Effect of ATP50 on GH-induced testosterone secretion in isolated rat Leydig cells / 重庆医科大学学报

Objective:Toinvestigate the effect of ATP50 on GH-induced testosterone secretion in isolated SD rat Leydigcells.Methods:The Leydig cells were treated with ATP50 antisense oligodeoxynucletides(Anti-ODN)in GH group,nonsense tat ODN in control group,cAMP and testosterone in culture medium was detected by radioimmunoassay,expression of ATP50 protein was investigated by immunohistochemistry.Results:Antisense ATP50 ODN significantly inhibited GH-induced testosterone secretion of isolated rat Leydig cells in a dose-dependent manner(P

Study of blockading Stat3 by transcription factor decoy-ODN inhibiting the proliferation of breast cancer cell line MDA-MB-231 / 中国免疫学杂志

Objective:To investigate the mechanisms of decoy oligodeoxynucleotides(decoy-ODN) blockading Stat3 that inhibit breast cancer cells MDA-MB-231 proliferation.Methods:Stat3 decoy-ODN and scramble control were transfected into breast cell line MDA-MB-231, respectively. The cell proliferation capability was detected by cell counting; flow cytometry was applied to detect MDA-MB-231 cell cycle; FITC labeled decoy was observed by Reflected Light Fluorescence Microscope; the expression of the gene controlled by Stat3 was examined by means of RT-PCR and Western blot assay.Results:Stat3 decoy-ODN could be internalized into MDA-MB-231 cells and inhibit the growth of MDA-MB-231 cell via inducing its apoptosis. Stat3 decoy-ODN also could significantly reduce the expression of Stat3 controlling genes such as Bcl-xl,c-myc and CylinD1.Conclusion:Stat3 decoy-ODN can inhibit breast cell line MDA-MB-231 proliferation by blockading JAK/STAT pathway. This suggests that transcription factor decoy-ODN may serve as a novel therapeutic strategy for breast cancer.