Objective To investigate the relationship of mental health and the personality traits of higher vocational college students. Methods Using CCSMHS and NEO-FFI,679 higher vocational College Students from 4 Hunan Vocational College were investigated. Results ①A few people of higher vocational college students had obvious psychological symptoms,and more people were in a state of sub-health. ②The personality trait of female higher vocational college students is different from that of the male significantly. There is no significant difference between different grades and different disciplines. ③There was a significant relation between the mental health of higher vocational college students and a number of personality traits. Conclusion The personality traits are the main factors influencing mental health of higher vocational college students.

Objective To investigate the clinical efficacy of re-modified Sugiura procedure for the treatment of portal hypertension.Methods The retrospective cohort study was adopted.The clinical data of 119 patients with portal hypertension who were admitted to Second People's Hospital of Yichang from June 2006 to October 2014 were collected.Seventy-two patients who underwent pericardial devascularization were allocated into the Hassab group,and the other 47 patients who underwent the re-modified Sugiura procedure were allocated into the R-M Sugiura group.All the patients firstly underwent splenectomy.The patients of the Hassab group received the classical surgery of pericardial devascularization,and the operation in the R-M Sugiura group was improved on the modified Sugiura procedure in several aspects:(1) the cardia was transected obliquely.(2) Paraesophageal vessels were preserved by selective pericardial devascularization.(3) The pedicled omentum covered the anterior anastomosis and was sutured to the posterior abdominal wall.Observed indices included (1) intraoperative and postoperative situations:operation time,volume of intraoperative blood loss,postoperative anal exhaust time and duration of postoperative hospital stay.(2) Postoperative complications:postoperative pleural effusion,perioperative digestive tract re-bleeding,difficult swallowing,portal vein thrombosis and gastric dynamic dysfunction.(3) Situation of follow-up.The follow-up was performed by telephone interview and outpatient examination to observe the grading of the esophageal varices at postoperative month 6 and 18 using gastroscope till February 2016.Measurement data with normal distribution were presented as x ± s,and comparison between groups was done by the t test.Count data were analyzed by the chi-square test.Ranked data were analyzed by Wilcoxon rank test.Results (1) Intraoperative and postoperative situations:operation time of the Hassab group and the R-M Sugiura group was (201 ± 27) minutes and (255 ± 32) minutes,respectively,with a statistically significant difference between the 2 groups (t =9.67,P ＜ 0.05).The volume of intraoperative blood loss,postoperative anal exhaust time and duration of postoperative hospital stay were (380 ± 86) mL,(2.7 ± 0.7) days,(14.2 ± 2.4) days in the Hassab group and (401 ± 72) mL,(3.0 ± 1.7) days,(15.1 ± 2.7) days in the R-M Sugiura group,respectively,showing no statistically significant difference (t =1.35,1.26,1.86,P ＞ 0.05).(2) Postoperative complications:dysphagia was detected in 3 patients of the Hassab group and in 10 patients of the R-M Sugiura group at the postoperative day 10,with a statistically significant difference between the 2 groups (x2 =0.86,P ＜ 0.05).However,dysphagia was detected in 1 patient of the Hassab group and in 4 patients of the R-M Sugiura group at the postoperative day 20,showing no statistically significant difference between the 2 groups (x2 =2.03,P ＞ 0.05).The number of postoperative pleural effusion,perioperative digestive tract rebleeding,portal vein thrombosis and gastric dynamic dysfunction of the Hassab group and the R-M Sugiura group were 23,6,10,8 cases and 20,1,6,6 cases,respectively,showing no statistically significant difference (x2=1.39,1.02,0.03,0.08,P ＞ 0.05).(3) Situation of follow-up:all the patients were reexamined using gastroscope to observe the grading of esophageal varices.There were 0,7,56,9 patients of G0,G Ⅰ,G Ⅱ,G Ⅲ grading of varices in the Hassab group and 35,12,0,0 patients in the R-M Sugiura group at postoperative month 6,showing a statistically significant difference between the 2 groups (Z =-9.64,P ＜ 0.05).There were 0,0,48,24 patients of G0,G Ⅰ,G Ⅱ,G Ⅲ grading of varices in the Hassab group and 24,20,3,0 patients in the R-M Sugiura group at postoperative month 18,showing a statistically significant difference between the 2 groups (Z =-9.28,P ＜ 0.05).Conclusion The re-modified Sugiura procedure is more effective than the Hassab operation in curing portal hypertension,and it could also reduce the rate of rehemorrhage and improve the short-term and long-term prognosis.

