CREB1 and cardiac hypertrophy: Interestingly, we found that HIPK1+/− mice were also resistant to pathological cardiac hypertrophy and cardiac dysfunction accompanied with an inhibition of the CREB‐C/EBPβ axis (Figures S13–S15, Table S5, Supporting Information), supporting that reducing HIPK1, instead of completely suppressing it, was already sufficient to prevent pathological cardiac hypertrophy and cardiac dysfunction.