ATM and breast cancer: For example, miR‐18a‐5p enhanced radiosensitivity via downregulating ATM in cervical cancer,52 colorectal cancer,53 and breast cancer.54 It was addressed that miR‐18 targeted heat shock transcription factor 2 (HSF2),55 while HSF2 upregulated HIF‐1α.56 Additionally, other studies showed that several miRNAs were associated with DNA repair.