Objective To identify the efficacy small interfering RNA against Pseudomonas aeruginosa expressing MexA-MexB-OprM efflux pumps.Methods Four siRNA ( siRNA1,siRNA2,siRNA3 and siRNA4) against mexB gene were designed and prepared by electricity transference in vitro.MICs of antibiotic combined with efflux pump inhibitors against multiple resistant strain PAO1 and PAO3 were determined by E-test method.The mRNA expression levels of efflux pump gene (mexB) were quantified by real time fluorescent quantitative PCR.Results siRNA expression vectors were constructed success by enzyme cut method.48 after PAO1 and multiple drug resistant PAO3 transfected with siRNA4,the sensibilities to antibiotic were enhanced.48 after PAO1 and multiple drug resistant PAO3 transfected with siRNAl,siRNA2 and siRNA3,the sensibilities to antibiotic didn't change obviously.48 after PAO1 and multiple drug resistant PAO3 ttransfected with siRNA4,the expression level of mexB was decreased obviously (P ＜ 0.05 ).48 after PAO1 and multiple drug resistant PAO3 transfected with siRNA1,siRNA2 and siRNA3,the expression level of mexB didn't change obviously.Conclusion siRNA against Pseudomonas aeruginosa expressing MexA-MexB-OprM efflux pumps enhanced the sensibility to antibiotic and inhibited the expression of mexB gene.Our results demonstrate the using RNAi may be potential targets for novel therapies directed against treatment of antibiotic-resistant infections.

Objective To investigate the effect of pvdQ(PA2385)gene on Pseudomonas aeruginosa swarming motility.Methods The plasmid pME6032 with pvdQ gene was constructed and identified,then transformed into Pseudomonas aeruginosa PAO1 using the eleetroporation to build pvdQ-overexpression strain.The pME6032-PAO1 strain was constructed with the same method.The cloning plasmid pEX18Gm containing sacB was successfully used to construct unmarked deletion mutant of pvdQ gene and pvdQ mutant strain. Bacteria were inoculated in LB and were cultured overnight.The clones were measured for the diameter of the swarming zone.The statistical analysis was done using one-factor ANOVA.Results Strains of pvdQ-overexpression and pvdQ-mutant were successfully constructed and confirmed by polymerase chain reaction(PCR).The four strains were compared for the swarming motility by changes in diameter:PAO1(20.52±1.80)mm,pME6032-PAO1 strain(19.39±2.10)mm,pvdQ-overexpression strain(51.20±2.16)mm,pvdQ-mutant strain(3.30±0.55)mm.The diameter of pME6032-PAO1 strain was not significantly different from that of wild strain PAO1(t=-0.1493,P>0.05).However,the diameter of pvdQ(Q-mutant strain was significantly shorter than that of wild strain PAO1(t=2.8525,P<0.05).while the diameter of pvdQ-overexpression strain was longer than that of the wild strain PAO1(t=1.4230,P<0.05).Conclusions pvdQ gene may be involved in regulating the swarming motility of Pseudomonas aeruginosa,which can promote Pseudomonas aeruginosa swarming motility.

