As a result, the transcript half-life of circFNDC3B exceeded 24 h, whereas the transcript half-life of linear FNDC3B was approximately 4 h in both T24 and UM-UC-3 cells (Fig. 1h), indicating that circFNDC3B is more highly stable than linear FNDC3B in BC cells. This evidence concerns the gene FNDC3B and breast cancer.