Résumé
Objective@#To investigate the effect of small interfering RNA silencing the vitamin D receptor (VDR) on the biological behavior of prostate cancer PC-3 cells.@*METHODS@#We constructed the VDR-shRNA lentiviral vector and determined the mRNA and protein expressions of VDR by RT-PCR and Western blot. Using scratch wound healing and Transwell chamber assays, we detected the changes in the migration and invasiveness of the PC-3 cells after silencing VDR.@*RESULTS@#The VDR-shRNA plasmid significantly interfered the VDR expression and successfully screened the cell lines with stable VDR-shRNA interference. The rate of scratch wound healing was markedly lower in the VDR interference group than in the blank control and LV3 negative control groups (59% vs 73.6% and 77.8%, P 0.05), and so was the count of permeable cells (P 0.05). The migration ability and invasiveness of the VDR-treated cells were remarkably decreased as compared with those of the control cells.@*CONCLUSIONS@#Down-regulated expression of the VDR gene may reduce the migration and invasiveness of prostate cancer cells.
Sujets)
Humains , Mâle , Lignée cellulaire tumorale , Mouvement cellulaire , Génétique , Prolifération cellulaire , Régulation négative , Extinction de l'expression des gènes , Lentivirus , Invasion tumorale , Génétique , Plasmides , Tumeurs de la prostate , Génétique , Anatomopathologie , ARN messager , Métabolisme , Petit ARN interférent , Récepteur calcitriol , Génétique , Métabolisme , Transfection , Cicatrisation de plaie , GénétiqueRésumé
<p><b>OBJECTIVE</b>To compare efficacy of different adjuvant chemotherapy regimens for stage II-III gastric cancer after D2 gastrectomy in Asian patients.</p><p><b>METHODS</b>Associated literatures were searched through electronic databases and hand-searching. Prospective randomized clinical trials (RCTs) comparing adjuvant chemotherapy after D2 gastrectomy with surgery alone were included in the study. Overall survival and disease-free survival were chosen as the endpoints. Relative hazard was analyzed by Bucher adjusted indirect comparison.</p><p><b>RESULTS</b>Two RCTs were selected, including comparison between S-1 versus surgery alone and comparison between XELOX versus surgery alone. There was no statistical difference in overall survival between the two regimens (HR=0.94, 95%CI:0.62-1.44, P=0.79). The recurrence risk of S-1 was slightly higher as compared to XELOX, but no statistical difference was found (HR=1.11, 95%CI:0.80-1.53, P=0.54).</p><p><b>CONCLUSION</b>The adjuvant chemotherapy with S-1 is similar to XELOX for stage II-III gastric cancer after D2 gastrectomy in Asian patients.</p>