Objective To explore the role of xCT in the metastasis and drug resistance of nasopharyngeal carcinoma (NPC),to provide new evidences for the mechanism of NPC metastasis and drug resistance,and to enhance effects of chemotherapy.Methods Fluorescence quantitative polymerase chain reaction (PCR) and Western blot were used to detect the xCT expression of 5-8F and 6-10B.The xCT eukaryotic expression vector was constructed to transient transfect 6-10B cell lines.The 5-8F cell lines were treated with xCT antisense oligodeoxynucleotide (ASO).Scratching assay and transwell method were used to detect the cell metastasis and invasion abilities.The expressions of matrix metalloproteinase 1 (MMP1) of all the cell lines were surveyed by Western blot.Results The results of fluorescence quantitative PCR and Western blot showed that the expression of xCT in 5-8F was higher than 6-10B in the levels of mRNA and protein.Exogenous overexpression of xCT enhanced metastasis and invasion abilities of 6-10B cells.Silencing and inhibition of xCT could decrease metastasis and invasion abilities of 5-8F cells.The expressions of MMP1 protein in 5-8F were higher than 6-10B,and they were positively correlated with the expression of xCT.Conclusions xCT is closely related to the metastasis and invasion abilities of nasopharyngeal carcinoma.xCT could enhance the metastasis and invasion abilities of NPC cells.xCT might mediate proliferation and matastasis/invasion of NPC cells through MMP1.

Objective To explore the effect of multiple positioning procedure for prolapse and hemorrhoids (PPH) in treatment of connective tissue type mixed hemorrhoids,and compare the results between PPH and Milligan-Morgan surgery.Methods One hundred and sixteen patients with connective tissue type mixed hemorrhoids were divided into treatment group (62 cases) and control group (54 cases)according to random digits table method.The patients in treatment group received multiple positioning PPH,and the patients in control group received Milligan-Morgan surgery.The operative time,intraoperative blood loss,postoperative pain score,anal margin edema,wound healing time,perianal scar,anorectal stenosis,anal discharge and anorectal resting pressure were evaluated and compared between 2 groups.Results The operative time and intraoperative blood loss in treatment group were significantly lower than those in control group:(15.0 ± 2.3) min vs.(35.0 ± 3.4) min and (5.0 ± 2.1) ml vs.(15.0 ± 3.2) ml,and there were statistical differences (P ＜ 0.05).The postoperative pain score and wound healing time in treatment group were significantly lower than those in control group:(4.83 ± 0.62) scores vs.(7.82 ± 0.37) scores and (8.2 ± 2.6) d vs.(17.4 ± 3.8) d,the rates of anal margin edema,perianal scar and anorectal stenosis in treatment group were significantly lower than those in control group:8.1％ (5/62) vs.37.0％ (20/54),0 vs.29.6％ (16/54) and 1.6％(1/62) vs.16.7％ (9/54),and there were statistical differences (P ＜ 0.05 or ＜ 0.01).The postoperative anorectal resting pressure was significantly lower than preoperative in control group:(13.80 ± 4.20) kPa vs.(17.20 ± 5.87) kPa,and there was statistical difference (P＜ 0.05).One patient (1.6％,1/62) in treatment group occurred anal discharge,and 10 patients (18.5％,10/54) occurred anal discharge in control group.The rate of anal discharge in treatment group was significantly lower than that in control group,and there was statistical difference (P ＜ 0.01).Conclusions Multiple positioning PPH is effective for the treatment of connective tissue type mixed hemorrhoids.It improves the controllability of the amount of removal and the excision site.It decreases the incidence of anal margin edema,perianal scar and anal discharge scar,which provides an effective protection for the anal function.

