Objective: To develop novel targeted anticancer medicines for effective treatment of nasopharyngeal carcinoma ( NPC) , a prevalent malignant disease in southern China and southeast Asia.Methods: CNE cells were treated with a novel indolinone IF239 synthesized by our research group. Cell viability was determined by the acid phosphatase assay ( APA). Morphologic changes and adhesion status of CNE cells treated with IF239 were observed under a light microscope. Flow cytometry was used to analyze the cell cycle phases . Key regulating molecules in the cell cycle progression were detected by Western blotting. Results: IF239 had potent cytotoxic effect on CNE cells. The possible antitumor mechanisms of IF239 involved inhibition of cell adhesion and cell cycle arrest in the G2_/M phase. Moreover,G2_/M arrest caused by IF239 was related to up-regulation of both cyclin B1 and the phosphorylation level of CDK1. Conclusion: IF239 has high anticancer activity over CNE cells, and has unique anticancer mechanisms, suggesting that IF239 has promising application potentials.

OBJECTIVE:To prepare and characterize capreomycin sulfate liposomes(CSL).METHODS:Capreomycin sulfate was entrapped into liposomes using active loading that pH gradient methods,ammonium sulfate gradient methods and sodium acetate gradient methods respectively followed by lyophilization technique.The liposome was characterized by entrapment efficiency,particle size,? potential and the stability.RESULTS:The entrapment efficiency of CSL pre-and post-lyophilization prepared by three methods were 65.7% and 65.2 %,20.1% and 18.6%,34.6% and 32.4%,with particle size of 136 and 145 nm,144 and 153 nm,142 and 159 nm,? potential of —20.2 and —19.5 mV,—24.4 and —22.9 mV,—18.7 and —17.8 mV respectively.No obvious changes were found in all the indexes in the stability test.CONCLUSIONS:The pH gradient technique is suitable for preparing CSL in 3 kinds of methods.

OBJECTIVETo compare efficacy of unilateral external fixators and locking compression plates in treating type C fractures of the distal radius.

METHODSFrom January 2009 to June 2010, 76 patients with distal radius fracture were treated with LCP and external fixators, 54 patients were followed up. Among them, 29 cases were male and 25 cases were female with an average age of 45.31 (ranged, 24 to 68) years old. There were 29 patients in LCP group. According to AO classification, 8 cases were type C1, 7 cases were type C2 and 14 cases were type C3. There were 25 cases in external fixators group. According to AO classification, 6 cases were type C1, 8 cases were type C2 and 11 cases were type C3. Radial height, volar tilt and radial inclination were compared, advanced Gartland-Werley scoring were used to assessed wrist joint function after 6 and 12 months' following up.

RESULTSTwo cases were suffered from nail infection in external fixators group. Fifty-four patients were followed up from 12 to 24 months with an average of 21.3 months. Radial height was (9.60 +/- 0.72) mm, volar tilt was (9.55 +/- 0.80) degrees and radial inclination was (21.40 +/- 0.78) degrees in LCP group,while those were (9.40 +/- 0.70) mm, (9.47 +/- 0.71) degrees and (21.20 +/- 0.73) degrees in external fixtors group, and with no statistical significance (P>0.05). Advanced Gartland-Werley score after 6 months' following up was 3.31 +/- 1.17 in LCP group, 5.56 +/- 1.58 in external fixtors group, and with significant difference (t=-5.99,P<0.05); after 12 months' following up, advanced Gartland-Werley score was respectively 2.66 +/- 1.01 and 3.08 +/- 1.00, but with no statistical meaning (t=-1.55, P>0.05).

CONCLUSIONLCP and external fixtors can receive good curative effects in treating type C distal radius fracture, and LCP can obtain obviously short-term efficacy, while there is no significant difference between two groups in long-term results. For serious distal radius comminuted fracture which unable to plate internal fixation, external fixators is a better choice.

