Objective To investigate the effects of T-2 toxin on testosterone biosynthesis in primary cultured Leydig cell derived from the mouse testis.Methods Leydig cells isolated from Kunming male mice were adjusted to 5?105/ml and the purity was identified by the modified 3?-hydroxysteroid dehydrogenase(HSD) staining method.Blank control group(treated with 0 ng/ml hCG and 0 mol/L T-2 toxin),inductive control group(treated with 10 ng/ml hCG and 0 mol/L T-2 toxin),low dose T-2 toxin exposure group(treated with 10 ng/ml hCG and 10-9 mol/L T-2 toxin),middle dose T-2 toxin exposure group(treated with 10 ng/ml hCG and 10-8 mol/L T-2 toxin) and high dose T-2 toxin exposure group(treated with 10 ng/ml hCG and 10-7 mol/L T-2 toxin) were designed,respectively.The testosterone level was measured after 24 h of incubation.Results After 24 hours culture in liquid medium contained serum,the fresh isolated Leydig cells grew well and the purity exceeded 90%.Through 10 ng/ml hCG induce,the testosterone level of Legdig cells increased significantly and the difference compared to blank control was of statistical sense(P

Objective To treat complex fractures of the proximal tibia with the hybrid external fixation and internal fixation and to evaluate their efficiency. Methods During January 2000 to January 2005, 69 patients with complex proximal tibia fractures received operation in our hospital, which included Schatzker types Ⅳ(17 cases), Ⅴ(14 cases) and Ⅵ(9 cases) and AO A3 type 27 cases, and 2 amputation. The average age was 39 years(range from 18 to 74 years). Among them, 19 open fractures and 21 closed fractures were operated with hybrid external skeleton fixation(HESF) combined limited internal fixation, the others were treated by open reduction and internal fixation (ORIF). Results All the patients were followed from 6 months to 5 years(mean, 25 months), in the HESF group the average time of operation was 2.66 h, the bleeding in operation was 170.50 ml, while ORIF group was 3.33 h and 285.19 ml, the amount healing time of HESF group was 16.40 weeks, while the ORIF groups was 12.37 weeks; there were no deep infectious and skin necrosis patients in the HESF group. According to the HSS score system, there were excellent 31, good 5, fair 3 and bad 1 case, the rate of excellent and good was 90%. In the ORIF group, there were 1 deep infectious and 2 skin necrosis patients, 6 cases were malunion, 2 cases were nonunion. There were excellent 5, good 12, fair 7, bad 3 cases, the rate of excellent and good was 63%; and there were significantly difference between the two groups(u=219, P

The truncated binary exponential back-off algorithm is one of the most effective methods applied in collision resolution process of random multi-access channel. In this study, two new strategies are presented to improve the capability of the truncated binary exponential back-off algorithm. In the new strategies, the sizes of the initial window size or the operating window sizes are adjusted dynamically, which always bring a significant improvement for the self-adaptability of the original algorithm. A series of experiments are simulated and the results verify that the new strategies can make the implementation more stable and effective than the original algorithm.

OBJECTIVEWe aim to evaluate the cytotoxicity and antibacterial effects of Silagum-Comfort (SLC) silicone-based soft liner varnish containing Ag/TiO2 in vitro.

METHODSSilicone-based liner circular specimens, with a diameter of 10 mm and a thickness of 2 mm, were created and divided into six groups randomly. Ag/TiO2 was incorporated into the SLC varnish based on the agent/material weight rate of 0, 0.5%, 1.0%, 1.5%, 2.0%, and 2.5%. The mixed varnish was used to polish the SLC specimens. Antibacterial specimens (ATSLC) were created. Methyl thiazolyl diphenyl-tetrazolium bromide assay method was used to evaluate the 3T3 cell cytotoxicity of ATSLC in vitro. Surface roughness (Ra) measurements of ATSLC were obtained. The antibacterial effect of ATSLC on Candida albicans was examined using the pelliclesticking method.

