中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (25): 4032-4037.doi: 10.3969/j.issn.2095-4344.2017.25.016

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

脐带间充质干细胞增强伊马替尼诱导慢性粒细胞白血病细胞的凋亡

刘 莹1,宋宝全2,魏艺萌1,范会芳1,余 怡1,董树旭1,韩忠朝1,3,马凤霞1   

  1. 1中国医学科学院北京协和医学院血液学研究所血液病医院,实验血液学国家重点实验室,天津市 300020;2苏州大学第一附属医院血液科,江苏省苏州市 215006;3细胞产品国家工程研究中心,天津市 300457)
  • 修回日期:2017-07-24 出版日期:2017-09-08 发布日期:2017-10-09
  • 通讯作者: 马凤霞,博士,副研究员,硕士生导师,中国医学科学院北京协和医学院血液学研究所血液病医院,实验血液学国家重点实验室,天津市 300020
  • 作者简介:刘莹,女,1989年生,河北省张家口市人,汉族,2017年北京协和医学院毕业,硕士,主要从事间充质干细胞及其外泌体的相关研究。
  • 基金资助:

    中国医学科学院医学与健康科技创新工程项目(2016-I2M-1-017)

Umbilical cord mesenchymal stem cells enhance imatinib-induced apoptosis in chronic myeloid leukemia

Liu Ying1, Song Bao-quan2, Wei Yi-meng1, Fan Hui-fang1, Yu Yi1, Dong Shu-xu1, Han Zhong-chao1, 3, Ma Feng-xia1   

  1. 1State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences& Peking Union Medical College, Tianjin 300020, China; 2Department of Hematology, the First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China; 3National Engineering Research Center of Cell Products, Tianjin 300457, China
  • Revised:2017-07-24 Online:2017-09-08 Published:2017-10-09
  • Contact: Ma Feng-xia, M.D., Associate investigator, Master’s supervisor, State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
  • About author:Liu Ying, Master, State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
  • Supported by:

    CAMS Initiative for Innovative Medicine (CAMS-I2M), No. 2016-I2M-1-017

摘要:

文章快速阅读:

 

文题释义:
Ph染色体:
即费城染色体,由Nowell等于1960年首次在费城发现并命名。表现为22号染色体的长臂缺失或22号染色体长臂与9号染色体长臂相互易位,即t(9;22)(q34;q21)。97.5%的Ph染色体阳性的慢性粒细胞白血病具有典型的t(9;22)易位,其余则表现为变异Ph易位形式出现,包括简单变异易位,复杂变异易位,隐匿性Ph染色体。
慢性粒细胞白血病:起源于多能造血干细胞的恶性克隆增殖性疾病,累及粒系、红系、巨核系、B淋巴细胞系,某些时候甚至累及T淋巴细胞系,病变不累及骨髓成纤维细胞系。以白细胞增高、粒细胞成熟障碍、嗜碱性粒细胞增多、贫血、幼稚粒细胞增高等为特征,常有血小板增多和显著的脾大,骨髓中粒系细胞增生明显。它和真性红细胞增多症、原发性血小板增多症、原发性骨髓纤维化同属骨髓增殖性疾病。慢性粒细胞白血病发病率较低,约1.25/10万,占白血病患者的15%,儿童少见,终末发病年龄为50岁,男性略高,男女比率为1.6∶1,射线是惟一已知的流行病学因素,辐射潜伏期4-11年不等。

 

摘要
背景:
伊马替尼对慢性粒细胞白血病疗效显著,但仍有部分患者对其敏感性较低。人间充质干细胞影响多种血液系统肿瘤的凋亡,但人脐带间充质干细胞是否影响伊马替尼诱导的慢性粒细胞白血病细胞的凋亡的相关研究未见报道。
目的:研究人脐带间充质干细胞与伊马替尼联合应用对慢性粒细胞白血病细胞K562细胞凋亡的影响并探讨作用机制。
方法:K562细胞与人脐带间充质干细胞和/或伊马替尼共培养。①分离培养人脐带间充质干细胞并鉴定;②应用流式细胞仪AnnexinV-FITC/PI双标法检测细胞凋亡率;③Western blot检测凋亡信号通路相关蛋白Bax,Bcl-2,caspase-9,caspase-3,PARP在K562细胞的表达;④应用泛caspase抑制剂Z-VAD-FMK抑制caspase信号通路活性,检测caspase凋亡信号通路在人脐带间充质干细胞联合伊马替尼诱导K562细胞凋亡中的作用。
结果与结论:①体外细胞凋亡实验证实:当人脐带间充质干细胞联合伊马替尼时,K562细胞凋亡率显著增加;②Western blot实验证明,当人脐带间充质干细胞联合伊马替尼时,促凋亡蛋白Bax表达升高,抑凋亡蛋白Bcl-2表达降低,caspase凋亡信号通路相关蛋白剪切体形式cleaved-caspase3、cleaved-caspase9及cleaved-PARP均表达升高;③泛caspase抑制剂Z-VAD-FMK显著抑制人脐带间充质干细胞和伊马替尼联合应用实验组中K562细胞的凋亡;④结果表明,人脐带间充质干细胞联合伊马替尼可促进慢性粒细胞白血病细胞的凋亡,其作用机制是通过激活caspase凋亡信号通路实现的。

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: 0000-0001-8404-303X(马凤霞)

关键词: 干细胞, 移植, 慢性粒细胞白血病, 间充质干细胞, Ph染色体, caspase凋亡信号通路, Bax, Bcl, K562细胞, 酪氨酸激酶抑制剂

Abstract:

BACKGROUND: Imatinib has a significant pro-apoptosis effect on chronic myelogenous leukemia (CML), but there are still some patients being resistant to it. Human umbilical cord mesenchymal stem cells (hUC-MSCs) affect the apoptosis of a variety of hematologic malignancies. However, the impacts of hUC-MSCs on the apoptosis of CML cells induced by imatinib remain unclear.
OBJECTIVE: To investigate whether hUC-MSCs have an influence on the apoptosis of K562 cells induced by imatinib and to reveal the possible underlying mechanism.
METHODS: K562 cells were cultured with hUC-MSCs or/and imatinib. Cellular apoptosis was measured with Annexin-V and PI staining by flow cytometry analysis. The protein expressions of Bax, Bcl-2, caspase-3, caspase-9 and cleaved-PARP in K562 cells were detected by western blot assay. Pan-caspase inhibitor Z-VAD-FMK was used to block apoptosis in each group, and during this process the effect of caspase apoptosis signaling pathway was detected.
RESULTS AND CONCLUSION: The apoptosis of K562 cells was enhanced, when imatinib was combined with hUC-MSCs. Western blot analysis showed that the expression of pro-apoptotic protein Bax was enhenced and the expression of anti-apoptotic protein Bcl-2 was suppressed. Furthermore, the cleaved forms of caspase-9, caspase-3 and PARP in K562 cell were higher in the hUC-MSCs+imatinib group than in the imatinib group. The apoptosis of K562 cells induced by the hUC-MSCs combined with imatinib was significantly inhibited by Z-VAD-FMK. In conclusion, these findings indicate that hUC-MSCs can enhance imatinib-induced apoptosis of K562 cells by activating caspase apoptosis signaling pathway.

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: Umbilical Cord, Apoptosis, Tissue Engineering

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