Journal: Oncotarget

Article Title: Adipose-derived mesenchymal stem cells promote osteosarcoma proliferation and metastasis by activating the STAT3 pathway

doi: 10.18632/oncotarget.15866

Figure Lengend Snippet: (A) The transfection efficiency of the siRNA was analysed in OS cells at different time points after transfection using flow cytometry. (B) Western blot analysis of STAT3 and pSTAT3 expression in OS cells treated with ADSC-conditioned medium. OS cells were pretreated with the STAT3 siRNA (50 nM) for 48 h before treatment with ADSC-conditioned medium for an additional 12 h. STAT3 expression levels were detected by western blotting. OS cells treated with Lipofectamine 2000 alone served as negative controls. (C) OS cell invasion was analysed using transwell assay. OS cells were transfected with the siRNA and treated with ADSC-conditioned medium. OS cells treated with ADSC-conditioned medium alone served as positive controls, and OS cells treated with Lipofectamine 2000 alone served as negative controls. (D) The MMP2 and MMP9 levels in the supernatants were detected using ELISAs. (E) OS cells were treated with the STAT3 siRNA or ADSC-conditioned medium, and MMP2/9 and E-cadherin expression in OS cells was examined by western blotting. OS cells treated with Lipofectamine 2000 alone served as negative controls. The results are expressed as mean±SD. Abbreviation: C Control; L Lipofectamine 2000; S siRNA. * P<0.05, ** P<0.01, *** P<0.001.

Article Snippet: Antibody staining with 100 μL of specific antibodies against human STAT3 (1:100 dilution; R&D Systems) and rabbit monoclonal antibodies against human Ki67, MMP2 and MMP9 (1:100 dilution; ProteinTech groups inc, Chicago, IL) was applied to the cells, which were incubated overnight at 4°C.

Techniques: Transfection, Flow Cytometry, Western Blot, Expressing, Transwell Assay, Control

Journal: Oncotarget

Article Title: Adipose-derived mesenchymal stem cells promote osteosarcoma proliferation and metastasis by activating the STAT3 pathway

doi: 10.18632/oncotarget.15866

Figure Lengend Snippet: (A-B) Cell proliferation was evaluated using the CCK8 assay and EdU analysis. OS cells were transfected with the siRNA and treated with ADSC-conditioned medium. OS cells treated with ADSC-conditioned medium alone served as positive controls, and OS cells treated with Lipofectamine 2000 alone served as negative controls. (C-D) OS cells were transfected with the STAT3 siRNA or treated with ADSC-conditioned medium, and apoptosis rates were determined using flow cytometry. OS cells treated with Lipofectamine 2000 alone served as negative controls. The percentages of Annexin V-positive cells are presented in bar charts. *** P<0.001.

Article Snippet: Antibody staining with 100 μL of specific antibodies against human STAT3 (1:100 dilution; R&D Systems) and rabbit monoclonal antibodies against human Ki67, MMP2 and MMP9 (1:100 dilution; ProteinTech groups inc, Chicago, IL) was applied to the cells, which were incubated overnight at 4°C.

Techniques: CCK-8 Assay, Transfection, Flow Cytometry

Journal: Oncotarget

Article Title: Adipose-derived mesenchymal stem cells promote osteosarcoma proliferation and metastasis by activating the STAT3 pathway

doi: 10.18632/oncotarget.15866

Figure Lengend Snippet: (A) An in vivo imaging system was used to monitor OS xenograft luminescence activity, which represented tumour growth and metastasis. (B) Living Image Software was used to analyse tumour bioluminescence intensity weekly. The quantitation of the normalized image counts is shown. (C) Lungs of the tumour-bearing mice were excised, and the bioluminescence intensity was analysed to determine the level of tumour metastasis in the lungs. (D) Survival curves of the three groups are shown, and the median survival of the OS group was 43 days, which was significantly longer than the survival of the OS + conditioned-medium group (25 days, P<0.01). (E) The immunohistochemical analysis of Ki67, STAT3, MMP2 and MMP9 expression in the orthotopic tumour xenografts is shown. (F) Quantitation of the intensity of Ki67, STAT3 and MMP2/9 staining in the xenografts. Scale bar: 25 μm. * P<0.05, ** P<0.01, *** P<0.001.

Article Snippet: Antibody staining with 100 μL of specific antibodies against human STAT3 (1:100 dilution; R&D Systems) and rabbit monoclonal antibodies against human Ki67, MMP2 and MMP9 (1:100 dilution; ProteinTech groups inc, Chicago, IL) was applied to the cells, which were incubated overnight at 4°C.

Techniques: In Vivo Imaging, Activity Assay, Software, Quantitation Assay, Immunohistochemical staining, Expressing, Staining