysis of results(right). f Representative image of transwell chamber experiment in HCT8 and CACO2 cells (left), Statistical analysis of result s(right). The error bars represent the means ± SDs from three independent experiments. *p < 0.05, **p < 0.01, ***p < 0.005.