HOTAIR and ovarian cancer: LncRNAs could negatively regulate miRNAs by serving as ceRNAs of miRNAs.27 In addition, there are evidences showing that HOTAIR could bind to miR‐217 in renal cell carcinoma.28 Moreover, existing research has shown that HOTAIR regulates Rab22a expression in ovarian cancer through competitively sponging miR‐37.29