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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Zheng, Zhe Liu, Jun-Ming Li, Zhibin Guan, Yan-Qing Liang, Lihua Zhang, Lin Du, Jinju |
| Copyright Year | 2012 |
| Abstract | The cell cycle arrest and apoptosis of human ovarian cancer OVCAR-3 cells, induced by three kinds of co-immobilized polylactic acid copolymer materials, compared with the corresponding control groups and free groups, are investigated in vitro. The three kinds of polylactic acid copolymers are PLGA (poly(lactic-co-glycolic acid)), PDLLA (poly(DL-lactic acid)), and PEG-PLGA (polyethylene glycol-poly(lactic-co-glycolic acid) copolymers). They are respectively photo-immobilized with TNF-α plus IFN-γ as the co-immobilized group, respectively mixed with TNF-α plus IFN-γ as the free group. First, the co-immobilized groups are prepared and examined by Fourier transform attenuated total reflection infrared spectroscopy (ATR-FTIR), atomic force microscopy (AFM), and electron spectroscopy for chemical analysis (ESCA). Second, the cell morphology, cell mortality, and cell cycle arrest of OVCAR-3 cells induced by the co-immobilized group are analyzed by ematoxylin staining and flow cytometry. Third, western immunoblot analysis of the protein expression of p53, Bax, and Bcl-2 and immunofluorescence analysis of the protein location of caspase-3 in the induced OVCAR-3 cells were also performed. The results show that the co-immobilized group shows more visible inhibition activity towards OVCAR-3 cells than the control group and free group, after a time of 48 hours and at a concentration level of 20 ng ml−1. The OVCAR-3 cells mediated by the co-immobilized group are individually arrested in the G1, G2, and S phases. Moreover, the western blotting and immunofluorescence analysis reveals that the treatment of OVCAR-3 cells by the co-immobilized group remarkably enhances the cellular expression of activated p53, Bax, and caspase-3, suggesting that the mitochondrial pathway of apoptosis may be significant. Our data thus provide the microscopic surface characterization and cell biology basis for utilizing the TNF-α plus IFN-γ co-immobilized polylactic acid copolymers as potential antitumorigenic targeted drugs. |
| Starting Page | 14746 |
| Ending Page | 14755 |
| Page Count | 10 |
| File Format | HTM / HTML PDF |
| ISSN | 09599428 |
| Volume Number | 22 |
| Issue Number | 29 |
| Journal | Journal of Materials Chemistry |
| DOI | 10.1039/c2jm31972a |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | PLGA ESCA Fourier Bax Cell cycle Apoptosis Ovarian cancer Acid Copolymer Polylactic acid Polyethylene Tumor necrosis factor alpha Interferon gamma Free group Fourier transform Infrared spectroscopy Atomic-force microscopy Electron spectroscopy Flow cytometry Protein P53 Bcl-2-associated X protein Bcl-2 Immunofluorescence Caspase Western blot Molecular biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Materials Chemistry |
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