Adult ; Aged ; Bone Plates ; External Fixators ; Female ; Fracture Fixation, Internal ; Fractures, Comminuted ; surgery ; Humans ; Male ; Middle Aged ; Radius ; surgery ; Radius Fractures ; surgery ; Treatment Outcome ; Young Adult

BACKGROUND: Aseptic loosening occurs after long-term total hip replacement, which directly affects the service life and prospective efficacy of artificial joints. The particles produced by artificial joint wear lead to the surrounding bone dissolved, further cause loosening, among which, polyethylene particles because of acetabular liner wear stand out. OBJECTIVE: To systematically assess the acetabular liner wear, loosening and osteolysis caused by cross-linked polyethylene or conventional polyethylene after total hip arthroplasty. METHODS: A computer-based research of Medline, EMbase, CBM, CNKI, CqVip, WanFang databases before December 2015 and Cochrane (3rd issue, 2011) was performed in accordance with the retrieval strategy made by Cochrane collaboration. A manual retrieval of related bone journals and conference papers was conducted. Eleven randomized controlled trials about the wear caused by cross-linked polyethylene or conventional polyethylene after total hip arthroplasty were enrolled based on inclusion criteria, followed by a Meta-analysis using RevMan 5.0 software. RESULTS AND CONCLUSION: (1) Eleven randomized controlled trials involving 952 patients were included. (2) Meta-analysis showed that the acetabular liner wear rate of cross-linked polyethylene was significantly lower than that of conventional polyethylene at 5 years postoperatively [MD=-0.07, CI(-0.09, -0.05), I2=93%, P < 0.00001]; the large heterogeneity was decreased [MD=-0.06, 95%CI (-0.07, -0.04), I2=39%, P < 0.00001] after three research removed through sensitivity analysis. (3) The osteolysis rate in the cross-linked polyethylene group was significantly lower than that in the conventional polyethylene group [RR=0.39, 95%CI (0.27, 0.57), I2=0%, P < 0.00001]. (4) These results suggest that the cross-linked polyethylene liners exhibit reduced radiological wear and osteolysis, but the mean follow-up of 5 years (1.8 to 8.0) cannot meet the long-term requirements. Therefore, multi-central, large sample size and high-quality randomized controlled trials are needed to testify the efficacy and safety of cross-linked polyethylene.BACKGROUND: Aseptic loosening occurs after long-term total hip replacement, which directly affects the service life and prospective efficacy of artificial joints. The particles produced by artificial joint wear lead to the surrounding bone dissolved, further cause loosening, among which, polyethylene particles because of acetabular liner wear stand out. OBJECTIVE: To systematically assess the acetabular liner wear, loosening and osteolysis caused by cross-linked polyethylene or conventional polyethylene after total hip arthroplasty. METHODS: A computer-based research of Medline, EMbase, CBM, CNKI, CqVip, WanFang databases before December 2015 and Cochrane (3rd issue, 2011) was performed in accordance with the retrieval strategy made by Cochrane collaboration. A manual retrieval of related bone journals and conference papers was conducted. Eleven randomized controlled trials about the wear caused by cross-linked polyethylene or conventional polyethylene after total hip arthroplasty were enrolled based on inclusion criteria, followed by a Meta-analysis using RevMan 5.0 software. RESULTS AND CONCLUSION: (1) Eleven randomized controlled trials involving 952 patients were included. (2) Meta-analysis showed that the acetabular liner wear rate of cross-linked polyethylene was significantly lower than that of conventional polyethylene at 5 years postoperatively [MD=-0.07, CI(-0.09, -0.05), I2=93%, P < 0.00001]; the large heterogeneity was decreased [MD=-0.06, 95%CI (-0.07, -0.04), I2=39%, P < 0.00001] after three research removed through sensitivity analysis. (3) The osteolysis rate in the cross-linked polyethylene group was significantly lower than that in the conventional polyethylene group [RR=0.39, 95%CI (0.27, 0.57), I2=0%, P < 0.00001]. (4) These results suggest that the cross-linked polyethylene liners exhibit reduced radiological wear and osteolysis, but the mean follow-up of 5 years (1.8 to 8.0) cannot meet the long-term requirements. Therefore, multi-central, large sample size and high-quality randomized controlled trials are needed to testify the efficacy and safety of cross-linked polyethylene.

