The paper analyzes the problems of the specialized databases and search engines during document retrieval and the reasons for constructing retrieval thesaurus in the field of medical field,and establishes a retrieval thesaurus jointly reviewed by sci-tech novelty assessment and subject specialists by taking sci-tech novelty report of the sci-tech novelty station of the Ministry of Education since 2014 as the data sources.The thesaurus applies to sci-tech novelty assessment,document retrieval teaching and other fields,which can also be promoted in other fields.

It is important that the oral hospital establish a guarantee system of medical graduation clinical practice quality. Having experienced clinical education for many years,the hospital has formed a system in order to achieve objective management and process management organic unification,which can gradually promote the clinical practice quality.

Objective To evaluate the effect of transcutaneous electrical acupoint stimulation(TEAS)on emergence agitation in children under?went general anesthesia with sevoflurane. Methods Sixty children aged 3?6 years underwent adenoidectomy and tonsillectomy were selected and randomly divided into two groups:TEAS(group T,n=30)and control(group C,n=30). After venous induction,the general anesthesia was main?tained with sevoflurane. Group T received continuous TEAS at point hegu and neiguan after anesthesia induction till the end of operation. Control group were not given TEAS. The change of the blood flow dynamics in the process of anesthesia,the time of extubation,awaking time and the time in PACU were recorded. The emergence agitation,postoperative nausea and vomitting and respiratory depression were observed. Results There were no significant differences in gender,age,weight,anesthesia time,and operative time between the two groups (P>0.05 ). There was no significant difference in extubation time,awaking time and time in PACU between the two groups(P>0.05). The mean arterial pressure and heart rate in group T were lower than those in group C at the time of extubation and in PACU(P<0.05). The emergence agitation scale in group T was lower than in group C(P<0.01). There was no significant difference in incidence rate of PONV and respiratory depression between two groups. Conclusion TEAS can reduce emergence agitation in children with sevoflurane?induced general anesthesia,but not prolong extubation time,awaking time and time in PACU. In addition,it does not increase the incidence of respiratory depression.

Objective To activate and amplify γδT cells with low molecular peptide antigen of Mycobacterium tuberculosis low molecular peptide antigen (Mtb-Ag),and to investigate the expression of CD69 molecules on γδT cellular surface.Methods Healthy human peripheral blood mononuclear cells (PBMC) were obtained and separated,then positive cells were isolated by immuno-magnetic beads selection,and the proportion of γδT cells in the PBMCs was detected by fluorescent monoclonal TCR γδT-PE staining and flow cytometry.Expression of CD69 molecules in γδT cells was detected by γδ-PE/CD69 FITC double staining.Results The proportion of γδT cells was (4.9±1.85)％ in freshly obtained PBMC,(69.2±6.57)％ after 10 d of Mtb-Ag activation,and (99.3±8.92)％ after immuno-magnetic beads selection.The expression of CD69 molecules in γδT cells reached the peak (75.2％) at 24 h after initial Mtb-Ag stimulation,and reached the peak (72.0％) at 6 h after second stimulation.Conclusions MtbAg can specifically stimulate the proliferation of γδT cells in the PBMC.Both its initial and the second stimulation can specifically activate γδT cells.

Objective To investigate the expression of Semaphorin3B (SEMA3B) in hepatocellular carcinoma (HCC) and reveal its clinical significance.Methods Immunohistochemistry and Western blotting were performed to examine the expression of SEMA3B protein in 56 hepatocellular carcinoma samples,matched perineoplastic tissues and 14 normal liver samples.Microvessel density (MVD) was determined by counting CD34-positive endothelial cells.Statistical methods were performed to analyse the relationships between the expression of SEMA3B and clinicopathologic factors.Results The rate of the SEMA3B-positive in HCC tissues was 42.9％ and significantly lower than that in normal liver tissues and non-cancerous adjacent liver tissues(78.6％ and 85.7％,respectively)(P＜0.05).MVD in SEMA3B-positive HCC tissus was lower than that in SEMA3B-negative HCC tissus (P＜0.05).The expression of SEMA3B was closely related to tumor nodular number,tumor size,tumor capsulation and CLIP score (P＜0.05 for all).The recurrence and metastasis rate in SEMA3B-positive group was lower than that in the negative group(P＜0.05),and the survival rate in positive group was higher than that in the negative(P＜0.05).Conclusion The expression of SE-MA3B was decreased in HCC tissues,and its expression was closely associated with tumor progression,angiogenesis and prognosis,indicating that it might seve as a predictor of prognosis and a possible novel target of antiangiogenic therapy for patients with HCC.