[ ABSTRACT] AIM:To explore the expression pattern of microRNA-205 ( miR-205) in glioma tissues and its role in the invasion of glioma cells.METHODS:The expression of miR-205 and TBX18 was detected by real-time PCR and immunohistochemical observation, respectively.Transwell assay was used to examine the invasion change of U251 glioma cells after miR-205 overexpression via miR-205 mimics or decrease in miR-205 expression by miR-205 inhibitor.The target of miR-205 was searched by bioinformatics analysis combined with experimental analysis.The protein level of TBX18 was determined by Western blotting after siRNA transfection and Transwell assay was conducted.RESULTS:miR-205 expres-sion was downregulated in 82.6%of detected glioma tissues and TBX18 was significantly overexpressed in glioma tissues compared with normal tissues.miR-205 overexpression remarkably inhibited the invasion potential of U251 glioma cells with a decrease in the invasive cells (P<0.01), while inhibition of miR-205 significantly enhanced the invasion ability of U251 cells.Mechanically, miR-205 directly targeted TBX18 and downregulation of TBX18 also significantly inhibited the invasion potential of U251 cells with a decrease in the invasive cells ( P<0.01 ) .CONCLUSION: miR-205 expression is de-creased in glioma, and miR-205 inhibits glioma cell invasion via targeting TBX18.Our research contributes to the mecha-nisms responsible for glioma invasion and provides theoretical base for developing new therapeutic strategy to treat glioma.

Objective To investigate the effect of miR-145 on human lung adenocarcinaoma A549 cell proliferation and FSCN1 expression. Methods pmR-mcherry/miR-145 was constructed and transfected into A549 cell,then the expression of miR-145 and the proliferation of A549 cell were verified by QPCR and MTS assay, respectively.The situation of FSCN1 expression in A549 cell was detected by Western blot.Results pmR-mcherry/miR-145 vector was constructed successfully,and QPCR results indicated that miR-145 expressed effectively.Western blot results showed that FSCN1 was one of the targets of miR-145 in A549 cell.MTS assay results indicated that miR-145 inhibited the proliferation of A549 cell.Conclusion Overexpression of miR-145 can inhibit the proliferation of A549 cell, and FSCN1 was one of its target.

Objective To investigate the value of multi-slice spiral CT image texture analysis in differentiating metastatic (MLN) from non-metastatic lymph nodes (NLN) in patients with rectal cancer.Methods Thirty five patiets with rectal cancer who were pathologically confirmed by total mesorectum excision were included retrospectively,with regional lymph nodes (short-axis diameter of larger than 3 mm)found in preoperative CT images.All the patients underwent preoperative abdominal and pelvic dynamic contrast-enhanced CT scan.Regional lymph nodes were identified according to pathological findings,and were divided into MLN and NLN groups.The short-axis diameter,short-to long-axis diameter ratio of lymph nodes were manually measured and calculated,and the texture features,including skewness,kurtosis,variance,entropy and inverse difference moment,were analyzed.The above parameters between MLN and NLN groups were compared using independent sample t test or Mann-Whitney U test.ROC curve analysis was performed regarding the statistically significant parameters and the areas under curve (AUC) were calculated.Multivariate Logistic regression analysis was accomplished to obtain the independent predictive factor of diagnosing regional lymph nodes.Results A total of 68 regional lymph nodes were obtained and consisted of 31 MLNs and 37 NLNs.The short-axis diameter,kurtosis,and entropy of the MLN group were significantly higher than those of the NLN group (all P＜0.05).Whereas,the short-to long-axis diameter ratio,skewness,variance,and inverse difference moment did not differ significantly between the two groups (all P＞0.05).The AUC for distinguishing MLN from NLN of the short-axis diameter,kurtosis and entropy were 0.79,0.67,and 0.85,respectively.Multivariate logistic regression analysis showed that only entropy (odds ratio=8.48,95％ confidence interval was 3.01 to 23.92,P＜0.01) was screened out as the independent variable,which suggested that the entropy was the unique predictor for characterizing regional lymph nodes of rectal cancer.Conclusion Multi-slice spiral CT images texture analysis can facilitate the accurate differentiation between MLN and NLN in patients with rectal cancer,and especially the entropy has the optimal reference significance.

Ribosomal protein L23 is a new target for gene therapy of cancer.It participates in tumor progression by activating p53,inactivating murine double minute 2,regulating the carcinogenic activity of c-Myc,inducing the multi-drug resistance,and affecting the biologic behaviour of tumors.Generally,it′s con-sidered to be a potential prognostic factor in human cancers.

