In the DEX, miR‐140‐5p mimic, DEX + NC and DEX + miR‐140‐5p inhibitor + si‐Wnt1 groups, cerebral infarction volume was smaller than that in the model group, but still larger than that in the DEX + si‐Wnt1, DEX + miR‐140‐5p mimic groups (all P < .05). The gene discussed is WNT1; the disease is brain infarction.