Objective It has been known that cyclooxygenase-2(COX-2) acts as a tumor promoter in rodent models for colorectal cancer, but its precise role in the processes of carcinogenesis remains unclear. The study was designed to observe the relationship between expression of COX and the expression of vascular endothelial growth factor (VEGF) in the mouse embryo fibroblast (MEF) with knock out of COX-1 gene (COX-1 -/- ) or COX-2 gene (COX-2 -/- ) and wild MEF cells (COX-1 +/+ /COX-2 +/+ ). Methods We cultured the mouse embryo fibroblasts, measured the VEGF levels in the culture medium of these cells using ELISA, and extracted mRNA from these cells to identify the expressions of VEGF isoforms by RT-PCR. Results VEGF level could hardly be measured in the COX 2-deficient cells (COX-2 -/- ), however, the VEGF level was significantly increased in the cells with COX-2 gene (COX-2 +/+ ) and decreased by celecoxib, a COX-2 inhibitor. The level of VEGF was not associated with COX-1 expression. COX-2 inhibited the expressions of three isoforms of VEGF at mRNA level. Conclusions COX-2 plays an important role in the VEGF secretion and synthesis and therefore, it has an effect on the angiogenesis and tumor growth.

OBJECTIVE:To improve the quality and efficiency of ADR monitoring in hospital for the convenience of reporters and ADR monitoring personnel.METHODS:Combined with the characteristics of hospital information system,computer technology such as network,ASP.NET programming language,SQL server 2005 database and data transformation were used to develop and apply ADR monitoring system based on hospital local area network.RESULTS:The ADR reporting quality has been improved and the quantity of ADR reports increased markedly and was kept stable.CONCLUSION:The system contributed to a informationalized and networking administration of ADR reporting,and it improved ADR reporting level thus deserving to be recommended.

Objective To analyze the influence of Helicobacter pylori (H.pylori) and smoking on serum pepsinogen (PG) levels in gastric adenocarcinoma (GAC).Methods Serum PGⅠand PGⅡ levels were measured by using radioimmunoassay method;H.pylori infection was determined by Hp-IgG antibodies in stored serum samples by using enzyme-linked immunosorbent assay and 14C urea breath test.Results In H.pylori negative cases,the serum PGⅠmean level in current smoking GACs was significantly increased compared with those non-smoking or ever-smoking GACs (the former:t=2.709,P

Objective To probe into the association between the polymorphisms of HLA DRB1, DQB1 alleles and esophageal squamous cell carcinomas and then to further examine the features of their immunogenetics. Methods The polymorphisms of HLA DRB1, DQB1 alleles were typed by sequence specific primer based on polymerase chain reaction in 42 patients with esophageal squamous cell cancer and 136 normal control subjects. Results Allele frequency of HLA DRB1 *0901 allele was significantly higher in esophageal cancer patients than that in normal controls ( 0.250 0 vs 0.139 7 , P = 0.028 , odd ratio= 2.053 , etiologic fraction= 0.128 2 ) and so was allele frequency of HLA DQB1 * 0301 ( 0.297 6 vs 0.187 5 , P = 0.046 , odd ratio 1.835 , etiologic fraction 0.135 4 ). There was no association between the rested alleles of HLA DRB1 and DQB1 alleles in the patients. Conclusions Individuals carrying HLA DRB1 * 0901 and/or DQB1 * 0301 may be susceptible to esophageal squamous cell carcinoma, and nucleotide sequences of these two alleles were in accordance with the corresponded allele sequence (exon 2) of genebank.

Objective To investigate the expression of inducible nitric oxide synthase (iNOS) in human gastric carcinoma and its relationship with angiogenesis, lymph nodes metastasi s and clinical staging of gastric carcinoma. Methods The expression of iNOS in 50 patients with gastric carcinoma was studied with im munohistochemical method. Microvessel density (MVD) of human gastric carcinoma was also determined with anti-CD34 as the labelled vascular endothelial cells. Results The rate of expression of iNOS in 50 cases of gastric carcinoma was 70.0% , and MVD averaged 22.0?9.8, higher than those in the tissues around cancer (16 .2%,6.1?3.4) and normal gastric tissues (15.0%,5.5?2.6; P

