Objective To observe the impact of Aspergillus fumigatus conidia on the early apoptosis of alveolar epithelial cells.Methods A549 cells was first stimulated with tumor necrosis factor-α(TNF-α)or staurosporine (STS)to induce cell apoptosis,and then co-cultured with Aspergillus fumigatus conidia of three different concentrations (5 × 10 5 ,5 × 10 6 ,5 × 10 7 )simultaneously.The changes of the apoptosis rate of A549 cells were detected by flow cytometry.Results The early apoptosis of A549 cells was increased markedly after stimulated with TNF-α ([14.94 ± 0.82 ]% vs [3.26 ± 0.74]%,χ2 =9.18,P <0.05)and STS ([18.10±1 .00]% vs [3.26±0.74]%,χ2 =12.32,P <0.05). When Aspergillus fumigatus conidia of different concentrations were added,the apoptosis rate was decreased (χ2 =31 .23,P <0.05 ).The early apoptosis of A549 cells was negatively correlated with the concentration of Aspergillus fumigatus conidia (rTNF = - 0.92,r STS = - 0.94,both P < 0.05 ). Conclusion Aspergillus fumigatus conidia inhibits the early apoptosis of A549 cells induced by TNF-αor STS and the inhibit effect increases with the concentration of Aspergillus fumigatus conidia.

ABSTRACT:Objective To study the effects of weight and anteroposterior diameter-to-transverse diameter ratio on establishing a model of acute myocardial infarction (AMI)in rats without artificial ventilation and changes in left ventricular function after infarction.Methods Healthy SD rats were randomly divided into group A (200-250 g),group B (250 - 300 g),group C (> 300 g),and group D (control group).The left anterior descending (LAD)coronary artery was ligated to establish a model of myocardial infarction under spontaneous breathing condition immediately after thoracic lines were measured.And changes of electrocardiography were recorded after model establishment.At 2 and 4 weeks after AMI,we observed ventricular wall thickness and ventricular wall motion and measured the changes of cardiac function.Histomorphological changes and myocardial ultrastructure of the heart were observed under thoracotomy 2 weeks after operation.The above data were analyzed by SPSS13.0 statistics software.Results ① The first AMI rat model was established successfully after 30 times of experiments, and after 100 times the model’s success rate gradually stabilized at about 83%.② Group B and group C had a higher model success rate than group A (P <0.05),but group B and group C did not differ in modeling success rate (P >0.05).③ There was no association between the rate of rat thoracic line and modeling success rate (P >0.05).
④ Two weeks after thoracotomy,ischemic myocardial color was white,and ventricular wall motion decreased.HE staining revealed that cardiomyocytes disappeared and were replaced by fibrous tissues and collagen.Remnant cardiomyocytes were arranged disorderly and myofibers were fractured,with interstitial damage and hyperplasia of fibrous tissue.Visible muscle cells were sparse and dissolved,the mitochondria had darker staining,blurred cristae, and edema under electron microscopy. ⑤ Compared with group D, 2 weeks and 4 weeks after myocardial infarction,left ventricular end-diastolic diameter (LVEDD)and left ventricular end systolic diameter (LVEDs) increased (P <0.05),but EF values and heart rate dropped (P <0.05).Conclusion By this method,a model of AMI in rats can be established successfully and the heart function is changed.Under the condition of non-artificial ventilation,the weight of rats is an important factor for establishing AMI model.However,we have not confirmed the effect of thoracic lines on establishing AMI model yet.

Objective To improve objectivity and accuracy of the diagnosis,prognosis,treatment efficiency and observe the levels of cognitive and intelligent deficits of children with attention deficit hyperactive disorder(ADHD).Methods Event related potentials(ERP)P3 wave test provocated by audition and Wechsler intelligence scale for children(C-WISC) test were detected and compared in 60 children with ADHD(ADHD group) and 60 cases of healthy children(healthy control group).The ERP P3 wave test results between 2 groups of children which had different intelligent balance ability were also compared.Results Compared with the healthy control group,there was a significantly longer latency of P3 wave(P

