Medical English teaching plays an important part in medical college,but due to various factors of constraints,medical English teaching is still in the traditional"teacher-centered" teaching mode.The authors have carried out some research and exploration on how to construct the "student-centered" teaching mode in medical English teaching based on their own practice,and made some positive comments and suggestions.

Objective To investigate the serum levels of vascular endothelial growth factor(VEGF)in patients with obstructive sleep apnea hypopnea syndrome(OSAHS),and make a primary relative study on the relationship between VEGF and pH.Methods Thirty-nine patients with mild to moderate OSAHS,36 patients with severe OSAHS and 18 healthy snorers who had been admitted to the First Hospital Affiliated to Wenzhou Medical College from Feb.2003 to Sep.2004 were enrolled in this study.The serum levels of VEGF were detected in all patients at 7:00 AM the next day after the detection of polysomnography(PSG).Additionally 31 patients with OSAHS were detected by doppler echocardiography to get the values of pulmonary artery pression.Results There was nocturnal hypoxia in patients with OSAHS compared with healthy snorers,and the degree of nocturnal hypoxia was depended with the grade of OSAHS(both achieved statistical difference)by the detection of PSG.The levels of VEGF was significantly higher in patients with severe OSAHS than in healthy snorers(P

OBJECTIVE To investigate the antimicrobial resistances of Gram-negative bacilli isolated from patients with lower respiratory infection in intensive care unit(ICU),so as to provide reasonable selections for antibiotic in clinical treatment.METHODS The phlegm specimens from ICU inpatients with lower respiratory tract infection were collected from 2004 to 2007,and drug sensitivity test was performed according to NCCLS standards.RESULTS Gram-negative bacilli were accounted for 75.2% of total strains.The most predominant pathogens were Pseudomonas aeruginosa(42.7%),Acinetobacter baumannii(16.3%),Sternotrophomonas maltophilia(10.4%),Escherichia coli(10.0%),and Klebsiella pneumoniae(6.7%).The prevalence of ESBLs in E.coli and K.pneumoniae increased from 54.5% and 37.5 % in 2004 to 65.6 % and 52.7% in 2007.ESBLs non-producing strains showed lower resistance rates to the aminoglycosides,quinolones and the third and fourth generation cephalosporin than those of ESBLs producing strains.Nonfermentative Gram-negative bacilli were very highly resistant to most antimicrobial agents.CONCLUSIONS The drug resistance rates of Gram-negative bacilli of lower respiratory tract are serious.It is important to investigate the antimicrobial resistances of pathogenic bacteria and rationally use of antibiotics.

As the impact of molecular and genomic data grows in epidemiology,numerous studies of genetic epidemiology and post-genomics research rely increasingly on the use of human biobanks.Biobanking ranges in scope from small collections of samples in academic or hospital settings to large-scale national repositories.In this context,the construction of biobank is confronting With numerows ethical challenges,informed consent in particular.The paper analyses several concent moder of participation in biobank and explores the optinal model of China——opt-out.

0.05). The low level expression of p27 protein was inversely correlated with degree of differentiation and tumor recurrence of GIST(P

Objective To investigate the peroxide effects of iodide excess on mitochondria in Fischer rat thyroid cell line(FRTL) in the early period.Methods After treatment with 0.0 mmol/L(control group) or 0.1 mmol/L potassium iodide(KI) for 2,4 and 24 h,respectively,changes of mitochondrial superoxide formation were assayed by flow cytometry and fluorescence microscopy using mitochondria-targeted hydroethidine(MitoSOX).The cytochrome c (cyt c) released from mitochondria to cytoplasm was detected by immunocytochemistry.The lactate dehydrogenase (LDH) released into supernatant was measured by a LDH kit using colorimetry.The percent of dead cells was assayed by flow cytometry using propidium iodide (PI).DNA with loading buffer was separated in 1％ agarose gel.Results Mitochondrial superoxide production in FRTL cells treated with 0.1 mmol/L KI was increased at 2; 4 and 24 h,especially at 2 h.The rates of cyc c protein immunity positive cells at 2,4 and 24 h in 0.1 mmol/L KI group were (35.3 ± 3.6)％,(45.8 ± 5.5)％ and (30.3 ± 6.1)％,respectively,which were significantly higher than that in control group[(14.8 ± 1.2)％,all P ＜ 0.05].The LDHs released into supernatant at 2,4 and 24 h in 0.1 mmol/L KI group were (1.85 ± 0.32),(6.63 ± 0.42) and (8.35 ± 0.34)U/mg,and these values at 4 and 24 h in 0.1 mmol/L KI group were significantly higher than that of control group[(0.89 ± 0.04)U/mg,all P ＜ 0.05].After incubation with 0.1 mmol/L KI for 2,4 and 24 h,the percentages of dead FRTL cells were 7.52％,9.29％ and 13.71％,respectively,while that of control group was 4.66％.After FRTL cells were treated with 0.1 mmol/L KI for 24 h,DNA ladder appeared.Conclusion Iodide excess (0.1 mmol/L) can cause mitochondrial peroxide injury in FRTL cells at 2 h and cell apoptosis at 24 h.

