Objective To study the effect of a selective COX-2 inhibitor Celecoxib on cell proliferation and apoptosis of human coloretal cancer cell line HT-29 to seek an effective and safe drug for colon cancer chemoprevention. Methods Using MTT assay, flow cytometry(FCM), acridine orange and ethidium bromide staining, the effect of celecoxib on the proliferation and apoptosis of HT-29 cells were investigated. Results The growth of HT-29 cells was inhibited by celecoxib in a dose- and time- dependent manners. FCM analysis showed that the treated HT-29 cells had typical Sub-G 1 peak, the apoptotic rate of which was (7 31?2 37)%～(48 3?2 86)%. The cell ratio of G 0/G 1 phase increased, whereas the cell ratio of S and G 2/M phases decreased after treatment, which was in a dose-dependent manner as well. The treated HT-29 cells exhibited some morphological features of apoptosis, including cell shrinkage, nuclear condensation, DNA fragmentation, and the formation of apoptosis bodies, the apoptotic index of which was in a dose- and time- dependent manners. Conclusions Celecoxib inhibited proliferation and induced apoptosis of human colorectal cancer cell line HT-29, which may be related to blocking the cell cycle progress of HT-29 cells.

Objective To study the effect of selective cyclooxygenase-2 inhibitor celecoxib on cell apoptosis of human colorectal cancer cell line HT-29 and the probable mechanism involved by detecting the expressions of cytochrome C, Caspase-9 and poly ADP-ribose polymerase(PARP) at protein level. Methods Apoptosis was determined by Acridine orange and Ethidium bromide staining under fluorescence microscope and flow cytometry. The protein expression of cytochrome C, Capsase-9 and PARP were examined by Western blotting.Results Celecoxib induced apoptosis of HT-29 human colorectal cancer cells in a concentration and time-dependent manner from 0 to 120 ?mol/L. Sub-G 1 peak was detected by flowcytometry, and the apoptotic rate was between(7.31?2.37)%-(48.30 ?2.86)%. Celecoxib induced cytochrome C release into the cytosol from mitochondria, then activated Caspase-9 and consequently triggered PARP cleavage.Conclusion Celecoxib can induce apoptosis through a cytochrome C-dependent pathway in human colorectal cancer cell line HT-29.

Objective:To observe the influence of ginsenoside Rg1 on transcriptional activation of NF-κB induced by hydrogen peroxide (H_2O_2) in 293T cell,and probe into the antioxidant mechanism of ginsenoside Rg1.Methods:In the experiment,cells was exposed to H_2O_2 after pretreatment with Rg1,cell proliferation and cytotoxicity studies were detected by MTT and Trypan blue.The quantities of generation of intracellular reactive oxygen species (iROS) was analyzed by flow cytometric analysis measured with fluorescent probe 2,7-dichlorofluorescin diacetate (DCFH-DA).NF-κB-responsive element-luciferase reporter gene was transfected and dual-luciferase cis-reporting systems were used to assay the transcriptional activity of NF-κB under the stimulated circumstance of oxidative stress induced by H_2O_2.Results:The results of MTT showed that ginsenoside Rg1 apparently protected the proliferation of 293T cell,which were repressed by H_2O_2 (P＜0.05).The results by trypan blue showed that H_2O_2 stimulated substantial cytotoxicity.This effect was markedly attenuated by treatment with ginsenoside Rg1.Oxidant production,measured as the fluorescence of dichlorofluorescein,was significant increased by 40%-50% through H_2O_2 stimulation.The decrease in iROS generation was significant blocked by 35%-40% through Rg1 and antioxidant.The relative luciferase reporter assay of NF-κB was apparently improved by H_2O_2-induced(P＜0.05),but Ginsenoside Rg1 significantly repressed the relative value of luciferase (P＜0.05).Conclusion:Ginsenoside Rg1 has the obvious protective function from the damage of oxidative stress damage,whose possible mechanism is to eliminate excessive free radicals of the cells effectively,to reduce transcriptional activation of nuclear factor kappa B(NF-κB),and subsequently to suppress the NF-κB circuit activation.

The paper covered the development, structure, functionality, effectiveness and goals of the community health information system in the district. It is found that Zhabei district has developed the standard electronic health archives which can be collected by various sources and renewed instantly;regional health information sharing and collaboration platform has been established as well; a sharing and joint service platform has been built for regional health information sharing between communities and secondary hospitals shared; "Health key" has been developed as a model for self-service health management for residents.

