Objective To explore how to improve the capability of emergency rescue to cope with the explosion of hazardous chemicals through analyzing the rescue process of Tianjin port 8 · 12 explosion hazard.Methods The process of explosion emergency rescue on the hazardous chemicals warehouse of Ruihai company in Tianjin Port on the evening of August 12,2015,were analyzed,summarize the experience and lessons.Results There were some shortcomings on field assessment,safety zoning,EMSS,treatment in hospital,personal protection equipment and public knowledge on hazardous chemicals explosion in Tianjin port 8.12 explosion hazard.we should learn from the lessons,to provide reference for the future similar rescue.Conclusions The ability of emergency rescue team to deal with the major hazardous chemicals explosion should further improve,to protect the safety of society and health of common people.

Objective To investigate the correlation between meteorological factors and the incidence of acute cardiovascular disease.Methods The number of calls for ambulance in case of cardiovascular disease between 2006 to 2010 was obtained from Beijing 120 emergency center and the data of meteorological factor during for the same period from Beijing Meteorological professional were collected,and then the impact of the weather factors of different seasons of weather factors on the incidence of cardiovascular disease was ere analyzed by time-stratified case-crossover design.Results The average daily incidence cases of cardiovascular disease in four seasons average daily were 5.61,4.55,5.05 and 6.03 respectively.The association between temperature Temperature and the incidence of acute cardiovascular disease was were non-linear relationship changes in spring and autumn seasons.Atmosphere Air pressure and the incidence were negatively correlated in the winter.The relative humidity of airand the incidence were related in the spring,summer,autumn.Wind and the incidence were related in the spring,summer,but negative correlation in the autumn,winter.Conclusions The incidences of acute cardiovascular disease are higher more in winter and spring than in summer and autumn.The incidences of cardiovascular disease are related with temperature,relative humidity,wind speed and other meteorological factors.,The influence of meteorological factors on the incidence of the disease delays to occur after changes in weather.

Objective:To investigate the change of expression of miR-7 in activated CD4+ T cells in vitro, and preliminary explore its possible significance. Methods: CD4+CD62L+T cells was purified from splenocytes of FVB mice by magnetic cell sorting system (MACS). After stimulation with anti-CD3/CD28 antibody,the relative expression of miR-7 was examined by Real-time PCR, and the expression level of CD69 molecular was analyzed by FACS. Furthermore,the relative expression of miR-7 in CD4+T cells was detected at different time points during stimulation. With the treatment of ERK inhibitor PD98059,change of miR-7 expression was de-termined by Real-time PCR. Meanwhile, the proliferation of CD4+T cells was examined by CCK-8 assay and the expression level of CD69 and CD62L molecular were analyzed by FACS. Finally,the expression of cytokines IL-6,IL-10,and IFN-γ were determined by Real-time PCR. Results:Compared with control group,the relative expression of miR-7 was increased significantly after stimulation with anti-CD3/CD28 antibody,as well as expression level of CD69 molecular was augmented(P<0. 05). In contrasted with 0 h and 24 h,the expression of miR-7 was significantly increased after 48 h and 72 h during stimulation(P<0. 05). Furthermore,the relative expression of miR-7 was significantly declined in CD4+T cells in ERK inhibitor PD98059 treatment group. Finally, the expression level of CD69 molecular,as well as cytokines IL-6, IL-10 and IFN-γ, were also decreased significantly ( P<0. 05 ) . Conclusion: The relative expression of miR-7 was significantly increased in activated CD4+T cells,closely related to ERK pathway,which provided an important foundation for successive research work on exploring the functional role of miR-7 in the CD4+T cells.

