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      1. Author :
        Pan, Y.; Zhong, L. J.; Zhou, H.; Wang, X.; Chen, K.; Yang, H. P.; Xiaokaiti, Y.; Maimaiti, A.; Jiang, L.; Li, X. J.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
      5. Publication :
        Acta Pharmacol Sin
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      11. Keywords :
        IVIS, B16-F10-luc-G5, B16F10-luc-G5, B16-F10-luc, B16F10-luc, 14-3-3 Proteins/*genetics; Animals; Anticoagulants/pharmacology/*therapeutic use; Antineoplastic Agents/pharmacology/*therapeutic use; Apoptosis/drug effects; Cadherins/genetics; Cell Cycle/drug effects; Cell Line, Tumor; Cell Proliferation/*drug effects; Gene Expression Regulation, Neoplastic/drug effects; Heparin/pharmacology/*therapeutic use; Humans; Male; Mice; Mice, Inbred BALB C; Mice, Nude; Neoplasm Metastasis/drug therapy/genetics; Neoplasms/*drug therapy/genetics; Prostate/drug effects/metabolism; Prostatic Neoplasms/drug therapy/genetics; Transforming Growth Factor beta/genetics; Vimentin/*genetics
      12. Abstract :
        AIM: To investigate the inhibitory effects of heparin on PC-3M cells proliferation in vitro and B16-F10-luc-G5 cells metastasis in Balb/c nude mice and identify the protein expression patterns to elucidate the action mechanism of heparin. METHODS: Human prostate cancer PC-3M cells were incubated with heparin 0.5 to 125 mug/mL for 24 h. The proliferation of PC-3M cells was assessed by MTS assay. BrdU incoporation and Ki67 expression were detected using a high content screening (HCS) assay. The cell cycle and apoptosis of PC-3M cells were tested by flow cytometry. B16-F10-luc-G5 cardinoma cells were injected into the lateral tail vein of 6-week old male Balb/c nude mice and heparin 30 mg/kg was administered iv 30 min before and 24 h after injection. The metasis of B16-F10-luc-G5 cells was detected by bioluminescence assay. Activated partial thromboplastin time (APTT) and hemorheological parameters were measured on d 14 after injection of B16-F10-luc-G5 carcinoma cells in Balb/c mice. The global protein changes in PC-3M cells and frozen lung tissues from mice burdened with B16-F10-luc-G5 cells were determined by 2-dimensional gel electrophoresis and image analysis. The protein expression of vimentin and 14-3-3 zeta/delta was measured by Western blot. The mRNA transcription of vimentin, transforming growth factor (TGF)-beta, E-cadherin, and alpha(v)-integrin was measured by RT-PCR. RESULTS: Heparin 25 and 125 mug/mL significantly inhibited the proliferation, arrested the cells in G(1) phase, and suppressed BrdU incorporation and Ki67 expression in PC-3M cells compared with the model group. But it had no significant effect on apoptosis of PC-3M cells. Heparin 30 mg/kg markedly inhibits the metastasis of B16-F10-luc-G5 cells on day 8. Additionally, heparin administration maintained relatively normal red blood hematocrit but had no influence on APTT in nude mice burdened with B16-F10-luc-G5 cells. Thirty of down-regulated protein spots were identified after heparin treatment, many of which are related to tumor development, extracellular signaling, energy metabolism, and cellular proliferation. Vimentin and 14-3-3 zeta/delta were identified in common in PC-3M cells and the lungs of mice bearing B16-F10-luc-G5 carcinoma cells. Heparin 25 and 125 mug/mL decreased the protein expression of vimentin and 14-3-3 zeta/delta and the mRNA expression of alpha(v)-integrin. Heparin 125 mug/mL decreased vimentin and E-cadherin mRNA transcription while increased TGF-beta mRNA transcription in the PC-3M cells, but the differences were not significant. Transfection of vimentin-targeted siRNA for 48 h significantly decreased the BrdU incoporation and Ki67 expression in PC-3M cells. CONCLUSION: Heparin inhibited PC-3M cell proliferation in vitro and B16-F10-luc-G5 cells metastasis in nude mice by inhibition of vimentin, 14-3-3 zeta/delta, and alpha(v)-integrin expression.
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      14. Call Number :
        PKI @ kd.modi @ 13
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