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.
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.
Effect of Licochalcone A on Apoptosis in Human Breast Cancer MDA-MB-231 Cells
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.
关键词
Keywords
references
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