中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (21): 3316-3321.doi: 10.3969/j.issn.2095-4344.0897

• 肿瘤干细胞 cancer stem cells • 上一篇    下一篇

miR-15家族促进CD133+胰腺癌干样细胞的迁移和侵袭

蔡尚党1,蔡满地2,娄 宁3,郭艳萍4,殷 涛5   

  1. 1河南省中医院肛肠科,河南省郑州市 450002;2河南大学医学院临床医学系,河南省开封市 475000;3中山大学附属肿瘤医院ICU,广东省广州市 510000;4河南省人民医院病理科,河南省郑州市 450008;5华中科技大学同济医学院附属协和医院胰腺病研究所,湖北省武汉市 430022
  • 修回日期:2018-02-24 出版日期:2018-07-28 发布日期:2018-07-28
  • 作者简介:蔡尚党,男,1969年生,河南省兰考县人,汉族,2016年郑州大学医学院毕业,硕士,副主任医师,主要从事肛肠外科方面的研究。
  • 基金资助:

    国家自然科学基金(81372665)

miR-15 family promotes the migration and invasion of CD133+ pancreatic cancer stem-like cells

Cai Shang-dang1, Cai Man-di2, Lou Ning3, Guo Yan-ping4, Yin Tao5   

  1. 1Department of Anorectal, Henan Traditional Chinese Medicine Hospital, Zhengzhou 450002, Henan Province, China; 2Department of Clinical Medicine, Medical College of Henan University, Kaifeng 475000, Henan Province, China; 3ICU, Sun Yat-sen University Cancer Center, Guangzhou 510000, Guangdong Province, China; 4Department of Pathology, Henan Provincial People’s Hospital, Zhengzhou 450008, Henan Province, China; 5Pancreatic Disease Research Institute, Wuhan Union Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, China
  • Revised:2018-02-24 Online:2018-07-28 Published:2018-07-28
  • About author:Cai Shang-dang, Master, Associate chief physician, Department of Anorectal, Henan Traditional Chinese Medicine Hospital, Zhengzhou 450002, Henan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81372665

摘要:

文章快速阅读:

文题释义:
CD133:
是一个分子质量为120 ku的五次跨膜糖蛋白,最初发现其在造血干细胞及祖细胞上表达。一些研究表明,CD133是包括胰腺癌在内的多种肿瘤细胞的干细胞标记,与癌症的预后不良有关。
肿瘤干细胞的分离培养方法:主要有2种,一种是利用流式细胞仪或免疫磁珠对细胞表面表达的特定抗原分子等阳性细胞进行富集,得到含量较高的肿瘤干细胞;另一种方法是使用无血清培养基培养,通过非干细胞凋亡而干细胞成球的特性筛选出肿瘤干细胞。

 

摘要
背景:
一些研究表明,CD133是包括胰腺癌在内的多种肿瘤细胞的干细胞标记,与癌症的预后不良有关。miR-15家族参与凋亡、细胞分化与周期调控、应激等重要细胞功能活动的调节,具有潜在的干预价值。  
目的:探讨miR-15家族对CD133+胰腺癌干样细胞迁移和侵袭的影响。
方法:首先构建高迁移性胰腺癌细胞亚系CD133+Capan-1M9,经鉴定具有干样细胞特征,在此基础上通过慢病毒转导的方式构建过表达miR-15a、miR-15b和miR-15c的CD133+Capan-1M9细胞系,同时将稳定转染NC-miRNA的细胞系作为阴性对照组。qRT-PCR检测过表达细胞系中miR-15a、miR-15b和miR-15c表达情况及上皮-间充质转化相关蛋白纤维连接蛋白、波形蛋白和N-神经钙黏素mRNA表达;MTT法检测过表达细胞系增殖能力和吉西他滨抗性;球体形成实验检测过表达细胞系自我更新能力;细胞迁移和侵袭实验检测过表达细胞系的迁移和侵袭能力;Western blot检测过表达细胞系中上皮-间充质转化相关蛋白纤维连接蛋白、波形蛋白和N-神经钙黏素表达。
结果与结论:①与阴性对照组相比,过表达CD133+Capan-1M9细胞系中miR-15a、miR-15b和miR-15c表达量分别升高了8.3,10,9.5倍,而纤维连接蛋白、波形蛋白和N-神经钙黏素mRNA和蛋白表达也显著升高(P < 0.05);②过表达CD133+Capan-1M9细胞系增殖能力与阴性对照组相比差异无显著性意义(P > 0.05),而对吉西他滨的抗性显著增强(P < 0.05);③与阴性对照组相比,过表达CD133+Capan-1M9细胞系的球体数量和体积没有显著变化(P > 0.05);④与阴性对照组相比,过表达CD133+Capan-1M9细胞系的细胞迁移和侵袭能力显著增强(P < 0.05);⑤miR-15家族能够调控上皮-间质转化进而促进CD133+胰腺癌干样细胞的迁移与侵袭。

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:
0000-0002-8276-8624(蔡尚党)

关键词: 胰腺癌, miR-15, 肿瘤干细胞, CD133, 细胞迁移, 细胞侵袭, 干细胞, 国家自然科学基金

Abstract:

BACKGROUND: Some studies have shown that CD133 is a stem cell marker for a variety of tumor cells, such as pancreatic cancer, which is associated with a poor prognosis in cancer patients. miR-15 family is involved in cell apoptosis, differentiation, cycle regulation and stress, and has potential value as an intervention.
OBJECTIVE: To investigate the effects of miR-15 family on the migration and invasion of CD133+ pancreatic cancer stem-like cells.
METHODS: First, a highly migrating pancreatic cancer cell line, Capan-1M9, was constructed, and then CD133+Capan-1M9 cell lines that overexpressed miR-15a, miR-15b and miR-15c were constructed by lentivirus transduction. NC-miRNA cell lines were taken as negative controls. Expression of miR-15a, miR-15b and miR-15c in the recombinant cell lines and epithelial-mesenchymal transition (EMT)-related proteins, fibronectin, vimentin and N-cadherin mRNA were determined by qRT-PCR. MTT assay was used to detect the proliferation and gemcitabine resistance of recombinant cell lines. Spheroid formation test was used to detect the self-renewal ability of recombinant cell lines. Migration and invasion ability of the recombinant cell lines were detected by cell migration and invasion assay. EMT-related proteins fibronectin, vimentin and N-cadherin were detected by western blot.
RESULTS AND CONCLUSION: qPCR results showed that the expression of miR-15a, miR-15b and miR-15c in the CD133+ Capan-1M9 cell lines increased by 8.3, 10 and 9.5 times compared with the negative control group, and the expression of fibronectin, vimentin and N-cadherin mRNA was also significantly increased (P < 0.05). There was no significant difference in cell proliferation between the recombinant cell lines and the negative control group (P > 0.05), but the gemcitabine resistance was significantly increased in the recombinant cell lines as detected by the MTT (P < 0.05). The number and volume of spheres in the recombinant cell lines did not change significantly compared with the negative control group (P > 0.05). The cell migration and invasion abilities of the recombinant cell line were significantly enhanced compared with the negative control group (P < 0.05). Our experimental findings suggest that the miR-15 family can promote migration and invasion of CD133+ pancreatic cancer stem-like cells via EMT regulation.

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: Pancreatic Neoplasms, MicroRNAs, Neoplastic Stem Cells, Cell Movement, Tissue Engineering

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