Similarly, compared with the DM or NEC group, the expression of PCNA, β‐catenin, p‐GSK3β (Ser 9), p‐AKT (Ser 473), AKT and cyclin D1 decreased in the NEC‐L and NEC‐H groups (Figures 6E and S9A–H). Here, CCND1 is linked to necrotizing enterocolitis.