目的：研究肿瘤抑制可转移候选基因1(TSSC1)在胶质瘤组织中的表达及其对胶质瘤U87细胞生物学行为的影响。方法采用Real time-PCR和Western blot检测80例胶质瘤（Ⅰ期25例，Ⅱ期32例，Ⅲ期15例，Ⅳ期8例）组织和瘤旁组织中TSSC1的表达，采用化学合成的针对TSSC1基因的2个小干扰RNA(siRNA-TSSC1-1和siRNA-TSSC1-2)下调该基因的表达，通过MTT和Transwell法分别检测TSSC1对U87细胞增殖、迁移和侵袭的影响。结果TSSC1在胶质瘤组织中的表达低于相应的瘤旁组织，同时在临床分期Ⅲ期、Ⅳ期中较Ⅰ期表达降低，将siRNA-TSSC1-1和siRNA-TSSC1-2转染入U87细胞后，U87细胞中TSSC1 mRNA和蛋白表达水平都明显降低，细胞增殖能力显著增强，细胞的迁移和侵袭能力显著增强。结论 TSSC1有望成为胶质瘤早期诊断和预测预后的生物分子标志物。%Objective To evaluate the diagnostic value of TSSC1 in glioma patients and its influence on cell biologi-cal behavior of glioma U87 cells. Methods RT-PCR and Western blot were used to examine the expression of TSSC1 in glioma samples, including 80 normal paraneoplastic tissues and 80 primary tumors. MTT and transwell were used to analyze the effect of TSSC1 knockout on proliferation, migration, and invasion in U87 cells. Results TSSC1 is down-regulated in glioma compared to its paraneoplastic counterparts and negatively related to higher grade. Furthermore, knockdown of TSSC1 expression results in increased proliferation, migration and invasion in U87 cells in vitro. Conclusion Our results may worked as a marker for early diagnosis and prognosis of glioma.
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