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Dihydroartemisinin inhibits endothelial cell proliferation through the suppression of the ERK signaling pathway.

Abstract
Disrupting tumor angiogenesis serves as an important strategy for cancer therapy. Dihydroartemisinin (DHA), a semi-synthetic derivative of artemisinin, has exhibited potent anti-angiogenic activity. However, the molecular mechanisms underlying this effect have not been fully understood. The present study aimed to investigate the role of DHA on endothelial cell proliferation, the essential process in angiogenesis. Human umbilical vein endothelial cells (HUVECs) treated with DHA were examined for proliferation, apoptosis and activation of the extracellular signal-regulated kinase (ERK) signaling pathway. Proliferation of HUVECs was inhibited by 20 µM DHA without induction of apoptosis. DHA also reduced the phosphorylation of ERK1/2, and downregulated the mRNA and protein expression of ERK1/2 in HUVECs. In addition, DHA suppressed the transcription and protein expression of ERK1/2 downstream effectors c-Fos and c-Myc. Electrical cell-substrate impedance sensing real-time analysis demonstrated that ERK signaling inhibitor PD98059 comprises the anti-proliferative effects of DHA. Thus, DHA inhibits endothelial cell proliferation by suppressing the ERK signaling pathway. The present study strengthened the potential of DHA as an angiogenesis inhibitor for cancer treatment.
AuthorsFengyun Dong, Hu Tian, Suhua Yan, Liqun Li, Xiaofeng Dong, Fuhai Wang, Jie Li, Changsheng Li, Zhiqun Cao, Xiaochun Liu, Ju Liu
JournalInternational journal of molecular medicine (Int J Mol Med) Vol. 35 Issue 5 Pg. 1381-7 (May 2015) ISSN: 1791-244X [Electronic] Greece
PMID25778668 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Artemisinins
  • artenimol
  • Mitogen-Activated Protein Kinase 1
  • Mitogen-Activated Protein Kinase 3
Topics
  • Artemisinins (pharmacology)
  • Cell Proliferation (drug effects)
  • Dose-Response Relationship, Drug
  • Epithelial Cells (drug effects, metabolism)
  • Human Umbilical Vein Endothelial Cells
  • Humans
  • MAP Kinase Signaling System (drug effects)
  • Mitogen-Activated Protein Kinase 1 (metabolism)
  • Mitogen-Activated Protein Kinase 3 (metabolism)
  • Phosphorylation

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