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Objective:To analyze and discuss the application value and teaching effect of simulate patients (SP)-assisted problem-based learning (PBL) combined with team-based learning (TBL) mode in pediatric first aid teaching, in order to provide a new reference for the reform of standardized residency training and teaching mode of pediatrics in the new era in China.Methods:A total of 103 residents who participated in the standardized training in the Department of Pediatrics of Hunan Children's Hospital from January 2018 to December 2020 were selected as the research objects, and they were divided into the control group (50 cases) and the experimental group (53 cases). The control group adopted the previous teaching mode of residents, while the experimental group adopted the SP-assisted PBL combined with TBL mode. In this study, SPSS 22.0 software was used for t test and chi-square test. Results:The examination scores of the experimental group in the theoretical knowledge of pediatric first aid, clinical thinking and skills, and application of pediatric first aid skills were higher than those in the control group [(86.98±3.42), (85.69±5.13), (89.62±4.75)] vs. [(77.23±4.16), (81.16±3.96), (76.54±5.78)], with statistically significant differences between the two groups ( P<0.05). The questionnaire survey showed that the clinical thinking and pediatric emergency skills, doctor-patient communication ability, teamwork ability and other aspects of the experimental group were significantly better than those of the control group ( P<0.05). Conclusion:The SP-assisted PBL combined with TBL mode can produce positive effects in the standardized residency training of pediatrics, which will help residents better master pediatric first aid skills, improve their clinical comprehensive capabilities, and be more conducive to improving the quality of pediatric residency training, which is worth promoting in the new era.
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Objective:To observe the therapeutic effect of echinacoside (ECH) on liver injury and glucose metabolism disorder in sepsis rats induced by cecal ligation and puncture (CLP), and to explore its possible mechanism.Methods:Forty eight male Sprague Dawley (SD) rats were randomly divided into four groups: sham group (sham), model group (CLP), treatment group (CLP+ ECH) and inhibitor group (CLP+ ECH+ EX527). The sham group only received laparotomy, and the model group underwent CLP. The treatment group was intragastric administration of echinacea (30 mg/kg) every day after CLP modeling. The inhibitor group was injected with silence information regulator 1 (SIRT1) inhibitor EX527 (5 mg/kg) one hour before CLP, and then treated the same as the treatment group. Fasting blood glucose, insulin and serum biochemical indexes were detected in virous groups. The serum levels of interleukin (IL)-1 β, IL-6 and tumor necrosis factor-α(TNF-α) were detected by enzyme-linked immunosorbent assay (ELISA). 2′, 7′- dichlorofluorescein diacetate (DCFH-DA) staining was used to observe the production of reactive oxygen species (ROS) in liver tissue of rats in each group; hematoxylin-eosin (HE) staining was used to observe the pathological changes of liver tissue in each group; The expressions of SIRT1, glucose-6-phosphatase (G6Pase), phosphoenolpyruvate carboxykinase (PEPCK), phosphorylated signal transducers and activators of transcription 3 (p-STAT3) and phosphorylated protein ki-nase B(p-AKT) were detected by Western blot.Results:Compared with sham group, the levels of serum glucose, serum insulin, alanine aminotransferase (ALT), aspartate aminotransferase (AST), ROS, IL-1β, IL-6 and TNF-α in model group increased, while the liver glycogen and survival rate decreased (all P<0.05). After echinacoside treatment, the serum glucose, serum insulin, ALT, AST, ROS , IL-1β, IL-6 and TNF-α levels decreased, and the liver glycogen and survival rate increased (all P<0.05); After SIRT1 inhibitor intervention, the levels of serum insulin, ALT, AST, IL-6 and ROS in the inhibitor group increased ( P<0.05). HE staining showed that there were infiltration and necrosis of inflammatory cells in the liver tissue of model group, and echinacoside could significantly reduce the focal and massive necrosis; Western blot showed that compared with the sham group, the expression levels of SIRT1, p-STAT3 and p-AKT protein in the model group decreased, while the expression levels of G6Pase and PEPCK protein increased ( P<0.05); After echinacoside treatment, the expression levels of SIRT1, p-STAT3 and p-AKT increased, while the expression levels of G6Pase and PEPCK decreased ( P<0.05). After SIRT1 inhibitor intervention, the expression of SIRT1, p-STAT3 and p-AKT protein decreased, and the expression of G6Pase and PEPCK protein increased in the inhibitor group ( P<0.05). Conclusions:Echinacoside is a potential therapeutic agent for sepsis associated liver injury and glucose metabolism disorders, which may play a role by targeting SIRT1 to activate STAT3 and AKT in the liver.
