Autophagy is a catabolic process involving the degradation of a cell's own proteins and organelles and the subsequent recycle of cellular products. Despite the fact that autophagy helps maintain survival, excessive autophagy can lead to autophagic cell death. Recent researches showed that autophagy played an important role in the development, progression and treatment of colorectal cancer;however, the exact mechanisms of autophagy and its effect on chemotherapy and radiotherapy are still under debate.

Few studies of cetuximab on patients with gastric and esophageal cancer were available now.The disease control rate was 72.7%～92%,OS was 9.5～16.6months,PFS/was 6.2～11 months among first-line setting with cetuximab-contained regimens.And cetuximab shown in second-line regimen setting overcome the resistance of irinotecan and docetaxel.The pCR was 13%～65% when cetuximab was used as induction treatment combined with concurrent chemoradiation.18F-FDG-PET was a potential method to predictthe efficacy of cetuximab-contained regimens,however,status of Kras gene had no predictive value.

AIM　To study the inhibitory effects of indomethacin and meloxicam on NF-κB from lipopolysaccharide (LPS) stimulated peritoneal macrophages of mice. METHODS　NF-κB was measured with the method of electrophoretic mobility shift assay (EMSA). RESULTS　After induction by LPS at the concentrations of 1 and 3 μg.mL-1, the NF-κB content of the mouse peritoneal macrophages increased markedly. Indomethacin and meloxicam, at the concentrations of 10-7-10-5 mol.L-1, decreased the activation of NF-κB at the concentrations of 1 and 3 μg.mL-1 in activated mouse peritoneal macrophages induced with LPS at the concentrations of 1 and 3 μg.mL-1. CONCLUSION　The inhibitory effects of indomethacin and meloxicam on NF-κB activation may be one of their mechanisms of antiinflammatory actions.

The energy for tumor cells mainly derives from the aerobic glycolysis,that is,the Warburg effect,which also provides a large amount of precursor substances for the growth of tumor cells.Hexokinase-Ⅱ (HK-Ⅱ),highly expressed in tumor tissue,is the rate-limiting enzyme of glycolysis and closely related to the energy metabolism of tumor.Recent studies have showed that HK-Ⅱ not only mediates Warburg effect,but also promotes tumor proliferation by inhibiting tumor cell apoptosis and regulating autophagy.It has been confirmed that blocking HK-Ⅱ gene expression and inhibiting HK-Ⅱ with small molecule inhibitor can kill tumor cells in many kinds of cancer.Agent targeting HK-Ⅱ may become a new generation of targeted drugs.

Objective To establish criteria for determination of sputum retention in elderly patients with non-ar-tificial airway. Methods Interview and Delphi methods were used to preliminarily determine clinical indication of sputum retentionand its classification through two-round expert consultation among 25 experts. Final criteria for de-termination of sputum retention were determined through experts group discussion. Results During the two rounds of consultation,all the questionnaires were collected,the experts' authority coefficients were 0.936 and 0.926 respec-tively,and the coordination coefficient of expert opinion was statistically significant.Criteria for determination of spu-tum retention included ineffective cough plus auscultation phlegm sound,with or without complaining of sputum,de-creased blood oxygen saturation,difficulty breathing and cyanosis. Conclusion Based on expert consultation and ar-gument,the criteria for determination of sputum retention can facilitate clinical nurses to detect sputum retention.

Objective To study the expression and signiifcance of phospholipid transfer protein (PLTP) and macrophage migration inhibitory factor (MIF) in mice with bronchopulmonary dysplasia (BPD). Methods Ninety-six 4-day-old mice were randomly divided into oxygen group and air group. Mice in oxygen group were exposed to a FiO2 of 65%, and mice in air group were exposed to air. On day 7, 14, 21 and 28, blood and lung tissue samples from 12 randomly selected mice in each group were obtained. The serum levels of MIF and PLTP were measured by ELISA assay. The morphological changes of lung tissue were ob-served with HE staining. Results The mice in oxygen group showed thickened lung parenchyma and obvious pulmonary ifbrosis. The radioactive alveolar count was signiifcantly lower in oxygen group than that in air group (P<0.01). PLTP level in air group was increased gradually from day 7 to day 21, and began to decrease on day 28. PLTP level in oxygen group was increased from day 7 to day 14, and decreased on day 21 and day 28. MIF level in air group did not change during the experiment. MIF level in oxygen group was signiifcantly increased from day 7 to day 21, and began to decrease on day 28. Conclusions MIF and PLTP may be good biomarkers for the diagnosis of BPD.

