中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (41): 6112-6117.doi: 10.3969/j.issn.2095-4344.2016.41.005

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

白血病患儿骨髓间充质干细胞与白血病细胞株K562/AO2生长增殖及凋亡的相关性

雷春霞   

  1. 武汉市儿童医院新生儿内科,湖北省武汉市  430016
  • 修回日期:2016-08-05 出版日期:2016-10-07 发布日期:2016-10-07
  • 作者简介:雷春霞,女,1979年生,湖北省黄冈市人,2010年武汉大学第一临床学院毕业,硕士,主治医师,主要从事早产儿心肺发育及动脉导管未闭方面的研究。

Correlation between growth, proliferation and apoptosis of leukemia cell lines K562/AO2 and bone marrow mesenchymal stem cells in children with leukemia

Lei Chun-xia   

  1. Department of Neonatal Medicine, Wuhan Women and Children Medical Care Center, Wuhan 430016, Hubei Province, Chin
  • Revised:2016-08-05 Online:2016-10-07 Published:2016-10-07
  • About author:Lei Chun-xia, Master, Attending physician, Department of Neonatal Medicine, Wuhan Women and Children Medical Care Center, Wuhan 430016, Hubei Province, China

摘要:

文章快速阅读:

文题释义:
细胞凋亡:
是为维持内环境稳定,由基因控制的细胞自主有序的死亡。细胞凋亡属于主动过程,它涉及一系列基因的激活、表达以及调控等作用,它并不是病理条件下,自体损伤的一种现象,而是为更好地适应生存环境而主动争取的一种死亡过程。
锥虫蓝染色:正常的活细胞胞膜结构完整,能够排斥锥虫蓝,使之不能够进入胞内;而丧失活性或细胞膜不完整的细胞,胞膜的通透性增加,可被锥虫蓝染成蓝色。因此,借助锥虫蓝染色可以非常简便、快速地区分活细胞和死细胞。锥虫蓝染色后,通过显微镜下直接计数或显微镜下拍照后计数,就可以对细胞存活率进行比较精确的定量。

 

摘要
背景:
骨髓微环境是白血病的发病根源,微环境的改变对白血病细胞的生物学行为和性能有一定的影响。
目的:探讨白血病患儿骨髓间充质干细胞对K562/AO2细胞生长增殖及凋亡的影响。
方法:体外环境下进行K562/AO2细胞单独悬浮培养,K562/AO2细胞与白血病患儿骨髓间充质干细胞共培养。锥虫蓝染色计数活细胞数,描绘两组细胞生长曲线,PI单染法检测细胞周期,Annexin V/PI法检测细胞凋亡情况。
结果与结论:①单独培养组前3 d细胞生长未出现明显改变,第4天开始细胞增殖速度明显加快,并于培养第6天达到最高峰。共培养组整体增殖曲线较为平缓,无明显的增殖高峰;②单独培养组的G0-G1期细胞比例显著低于共培养组,S期细胞比例显著高于共培养组(P < 0.05)。两组G2-M期细胞比例差异无显著性意义;③单独培养组的细胞凋亡数显著高于共培养组(P < 0.05);④结果表明,与白血病患儿骨髓间充质干细胞共培养后K562/AO2细胞生长受到抑制,细胞周期阻滞在G0-G1期,且会对K562/AO2细胞凋亡产生抵抗作用。

 

 

关键词: 干细胞, 骨髓干细胞, 白血病, 骨髓间充质干细胞, 白血病细胞株, 细胞增殖, 细胞凋亡, 细胞周期

Abstract:

BACKGROUND: Leukemia comes from the damage to bone marrow microenvironment, and changes in bone marrow microenvironment lead to some effects on biological characteristics and behavior of leukemia cells.
OBJECTIVE: To explore the effect of bone marrow mesenchymal stem cells from children with leukemia on K562/AO2 cell line growth, proliferation and apoptosis.
METHODS: K562/AO2 cells were cultured alone in vitro, or co-cultured with bone marrow mesenchymal stem cells from leukemia children. The living cells in the two groups were counted using trypan blue staining, and the cell growth curves were described. PI single staining method was used to detect the cell cycle, and cell apoptosis was detected by V/PI Annexin method in the two groups.
RESULTS AND CONCLUSION: After single suspension culture, the cells showed no marked changes within the first 3 days, but began to proliferate fast at 4 days and reached the proliferation peak at 6 days. Co-cultured cells showed a gentle growth curve with no presence of obvious proliferation peak. Compared with the co-culture group, the proportion of G0/G1 phase cells was significantly lower, but the proportion of S phase cells was significantly higher in the single culture group (P < 0.05). The number of cells in the G2/M phase showed no significant difference between the two groups (P > 0.05). All these findings indicate that co-culture with bone marrow mesenchymal stem cells from leukemia children inhibits the proliferation of K562/AO2 cells through G0/G1 phase arrest, and also resists apoptosis in K562/AO2 cells.

 

 

Key words: Leukemia, Bone Marrow, Mesenchymal Stem Cells, Cell Proliferation, Apoptosis, Tissue Engineering

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