The Editor-in-Chief has retracted this article. After publication, concerns were raised regarding similarities in cell and tissue images. Specifically:

• Fig. 3e MDA-MB-231 circAGFG1 and Fig. 8a MDA-MB-231 circAGFG1 + miR-195-5p images appear to contain overlap
• Various panels appear to overlap in Figs. 4c and 8b, with different rotation and brightness/contrast of the images.
• In Fig. 5 g, the mock group images representing CCNE1 and pRB appear highly similar,

Additionally, the authors could not provide ethics approval numbers for the human and animal parts of the study upon request. The Editor-in-Chief therefore no longer has confidence in the presented data.