中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (3): 458-463.doi: 10.3969/j.issn.2095-4344.0578

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

重组人骨形态发生蛋白2对乳腺癌MCF-7细胞增殖的影响

刘书中1,劳立峰2   

  1. ( 1中国医学科学院,北京协和医学院,北京协和医院骨科,北京市  100730;2上海交通大学医学院附属仁济医院骨科,上海市  200127)
  • 收稿日期:2018-07-08 出版日期:2019-01-28 发布日期:2021-04-28
  • 通讯作者: 劳立峰,博士,主治医师,上海交通大学医学院附属仁济医院,上海市 200127
  • 作者简介:刘书中,男,1989年生,吉林省长春市人,满族,2015年上海交通大学毕业,博士,医师,主要从事骨与关节疾病诊断与治疗研究。
  • 基金资助:

    上海市科委医学引导类科技支撑项目(17411964200),项目负责人:劳立峰;上海市浦江人才计划(15PJD026),项目负责人:劳立峰;上海交通大学医工交叉研究基金面上项目(YG2014MS51),项目负责人:劳立峰;上海仁济医院临床科研创新培育基金(PYXJS16-006),项目负责人:劳立峰

Effects of recombinant human bone morphogenetic protein-2 on the proliferation of breast cancer MCF-7 cells

Liu Shuzhong1, Lao Lifeng2   

  1.  (1Chinese Academy of Medical Sciences & Peking Union Medical College, Department of Orthopedics, Peking Union Medical College Hospital, Beijing 100730, China; 2Department of Orthopedics, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China)
  • Received:2018-07-08 Online:2019-01-28 Published:2021-04-28
  • Contact: Lao Lifeng, MD, Attending physician, Department of Orthopedics, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
  • About author:Liu Shuzhong, MD, Physician, Chinese Academy of Medical Sciences & Peking Union Medical College, Department of Orthopedics, Peking Union Medical College Hospital, Beijing 100730, China
  • Supported by:

    the Medicine-Guided Science and Technology Project of Shanghai Science and Technology Commission, No. 17411964200 (to LLF); the Talent Program of Shanghai Pujiang, No. 15PJD026 (to LLF); the Medical-Engineering Joint Foundation of Shanghai Jiao Tong University, No. YG2014MS51 (to LLF); the Clinical Research and Innovation Foundation of Renji Hospital of Shanghai, No. PYXJS16-006 (to LLF)

摘要:

文章快速阅读:

