ABSTRACT
Objective To investigate the expression of miR-200c in endometrial carcinoma and its correlation with ZEB2 protein. Methods The expression levels of miR-200c and ZEB2 gene and protein in tissues were detected. The expression of miR-200c in endometrial carcinoma RL95-2 cell line was inhibited by using antisense oligonucleotides and its effect on cell invasiveness was tested. The expressions of ZEB2 gene and protein in cells were detected. Results The expression levels of miR-200c and ZEB2 mRNA and protein in endometrial tissues were significantly higher than those in adjacent tissues and control group (P < 0.05). The average penetrating number in antisense miR-200c transfected group was significantly less than negative control group and liposome group (P < 0.05). The expression levels of ZEB2 gene and protein in antisense miR-200c transfected group were lower than the negative control group and liposome group (P < 0.05). Conclusion The expression of mRNA-200c in endometrial carcinoma was high and it might be promoting tumor cell invasion and metastasis by regulating ZEB2.
ABSTRACT
The purpose of this study was to investigate the effect of isopropyl myristate (IPM), a penetration enhancer, on the viscoelasticity and drug release of a drug-in-adhesive transdermal patch containing blonanserin. The patches were prepared with DURO-TAK87-2287 as a pressure-sensitive adhesive (PSA) containing 5% (/) of blonanserin and different concentrations of IPM. Anrelease experiment was performed and the adhesive performance of the drug-in-adhesive patches with different concentrations of IPM was evaluated by a rolling ball tack test and a shear-adhesion test. The glass transition temperature () and rheological parameters of the drug-in-adhesive layers were determined to study the effect of IPM on the mechanical properties of the PSA. The results of therelease experiment showed that the release rate of blonanserin increased with an increasing concentration of IPM. The rolling ball tack test and shear-adhesion test showed decreasing values with increasing IPM concentration. The results were interpreted on the basis of the IPM-induced plasticization of the PSA, as evidenced by a depression of the glass transition temperature and a decrease in the elastic modulus. In conclusion, IPM acted as a plasticizer on DURO-TAK87-2287, and it increased the release of blonanserin and affected the adhesive properties of the PSA.
ABSTRACT
Objective To evaluate brush cytology under endoscopic retrograde cholangiopancreatography (ERCP) for malignant biliary strictures, and to analyze the factors influencing the diagnosis yield.Methods Brush cytology was applied in 144 patients with suspected malignant biliary strictures at ERCP.Brushing in bile duct was performed for 10 times from 2004 to 2006, while at least 20 times of brushing and repeated manipulation were performed at biliary strictures from 2007 to 2009. Cytological samples were processed immediately after brushing and analyzed by the same pathologist. Efficacy of brush diagnosis was evaluated based on reference to histopathology after surgery and/or clinical diagnostic criteria. Results Malignant stricture was finally diagnosed in 96 patients, and benign diseases in other 48. Brush cytology was positive in 78 of 96 patients with malignant stricture ( sensitivity 81.3% ), and negative in all patients without malignancy ( specificity 100. 0% ). Overall accuracy of diagnosis was 87.5%. Positive rate of malignancy by brush between 2007 and 2009 was 87.7% (50/57), while that between 2004 and 2006 was 71.8%, which were significantly different ( P ＜ 0. 05 ). The positive rate was not correlated with stricture location or tumor type. No major complications occurred, except for 4 moderate acute pancreatitis, 3 cholangiolitis and 2 biliary bleeding. Conclusion Brush cytology is of high sensitivity and specificity for malignant biliary stricture.Repeated brushing and manipulation can facilitate diagnosis yield.