中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (17): 2703-2708.doi: 10.3969/j.issn.2095-4344.1718

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

鼻咽癌CNE2干样细胞具有干细胞特性及较高水平的自噬表达

代森林1,李晓倩2,吴 杰2,岳昌武2,李亚军2   

  1. 1遵义医学院,贵州省遵义市 563000;2遵义医学院第三附属医院,贵州省遵义市 563000
  • 修回日期:2019-01-28 出版日期:2019-06-18 发布日期:2019-06-18
  • 通讯作者: 李亚军,博士,硕士生导师,遵义医学院第三附属医院,贵州省遵义市 563000; 并列通讯作者:岳昌武,博士,硕士生导师,遵义医学院第三附属医院,贵州省遵义市 563000
  • 作者简介:代森林,男,1990年生,河南省平舆县人,汉族,遵义医学院转化医学在读硕士,主要从事重大疾病分子诊断与新药研制方面的研究。
  • 基金资助:

    国家自然科学基金项目(81560444),项目负责人:李亚军;贵州省科技厅基金项目(黔科合SY[2015]3046号),项目负责人:李亚军;联合科技(遵市科合社字[2017]47号),项目负责人:李亚军

CNE2 stem-like cells of nasopharyngeal carcinoma have stem cell characteristics and high level of autophagy

Dai Senlin1, Li Xiaoqian2, Wu Jie2, Yue Changwu2, Li Yajun2   

  1. 1Zunyi Medical College, Zunyi 563000, Guizhou Province, China; 2the Third Affiliated Hospital of Zunyi Medical College, Zunyi 563000, Guizhou Province, China
  • Revised:2019-01-28 Online:2019-06-18 Published:2019-06-18
  • Contact: Li Yajun, MD, Master’s supervisor, the Third Affiliated Hospital of Zunyi Medical College, Zunyi 563000, Guizhou Province, China; Yue Changwu, MD, Master’s supervisor, the Third Affiliated Hospital of Zunyi Medical College, Zunyi 563000, Guizhou Province, China
  • About author:Dai Senlin, Master candidate, Zunyi Medical College, Zunyi 563000, Guizhou Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81560444 (to LYJ); the Foundation of Guizhou Provincial Science and Technology Department, No. SY[2015]3046 (to LYJ); the United Technology Project, No. [2017]47 (to LYJ)

摘要:

文章快速阅读:

文题释义:
鼻咽癌干样细胞:
鼻咽癌组织中存在具有干细胞生物学特性的一小部分细胞,它们参与肿瘤形成过程的始终,与鼻咽癌的发生、发展、复发、转移及放化疗抵抗密切相关,和患者的预后息息相关。
细胞自噬:又称细胞自我消化,是真核生物中进化保守的对细胞内物质进行周转的重要过程。该过程中一些损坏的蛋白或细胞器被双层膜结构的自噬小泡包裹后,送入溶酶体(动物)或液泡(酵母和植物)中进行降解并得以循环利用。

 

摘要
背景:
鼻咽癌是具有高侵袭转移潜能的头颈部恶性肿瘤,对鼻咽癌晚期患者尚未取得满意治疗效果。目前,已有一些自噬抑制剂与抗肿瘤药物同时应用于临床研究,但可能机制尚未明确。
目的:探索鼻咽癌干样细胞是否存在较高水平自噬表达。
方法:通过无血清悬浮培养法从人源化鼻咽癌CNE2细胞株中富集得到肿瘤干样细胞球。通过细胞分化实验、流式细胞术、透射电镜、Western blot及RT-PCR检测鼻咽癌CNE2亲本细胞和CNE2干样细胞的干细胞特性及细胞自噬水平。
结果与结论:①通过无血清悬浮培养法能富集得到鼻咽癌CNE2干样细胞,在含血清培养基中培养能贴壁分化成鼻咽癌CNE2亲本细胞;②鼻咽癌CNE2干样细胞CD133阳性标记的细胞比例(9.6%)高于鼻咽癌CNE2亲本细胞(0.3%),差异有显著性意义(P < 0.01);③与鼻咽癌CNE2亲本细胞相比,鼻咽癌CNE2干样细胞高表达干性相关基因(Bmi-1、Twist1)和自噬相关基因(Beclin1、LC3B),差异有显著性意义(P < 0.01);④透射电镜观察鼻咽癌CNE2干样细胞自噬小体较鼻咽癌CNE2亲本细胞形成明显增多;⑤结果表明,通过无血清悬浮培养法可有效富集鼻咽癌CNE2干样细胞,鼻咽癌干样细胞具有干细胞生物学特性,并存在较高水平自噬表达。


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:
0000-0003-2284-221X(代森林)

关键词: 鼻咽癌, 肿瘤干细胞, 无血清悬浮培养法, 鼻咽癌干样细胞, 细胞自噬, 国家自然科学基金

Abstract:

BACKGROUND: Nasopharyngeal carcinoma is a head and neck malignant tumor with high invasion and metastatic potential. It has not yet achieved satisfactory effects in the treatment of advanced nasopharyngeal carcinoma. Some autophagy inhibitors and anti-tumor drugs have been used in clinical research, but the possible mechanism has not been clarified.
OBJECTIVE: To explore whether high-level autophagy occurs in stem-like cells of nasopharyngeal carcinoma.
METHODS: Tumor stem-like cell spheres were enriched from humanized nasopharyngeal carcinoma CNE2 cell line by serum-free suspension culture. The stem cell characteristics and expression levels of autophagy-related genes and proteins in CNE2 parental cells and CNE2 stem-like cells were detected using cell differentiation assay, flow cytometry, transmission electron microscope, western blot and RT-PCR. 
RESULTS AND CONCLUSION: The nasopharyngeal carcinoma CNE2 stem-like cells were enriched by serum-free suspension culture. The suspension spheres were cultured in serum-containing medium to differentiate into CNE2 parental cells. Proportion of CD133+ cells in CNE2 stem-like cells (9.6%) was significantly higher than that in CNE2 parental cells (0.3%; P < 0.01). Compared with CNE2 parental cells, CNE2 stem-like cells highly expressed stemness-related genes Bmi-1, Twist1 and autophagy-related genes Beclin1 and LC3B (P < 0.01). Under the transmission electron microscope, the autophagic bodies of CNE2 stem-like cells in nasopharyngeal carcinoma were significantly increased compared with CNE2 parental cells. Therefore, nasopharyngeal carcinoma CNE2 stem-like cells can be effectively enriched using the serum-free suspension culture method, and be verified to have the biological characteristics of stem cells and exhibit high-level autophagy.

Key words: nasopharyngeal carcinoma, tumor stem cells, serum-free suspension culture, nasopharyngeal carcinoma stem-like cells, autophagy, National Natural Science Foundation of China

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