AIM:The effective abortifacient drug,mifepristone,was incorporated in the solid lipid nanoparticles (SLNs). The aim of this paper was to study the influence of ratios of drug to lipid on the characteristics of SLNs.METHOD:The physicochemical properties of the fine dispersed systems,such as the size distribution,Zeta potential had been analyzed by laser diffractometry(LD).The measurements of entrapment efficiency(EE)and thermal analysis of DSC were performed as well.RESULT:It was showed if the weight of lipid remained unchanged,the mean particle size of SLNs increased with the increase of drug amount.Drug entrapment efficiency was the highest while about 50 mg drug was loaded on weight 1 g lipid.Simultaneously,the charge of Zeta potential agreed well with the amount of free drug in the colloidal system.DSC analysis results showed that the melting peak of mifepristone at approx.190 ℃ disappeared.CONCLUSION:It was evidence that the drug incorporation would affect the average particle size and Zeta potential of the colloidal systems and the physical state of crystalline drug mifepristone in SLNs was present in the amorphous form or molecularly dispersed at even so high adding amount of 250 mg/g(lipid),which there was no report about the physical state of the drug and SLN with so high drug-loading.It was suggested that the model drug mifepristone could influence the property of nanodispersion system and the crystalline character of the drug was altered by the nanometer carrier system vice versa.

This paper introduced the development and application of a computer management system for nursing care knowledge,which could manage intra-and extra-nursing care knowledge respectively and realized information share,utilization and innovation. It motivated the nurses to study actively,helped them with knowledge accumulation and innovation,elevated nurses' job identification,optimized team culture construction and increased work efficiency.

Objective To explore the value of electrocardiagraphy and risk stratification in patients with early repolarization syndrome( ERS ). Methods All of 271 eases were divided into three groups: 7 ERS patients with cardiac events (syncope,clinical sudden death or incompleted, ventricular fibrillation and induced ventricular fibrillation during electrophysiological), 82 ERS patients without cardiac events, and 182 cases without heart disease who were matched for age and sex. QRS interval,Tpeak-Tend (TpTe) interval,corrected QT interval(QTc) and QT deviation degree (QTd) in surface ECG were compared among the three groups. Results TpTe interval in ERS patients with cardiac events was significantly longer than that in ERS patients without cardiac events and the control subjects [ ( 123.3±22.4 ) ms vs (87.7±15.5 ) ms; ( 123.3±22.4) ms vs (83.5±15.1 ) ms, P < 0.05 ]. There was no significant difference in QRS interval, QTc and QTd among three groups. Conclusion TpTe interval in ECG might be useful in risk stratification with ERS, but further research is needed.

AIM:To investigate the effect of activation of retinoid X receptor (RXR) on transforming growth factor β1 (TGF-β1) induced collagen synthesis under hypoxic environment in rat cardiac fibroblasts (CFs) and underlying molecular mechanisms .METHODS: CFs were cultured using myocardial tissue with dry method .Hypoxic environment was established for CFs by continuous nitrogen supplement .Type I and type III collagens in supernatants were detected by ELISA.Nuclear and cytoplasmic extractions were prepared using NE-PER nuclear and cytoplasmic extraction reagents .The protein levels of Smad2 and p-Smad2 were determined by Western blot and immunocytochemical staining .RESULTS:Un-der hypoxic condition , TGF-β1 (0.01~10 μg/L) increased the synthesis of type I and type III collagens in a dose-de-pendent manner in the CFs .At the concentration of 5μg/L, the synthesis of collagen I and III was significantly increased as compared with control group (P<0.01).RXR agonist 9-cis-retinoic acid (9-cis-RA;10 -9 ~10 -6 mol/L) decreased TGF-β1 (5μg/L)-induced synthesis of type I and III collagens in a dose-dependent manner in the CFs under hypoxic con-dition.The synthesis of type I and type III collagens was significantly inhibited by 9-cis-RA (P<0.01).Smad2 inhibitor ( 20 nmol/L) showed similar inhibitory effect on the synthesis of type I and III collagens induced by TGF -β1 under hypoxic condition.Compared with TGF-β1 intervention group, the cytoplasmic level of p-Smad2 in the CFs was significantly in-creased in TGF-β1+9-cis-RA group, but the nuclear p-Smad2 level was significantly decreased (P<0.05).CONCLU-SION:Retinoid X receptor agonist 9-cis-RA inhibits TGF-β1-induced synthesis of type I and type III collagens in the CFs by repressing p-Smad2 nuclear translocation under hypoxic condition .

Systolic anterior motion of mitral valve ( SAM) is a relatively uncommon complication , but it can result in se-vere left ventricular outflow tract(LVOT) obstruction and/or mitral regurgitation(MR), even can be life-threating.Echocardio-graphy is still the first-line method of SAM diagnosis.Due to LVOT obstruction and MR reducing the long-term prognosis of pa-tients with SAM, it is necessary to carry out surgical treatment for patients with SAM for whom conservative treatment are not ef-fective.Then mitral valve repair(MVREP) is the first choice.Besides, surgical techniques for treatment and prevention of SAM have made great progress which have promoted the popularization of MVREP , and the rate of MVREP in mitral valve oper-ation has been greatly improved .