RESULTSThe cytotoxicity of ATSLC was graded from 0 to 2. The Ra of ATSLC increased when Ag/TiO2 agent concentration increased. However, the differences were not statistically significant compared with the 0 group. With increasing Ag/TiO2 concentration, the antibacterial agent concentration and the antibacterial rate of ATSLC also increased. When the Ag/TiO2 antibacterial agent concentration reached 2.0% and 2.5%, the antibacterial rate increased to 97.5% and 96.5, respectively.

CONCLUSIONVarnish containing Ag/TiO2 has excellent antibacterial effect and can significantly improve the antibacterial effect of silicone-based soft liner.

Objective To explore the activity of Elemene for glioma cell from the cellular and molecular level. Methods The human glioma cell U251 was cultured. The effect of Elemene for human glioma cell proliferation was studied by MTT assay. Cell cycle, Fas, PCNA, bcl-2, intracellular Ca~(2+) and apoptosis were evaluated by flow cytometry analysis. Results Elemene exhibited antiproliferative effect on human glioma cell U251 markedly. The fifty percent inhibition on concentration (IC_(50)) of Elemene against glioma cells at different time points. 24 h was 40.60 μg/ml, the 48 h 38.14 μg/ml and the 72 h 34.35 μg/ml.Cell cycle was blocked in the S and G_2/M phases. The apoptosis ratio was increased by Annexin V staining markedly. Elemene decreased the gene expressions of PCNA and Fas, increased the intracellular Ca~(2+). There was no significant effect on the bcl -2 gene expression. Conclusion Elemene exhibits a marked antiproliferative effect on glioma cells and induces apoptosis by decreasing the expression of PCNA and increasing intracellular Ca~(2+). It also influences the expression of Fas. It might have no relationship with bcl-2 gene expression.

Objective To explore the clinical efficacy of three dimensional (3D) laparoscopic sleeve gastrectomy (LSG) in the treatment of obesity combined with type 2 diabetes mellitus.Methods The retrospective cross-sectional study was conducted.The clinical data of 28 patients with obesity combined with type 2 diabetes mellitus who were admitted to the Qinghai Red Cross Hospital between January 2013 and April 2016 were collected.All the patients underwent 3D LSG.Observation indicators:(1) surgical and postoperative recovery situations;(2) follow-up and metabolic indexes changes.Follow-up using outpatient examination and telephone interview was performed to detect complications of patients after discharge and usages of antidiabetic drugs or insulin up to February 2017.Body mass,body mass index (BMI),hemoglobin (Hb),albumin (Alb),fasting serum C-peptide,fasting blood sugar,2-hours postprandial blood glucose (2HPBG) and glycosylated hemoglobin (GHb) were detected at month 1,3,6 and 12 postoperatively.Measurement data with normal distribution were represented as (x)±s.Repeated measurement data were analyzed by the repeated measures ANOVA.Count data were evaluated by the proportion.Results (1) Surgical and postoperative recovery situations:28 patients underwent successful 3D LSG,without conversion to open surgery.Operation time,volume of intraoperative blood loss,time of postoperative gastrointestinal function recovery and time of postoperative drainage tube removal were (133 ± 20) minutes,(45 ± 22) mL,(2.5 ± 1.2) days and (3.4 ± 0.9) days,respectively.There were no postoperative complications and perioperative death.Duration of hospital stay was (7.1 ± 1.5) days.(2) Follow-up and metabolic indexes changes:28 patients were followed up for 6-12 months,with a median time of 8 months.During the follow-up,there was no death or severe complications.Body mass,BMI,Hb,Alb,fasting serum C-peptide,fasting blood sugar,2HPBG and GHb from pre-operation to month 1,3,6 and 12 post-operatively were decreased from (113±26) kg to (78± 14) kg,from (44±6) kg/m2 to (35±5) kg/m2,from (157±19) g/L to (140±13) g/L,from (43±5)g/L to (40±4)g/L,from (2.50±0.37) μg/L to (1.20±0.33) μg/L,from (10.5±2.0)mmol/L to (5.6±0.5)mmol/L,from (16.3±3.1)mmol/L to (7.9±0.9) mmol/L,from 9.2％± 0.9％ to 6.8％ ±0.6％ with statistically significant differences between preoperative and postoperative indicators (F=396.47,328.20,111.10,21.28,161.06,127.80,243.40,234.64,P＜0.05),and showing a downward trend.Of 28 patients,25 had complete remission of type 2 diabetes mellitus at 12 months postoperatively and 3 had partial remission,with an effective rate of 100.0％ (28/28).The excess weight loss was 63％± 16％.Conclusion 3D LSG is safe and effective in the treatment of obesity combined with type 2 diabetes mellitus,with a good shortterm outcome.

