ABSTRACT
<p><b>OBJECTIVE</b>To investigate the expression of La protein in cervical cancer tissues and explore its role in the occurrence and progression of cervical cancer.</p><p><b>METHODS</b>The expression of La protein in cervical cancer and normal cervical tissues was detected by immunohistochemical staining. RNA interference technology was used to silence La protein expression in HeLa cells and the changes in cell proliferation, tumor sphere formation and cell cycles were investigated.</p><p><b>RESULTS</b>The expression of La protein was significantly higher in cervical cancer tissues than in normal cervical tissues (61% vs 9%, P<0.05). Silencing La protein expression in HeLa cells caused significantly reduced the cell proliferation and lowered the tumor sphere formation rate from the control level of (17.1=1.92)% to (6.3=0.45)% (P<0.05), resulting also in G0/G1 cell cycle arrest and reduced cyclin D1 protein expression.</p><p><b>CONCLUSION</b>The RNA binding protein La can promote the development of cervical cancer and may play a critical role in the carcinogenesis and progression of cervical cancer.</p>
Subject(s)
Female , Humans , Autoantigens , Metabolism , Cell Cycle Checkpoints , Cyclin D1 , Metabolism , HeLa Cells , RNA Interference , RNA-Binding Proteins , Metabolism , Ribonucleoproteins , Metabolism , Uterine Cervical Neoplasms , Metabolism , PathologyABSTRACT
Objective To preliminarily investigate the effect of PBL applied in teaching of Obstetrics and Gynecology. Methods Ninety eight students were randomly divided into PBL pedagogy group and traditional pedagogy group in clinical practice teaching of dysfunctional uterine bleeding. Exam scores were assessed and opinion survey was summarized. Results The exam score was 80.7 ± 5.6 of PBL pedagogy group and 76.3 ± 4.9 of the other group respectively. There was significant difference between the scores of the two groups (P <0.05). Most students consider that PBL pedagogy was of benefit to students' ability. Conclusion PBL pedagogy has more advantages in training of clinical thinking than traditional teaching method.
ABSTRACT
Template direct dye-terminator incorporation with fluorescence-polarization (TDI-FP assay) is a technology for genotyping single nucleotide polymorphisms (SNPs). To apply this method in analyses of A647G variation in human papillomavirus (HPV) 16 E7 gene from HPV 16-positive cervical tissues, a total of 91 and 49 HPV 16-positive DNA samples obtained from women with cervical cancer and normal/inflamed cervices living in Shaanxi in northwest China were subjected to the partial E7 gene PCR with nucleotide (nt) 647 in the products. Then, the oligonucleotide probe designed to anneal immediately to nt 647 was hybridized to the template within the PCR amplicons, and extended specifically by TAMRA-ddTTP or R110-ddCTP directed by the base at nt 647. The increasing FP values were read and the base at nt 647 was identified. The prevalence of nt 647 A→G was 35.71% (50/140). The variation 647G detected in 42.86% (39/91) of women with cervical cancer was significantly higher than 22.45% (11/49) detected in those with normal/inflamed cervices (x2 = 5.778, P = 0.016). The odds ratio (OR) between these two groups was 2.59 (95% confidence interval=l.17～5.71). The results demonstrate that TDI-FP method can be potentially applied in analysis of interest point mutations in HPVs. The incidence and risk implication of HPV 16 A647G variant infection in Shaanxi, China, displays significant geographic difference from other areas. The HPV 16 with E7 gene A647G point mutation appears to have a higher risk for invasive cervical cancer in women living in Shaanxi.