OBJECTIVE:To investigate the inhibitory effect of astragalosides on proliferation of lung adenocarcinoma SPCA-1 cells. METHODS:After the cells were cultured in 0 (blank control),7.8,15.6,31.2,62.5,125.0 and 250.0 μg/ml for 48 h, MTT method was used to determine cell viability and median inhibitory concentration(IC50)was calculated,and terminal deoxynu-cleotidyl transferase-mediated dUTP-biotin nick end labeling assay(TUNEL)and flow cytometry were employed to detect apopto-sis. RESULTS:Compared to the blank control,after the cells were cultured in 7.8,15.6,31.2,62.5,125.0 and 250.0 μg/ml as-tragalosides for 48 h,the cell viability was poorer(P<0.01),and IC50 was 61.75 μg/ml;after the cells were cultured in 15.6,31.2, 62.5,125.0 and 250.0 μg/ml astragalosides for 48 h,the apoptosis rate was higher. CONCLUSIONS:Astragalosides have an anti-tumor effect to some degree by a mechanism which may be related to inhibiting cancer cell proliferation and accelerating apoptosis.

Objective: To improve the safety of anesthesia of the neonates at high risk during surgical operation. 　Methods:Before the operation, Anisodamine, Ketamine and Vecuronium bromide were injected intravenously with dosage of 0.06mg, 2mg*kg-1 and 0.08-0.1mg*kg-1, respectively. Tracheal cannula or topical anesthesia using 1% of lidocaine hydrochloride was performed. The tracheal cannulation was performed after administration of sodium hydroxybutyrate and Ketamine by injection with dosages of 50-80 mg*kg-1 and 2mg*kg-1 body weight. Anesthesia apparatus and combinative anesthesia were used. The concentrations of SpO2 were monitored during the operation. A dosage of 1-2mg*kg-1 body weight was used for resuscination of the patients after the operation. 　Results: A total of 100 cases of operation were performed using the regime of anesthetic intervention described above. A 100% of success rate was achieved and no death occurred during the operation. 　Conclusion:Significant improvement of safety in anesthesia of the neonates at high risk during surgical operation can be achieved with sufficient preoperational preparation, adequate monitoring during the operation and rational use of anesthetics as well as restrict selection of suitable anesthetical interventions.

Objective To investigate the changes and roles of hypoxia inducible factor 1?(HIF 1?) expression in myocardial tissues in rats following severe scald. Methods Male Wistar rats inflicted with 40% TBSA Ⅲ degree scald were used as animal models. HIF 1? protein in myocardial tissues was detected by Western blot and immunohistochemical technique. Results HIF 1? protein expression in rat myocardial tissues increased significantly in the early stage following scald. The difference in HIF 1? level between the left and right ventricles was significant. The increased HIF 1? protein was mainly located in the nucleus. Conclusion HIF 1? protein expression in myocardial tissues of rats can be induced by severe scald and HIF 1? protein expression in the left ventricle is significantly higher than that in the right ventricle. The increased HIF 1? protein in the nucleus can induce downstream cytokine expression.

Dendritic cells(DCs),representing a heterogenous population of professional antigen-presenting cells,are the initiators and modulators of the immune responses.Studies indicate that regulatory T cells contribute to immune nullipotency and immune suppression via cell-cell contact or cytokine secretion.These two kinds of cells may be valuable tools for modulating immunity in the setting of autoimmunity,cancer,chronic viral infections and graft rejection,etc.Here we discuss the current knowledge on the functions of regulatory T cells and denditic cells-based immunoregulation and the applications.

Epigenetic modification includes DNA methylation, histone modification, non-coding RNA, etc., and is crucial in determining gene expression. A growing number of recent studies have shown that epigenetic regulation may play a central role in the pathogenesis of sepsis. Due to its explicit mechanism and relatively mature technic, DNA methylation has received extensive attention in sepsis-related researches. By examining recent studies on septic DNA methylation mechanism, this review elucidates the key role in sepsis occurrence and progression that DNA methylation plays from etiology, immunology and other aspects, as well as its application potential in the diagnosis, prognosis and treatment of sepsis before pointing out the direction for further research.

Objective To investigate the effect of high mobility group box-1 protein (HMGB1) on inter-leukin-2 (1L-2) and interleukin-2 receptor α (IL-2α) expressions in human T lymphocytes and its potential regulat-ing mechanism in vitro. Method Human T lymphocytes were isolated and suspended, the cells were cultured with 20 μg/mL phytohemagglutinin (PHA) in 5% CO_2 at 37 ℃, recombinant human HMGB1 (rhHMGB1, 0, 10, 100, 1000 ng/mL) was added with the PHA and cultures were centrifuged at 12 and 48 hours for cell collect-ing. Reverse transcription polymerase chain reaction (RT-PCR) amplification was perfomed to determine gene ex-pressions of IL-2, IL-2Rα. IL-2, sIL-2R protein levels in cell culture supematants were measured by ELIZA. Re-sults After coincubated with rhHMGB1 (10, 100, and 1000 ng/mL) for 12 hours, IL-2 levels in cell culture su-pernatants respectively were 0 . 064 ± 0. 017 μg/L, 0.076±0.033 μg/L, and 0.061 ±0.02 μg/L, which were significantly higher compared with the untreated cells (0.045±0.011 μg/L, P < 0.05 or P < 0.01). Mean-while, IL-2 mRNA expression was markedly up-regulated following rhHMGB1 stimulation in various doses (F = 4.6872, P < 0.01). At 48 bourn, however, both IL-2 mRNA expression and protein production tended to de-crease along with an increased dose of dd-IMGB1 stimulationn. IL-2/sIL-2R ratio in 1000 ng/mL rhHMGB1 was markedly lower than that in 10 ng/ml rhHMGB1 (0.036±0.015 vs.0.055±0.017, P <0.05), together with down-regulation of IL-2Rα mRNA expression(P <0.01). Conclusions These data indieated that HMGBI could marked influence the IL-2/IL-2R expression in human T lymphocytes. With the increase in stimulating doses and prolongation of time, HMGBI might down-regulate T cell-mediated immune response of human lymphocytes.

A wide range of computer and internet applications impact on people's lifestyles andways of thinking profoundly, Internet acculturation is an important research issue in the information age.By the literature review,this paper summed up the themes of medical students' internet acculturation:in-ternet addiction disorder research,internet morality anomie research and internet learning adaptation re-search.Some suggestions for future research were put forward at last.

In the context of ongoing health reform,it is important to establish and improve the regulation system of public hospitals.By defining the concept of regulation,regulation theories for public hospitals,the regulation systems of the typical countries,the paper summarizes the international experience enlightenment to China's public hospital regulation reform.

Objective Based the previous studies, the present study was performed to investigate the antagonistic effects of different doses of Astragaloside IV on the immune function of Treg mediated by HMGB1 in vitro and its potential mechanism.Methods CD4+CD25-T cells isolated from the spleens of male BABL/c mice by magnetic beads were seeded on 48-well cell culture plates and were randomly divided into four groups as follows(12 holes per group). Normal control group: CD4+CD25-T cells were cultured merely. Treg group: Tregs(100μl) and CD4+CD25-T cells were co-cultured in ratio of 1:10. HMGB1+Treg group: Tregs(100μl) stimulated by HMGB1(1μg/ml) for 72 h and CD4+CD25-T cells were co-cultured in ratio of 1∶10. HMGB1+AST IV+Treg group: Tregs(100μl) stimulated by HMGB1(1μg/ml) and AST IV(100μg/ml)for 72 h were co-cultured with CD4+CD25-T cells in ratio of 1:10. CD4+CD25-T cells and supernatants were again collected on post-culture 72 hour. The proliferation of CD4+CD25- T cells was analyzed by MTT test, the activity of NFAT and the contents of cytokines of IL-2 released into supernatants were also determined by means of ELISA. Results When CD4+CD25-T cells were co-cultured with Tregs, the cell proliferation(0.166±0.039) and the levels of NFAT(0.156±0.035) and IL-2(2.38±0.58) in supernatant were markedly decreased as compared with those in the control group(P<0.01). However, the contrary results were found when CD4+CD25-T cells were co-cultured with Treg stimulated by HMGB1. Compared with those in the(HMGB1+Treg) group, the contrary results were showed with a dose-dependent in the(HMGB1+ASTⅣ+Treg) group.Conclusion ASTⅣcan rivalry the effects of HMGB1 on immune function of Treg in vitro, this result indicate that ASTⅣhas the therapeutic action on inflammation promoted by HMGB1.

Informationization teaching resources contain a large number of information so rea-sonable and effective application of the resources is of great significance to the teaching. The article tries to explore and work out some teaching strategies for effective application of informationization teaching resources through action research combined with literature research , questionnaire survey method , interview and other methods. The research process: the original teaching strategies of infor-mationization teaching resources were implemented , implicated and verified in the first round action research; the problems in the first round were summarized and analyzed and the original teaching strategies were adjusted and optimized in the next round action research; finally, the teaching effec-tiveness between the two rounds action research was evaluated and analyzed by the “classroom teach-ing effectiveness criteria based on the use of information technology teaching resources”. The results show that effective application of informationization teaching resources is of great help to the teaching effect. It can enhance the learners' interest in learning and improve their academic performance. Ap-propriate and rational teaching strategy should be provided flexibly according to the learning back-ground and characteristics of students as well as learning contents.