Objective To investigate the risk factors of severe intrahepatic cholestasis during early period after liver transplantation.Methods The clinical data of 225 patients who received orthotopic liver transplantation at the Nanfang Hospital of Southern Medical University from August 2004 to February 2011 were retrospectively analyzed.All patients were divided into positive group (60 patients with intrahepatic cholestasis) and negative group (165 patients without intrahepatic cholestasis).Preoperative,intraoperative and postoperative factors of the 2 groups were compared via t test,chi-square test,Wilcoxon test or Logistic regression analysis.Results The proportion of patients with hepatic cirrhosis,hepatic encephalopathy integral,ascites integral,international normalized ratio,and the levels of prothrombin time (PT),total bilirubin (TBil),aspartate aminotransferase of the positive group before operation were significantly higher than those in the negative group (x2 =6.09,Z =2.22,2.60,2.46,2.84,4.81,3.42,P ＜ 0.05),while the levels of albumin,Na +,K +,hemoglobin,platelet (PLT) of the positive group in the operation were significantly higher than those in the negative group (t =2.10,4.97,Z =2.49,t =3.51,Z =3.66,P ＜ 0.05).The ratio of compatible blood type of the donors and recipients,ratio of fatty liver graft,cold ischemia time,relative warm ischemia time,intraoperative blood loss,intraoperative transfusion of red blood cells,PLT,and cryoprecipitate of the positive group after the operation were significantly higher than those in the negative group (x2 =4.29,13.11,Z =2.45,2.61,3.75,3.20,2.89,3.95,P ＜0.05).The incidences of acute rejection,hepatic artery embolism,pulmonary infection,bacteraemia,fungal infection and cytomegalovirus (CMV) infection were significantly higher than those in the negative group (x2 =9.87,4.91,8.21,6.29,3.92,9.26,P ＜0.05).The results of multivariate analysis revealed that preoperative level of TBil ＞ 51.3 μmol/L,fatty of the liver graft,intraoperative transfusion of cryoprecipitate,postoperative acute rejection,hepatic artery embolism,postoperative pulmonary infection,bacteraemia,CMV infection were independent risk factors of severe inrahepatic cholestasis (OR =15.82,7.99,2.88,3.03,53.20,3.34,4.11,3.22,P ＜ 0.05).The incidence of severe intrahepatic cholestasis was significantly lower in patients with higher level of PLT and longer PT (OR =0.33,0.25,P ＜ 0.05).The mortality rates of the positive group and negative group at 6 months after the operation were 41.7％ (25/60) and 19.4％ (32/165),and the mortality rate of the positive group was significantly higher (x2 =11.54,P ＜ 0.05).Conclusion Correction of poor clinical status before liver transplantation,reinforcement of infection control and anti-rejection may reduce the incidences of complications and decrease the associated early mortality.