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Objective:To investigate whether miRNA-296-5p can inhibit enterovirus 71 (EV71) virus replication in neural cells SK-N-SH by targeting the phosphatase and tensin homology deleted on chromosome 10 (PTEN)/phosphatidylinositol 3-kinase (PI3K)/serine/threonine kinases (AKT) signaling pathway.Methods:Serum samples were collected from patients with EV71 virus-infected hand-foot-mouth disease and normal physical examination, and the expressions of serum inflammatory factors procalcitonin (PCT), C-reactive protein (CRP), tumor necrosis factor-α (TNF-α) , interleukin-6 (IL-6), IL-1β, and IL-13 were detected by enzymelinked immunosorbent assay (ELISA). Human neuroblastoma SK-N-SH cells infected by EV71 virus in logarithmic growth phase were set up as control group, miRNA-296-5p mimic group and miRNA-296-5p inhibitor group. The transfection was carried out according to the Lipofectamine 2000tm cell transfection reagent. The expression of EV71-VP1 gene mRNA and protein and PTEN/PI3K/Akt signal pathway related molecules in three groups of cells was observed by real-time fluorescent quantitative polymerase chain reaction (qRT-PCR) and Western blot.Results:ELISA test results showed that the levels of serum inflammatory factors PCT, CRP, TNF-α, IL-1β, IL-6 and IL-13 in patients with EV71 virus-infected hand, foot and mouth disease were significantly higher than those in normal physical examination ( P<0.05). The results of qRT-PCR and Western blot showed that the mRNA and protein levels of mirna-296-5p and PTEN in SK-N-SH were significantly decreased after EV71 virus infection, while the mRNA and protein levels of EV71-VP1 and molecules related to PI3K/AKT signaling pathway were significantly increased ( P<0.05). The expression of PTEN was significantly increased in the miRNA-296-5p mimic group, and the expression of EV71-VP1 and the activation of the PI3K/AKT signaling pathway were inhibited, while the effect was reversed in the miRNA-296-5p inhibitor group ( P<0.05). Conclusions:MiRNA-296-5p inhibits the replication of EV71 virus in neural cells SK-N-SH by targeting the PTEN/PI3K/AKT signaling pathway, while reducing the cellular inflammatory response, targeting miRNA-296-5p and downstream PTEN/PI3K/AKT The signal pathway is expected to provide therapeutic targets and theoretical basis for the treatment of hand-foot-mouth disease caused by clinical EV71 virus.
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Objective@#To analyze the clinical features of acute liver failure in critically ill children, to investigate the risk factors affecting the prognosis of acute liver failure in critically ill children, and to provide evidence for clinical diagnosis and prognosis.@*Methods@#The data of 85 children with acute liver failure who conformed to the diagnostic criteria from January 2011 to January 2017 at Hunan Children′s Hospital were analyzed.According to the prognosis of children with acute liver failure, all children were divided into the survival group (49 cases) and the death group (36 cases). Univariate and multivariate Logistic regression methods were used to analyze the risk factors affecting the prognosis of children with acute liver failure.@*Results@#There were statistically significant differences of enzyme bile isolation[26.5% (13/49 cases) vs.55.6%(20/36 cases), χ2=7.361, P=0.007], hepatic encephalopathy [16.3%(8/49 cases) vs.38.9%(14/36 cases), χ2=5.507, P=0.019], total bilirubin [72.30(3.93-428.80) μmol/L vs.153.08(3.23-776.26) μmol/L, U=-2.283, P=0.027], albumin [35.02(22.89-45.30) g/L vs.28.90(18.30-40.26) g/L, U=4.640, P=0.000], alanine aminotransferase [1 626.10(23.01-9 518.41) U/L vs.533.08(7.02-5 163.83) U/L, U=2.992, P=0.004], aspartate aminotransferase [1 611.20(34.51-15 850.02) U/L vs.715.54(60.06-10 280.42) U/L, U=2.312, P=0.023], blood ammonia [71.02(16.04-148.56) μmol/L vs.81.02(33.04-274.02) μmol/L, U=-2.057, P=0.046], prothrombin time [23.10(13.61-81.23) s vs.33.91(12.62-84.57) s, U=-2.364, P=0.022], activated partial prothrombin time [52.91(4.02-181.02) s vs.67.35(31.20-180.02) s, U=-2.226, P=0.029], and end-stage liver disease model score [13.00(-9.00-52.00) score vs.27.50(-9.00-88.00) score, U=-3.082, P=0.003] in the children with acute liver failure between the survival group and the death group.Multivariate Logistic regression analysis showed that total bilirubin (OR=0.236, 95%CI: 0.059-0.946, P=0.041), albumin(OR=0.854, 95%CI: 0.746-0.976, P=0.019), enzyme bile separation (OR=1.063, 95%CI: 1.031-1.119, P=0.005) and hepatic encephalopathy (OR=1.439, 95%CI: 1.021-2.043, P=0.017) were risk factors for the prognosis of children with acute liver failure.@*Conclusions@#The level of the total bilirubin and the ratio of enzyme bile isolation and hepatic encephalopathy are positively correlated but the level of albumin is negatively correlated with the prognosis of critically ill children with acute liver failure.