中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (9): 1376-1381.doi: 10.3969/j.issn.2095-4344.0467

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

过表达白血病抑制因子受体对甲状腺癌干细胞干性维持及体内肺转移能力的影响

张振华1,苏自杰1,阚云珍2,刘秋雨2   

  1. 河南省人民医院,1甲状腺外科,2病理科,河南省郑州市 450003
  • 修回日期:2017-10-16 出版日期:2018-03-28 发布日期:2018-04-03
  • 通讯作者: 苏自杰,硕士,主任医师,河南省人民医院甲状腺外科,河南省郑州市 450003
  • 作者简介:张振华,男,1974年生,汉族,2010年中南大学湘雅医学院毕业,硕士,主治医师,主要从事甲状腺疾病方面的研究。
  • 基金资助:

    2013年河南省重点科技攻关计划项目(132102310095)

Effects of leukemia inhibitory factor receptor overexpression on stemness maintenance and lung metastasis in vivo of thyroid cancer stem cells

Zhang Zhen-hua1, Su Zi-jie1, Kan Yun-zhen2, Liu Qiu-yu2   

  1. 1Department of Thyroid Surgery, 2Department of Pathology, Henan Province People's Hospital, Zhengzhou 450003, Henan Province, China
  • Revised:2017-10-16 Online:2018-03-28 Published:2018-04-03
  • Contact: Su Zi-jie, Master, Chief physician, Department of Thyroid Surgery, Henan Province People's Hospital, Zhengzhou 450003, Henan Province, China
  • About author:Zhang Zhen-hua, Master, Attending physician, Department of Thyroid Surgery, Henan Province People's Hospital, Zhengzhou 450003, Henan Province, China
  • Supported by:

     the Major Science and Technology Research Project of Henan Province in 2013, No. 132102310095

摘要:

文章快速阅读:

文题释义:
白血病抑制因子受体(leukemia inhibitory factor receptor,LIFR):
是极其重要的肿瘤转移抑制因子,其在多种肿瘤中表达失调,如LIFR在甲状腺癌和乳腺癌中表达缺失,且LIFR的缺失与乳腺癌的淋巴结阳性状态、肿瘤分级增加、远处转移风险的增加及总体生存率的降低密切相关。通过过表达LIFR可抑制多种恶性肿瘤的复发与转移。
上皮间质转化:研究显示肿瘤发生复发转移的过程中,存在上皮间质转化,即存在上皮细胞向间质细胞转化的过程,上皮间质转化使肿瘤细胞具有更强的侵袭和转移能力,该过程使肿瘤细胞拥有干细胞特征,减少细胞的凋亡和衰老,并促进肿瘤细胞的免疫抑制。在肿瘤发生发展的初期,上皮细胞经过上皮间质转化过程转化为原位癌,后续肿瘤细胞经上皮间质转化过程向周围组织扩散,并经血管或淋巴管向远处组织发生迁移,最终形成转移灶。

 

