Intestinal tract and parenteral multi-organ sequential pathological injury caused by necrotizing enterocolitis
Abstract Background: To explore the relationship between the pathological changes of colon, terminal ileum, lung, liver and kidney, and the changes of Bax, PCNA and PAF in a rat model of NEC.Methods: 140 neonatal SD rats were randomly divided into 2 groups. NEC rat model is the experimental group. From the 1st day to the 7th day,10 rats were sampled in each group for pathological examination of colon, terminal ileum, lung, liver and kidney tissue. The levels of Bax, PCNA and PAF were investigated by immunohistochemistry.Results: On the 1st day, the colon, terminal ileum, lung, liver and kidney showed inflammatory damage. On the 5th day, inflammatory injury was decreased. The inflammatory injury was nearly gone by the 7th day. There were differences in the time of apoptosis in intestine. In the intestine, the proliferation of weak to strong. Bax in liver and kidney showed marked apoptosis and apoptosis time increased in lung. PCNA was elevated in lung, liver and kidney, and the expression of PAF in lung and liver was increased.Conclusions: NEC can lead to secondary injury of different degrees in colon, terminal ileum, lung, liver and kidney, and the degree and time of injury and repair were different. In general, organ repair played a leading role on the 4th day after modeling.