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1.海军军医大学 长海医院,上海 200433
2.上海市普陀区中心医院,上海 200062
袁永贵,药师,从事医药药学及肿瘤防治研究,E-mail:yyg8233858@163.com
* 乐佳敏,药师,从事临床药学及肿瘤防治研究,E-mail:772996014@qq.com
收稿日期:2021-06-24,
网络出版日期:2021-08-23,
纸质出版日期:2021-10-20
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袁永贵,张夏炎,朱晓俊等.甘草查尔酮A对人乳腺癌MDA-MB-231细胞凋亡的影响[J].中国实验方剂学杂志,2021,27(20):95-100.
YUAN Yong-gui,ZHANG Xia-yan,ZHU Xiao-jun,et al.Effect of Licochalcone A on Apoptosis in Human Breast Cancer MDA-MB-231 Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(20):95-100.
袁永贵,张夏炎,朱晓俊等.甘草查尔酮A对人乳腺癌MDA-MB-231细胞凋亡的影响[J].中国实验方剂学杂志,2021,27(20):95-100. DOI: 10.13422/j.cnki.syfjx.20212022.
YUAN Yong-gui,ZHANG Xia-yan,ZHU Xiao-jun,et al.Effect of Licochalcone A on Apoptosis in Human Breast Cancer MDA-MB-231 Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(20):95-100. DOI: 10.13422/j.cnki.syfjx.20212022.
目的
2
观察甘草查尔酮A对人乳腺癌MDA-MB-231细胞凋亡的影响,并探讨其可能作用机制。
方法
2
细胞增殖与活性检测(CCK-8)法检测不同浓度甘草查尔酮A对MDA-MB-231细胞存活率的影响;甘草查尔酮A(10,20,40 μmol·L
-1
)作用MDA-MB-231细胞24 h,分别用细胞凋亡试剂盒(Annexin V-FITC/PI)检测细胞凋亡情况;荧光探针法(DCFA-DA)检测细胞内活性氧(ROS)水平,荧光探针(JC-1)法检测细胞线粒体膜电位(MMP);蛋白免疫印迹法(Western blot)检测细胞凋亡相关蛋白B细胞淋巴瘤-2(Bcl-2),B细胞淋巴瘤-2相关X蛋白(Bax)的表达及内质网应激相关蛋白(CHOP),转录激活因子4(ATF4),蛋白激酶R样内质网激酶(PERK),磷酸化蛋白激酶R样内质网激酶(p-PERK),真核翻译起始因子2
α
(eIF2
α),
磷酸化真核翻译起始因子2
α
(p-eIF2
α
)表达。
结果
2
与空白组比较,随着甘草查尔酮A浓度增大,从甘草查尔酮A 5 μmol·L
-1
开始,细胞存活率明显降低(
P
<
0.05),其半数抑制浓度(IC
50
)为19.05 μmol·L
-1
;甘草查尔酮A(10,20,40 μmol·L
-1
)组细胞凋亡明显升高(
P<
0.05),甘草查尔酮A 40 μmol·L
-1
时细胞凋亡率达30.2%(
P
<
0.05);甘草查尔酮A(10,20,40 μmol·L
-1
)使抗凋亡蛋白Bcl-2的表达明显降低(
P
<
0.05),促凋亡蛋白Bax表达明显升高(
P
<
0.05),且呈浓度依赖性;甘草查尔酮A(10,20,40 μmol·L
-1
)明显升高细胞内ROS水平(
P
<
0.05),降低线粒体MMP水平(
P
<
0.05),导致线粒体功能障碍,呈浓度依赖性;甘草查尔酮A(10,20,40 μmol·L
-1
)诱导内质网应激,使内质网应激相关蛋白CHOP,ATF4表达明显增多,磷酸化(p)-PERK,p-eIF2
α
表达明显升高(
P
<
0.05),呈浓度依赖性。
结论
2
甘草查尔酮A可能通过增加细胞内ROS水平,降低MMP引起线粒体功能障碍和内质网应激诱导MDA-MB-231细胞凋亡。
Objective
2
To investigate the effect of licochalcone A (LCA) on apoptosis in human breast cancer MDA-MB-231 cells, and to explore its possible mechanism.
Method
2
MDA-MB-231 cells were treated with LCA of different concentrations, and
cell counting kit-8 (CCK-8) assay was used to detect the cell viability. The cells were treated with LCA (10, 20, and 40 μmol·L
-1
) for 24 h, and apoptosis was detected by Annexin V staining with fluorescein isothiocyanate (FITC) and propidium iodide (PI) (Annexin V-FITC/PI). The level of intracellular reactive oxygen species (ROS) was detected by 2′,7′-dichlorodihydrofluorescein diacetate (DCFA-DA) fluorescent probe. Mitochondrial membrane potential (MMP) was detected by 5, 5′, 6, 6′-tetrachloro-1, 1′, 3, 3′-tetraethyl-imidacarbocyanine (JC-1) fluorescence probe. Western blot was used to detect the expression of cell apoptosis-related proteins, such as B-cell lymphoma-2 (Bcl-2) and Bcl-2-associated X protein (Bax), and endoplasmic reticulum (ER) stress-related proteins, such as C/EBP homologous protein (CHOP), activating transcription factor 4 (ATF4), protein kinase R-like ER kinase (PERK), p-PERK, eukaryotic translation initiation factor 2 alpha (eIF2
α
), and p-eIF2
α
.
Result
2
With the increase in the drug concentration (starting from 5 μmol·L
-1
), the cell viability decreased (
P<
0.05) with IC
50
of 19.05 μmol·L
-1
as compared with the normal group. Additionally, the apoptosis rates of the LCA groups (10, 20, 40 μmol·L
-1
) significantly increased (
P
<
0.05), which reached 30.2% (
P
<
0.05) at LCA concentration of 40 μmol·L
-1
. LCA (10, 20, and 40 μmol·L
-1
) decreased the expression of Bcl-2 (
P<
0.05) and increased Bax expression (
P<
0.05) in a dose-dependent manner. Besides, the intracellular ROS level was elevated (
P<
0.05) and mitochondrial MMP was reduced (
P<
0.05) after LCA (10, 20, and 40 μmol·L
-1
) treatment in a dose-dependent manner, leading to mitochondrial dysfunction. LCA (10, 20, and 40 μmol·L
-1
) induced ER stress to up-regulate the expression of CHOP, ATF4, p-PERK, and p-eIF2
α
(
P<
0.05) in a dose-dependent manner.
Conclusion
2
LCA can induce MDA-MB-231 cell apoptosis by increasing intracellular ROS level and reducing MMP to trigger mitochondrial dysfunction and ER stress.
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