SFXN1 and breast cancer: As shown in Figure 5a, four negative regulatory miRNA–SFXN1 pairs were significantly related to poor prognosis for BC patients, namely, has-miR-22-3p (HR = 1.88, P = 0.00015) [28], has-miR-140-5p (HR = 1.40, P = 0.041), has-miR-532-5p (HR = 1.39, P = 0.044), and has-miR-582-3p (HR = 1.38, P = 0.049).