Dendritic cells (DCs) are the important auxiliary cells in tumor vaccines to activate antitumor immunity.Suppressor of cytokine signaling 1 ( SOCS1 ) has been shown to play an important role in inhibition of cytokine signal transduction.Recent studies show that inhibition of the function of SOCS1 in DCs plays a critical role in strongly enhancing tumor vaccines antitumor activity,and in the methods of restraining SOCS1 's function have also made significant progress.

Objective To determine the cleaning and the shortest disinfectant time for gastroscope Methods 1? g/ml HBsAg and 3? 108/ml bacteria of Aureus Staphylococci(ATCC 6538),Escherichia coli(ATTC 8099),Bacterium earuginosum(ATCC 27853)were artificially spreaded on the body of gastroscope ,biopsy hole and biopsy clamp.The gastroscope was routinely cleaned and disinfected.HBsAg and pathogens in the samples,which collected before and after cleaning the gastroscope and 3min,5min,10min after disinfection,were tested by using ELISA and bacteria culture,respectively.Results Pathogen and HBsAg can be detected before cleaning the gastroscope.Pathogen can also be detected,but HBsAg disappears after cleaning.Both HBsAg and pathogen was negative 3 min after gastroscope was immersed in glutaraldehyde.Conclusion The tests for pathogens and HBsAg can be negative after gastroscope was cleaned and immersed in 2％ glutaraldehyde for 3 min.

Objective To observe the diagnostic value of Omeprazole (Losec) test in gastro-esophageal reflux disease. Methods According to clinical manifestations and results of esophageal 24 h pH monitoring and gastro-esophageal endoscopy, 152 patients with reflux symptoms (123 GERD, 29 non-GERD) were randomly, double-blindly divided into group A (Omeprazole 20 mg/d for 1 week), group B(Omeprazole 40 mg/d for 2 weeks), and group C (placebo at the first week, Omeprazole 40 mg/d at the 2 nd week). Symptom score from heartburn, acid regurgitation, food regurgitation, and substernal pain, was recorded before and after taking Omeprazole or placebo. Results After taking Omeprazole 1 week, the symptom score decreasing from GERD patients of group A, B and C was 5.0?4.8、4.9?4.6、2.3?4.0 respectively, score decreasing 2 was the best critical value for GERD diagnosis. There was no difference between Omeprazole 20 mg/d and 40 mg/d for 1 week, the results showed that Omeprazole test (20 mg/d for 1 week) has the best diagnostic value for GERD, the diagnostic sensitivity was 82.5%, specificity was 40.1%, coincident rate was 76.7%. Conclusion Omeprazole test is reliable for GERD diagnosis.

Objective: To design and confirm the cleavage activity of ribozyme Rz217 to oncogene ki-rasG12V messenger RNA and search for a new method for gene therapy targeting oncogene ki-ras. Methods: According to Symon' s principle,design an ribozyme specific for ki-rasc12v mRNA, both the constructs for transcription in vitro of ribozyme Rz217 and ki-ras exonl and the mammalian expression constructs of ribozyme Rz217 were constructed by DNA recombinant technique,ribozyme Rz217 and ki-ras exonl mRNA was obtained by transcription in vitro with T7 and SP6 RNA polymerase. Pancre atic carcinoma cell line PaTu8988 and human hepatocellular carcinomacell line BEL7404 were transfected with Rz217 mammalian expression constructs and the level of endogenous ki-rasG12V mRNA or ki-ras mRNA was determined by semiquantitative RT-PCR. Results: Not only in vitro but also in vivo, ribozyme Rz217 can cleave the mRNA of oncogene ki-ras (G12V) in site-specific manner and can not cleave the mRNA of wild-type ki-ras. Conclusion: Ribozyme Rz217 can cleave oncogene ki-rasc12v mRNA and the cleveage is specific for ki-rasG12V mRNA.

Objective To study the influence of different dialysis frequence on infection and prognosis of maintenance hemedialysis patients. Methods Fifty-three maintenance hemodialysis patients with chronic kidney disease were divided into 3 groups. Groups A, B, C dialysed thrice per week (19 cases),twice per week (15 cases) and thrice per two weeks (19 cases), respectively. All the patients were dialysed for 1 year. The rate of infection, death number and death reason were recorded. Results All the cases were infected 62 times (17 times in group A, 18 times in group B and 27 times in group C). Pulmonary infection,blood vessels infection, urinary tract infection and digestive tract infection happened 35 times(56.45% ), 14 times (22.58%), 8 times (12.90%) and 5 times (8.06%) respectively. Eight cases died in three groups,and the total death rate was 15.09%, with 1 case in group A,1 case in group B and 6 cases in group C.There was significant difference in prognosis among three groups (χ2 =6.293,P <0.05). Conclusions Patients who dialysis less than twice per week have higher rate of infection and death. Dialysis program should be adjusted and dialysis frequence should be increased.

Objective To study the effects and safety of levocarnitine and shuxuetong in treatment of the patients with chronic renal failure.Methods 94 patients with chronic renal failure were selected as research object,and they were randomly divided into group A(levocarnitine and shuxuetong group) 47 cases and group B(shuxuetong group) 47 cases.Group A were treated with levocarnitine oral solution and shuxuetong,and group B were treated with shuxuetong,then the percentage of effectiveness,incidence of adverse reactions of group A and group B and serum BUN,Scr,Hcy were analyzed.Results The percentage of effectiveness of group A was higher than that of group B,but the incidence of adverse reactions of the two groups had no difference,and the serum BUN,Scr,Hcy of group A and group B before the treatment had no differences(P＞0.05),those of group A and group B after treatment were compared there were significant differences(all P＜0.05).Conclusion The effects of levocarnitine oral solution and shuxuetong in treatment of patients with chronic renal failure were better.

Objective To investigate the reliability of extravascular lung water index (EVLWI) and pulmonary vascular permeability index (PVPI) in assessing the severity of acute respiratory distress syndrome (ARDS) in critically ill patients.Methods Forty-six patients with ARDS,who were admitted in our emergency intensive care unit,aged 18-72 yr,weighing 46-72 kg,of Acute Physiology and Chronic Health Evaluation Ⅱ score 11-25,were divided into 3 groups:PaO2/FiO2 ≤ 100 mmHg severe group (n =16);100 mmHg ＜PaO2/FiO2 ≤ 200 mmHg moderate group (n =14);200 mmHg ＜PaO2/FiO2 ≤ 300 mmHg mild group (n=16).Before treatment,and at 24 and 72 h after diagnosis of ARDS,PVPI,EVLWI,cardiac index (CI),and intrathoracic blood volume index (ITBVI) were measured,and blood gas analysis was performed.PaO2/FiO2 was calculated.The 28 day fatality after admission to hospital was recorded.Person correlation of PVPI and EVLWI with PaO2/FiO2,ITBVI and CI was analyzed.Results The PVPI,EVLWI and fatality rate were significantly higher at each time point in moderate group and severe group than in mild group,and in severe group than in moderate group (P＜0.05).The correlation coefficient between PVPI and PaO2/FiO2 was 0.778,and between EVLWI and PaO2/FiO2 was-0.437 (P＜0.05).There was no correlation between CI and ITBVI (P＞0.05).The correlation coefficient between EVLWI and PaO2/FiO2 was-0.448,and between EVLWI and ITBVI was 0.347 (P＜0.05).There was no significant difference between the correlation coefficient between PVPI and PaO2/FiO2 and the correlation coefficient between EVLWI and PaO2/FiO2 (P＜0.05).Conclusion PVPI and EVLWI both can assess the severity of ARDS in critically ill patients,showing a consistent reliability.

