Expression and clinical significances of NLRP3 inflammasomes and oxidative stress in placenta of patient with neonatal hypoxic-ischemic encephalopathy
WEI Tingyan1,2 YANG Jie3 ZENG Yuting4 HUANG Qiting4 LIU Yujun4
1.Graduate School of Guangzhou Medical University, Guangdong Province, Guangzhou 510182, China;
2.Department of Neonatology, Longhua District People′s Hospital of Shenzhen City, Guangdong Province, Shenzhen 518109, China;
3.Department of Neonatology, Guangdong Women and Children Hospital, Guangdong Province, Guangzhou 510000, China;
4.Department of Pathology, Zengcheng District People′s Hospital of Guangzhou, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangdong Province, Guangzhou 511300, China
Abstract:Objective To investigate the expression and oxidative stress of NLRP3 inflammasomes in the placenta of neonates with hypoxic-ischemic encephalopathy (HIE), and to investigate the clinical significance of NLRP3 inflammasome and oxidative stress in HIE. Methods From July 2010 to May 2019, 30 cases of HIE placental tissue (HIE group) and 30 cases of normal placental tissue (normal group) were selected from Zengcheng District People′s Hospital, Guangzhou, NLRP3 expression was detected by immunohistochemistry. The concentrations of malondialdehyde (MDA) and superoxide dismutase (SOD) were measured in 10 fresh placental tissues, placental tissues of the two groups were pathologically evaluated. Results The number of villi with cytosygotrophoblast nodules and cytotrophoblast cells in the placenta tissues of neonates in HIE group was higher than that of normal group (P < 0.05). The number of villi with cytosomal membrane was less than that of normal group (P < 0.05). The expression level of NLRP3 in HIE group neonatal placenta was significantly higher than that in normal group, and the difference was statistically significant (P < 0.05). SOD activity in HIE group was lower than that in normal group (P < 0.05), and MDA content was higher than normal group (P < 0.05). NLRP3 was negatively correlated with SOD activity (r = -0.63, P = 0.00), while positively correlated with MDA content (r = 0.74, P = 0.00). Conclusion There is a significant increase in the expression of NLRP3 inflammasomes in the placenta of neonates with HIE and abnormal oxidative stress, both of which are correlated, which may be the cause of neonatal HIE.