Epithelial-mesenchymal transition (EMT) is an important biological process in embryonic development and tumori-genesis. In this process, epithelial tumor cells can obtain mesenchymal phenotypes and promote tumor invasion and metastasis. EMT is controlled by multiple transcription factors, signal pathways, and microRNAs. EMT and cancer stem cells are closely related. EMT also promotes the self-renewal ability of tumor cells and the overexpression of EMT-related markers in tumor cells with stemness. Some mi-croRNAs can control EMT process and stemness. In this study, recent developments on EMT and cancer stem cells in tumor metastasis were summarized to provide new insights into target therapy of tumor metastasis and recurrence.

AIM:ToinvestigatetheregulationofmiR-21onFasLexpressionanditseffectonthegrowthand apoptosis in glioma cells , and to evaluate the molecular mechanism .METHODS:Differential expression levels of miR-21 in human glioma U251 cells were achieved by transfecting with miR-21 mimics, miR-21 inhibitor or scramble .The viability and apoptosis of U251 cells were detected by CCK-8 assay and flow cytometry with Annexin V-FITC/PI double staining. The recombination vector pmirGLO-FasL was constructed .Dual-luciferase reporter experiment was performed to validate the target genes of miR-21.The expression vector pcDNA3.1-FasL was also constructed , and the biological activity and regula-tory role of miR-21 in U251 cell apoptosis were analyzed by a restore experiment .RESULTS:Exogenous overexpression of miR-21 increased the viability and decreased the apoptosis of U 251 cells ( P<0.05 ) , while miR-21 inhibitors generated the opposite results (P<0.05).Dual-luciferase reporter assay and restore experiment revealed that miR-21 negatively reg-ulated the expression of FasL gene which was regarded as the target gene , thus decreasing the apoptosis of U 251 cells. CONCLUSION:miR-21 increases the viability of glioma U251 cells, in which FasL may be one of the target genes .

ObjectiveTo investigate the feasibility and influence factors of a new silver salt method for determination of arsenic in drinking water. Methods Arsenic was determined at different reaction temperature,acidity, specification and addition of zinc granular, fill weight of lead acetate cotton, and the effect of these factors on assay results was observed. Arsenic in drinking water was determined in accordance with standard test methods (GB/T 5750.6) of the new silver method. Results The recoveries of the arsenic were 75.3％ - 93.6％(F =9.21,P ＜ 0.01 ) with reaction temperature at 10 - 30 ℃, and the best reaction temperature was 25 ℃. The recoveries of the arsenic ranged from 80.3％ - 91.6％(F =4.67, P＜ 0.05) when sulfuric acid was 3.0 - 6.0 ml and the best value was 5.0 ml. The recoveries of the honeycomb structural zinc granular(diameter 0.2 - 0.3, 0.3 - 0.4 mm) and button zinc granular were 87.2％, 90.7％ and 83.0％, respectively; the best specification was 0.3 - 0.4 mm. The recoveries of zinc granular weight(3 - 5 g ) were 74.6％ - 91.7％, respectively; the best was 5 g. The recoveries ranged from 79.6％ - 91.3％ with fill weight of lead acetate cotton at 25 - 100 mg, the best fill weight was 50 mg.The recoveries of the arsenic were 90.7％, 92.5％, 81.5％ and 74.2％ with lead acetate cotton length at 0.5 - 2.0 cm,and the best loose-tight degree was 1.0 cm. The stability time of arsine solution was 5.0, 4.0, 2.5 h with corresponding temperature at 20, 25, 30 ℃, respectively. ConclusionsIn order to ensure precision and accuracy of the measurement, it is necessary to control reaction temperature, acidity, specification and addition of zinc granular free from arsenic, fill weight of lead acetate cotton and loose-tight degree in the reaction system.

Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Carcinoma, Non-Small-Cell Lung ; diagnostic imaging ; drug therapy ; Female ; Fluorodeoxyglucose F18 ; Humans ; Lung Neoplasms ; diagnostic imaging ; drug therapy ; Male ; Middle Aged ; Positron-Emission Tomography ; Small Cell Lung Carcinoma ; diagnostic imaging ; drug therapy ; Tomography, X-Ray Computed

Objective To study action mechanism of rhamnocitrin in Oxytropis Falcata on enhance the immune function. Methods Kunming mice were randomly divided into blank control group, model group, positive control group, traditional Chinese medicine high, medium, and low dose groups. All treatment groups received gavage with relevant medicine for 10 days. From the 8th day, blank control group received intraperitoneal injection with normal saline, while other groups received intraperitoneal injection with cyclophosphamide for 3 days. Through macrophages carbon clearance test, macrophage phagocytosis of chicken erythrocytes test, and immunosuppressive mice organ index detection, effects of rhamnocitrin in Oxytropis Falcata on nonspecific immune function of immunosuppressive mice were observed. Results Compared with model group and blank control group, traditional Chinese medicine high, medium, and low dose groups could improve the phagocytic activity of immunosuppressive mice, clearance index, and phagocytic coefficient (P<0.05), and increase the organ index of the thymus and spleen. Compared with the positive control group, the efficacy of traditional Chinese medicine high, medium, and low dose groups was low. Conclusion Rhamnocitrin in Oxytropis Falcata can enhance the immune function, improve the formation of spleen cells of mice serum hemolysin of chicken red blood cell immune.