OBJECTIVETo construct a GFP/Puro double-labeled lentiviral expression vector for CK8 silencing and assess the effects of CK8 silencing on cell apoptosis.

METHODSThe siRNA sequences of CK8 were inserted into the lentiviral expression vector GV248 and transfected into 293T cells with the packaging plasmids PMD and SPA. The lentivirus was collected at 24 and 36 h post-transfection. Flow cytometry was used to detect the virus titer and the positive cells were selected with puromycin. The knockdown of CK8 was examined by Western blotting. The effect of CK8 down-regulation on cell apoptosis induced by cisplatin was detected with Annexin V/PI staining.

RESULTS AND CONCLUSIONWe successfully constructed CK8 interference lentiviral vector and obtained a stable cell line with CK8 knock-down that was sensitive to cisplatin-induced apoptosis.

Apoptosis ; Cell Line ; Down-Regulation ; Genetic Vectors ; Humans ; Keratin-8 ; genetics ; Lentivirus ; Plasmids ; RNA Interference ; RNA, Small Interfering ; Transfection

Objective To study phylogenies, epidemiology and genetic environment of CTX-M type of ESBLs produced by Escherichia coli and Klebsiella pneumoniae isolated from nine hospitals in Guangzhou. Methods The phylogenies of CTX-M type of ESBLs were analyzed by PCR Genetic environment of CTX-M-15 encoding gene (bla_(CTX-M-15)) were investigated by conjugation test and plasmid analysis. The clonal relationship of strains producing CTX-M-15 was determined by enterobacterial repetitive intergenic consensus PCR (ERIC-PCR). Results A total of 361 ESBLs-producing isolates of Escherichia coli and Klebsiella pneumoniae were collected. 67.3% of ESBLs strains were detected to produce CTX-M-type ESBLs, and the commonest genotypes in Escherichia coli and Klebsiella pneumoniae were CTX-M-14 (35.4% and 28.3%), CTX-M-15(21.5% and 26.1%) EBIC-PCR products of all CTX-M-15-producing strains show 39 strains of Escherichia coli were classified into 27 genotypes while 43 strains of Klebsiella pneumoniae were divided into 30 genotypes. Furthermore, the genotypes of CTX-M-55, CTX-M-19, CTX-M-27, with ceftazidime-hydrelyzing activity, were detected in this study. The great majority of bla_(CTX-M-15) genes were found to locate on a 65 000 bp-conjugative plasmid, and there was no blaTEM-1, bla_(OXA-1), blaDSA-1 or aac (6')-Ib-cr gene coexisted on the plasmid, ISEcp1-like insertion sequences, relative to mobilization of bla_(CTX-M-15) gene, were detected in all bla_(CTX-M-15) positive strains, and the distances between the end of ISEcp1-like insertion sequences and the start cedon of bla_(CTX-M-15) were equal, with 48 base pairs. Conclusion CTX-M-14 is still the most common genotype of ESBLs in Guangzhou, but high prevalence of CTX-M-15 ESBLs hydrolyzing ceftazidime already appears in south China.

Objective:To investigate the current situation of general practitioners' occupational pressure in Heilongjiang Province, and explore its relationship with professional identity and perceived organizational support. It aims to provide references for the construction of general practitioners and the development of general medical education.Methods:The general situation questionnaire, perceived organizational support scale, occupational pressure scale, and professional identity scale were applied through network and site surveys for collecting data. A total of 288 questionnaires were collected with 263 valid questionnaires (91.3%). Pearson correction analysis and bootstrap analysis were performed for data analysis.Results:The average score of occupational pressure among general practitioners was (115.95±22.40), and the results of Pearson correction analysis showed that perceived organizational support was negatively correlated with occupational pressure ( r=-0.413, P<0.01) and positive correlation with professional identity ( r=0.587, P<0.01). There were also significant negative correlations between professional identity and occupational pressure ( r=-0.442, P<0.01). Moreover, the mediating effect showed that professional identity had a certain mediating effect on the relationship between perceived organizational support and occupational pressure (LLCI=-0.2039, ULCI=-0.0760, P<0.05). Conclusion:General practitioners' occupational pressure was at a high level, which can be reduced through improving the perceived organizational support and professional identity.