中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (50): 8062-8066.doi: 10.3969/j.issn.2095-4344.2015.50.005

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

乳腺癌干细胞分离及耐药蛋白分析

郭 锰,万里新   

  1. 南阳市中心医院,河南省南阳市 473009
  • 收稿日期:2015-10-14 出版日期:2015-12-03 发布日期:2015-12-03
  • 作者简介:郭锰,男,1981年生,河南省南阳市人,汉族,2006年新乡医学院毕业,硕士,副主任医师,主要从事肿瘤内科临床。

Breast cancer stem cells: separation and resistance protein analysis

Guo Meng, Wan Li-xin   

  1. Nanyang City Center Hospital, Nanyang 473009, Henan Province, China
  • Received:2015-10-14 Online:2015-12-03 Published:2015-12-03
  • About author:Guo Meng, Master, Associate chief physician, Nanyang City Center Hospital, Nanyang 473009, Henan Province, China

摘要:

背景:乳腺癌干细胞是人体内相对比较特殊的细胞,该细胞具有自我更新以及多向分化能力,能够促进肿瘤的形成和发展,并且长期维持肿瘤生长。因此,分析并研究乳腺癌干细胞耐药蛋白的表达具有重要的意义。
目的:从人乳腺癌原代组织中分离乳腺癌干细胞,观察其分化及形态学特点,分析乳腺癌干细胞相关耐药蛋白的表达及意义。
方法:选取30例乳腺浸润性导管癌肿瘤组织标本,采用机械分离方法制作成不同的单细胞悬液,用免疫磁珠两步法分离出乳腺癌干细胞和乳腺癌分化细胞,采用免疫细胞化学二步法检测细胞耐药性蛋白的表达。
结果与结论:乳腺癌干细胞比例与患者的年龄、肿瘤的长径、淋巴结转移及组织学分级等差异不显著(P > 0.05);乳腺癌干细胞P-gp、GST-π阳性表达率显著高于乳腺癌分化细胞(P < 0.05);乳腺癌干细胞TopoⅡ、LRP阳性表达率显著低于乳腺癌分化细胞(P < 0.05),与乳腺癌分化细胞相比,乳腺癌干细胞可通过高表达P-gp,GST-π,低表达TopoⅡ,LRP而具有更强的耐药性,可能是乳腺癌化疗耐药的关键原因。 

 

关键词: 干细胞, 肿瘤干细胞, 乳腺癌干细胞, 分离方法, 形态学, 耐药蛋白

Abstract:

BACKGROUND: Breast cancer stem cells are relatively special cells in the body, which have the self-renewal and multi-differentiation ability to promote tumor formation and development, and maintain tumor growth for a long-term. Therefore, it is of great significance to analyze the expression of resistance proteins of breast cancer stem cells.
OBJECTIVE: To isolate breast cancer stem cells from human breast cancer tissues, to observe their differentiation and morphology characteristics and to analyze their resistance proteins.
METHODS: Thirty tumor samples of breast invasive ductal carcinoma were selected to separate single cell suspension using mechanical separation method, and breast cancer stem cells and differentiated cells were sorted with two-step immunomagnetic bead method. Two-step immunocytochemistry method was used to detect the expression of resistance proteins in breast cancer stem cells.
RESULTS AND CONCLUSION: Percentage of breast cancer stem cells had no significant correlations with age, long diameter of the tumor, lymph node metastasis and histological grading (P > 0.05). P-gp and GST-π positive rates in the breast cancer stem cells were significantly higher than those in the differentiated cells (P < 0.05); while TopoII and LRP positive rates in the breast cancer stem cells were significantly lower than those in the differentiated cells (P < 0.05). To conclude, breast cancer stem cells show stronger drug resistance than the differentiated cells by highly expressing P-gp and GST-π and lowly expressing TopoII and LRP, which may be the key reason for chemotherapy resistance in breast cancer. 

 

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