Objective To assess the relationship between gastric carcinoma perfusion imaging parameters with the multislice spi-ral CT (MSCT)and the tumor angiogenesis(MVD,VEGF).Methods (1)33 patients with gastric cancer were carried on perfusion CT scanning in the suspected lesions,and compared with operation and histological result.MSCT perfusion parameters tumor,such as local blood flow (BF),blood volume (BV),mean transit time of contrast agent (MTT),permeability surface (PS),were recor-ded,and compared with clinical pathological data.(2)27 patients of 33 cases which CT perfusion plane matching with operation pa-thology specimens performed with tumor microvessel density (MVD),vascular endothelial growth factor (VEGF)monoclonal anti-body immunohistochemical examination of MVD,the most intensive areas of high power (×200 HP)field counted,and VEGF stai-ning positive judged.Results Achievement ratio of gastric carcinoma MSCT perfusion imaging was 84.85% (28/33).The average value of BF,BV,MTT and PS were 63.658 ± 18.305,7.5 1 1 ± 2.427,1 1.952 ± 4.325 and 31.81 7 ± 13.533,respectively,and MVD was 37.7 ± 11.1/200 HP (range:13-60).VEGF was positive in 16 cases,negative in 11 cases.Gastric carcinoma undifferentiated group perfusion parameter PS value (35.1 5 ± 12.74 )and MVD (40.53 ± 10.66 )were higher than the differentiation group (23.90 ± 12.71 and 31.13 ± 9.82 )(P < 0.05 ),but BF,BV,MTT not statistically significant;Differences of CT perfusion parameters and MVD were not significant statistically between invasive serosa and noninvasive ;PS value (36.65± 12.80)of lymph node metastasis was greater than without metastasis(22.70 ± 1 1.1 5 )(P <0.01 ),the other was no significant difference;TNM staging Ⅲ,Ⅳ phase group of BF value (69.56 ± 1 6.49),PS value (34.90 ± 12.80)and MVD value (40.74 ± 10.53)were higher than Ⅰ,Ⅱ Group (49.63 ± 1 5.04),(24.50 ± 13.13)and (30.63 ± 9.61)(P <0.01).Spearman correla-tion analysis in confidence (two tails)of 0.01 was statistically significant between MVD in tumor tissues and gastric cancer MSCT perfusion parameters of BF (r=0.404)and MTT (r=0.371),whereas BV and PS were no significance.The regression equation of MVD with BF and MTT:MVD =1 6.602+0.1 50XBF +0.967XMTT,model checking of F values was 6.62,P =0.003.Conclusion The gastric carcinoma multi-slice CT perfusion imaging parameters BF,MTT and MVD,VEGF(+)was positive correlation, MSCT perfusion imaging parameters reflects tumor VEGF positive expression of gastric carcinoma.

Objective To study the effect and safety of conversion from calcineurin inhibitors to rapamycin in kidney transplantation recipients with chronic allograft nephropathy.Methods In 82 kidney transplant recipients enrolled in this study,72 cases were diagnosed as having chronic allograft nephropathy by biopsy.Recipients (SRL group) were administered with rapamycin after withdrawal of calcineurin inhibitors.The doses of CNI in other recipients (non-SRL group) were not changed.Renal function,proteinuria,blood pressure,blood fat,hepatic function and hemogram were observed for 24 months in each group.Results During the follow-up period,serum creatinine level was dropped significantly in SRL group (P＜0.05),but it was increased in non-SRL group (P＜0.05).SRL group showed increased proteinuria,serum cholesterol and triglycerides (P＜0.05),and reduced Plt (P＜0.05).According to the renal function before conversion,the recipients who were administered rapamycin divided into four groups.In group A (Scr ＜ 120 μmol/L),there was no significant difference in diverse variables before and after conversion.In group B (Scr 120-200 μmol/L and Banff Ⅰ-Ⅱ),renal function was improved,and proteinuria alleviated.In group C (Scr 120-200 μmol/L and Banff ＞ Ⅱ),and group D (Scr ＞200 μmol/L),renal function was damaged to varying degrees and proteinuria was deteriorated.Conclusion It is safe and effective for patients with chronic allograft nephropathy to convert from calcineurin inhibitors to rapamycin.

Staphylococcus aureus (S. aureus) is an important human pathogen which can cause a chronic condition with a high relapse rate despite the aggressive antimicrobial treatment. Recent studies showed that intracellular pattern recognition receptors (including NOD) in response to bacteria or bacterial products play a proinflammatory role by activating nuclear transcription factor-κB (NF-κB). But how NOD2 mediates the proinflammatory response to S. aureus in mast cells (MCs) is unclear. So, in this study, we attempted to examine the role of NOD2 in inflammatory responses of MCs to S. aureus. P815 cells (a mouse mast cell line) were cultured. Real-time PCR was used to detect the NOD2 mRNA expression in P815 cells during S. aureus infection. The siRNA against NOD2 gene was synthesized and transfected into S. aureus-infected P815 cells. By using the methods of ELISA and flow cytometry, the effects of NOD2 gene silencing on cell phagocytosis, cytokine secretion, NF-κB activation and cell apoptosis of the S. aureus-infected P815 cells were examined. It was found that S. aureus infection could increase the expression of NOD2 mRNA in P815 cells. NOD2 gene interference in P815 cells reduced the number of S. aureus engulfed by P815 cells, the level of cytokines and the activation of NF-κB. In addition, S. aureus could induce the apoptosis of P815 cells, but NOD2 gene silencing did not affect the cell apoptosis rate. Our data suggested that NOD2 plays a key role in pathogen recognition, signal transduction, and NF-κB activation in the inflammatory responses of MCs infected by S. aureus.