OBJECTIVE:To establish a pharmacy online to offline (O2O) platform service quality evaluation model,and to provide reference for platform operators to improve the service quality. METHODS:Using SERVQUAL scale,combining the situa-tion of pharmacy O2O platform development in China,the reliability,safety and aspects of O2O platform were analyzed to sum up primary evaluation index of pharmacy O2O platform service quality. Based on this,the expert interviews questionnaire was de-signed. According to the questionnaire results,indicators were modified and empowered to construct the pharmacy O2O platform service quality evaluation model;the reliability and validity of model were validated. RESULTS & CONCLUSIONS:According to the connotations of each dimension analysis in the SERVQUAL scale and expert interview results of pharmacy O2O platform ser-vice quality,pharmacy O2O platform service quality evaluation model is constructed,including five indicators as“reliability”“se-curity”,and 18 secondary indexes as the“number of platform pharmacy”“pharmacy qualification show”“pharmacy type”. The re-sults of model index reliability and validity verification show that model construction is reasonable and can provide reference for platform operators improving service quality. Follow-up research should give full consideration to the Chinese consumer behavior habits,personal preferences and other factors to build more suitable pharmacy O2O platform service quality evaluation model in China.

BACKGROUND:The incidence of open fracture of the elbow joint is increased rapidly with an increased number of accidents. Fractures are often accompanied by severe soft tissue injuries. At present, a combined therapy of autologous skin grafting, vacuum sealing drainage and external fixation for the treatment of open fractures has been widely reported. OBJECTIVE:To investigate the characteristics of the combined therapy of autologous skin grafting, vacuum sealing drainage, and external fixation for repair of complex and severe open fracture of the elbow joint. METHODS:A total of 41 patients with complex and severe open fracture of the elbow joint who received the combined therapy of autologous skin grafting, vacuum sealing drainage and external fixation during January 2009 to December 2013 in General Hospital of Tianjin Medical University, China were selected. Al patients were treated with routine debridement, external fixation and vacuum sealing drainage to cover wound during the first period. During the second period, autologous skin grafting or flap transfer was used to repair wound when the fresh granulation tissue covered the wound. RESULTS AND CONCLUSION:The postoperative folow-up period of these 41 patients was 8-22 months, with an average period of 13 months. External fixation period was 8-13 months with an average period of 9.8 months. The open wounds were completely healed after autologous skin grafting or skin flaps transfer. Fractures were healed in 31 patients during the first period. There were 7 cases of delayed union, 3 cases of nonunion. Al fractures were completely healed during 8-12 months after iliac bone grafting. The excelent and good rate of limb function recovery was 73.1% among 41 patients with severe open fracture of the elbow joint. The limb function of Gustilo II patients better recovered. These results suggest that the clinical effect of the combined therapy of autologous skin grafting, vacuum sealing drainage and external fixation for the treatment of complex and severe open fractures of the elbow joint is satisfactory.

OBJECTIVETo compare shear bond strength (SBS) between two types of silicone soft liner and polymethyl methacrylate (PMMA) under the condition of heat curing and room temperature curing.

METHODSA total of 48 PMMA specimens (50 mm x 10 mm x 3 mm) were made by water-bath heating method, and randomly divided into four groups. By using Ufi Gel P (UGP) as soft liner material, group A1 was prepared under heat curing, and group A2 was prepared under room temperature curing. To form the other two groups, Silagum-Comfort (SLC) as soft-liner material was used. Group B1 was prepared under heat curing, and group B2 was prepared under room temperature curing. Shear bond strength (SBS) was tested by using the electronic universal testing machine. The adhesives layer and surface of silastic and PMMA were observed by optical microscope and scanning electron microscopy (SEM).

RESULTSThe SBS of groups A1, A2, B1, B2 were (2.39 +/- 0.24), (1.74 +/- 0.27), (3.09 +/- 0.26), and (2.21 +/- 0.29) MPa, respectively. Significant differences were found between A1 and A2, B1 and B2, A1 and B1, and A2 and B2 (P < 0.05). Optical microscope showed numerous bubbles in the cured UGP, and no air bubbles in the SLC. The surface of PMMA was rough. SEM images showed that each group had continual consistent adhesive interface and a whisker hump on the adhesive layer of A2 and B2.

CONCLUSIONThe SBS ofUGP, SLC, and PMMA achieved minimum clinical standard of 0.44 MPa. The SBS of UGP and PMMA were higher than that of SLC and PMMA. The polymerization method of heat curing was higher than room temperature curing.