| 糜宝国,关邯峰,刘常宇,等.不同浓度地西他滨对破骨细胞分化的影响.骨科,2016,7(2): 120-124. |
| 不同浓度地西他滨对破骨细胞分化的影响 |
| Effect of different concentrations of decitabine on osteoclast differentiation |
| 投稿时间：2015-09-03 |
| DOI：10.3969/j.issn.1674-8573.2016.02.012 |
| 中文关键词: 破骨细胞 细胞分化 RNA干扰 |
| 英文关键词: Osteoclasts Differentiation RNA interference |
| 基金项目:中央高校基本科研业务费专项基金资助（2014TS074）；湖北省自然科学基金（2014CFB196） |
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| 中文摘要: |
| 目的 探讨不同浓度梯度地西他滨对破骨细胞形成、活性及吸收功能的影响。方法 不同浓度地西他滨（0、0.1、0.25和0.5 μmol/L）处理单核巨噬（RAW264.7）细胞。通过4’，6-联眯-2-苯基吲哚（4,6-Diamidino-2-phenylindole dihydrochloride, DAPI）染色和微丝绿色荧光探针（F-actin-Trakcer Green）染色后观察F-actin环的形成即破骨细胞轮廓；抗酒石酸酸性磷酸酶检测试剂盒检测细胞上清中的抗酒石酸酸性磷酸酶活性，骨板吸收实验检测破骨细胞的骨吸收能力；Q-PCR实验检测破骨细胞标志基因抗酒石酸酸性磷酸酶（tartrate-resistant acid phosphatase, TRAP）、组织蛋白酶K（cathepsin K, CK）和脊髓基质金属蛋白酶-9（matrix metalloproteinase-9, MMP-9）的mRNA表达。结果 不同浓度地西他滨抑制核因子NF-κB配体激活因子（receptor activator of NF-κB ligand, RANKL）诱导RAW264.7细胞形成F-actin环，降低了破骨细胞的TRAP酶活性，抑制了破骨细胞的骨吸收能力，同时也下调了破骨细胞标志基因TRAP、CK和MMP-9的mRNA表达。且随着药物浓度的增高，上述的抑制作用越明显。结论 地西他滨抑制破骨细胞形成、活性和骨吸收能力，且这种抑制作用随着药物浓度的增加而逐渐增强。 |
| 英文摘要: |
| Objective To explore the effect of different concentrations of decitabine on osteoclast formation, activity and osteoclasts resorptive capacity. Methods RAW264.7 cells were treated with decitabine at different concentrations (0, 0.1, 0.25, 0.5 μmol/L). Osteoclast differentiation was assessed by DAPI and F-actin-Trakcer Green staining tests. Tartrate-resistant acid phosphatase kit was used to evaluate TRAP activity. Osteoclasts resorptive capacity was detected by bone resorption test. The expression of osteoclast specific genes like TRAP, capthesin K, and MMP-9 mRNA was detected by RT-PCR. Results Different concentrations of decitabine inhabited RANKL-stimulated osteoclastogenesis in RAW264.7 cell culture, as manifested by decrease of F-actin rings formation, TRAP activity and osteoclasts resorptive capacity in a dose-dependent manner, and also down-regulated TRAP, CK, and MMP-9 mRNA expression. Conclusion Decitabine inhabited osteoclast formation, activity and osteoclasts resorptive capacity in a dose-dependent manner. |
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