中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (5): 687-692.doi: 10.3969/j.issn.2095-4344.2017.05.006

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

骨髓间充质干细胞对经转化生长因子β1、骨桥蛋白基因沉默肝癌细胞MHCC97-H的影响

李天然1,黄晓斌2,黄楚恒2,卢光明3,李延军3   

  1. 1解放军总医院第一附属医院放射科,北京市  100048
    2解放军第九五医院放射科,福建省莆田市  351100
    3解放军南京总医院医学影像科,江苏省南京市  210000
  • 出版日期:2017-02-18 发布日期:2017-03-20
  • 通讯作者: 卢光明,主任医师,教授,博士生导师,解放军南京总医院医学影像科,江苏省南京市 210000
  • 作者简介:李天然,男,1970 年生,黑龙江省富锦市人,汉族,2012 年北京大学医学部毕业,博士后,副主任医师,主要从事肝癌分子影像学研究。
  • 基金资助:

    国家自然科学基金资助项目(81271607);南京军区医药卫生重点资助项目(11Z035);中国博士后基金(2015M572810)

Effect of bone marrow mesenchymal stem cells on MHCC97-H cells after transforming growth factor beta1 and osteopontin gene interference

Li Tian-ran1, Huang Xiao-bin2, Huang Chu-heng2, Lu Guang-ming3, Li Yan-jun3   

  1. 1Radiology Department of the First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
    2Radiology Department of Chinese PLA 95th Hospital, Putian 351100, Fujian Province, China
    3Radiology Department of Chinese PLA Nanjing General Hospital, Nanjing 210000, Jiangsu Province, China
  • Online:2017-02-18 Published:2017-03-20
  • Contact: Lu Guang-ming, Chief physician, Professor, Doctoral supervisor, Radiology Department of Chinese PLA Nanjing General Hospital, Nanjing 210000, Jiangsu Province, China
  • About author:Li Tian-ran, M.D., Associate chief physician, Radiology Department of the First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81271607; the Key Medicine and Health Funding Project of the Nanjing Military Region of Chinese PLA, No. 11Z035; China Postdoctoral Science Foundation, No. 2015M572810

摘要:

文章快速阅读:

文题释义:
基因沉默技术:
双链RNA被特异的核酸酶降解,产生小干扰RNA,这些小干扰RNA与同源的靶RNA互补结合,特异性酶降解靶RNA,从而抑制、下调基因表达。
骨桥蛋白:为一种分泌型磷酸化糖蛋白,其分子结构中含有RGD多肽序列,骨桥蛋白主要通过与其受体整合素相互作用,参与肿瘤转移的多个过程。

 

摘要
背景:
骨髓间充质干细胞对肝癌增殖能力和转移能力的影响是研究的热点,可通过基因工程技术对肝癌细胞进行改造,使其降低生物活性因子的表达,从而寻找合适的干预靶点,提高骨髓间充质干细胞的干预效能。
目的:经转化生长因子β1、骨桥蛋白基因沉默的高转移潜能肝癌细胞(MHCC97-H)与骨髓间充质干细胞共培养,观察MHCC97-H细胞侵袭能力的变化,并通过动物模型荧光成像观察骨髓间充质干细胞对MHCC97-H肝癌组织动物模型的干预作用。
方法:①将MHCC97-H细胞细胞分为4组,MHCC97-H设为空白对照组,MHCC97-H基因沉默转染阴性对照为阴性对照组,MHCC97-H-转化生长因子β1为转化生长因子β1基因沉默组,MHCC97-H-骨桥蛋白为骨桥蛋白基因沉默组;②Transwells法进行各组细胞与骨髓间充质干细胞共培养实验,48 h后结晶紫染色,随机取3个视野,计数;③结合有红色荧光蛋白基因的各组MHCC97-H细胞株,分别自裸鼠右侧腋下接种复制皮下移植瘤模型。肿瘤体积到50 mm3开始瘤内注射骨髓间充质干细胞,4周后进行荧光强度分析;肝癌组织冰冻切片二脒基苯基吲哚细胞核染色后行荧光显微镜观察。
结果与结论:①细胞计数结果表明,骨髓间充质干细胞使经基因沉默后的MHCC97-H细胞迁移数量明显减少;结晶紫染色病理图片显示,经基因修饰的MHCC97-H细胞迁移能力明显降低;②体内荧光成像结果显示,骨桥蛋白基因沉默组肿瘤体积明显缩小,荧光亮度低于其他组别,定量结果显示骨桥蛋白基因沉默组吸光度值明显降低,表明骨髓间充质干细胞对经骨桥蛋白干扰的MHCC97-H高转移潜能肝癌动物模型干预效能最佳;③病理切片荧光观察结果显示,骨髓间充质干细胞主要分布在肿瘤坏死区附近,骨桥蛋白基因沉默组荧光表达较转化生长因子β1基因沉默组和空白对照组多,表明MHCC97-H细胞经骨桥蛋白基因沉默后骨髓间充质干细胞在肿瘤中的分布增多;④结果提示,通过抑制骨桥蛋白和转化生长因子β1两种因子的表达可以降低肝癌细胞侵袭能力,经骨桥蛋白沉默可能更有利于基于骨髓间充质干细胞的生物治疗。