Objective To explore the effects of self-differentiation,social support,social adaptation on suicidal ideation.Methods A simplified cluster sampling method,involving the random selection of 3097 college students in 23 departments,was used to estimate the scores of Chinese version of Self Differentiation Inventory for university student(SDI),Social Support Rating Scale(SSRC),College Student Adaptability Scale (CSAS) and Adult Suicidal Ideation Questionnaire(ASIQ).The independent-samples t-test,Pearson correlation coefficients and stepwise regression analyses were used as statistical analysis techniques.Results The correlation coefficients were negatively significant between suicidal ideation and self-differentiation,social support and social adaptation (r=-0.24,-0.17,-0.29,P＜0.001).Social adaptation showed the strongest predictability for suicidal ideation (β=-0.19,P＜0.001),followed by self-differentiation (β3=-0.13,P＜0.001),social support (β3=-0.08,P＜0.001).Independent samples t-test showed that college students with suicidal ideation showed a significant reduction in interpersonal adaptation,social support,self-differentiation compared to those without suicidal ideation.Conclusion Self-differentiation level,social support and social adaptability may be effective predictors for suicidal ideation among college students.Future intervention programs may focus on enhancing the interpersonal skills of college students to reduce prevalence of suicidal behavior.

Objective To evaluate the impact of different treatment strategies on patients with hepatocellular carcinoma (HCC) of less than 10 cm but with portal vein tumor thrombus (PVTT),and to investigate the prognostic factors.Methods Between 2003 and 2008,338 HCC patients with PVTT from the Affiliated Tumor Hospital,Guangxi Medical University,were retrospectively studied.These patients were divided into four groups:the conservative treatment group (n =75),the transarterial chemoembolization (TACE) group (n=86),the surgical resection group (n =90) and the surgical resection with postoperative TACE group (n=87).Survival rates were analyzed by the Kaplan-Meier method and differences among groups were compared using the log-rank analysis.The Cox' s proportional hazards model was performed to explore the risk factors of survival.Results The mean survival periods of patients in the four groups were 3.8,7,8.2,15.1 months respectively.There were significant differences in survival rate among the 4 groups.The survival rates at 1-,2-,and 3-year in the surgical resection with postoperative TACE group were 49％,37％ and 19％,which were significantly higher than the other 3 groups (P＜0.05).The 1-,2-,and 3-year survival rates in the surgical resection group were 28％,20％ and 15％ compared with 17.5％,0％ and 0％ in the TACE group.The survival rates were significantly higher after surgical resection than TACE (P＜0.05).The 1-,2-,and 3-year survival rates in the conservative treatment group were 0％.These were the lowest among the four groups (P＜0.05).Univariate analysis indicated that portal vein occlusion by tumor thrombus was a significant predictor of poor prognosis.Multivariate analysis revealed that the strategy of treatment (TACE) and the number of TACE cycles were independent survival predictors for HCC patients with PVTT.Conclusions Surgical resection is the most effective therapeutic strategy for HCC patients with PVTT and with good liver functional reserve.Postoperative TACE is necessary in preventing recurrence and prolonging survival in patients who could tolerate chemoembolization.TACE should be recommended as an effective and safe treatment for unresectable HCC patients with PVTT.The treatment provided a significantly better survival than conservative treatment.

Objective To study the effect and mechanisms of berberine (BBR) on the proliferation of papillary thyroid cancer K1 cells induced by high glucose.Methods K1 cells were cultured under 5.5 mmol/L or 25 mmol/L glucose condition with or without different concentration of BBR (0,10,40 and 80 μmol/L) for 24 hours.The proliferations of K1 cells in each condition were detected by MTT.Western blot was used to measure the expression of nuclear factor erythroid 2-related factor 2 (Nrt2),phosphoinositide 3-kinase (PI3K),protein kinase B (Akt) and phosphorylated-Akt (p-Akt).The distribution pattern of Nrf2 in K1 cells was determined using immunofluorescent staining.Results Compared with 5.5 mmol/L condition,the proliferation rate [(126.64 ± 5.41) ％ vs (87.31 ± 3.67) ％],expression levels of PI3K (0.425 ±0.019 vs 0.272 ±0.039),p-Akt/Akt (0.446 ±0.021 vs 0.168 ±0.035) and Nrf2 (0.597 ± 0.014 vs 0.308 ± 0.026),and Nrf2 distribution (93.0％ vs 23.1％) in nuclear of K 1 cells under 25 mmol/L condition were significantly elevated,respectively (all P ＜0.01).Addition of BBR in 25 mmol/L condition dose dependently (10,40,80 μmol/L) lowered the proliferation rate of K1 cells [(111.76 ± 4.10)％,(70.03 ±2.18)％,(32.41 ±3.76)％ vs (126.64 ±5.41)％,all P＜0.05],and suppressed the expression of PI3K,p-Akt/Akt,Nrf2,and Nrf2 nuclear distribution (P ＜ 0.05).Conclusions BBR dose dependently inhibited the proliferation of high glucose-induced K1 cells.This effect was associated with the suppression on of PI3K/Akt signaling activation,Nrf2 expression and its nuclear translocation.

