AIM:To investigate the expression of microRNA-193b(miR-193b) in the cervical tissues, and fur-ther to explore the effect of silencing miR-193b on diamminedichloroplatinum ( DDP)-treated HeLa cell viability.METH-ODS:The expression levels of miR-193b in different cervical tissues were examined by qPCR.After transfection of miR-193b-inhibitor, the cell migration was determined by Transwell assay, the sensitivity of HeLa cells to DDP was measured by MTT assay, the protein levels of phosphate and tension homology deleted on chromsome ten ( PTEN), protein kinase B (Akt), p-Akt and p-glycoprotein(P-gp) were determined by Western blot.RESULTS:The mRNA level of miR-193b was significantly increased in the cervical cancer tissues compared with normal cervical tissues ( P<0.05) .Knockdown of miR-193b obviously inhibited migration and enhanced sensitivity to DDP of HeLa cells (P<0.05).Additionally, after transfec-tion of miR-193b-inhibitor, the expression of PTEN was increased, whereas the protein levels of p-Akt and P-gp were de-creased (P<0.05).CONCLUSION:miR-193b is highly expressed in the cervical cancer tissues.Inhibition of miR-193b augments the sensitivity to DDP of HeLa cells, at least in part, through PTEN-PI3K/Akt signaling pathway.

This paper pondered thoroughly the analysis of the mental status of earthquake victims,the preparation,operational measures and steps,and remarkable issues in post-earthquake psychological crisis intervention,in order to provide mental support for the post-earthquake reconstruction.

The quality of teaching staff is closely correlated with the development of students and educational career.Therefore,educational administrators should enhance their concepts of management,clarify requirement and quality of teaching staff under the circumstance of new curriculum reform,and explore effective approaches to enhancing the quality of teaching staff,so as to unceasingly improve the quality of teaching staff.

Phage display is a widely used gene engineering high technology.Through the display of exogenous peptides or proteins fused specific coat protein on the surface of phages,it is possible to construct proteins or peptides libraries and screen interesting proteins,peptides and antibodies successfully.Most commonly used phage display technology is phagemid/helper phage system,in which helper phages are essential for the replication and assembly of phagemid particles.In this review,in combination with the newest research dynamic status,we summarize phagemid/helper phage double-genome system.We mainly emphasized the features and mutation mechanisms of different helper phages.We also made some prospects for the future directions,in the meanwhile,we also expect that our experience can provide some help for further maturity of the technology.

Aim To investigate the effect of sulfur dioxide (SO2) on blood pressure and aortic structure of the spontaneous hypertensive rat(SHR).Methods Sixteen male SHRs at the age of 4 weeks were randomly divided into SHR control group and SHR+Na2SO3/NaHSO3 group,respectively.Another eight male WKY rats served as WKY control group.Five weeks later, the blood pressure was determined.The rat aortas were dyed with Hart's Method. The morphometric parameters including outer radius, lumen radius and the wall thickness were calculated by Leica workstation. The proliferative index (PI) of smooth muscle cells was detected by immunohistochemical assay.Results The blood pressure of SHR control increased compared with that of WKY control rats(P

Dust ; analysis ; Humans ; Occupational Exposure ; analysis ; Power Plants

Objective To compare the diagnosic performance of conventional 2D and 3D Cube MR imaging to identify complete and partial tears of anterior cruciate ligament(ACL).Methods Farty patients suspected of having tears of anterior cruciate ligament were prospectively studied by 3.0 T conventional 2D and 3D Cube MR imaging and arthroscopy.MR images were interpreted in consensus by two experienced radiologists,and the ACL was diagnosed as being normal,partially torn,or completely torn.Diagnostic accuracy of 2D and 3D Cube MR for the detection of both complete and partial tears of ACL was calculated using arthroscopy as the standard of reference.Area under curve (AUC) of both methods were calculated using ROC curves and were compared using Hanley& McNeil curve comparisions.Results Sixteen patients had intact ACL,12 had complete tear,and 12 had partial tear of the ACL at arthroscopy.For complete ACL tear,AUC of 2D MR and 3D Cube was 0.839 and 0.923 respectively,and there was no significant difference on ROC curves (Z =1.245,P =0.213).For partial ACL tears,AUC of 2D and 3D Cube MR were 0.643 and 0.881 respectively,and there was significant difference on ROC curves (Z =2.384,P =0.017).Conclusions Both 2D MR and 3D Cube MR have high sensitivity and specificity for identifying the complete ruptures of ACL.3D Cube MRI appears to be superior inidentifying partial rupture of ACL.

Objective To evaluate the value of pre-S1 Ag in combined detection of hepatitis B virus. Methods 288 patients' serums with chronicity type B hepatitis (CHB)were collected when they had been detected with HBV-DNA,HBVM or ALT/AST,and then ELISA assay were applied to detect pre-S1Ag. Results A total of 288 patients ,including 175 males and 113 females( their meso-age is 36.89 years old) were recruited into this study. 161 patients were pre-S1 Ag positive(68.4%), 197 patients' HBV DNA contents exceeded 5.0E + 2 copy/ml(55.9%) ,71patients were H BeAg positive (24.6%), 186 patients were HBeAg negative (64.58%). The rate of 64 patients' ALT and AST exceeded 0. 84, and their' ALT exceeded 40 u/ml ( 22. 2% ). 60 patients' AST exceeded 50 u/ml (20. 8% ). These patients were divided into pre-S1 Ag positive group and pre-S1 Ag group. In pre-S1 Ag positive group, 124 patients' HBV DNA contents exceeded 5.0E + 2 copy/ml( 62.9% ), 118 patients were HBeAg negative (59.8%). When HBV DNA content was less than 5.0E+2 copy/ml,pre-S1 Ag positive rate was 35.2% and pre-S1 Ag negative rate was 63.6%. when HBV DNA content was less than 5.0E + 3 copy/ml, pre-S1 Ag positive rate was 56.9% and pre-S1 Ag negative rate was 81.7%. When HBV DNA content exceeded 5.0E + 5 copy/ml but less than 5.0E + 8 copy/ml ,pre-S1 Ag positive rate was 33% and pre-S1 Ag negative rate was 14.3% ,so two groups had significant difference. Conclusion Pre-S1 Ag positive and HBeAg negative in the CHB patients serums signify virus replication,and it can help us decide prognosis.

Epstein-Barr virus (EBV) is a biological factor associated with gastric carcinoma. The prognosis of EBV-associated gastric car-cinoma (EBVaGC) is good because of its distinct clinicopathological features. The pathogenesis mechanism of EBVaGC is extensively in-vestigated at present. The development of molecular techniques has stimulated the research on the expression of EBV genes in EB-VaGC, thereby providing a theoretical foundation on the diagnosis, therapy, and prevention of EBVaGC. This article reviewed present research advances in EBV genes in EBVaGC.

Nasopharyngeal carcinoma (NPC) is prevalent in Southeast Asia, especially in the area of southern China. It is acknowl-edged that NPC is absolutely related to EBV infection. Nevertheless, there are just a few researches about the relationship between the level of EBV antibodies and the tumor stages and it hasn't come to conclusion. This review makes a summary on present research progress and would be valuable for the better understanding of the contribution of EBV antibodies to the tumor stages in NPC.