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KMID : 0380020150300050223
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Korean Journal of Biotechnology and Bioengineering
2015 Volume.30 No. 5 p.223 ~ p.229
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Cell Cycle Arrest of Extract from Artemisia annua Linne. Via AktmTOR Signaling Pathway in HCT116 Colon Cancer Cells
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Kim Bo-Min
Kim Guen-Tae
Lim Eun-Gyeong
Kim Eun-Ji
Kim Sang-Yong
Ha Sung-Ho
Kim Young-Min
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Abstract
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In this study, extract from Artemisia annua in L. (AAE) is known as a medicinal herb that is effective against cancer. The cell cycle is regulated by the activation of cyclindependent kinase (CDK)/cyclin complex. We will focus on regulation of CDK2 by cyclin E. cyclin E is associated with CDK2 to regulate progression from G1 into S phase. Akt is known to play an important role in cell proliferation and cell survival. Activation of Akt increases mTOR activity that promotes cell proliferation and cancer growth. In this study, we investigated that AAE-induced cell cycle arrest at G1/S phase in HCT116 colon cancer. Treatment of AAE shows that reduced activation of Akt decreases mTOR/Mdm2 activity and then leads to increase the activation of p53. The active p53 promotes activation of p21. p21 induces inactivation of CDK2/ cyclin E complex and occurs cell cycle arrest at G1/S phase. We treated LY294002 (Akt inhibitor) and Rapamycin (mTOR inhibitor) to know the relationship between the signal transduction of proteins associated with cell cycle arrest. These results suggest that AAE induces cell cycle arrest at G1/S phase by Akt/mTOR pathway in HCT116 colon cancer cell.
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KEYWORD
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AAE, Cell cycle arrest, Akt/mTOR pathway, HCT116
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