In order to investigate the role of the MexA-MexB-OprM efflux pump system in the pathogenesis of Pseudomonas aeruginosa (PA)-induced pulmonary infection, pulmonary infection models were established by intratracheal injection of K767 (wild type), nalB (MexA-MexB-OprM up-regulated mutant), and ΔmexB (knockout) strains, separately. All mice were treated with Meropenem (intraper Δ itoneal injection, 100 mg/kg body weight, twice every day), and strain-related pathology, bacteria count, cytokine level, myeloperoxidase (MPO, indicator of neutrophil recruitment) activity, and macrophage inflammatory protein-2 (MIP-2) expression were evaluated at early (3rd day post-infection) and late (7th and 14th day post-infection) stages of infection. E-test showed that ΔmexB was more significantly Δ sensitive to panipenan (ETP), meropenem (MP) and imipenem (IP) than K767 and nalB strains. There was no significant difference in sensitivity to cefepime (TM) among the three stains. In contrast to the K767 and nalB groups, the ΔmexB group showed decreased bacteria burden over time and less exte Δ nsive pathological change. Additionally, MPO activity and levels of inflammatory cytokines (IL-1b, IL-12, and TNF-α) were increased at the early stage (day 3) and decreased at the later stage (day 14). Serum MIP-2 expression level was steadily increased in all three groups from early to late stages, but significantly higher in ΔmexB group than in K767 and nalB groups ( Δ P<0.05). In conclusion, the MexA-MexB-OprM efflux pump system might play an important role in PA-induced chronic pulmonary infection. High expression of the MexA-MexB-OprM efflux pump could increase antibacterial resistance and promote infection.

AIM:To investigate the effect of fenbendazole (FBZ) on the proliferation of human chronic myelogenous leukemia (CML) cell line K562.METHODS:The CCK-8 assay was used to detect the effect of FBZ on viability of the K562 cells and normal peripheral blood mononuclear cells (PBMC).The cell growth was measured by the method of Trypan blue exclusion.The cell cycle was analyzed by flow cytometry.The cell cycle-related proteins were detected by Western blot.RESULTS:The growth of K562 was significantly inhibited by FBZ.However, it elicited little cytotoxic effect on PBMC.Furthermore, FBZ induced G2/M phase arrest and mitotic catastrophe in the K562 cells based on the changes of nuclear morphology, DNA content, mitotic marker analysis and the number of polykaryocytes.CONCLUSION:Fenbendazole significantly inhibits the proliferation of K562 cells and induces cell cycle arrest at G2/M phase by the regulation of cell cycle-related proteins.

Objective To investigate the efficacy of small interfering RNA against Pseudomonos aeruginosa expressing MexA-MexB-OprM multidrug efflux pump in vivo.Methods Two short hairpin (sh)RNA expression vectors targeting the MexB gene,and negative controls,were designed,synthesized,and electrotransformed into the P.aeruginosa strain PAO1.The in vivo therapeutic efficacy of the MexB small interfering (si)RNAs was determined by infecting a murine model of chronic P.aeruginosa lung infection (1 × 107 CFU/ml).The mice were killed on day 3,5 and 7 after infection with the Pseudomonas aeruginosa strains.Results In the murine infection model,treatment with MexB-siRNAs led to significantly reduced bacteria burden of the bellows by day 5 and 7 post-infection,and reduced the P.aeruginosa-induced pathological changes.In addition,MexB-siRNA2 treatment enhanced neutrophil recruitment and production of inflammatory cytokines (IL-1β,IL-12) in the early infection stage (day 3) (P＜0.05),both of which decreased by day 7.Conclusion MexB-siRNA could inhibit both mRNA expression and the activity of P.aeruginosa in vitro.siRNA was effective in reducing the bacterial load in a murine model of chronic lung infection.Targeting of MexB with siRNA appears to be a novel strategy for treating P.aeruginosa infections.