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1.广州中医药大学 基础医学院,广州 510006
2.暨南大学 中西医结合博士后流动站,广州 510632
3.深圳市老年医学研究所,广东 深圳 518020
黄小飞,在读硕士,从事中医药抗肿瘤研究,E-mail:535434113@qq.com
* 陶成,博士,助理研究员,从事有机合成、天然产物全合成和结构修饰研究,E-mail:taoch09@lzu.edu.cn;
陈健,博士,助理研究员,从事抗肿瘤新药研究,E-mail:chenjian@jnu.edu.cn
收稿日期:2020-03-31,
网络出版日期:2020-08-20,
纸质出版日期:2020-12-05
移动端阅览
黄小飞,陈子德,陶成等.厚朴酚衍生物CT2-3对结肠癌细胞的抑制作用及其机制[J].中国实验方剂学杂志,2020,26(23):113-119.
HUANG Xiao-fei,CHEN Zi-de,TAO Cheng,et al.Inhibitory Effect of Magnolol Analogue CT2-3 on Colon Cancer Cells and Its Mechanism[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(23):113-119.
黄小飞,陈子德,陶成等.厚朴酚衍生物CT2-3对结肠癌细胞的抑制作用及其机制[J].中国实验方剂学杂志,2020,26(23):113-119. DOI: 10.13422/j.cnki.syfjx.20202122.
HUANG Xiao-fei,CHEN Zi-de,TAO Cheng,et al.Inhibitory Effect of Magnolol Analogue CT2-3 on Colon Cancer Cells and Its Mechanism[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(23):113-119. DOI: 10.13422/j.cnki.syfjx.20202122.
目的
2
研究厚朴酚衍生物CT2-3对结肠癌细胞的抑制作用及其机制,为CT2-3在治疗结肠癌中的应用奠定基础。
方法
2
体外培养SW480和LoVo细胞,不同浓度(10,20,40,80 μmol·L
-1
)CT2-3和厚朴酚分别干预24,48 h,采用细胞增殖-毒性检测(CCK-8)法检测CT2-3和厚朴酚对结肠癌细胞增殖的影响;采用平板克隆形成实验检测CT2-3对结肠癌细胞克隆形成能力的影响;进一步采用流式细胞术和蛋白免疫印迹法(Western blot)检测CT2-3对结肠癌细胞凋亡和DNA损伤标志物磷酸化组蛋白H2AX(
γ
H2AX)蛋白表达的影响;采用活性氧(ROS)试剂盒检测CT2-3对结肠癌细胞内ROS产生的影响;最后用实时荧光定量聚合酶链式反应(Real-time PCR)检测CT2-3对结肠癌细胞内线粒体凋亡相关基因B细胞淋巴瘤-2(Bcl-2)和Bcl-2相关X基因(Bax)表达的影响。
结果
2
给药24,48 h,厚朴酚对两株结肠癌细胞SW480和LoVo的半数抑制浓度(IC
50
)均
>
80 μmol·L
-1
,CT2-3对SW480细胞的IC
50
分别为(54.59±1.73) μmol·L
-1
和(29.82±1.13) μmol·L
-1
,对LoVo细胞的IC
50
分别为(66.68±2.11) μmol·L
-1
和(46.70±1.81) μmol·L
-1
;与空白组比较,CT2-3(20,40 μmol·L
-1
)组结肠癌细胞克隆形成能力显著下降(
P
<
0.01),且呈浓度依赖性。CT2-3组凋亡细胞显著增加(
P
<
0.01),
γ
H2AX蛋白相对表达显著增加(
P
<
0.01);CT2-3组细胞内ROS水平显著增加(
P
<
0.01);CT2-3组细胞Bcl-2 mRNA相对表达显著下调(
P
<
0.01),Bax mRNA相对表达显著上调(
P
<
0.01)。
结论
2
CT2-3对结肠癌细胞具有显著抑制作用,其机制可能是通过激活Bcl-2/Bax信号通路使线粒体功能受损,促进ROS的产生,进一步诱导DNA损伤,从而导致结肠癌细胞凋亡。
Objective
2
To study the anti-colon cancer effect and mechanism of magnolol analogue CT2-3, in order to lay a foundation for the application of CT2-3 in anti-colon cancer area.
Method
2
Colon cancer cells SW480 and LoVo were cultured
in vitro
. Different concentrations (10, 20, 40, 80 μmol·L
-1
) of CT2-3 and magnolol were used to stimulate colon cancer cells for 24, 48 h. The effect of CT2-3 and magnolol on the cell viability of colon cancer cells was detected by cell counting kit (CCK-8). Colony formation assay was used to detect the colony formation capacity of CT2-3 on colon cancer cells. Flow cytometry and Western blot were used to determine the effect of CT2-3 on the apoptosis of colon cancer cells and the expression of DNA damage marker phosphorylated histone H2AX (
γ
H2AX). Reactive oxygen species (ROS) generation was measured by ROS assay kit. Real time quantitative polymerase chain reaction (Real-time PCR) was used to detect the effect of CT2-3 on expressions of mitochondrial apoptosis-related genes B-cell lymphoma-2 (Bcl-2) and Bcl-2-associated X (Bax) in colon cancer cells.
Result
2
The half maximal inhibitory concentration (IC
50
) of magnolol in two kinds of colon cancer cells after treatment for 24, 48 h were both higher than 80 μmol·L
-1
. While the IC
50
of CT2-3 in SW480 cells after treatment for 24, 48 h were (54.59±1.73) μmol·L
-1
and (29.82±1.13) μmol·L
-1
, respectively. The IC
50
of CT2-3 in LoVo cells after treatment for 24,48 h were (66.68±2.11) μmol·L
-1
and (46.70±1.81) μmol·L
-1
, respectively. Compared with the blank group, the colony formation capacity of colon cancer cells in CT2-3 groups (20, 40 μmol·L
-1
) was significantly decreased in a dose-dependent manner (
P
<
0.01), apoptotic colon cancer cells were significantly increased (
P
<
0.01), relative expression of DNA damage marker
γ
H2AX was significantly increased (
P
<
0.01), ROS was significantly increased (
P
<
0.01). In addition, relative mRNA expression of Bcl-2 was significantly decreased (
P
<
0.01), while relative mRNA expression of Bax was significantly increased (
P
<
0.01).
Conclusion
2
CT2-3 can remarkably inhibit colon cancer cells, and the underlying mechanism might be that CT2-3 promotes mitochondria dysfunction and ROS generation by regulating expressions of mitochondrial apoptosis-related genes, so as to further induce DNA damage and finally lead to apoptosis.
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