Objective To observe the effects of Qingzhi soft capsule(QSC) on improving experimental memory in mice.Methods The model of vascular dementia was made by means of bilateral carotid artery ligation and reperfusion after 8 minutes in mice.Another model of learn and memory disorder was induced by subcutaneous injection of sodium nitrite.The effects of Qingzhi soft capsule on memory disorder were evaluated by step-down test,Y-maze test in mice.Results Compared with sham-operated group,for the mice model of vascular dementia suffered cerebral ischemia and neural cell injury,the step down latency of animal model was shorter(P

Objective To evaluate the reliability of gas sampling from the distal end of the tracheal tube for partial pressure of end-tidal CO2 (PETCO2) monitoring in neonates.Methods A total of 50 fullterm neonates,scheduled for elective abdominal surgery under general anesthesia,aged 1-28 days,weighing 2.55-4.00 kg,of ASA physical status Ⅰ or Ⅱ,were randomly divided into 2 groups (n =25 each) using a random number table:gas samples collected from proximal end of tracheal tube group (group P) and gas samples collected from distal end of tracheal tube group (group D).Epidural catheters of 1 mm in external diameter were used.One end of the catheter was connected to a tube for carbon dioxide sampling,and the other end was inserted into the endotracheal tube and advanced toward the distal hole of the tube.At 15 min of mechanical ventilation,blood samples were collected from the radial artery for record of PETCO2 and for blood gas analysis.Consistency test was performed between PETCO2 and partial pressure of arterial CO2 (PaCO2).Results PET CO2 was significantly lower than PaCO2 in the two groups.There was no significant difference in PaCO2between the two groups.PETCO2 was significantly higher in group D than in group P.Kappa was significantly higher in group D than in group P.Conclusion Gas sampling from the distal end of the tracheal tube is more reliable than gas sampling from the proximal end in monitoring PETCO2 in the neonates.

Objective To estimate the effect of high total cholesterol (TC) on life expectancy in China.Methods Population attributable fractions (PAF) of high TC were calculated in both urban,rural areas and regions,using data related to TC levels from the chronic disease risk factor surveillance in China,2013.Together with PAFs,data related to death registry,demographics,attributable deaths from high TC and its effect on life expectancy,were estimated.Results In 2013,the TC level in Chinese population aged 25 and above appeared as (4.8± 1.0) mmol/L,higher in urban areas [(4.8±1.0) mmol/L] than that in rural areas [(4.7± 1.0) mmol/L)],with the highest in eastern regions [(4.9 ±1.0) mmol/L] and lowest in the central regions [(4.6 ± 1.0) mmol/L].TC level appeared as (4.8 ± 1.0)mmol/L in both sexes.A total of 2.9％ of all the deaths were attributed to high TC (264 998 deaths),among which 89.3％ were caused by ischemic heart disease (236 540 deaths).PAF was seen higher in females (3.7％) than that in males (2.3％),higher in urban (3.4％) than that in rural areas (2.4％),with the highest in eastern (3.7％) and lowest in western regions (2.1％).Mortality that attributed to high TC was 19.6/100 000,higher in females (21.2/100 000) than that in males (18.0/100 000),higher in urban (20.8/100 000) than that in rural areas (18.2/100 000),with the highest in eastern (23.2/100 000) and lowest in western regions (15.6/100 000).In 2013,the loss of life expectancy that caused by high TC was 0.30 year,higher in females (0.35 year) than in males (0.26 year),higher in urban (0.34 year) than that in rural areas (0.28 year),with the highest seen in the eastern (0.36 year) and lowest (0.23 year) in the western regions.Conclusion In 2013,the effect of high TC on life expectancy appeared different between genders,urban and rural areas or regions,with greater impact on females,urban and eastern areas of the country.