Objective To investigate plasma glutathione S-transferase(GSTs) activity and GSTP1 gene Ile105Val polymorphism in Bijie City, Guizhou Province, a coal-burning fluorosis endemic area. Methods One hundred and sixty villagers from Yachi Twon using non-improved cooking stoves were selected as the non-intervened group in Bijie City, Guizhou Province where coal-burning fluorosis was prevailing; 153 villagers as the intervented group were chosen from Changchun Twon, where cooking stoves were improved; 151 villagers were served as the control group from Baiyunshan Twon, Changshun County without endemic fluorosis. The activity of GSTs was tested by colorimetric analysis with spectrophotometer. The genotype of the GSTP1 gene Ile105Val polymorphism, presenting as either homozygous wild-type (AA), or heterozygous mutation type (AG), or homozygous mutation type (GG), was detected through the PCR-RFLP procedure. Results The activity of GSTs in plasma of non-intervened group [(12.44±4.97) kU/L]was significantly lower than that of intervened group (P < 0.05), and that of intervened group[(20.78±6.20)kU/L]was significantly lower than that of control group[(24.30±6.27)kU/L, P< 0.05]. The difference of the enzyme activity of three groups were statistically significant (F = 51.71, P < 0.05), but this enzyme activity did not vary significantly in each sex of each grnup(P > 0.05). Compared intervened group [AA:67.3%(103/153), AG:29.4%(45/153),GG:3.3%(5/153)]and non-intervened group[AA:66.9%(107/160), AG:30%(48/160), GG:3.1%(5/160)]with control group[AA:74.8%(113/151), AG:25.2%(38/151), GG:0 (0/151)], the Ile105Val polymorphism site of GSTP1 gene had significant difference(χ2= 6.04,6.07, both P< 0.05), but not significant between intervened and non-intervened groups(χ2 = 0.02, P>0.05). Conclusions Fluorosis can decrease the activity of GSTs and introduce the GSTP1 gene Ile105Val polymorphism, intervention with the fluorine intake will improve the effect of fluoride on the body.

Objective: To analyze the clinical data of 153 patients with novel coronavirus pneumonia (COVID-19) in chongqing ,and provide reference and thinking for the diagnosis and treatment. Methods: Analyze the clinical data, laboratory examination and chest imaging characteristics of 153 COVID-19 patients in Chongqing Public Health Medical Center from January 26 to February 5, 2020. According to the relevant diagnostic criteria ,patients were divided into non-severe group(n=132) and severe group(n=21),and analyze the correlation between serum index changes and disease severity. Results: Combined with diabetes and chronic respiratory diseases, the severity of the disease was statistically significant (χ²=11.04和6.94, P<0.05). No symptoms were found in patients with mild illness (χ²=4.09, P<0.05) .The proportion of fever and muscle soreness in the severe group was higher than that in the non-severe group (χ²=4.40 and 22.67,P<0.05).Among the concomitant symptoms, the proportion of cough and shortness of breath in the severe group was higher than that in the non-severe group (χ²=8.46 and 4.80,P<0.05).C-reactive protein and d-dimer were higher in the severe group than in the non-severe group (t=43.44 and 37.13, P<0.05), and the number of CD₃⁺T lymphocyte cells, CD₄⁺T lymphocyte cells and CD₈⁺T lymphocyte cells in the severe group was lower than that in the non-severe group (Z=27.25, 20.60 and 17.36, P<0.05).Compared with the non-severe group, both lungs and the right lung lower lobe were more susceptible to involved (χ²=6.95和20.39, P<0.05) . Conclusion Severity of COVID-19 was associated with underlying disease, symptoms, site of involvement, C-reactive protein, d-dimer, CD₃⁺T lymphocyte count, CD₄⁺T lymphocyte count, and CD₈⁺T lymphocyte count. 

BACKGROUNDHuman antigen R (HuR) is a ubiquitously expressed member of the ELAV family, and has relatively high cytoplasmic abundance in lung tissue regenerating after injury. In this study, we investigated whether mitogen-activated protein kinase (MAPK)-activated protein kinase 2 (MK2) and HuR participate in the tumor necrosis factor (TNF)-induced expression of interleukin-6 (IL-6).

METHODSHuman pulmonary microvascular endothelial cells were treated with TNF following short interfering RNA-mediated knockdown of MK2 or HuR. Cell supernatants were collected to detect the mRNA and protein expression of IL-6 at different time points. The expression and half-life of IL-6 mRNA were then determined in cells that had been treated with actinomycin D. Finally, after knockdown of MK2, the cytoplasmic expression of HuR protein was analyzed using Western blotting.