Objective To translate the Work Limitations Questionnaire and examine its reliability and validity,and explore its applicability at home.Methods 300 nurses were surveyed with the Chinese version of the Work Limitations Questionnaire by convenience sampling; and internal consistency reliability,test-retest reliability,construct validity and criterion validity were applied to evaluate the questionnaire.Results The Cronbach α coefficients of the time managing scale,physical scale,mental-interpersonal scale,output scale and total questionnaire were 0.882,0.864,0.913,0.839 and 0.922 respectively;and their test-retest reliability coefficients were 0.857,0.837,0.871,0.803 and 0.893 respectively.Four common factors were abstracted by using factor analysis,with the cumulative variance contribution rate at 61.293％.Using SF-36 as an external criterion,the correlation coefficients of the WLQ scores with the physical function dimension and mental health dimension of the SF-36 were-0.24 and-0.33.Conclusions The reliability and validity of the questionnaire is reasonable.So this questionnaire can be used to measure employee's presenteeism.

Objective To investigate the job burnout status of nurses in a third-grade and A-level general hospital in Zhengzhou,and analyze the relationship between job burnout and presenteeism.Methods 300 nurses were surveyed with questionnaires by convenience sampling,including nurses' demographic data,Nurse Job Burnout Scale and Work Limitations Questionnaire.Results The scores in three dimensions of job burnout of nurses were respectively EE (25.92±11.56) points,DP (10.63±6.82) points,and PA(26.30±9.11) points.The job burnout rate in nurses was 76.2％,the rates of low,moderate,and high degree of burnout were respectively 30.4％,28.7％,and 17.4％.The scores of presenteeism for low,moderate,and high degree of work limitations were respectively (2.29±1.60)points,(5.90±3.03)points,(7.89±3.12)points.Conclusions Nurses' burnout can results in presenteeism.The more serious job burnout is,the more critical the presenteeism is.

Objective:To investigate the role of p21 gene in the radiation-induced heart disease (RIHD) and to evaluate the effect on p21 gene knockout on RIHD phenotype in mouse models.Methods:p21 -/-mice were utilized in the experimental group, and p21 + /-mice were allocated in the control group. RIHD mouse models were established by exposure to 10 Gy whole heart irradiation by using a small animal radiation research platform. The heart samples were collected at 6 weeks after irradiation, the gross specimens were measured and subject to HE staining. The wall thickness and left ventricular ejection fraction of the mice were detected by the Vevo2100 ultrasound imaging system. The hypoxia in cardiac tissues was detected by the hypoxia probe method. The apoptosis of cardiac cells was determined by Tunel method. Results:Compared with the p21 + /-mice, the survival of p21 -/-mice was significantly shortened ( P=0.004), the interventricular septum was significantly thinned during the diastolic and systolic phases ( P=0.049, P=0.006), the left ventricular posterior wall was remarkably thickened ( P<0.001) and the left ventricular ejection fraction was significantly decreased ( P=0.004). The gross heart tissue was enlarged in the p21 -/-mice. HE staining showed the aggregation of inflammatory cells in cardiac tissues and disordered arrangement of myocardial cells. Significant hypoxia and apoptosis could be observed in the p21 -/-mouse heart tissues. Conclusions:p21 -/-mice are prone to more severe RIHD after irradiation, manifested with shortened cardiac survival, weakened cardiac function, abnormal cardiac structure, hypoxia and apoptosis of cardiac tissues. p21 plays an important role in the repair after cardiac irradiation.

Objective:To evaluate facial soft tissue 3-deminsion changes of skeletal Class Ⅲmalocclu-sion patients after orthognathic surgery using structure light scanning technique .Methods:Eight patients [3 males and 5 females, aged ( 27.08 ±4.42 ) years ] with Class Ⅲ dentoskeletal relationship who underwent a bimaxillary orthognathic surgical procedure involving advancement of the maxilla by Le FortⅠosteotomy and mandibular setback by bilateral sagittal split ramus osteotomy (BSSO) and genioplasty to correct deformity were included .3D facial images were obtained by structure light scanner for all the patients 2 weeks preoperatively and 6 months postoperatively .The facial soft tissue changes were evalua-ted in 3-dimension.The linear distances and angulation changes for facial soft tissue landmarks were ana-lyzed.The soft tissue volumetric changes were assessed too .Results: There were significant differences in the sagittal and vertical changes of soft tissue landmarks .The greatest amount of soft tissue change was close to lips.There were more volumetric changes in the chin than in the maxilla , and fewer in the forehead .Conclusion: After biomaxillary surgery , there were significant facial soft tissue differences mainly in the sagittal and vertical dimension for skeletal Class Ⅲ patients .The structure light 3 D scan-ning technique can be accurately used to estimate the soft tissue changes in patients who undergo orthog-nathic surgery .