PurposeTo measure the areas and diameter lines of bronchi at acute exacerbation and at remission period in patients with chronic obstructive pulmonary disease (COPD) using CT, and to explore the correlation between the two periods and evaluate the comprehensive assessment in diagnosing COPD exacerbation.Materials and Methods Fifty-two COPD patients were scanned with 64-row spiral CT on chest and PFT at acute exacerbation and at remission period. The areas and diameter lines of apical segmental and the sub-segmental bronchi of the right upper lobe in the patients were measured at the two periods, including indicators such as wall thickness (WT), thickness-diameter ratio (TDR), wall area (WA), percentage of wall area (WA%). The differences of those indicators at the two periods were compared with such factors of COPD comprehensive assessment as forced expiratory volume at the first second% (FEV1%), percentage of forced expiratory volume in first second to forced vital capacity (FEV1/FVC), COPD assessment test (CAT), modified medical research council questionnaire (mMRC) for assessing the severity of breathlessness, 6-minute walking distance (6MWD). Results The patients had significant differences between acute exacerbation period and remission period in the indicators of COPD comprehensive assessment like FEV1%, FEV1/FVC, CAT, mMRC and 6MWD (t=-4.119,-2.583, 4.012, 3.321 and-3.892,P<0.05). Compared with those at remission period, the WT, TDR, WA and WA% of sub-segmental bronchi were all higher at acute exacerbation period (t=3.025, 2.341, 2.204 and 2.124, P<0.05); only TDR of segmental bronchi showed significant difference between the two periods (t=2.990,P<0.05). The correlation of sub-segmental bronchi with FEV1%, FEV1/FVC, CAT, mMRC and 6MWD was more significant than that of segmental bronchi with those indicators at the two periods.Conclusion The COPD comprehensive assessment can help diagnose COPD at acute exacerbation period; MSCT shows the remodeling of segmental and sub-segmental bronchi and the changes on the airway wall, and the quantitative measurement of sub-segmental bronchi has correlation with the differences of indicators in the comprehensive assessment; COPD comprehensive assessment seems to be more valuable than PFT in the estimation of COPD at acute exacerbation.

Objective To investigate the changes in the expression of GABAAα1, receptors in medial prefrontal cortex (mPFC) in a rat model of neuropathic pain. Methods Nine male Wistar rats weighing 200-210 g were randomly divided into 3 groups ( n = 3 each): control group (group C) , sham operation group (group S) and neuropathic pain group (group P). Neuropathic pain was induced by chronic constrictive injury. The right sciatic nerve was exposed and 4 loose ligatures were placed on the sciatic nerve at 1 mm intervals with 3-0 chromic catgut. In group S, the right sciatic nerve was exposed but not ligated. The thermal and mechanical pain threshold was measured at 1 d before and 1,4,7, 10 and 14 d after operation. The animals were then sacrificed and the mPFC was removed. The expression of GABAAα1, receptors in mPFC was determined by Western blot. Results Compared with C and S groups, thermal and mechanical pain threshold were significantly decreased and the expression of GABAAα1, receptors was up-regulated in group P ( P ＜ 0.01) . There was no significant difference was in the thermal and mechanical pain threshold and expression of GABAAα1 receptors between C and S groups (P ＞ 0.05). Conclusion Up-regulation of GABAAα1 receptor expression in mPFC may be involved in the development and maintenance of neuropathic pain in rats.

Objective To examine the expression levels of cyclin Dl in the patients with chronic myelogenous leukemia (CML), and evaluate the pathogenesis and clinical significance of cyclin Dl in CML Methods The real-time quantitative polymerase chain reaction (RQ-PCR) was performed to detect the expression levels of cyclin Dl in the bone marrow samples of 18 patients with CML, and 16 samples of benign hemopoietic patients. The relationship between the expression levels of cyclin Dl and the progression and prognosis of patients with CML were analyzed. Results The level of cyclin Dl was higher expressed in 18 patients with CML than the control group (P <0.001). The levels of cyclin Dl was apparently higher expressed in accelerated phase /blast crisis phase than in chronic phase (P <0.05). And the RQ-PCR method showed the tendency that a significant increase was observed in the levels of cyclin Dl from 0.1980 in control group to 1.4002 in chronic phase and 5.4540 in accelerated phase /blast crisis phase. Conclusion The cyclin Dl overexpressed in CML, the roles of cyclin Dl in CML might be an oncogene expressed. The expression level is correlated with the progression and prognosis of patients with CML.