Gastric cancer is the leading cause of death of patients with malignancy and the most common malignancy in China.Stomach is also a secretory organ,thus the carcinogenesis of human stomach always accompanied neuroendocrine differentiation.There is not a explicit definition of neuroendocrine differentiation so far,and the influence of which in gastric patients prognosis is in dispute.With the deep intensive research of gastric adenocarcinoma,diagnosis and treatment in gastric adenocarcinoma with neuroendocrine differentiation becomes increasingly concerned.

Objective To investigate the relationship between nutritional risk and cognitive score in pa-tients with acute stroke .Methods From January 2015 to December 2015, 160 inpatients with acute stroke were observed and divided into two groups according to Nutritional Risk Screening 2002 (NRS 2002) scores.All the patients were on natural diets and did not receive enteral or parenteral nutrition support .Cognitive functions were evaluated using the Mini-Mental State Examination ( MMSE) within 24 hours and 6 months after the acute cere-bral artery diseases .Logistic regression analysis was performed to investigate the effects of nutritional risks on the cognition.Results Totally 145 patients entered the final analysis , among whom 72 had nutritional risks and 73 had no nutritional risks .The average ages of patients with nutritional risks were significantly older than those without nutritional risks [ (67.04 ±8.95) years vs.(63.10 ±9.12) years, P=0.027], along with significantly higher incidence of diabetes (75.0%vs.49.3%, P=0.001).The lesion locations showed no statistically signif-icant difference between two groups ( frontal lobe 24.5%vs.17.5%, P=0.670;parietal lobe and occipital lobe 40.8%vs.26.3%, P=0.398;basal ganglia region 51.0%vs.49.1%, P=0.490;brain stem and cerebellum 53.0%vs.42.1%, P=0.777).Compared to the patients without nutritional risks , the MMSE scores of the pa-tients with nutritional risks were lower within 24 hours, but without statistical significance (27.45 ±2.21 vs. 28.09 ±1.27, P=0.209);however, six-month follow-up showed that the MMSE scores were significantly differ-ent between two groups (24.70 ±2.16 vs.27.43 ±2.32, P=0.036).Univariate Logistic regression analysis was used to evaluate factors associated with cognitive impairment (MMSE<27).NRS 2002, ages, diabetes mellitus history, and body mass index entered in the Logistic regression analysis .In all patients, ages and NRS 2002 had a positive correlation with cognitive impairment (P=0.000, OR=1.156;P=0.004, OR=2.341).Conclusion The cognitive function in stroke patients with nutritional risks is worse than in patients without nutritional risks .

Objective To establish a quantitative biomechanical relationship between the anterior cruciate ligament deficiency and the posterior horn of medial meniscus. Methods 10 human cadaveric knees were examined using an in vitro knee-testing apparatus. In response to a combined 134 N anterior and 200 N axial compressive tibial load, the in situ forces in the posterior horn of medial meniscus were measured. Testing was performed on 10 knees at multiple angles of flexion (30?, 60?, 90?) before and after resection of anterior cruciate ligament. Results The resultant forces on the posterior horn of medial meniscus were as follows: intact ACL knees, (22.8?11.5) N in 30? flexion, (27.1?16.3) N in 60? flexion, (26.7?14.5) N in 90? flexion. ACL deficiency knees, (87.3?43.9) N in 30? flexion, (77.7?43.3) N in 60? flexion, (66.2?40.1) N in 90? flexion. The resultant forces significantly increased as a result of ACL deficiency(P

Objective To determine the effect of antigen on the main immunological reaction route of red blood cells and while blood cells. Methods Cancer cells (5?10~6/ml) and/or Bacillus calmette-Guerin(BCG 0.1mg) or yeast cells(5?10~8/ml) were added into 0.2ml of whole blood cells (or 0.2ml of white blood cells) and 0.3ml of fresh plasma (or 0.3ml of NS) treated by citric acid, and incubated for 1h at 37℃. IL-8 level was measured by ELASA. The data could be divided into 4 groups. (1) 0.2ml of antigen (cancer cells or yeast cells or BCG) was added to 0.2ml of whole blood cells and 0.3m plasma. ②0.2ml of NS was added to 0.2ml of whole blood cells and 0.3ml of plasma. ③ 0.2ml of antigen was added to 0.2ml of white blood cells and 0.3ml of plasma. ④ 0.2ml of NS was added to 0.2ml of white blood cells and 0.3ml of plasma. Results Cancer cells, BCG and yeast cells could activate immunological reaction in blood, but could not activate immunological reaction of white blood cells in no plasma group with addition of antigen. The activation Index (2.124?0.860) of IL-8 in the group with addition of whole blood cells and plasma was significantly higher than that (0.390?0.08) in the group with addition of antigen, white blood cells and plasma (P

[Summary] From February 2008 to June 2008, two cases of old ectopic pregnancy were misdiagnosed: Case 1 was misdiagnosed as gestational trophoblastic disease (GTD), and Case 2 was misdiagnosed as cornual pregnancy.In order to further confirm the diagnosis, two cases were all given laparoscopic exploration.Surgery confirmed interstitial chronic ectopic pregnancy, leading to a resection of the fallopian tubes and mass lesions.Embryo tissue was pathologically confirmed postoperatively.The diagnosis of old ectopic pregnancy is difficult.Serum hCG determination is often found no positive, and ultrasound examination has no specificity.The clinical images are varied.Detailed medical history inquiry and attention to differential diagnosis are key for the diagnosis of old ectopic pregnancy.