 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID:
0000-0001-7033-2092(李天然)

关键词: 干细胞, 骨髓干细胞, 肿瘤, 骨髓间充质干细胞, 转化生长因子β1, 骨桥蛋白, MHCC97-H细胞, 动物模型, 国家自然科学基金

Abstract:

BACKGROUND: Bone marrow mesenchymal stem cells (BMSCs) are the focus of research on the proliferation and metastasis of hepatocellular carcinoma cells. By genetic engineering techniques, the hepatocellular carcinoma cells can be induced to reduce the expression of bioactive factors, thereby seeking suitable intervention targets for improving the interventional effect of BMSCs.
OBJECTIVE: To silence the expression of transforming growth factor beta1 (TGFβ1) and osteopontin (OPN) in high metastatic potential hepatocellular carcinoma cells (MHCC97-H) followed by co-culture with BMSCs and then to observe the change of MHCC97-H cell invasion ability as well as the interventional effect of BMSCs on the animal model of hepatocellular carcinoma tissue MHCC97-H by fluorescence imaging in vivo.
METHODS: MHCC97-H cells were divided into four groups: MHCC97-H group was set as a blank control group, and MHCC97-H NC siRNA as negative control group, and MHCC97-H siRNA TGFβ1 and siRNA OPN were experimental groups. Transwells assay was carried out for co-culture experiments. After 48 hours of co-culture, crystal violet staining was performed for cell counting in three randomly selected fields of vision. Combined with the red fluorescence protein gene, MHCC97-H cell lines in each group were inoculated via the right subaxillary subcutaneous transplantation to make a tumor model in nude mice. When the tumor volume was up to about 50 mm3, BMSCs were injected into the tumor in the nude mice, and 4 weeks later, fluorescence images were analyzed using software for fluorescence intensity. Frozen hepatocellular carcinoma tissue sections were taken for 4’,6-diamidino-2-phenylindole staining and fluorescence microscope observation.
RESULTS AND CONCLUSION: Cell counting results showed that BMSCs significantly decreased MHCC97-H cells after gene silencing, and crystal violet staining showed that the migration ability of MHCC97-H cells was significantly decreased. Tumor volume shown by the fluorescence imaging was significantly reduced after the OPN gene transfection, the fluorescence intensity was lower than that in the other groups, and quantitative results showed that the absorbance value of OPN shRNA cells decreased significantly compared with other groups, indicating the BMSCs exhibit best interventional effectiveness in OPN-silenced MHCC97-H cells. Pathological sections showed that BMSCs were mainly distributed in the tumor necrosis area, and the fluorescence expression in the OPN siRNA group was more than that in the TGFβ1 siRNA group and the blank control group, indicating that after OPN gene silencing of MHCC97-H cells, the distribution of BMSCs in the tumor was increased. To conclude, it is able to reduce the invasive ability of hepatocellular carcinoma cells by inhibiting the expression of OPN and TGF β1 factors, and OPN silencing may be more conductive to BMSCs biotherapy.

 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Stem Cells, Mesenchymal Stem Cells, Bone Marrow, Liver Neoplasms, Models, Animal

中图分类号: