Objective:To explore whether the introduction of web problem based learning (WPBL) teaching method in medical humanities English class under the background of new medical science is helpful to the course learning and the improvement of students' humanistic quality.Methods:Taking 602 students from Batch 2017 clinical medicine in Xi'an Medical University as the experimental group and 610 students from Batch 2018 as the control group, the research lasting a semester was carried out around eight modules. The control group adopted the traditional teaching mode, while the experimental group used the WPBL mode for teaching relying on the Blue Pigeon Cloud Network Language Learning Platform. After teaching, through comparing the final exam results and issuing self-made questionnaires, the teaching effects of the two methods on students' self-study ability, thinking ability, teamwork ability and knowledge application ability were compared. The data were statistically processed by SPSS 20.0.Results:The final average score of the experimental group (62.13±2.11) was higher than that of the control group (60.42±2.03), with significant differences ( P < 0.05). According to the statistical analysis of the questionnaire, there were differences between the two groups in evaluating the teaching effect, and the proportion of the experimental group was over 60%, significantly higher than that of the control group. 93.3% of the students in the experimental group were satisfied with the WPBL teaching method, while only 43.0% of the students in the control group were satisfied with the traditional teaching method, showing a significant difference between them. The evaluation of students in the experimental group were higher than the control group in terms of self-study ability, data access ability, knowledge exploration ability, language expression ability and problem finding and solving ability. 91.1% of students in the experimental group believed that the introduction of WPBL teaching mode in the course would help to improve their medical humanistic quality, which was significantly higher than the proportion of students in the control group. Conclusion:The empirical study shows that the introduction of WPBL teaching method in medical humanities English course can not only enable students to master learning skills, but also strengthen students' humanistic quality, thus promoting the development of medical education.

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Recombinant human epidermal growth factor (rhEGF, 20 ng/ml) and Genistein (740 μmol/ml) were added to the cells from 12 cases of human pituitary tumors and co-cultured in vitro. The 3H-thymidine uptake of tumor cells was measured by scintillation counter and tyrosine kinases activity was detected by using immunocytochemical method. The results showed that 3H-thymidine uptake and tyrosine kinases activity were increased in 10 out of 12 cases of human pituitary tumor by EGF and both declined by Genistein. It was suggested that EGF had a strong mitogenic effect on majority of pituitary tumors. Genistein could abolish the effects of EGF promoting the proliferation of the tumor cells, inhibit the growth of the tumor and might be useful in pituitary tumor treatment.

0.05) but CO, SV and CVP increased and SVR decreased significantly after AHH in both groups as compared with those before AHH. pH, Lac and COP did not change significantly after AHH. There was no significant difference in the volume of solution infused, blood loss, CO, SV, CVP and SVR between the two groups. Conclusion Age is not a primary factor negating the use of AHH. Under combined general-epidural anesthesia AHH with 6% hydroxyethyl starch (15 ml?kg-1 ) can be well tolerated by the elderly patients without cardiac and pulmonary disease.

Objective To investigate the effect of isoflurane administered before ischemia on polymorphonuclear neutrophil (PMN) infiltration and expression of adhesion molecules in the lung injured by ischemia-reperfusion.Methods One-hundred and twenty male SD rats weighing 250-350 g were randomly divided into 4 groups ( n = 30 each) :Ⅰ sham operation group (S) ;Ⅱ I/R group in which hilum of left lung was clamped for 45 min and then undamped for reperfusion; Ⅲ Iso + I/R in which 1 MAC isoflurane was inhaled for 30 min before ischemia and Ⅳ Iso + S in which 1 MAC isoflurane was inhaled for 30 min without I/R. The animals were anesthetized with intraperitoneal pentobarbital 50 mg?kg-1 then tracheostomized and mechanically ventilated with 100% O2(VT= 10-15 ml?kg-1) . PaCO2 was maintained at 35-45 mm Hg. Right jugular vein and left carotid artery were cannulated for BP monitoring, blood sampling and fluid and drug administration. Anesthesia was maintained with ketamine 10 mg?kg-1?h-1 and vecuronium 0.1 mg?kg-1?h-1. 1 MAC isoflurane (1.38% in rats) was inhaled for 30 min before hilum of left lung was clamped with an atraumatic clamp. Left lung ischemia was maintained for 45 min then the left lung was released for reperfusion. MAP was monitored and blood gases were analyzed during experiment. The animals were killed at the end of 45 minute ischemia and at 30, 60 and 120 min reperfusion and left lung was removed for: (1) determination of W/D lung weight ratio, myeloperoxidase (MPO) activity and expression of ICAM-1 mRNA; (2) light and electron microscopic examination; (3) broncho-alveolar lavage (BAL). BAL fluid (BALF) was collected and the number of cells, percentage of PMN and total protein concentration in BALF and the expression of CD18 on PMN surface were determined. Results The W/D lung weight ratio, MPO activity and expression of ICAM-1 mRNA in the lung tissue, the percentage of PMN and TP concentration in BALF and the expression of CD18 on PMN surface were all significantly increased during reperfusion in I/R group but isoflurane pretreatment significantly attenuated the I/R induced increases. Histological examination showed that the I/R induced lung injury was also ameliorated by isoflurane pretreatment. Conclusion Inhalation of isoflurane before ischemia could protect the lungs against I/R injury by inhibiting the PMN infiltration and expression of ICAM-1 mRNA and CD-18.