BACKGROUND: Restriction is a reliable means in the study of psychological stress, and restriction stress can suppress cellular immunity of T lymphocytes through hypothalamus-pituitary-adrenal axis.OBJECTIVE: To investigate the changes of Th1/Th2 balance due to restriction stress in cancer-loaded rats and the growth of cancer so as to explore the effect of psychological stress on cancer cells.DESIGN:Case control study based on experimental animal as subjects.SETTING: Teaching and Research Department of Microbiology and Immunology of Beijing University of Traditional Chinese Medical.MATERIALS: This study was carried out in the Immunology Laboratory of Beijing Traditional Chinese Medical University. Kunming rats of 6-8weeks old were selected. They were raised for 3 days before experiment to adapt to the environment and numbered according to their weight. Rats with the highest and lowest body weight were excluded, and the rest were randomly divided into 4 groups of 16 rats (8 male rats and 8 female rats)weighing 18 to 20 g.METHODS: S180 cancer cells were collected at 7 days of celiac subculture and rinsed with normal saline before made into cell suspensions of 1×1010 L-1 with RPMI 1640 medium. Rats were given subcutaneous injection of 0.2 mL cell suspension at the right axilla in cancer group and cancer-combined restriction group. Meanwhile, the same dosage of normal saline was used instead in normal control group and pure restriction group in the same way. After injection, movements of rats in pure restriction group and cancer-combined restriction group were restricted in specially-made tubes for 8 hours a day. Ten days later rats were killed to remove the tumor and thymus which were then weighed for calculating the thymus index. MTT colorimetry and mitogen-activated immunoblast method were used to examine the proliferation of spleen T lymphocytes and the production of Thl-type cytokines, such as interleukin-2(IL-2), interferon-γ (IFN-γ); meanwhile,ELISA technique was used to detect the level of serum Th2-type cytokines,such as interleukin-4(IL-4) and interleukin-10(IL-10).MAIN OUTCOME MEASURES: Primary outcomes: effect of restriction stress on T lymphocyte' production of IL-2 and interferon-γ, and on IL-4and IL-10 as well as the effect in promoting the cancer growth in cancer-loaded rats. Secondary outcomes: effect of restriction stress on T-lymphocyte proliferation and thymus index.RESULTS: Restriction stress significantly increased the cancer weight and decreased thymus index and the proliferation of spleen T lymphocytes. Meanwhile, IL-2 and IFN-γ produced by spleen cells also decreased, with serum IL-4 and IL-10 level obviously increased in cancer-loaded rats.CONCLUSION:The cellular immunity of cancer-loaded rats was obviously suppressed due to restriction stress, which was presented by decreased Thl-type cytokine production and increased Th2-type cytokine production,resulting in Thl/Th2 cytokine imbalance towards Th2. It may be the important mechanism of its promoting effect on the growth of cancer.

Objective To intervene and appraise the health literacy of diabetic patients entering contracts with family doctors in pilot communities,and learn the effect and feasibility of health literacy management by family doctors for diabetic patients.Methods By means of community intervention study and questionnaire survey,560 diabetic patients as mentioned above in Shanghai were subject to a baseline assessment on their health literacy,followed by management and routine follow-up on their diabetic health literacy.At the end of six months of comprehensive intervention,their health literacy was appraised again to observe the effects of such management.Results Six months of guidance and management found the average scoring of the health literacy of these patients 23.46 over the baseline,an increase of 36.8% of the patients in their compliance of the four basic diabetic diet behaviors,and an increase of 27.8% of them in regular and quantitative exercises.Conclusions It is feasible for community family doctors to carry out the health literacy management for diabetic patients contracted,and health literacy management can change the awareness and behaviors of such patients to some extent.

Objective To explore the role of neurotic in parental rearing patterns and interpersonal sensitive.Methods Using stratified sampling method to test 702 middle school students,symptom checklist 90 (SCL90),Egma minnen av bardndosnaupp forstran(EMBU) and Eycenck Personality Questionnaire(EPQ) were used to investigate and take one and a half years of follow-up observation on the sample of 245 students from first grade of junior and senior middle school.Correlated variables were made the correlation analysis,regression analysis,constructing the structure equation model and using tracking data to confirm.Results (1) Neuroticism,father's affective warmth and understanding,father's excessive protection,mother's rejection and deny had a direct effect,and the variation of total symptoms could be explained 40.8％ ; father's affective warmth and understanding,father's excessive protection,mother's over-interference and over-protection,mother's rejection and deny had a indirect effect on interpersonal sensitive,and explained 24.0％.(2) Effect analysis showed father's affective warmth and understanding,father's excessive protection,mother's rejection and deny impact on interpersonal sensitive by neuroticism,and father's excessive protection was the largest which accounted for 48.0％ of the total effect.The second was father's affective warmth and understanding,accounting for 47.3 ％.The last was mother's rejection and deny accounted for 42.7％,and its indirect effect increased with the age(69.1％).All of mother's over-interference and overprotection through the neurotic influence interpersonal sensitive,and the direct effect was 50.3％ between neurotic and interpersonal sensitivity.Conclusion Indirect effect of neurotic existed in relationships of parents rearing patterns and interpersonal sensitivity.

Objective To investigate the cytotoxicity of vascular endothelial growth factor (VEGF) siRNA combined with fusion suicide gene yCDglyTK on human gastric cancer cell line in vitro.MethodsThe gastric cancer cell line SGC7901 was transfeeted with blank plasmid pcDNA3.1 (-) null [pcDNA3.1 (-) group], or VEGF-siRNA expression plasmid pGenesil-shVEGF (SGC7901/shVEGF group),or fusion suicide gene plasmid pcDNA3.1 (-)CV-yCDglyTK (SGC7901/CDTK group),or combined gene plasmid pcDNA3.1 (-)shVEGF-yCDglyTK (SGC7901//shVEGF-CDTK group) with calcium phosphate nanoparticles (CPNPs).Un-transfected gastric cells were set as control group.The stable transfected cells were selected by G418.The target gene expression was verified by RT-PCR and Western-blot.After given prodrug 5-fluorocytosine (5-FC), the biologic characters variation, apoptotic morphology and apoptotic rate of cells in each group were observed through cell growth curve by MTT assays, by-stander effect, Hoechst 33258 staining and flow cytometry.The data was analyzed with SPSS 13.0 software and multiple groups’ comparison was analyzed with LSD test.ResultsFour gastric cancer cells lines transfected with different plasmids were successfully established.The expression of gene yCDglyTK was detected both in SGC7901/CDTK cells and SGC7901/shVEGF-CDTK cells.By MTT assays, the cell growth curve indicated that the A570 value of SGC7901/shVEGF cells, SGC7901/CDTK cells and SGC7901/shVEGF-CDTK cells decreased significantly compared with that of SGC7901 and SGC7901/null cells after a 24-hour 5-FC treatment (P＜0.01).When the percentage of stable gene trasfected SGC7901 cells was 60％, 80％and 100％, the cell relative viability was 13.09％±2.40％, 9.74％±2.83％ and 5.68％±1.03％,respectively. A large number of cells in SGC7901/CDTK and SGC7901/shVEGF-CDTK group appeared typical apoptotic morphology under fluorescence microscope.The result of flow cytometry showed that the apoptosis rates in SGC7901/shVEG group、 SGC7901/CDTK group and SGC7901/shVEGF-CDTK group were 16.40％ ±4.68％, 57.63％ ± 4.96％ and 69.07％ ± 4.69％,respectively, and there were significant differences compared with control (P＜0.01).Conclusion VEGF siRNA combined with suicide gene can effectively kill gastric cancer cell line SGC7901.Apoptosis induction may be one of the important mechanisms of killing tumor cells.

Objective To evaluate the diagnostic valve of double balloon enteroscopy in patients with obscure abdominal pain and analyze the etiology of chronic abdominal pain resulted from enteral diseases. Methods Sixty-seven cases with chronic abdominal pain underwent a previous negative gastroscopy, colonoscopy, gastrointestinal barium, B ultrasound and electrocardiogram were received double balloon enteroscopy during June 2005 to June 2008. Results Thirty-six of 67 patients was done by enteroscopy via anus, and 19 cases via oral, and 12 cases via both anus and oral. The lesions were found in 41 of the 67 patients, with overall diagnostic yield of 61.19%. Among 41 cases of abdominal pain resulted from small bowel diseases, Crohn's disease were found in 15 cases (36.59%), non-specific small enteritis in 10 cases (24.39%), tumors in 8 cases (19.51%),other enteral diseases in 8 cases (19.51%). Conclusions Double balloon enteroscopy was a diagnostic modality with a high diagnostic value for obscure abdominal pain resulted from small bowel diseases. The most common causes of obscure abdominal pain were Crohn's disease, non-specific small enteritis and tumors.

Objective To find out the present situation and influence factor in core capabilities of nurses that with blood purification skills in 18 hospitals, and offer reference frame for training. Methods The questionnaires were used to investigate, theresults underwent analysis. Results Among three parts of core capabilities, total score of N1-2 made the highest,the mean score was 236.75,N3 score made the lowest,the mean score was 168.00. The percent of pass in every hierarchy didn't passed 50%. Using the multiple regression to analyze the factor,N1-1 was the work experience in department of nephrology;N3 was the training time of blood purification. Conclusions Percent of pass in core capabilities of nurses of blood purification is in a low level,every hospital should follow the principle of recruitment,and regulate the training of nurses in blood purification.