HSPA5 and necrotizing enterocolitis: The gray value analysis of GRP78 showed that the GRP78 protein expressions in the NEC group at 24 h, 48 h, and 72 h of NEC modeling were greater than those in the control group by 22.95%, 45.26%, and 38.62%, respectively (P < 0.05 at all 3 time-points) (Table 6).