靶向Wnt信号的溶瘤腺病毒抑制肝癌干细胞研究
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浙江理工大学生命科学学院,浙江理工大学生命科学学院,浙江理工大学生命科学学院,浙江理工大学生命科学学院,浙江理工大学生命科学学院,浙江理工大学生命科学学院

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国家自然科学基金(81272687),浙江省自然科学基金(LZ13H160004, LY16H160056)和浙江省大学生科技创新活动计划(2016R406007)资助项目


Inhibition of Hepatocellular Stem Cells by Oncolytic Virus Targeting Wnt Signaling Pathway
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College of Life Sciences,Zhejiang Sci-Tech University,Hang Zhou,310018 China,College of Life Sciences,Zhejiang Sci-Tech University,Hang Zhou,310018 China,College of Life Sciences,Zhejiang Sci-Tech University,Hang Zhou,310018 China,College of Life Sciences,Zhejiang Sci-Tech University,Hang Zhou,310018 China,College of Life Sciences,Zhejiang Sci-Tech University,Hang Zhou,310018 China,College of Life Sciences,Zhejiang Sci-Tech University,Hang Zhou,310018 China

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This work was supported by grants from The National Natural Science Foundation of China (81272687), Zhejiang Provincial Natural Science Foundation of China (LZ13H160004, LY16H160056) and College Students’ Science and Technology Innovation Activities in Zhejiang Province (2016R406007)

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    摘要:

    肝细胞癌(hepatocellular carcinoma,HCC)是全球第五大癌症并成为癌症死亡的主要原因,传统治疗早期肝癌取得了一定的进展,但是癌症的复发、转移和耐药仍未得到根本解决,这些现象可通过癌症干细胞理论(cancer stem cell,CSC)进行解释.本研究通过悬浮富集培养的方法,获得了MHCC-97H 细胞的三维立体球细胞(sphere cell),并检测其干细胞特性,通过删除5型腺病毒的E1A CR2区域24 bp碱基,并用Wnt活性转录元件TCF/TEF调控E1A基因表达,同时插入抗癌基因TSLC1,得到了双靶向溶瘤腺病毒Ad.wnt-E1A(Δ24 bp)-TSLC1,通过MTT、结晶紫染色实验、Hoechst、细胞划痕、蛋白质印迹技术、Transwell及免疫荧光技术检测重组病毒对肝癌类干细胞的EMT(epithelial-mesenchymal transition)转化、杀伤、凋亡以及迁移的作用.结果表明,悬浮富集培养的MHCC-97H sphere 细胞具有自我更新、分化能力、静息性以及耐药性,高表达肝癌干细胞表面标志物(如CD133等),重组病毒处理后表现出明显的杀伤效果及抑制细胞迁移与侵袭的特性,靶向抑制MHCC-97H sphere 细胞能力更强(P < 0.001),且重组病毒能有效诱导肝癌类干细胞通过caspase 途径发生凋亡.因此,重组病毒Ad.wnt-E1A(Δ24 bp)-TSLC1 有可能成为靶向肝癌干细胞的治疗药物,具有一定的临床应用前景.

    Abstract:

    Hepatocellular carcinoma (HCC) is the fifth largest cancer in the world and is the main cause of cancer death. Common treatment for early hepatocellular carcinoma has made some progress, but cancer recurrence, metastasis and drug resistance have not been fundamentally resolved, which can be explained by cancer stem cell theory (cancer stem cell, CSC). In this study, we obtained MHCC-97H sphere cells by suspension enrichment culture method and detected their stem cell characteristics. We deleted the 24 bp of the E1A CR2 region of the adenovirus type 5 and used the Wnt transcription element TCF/TEF to regulate E1A and then inserted the anti-oncogene TSLC1 into the vector to obtain the double targeting oncolytic adenovirus Ad.wnt-E1A(Δ24 bp)- TSLC1. The effect of recombinant adenovirus Ad.wnt-E1A(Δ24 bp)-TSLC1 on the killing effect, cell apoptosis and migration of hepatocarcinoma stem-like cells were detected by MTT, crystal violet, Hoechst staining, cell scratch, Western blot and immunofluorescence, respectively. The results show that MHCC-97H sphere cells have the capability of self-renewal and differentiation, and high expression of hepatocyte stem cell surface marker (such as CD133). After dealt with recombinant virus, it showed obvious killing effect and inhibition of cell migration and EMT (Epithelial-mesenchymal transition). Therefore, ability of targeting inhibition of 97H sphere cells was significantly higher than that of 97H cells (P<0.001). The recombinant virus could induce apoptosis of hepatocellular stem-like cells through caspase pathway. Therefore, the recombinant adenovirus Ad.wnt-E1A (Δ24 bp)- TSLC1 may be a promising therapeutic agent for targeting hepatoma stem cells, which has certain application value to clinical treatment.

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章健,来维洁,李强,金槿,肖伯端,郭婉,王毅刚.靶向Wnt信号的溶瘤腺病毒抑制肝癌干细胞研究[J].生物化学与生物物理进展,2017,44(4):326-337

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  • 收稿日期:2016-12-10
  • 最后修改日期:2017-02-21
  • 接受日期:2017-03-17
  • 在线发布日期: 2017-04-24
  • 出版日期: 2017-04-20