Objective To evaluate the efficacy and safety of thromboprophylaxis with low molecular weight heparin after lumbar decompressive surgery.Methods Between January 2004 and April 2011,patients who had undergone lumbar decompressive surgery and had high or very high risk of venous thrombosis were selected.All patients received subcutaneous injection of low molecular weight heparin (Fraxiparine),starting at 6 hours after surgery with a half dose and subsequently once every 24 hours with full dose until discharge.When 24-hour drainage volume was less than 50 ml,the drainage tube was removed 2 hours prior to low molecular weight heparin administration.The occurrences of deep venous thrombosis (DVT),pulmonary embolism (PE),bleeding complications and side effects were recorded.Results Seventy eight patients were enrolled in the study.The average time of drug use was 8.5 days.No symptomatic DVT,PE and major bleeding events occurred.Drainage tube was placed in all patients except 3 patients with lumbar disc herniation.The mean total drainage volume was (319.5±218.5) ml,and the average time from operation to removal of drainage tube was (43.2±14.4) hours.Incision site ecchymosis occurred in 1 patient,incision bleeding in 1 patient,mild elevation in hepatic aminotransferase levels in 4 patients,and mild anaphylaxis in 1 patient.Conclusion It is effective and safe to prevent VTE with low molecular weight heparin for patients with high or very high risk of venous thrombosis after lumbar decompressive surgery.

HIV-1 gp41 has been successfully anchored on the cell surface of yeast Saccharomyces cerevisiae by yeast cell-surface display systems using His-tag for the detection of protein expression. Gp41 activity has been detected by gp41 monoclonal antibody. The vector for gp41 yeast display has been constructed as follows: the gene-encoding gp41 was amplified by PCR using pMD18T-gp41 as a template, and then inserted into shuttle vector pICAS-His by restriction enzyme digestion. Next, the vectors were introduced into Saccharomyces cerevisiae MT8-1. After cultivation, recombinant cells were immunofluorescence labelled. The bright green cells were observed by the microscopy indicating the proteins have been displayed on the cell surface successfully, flow cytometry convinced that gp41 has been folded correctly on the cell surface. Then different concentrations of initial glucose were used to enhance the expression of protein. gp41 has been expressed by 82.46% yeast cells as the concentration of glucose was 1%. Protein expression was depressed when the concentration was increased.
Genetic Engineering ; methods ; Genetic Vectors ; genetics ; metabolism ; HIV Envelope Protein gp41 ; biosynthesis ; genetics ; Humans ; Protein Folding ; Recombinant Fusion Proteins ; biosynthesis ; genetics ; Saccharomyces cerevisiae ; cytology ; genetics ; metabolism ; Saccharomyces cerevisiae Proteins ; genetics ; metabolism ; Surface Properties

Objective To establish an isolated rat pancreas perfusion technique,a method for the precise measurement of insulin secretion in vitro.Methods An isolated rat pancreas perfusion technique was applied in the study of insulin secretion from?-cells in 10 high-fat diet-induced obese Wistar rats.Results For the assessment of the functional integrity of the perfused pancreas,the isolated pancreas of 6 rats met all the criteria: (1)The constancy of perfusion pressure was kept over the whole experiment time[(70?5)mm Hg,1 mm Hg= 0.133 kPa].(2)The duodenal peristaltic activity of isolated pancreas and duodenum block was present after perfusion experiment.(3)Total insulin response to arginine stimulation was significantly increased as compared with glucose stimulation[maximum insulin secretion rate:(987?100)?U/min vs(545?50)?U/min,P