Objective To measure the lethal dosage values ( LD50 ) of i.v.asarone injection for mice and to establish a standard for abnormal toxicity test of asarone injection to potentially reduce the occurrence of adverse drug reaction.Methods To obtain the LD50 value, a weighted linear probit regression method ( Bliss method) is employed. The limit of abnormal toxicity test is determined according to Appendix XI C in its 2010 edition of the Chinese pharmacopoeia.Results It is found that the LD50 of intravenously asarone injection in mice ranges from 51.9 to 153.1 mg/kg.The abnormal toxicity test should be added as an additional item in the standard.Conclusions Based on analyses in this study, an appropriate limit of abnormal toxicity test is 15 mg/kg, which is also in line with current medical standard in China.

Objective To learn whether plasmodium genetic attenuated sporozoites (GAS) can induce immunity against lung cancer ,in order to provide new ideas for the study of lung cancer vaccine .Methods Ther study was divided into two groups respec‐tively ,experimental group received intravenous injection of genetically attenuated sporozoites to immunize C57BL/6J mice and con‐trol group injection of phosphate buffer solution (PBS);after 14 days ,we subcutaneously inoculated lewis lung cancer (LLC) cells , calipers was used to measure tumor size .Immunohistochemical staining was detected tumor proliferation ,apoptosis ,and angiogene‐sis .Results There was statistically significant in tumor size .Immunohistochemical staining revealed that attenuated sporozoites in‐fection inhibited LLC eslls proliferation ,angiogenesis ,apoptosis .Conclusion The malaria attenuated sporozoites may provide a no‐vel strategy or therapeutic vaccine vector for anti‐lung cancer immune‐based therapy .

Objective:To study the effects of different fluid balance strategies on severe pneumonia patients and explore the possible influence path in order to optimize fluid treatment for severe pneumonia patients.Methods:A total of 89 adult patients with severe pneumonia admitted to EICU and RICU of Jiangsu Provincial Hospital from January 2017 to August 2019 were retrospectively analyzed . The differences of clinical data between the death group ( n=35) and the survival group ( n=54) were analyzed. Multivariate logistic regression analysis was used to identify predictors of 30-day mortality after entering ICU of severe pneumonia patients. Patients were divided into a positive fluid balance (PFB) group ( n=48) and a negative fluid balance (NFB) group ( n=41). Kaplan-Meier survival curve was used to analyze the difference of 30-day survival rate between the PFB and NFB groups. Results:Age ( OR=1.060, 95% CI: 1.018-1.104, P=0.005), ventilator dependency ( OR=6.679, 95% CI: 1.218-36.620, P=0.029), vasoactive agents ( OR=21.068, 95% CI: 4.654-95.376, P<0.001), and new hyperchloremia occurred within 24 h after admission to the ICU ( OR=21.714, 95% CI: 1.059-445.008, P=0.046) were the risk factors for severe pneumonia patients' 30-day mortality after entering ICU. The concentrations of creatinine, urea nitrogen, sodium and chlorine of the NFB patients were lower than those of the PFB patients within 5 days after admission to ICU (day 1-day 5) ( P<0.05). The serum calcium concentrations of the NFB patients were higher than those of the PFB patients on day 3-5 ( P<0.05). The 30-day survival rate was significantly higher in the NFB patients than in the PFB patients ( P<0.001). Conclusions:The strategy of negative fluid balance can reduce serum chlorine concentration, improve renal function and reduce mortality in patients with severe pneumonia.

Objective:To explore the effect of pediatric critical illness score (PCIS), pediatric risk of mortality Ⅲ score (PRISM Ⅲ), pediatric logistic organ dysfunction 2 (PELOD-2), pediatric sequential organ failure assessment (p-SOFA) score and Glasglow coma scale (GCS) in the prognosis evaluation of septic-associated encephalopathy (SAE).Methods:The data of children with SAE admitted to the Pediatric Intensive Care Unit (PICU), Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences from January 2010 to December 2020 were retrospectively analyzed. They were divided into the survival and death groups according to the clinical outcome on the 28th day after admission. The efficiency of PCIS, PRISM Ⅲ, PELOD-2, p-SOFA and GCS scores for predicting death were evaluated by the area under the ROC curve (AUC). The Hosmer-Lemeshow goodness-of-fit test assessed the calibration of each scoring system.Results:Up to 28 d after admission, 72 of 82 children with SAE survived and 10 died, with a mortality rate of 12.20%. Compared with the survival group, the death group had significantly lower GCS [7 (3, 12) vs. 12 (8, 14)] and PCIS scores [76 (64, 82) vs. 82 (78, 88)], and significantly higher PRISM Ⅲ [14 (12, 17) vs. 7 (3, 12)], PELOD-2 [8 (5, 13) vs. 4 (2, 7)] and p-SOFA scores [11 (5, 12) vs. 6 (3, 9)] ( P<0.05). The AUCs of PCIS, PRISM Ⅲ, PELOD-2, p-SOFA and GCS scores for predicting SAE prognosis were 0.773 ( P=0.012, AUC>0.7), 0.832 ( P=0.02, AUC>0.7), 0.767 ( P=0.014, AUC>0.7), 0.688 ( P=0.084, AUC<0.7), and 0.692 ( P=0.077,AUC<0.7), respectively. Hosmer-Lemeshow goodness-of-fit test showed that PCIS ( χ2=5.329, P=0.722) predicted the mortality and the actual mortality in the best fitting effect, while PRISM Ⅲ ( χ2=12.877, P=0.177), PELOD-2 ( χ2=8.487, P=0.205), p-SOFA ( χ2=9.048, P=0.338) and GCS ( χ2=3.780, P=0.848) had poor fitting effect. Conclusions:The PCIS, PRISM Ⅲ and PELOD-2 scores have good predictive ability assessing the prognosis of children with SAE, while the PCIS score can more accurately evaluate the fitting effect of SAE prognosis prediction.