Objective To study the protein oxidative damage and its possible mechanism caused by multi-walled nanotubes(MWCNTS)in mice.Methods Totally 20 Kun-ming mice were divided randomly into 4 testing groups(n=5 for each group),with 0.1,0.2 and 0.4mg/ml MWCNTS suspension injected groups and saline injected group as control group.After 5 days exposure,the protein carbonyl content was measured by using spectrophotometric DNPH assay to reflect the degree of protein oxidative damage.Results The results showed that the protein carbonyl content in livers in 0.2 and 0.4mg/ml MWCNTS suspension injected groups were significantly higher than that in saline group(P

Objective UPLC-MS/MS bio-analysis method was developed for the simultaneous determination ofberberine,naringin,hesperidin,and neohesperidin in plasma of rats.Methods UPLC Acquity BEH C18 (50 rmm × 2.1 mm,1.7 μm) column was used,mobile phases were containing 0.05％ formic acid and 2 mmol/L ammonium formate in water (A)-containing 0.05％ formic acid in acetonitrile (B) as the mobile phase gradient elution;SD rats were randomly divided into oral administration berberine group,Citrus aurantium extract group,and berberine and C.aurantium extract compatibility group.Results UPLC-MS/MS method could be applied to determination of berberine,naringin,hesperidin,and neohesperidin,method validation meets the requirements of biological sample analysis.When rats were administered with berberine and C.aurantium extract compatibility,the plasma concentration of berberine was much more than single dose of berberine group and the bioavailability of berberine was increased.Meanwhile,naringin and neohesperidin can be detected in rat's plasma.Conclusion The bioavailability of flavonoids is significantly improved as well compared to the single dose of C.aurantium extract.This suggests that berberine and C.aurantium extract compatibility has significant drug-drug interaction.

Objective To explore the feasibility of repairing porcine bile duct defect with decellularized rabbit abdominal aorta matrix scaffold.Methods Sodium dodecyl sulfate and Sodium deoxycholate were used to remove the cells in the blood vessel,and the residual DNA and RNA fragments were removed by nuclease.The prepared scaffold was implanted to repair defect of bile duct in swine,which were sacrificed after 45 days of surgery for histological evaluation.Results HE,Masson and elastic fiber staining showed that the composition and structure of the scaffold maintained their native features after dcellularization treatment.DNA content in acelllular scaffold (0.12 ± 0.01) μg/mg dry weight) was significantly decreased as compared with the native ones (2.31 ± 0.03) μg/mg dry weight,P ＜ 0.05).Collagen content was increased from (152 ±22) μg/mg dry weight in intact aorta to (177 ±21) μg/mg dry weight.Adipose derived mesenchymal stem cells with typical morphology survived well in the decellularized vascular matrix.It was observed that seeded ASCs penetrated into the inner wall of the scaffold.After transplantation,there was no leakage in the anastomosis and collapse of acellular blood vessel matrix.After 45 days of transplantation,repaired bile duct was harvested for histological evaluation.HE and Masson staining revealed that there were a large number of cells distributed in the inner wall of the scaffold,and some suspected epithelial cells and glands were found.Conclusion Decellularized aorta matrix scaffold hold great potential in serving as scaffold repairing defect of bile duct.

Objective To investigate whether cyclic GMP-AMP synthase ( cGAS ) , a cytosolic DNA sensor, could recognize the reverse transcription intermediate and induce the subsequent signaling path-way during the infection of human T cell leukemia virus type 1 ( HTLV-1 ) . Methods Biotin-labeled ssDNA90, a reverse transcription intermediate of HTLV-1, was transfected into HeLa cells and the interac-tion between it and cGAS was detected by co-immunoprecipitation experiments. HeLa cells were co-cultured with HTLV-1-positive MT2 cells and the interaction between cGAS and stimulator of interferon genes ( STING) was analyzed by co-immunoprecipitation experiments. The expression of STING in HeLa cells was silenced by siRNA. cGAS was transfected into the HeLa cells 24 h after the silencing and after 24 h, these cells were co-cultured with MT2 cells for another 24 h. Real-time PCR assay was used to measure the ex-pression of IFN-β, RANTES ( regulated upon activation, normal T-cell expressed, and secreted) , TNF-α, HTLV-1 protein Tax, p19 and HBZ. Immunoblot assay was performed to evaluate the phosphorylation of IRF3 and p65 in HeLa cells. Results cGAS interacted with ssDNA90. cGAS interacted with STING in the cytoplasm. In STING-silenced HeLa cells, cGAS transfection had no influence on the expression of IFN-β, RANTES , TNF-α, Tax , p19 or HBZ , nor did it affect the phosphorylation of IRF3 or p65 . Conclusions cGAS interacted with HTLV-1 RTI ssDNA90 and activated STING-dependent innate immune responses.