Human tumor and control tissue data: (A) Delta CT (∆CT) of HIF-1α expression in control tumor tissues, all tumor tissues, ER-positive/negative, PR-positive/negative, HER2-positive/negative, and triple-negative tumor samples. (B) HIF-1α expression in stage I, II, III, and IV tumors. (C) Correlation between HIF-1α and miR526b expression in tumor samples. (D) Correlation between HIF-1α and miR655 expression in tumor samples. In figures A and B, the Y-axis represents -∆CT, as smaller ∆CT values indicate higher expression. (E) Correlation between HIF-1α and miR526b cluster expression in tumor samples. (F) Correlation between HIF-1α and miR655 cluster expression in tumor samples. * p < 0.05, ** p < 0.01 and *** p < 0.001.