文题释义:
重组人骨形态发生蛋白2:是诱导成骨的关键物质之一,属转化生长因子β超家族中的一员,它参与调节多种细胞的增殖、分化、迁移、侵袭及凋亡等一系列的生物学过程。
Akt:是PI3K/Akt信号通路中的关键分子,又称PKB,即蛋白激酶B,是一种丝氨酸/苏氨酸蛋白激酶,可使多种蛋白及自身磷酸化,在调节细胞存活及多种生物学功能中起着极其重要的作用。Akt活性异常可导致正常细胞向恶性细胞转化,其磷酸化功能能够使多种底物被活化,促进肿瘤细胞的生长、增殖、侵袭及转移,抑制肿瘤细胞的凋亡。
细胞增殖:是生物体的重要生命特征,细胞以分裂的方式进行增殖。细胞增殖过程中通过细胞分裂,可以将复制的遗传物质平均地分配到2个子细胞中去。由此可见,细胞增殖是生物体生长、发育、繁殖和遗传的基础。
摘要
背景:
有研究发现重组人骨形态发生蛋白2的临床应用可增加恶性肿瘤的患病风险,但关于重组人骨形态发生蛋白2对乳腺癌MCF-7细胞增殖作用的影响及机制尚未被阐明。
目的:探讨在体外及体内条件下重组人骨形态发生蛋白2对乳腺癌MCF-7细胞增殖能力的影响及其作用机制。
方法:①体外实验:无血清条件下,不同浓度的重组人骨形态发生蛋白2处理MCF-7细胞,通过MTT检测重组人骨形态发生蛋白2对细胞增殖能力的影响。利用流式细胞分析技术检测细胞周期,通过Real-time PCR检测不同浓度的重组人骨形态发生蛋白2对p21、cyclin E表达的影响,应用Western blot技术检测不同浓度的重组人骨形态发生蛋白2处理对p21、cyclin E蛋白水平及对PI3K/Akt磷酸化水平的影响;②体内实验:将14只雌性裸鼠随机等分为实验组和对照组,实验组成瘤方案为MCF-7细胞+重组人骨形态发生蛋白2,对照组成瘤方案为等量MCF-7细胞,分别于6周龄裸鼠皮下注射。
结果与结论:①体外实验:无血清条件下,不同浓度的重组人骨形态发生蛋白2处理细胞,发现重组人骨形态发生蛋白2可显著抑制乳腺癌细胞系MCF-7的增殖能力。无血清条件下,不同浓度的重组人骨形态发生蛋白2处理细胞24 h,发现重组人骨形态发生蛋白2可增加G1期细胞所占比率。重组人骨形态发生蛋白2可显著促进p21的表达,显著抑制cyclin E的表达,并显著抑制PI3K/Akt信号通路的磷酸化过程;②体内实验:实验组裸鼠皮下瘤体体积均较对照组低,免疫组化检测显示重组人骨形态发生蛋白2处理可显著降低瘤体组织中ki-67的表达水平;③研究证实在体外及体内条件下重组人骨形态发生蛋白2通过影响PI3K/Akt信号通路对乳腺癌MCF-7细胞增殖能力发挥显著抑制作用,从基础水平进一步论证了重组人骨形态发生蛋白2的临床应用不能显著增加乳腺癌的患病风险,为脊柱融合及骨不连等骨科疾病的治疗中应用重组人骨形态发生蛋白2提供了一定的理论基础。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程
ORCID: 0000-0002-2621-2226(劳立峰)

关键词: 重组人骨形态发生蛋白2, PI3K/Akt, 乳腺癌, MCF-7细胞系, 细胞增殖, 细胞周期蛋白, 体内实验, 体外研究, 临床应用

Abstract:

BACKGROUND: Clinical application of recombinant human bone morphogenetic protein-2 (rhBMP-2) has been found to increase the risk for malignant tumors, but the effect of rhBMP-2 on the proliferation of breast cancer MCF-7 cells and the underlying mechanism remain unclear.
OBJECTIVE: To explore the effects of rhBMP-2 on the proliferation of breast cancer MCF-7 cells and the underlying mechanism in vivo and in vitro.
METHODS: In vitro study: cell proliferation of MCF-7 under different concentrations of rhBMP-2 was determined by MTT assay and flow cytometry in serum-free condition. The cell cycle was detected by flow cytometry. The expression levels of p21 and cyclin E were detected by real-time PCR. The protein levels of p21, cyclin E and phosphorylation of PI3K/Akt were tested by western blot and real-time PCR. In vivo study: fourteen 6-week-old female nude mice were divided into two groups: experimental group (subcutaneous injection of rhBMP-2 plus MCF-7 cells), control group (subcutaneous injection of the same volume of MCF-7 cells).
RESULTS AND CONCLUSION: In vitro study: rhBMP-2 markedly inhibited the proliferation of MCF-7 cells in serum-free condition. After 24-hour treatment, rhBMP-2 could increase the G1 cell ratio. rhBMP-2 could significantly increase the expression of p21 as well as significantly inhibit the expression of cyclin E and phosphorylation in the PI3K/Akt signaling pathway. In vivo study: the volume of subcutaneous tumor in the experimental group was smaller than that in the control group. Immunohistochemistry revealed that rhBMP-2 could significantly decrease the expression level of ki-67 in tumor tissues. Our study suggests that rhBMP-2 has significantly suppressive effect on the proliferation of breast cancer MCF-7 cells via PI3K/Akt pathway in vitro and in vivo. Therefore, we can provide the basic science data to avoid risks of breast cancer and to support the utilization of rhBMP-2 in the management of spinal fusion, treatment of bone ununion and other orthopedic disorders.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Bone Morphogenetic Proteins, Neoplasms, Cell Proliferation, Tissue Engineering

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