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  2012, Vol. 38 Issue (3): 293-298    DOI: 10.3785/j.issn.1008-9209.2012.03.010
Biological sciences & biotechnology     
MDA-MB-231 cell apoptosis in vitro induced by dihydromyricetin.
ZHOU Fang zhen1,2,3, ZHANG Xiaoyuan1, SUN Fenyong4, GUO Yong2
1. Industrial Technology Research Institute, South China University of Technology, Guangzhou  510641, China; 2. School of Bioscience and Bioengineering, South China University of Technology, Guangzhou  510006, China;3. School of Biological Science and Technology, Hubei Institute for Nationalities, Enshi, Hubei 445000, China; 4. Department of Clinical Laboratory, Shanghai Tenth People’s Hospital, Shanghai 200072, China
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Abstract  To investigate the effect of dihydromyricetin (DMY) induction on MDA-MB-231 cell apoptosis and its mechanism, the changes of cell morphological characteristics were observed under inverted microscope. Apoptosis, intracellular Ca2+ level and the mitochondrial innermembrane potential (ΔΨm) were analyzed by flow cytometry (FCM). Western blotting was employed to detect the expression of caspase-3 and caspase-9. The results showed that the cell size and volume became smaller with increasing concentration of DMY. Increased Sub-G1 peak and intracellular Ca2+ level, as well as the decreased mitochondrial ΔΨm in MDA-MB-231 cells were obviously  observed in a dosedependent manner. Western blotting analysis showed that DMY dosedependently increased the expression of caspase-3 and caspase-9 in MDA-MB-231 cells. These results indicate that DMY can induce MDA-MB-231 cell apoptosis by the mitochondrial pathway.

Published: 24 May 2012
Cite this article:

ZHOU Fangzhen, ZHANG Xiaoyuan, SUN Fenyong, GUO Yong. MDA-MB-231 cell apoptosis in vitro induced by dihydromyricetin.. , 2012, 38(3): 293-298.

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http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2012.03.010     OR     http://www.zjujournals.com/agr/Y2012/V38/I3/293


二氢杨梅素诱导MDA-MB-231细胞凋亡

为了探讨二氢杨梅素(dihydromyricetin,DMY)诱导人乳腺癌MDA-MB-231细胞凋亡的机制,利用倒置显微镜观察细胞形态变化,用流式细胞仪检测DMY对MDA-MB-231细胞的致凋亡能力和细胞内钙离子浓度和线粒体膜电位(ΔΨm)的改变,用蛋白质印迹(Western blotting)分析检测半胱氨酸天冬氨酸蛋白酶-3(caspase-3)和半胱氨酸天冬氨酸蛋白酶-9(caspase-9)的变化。结果表明:MDA-MB-231细胞随DMY质量浓度加大而变圆变小,细胞存活数减少;流式细胞仪检测显示随DMY质量浓度的增加,DMY对MDA-MB-231细胞有促凋亡作用,胞内钙离子浓度逐渐增加,而线粒体跨膜电位(ΔΨm)逐渐减少;Western blotting结果显示DMY可诱导MDA-MB-231细胞中caspase-3和caspase-9蛋白质活化,并呈现浓度依赖关系。表明DMY可通过线粒体途径诱导MDA-MB-231细胞凋亡。
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