Objective: To evaluate the antitumor effect of polysaccharide from spirulina platensis(PSP), and its synergic and attenuated effects on chemotherapeutic drugs in tumor-bearing mice. Methods: Mouse models of transplanting tumor were established. Antitumor effects of PSP and PSP combined with chemotherapeutic drugs were observed and the effect of PSP on leukopenia induced by chemotherapeutic drugs was also investigated. Results: PSP significantly inhibited S180 and H22, the inhibitory rate being 50 %-58 %and 43 %-51 %respectively. PSP evidently increased the antitumor action of cytoxan, PDD and 5-Fu, and elevated the number of white blood cells in leukopenia. Conclusion: PSP can obviously inhibit the tumor growth, also has synergic and attenuated effects on chemotherapeutic drugs.

Aim The aim of the present study is to in-vestigate the effect of the specific antagonist NVP-AAM077 and Ro25-6981 of NMDA receptor subunit NR2A and NR2B on global cerebral ischemia-induced neuronal injury in the CA1 region. Methods Male C57BL/6 mice subjected to global ischemia by the three-vessel occlusion( 3-VO) method,were divided into four groups: sham-operated group,ischemia/reperfusion control group,NVP-AAM077 treatment group,and Ro25-6981 treatment group. Hippocampal sections were processed for Fluoro-Jade B staining to detect degenerating neurons and for Nissl staining to identify surviving neurons. The expression of brain derived neurotrophic factor( BDNF) were measured by Western blot. Results ① Transient brain ischemia induced selective and delayed neuron death in the CA1 region of the hippocampus at 12-minute ischemia after reperfusion 3 days. NR2A subtype specific antagonist NVP-AAM077 enhanced neuronal death after transient global ischemia ( P

ObjectiveTo identify the first cases of cholera in Huainan,0139 epidemic causes and biological properties. MethodsConventional methods of serological and bacteriological methods of the strains were identified by polymerase chain reaction (PCR) to detect cholera virulence genes, susceptibility testing modified KB.Results1 ,was isolated and serum agglutination results,2 patients were all positive stool samples,6 were in close contact with all the negative rectal swab;turtle pond-like 18,5 were positive;turtle egg in battle were like 9,2 were positive ; turtle eggs 7, the positive three copies; turtle waste 11, were negative. 2, or more positive culture drug sensitivity test of the pioneer B, doxycycline resistant; to ampicillin, tetracycline in sensitive;on norfloxacin, gentamicin, ciprofloxacin sensitive. 3,or more positive cultures gene DNA PCR test results,cholera toxin(CT) ,toxin coregulated pilus (TCP) all were positive. ConclusionFrom the outbreak of cholera 0139 is water pollution caused by turtle ponds,The trip types of 0139 Vibrio cholera were highly homologous with that isolated from green turtle;the bacteria of the pioneer B, doxycycline resistance and carrying cta, tcpa virulence genes.

Objective To estimate the 10-year risk of coronary heart disease in patients with psoriasis,and to determine whether the risk profile is affected by disease duration,family history and clinical types of psoriasis.Methods Data were pooled from 322 inpatients with psoriasis and 297 inpatients with other skin diseases (151 cases of acute urticaria,33 drug eruption,113 herpes zoster) from December 2008 to December 2010 in the Department of Dermatology,West China Hospital of Sichuan University.Risks of coronary heart disease were estimated by using the Framingham risk score algorithm.Wilcoxon rank test,Kruskal-Wallis test and chi-square tests were used to evaluate the differences in risks and risk factors between the patients with psoriasis and controls.Results As far as the Framingham 10-year risk score was concerned,the difference was statistically significant between the patients with psoriasis and the control population (6％ vs.4％,Z =4.342,P =0.000),as well as between patients with different clinical types of psoriasis (6％ for psoriasis vulgaris vs.4％ for pustular psoriasis vs.7％ for psoriasis arthropathica vs.7％ for erythroderma psoriaticum,H =8.484,P ＜ 0.05),but was insignificant between patients with familial and sporadic psoriasis (6％ vs.6％,Z =0.406,P ＞ 0.05 ).No correlation was observed between the Framingham 10-year risk and psoriasis duration (P ＞ 0.05 ).Conclusions Increased risks of coronary heart disease exist in patients with psoriasis compared with those with acute urticaria,drug eruption or hepers zoster,and in patients with psoriasis arthropathica or erythroderma psoriaticum compared with those with pustular psoriasis.The Framingham 10-year risk of coronary heart disease is uncorrelated with disease duration and unaffected by family history of psoriasis.