摘要
背景:
甲状腺癌干细胞是甲状腺癌发生复发转移的关键,白血病抑制因子受体(leukemia inhibitory factor receptor,LIFR)在多种恶性肿瘤中表达下调,且过表达LIFR可抑制恶性肿瘤的复发与转移。
目的:探讨LIFR对甲状腺癌干细胞干性维持和体内肺转移能力的影响。  
方法:收集转移性甲状腺癌患者的肺转移灶,分离培养原代甲状腺癌细胞TCLM,经无血清悬浮培养形成肿瘤细胞球,流式分选筛选出CD133+表型的转移性甲状腺癌干细胞细胞亚群TCLM-S。将包含LIFR的重组慢病毒过表达质粒及其阴性对照空载体质粒分别以病毒/细胞数量=20的比例感染甲状腺癌干细胞TCLM-S,经2.0 mg/L嘌呤霉素筛选,成功构建稳定表达LIFR或阴性对照的TCLM-SLIFR和TCLM-Scontrol细胞株。qRT-PCR检测LIFR在TCLM-SLIFR和TCLM-Scontrol细胞中的表达,流式细胞术检测TCLM-SLIFR和TCLM-Scontrol细胞中CD133+细胞亚群的比例,Western Blot检测TCLM-SLIFR和TCLM-Scontrol细胞中干性相关因子SOX2、Oct4、Nanog及肿瘤侵袭和转移相关蛋白E-cad、MMP-2、MMP-7的表达。将TCLM-SLIFR和TCLM-Scontrol细胞分别经尾静脉注射到BALB/c裸鼠体内,构建甲状腺癌干细胞裸鼠肺转移模型,观察过表达LIFR对裸鼠体内肺转移能力的影响。 
结果与结论:与TCLM-Scontrol细胞相比,TCLM-SLIFR细胞中LIFR的表达显著增加,流式分选技术检测CD133+干细胞亚群的比例显著降低,干细胞干性相关因子SOX2、Oct4和Nanog的蛋白表达显著降低,肿瘤侵袭和转移相关蛋白E-cad的表达显著增加,MMP-2和MMP-7的表达显著降低,裸鼠体内肺转移的数量显著降低。结果表明,过表达LIFR可显著抑制甲状腺癌干细胞的干性和体内肺转移能力。

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: 0000-0003-2036-7267(张振华)

关键词: 干细胞, 肿瘤干细胞, 甲状腺癌, LIFR, CD133+, 肺转移

Abstract:

BACKGROUND: Thyroid cancer stem cells are essential to the recurrence and metastasis of thyroid carcinoma. Leukemia inhibitory factor receptor (LIFR) shows a downward trend in a variety of malignant tumors, and its overexpression can inhibit the recurrence and metastasis of malignant tumors.
OBJECTIVE: To explore the effect of LIFR on the stemness maintenance and lung metastasis of thyroid cancer stem cells in vivo. 
METHODS: Primary thyroid cancer cells TCLM were isolated from the lung metastases of a metastatic thyroid cancer patient. Serum-free suspension culture was used to form tumor cell balls. Flow cytometry was used to screen CD133+ phenotype of metastatic thyroid cancer stem cell subpopulation TCLM-S. The overexpressed recombinant lentiviral plasmid containing LIFR and its negative control containing the empty plasmid were infected into thyroid cancer stem cells TCLM-S at the ratio of virus/cell number=20, and screened with 2.0 mg/L puromycin to construct TCLM-SLIFR and TCLM-Scontrol stem cells which stably expressed LIFR and its control. Real-time quantitative PCR (qRT-PCR) was used to detect the expression of LIFR in TCLM-SLIFR and TCLM-Scontrol stem cells. Flow cytometry was used to detect the percentage of CD133+ phenotype cell subsets, western blot assay was used to detect the expression of tumor stemness related factors SOX2, Oct4, Nanog and tumor invasion and metastasis related proteins E-cadherin, matrix metalloproteinase (MMP)-2, MMP-7 in TCLM-SLIFR and TCLM-Scontrol stem cells. TCLM-SLIFR and TCLM-Scontrol stem cells were respectively injected into BALB/c nude mice by tail vein, and the lung metastasis model of thyroid cancer stem cells was constructed. The effect of LIFR overexpression on lung metastasis was observed.
RESULTS AND CONCLUSION: Compared with TCLM-Scontrol cells, the expression of LIFR in TCLM-SLIFR cells was significantly increased, the proportion of CD133+ phenotype stem cell subsets was significantly decreased, the expression of SOX2, Oct4 and Nanog were significantly decreased, the expression of E-cadherin was significantly increased, and the expression of MMP-2 and MMP-7 was significantly decreased. Moreover, the number of lung metastasis in nude mice given TCLM-SLIFR cells was significantly decreased as compared with those given TCLM-Scontrol cells. To conclude, LIFR overexpression can decrease the stemness and ability of lung metastasis in vivo.

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: Neoplastic Stem Cells, Thyroid Neoplasms, Leukemia Inhibitory Factor, Neoplasm Metastasis, Tissue Engineering

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