ObjectiveTo explore the association between hepatic steatosis and the liver tissue expression of HBsAg and HBcAg in chronic hepatitis B (CHB) patients.MethodsFrom January 2005 to June 2008,a total of 147 CHB patients with hepatic steatosis diagnosed by liver biopsy and other 149 CHB patients without hepatic steatosis but with similar HBV DNA titer were enrolled.The differences of HBsAg and HBcAg immunostaining and liver injury in these two groups were compared.The data were analysed using t test and chi square test.ResultsCompared with non-steatosis group,the average age and body weight index of hepatic steatosis group were higher (t values were -3.31and -6.57,both P＜0.01).The percentage of moderate to severe hepatic inflammation in liver,obvious hepatic fibrosis and the strong positive HBsAg staining was lower (30.6％ vs 15.4％ ； 26.5％vs 12.8％； 23.1 ％ vs 6.7 ％； x2=9.63,8.92,15.76； all P＜0.01),and the percentage of strong positive HBcAg staining was also in downtrend.Compared with degree F1 and F2 of liver steatosis,the percentage of HBsAg and HBcAg strong positive staining in liver tissues of degree F3 and F4 was in downtrend.ConclusionsHepatic steatosis affected the expression of HBsAg and HBcAg in liver tissue of CHB patients.As hepatic steatosis appeared and became more severe,both expression of HBsAg and HBcAg and the degree of liver injury were in downtrend.

Objective To detect the level of serum fragmented cytokeratin 18 (CK-18 M30) in patients with nonalcoholic steatohepatitis (NASH), to explore the relationship between the expression of CK-18 M30 and NASH. Methods 33 healthy people as control group, 24 nonalcoholic simple fatty liver (NAFL) patients, and 21 NASH patients were included in this study. CK-18 M30, ALT, AST and GGT were detected in all patients’ vein blood. NAFLD activity points (NAS) was examined in biopsy specimens of NAFL patients and NASH patients. Pearson correlation was applied to analyze the correlations between serum CK-18 M30, ALT, AST, GGT and the NAS of liver tissue in NASH group. Results Serum CK-18 M30 level of healthy control, NAFL and NASH group were (96.557 2 ± 41.226 8)U/L, (104.321 7 ± 45.167 3)U/L, (263.125 5 ± 61.578 1)U/L respectively. Serum CK-18 M30 level in NASH patients positively correlated with both NAS of liver tissue and serum ALT, which correlation coefficient r values were 0.601 5 and 0.420 6. Conclusion The concentration of serum CK-18 M30 could be used as a marker in the diagnosis of NASH.

Aim Toinvestigatethepro-angiogenic effects of Danshensu derivative ADTM and explore its underlying possible signaling pathway using zebrafish embryosasinvivomodels.Methods Theangiogenesis activities of ADTM were determined in experimental models of normal and VEGFR tyrosine kinase inhibitorⅡ(VRI )-induced vascular defective zebrafish embry-os.Embryos were treated with various concentrations (50,100,200 μmol · L-1 ) of ADTM for indicated time.The diameter and the numbers of endothelial cells of zebrafish SIVs were evaluated,respectively.In VRI model,the number of intact and defective ISVs in each zebrafish embryo was counted.The total RNA of zebrafish embryos was extracted and transcriptional profiling was analyzed by deep sequencing.Quantita-tive real-time PCR(qPCR)was performed to 4 genes selected from transcriptional profiling to validate the data collected from transcriptome analysis.Results ADTMsignificantlyincreasedsubintestinalvessels (SIVs)diameter in a concentration-dependent manner in normal zebrafish as well as restored VRI-induced blood vessels defect in VRI-exposed zebrafish. The transcriptome data analysis demonstrated that 19 signif-icantly changed genes were mapped to insulin signaling pathway.The qPCR data are in good agreement with those obtained by deep sequencing and support the consistency between the two methods for determining relative expression levels in the zebrafish model.Con-clusion Inzebrafishmodel,ADTMexhibitsthe effects of angiogenesis and blood vessel restoration. The underlying mechanism may be involved in the acti-vation of insulin signaling pathway.