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1.兰州大学第一医院普外科六病区,兰州 730030
2.兰州大学第一临床医学院,兰州 730030
姜 雷,Email:jiangzx@lzu.edu.cn,研究方向:胃癌侵袭转移的分子机制研究。
姚 南,Email:405446244@qq.com。
收稿:2021-11-08,
修回:2022-03-20,
录用:2022-05-11,
纸质出版:2023-02-28
移动端阅览
姜雷,闵光涛,王军,等.Bcl-2相关的永生基因4对胃癌干细胞自我更新能力的调控作用[J].重庆医科大学学报,2023,48(2):136-142.
Jiang Lei,Min Guangtao,Wang Jun,et al.Bcl-2 associated athanogene 4 regulates self-renewal in gastric cancer stem cells[J].Journal of Chongqing Medical University,2023,48(2):136-142.
姜雷,闵光涛,王军,等.Bcl-2相关的永生基因4对胃癌干细胞自我更新能力的调控作用[J].重庆医科大学学报,2023,48(2):136-142. DOI: 10.13406/j.cnki.cyxb.003173.
Jiang Lei,Min Guangtao,Wang Jun,et al.Bcl-2 associated athanogene 4 regulates self-renewal in gastric cancer stem cells[J].Journal of Chongqing Medical University,2023,48(2):136-142. DOI: 10.13406/j.cnki.cyxb.003173.
目的
2
探讨Bcl-2相关的永生基因4(Bcl-2 associated athanogene 4,BAG4)在胃癌干细胞(gastric cancer stem cells,GCSCs)自我更新能力中的调控作用。
方法
2
采用成球培养法分离/富集GCSCs,并对其生物学特征进行鉴定。采用慢病毒干扰技术构建沉默BAG4表达的MGC803胃癌细胞系,以平板克隆形成和成球实验分别检测沉默BAG4对胃癌细胞克隆形成和成球能力的影响。
结果
2
成球培养法成功分离/富集出球细胞(sphere cell,SC)。与普通单层贴壁细胞相比,MGC803-SC高表达干性相关基因
Sox2、Oct4
和
Bmi1
,具有更强的克隆形成能力(198±17 vs.
92±11,
P
<
0.001),诱导分化后干性标志物CD44表达下降,在体外具有更强的侵袭能力(185±18 vs.
84±11,
P
<
0.01)。上述实验结果证实MGC803-SC具有GCSCs特性。BAG4在GCSCs中的表达水平明显高于普通贴壁胃癌细胞,沉默BAG4明显降低胃癌细胞的克隆形成和成球能力。
结论
2
沉默
BAG4
基因能有效抑制GCSCs的自我更新能力,有望成为胃癌靶向治疗的新靶标。
Objective
2
To investigate the role of Bcl-2 associated athanogene 4(BAG4) in self-renewal capacity of gastric cancer stem cells(GCSCs).
Methods
2
GCSCs were isolated/enriched using sphere forming culture system, and their biological characteristics were identified. BAG4-knockdown MGC803 gastric cancer cell lines were constructed by lentivirus interference technique. Colony and tumor sphere formation assay were used to estimate the effect of BAG4-knockdown on self-renewal capacity of gastric cancer
in vitro
.
Results
2
We successfully isolated/enriched sphere cells(SC) using sphere forming culture system. MGC803-SC showed higher expression level of stem-related genes
Sox2, Oct4
and
Bmi1
than normal adherent cells, and showed stronger clone-for
mation ability(198±17 vs. 92±11,
P
<
0.001). After induction of differentiation, the expression of CD44 decreased,and showed stronger invasion ability
in vitro
(185±18 vs. 84±11,
P
<
0.01). The above experimental results confirmed that MGC803-SC had GCSCs properties. The expression level of BAG4 in GCSCs was significantly higher than that in normal adherent gastric cancer cells.
Conclusion
2
Silencing
BAG4
gene can effectively inhibit the self-renewal ability of GCSCs,suggesting that BAG4 might be a promising target for gastric cancer therapy.
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