PMID: 17415999Apr 10, 2007Paper

Glycogen synthase kinase-3beta (GSK-3beta) promotes proliferation of ovarian cancer cells in vitro

Zhonghua zhong liu za zhi [Chinese journal of oncology]
Qi Cao, You-ji Feng


To investigate the effect of glycogen synthase kinase-3beta (GSK-3beta) on the proliferation of human ovarian cancer cells. Two human ovarian cancer cell lines SKOV3 and ES-2 were analysed for the expression of GSK-3beta and phosphorylated GSK-3beta (pGSK-3beta) by Western blot analysis. Cell growth curve analysis done by cell count was used to investigate the effect of GSK-3beta inhibitors on the growth of SKOV3 and ES-2 cells. Four plasmids, namely, GSK-3betaS9A, GID5-6, GID5-6LP and the control vector, were cotransfected respectively with the green fluorescent protein (GFP) into SKOV3 cells by electroporation, and then BrdU incorporation assay was adopted to analyse the role of GSK-3beta activity in the proliferation of ovarian cancer cells. After transfection, G418 was added to the medium to select those stably transfected cells, which were used to investigate the long term effect of GSK-3beta activity change on the proliferation of ovarian cancer cells by colony formation assay. Both SKOV3 and ES-2 cells expressed GSK-3beta, though the expression level of pGSK-3beta was lower in SKOV3 than in ES-2 cells. GSK-3beta inhibitors attenuated the growth of SKOV3 and ES-2 cells. Transfection with GSK-3betaS9A to upregulate the GSK...Continue Reading

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