Objective To characterize and compare the different biological behaviors of two novel human osteosarcoma cell lines,Zos and Zos-M,established respectively from the primary site and the skip metastasis of an osteosarco...Objective To characterize and compare the different biological behaviors of two novel human osteosarcoma cell lines,Zos and Zos-M,established respectively from the primary site and the skip metastasis of an osteosarcoma patient.Methods Two展开更多
The effect of forskolin, an activator of adenylate cyclase, on glucocorticoid-induced modulation of proliferation and differentiation of a human osteosarcoma cell line(HOS-8603) was iniually studied. It was found that...The effect of forskolin, an activator of adenylate cyclase, on glucocorticoid-induced modulation of proliferation and differentiation of a human osteosarcoma cell line(HOS-8603) was iniually studied. It was found that forskolin could significantly augment展开更多
This study is to examine the effect of human recombinant soluble TRAIL （TNF-related apoptosis-inducing ligand） protein inducing apoptosis in MG-63 human osteosarcoma cells. The inhibitive rates of TRAIL to MG-63 cel...This study is to examine the effect of human recombinant soluble TRAIL （TNF-related apoptosis-inducing ligand） protein inducing apoptosis in MG-63 human osteosarcoma cells. The inhibitive rates of TRAIL to MG-63 cells were detected by MTT assay. The apoptosis induced by TRAIL in MG-63 human osteosarcoma cells was analyzed with FACS and TUNEL and the apoptotic bodies were observed by transmission electron microscope. MTT assay showed that the inhibitive rates of 500, 1 000, 2 000 and 4 000 ng/mL TRAIL for 24 h were 10.1%, 24.3%, 50.6% and 97.7% respectively. Flow cytometric analysis showed that after MG-63 cells were treated with 2 gg/mL TRAIL for 6 h, obvious apoptotic peak would immediately appear before diploid peak. Human soluble TRAIL protein can quickly kill MG-63 osteosarcoma cells selectively, and may have potential value for clinical treatment of osteosarcoma.展开更多
The outcome of patients with osteosarcoma has not significantly improved in the last three decades. Therefore, there is still a need for the development of more effective therapeutic strategies. Methoxyamine (MX) is a...The outcome of patients with osteosarcoma has not significantly improved in the last three decades. Therefore, there is still a need for the development of more effective therapeutic strategies. Methoxyamine (MX) is a base excision repair (BER) inhibitor that has shown anticancer potential by sensitizing a variety of tumor cells to ionizing radiation and chemotherapeutic drugs. In the present study, the in vitro antiproliferative effects of MX were evaluated in two osteosarcoma cell lines, HOS and MG-63. Evaluation of the influence on radiosensitivity and drug interactions in simultaneous treatments with methotrexate, doxorubicin, and cisplatin was also performed. Exposure to MX significantly decreased cell proliferation and mediated a substantial increase of apoptosis. Moreover, our results showed that MX synergized with ionizing radiation in both cell lines while potentiated the antitumor effects of cisplatin and methotrexate. Altogether, the results presented herein demonstrate the feasibility of inhibiting the BER pathway, which may in future be a promising strategy for overcoming intrinsic tumor resistance and to improve the outcome of patients with osteosarcoma.展开更多
The most frequent cause of death of patients with osteosarcoma is the metastasis of tumour cells. In spite of successful control of the primary tumour, the mortality of the patients due to metastatic spread is more th...The most frequent cause of death of patients with osteosarcoma is the metastasis of tumour cells. In spite of successful control of the primary tumour, the mortality of the patients due to metastatic spread is more than 30% within 5 years. 1 Recent studies about osteosarcoma metastatic mechanism are based on osteosarcoma matrilineal cell lines. 2 For further studies of metastatic mechanism of osteosarcoma the establishment of a better metastatic experimental model of osteosarcoma is needed. We isolated and established two cell sublines, with high and low metastatic potentials, respectively, derived from human osteosarcoma MG-63 cell line by cloning in vitro and transplantation in vivo , then analysed and identified their biological characteristics.展开更多
文摘Objective To characterize and compare the different biological behaviors of two novel human osteosarcoma cell lines,Zos and Zos-M,established respectively from the primary site and the skip metastasis of an osteosarcoma patient.Methods Two
文摘The effect of forskolin, an activator of adenylate cyclase, on glucocorticoid-induced modulation of proliferation and differentiation of a human osteosarcoma cell line(HOS-8603) was iniually studied. It was found that forskolin could significantly augment
基金Supported by the Natural Science Foundation of HubeiProvince (2003ABA163)Specialized Research Fund for the Doctoral Pro-gram of Higher Education (20060486049)
文摘This study is to examine the effect of human recombinant soluble TRAIL （TNF-related apoptosis-inducing ligand） protein inducing apoptosis in MG-63 human osteosarcoma cells. The inhibitive rates of TRAIL to MG-63 cells were detected by MTT assay. The apoptosis induced by TRAIL in MG-63 human osteosarcoma cells was analyzed with FACS and TUNEL and the apoptotic bodies were observed by transmission electron microscope. MTT assay showed that the inhibitive rates of 500, 1 000, 2 000 and 4 000 ng/mL TRAIL for 24 h were 10.1%, 24.3%, 50.6% and 97.7% respectively. Flow cytometric analysis showed that after MG-63 cells were treated with 2 gg/mL TRAIL for 6 h, obvious apoptotic peak would immediately appear before diploid peak. Human soluble TRAIL protein can quickly kill MG-63 osteosarcoma cells selectively, and may have potential value for clinical treatment of osteosarcoma.
文摘The outcome of patients with osteosarcoma has not significantly improved in the last three decades. Therefore, there is still a need for the development of more effective therapeutic strategies. Methoxyamine (MX) is a base excision repair (BER) inhibitor that has shown anticancer potential by sensitizing a variety of tumor cells to ionizing radiation and chemotherapeutic drugs. In the present study, the in vitro antiproliferative effects of MX were evaluated in two osteosarcoma cell lines, HOS and MG-63. Evaluation of the influence on radiosensitivity and drug interactions in simultaneous treatments with methotrexate, doxorubicin, and cisplatin was also performed. Exposure to MX significantly decreased cell proliferation and mediated a substantial increase of apoptosis. Moreover, our results showed that MX synergized with ionizing radiation in both cell lines while potentiated the antitumor effects of cisplatin and methotrexate. Altogether, the results presented herein demonstrate the feasibility of inhibiting the BER pathway, which may in future be a promising strategy for overcoming intrinsic tumor resistance and to improve the outcome of patients with osteosarcoma.
基金Theprojectwassupportedbythe973ProjectofChina (No 2002CB513107)
文摘The most frequent cause of death of patients with osteosarcoma is the metastasis of tumour cells. In spite of successful control of the primary tumour, the mortality of the patients due to metastatic spread is more than 30% within 5 years. 1 Recent studies about osteosarcoma metastatic mechanism are based on osteosarcoma matrilineal cell lines. 2 For further studies of metastatic mechanism of osteosarcoma the establishment of a better metastatic experimental model of osteosarcoma is needed. We isolated and established two cell sublines, with high and low metastatic potentials, respectively, derived from human osteosarcoma MG-63 cell line by cloning in vitro and transplantation in vivo , then analysed and identified their biological characteristics.
