Glycogen synthase kinase-3beta (GSK-3beta) promotes proliferation of ovarian cancer cells in vitro / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the effect of glycogen synthase kinase-3beta (GSK-3beta) on the proliferation of human ovarian cancer cells.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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-3beta activity resulted in the increase of BrdU incorporation in SKOV3 cells compared with that in the control vector. On the contrary, transfection with GID5-6 to downregulate GSK-3beta activity decreased the BrdU incorporation in SKOV3 cells, compared with that in GID5-6LP, which is a control vector of GID5-6. Stable transfection with GSK-3betaS9A increased the colony number while stable transfection with GID5-6 decreased the colony number, compared with each control vector.</p><p><b>CONCLUSION</b>GSK-3beta can promote the proliferation of ovarian cancer cells. Inhibition of GSK-3 p may become a potential theraputic</p>

Expression and significance about VEGF, KDR, MMP-1, and transcription factor Ets-1 in human cervical carcinoma / 中国医学科学院学报

<p><b>OBJECTIVE</b>To study the expression of VEGF, KDR, MMP-1, and its transcription factor Ets-1 on the interstitial neovasculogenesis in human cervical carcinoma on molecular level, which may provide further theoretic bases on judgement of prognosis and explain interregularity between neovasculagenetic factors.</p><p><b>METHODS</b>VEGF, KDR, MMP-1, and Ets-1 were detected in 87 cervical carcinomas by in situ hybridization and immunohistochemistry. The survival curves for patients with detected tumors were compared with the curves for those without tumors. Multivariate analyses were performed with Pearson analysis.</p><p><b>RESULTS</b>VEGF mRNA and its protein were mainly expressed in cytoplasms of tumor cells, positive rate was 78.6% (68/87) and 70.4% (61/87) respectively. KDR mRNA and its protein were mainly expressed in vascular endothelial cells, as correlation coefficient between KDR and VEGF was 0.892. Over expression of MMP-1 was seen in both endothelial cells and tumor cells, especially in hyperplasia of endothelial cells. Ets-1 was mainly expressed in both endothelial cells and tumor cells, correlation coefficient between Ets-1 and KDR, MMP-1, was 0.900 and 0.873, respectively. Four factors of above were highly related with tumor differentiation, lymph nodes metastasis as well as 5 years survival rate.</p><p><b>CONCLUSIONS</b>VEGF, KDR, MMP-1, and Ets-1 are important factors on neovasculogenesis in cervical carcinoma, which may be considered to be reference indicator for determining biology behavior of cervical carcinoma, and may provide further theoretic bases on antineovasculagenetic therapy.</p>

Clinical features and prognostic factors of malignant ovarian teratoma / 中国医学科学院学报

<p><b>OBJECTIVE</b>To assess the clinical features and prognostic factors of malignant ovarian teratoma.</p><p><b>METHODS</b>Eighty-four patients with malignant ovarian teratoma between 1954 and 2001 were studied retrospectively. All patients were treated with surgery, the mid-period of follow-up was 146 months. Patient characteristics, surgical therapy, pathologic diagnosis, histological grade, and follow-up data were extracted and survival curves were depicted. Statistical analysis was performed using SPSS software version 10.0.</p><p><b>RESULTS</b>The average age was (33.5 +/- 16.1) years. Abdominal pain and abdominal extension were the main complaint. Thirty-seven women were diagnosed with malignant transformation of ovarian teratoma while 47 were of ovarian immature teratoma. Clinical stage was the only prognostic factor with significantly statistical differentiation. Five-year survival rate of malignant ovarian teratoma with stage I, II, III, and IV were (87.20 +/- 4.52)%, (50.00 +/- 35.36)%, (30.55 +/- 9.43)%, and 0.00%, respectively (P = 0.00). Five-year survival rate of ovarian immature teratoma with histological grade I, II, and III were (90.48 +/- 6.41)%, (68.75 +/- 11.59)%, and (57.14 +/- 16.38)%, respectively (P = 0.08). Among 31 women died of malignant ovarian teratoma, 27 (87.1%) died within 2 years after operation.</p><p><b>CONCLUSION</b>This retrospective study suggests that malignant transformation of ovarian teratoma is clinically different from ovarian immature teratoma. Complete staging surgery or Debulking surgery followed by 4-6 courses adjuvant chemotherapy with cisplatin, vincristine, and bleomycin are the principle treatment. Conservative surgery may well improve the life quality of younger patients. All patients should be closely followed up for at least 2 years.</p>

Intermediate-conductance-Ca~(2+)-activated K~+ channels are overexpressed in endometrial cancer and involved in regulating proliferation of endometrial cancer cells / 中华妇产科杂志

Objective To study the expression of intermediate-conductance-Ca~(2+)-activated K~+ (IKCa1)channels in endometrial cancer and its role in regulating proliferation of endometrial cancer cells. Methods Western blot and RT-PCR were used to examine the expression of IKCa1 channels in 13 normal endometrial specimens and 25 endometrial cancer specimens;and RNA interference(RNAi),[ ~3H ] thymidine incorporation,and inhibitor of IKCa1 channel were used to explore the role of IKCa1 channels in regulation of proliferation of endometrial cancer cells HEC-1A.Results The expression rate and level of IKCa1 mRNA in endometrial carcinoma(84%,0.89?0.52)were higher than in normal endometria(8%, 0.14?0.12;P

Effects of estrogen receptor ? on proliferation of ovarian clear cell adenocarcinoma ES-2 in vitro and in vivo / 中华妇产科杂志

Objective To investigate the involvement of estrogen receptor(ER)? in the proliferation of ovarian clear cell adenocarcinoma by restoring ER? expression in a cell line ES-2.Methods A plasmid with full length ER? cDNA,pRSV-ER? and its negative vector control pRSV were introduced into ES-2.The cells transfected were named according to the plasmids:ES-pRSV,ES-pRSV-ER?.RT-PCR and western blot were used to detect the expression of ER? in ES-2,ES-pRSV and ES-pRSV-ER? cells.The growth activities of cells in vitro were detected by methyl thiazolyl tetrazolium(MTT)assay,and in vivo growth in nude mice was also observed.Flow cytometry was performed to show the change of cell cycles. Results The ES-pRSV-ER? cells were identified with ER? mRNA and protein expression.The growth activities of ES-pRSV-ER? were inhibited in vitro.In MTT analysis,the values of ES-2,ES-pRSV,and ES- pRSV-ER? cells were 0.78?0.05,0.81?0.06,and 0.53?0.07(the third was lower compared with the former two,P