TNF and viral myocarditis: Subsequently, we analyzed the capacity of overexpressed miR‐425‐3p on myocardial inflammation in viral myocarditis mice by ELISA, and the results exhibited that the myocardial inflammatory factors TNF‐α, IL‐6, and IL‐12 in CVB3 mice increased significantly, but overexpressed miR‐425‐3p degraded the expression of these myocardial inflammatory factors in CVB3 mice (Figure 4A–C, all p < .01).