Objective:To quantitatively analyze the death and disability-adjusted life years (DALY) attributed to high level serum LDL-C in Chinese population in 2017.Methods:Data were obtained from the '2017 Global Burden of Disease Study (GBD2017)’. Population attributable fraction (PAF), number and rate of deaths and DALY attributable to high LDL-C were used to describe the burden of disease by gender, age groups, diseases and provinces in China. Both rates on mortality and DALY were standardized by GBD world population.Results:In 2017, 862 759 deaths were caused by high level serum LDL-C in China, that accounting for 8.25 % of the total deaths. Of the attributable deaths, 705 355 (81.76 %) persons died from ischemic heart disease (IHD), while the remaining 18.24 % from ischemic stroke (IS). High LDL-C accounted for 40.30 % of the total deaths from ischemic heart disease and 18.49 % from ischemic stroke. The highest PAF of death (13.70 %) appeared in Jilin province and the lowest in Zhejiang province (4.65 %). PAF of death was seen higher in females than in males, while both age-standardized rates of mortality and DALY appeared higher in males than in females. High LDL-C attributed mortality rate appeared as 61.08/100 000 after standardization in Chinese population. High LDL-C attributed DALYs were 18.16 million person years, among which 76.76 % were caused by IHD (13.94 million person years), with DALY rate as 1285.83/100 000. Among provinces, Heilongjiang showed the highest standardized DALY rate, and Zhejiang the lowest. The PAF, number of deaths, rates on mortality and DALY caused by high LDL-C were high among residents above 70 years old, with the DALY number as 8.56 million person years, highest seen in the age group from 50 to 69 years old. Conclusion:The burden of disease attributed to high level LDL-C was quite high and with gender, age group and interprovincial differences, in China in 2017.

AIM:To investigate the effects and underlying mechanism of Toona sinensis bark extract(TAE)on the colon mucosal barrier and gut microbiota in mice with ulcerative colitis(UC)induced by dextran sulfate sodium(DSS).METHODS:Sixty C57BL/6J mice were randomly assigned to control,model,and mesalazine(0.2 g/kg)groups,as well as TAE groups(low,medium,and high-doses equal to crude drug concentrations of 2.3,4.6 and 9.2 g/kg,respectively).The UC model was induced by drinking of 2.5％DSS,and mean while the drugs were administered for 10 days.The mice were then evaluated in terms of weight,disease activity index(DAI),colon length,spleen index,and pathological changes in the colon tissues.In addition,the level of apoptosis in colon tissues was assessed by terminal de-oxynucleotidyl transferase dUTP nick-end labeling(TUNEL)fluorescence staining,and the expression of related proteins was evaluated by Western blot,levels of inflammatory factors were determined by enzyme-linked immunosorbent assays(ELISA),and the activities of total superoxide dismutase(T-SOD)and catalase(CAT)and malondialdehyde(MDA)content were assessed by biochemical assays.Furthermore,the constitution and diversity of the gut microbiota were inves-tigated by 16S rRNA gene sequencing.RESULTS:Compared with the control group,mice in the model group showed significantly reduced body weights(P<0.01),and the colon length was shortened significantly(P<0.05).Marked in-creases in the DAI and spleen index were observed(P<0.01),along with severe damage to the colon mucosa(P<0.01).Mechanistically,the level of intestinal epithelial cell apoptosis was significantly raised(P<0.01).The model group showed markedly reduced expression of occludin and claudin-1(P<0.01),the level of IL-10,and activities of T-SOD and CAT in the colon tissues(P<0.01).While the levels of IL-6,IL-1β,TNF-α,and the MDA content were increased signif-icantly(P<0.05).The abundance and diversity of the gut microbiota were decreased in the model group(P<0.05).Com-pared with the model group,all these indicators were ameliorated by the administration of TAE(P<0.05).The abundance of pathogenic bacteria,including Proteobacteria and Escherichia-Shigella,was decreased remarkably(P<0.05),while that of probiotics,including Bacteroidota and Muribaculaceae,were increased significantly(P<0.05).The abundance and diversity of the gut microbiota were increased.CONCLUSION:Taken together,Toona sinensis bark alcohol extract can alleviate damage to the intestinal mucosa by suppressing the apoptosis of intestinal epithelial cell,reducing the inflam-matory response,and mitigating oxidative stress.Treatment with TAE could also maintain the homeostasis of the gut micro-biota by regulating the abundance,ultimately meliorate the function of intestinal mucosal barrier.