目的 探讨骨巨细胞瘤细胞自噬特征及其对细胞增殖的作用.方法 体外培养骨巨细胞瘤细胞(GCT-0404细胞),分别采用血清饥饿、雷帕霉素以及抑制剂氯喹进行处理,Western blot检测自噬相关蛋白LC3、Beclin 1的表达;免疫荧光显示细胞内自噬体的形成;倒置相差显微镜下观察细胞形态学变化;CCK-8检测细胞的活性.结果 血清饥饿、雷帕霉素以及氯喹干预GCT-0404细胞,可使LC3-I向LC3-Ⅱ的转化水平明显增高(P＜0.05);绿色荧光的斑点增多;而Beclin 1的表达水平无显著变化.同时,干预处理后细胞形态发生了显著变化,并抑制细胞增殖(P＜0.05).结论 血清饥饿、雷帕霉素以及抑制剂氯喹干预GCT-0404细胞所致自噬的发生及其自噬流的变化可参与对细胞增殖抑制的调控.%Purpose To investigate the autophagy characteristics of giant cell tumor of bone and its effect on cell proliferation. Methods Giant cell tumors of bone (GCT-0404 cells) were cultured in vitro and treated with serum-starvation, rapamycin and inhibitor chloroquine. Western blot analysis was performed to detect the autophagic markers LC3 and Beclin 1 expression. Immunofluorescence method was used to show intracellular autophagy formation. Inverted microscope was used to observe the cell morphology. CCK-8 assays were used to detect the cell viability. Results Green fluorescent spots that represented the transformation level of LC3-I to LC3-Ⅱ increased significantly (P＜0.05) by serum-starvation, rapamycin and inhibitor chloroquine respectively, but the expression level of Beclin 1 was not raised. In addition, the cell morphology changed significantly, and cell proliferation was inhibited after serum-starvation, and treatment with rapamycin and inhibitor chloroquine (P＜0.05), Conclusion The changes of autophagy caused by serum starvation, rapamycin and inhibitor chloroquine in GCT-0404 cells may be involved in the down-regulation of cell proliferation.
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