Objective:To explore the mechanism of growth factor autocrine stimulation in human pituitary tumors. Method: Immunohistochemical analyses of EGF、TGF-αand EGFR were studied on paraffin-embeded sections of 30 pituitary tumors. Results: Expression of EGFR and its ligand EGF、TGF-αhas a variable stained cells intensity,density and type. EGFR and the ligands expressed in majority of pituitary tumors.Conclusion:The EGF autocrine stimulation exists in pituitary tumors,and tyrosine kinases inhibitors may be useful for pituitary tumors treatment.

Dysfunctions of vascular endothelial permeability are related to a number of human diseases such as atherosclerosis, high blood pressure, stroke, inflammation, cancer, diabetes-induced retinopathy, macular edema and so on. Shear stress is an important mechanical force that affects vascular endothelial cells. It plays a particular role in permeability regulation. Rho GTPases is a family of small G proteins which act as cell signal molecules. They are assumed to mediate the regulation of the permeability of vascular endothelial cells. In this paper review is given on how shear stress regulates the permeability of vascular endothehal cells as well as the in-fluence of Rho GTPases on the role in molecular mechanism. It is suggested that shear stress-regulated vascular endothelial permeability is mediated by Rho GTPases.

Objective:To construct GM-CSF and EB virus LMP2A fusion gene recombinant adenovirus and identificate it , using recombinant adenovirus to do immunologic study.Methods:With RT-PCR and Western blot to detect GC 2A gene expression of the recombinant adenovirus , with ELISA to analysis antibodies of vAd-GC2A stimulation in murine body , lactate dehydrogenase assay to detect the mouse cellular immunity effect , thereby the recombinant adenovirus immune effect was initially analysis.T-test method was used to do preliminary analysis and evaluation of the immune effect of recombinant adenovirus .Results:GC2A fragment amplified by PCR, the size was 1 961 bp and it was the expected.The results showed, the recombinant adenovirus vAd-GC2A proteins can be recognized by sera antibody of GM-CSF ( LMP2A); the results of ELISA showed that vAd-GC2A can stimulate the generation of antibodies.EBV-positive tumor cell killing rate (%) by CTL induced recombinant adenovirus was (66.7 ±6.9)%, at the same time the adenovirus type 5 wild strains and PBS were (24.3 ±2.5)%and(32.4 ±3.1)%only(P≤0.05).Conclusion:Fusion gene has been successfully constructed , vAd-GC2A in mice have humoral and cellular immune function.The data suggest that the vAd-GC2A should play a potent role in preventing the positive EB virus tumor.

Objective To identify the expression of a fusion gene GCA formed from GM-CSF gene and LMP2A gene of Epstein-Barr virus (EBV) in a recombinant BCG (rBCG) and to study its immunoge-nicity.Methods The rBCG was constructed to express the fusion gene GCA and the expressed products were detected by Western blot assay .ELISA was performed to measure specific antibody titers in serum sam-ples from mice immunized with rBCG .Lactate dehydrogenase assay was used to analyze the cellular immuni-ty of mice.A mouse model of EBV-positive gastric carcinoma was established to evaluate the therapeutic effects of rBCG.Results The target proteins of GM-CSF and LMP2A were successfully expressed in rBCG . The specific antibodies were detected in rBCG immunized mice as indicated by ELISA .The maximum anti-body titer reached 1 ∶27 900 [(326.5±7.8) pg/ml] as injection with rBCG 5×108/mouse.The rBCG in-duced cytotoxicity of cytotoxic lymphocytes (CTLs) to EBV-positive gastric carcinoma cells (GT39) (with a killing rate of 89.6%±6.8%) was significantly higher than that of control group (P<0.05) The sizes of tumor in PBS control group [(1964.0±548.7) mm3] and BCG group [(1268.65±72.4) mm3] were big-ger than those in rBCG group [(168.64±78.80) mm3].Conclusion The rBCG expressing GM-CSF and LMP2A fusion gene was successfully constructed .The rBCG could induce humoral and cellular immune re-sponses in mice and inhibit the growth of tumor .

Objective To observe the protective effect of the zinc gluconate combined with Salvia injection on noise induced serum immunoglobulin(IgG,IgM,IgA) and immune molecules (IL-2,IL-4) in rats.Methods 50 female SD rats were randomly divided into control group,noise group,zinc gluconate noise group(plus zinc group),Salvia injection noise group (plus Salvia group) and Zinc gluconate oral liquid and Salvia injection noise group(combined group),10 rats in each group.Except the control group,rats in the other groups were continuously exposed to high frequency steady noise for two weeks.The concentrations of serum immunoglobulin (IgG,IgM,IgA) and immune molecules (IL-2,IL-4) after the intervention of noise were compared.Results Serum levels of IgG,IgM,IL-2,IL-4of the control group were significantly higher than the noise group (all P ＜ 0.05),plus zinc group (all P ＜ 0.05),plus Salvia group(all P ＜0.05),the differences were statistically significant.Serum level of IgA of each group was not statistically different compared with control group (all P ＞ 0.05).Serum levels of IgG,IgM,IL-2,IL-4 in the noise group were significantly lower than those in the control group (all P ＜ 0.05),combined group (all P ＜ 0.05),the differences were statistically significant.Serum levels of IgG,IgM,IL-2 in plus zinc group were significantly higher than the noise group(all P ＜ 0.05).Serum IgA concentration of each group showed no significant difference compared with noise group(all P ＞ 0.05).Conclusion Zinc gluconate oral solution and Salvia injection have protective effect on immune system affected by noise in rats,the protective effect of combination of zinc gluconate oral solution and Salvia injection is stronger than the individual.