1.广州医科大学附属第二医院神经科学研究所,广东 广州510260
2.广州医科大学附属第二医院番禺院区神经外科,广东 广州511400
3.粤港澳大湾区脑科学与类脑研究中心,广东 广州510515
李慧锋,硕士生,研究方向:神经肿瘤发病机制与防治,E-mail: lhf117402@163.com
收稿:2022-02-25,
纸质出版:2022-07-20
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李慧锋,袁忠民,吴森斌等.组蛋白去乙酰化酶抑制剂通过下调MCM2-7表达抑制神经胶质瘤细胞增殖[J].中山大学学报(医学科学版),2022,43(04):530-538.
LI Hui-feng,YUAN Zhong-min,WU Sen-bin,et al.Histone Deacetylase Inhibitors Suppress Glioma Cell Proliferation by Downregulating MCM2-7 Expression[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(04):530-538.
李慧锋,袁忠民,吴森斌等.组蛋白去乙酰化酶抑制剂通过下调MCM2-7表达抑制神经胶质瘤细胞增殖[J].中山大学学报(医学科学版),2022,43(04):530-538. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0403.
LI Hui-feng,YUAN Zhong-min,WU Sen-bin,et al.Histone Deacetylase Inhibitors Suppress Glioma Cell Proliferation by Downregulating MCM2-7 Expression[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(04):530-538. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0403.
目的
2
探讨组蛋白去乙酰化酶抑制剂(HDACIs)抑制神经胶质瘤细胞增殖的机制。
方法
2
体外培养U251和H4细胞,用组蛋白去乙酰化酶抑制剂:包括帕比司他(LBH589)和M344、伏立诺他(SAHA)处理后,MTT比色法检测细胞存活率,流式细胞术检测细胞周期进程改变,Western blotting和RT-qPCR法分别检测minichromosome maintenance (MCM)蛋白家族成员MCM2、MCM3、MCM4、MCM5、MCM6和MCM7的mRNA和蛋白表达水平。用组蛋白去乙酰化酶抑制剂:包括帕比司他和曲古霉素(TSA)处理U251细胞后,BrdU掺入实验检测细胞增殖和DNA复制能力。用MCM抑制剂环丙沙星(CPX)处理U251和H4细胞,MTT法检测细胞存活率,流式细胞术检测细胞周期进程改变。
结果
2
与对照组相比,HDACIs降低了U251和H4活细胞数量(
P
<
0.05);HDACIs组BrdU的掺入率降低(
P
<
0.05);HDACIs减少细胞周期S期的比率(
P
<
0.05);Western blotting和qPCR结果显示,HDACIs降低MCM2-7 mRNA和蛋白表达水平(
P
<
0.05);与对照组相比,CPX降低了U251和H4活细胞数量(
P
<
0.05),减少细胞周期S期的比率(
P
<
0.05)。
结论
2
HDACIs通过下调MCM2-7表达抑制神经胶质瘤细胞增殖。
objective
2
To investigate the mechanism of histone deacetylase inhibitors (HDACIs) in suppressing glioma cell proliferation.
Methods
2
Glioma cell lines U251 and H4 were cultured in vitro and treated with HDACIs, including LBH589, M344 and SAHA, MTT assay, flow cytometry, RT-qPCR assay and western blotting were perfomed to determine the cell viability, cell cycle progression, mRNA and protein expression of minichromosome maintenance protein family (MCM2-7), respectively. BrdU assay was performed to detect the DNA replication in the U251 cells after they were treated with 0.5 µmol/L LBH589 and 0.5 µmol/L TSA. MTT assay and flow cytometry were performed to determine the viability and cell cycle progression of U251 and H4 cells respectively after they were treated with ciprofloxacin (CPX).
Results
2
Compared with those in control group, in HDACIs group, the cell viability was significantly decreased; the viability of cells treated with 0.5 µmol/L LBH589 for 12, 16, 24 h was significantly lower and the longer the LBH589 treatment, the lower the viability (
P
<
0.05). The percentage of U251 and H4 cells in S-phase was significantly lower (
P
<
0.05). The mRNA and protein expression of MCM2-7 was significantly decreased (
P
<
0.05). BrdU incorporation rate was lower. The cell viability and S-phase cell percentage of U251 and H4 cells treated with 0.5 mmol/L LBH589 in CPX group were significantly decreased (both
P
<
0.05).
Conclusion
2
HDACIs suppress glioma cell proliferation via downregulating MCM2-7 expression.
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