Objective:To investigate the protective mechanism of cerium oxide nanoparticles(CeO2 NPs)against acute pancreatitis(AP),with a focus on their antioxidant and anti-inflammatory properties.Methods:CeO2 NPs were characterized by transmission elec-tron microscopy(TEM)and dynamic light scattering.In in vitro experiments,cell counting Kit-8(CCK-8)assay,flow cytometry,and Western blotting were used to validate the role of CeO2 NPs in preventing the apoptosis of pancreatic acinar cells.In in vivo experi-ments,C57BL/6 mice were divided into control group,AP group,AP+CeO2 group,SAP group,and SAP+CeO2 group to investigate the mechanism of action of CeO2 NPs in alleviating inflammation and oxidative stress in AP mice.Results:CeO2 NPs demonstrated rela-tively good stability and biocompatibility,with a particle size of(50±4)nm on TEM.In vitro experiments showed that CeO2 NPs sig-nificantly reduced the apoptosis of pancreatic acinar cells by alleviating lipid peroxidation and maintaining mitochondrial membrane potential.In vivo experiments showed that CeO2 NPs could reduce the serum levels of amylase,lipase,and inflammatory cytokines(in-terleukin-6 and tumor necrosis factor-α).This result might be related to the regulation of the IKK/P53/Bcl-2 pathway.CeO2 NPs re-duced the production of reactive oxygen species and enhanced anti-oxidant response by regulating the Nrf-2 signaling pathway.Con-clusion:CeO2 NPs exert anti-inflammatory and antioxidant effects by regulating the IκB kinase/tumor protein p53/B-cell lymphoma 2(IKK/P53/bcl-2)and nuclear factor erythroid 2-related(Nrf-2)signaling pathways,thereby showing promising potential for the treatment of AP.

In order to improve the disaster response ability of resident physicians under standardized training, this study designed a disaster medicine curriculum of traditional Chinese and Western medicine with reference to domestic and foreign experience. The curriculum consisted of 8 modules with a total of 26 class hours. The definition and classification of disasters and the status of traditional Chinese medicine in disaster medicine were introduced. This study evaluated the teaching effect of disaster medicine curriculum of traditional Chinese and Western medicine carried out by the Emergency Trauma Center of the Seventh People's Hospital Affiliated to Shanghai University of Traditional Chinese Medicine in 84 resident physicians under standardized training. The results showed that the objective test scores of resident physicians under standardized training before and after the course were (45.00±2.51) and (76.25±2.76), respectively ( P<0.001). A questionnaire survey on the subjective understanding of knowledge related to disaster medicine of traditional Chinese and Western medicine was conducted among resident physicians under standardized training before and after the course. The results showed that the test scores before and after the course were (50.88±1.41) and (64.64±1.80), respectively ( P<0.001). This study showed that the theoretical knowledge, skills, and comprehensive ability of resident physicians under standardized training in disaster relief have been greatly improved through the disaster medicine-related curriculum, providing a reference for the establishment of disaster medical education-related curriculum of integrated traditional Chinese and Western medicine.