RESULTSMK2 or HuR knockdown decreased both the mRNA and protein expression of IL-6 in TNF-stimulated cells. In MK2 knockdown cells, the half-life of IL-6 mRNA was reduced to 36 minutes, compared with 67 minutes in the control group. In HuR knockdown cells, the half-life of IL-6 mRNA decreased from 62 minutes to 24 minutes. Further analysis revealed that knockdown of MK2 resulted in reduced HuR protein expression in the cytoplasm.

CONCLUSIONSMK2 regulates the TNF-induced expression of IL-6 by influencing the cytoplasmic levels of HuR.

Acute Lung Injury ; metabolism ; Cell Line ; ELAV Proteins ; genetics ; metabolism ; Humans ; Interleukin-6 ; metabolism ; Intracellular Signaling Peptides and Proteins ; genetics ; metabolism ; Protein-Serine-Threonine Kinases ; genetics ; metabolism ; Tumor Necrosis Factor-alpha ; pharmacology

Objective The characteristics of spatial-temporal distribution on infected snails were analyzed at the village level in Anhui province,2006-2012.Methods Data on the distribution of infected snails from 2006 to 2012 in Anhui province was collected.Spatial database was established by ArcGIS 9.3.Retrospective spatial-temporal cluster analysis was done by SaTScan 9.1.1 at the village level.Results Eight areas with increased risk and distributed along the upstream to downstream of Yangtze and connecting branch rivers,were found having infected snails,from 2006 through 2012,including one area in 2006,five in 2006-2008,one in 2007-2009 and one in 2009-2011,respectively.Proportion on the number of areas with infected snails decreased from 6.2％ in 2006 to 0.5％ in 2012.Conclusion The spatial-temporal distribution of infected snail was not random but there appeared significant clusters.The trend seemed to be declining in Anhui province,between 2006 and 2012.Areas being detected as smails positive were important for the schistosomiasis control program to be carried out in Anhui province.

Three-dimensional ordered porous carbon materials exhibit potential application prospects as excellent drug supports in drug delivery systems due to their high specific surface area, tunable pore structure, and excellent biocompatibility. In this study, three-dimensional ordered porous carbon materials were prepared using Acanthopanax senticosus herbal residues as raw material and KOH as activating agent through a one-step pyrolysis method. The prepared carbon-based material was systematically characterized by powder X-ray diffraction, scanning electron microscopy, N₂ adsorption-desorption and Fourier-transform infrared spectroscopy. The results show that the three-dimensional ordered porous carbon materials prepared with KOH as the activator via pyrolysis possess abundant functional groups, high porosity, and high specific surface area, with a specific surface area of 1 471.6 m²·g^-1. The three-dimensional ordered porous carbon materials prepared at 800 ℃ exhibits a high drug loading capacity (78.0%) and drug release rate (86.8%) for 5-fluorouracil. Three-dimensional orderly porous carbon materials show significant application advantages in drug construction, and their high specific surface area and adjustable pore size structure significantly improve the drug load rate and drug release rate, providing a solid foundation for the development of efficient and accurate drug delivery system.

Not Abstract.

OBJECTIVETo study the prevalent situation of Japanese encephalitis (JE) virus among healthy people in Heilongjiang province and to analyze its risk factors.

METHODS7 national surveillance counties were selected and divided into 5 age groups as 1-2, 3-5, 6-10, 11-20 and 21-59 years and randomly sampled 7 person in each age group per county with the sample size as 1050. Quantitative Elisa test was used to detect Japanese encephalitis antibody IgG.

RESULTSThe adjusted standard antibody positive rate of people on 1-59 year olds was 70.62%, with lowest in 3-5 age group, and increasing by age (chi2 for trend test = 40.52, P < 0.001). The overall titer of IgG was low in general population but was different with age (Kruskal-Wallis test chi2 = 76.9, P < 0.001). Older age and lower latitude seemed to be two risk factors on JE antibody IgG.

CONCLUSIONJE virus infection had a long-term effect with low level, among general population. Age and latitude were two risk factors which suggesting the necessarily of strengthening the surveillance system for JE cases at risk in the prevalent areas on Heilongjiang province.

Adolescent ; Adult ; Antibodies, Viral ; blood ; Child ; Child, Preschool ; China ; epidemiology ; Encephalitis Virus, Japanese ; immunology ; Encephalitis, Japanese ; blood ; epidemiology ; Enzyme-Linked Immunosorbent Assay ; Female ; Humans ; Immunoglobulin G ; blood ; Infant ; Male ; Middle Aged ; Young Adult