OBJECTIVE To probe the pathogen′s distribution of ventilator-associated pneumonia(VAP),in order to offer the evidence of clinical therapy,prevent the onset of VAP and apply the antibiotics reasonably.METHODS We applied the methods of etiology,microscopic identification,bacteria culturing etc on 74 mechanical ventilation patients,and analyzed the etiology of early-onset and late-onset VAP in contrast.RESULTS Totally 121 pathogens were cultivated altogether in all 74 VAP patients.In the 36 pathogens which were cultivated from 29 early-onset VAP patients,there were 66.67% of simple culture(24 patients,24 strains) and 33.33% of co-culture(5 patients,12 strains),and in the 85 pathogens which were cultivated from 45 late-onset VAP patients there were 17.64% of simple culture(15 patients,15 strains) and 82.35% of co-culture(30 patients,70 strains).The proportion of co-culture in the late-onset VAP patients was prominantly higher than that in the early-onset ones(?2=27.821,P

Objective To probe into the optimization of scanning parameters of chest with low-dose spiral CT.Methods The phantom was scanned with different scanning parameters.The image quality obtained with the standard dose parameters and the low-dose technique were compared to evaluate the spatial resolution,low contrast resolution,noise level field uniformity and radiation dose,then the optimal scan parameters were defined.The scanning parameters were 120 kV,0.75 s,Pitch 1.0,FOV 360,RF3 reconstruction model(standard filter).Different thickness and tube electricity were used and the data were analyzed with the statistical method.Results There was significant difference about the data of the CTDI between the 160 mA conventional spiral CT and the low dose groups(30 mA,50 mA,70 mA,90 mA).There was no significant difference about the CTDI between 30 mA and 50 mA,and between 50 mA and 70 mA.There was obviously significant difference about the image noise on 1 mm slice and 10mA with other groups.The spatial resolution and low contrast resolution increased along with the increase of tube electricity,and 50mA was a inflexion of low contrast resolution.Conclusion 50mA and 5mm slice are the best scanning parameters in low-dose lung scanning and adapt to routine screening and early lung cancer screening.

Background:Recently,cancer stem cells( CSCs)has become a hot topic in cancer research. For this research topic,the primary problem is the isolation and identification of CSCs,and suspension culture is considered to be an important method for CSCs isolation. Aims:To study the isolation and identification of gastric cancer stem cells( GCSCs) and evaluate its stemness characteristics. Methods:GCSCs-like cells were enriched through spheroid formation by suspending the human gastric cancer cell lines MKN45,MGC803 and SGC7901 in serum-free medium containing epidermal growth factor( EGF)and basic fibroblast growth factor( bFGF). The third generation tumor spheres obtained were tested for the ability of colony forming;its stemness markers were identified by immunofluorescent staining,and migration and invasion capabilities were assessed by wound scratch test and Transwell assay,respectively. Growth inhibition of tumor spheres in response to cisplatin was assessed by CCK-8 assay. Results:High expressions of stem cell markers CD44 and CD54 were observed in the tumor spheres,but gastric parietal cell marker H+ /K+-ATPase was lowly expressed. Compared with parental gastric cancer cells,tumor spheres had stronger colony forming ability(P<0. 05);Furthermore,healing of wound scratch was accelerated(P<0. 05),and number of invasive cells in Transwell chamber was increased in tumor spheres(P<0. 05). The 50% inhibition concentration of cisplatin to tumor spheres increased significantly when compared with parental gastric cancer cells. Conclusions:GCSCs enriched tumor spheres can be obtained by suspension culture with serum-free medium. The tumor spheres possess enhanced capabilities of self-renewal,proliferation,migration,invasion and potential of multilineage differentiation;meanwhile,it is more resistant to chemotherapy.

Objective To investigate the correlation between serum homocysteine (HCY) and chronic heart failure (CHF) hypercoagulable state in patients.Methods A total of 105 cases of patients with CHF was divided into three groups according to the New York Heart Association (NYHA) classification standard functions:heart functional grade Ⅱ group (42cases),cardiac function grade Ⅲ group (35 cases) and,NYHA class Ⅳ group (28cases).At the same time,40 healthy individuals were regard as the control group.HCY,fibrinogen (Fbg),D-dimer (DDI),HCY,N-terminal pro-brain natriuretic peptide (NT-proBNP) were detected by fasting venous blood samples which were collected within 24 hours after admission.Results Compared to the control group,the expression of Fbg,DDI,HCY and NT-proBNP increased,whereas,antithrombin Ⅲ (AT-Ⅲ) was reduced.Fbg,DDI,HCY,NT-proBNP,and AT-Ⅲ were found in all patient cases.Four groups were compared with each other,except for cardiac function Ⅱ group and the normal group had no significant difference between them (P ＞ 0.05),the difference between both other groups was significantly different (P ＜ 0.05),HCY had a positive correlation with Fbg,DDI,and NT-proBNP (r =0.268,0.295,and 0.404,P ＜ 0.05),and negative correlation with AT-Ⅲ (r =-0.240,P ＜ 0.05).Conclusions HCY might be a reliable indicator as a judge of CHF patients with hypercoagulable state,to detect HCY,FBG,DDI,and AT-Ⅲ in CHF patients.It benefits for judging thrombosis risk and determining the severity of the diseases.Anticoagulant therapy might be beneficial to reduce the long-term adverse events.